diff options
Diffstat (limited to 'libraries/libldap/tls_m.c')
| -rw-r--r-- | libraries/libldap/tls_m.c | 3324 |
1 files changed, 3324 insertions, 0 deletions
diff --git a/libraries/libldap/tls_m.c b/libraries/libldap/tls_m.c new file mode 100644 index 0000000..fb5554e --- /dev/null +++ b/libraries/libldap/tls_m.c @@ -0,0 +1,3324 @@ +/* tls_m.c - Handle tls/ssl using Mozilla NSS. */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2008-2018 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* ACKNOWLEDGEMENTS: Initial version written by Howard Chu. + * Additional support by Rich Megginson. + */ + +#include "portable.h" + +#ifdef HAVE_MOZNSS + +#include "ldap_config.h" + +#include <stdio.h> + +#if defined( HAVE_FCNTL_H ) +#include <fcntl.h> +#endif + +#include <ac/stdlib.h> +#include <ac/errno.h> +#include <ac/socket.h> +#include <ac/string.h> +#include <ac/ctype.h> +#include <ac/time.h> +#include <ac/unistd.h> +#include <ac/param.h> +#include <ac/dirent.h> +#include <ac/regex.h> + +#include "ldap-int.h" +#include "ldap-tls.h" + +#define READ_PASSWORD_FROM_STDIN +#define READ_PASSWORD_FROM_FILE + +#ifdef READ_PASSWORD_FROM_STDIN +#include <termios.h> /* for echo on/off */ +#endif + +#include <nspr/nspr.h> +#include <nspr/private/pprio.h> +#include <nss/nss.h> +#include <nss/ssl.h> +#include <nss/sslerr.h> +#include <nss/sslproto.h> +#include <nss/pk11pub.h> +#include <nss/secerr.h> +#include <nss/keyhi.h> +#include <nss/secmod.h> +#include <nss/cert.h> + +#undef NSS_VERSION_INT +#define NSS_VERSION_INT ((NSS_VMAJOR << 24) | (NSS_VMINOR << 16) | \ + (NSS_VPATCH << 8) | NSS_VBUILD) + +/* NSS 3.12.5 and later have NSS_InitContext */ +#if NSS_VERSION_INT >= 0x030c0500 +#define HAVE_NSS_INITCONTEXT 1 +#endif + +/* NSS 3.12.9 and later have SECMOD_RestartModules */ +#if NSS_VERSION_INT >= 0x030c0900 +#define HAVE_SECMOD_RESTARTMODULES 1 +#endif + +/* InitContext does not currently work in server mode */ +/* #define INITCONTEXT_HACK 1 */ + +typedef struct tlsm_ctx { + PRFileDesc *tc_model; + int tc_refcnt; + int tc_unique; /* unique number associated with this ctx */ + PRBool tc_verify_cert; + CERTCertDBHandle *tc_certdb; + PK11SlotInfo *tc_certdb_slot; + CERTCertificate *tc_certificate; + SECKEYPrivateKey *tc_private_key; + char *tc_pin_file; + struct ldaptls *tc_config; + int tc_is_server; + int tc_require_cert; + PRCallOnceType tc_callonce; + PRBool tc_using_pem; +#ifdef HAVE_NSS_INITCONTEXT + NSSInitContext *tc_initctx; /* the NSS context */ +#endif + PK11GenericObject **tc_pem_objs; /* array of objects to free */ + int tc_n_pem_objs; /* number of objects */ + PRBool tc_warn_only; /* only warn of errors in validation */ +#ifdef LDAP_R_COMPILE + ldap_pvt_thread_mutex_t tc_refmutex; +#endif +} tlsm_ctx; + +typedef PRFileDesc tlsm_session; + +static int tlsm_ctx_count; +#define TLSM_CERTDB_DESC_FMT "ldap(%d)" + +static PRDescIdentity tlsm_layer_id; + +static const PRIOMethods tlsm_PR_methods; + +#define CERTDB_NONE NULL +#define PREFIX_NONE NULL + +#define PEM_LIBRARY "nsspem" +#define PEM_MODULE "PEM" +#define PEM_CA_HASH_FILE_REGEX "^[0-9a-f]{8}\\.[0-9]+$" + +static SECMODModule *pem_module; + +#define DEFAULT_TOKEN_NAME "default" +#define TLSM_PEM_SLOT_CACERTS "PEM Token #0" +#define TLSM_PEM_SLOT_CERTS "PEM Token #1" + +#define PK11_SETATTRS(x,id,v,l) (x).type = (id); \ + (x).pValue=(v); (x).ulValueLen = (l); + +/* forward declaration */ +static int tlsm_init( void ); + +#ifdef LDAP_R_COMPILE + +/* it doesn't seem guaranteed that a client will call + tlsm_thr_init in a non-threaded context - so we have + to wrap the mutex creation in a prcallonce +*/ +static ldap_pvt_thread_mutex_t tlsm_ctx_count_mutex; +static ldap_pvt_thread_mutex_t tlsm_init_mutex; +static ldap_pvt_thread_mutex_t tlsm_pem_mutex; +static PRCallOnceType tlsm_init_mutex_callonce = {0,0}; + +static PRStatus PR_CALLBACK +tlsm_thr_init_callonce( void ) +{ + if ( ldap_pvt_thread_mutex_init( &tlsm_ctx_count_mutex ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not create mutex for context counter: %d\n", errno, 0, 0 ); + return PR_FAILURE; + } + + if ( ldap_pvt_thread_mutex_init( &tlsm_init_mutex ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not create mutex for moznss initialization: %d\n", errno, 0, 0 ); + return PR_FAILURE; + } + + if ( ldap_pvt_thread_mutex_init( &tlsm_pem_mutex ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not create mutex for PEM module: %d\n", errno, 0, 0 ); + return PR_FAILURE; + } + + return PR_SUCCESS; +} + +static void +tlsm_thr_init( void ) +{ + ( void )PR_CallOnce( &tlsm_init_mutex_callonce, tlsm_thr_init_callonce ); +} + +#endif /* LDAP_R_COMPILE */ + +static const char * +tlsm_dump_cipher_info(PRFileDesc *fd) +{ + PRUint16 ii; + + for (ii = 0; ii < SSL_NumImplementedCiphers; ++ii) { + PRInt32 cipher = (PRInt32)SSL_ImplementedCiphers[ii]; + PRBool enabled = PR_FALSE; + PRInt32 policy = 0; + SSLCipherSuiteInfo info; + + if (fd) { + SSL_CipherPrefGet(fd, cipher, &enabled); + } else { + SSL_CipherPrefGetDefault(cipher, &enabled); + } + SSL_CipherPolicyGet(cipher, &policy); + SSL_GetCipherSuiteInfo(cipher, &info, (PRUintn)sizeof(info)); + Debug( LDAP_DEBUG_TRACE, + "TLS: cipher: %d - %s, enabled: %d, ", + info.cipherSuite, info.cipherSuiteName, enabled ); + Debug( LDAP_DEBUG_TRACE, + "policy: %d\n", policy, 0, 0 ); + } + + return ""; +} + +/* Cipher definitions */ +typedef struct { + char *ossl_name; /* The OpenSSL cipher name */ + int num; /* The cipher id */ + int attr; /* cipher attributes: algorithms, etc */ + int version; /* protocol version valid for this cipher */ + int bits; /* bits of strength */ + int alg_bits; /* bits of the algorithm */ + int strength; /* LOW, MEDIUM, HIGH */ + int enabled; /* Enabled by default? */ +} cipher_properties; + +/* cipher attributes */ +#define SSL_kRSA 0x00000001L +#define SSL_aRSA 0x00000002L +#define SSL_aDSS 0x00000004L +#define SSL_DSS SSL_aDSS +#define SSL_eNULL 0x00000008L +#define SSL_DES 0x00000010L +#define SSL_3DES 0x00000020L +#define SSL_RC4 0x00000040L +#define SSL_RC2 0x00000080L +#define SSL_AES 0x00000100L +#define SSL_MD5 0x00000200L +#define SSL_SHA1 0x00000400L +#define SSL_SHA SSL_SHA1 +#define SSL_RSA (SSL_kRSA|SSL_aRSA) + +/* cipher strength */ +#define SSL_NULL 0x00000001L +#define SSL_EXPORT40 0x00000002L +#define SSL_EXPORT56 0x00000004L +#define SSL_LOW 0x00000008L +#define SSL_MEDIUM 0x00000010L +#define SSL_HIGH 0x00000020L + +#define SSL2 0x00000001L +#define SSL3 0x00000002L +/* OpenSSL treats SSL3 and TLSv1 the same */ +#define TLS1 SSL3 + +/* Cipher translation */ +static cipher_properties ciphers_def[] = { + /* SSL 2 ciphers */ + {"DES-CBC3-MD5", SSL_EN_DES_192_EDE3_CBC_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_MD5, SSL2, 168, 168, SSL_HIGH, SSL_ALLOWED}, + {"RC2-CBC-MD5", SSL_EN_RC2_128_CBC_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5, SSL2, 128, 128, SSL_MEDIUM, SSL_ALLOWED}, + {"RC4-MD5", SSL_EN_RC4_128_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL2, 128, 128, SSL_MEDIUM, SSL_ALLOWED}, + {"DES-CBC-MD5", SSL_EN_DES_64_CBC_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_DES|SSL_MD5, SSL2, 56, 56, SSL_LOW, SSL_ALLOWED}, + {"EXP-RC2-CBC-MD5", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5, SSL2, 40, 128, SSL_EXPORT40, SSL_ALLOWED}, + {"EXP-RC4-MD5", SSL_EN_RC4_128_EXPORT40_WITH_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL2, 40, 128, SSL_EXPORT40, SSL_ALLOWED}, + + /* SSL3 ciphers */ + {"RC4-MD5", SSL_RSA_WITH_RC4_128_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL3, 128, 128, SSL_MEDIUM, SSL_ALLOWED}, + {"RC4-SHA", SSL_RSA_WITH_RC4_128_SHA, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_SHA1, SSL3, 128, 128, SSL_MEDIUM, SSL_ALLOWED}, + {"DES-CBC3-SHA", SSL_RSA_WITH_3DES_EDE_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_SHA1, SSL3, 168, 168, SSL_HIGH, SSL_ALLOWED}, + {"DES-CBC-SHA", SSL_RSA_WITH_DES_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA1, SSL3, 56, 56, SSL_LOW, SSL_ALLOWED}, + {"EXP-RC4-MD5", SSL_RSA_EXPORT_WITH_RC4_40_MD5, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5, SSL3, 40, 128, SSL_EXPORT40, SSL_ALLOWED}, + {"EXP-RC2-CBC-MD5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5, SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5, SSL3, 0, 0, SSL_EXPORT40, SSL_ALLOWED}, + {"NULL-MD5", SSL_RSA_WITH_NULL_MD5, SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5, SSL3, 0, 0, SSL_NULL, SSL_NOT_ALLOWED}, + {"NULL-SHA", SSL_RSA_WITH_NULL_SHA, SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_SHA1, SSL3, 0, 0, SSL_NULL, SSL_NOT_ALLOWED}, + + /* TLSv1 ciphers */ + {"EXP1024-DES-CBC-SHA", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_DES|SSL_SHA, TLS1, 56, 56, SSL_EXPORT56, SSL_ALLOWED}, + {"EXP1024-RC4-SHA", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA, SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_SHA, TLS1, 56, 56, SSL_EXPORT56, SSL_ALLOWED}, + {"AES128-SHA", TLS_RSA_WITH_AES_128_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_AES|SSL_SHA, TLS1, 128, 128, SSL_HIGH, SSL_ALLOWED}, + {"AES256-SHA", TLS_RSA_WITH_AES_256_CBC_SHA, SSL_kRSA|SSL_aRSA|SSL_AES|SSL_SHA, TLS1, 256, 256, SSL_HIGH, SSL_ALLOWED}, +}; + +#define ciphernum (sizeof(ciphers_def)/sizeof(cipher_properties)) + +/* given err which is the current errno, calls PR_SetError with + the corresponding NSPR error code */ +static void +tlsm_map_error(int err) +{ + PRErrorCode prError; + + switch ( err ) { + case EACCES: + prError = PR_NO_ACCESS_RIGHTS_ERROR; + break; + case EADDRINUSE: + prError = PR_ADDRESS_IN_USE_ERROR; + break; + case EADDRNOTAVAIL: + prError = PR_ADDRESS_NOT_AVAILABLE_ERROR; + break; + case EAFNOSUPPORT: + prError = PR_ADDRESS_NOT_SUPPORTED_ERROR; + break; + case EAGAIN: + prError = PR_WOULD_BLOCK_ERROR; + break; + /* + * On QNX and Neutrino, EALREADY is defined as EBUSY. + */ +#if EALREADY != EBUSY + case EALREADY: + prError = PR_ALREADY_INITIATED_ERROR; + break; +#endif + case EBADF: + prError = PR_BAD_DESCRIPTOR_ERROR; + break; +#ifdef EBADMSG + case EBADMSG: + prError = PR_IO_ERROR; + break; +#endif + case EBUSY: + prError = PR_FILESYSTEM_MOUNTED_ERROR; + break; + case ECONNABORTED: + prError = PR_CONNECT_ABORTED_ERROR; + break; + case ECONNREFUSED: + prError = PR_CONNECT_REFUSED_ERROR; + break; + case ECONNRESET: + prError = PR_CONNECT_RESET_ERROR; + break; + case EDEADLK: + prError = PR_DEADLOCK_ERROR; + break; +#ifdef EDIRCORRUPTED + case EDIRCORRUPTED: + prError = PR_DIRECTORY_CORRUPTED_ERROR; + break; +#endif +#ifdef EDQUOT + case EDQUOT: + prError = PR_NO_DEVICE_SPACE_ERROR; + break; +#endif + case EEXIST: + prError = PR_FILE_EXISTS_ERROR; + break; + case EFAULT: + prError = PR_ACCESS_FAULT_ERROR; + break; + case EFBIG: + prError = PR_FILE_TOO_BIG_ERROR; + break; + case EHOSTUNREACH: + prError = PR_HOST_UNREACHABLE_ERROR; + break; + case EINPROGRESS: + prError = PR_IN_PROGRESS_ERROR; + break; + case EINTR: + prError = PR_PENDING_INTERRUPT_ERROR; + break; + case EINVAL: + prError = PR_INVALID_ARGUMENT_ERROR; + break; + case EIO: + prError = PR_IO_ERROR; + break; + case EISCONN: + prError = PR_IS_CONNECTED_ERROR; + break; + case EISDIR: + prError = PR_IS_DIRECTORY_ERROR; + break; + case ELOOP: + prError = PR_LOOP_ERROR; + break; + case EMFILE: + prError = PR_PROC_DESC_TABLE_FULL_ERROR; + break; + case EMLINK: + prError = PR_MAX_DIRECTORY_ENTRIES_ERROR; + break; + case EMSGSIZE: + prError = PR_INVALID_ARGUMENT_ERROR; + break; +#ifdef EMULTIHOP + case EMULTIHOP: + prError = PR_REMOTE_FILE_ERROR; + break; +#endif + case ENAMETOOLONG: + prError = PR_NAME_TOO_LONG_ERROR; + break; + case ENETUNREACH: + prError = PR_NETWORK_UNREACHABLE_ERROR; + break; + case ENFILE: + prError = PR_SYS_DESC_TABLE_FULL_ERROR; + break; + /* + * On SCO OpenServer 5, ENOBUFS is defined as ENOSR. + */ +#if defined(ENOBUFS) && (ENOBUFS != ENOSR) + case ENOBUFS: + prError = PR_INSUFFICIENT_RESOURCES_ERROR; + break; +#endif + case ENODEV: + prError = PR_FILE_NOT_FOUND_ERROR; + break; + case ENOENT: + prError = PR_FILE_NOT_FOUND_ERROR; + break; + case ENOLCK: + prError = PR_FILE_IS_LOCKED_ERROR; + break; +#ifdef ENOLINK + case ENOLINK: + prError = PR_REMOTE_FILE_ERROR; + break; +#endif + case ENOMEM: + prError = PR_OUT_OF_MEMORY_ERROR; + break; + case ENOPROTOOPT: + prError = PR_INVALID_ARGUMENT_ERROR; + break; + case ENOSPC: + prError = PR_NO_DEVICE_SPACE_ERROR; + break; +#ifdef ENOSR + case ENOSR: + prError = PR_INSUFFICIENT_RESOURCES_ERROR; + break; +#endif + case ENOTCONN: + prError = PR_NOT_CONNECTED_ERROR; + break; + case ENOTDIR: + prError = PR_NOT_DIRECTORY_ERROR; + break; + case ENOTSOCK: + prError = PR_NOT_SOCKET_ERROR; + break; + case ENXIO: + prError = PR_FILE_NOT_FOUND_ERROR; + break; + case EOPNOTSUPP: + prError = PR_NOT_TCP_SOCKET_ERROR; + break; +#ifdef EOVERFLOW + case EOVERFLOW: + prError = PR_BUFFER_OVERFLOW_ERROR; + break; +#endif + case EPERM: + prError = PR_NO_ACCESS_RIGHTS_ERROR; + break; + case EPIPE: + prError = PR_CONNECT_RESET_ERROR; + break; +#ifdef EPROTO + case EPROTO: + prError = PR_IO_ERROR; + break; +#endif + case EPROTONOSUPPORT: + prError = PR_PROTOCOL_NOT_SUPPORTED_ERROR; + break; + case EPROTOTYPE: + prError = PR_ADDRESS_NOT_SUPPORTED_ERROR; + break; + case ERANGE: + prError = PR_INVALID_METHOD_ERROR; + break; + case EROFS: + prError = PR_READ_ONLY_FILESYSTEM_ERROR; + break; + case ESPIPE: + prError = PR_INVALID_METHOD_ERROR; + break; + case ETIMEDOUT: + prError = PR_IO_TIMEOUT_ERROR; + break; +#if EWOULDBLOCK != EAGAIN + case EWOULDBLOCK: + prError = PR_WOULD_BLOCK_ERROR; + break; +#endif + case EXDEV: + prError = PR_NOT_SAME_DEVICE_ERROR; + break; + default: + prError = PR_UNKNOWN_ERROR; + break; + } + PR_SetError( prError, err ); +} + +/* + * cipher_list is an integer array with the following values: + * -1: never enable this cipher + * 0: cipher disabled + * 1: cipher enabled + */ +static int +nss_parse_ciphers(const char *cipherstr, int cipher_list[ciphernum]) +{ + int i; + char *cipher; + char *ciphers; + char *ciphertip; + int action; + int rv; + + /* All disabled to start */ + for (i=0; i<ciphernum; i++) + cipher_list[i] = 0; + + ciphertip = strdup(cipherstr); + cipher = ciphers = ciphertip; + + while (ciphers && (strlen(ciphers))) { + while ((*cipher) && (isspace(*cipher))) + ++cipher; + + action = 1; + switch(*cipher) { + case '+': /* Add something */ + action = 1; + cipher++; + break; + case '-': /* Subtract something */ + action = 0; + cipher++; + break; + case '!': /* Disable something */ + action = -1; + cipher++; + break; + default: + /* do nothing */ + break; + } + + if ((ciphers = strchr(cipher, ':'))) { + *ciphers++ = '\0'; + } + + /* Do the easy one first */ + if (!strcmp(cipher, "ALL")) { + for (i=0; i<ciphernum; i++) { + if (!(ciphers_def[i].attr & SSL_eNULL)) + cipher_list[i] = action; + } + } else if (!strcmp(cipher, "COMPLEMENTOFALL")) { + for (i=0; i<ciphernum; i++) { + if ((ciphers_def[i].attr & SSL_eNULL)) + cipher_list[i] = action; + } + } else if (!strcmp(cipher, "DEFAULT")) { + for (i=0; i<ciphernum; i++) { + cipher_list[i] = ciphers_def[i].enabled == SSL_ALLOWED ? 1 : 0; + } + } else { + int mask = 0; + int strength = 0; + int protocol = 0; + char *c; + + c = cipher; + while (c && (strlen(c))) { + + if ((c = strchr(cipher, '+'))) { + *c++ = '\0'; + } + + if (!strcmp(cipher, "RSA")) { + mask |= SSL_RSA; + } else if ((!strcmp(cipher, "NULL")) || (!strcmp(cipher, "eNULL"))) { + mask |= SSL_eNULL; + } else if (!strcmp(cipher, "AES")) { + mask |= SSL_AES; + } else if (!strcmp(cipher, "3DES")) { + mask |= SSL_3DES; + } else if (!strcmp(cipher, "DES")) { + mask |= SSL_DES; + } else if (!strcmp(cipher, "RC4")) { + mask |= SSL_RC4; + } else if (!strcmp(cipher, "RC2")) { + mask |= SSL_RC2; + } else if (!strcmp(cipher, "MD5")) { + mask |= SSL_MD5; + } else if ((!strcmp(cipher, "SHA")) || (!strcmp(cipher, "SHA1"))) { + mask |= SSL_SHA1; + } else if (!strcmp(cipher, "SSLv2")) { + protocol |= SSL2; + } else if (!strcmp(cipher, "SSLv3")) { + protocol |= SSL3; + } else if (!strcmp(cipher, "TLSv1")) { + protocol |= TLS1; + } else if (!strcmp(cipher, "HIGH")) { + strength |= SSL_HIGH; + } else if (!strcmp(cipher, "MEDIUM")) { + strength |= SSL_MEDIUM; + } else if (!strcmp(cipher, "LOW")) { + strength |= SSL_LOW; + } else if ((!strcmp(cipher, "EXPORT")) || (!strcmp(cipher, "EXP"))) { + strength |= SSL_EXPORT40|SSL_EXPORT56; + } else if (!strcmp(cipher, "EXPORT40")) { + strength |= SSL_EXPORT40; + } else if (!strcmp(cipher, "EXPORT56")) { + strength |= SSL_EXPORT56; + } + + if (c) + cipher = c; + + } /* while */ + + /* If we have a mask, apply it. If not then perhaps they provided + * a specific cipher to enable. + */ + if (mask || strength || protocol) { + for (i=0; i<ciphernum; i++) { + if (((ciphers_def[i].attr & mask) || + (ciphers_def[i].strength & strength) || + (ciphers_def[i].version & protocol)) && + (cipher_list[i] != -1)) { + /* Enable the NULL ciphers only if explicity + * requested */ + if (ciphers_def[i].attr & SSL_eNULL) { + if (mask & SSL_eNULL) + cipher_list[i] = action; + } else + cipher_list[i] = action; + } + } + } else { + for (i=0; i<ciphernum; i++) { + if (!strcmp(ciphers_def[i].ossl_name, cipher) && + cipher_list[i] != -1) + cipher_list[i] = action; + } + } + } + + if (ciphers) + cipher = ciphers; + } + + /* See if any ciphers were enabled */ + rv = 0; + for (i=0; i<ciphernum; i++) { + if (cipher_list[i] == 1) + rv = 1; + } + + free(ciphertip); + + return rv; +} + +static int +tlsm_parse_ciphers(tlsm_ctx *ctx, const char *str) +{ + int cipher_state[ciphernum]; + int rv, i; + + if (!ctx) + return 0; + + rv = nss_parse_ciphers(str, cipher_state); + + if (rv) { + /* First disable everything */ + for (i = 0; i < SSL_NumImplementedCiphers; i++) + SSL_CipherPrefSet(ctx->tc_model, SSL_ImplementedCiphers[i], SSL_NOT_ALLOWED); + + /* Now enable what was requested */ + for (i=0; i<ciphernum; i++) { + SSLCipherSuiteInfo suite; + PRBool enabled; + + if (SSL_GetCipherSuiteInfo(ciphers_def[i].num, &suite, sizeof suite) + == SECSuccess) { + enabled = cipher_state[i] < 0 ? 0 : cipher_state[i]; + if (enabled == SSL_ALLOWED) { + if (PK11_IsFIPS() && !suite.isFIPS) + enabled = SSL_NOT_ALLOWED; + } + SSL_CipherPrefSet(ctx->tc_model, ciphers_def[i].num, enabled); + } + } + } + + return rv == 1 ? 0 : -1; +} + +static SECStatus +tlsm_bad_cert_handler(void *arg, PRFileDesc *ssl) +{ + SECStatus success = SECSuccess; + PRErrorCode err; + tlsm_ctx *ctx = (tlsm_ctx *)arg; + + if (!ssl || !ctx) { + return SECFailure; + } + + err = PORT_GetError(); + + switch (err) { + case SEC_ERROR_UNTRUSTED_ISSUER: + case SEC_ERROR_UNKNOWN_ISSUER: + case SEC_ERROR_EXPIRED_CERTIFICATE: + case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE: + if (ctx->tc_verify_cert) { + success = SECFailure; + } + break; + /* we bypass NSS's hostname checks and do our own */ + case SSL_ERROR_BAD_CERT_DOMAIN: + break; + default: + success = SECFailure; + break; + } + + return success; +} + +static const char * +tlsm_dump_security_status(PRFileDesc *fd) +{ + char * cp; /* bulk cipher name */ + char * ip; /* cert issuer DN */ + char * sp; /* cert subject DN */ + int op; /* High, Low, Off */ + int kp0; /* total key bits */ + int kp1; /* secret key bits */ + SSL3Statistics * ssl3stats = SSL_GetStatistics(); + + SSL_SecurityStatus( fd, &op, &cp, &kp0, &kp1, &ip, &sp ); + Debug( LDAP_DEBUG_TRACE, + "TLS certificate verification: subject: %s, issuer: %s, cipher: %s, ", + sp ? sp : "-unknown-", ip ? ip : "-unknown-", cp ? cp : "-unknown-" ); + PR_Free(cp); + PR_Free(ip); + PR_Free(sp); + Debug( LDAP_DEBUG_TRACE, + "security level: %s, secret key bits: %d, total key bits: %d, ", + ((op == SSL_SECURITY_STATUS_ON_HIGH) ? "high" : + ((op == SSL_SECURITY_STATUS_ON_LOW) ? "low" : "off")), + kp1, kp0 ); + + Debug( LDAP_DEBUG_TRACE, + "cache hits: %ld, cache misses: %ld, cache not reusable: %ld\n", + ssl3stats->hch_sid_cache_hits, ssl3stats->hch_sid_cache_misses, + ssl3stats->hch_sid_cache_not_ok ); + + return ""; +} + +static void +tlsm_handshake_complete_cb( PRFileDesc *fd, void *client_data ) +{ + tlsm_dump_security_status( fd ); +} + +#ifdef READ_PASSWORD_FROM_FILE +static char * +tlsm_get_pin_from_file(const char *token_name, tlsm_ctx *ctx) +{ + char *pwdstr = NULL; + char *contents = NULL; + char *lasts = NULL; + char *line = NULL; + char *candidate = NULL; + PRFileInfo file_info; + PRFileDesc *pwd_fileptr = PR_Open( ctx->tc_pin_file, PR_RDONLY, 00400 ); + + /* open the password file */ + if ( !pwd_fileptr ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not open security pin file %s - error %d:%s.\n", + ctx->tc_pin_file, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + goto done; + } + + /* get the file size */ + if ( PR_SUCCESS != PR_GetFileInfo( ctx->tc_pin_file, &file_info ) ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not get file info from pin file %s - error %d:%s.\n", + ctx->tc_pin_file, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + goto done; + } + + /* create a buffer to hold the file contents */ + if ( !( contents = PR_CALLOC( file_info.size + 1 ) ) ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not alloc a buffer for contents of pin file %s - error %d:%s.\n", + ctx->tc_pin_file, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + goto done; + } + + /* read file into the buffer */ + if( PR_Read( pwd_fileptr, contents, file_info.size ) <= 0 ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not read the file contents from pin file %s - error %d:%s.\n", + ctx->tc_pin_file, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + goto done; + } + + /* format is [tokenname:]password EOL [tokenname:]password EOL ... */ + /* if you want to use a password containing a colon character, use + the special tokenname "default" */ + for ( line = PL_strtok_r( contents, "\r\n", &lasts ); line; + line = PL_strtok_r( NULL, "\r\n", &lasts ) ) { + char *colon; + + if ( !*line ) { + continue; /* skip blank lines */ + } + colon = PL_strchr( line, ':' ); + if ( colon ) { + if ( *(colon + 1) && token_name && + !PL_strncmp( token_name, line, colon-line ) ) { + candidate = colon + 1; /* found a definite match */ + break; + } else if ( !PL_strncmp( DEFAULT_TOKEN_NAME, line, colon-line ) ) { + candidate = colon + 1; /* found possible match */ + } + } else { /* no token name */ + candidate = line; + } + } +done: + if ( pwd_fileptr ) { + PR_Close( pwd_fileptr ); + } + if ( candidate ) { + pwdstr = PL_strdup( candidate ); + } + PL_strfree( contents ); + + return pwdstr; +} +#endif /* READ_PASSWORD_FROM_FILE */ + +#ifdef READ_PASSWORD_FROM_STDIN +/* + * Turn the echoing off on a tty. + */ +static void +echoOff(int fd) +{ + if ( isatty( fd ) ) { + struct termios tio; + tcgetattr( fd, &tio ); + tio.c_lflag &= ~ECHO; + tcsetattr( fd, TCSAFLUSH, &tio ); + } +} + +/* + * Turn the echoing on on a tty. + */ +static void +echoOn(int fd) +{ + if ( isatty( fd ) ) { + struct termios tio; + tcgetattr( fd, &tio ); + tio.c_lflag |= ECHO; + tcsetattr( fd, TCSAFLUSH, &tio ); + tcsetattr( fd, TCSAFLUSH, &tio ); + } +} +#endif /* READ_PASSWORD_FROM_STDIN */ + +/* + * This does the actual work of reading the pin/password/pass phrase + */ +static char * +tlsm_get_pin(PK11SlotInfo *slot, PRBool retry, tlsm_ctx *ctx) +{ + char *token_name = NULL; + char *pwdstr = NULL; + + token_name = PK11_GetTokenName( slot ); +#ifdef READ_PASSWORD_FROM_FILE + /* Try to get the passwords from the password file if it exists. + * THIS IS UNSAFE and is provided for convenience only. Without this + * capability the server would have to be started in foreground mode + * if using an encrypted key. + */ + if ( ctx && ctx->tc_pin_file ) { + pwdstr = tlsm_get_pin_from_file( token_name, ctx ); + if ( retry && pwdstr != NULL ) + return NULL; + } +#endif /* RETRIEVE_PASSWORD_FROM_FILE */ +#ifdef READ_PASSWORD_FROM_STDIN + if ( !pwdstr ) { + int infd = PR_FileDesc2NativeHandle( PR_STDIN ); + int isTTY = isatty( infd ); + unsigned char phrase[200]; + /* Prompt for password */ + if ( isTTY ) { + fprintf( stdout, + "Please enter pin, password, or pass phrase for security token '%s': ", + token_name ? token_name : DEFAULT_TOKEN_NAME ); + echoOff( infd ); + } + fgets( (char*)phrase, sizeof(phrase), stdin ); + if ( isTTY ) { + fprintf( stdout, "\n" ); + echoOn( infd ); + } + /* stomp on newline */ + phrase[strlen((char*)phrase)-1] = 0; + + pwdstr = PL_strdup( (char*)phrase ); + } + +#endif /* READ_PASSWORD_FROM_STDIN */ + return pwdstr; +} + +/* + * PKCS11 devices (including the internal softokn cert/key database) + * may be protected by a pin or password or even pass phrase + * MozNSS needs a way for the user to provide that + */ +static char * +tlsm_pin_prompt(PK11SlotInfo *slot, PRBool retry, void *arg) +{ + tlsm_ctx *ctx = (tlsm_ctx *)arg; + + return tlsm_get_pin( slot, retry, ctx ); +} + +static char * +tlsm_ctx_subject_name(tlsm_ctx *ctx) +{ + if ( !ctx || !ctx->tc_certificate ) + return "(unknown)"; + + return ctx->tc_certificate->subjectName; +} + +static SECStatus +tlsm_get_basic_constraint_extension( CERTCertificate *cert, + CERTBasicConstraints *cbcval ) +{ + SECItem encodedVal = { 0, NULL }; + SECStatus rc; + + rc = CERT_FindCertExtension( cert, SEC_OID_X509_BASIC_CONSTRAINTS, + &encodedVal); + if ( rc != SECSuccess ) { + return rc; + } + + rc = CERT_DecodeBasicConstraintValue( cbcval, &encodedVal ); + + /* free the raw extension data */ + PORT_Free( encodedVal.data ); + + return rc; +} + +static PRBool +tlsm_cert_is_self_issued( CERTCertificate *cert ) +{ + /* A cert is self-issued if its subject and issuer are equal and + * both are of non-zero length. + */ + PRBool is_self_issued = cert && + (PRBool)SECITEM_ItemsAreEqual( &cert->derIssuer, + &cert->derSubject ) && + cert->derSubject.len > 0; + return is_self_issued; +} + +/* + * The private key for used certificate can be already unlocked by other + * thread or library. Find the unlocked key if possible. + */ +static SECKEYPrivateKey * +tlsm_find_unlocked_key( tlsm_ctx *ctx, void *pin_arg ) +{ + SECKEYPrivateKey *result = NULL; + + PK11SlotList *slots = PK11_GetAllSlotsForCert( ctx->tc_certificate, NULL ); + if ( !slots ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: cannot get all slots for certificate '%s' (error %d: %s)", + tlsm_ctx_subject_name( ctx ), errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + return result; + } + + PK11SlotListElement *le; + for ( le = slots->head; le; le = le->next ) { + PK11SlotInfo *slot = le->slot; + if ( PK11_IsLoggedIn( slot, NULL ) ) { + result = PK11_FindKeyByDERCert( slot, ctx->tc_certificate, pin_arg ); + break; + } + } + + PK11_FreeSlotList( slots ); + return result; +} + +static SECStatus +tlsm_verify_cert(CERTCertDBHandle *handle, CERTCertificate *cert, void *pinarg, + PRBool checksig, SECCertificateUsage certUsage, PRBool warn_only, + PRBool ignore_issuer ) +{ + CERTVerifyLog verifylog; + SECStatus ret = SECSuccess; + const char *name; + int debug_level = LDAP_DEBUG_ANY; + + if ( warn_only ) { + debug_level = LDAP_DEBUG_TRACE; + } + + /* the log captures information about every cert in the chain, so we can tell + which cert caused the problem and what the problem was */ + memset( &verifylog, 0, sizeof( verifylog ) ); + verifylog.arena = PORT_NewArena( DER_DEFAULT_CHUNKSIZE ); + if ( verifylog.arena == NULL ) { + Debug( LDAP_DEBUG_ANY, + "TLS certificate verification: Out of memory for certificate verification logger\n", + 0, 0, 0 ); + return SECFailure; + } + ret = CERT_VerifyCertificate( handle, cert, checksig, certUsage, PR_Now(), pinarg, &verifylog, + NULL ); + if ( ( name = cert->subjectName ) == NULL ) { + name = cert->nickname; + } + if ( verifylog.head == NULL ) { + /* it is possible for CERT_VerifyCertificate return with an error with no logging */ + if ( ret != SECSuccess ) { + PRErrorCode errcode = PR_GetError(); + Debug( debug_level, + "TLS: certificate [%s] is not valid - error %d:%s.\n", + name ? name : "(unknown)", + errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + } + } else { + const char *name; + CERTVerifyLogNode *node; + + ret = SECSuccess; /* reset */ + node = verifylog.head; + while ( node ) { + if ( ( name = node->cert->subjectName ) == NULL ) { + name = node->cert->nickname; + } + if ( node->error ) { + /* NSS does not like CA certs that have the basic constraints extension + with the CA flag set to FALSE - openssl doesn't check if the cert + is self issued */ + if ( ( node->error == SEC_ERROR_CA_CERT_INVALID ) && + tlsm_cert_is_self_issued( node->cert ) ) { + + PRErrorCode orig_error = PR_GetError(); + PRInt32 orig_oserror = PR_GetOSError(); + + CERTBasicConstraints basicConstraint; + SECStatus rv = tlsm_get_basic_constraint_extension( node->cert, &basicConstraint ); + if ( ( rv == SECSuccess ) && ( basicConstraint.isCA == PR_FALSE ) ) { + Debug( LDAP_DEBUG_TRACE, + "TLS: certificate [%s] is not correct because it is a CA cert and the " + "BasicConstraint CA flag is set to FALSE - allowing for now, but " + "please fix your certs if possible\n", name, 0, 0 ); + } else { /* does not have basicconstraint, or some other error */ + ret = SECFailure; + Debug( debug_level, + "TLS: certificate [%s] is not valid - CA cert is not valid\n", + name, 0, 0 ); + } + + PR_SetError( orig_error, orig_oserror ); + + } else if ( warn_only || ( ignore_issuer && ( + node->error == SEC_ERROR_UNKNOWN_ISSUER || + node->error == SEC_ERROR_UNTRUSTED_ISSUER ) + ) ) { + ret = SECSuccess; + Debug( debug_level, + "TLS: Warning: ignoring error for certificate [%s] - error %ld:%s.\n", + name, node->error, PR_ErrorToString( node->error, PR_LANGUAGE_I_DEFAULT ) ); + } else { + ret = SECFailure; + Debug( debug_level, + "TLS: certificate [%s] is not valid - error %ld:%s.\n", + name, node->error, PR_ErrorToString( node->error, PR_LANGUAGE_I_DEFAULT ) ); + } + } + CERT_DestroyCertificate( node->cert ); + node = node->next; + } + } + + PORT_FreeArena( verifylog.arena, PR_FALSE ); + + if ( ret == SECSuccess ) { + Debug( LDAP_DEBUG_TRACE, + "TLS: certificate [%s] is valid\n", name, 0, 0 ); + } + + return ret; +} + +static SECStatus +tlsm_auth_cert_handler(void *arg, PRFileDesc *fd, + PRBool checksig, PRBool isServer) +{ + SECCertificateUsage certUsage = isServer ? certificateUsageSSLClient : certificateUsageSSLServer; + SECStatus ret = SECSuccess; + CERTCertificate *peercert = SSL_PeerCertificate( fd ); + tlsm_ctx *ctx = (tlsm_ctx *)arg; + + ret = tlsm_verify_cert( ctx->tc_certdb, peercert, + SSL_RevealPinArg( fd ), + checksig, certUsage, ctx->tc_warn_only, PR_FALSE ); + CERT_DestroyCertificate( peercert ); + + return ret; +} + +static PRCallOnceType tlsm_register_shutdown_callonce = {0,0}; + +static SECStatus +tlsm_nss_shutdown_cb( void *appData, void *nssData ) +{ + SECStatus rc = SECSuccess; + + SSL_ShutdownServerSessionIDCache(); + + if ( pem_module ) { + SECMOD_UnloadUserModule( pem_module ); + SECMOD_DestroyModule( pem_module ); + pem_module = NULL; + } + + /* init callonce so it can be armed again for cases like persistent daemon with LDAP_OPT_X_TLS_NEWCTX */ + tlsm_register_shutdown_callonce.initialized = 0; + tlsm_register_shutdown_callonce.inProgress = 0; + tlsm_register_shutdown_callonce.status = 0; + + return rc; +} + +static PRStatus PR_CALLBACK +tlsm_register_nss_shutdown_cb( void ) +{ + if ( SECSuccess == NSS_RegisterShutdown( tlsm_nss_shutdown_cb, + NULL ) ) { + return PR_SUCCESS; + } + return PR_FAILURE; +} + +static PRStatus +tlsm_register_nss_shutdown( void ) +{ + return PR_CallOnce( &tlsm_register_shutdown_callonce, + tlsm_register_nss_shutdown_cb ); +} + +static int +tlsm_init_pem_module( void ) +{ + int rc = 0; + char *fullname = NULL; + char *configstring = NULL; + + if ( pem_module ) { + return rc; + } + + /* not loaded - load it */ + /* get the system dependent library name */ + fullname = PR_GetLibraryName( NULL, PEM_LIBRARY ); + /* Load our PKCS#11 module */ + configstring = PR_smprintf( "library=%s name=" PEM_MODULE " parameters=\"\"", fullname ); + PL_strfree( fullname ); + + pem_module = SECMOD_LoadUserModule( configstring, NULL, PR_FALSE ); + PR_smprintf_free( configstring ); + + if ( !pem_module || !pem_module->loaded ) { + if ( pem_module ) { + SECMOD_DestroyModule( pem_module ); + pem_module = NULL; + } + rc = -1; + } + + return rc; +} + +static void +tlsm_add_pem_obj( tlsm_ctx *ctx, PK11GenericObject *obj ) +{ + int idx = ctx->tc_n_pem_objs; + ctx->tc_n_pem_objs++; + ctx->tc_pem_objs = (PK11GenericObject **) + PORT_Realloc( ctx->tc_pem_objs, ctx->tc_n_pem_objs * sizeof( PK11GenericObject * ) ); + ctx->tc_pem_objs[idx] = obj; +} + +static void +tlsm_free_pem_objs( tlsm_ctx *ctx ) +{ + /* free in reverse order of allocation */ + while ( ctx->tc_n_pem_objs-- ) { + PK11_DestroyGenericObject( ctx->tc_pem_objs[ctx->tc_n_pem_objs] ); + ctx->tc_pem_objs[ctx->tc_n_pem_objs] = NULL; + } + PORT_Free(ctx->tc_pem_objs); + ctx->tc_pem_objs = NULL; + ctx->tc_n_pem_objs = 0; +} + +static int +tlsm_add_cert_from_file( tlsm_ctx *ctx, const char *filename, PRBool isca ) +{ + PK11SlotInfo *slot; + PK11GenericObject *cert; + CK_ATTRIBUTE attrs[4]; + CK_BBOOL cktrue = CK_TRUE; + CK_BBOOL ckfalse = CK_FALSE; + CK_OBJECT_CLASS objClass = CKO_CERTIFICATE; + char *slotname; + PRFileInfo fi; + PRStatus status; + SECItem certDER = { 0, NULL, 0 }; + + memset( &fi, 0, sizeof(fi) ); + status = PR_GetFileInfo( filename, &fi ); + if ( PR_SUCCESS != status) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not read certificate file %s - error %d:%s.\n", + filename, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + return -1; + } + + if ( fi.type != PR_FILE_FILE ) { + PR_SetError(PR_IS_DIRECTORY_ERROR, 0); + Debug( LDAP_DEBUG_ANY, + "TLS: error: the certificate file %s is not a file.\n", + filename, 0 ,0 ); + return -1; + } + + slotname = isca ? TLSM_PEM_SLOT_CACERTS : TLSM_PEM_SLOT_CERTS; + slot = PK11_FindSlotByName( slotname ); + + if ( !slot ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not find the slot for the certificate '%s' - error %d:%s.\n", + filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + return -1; + } + + PK11_SETATTRS( attrs[0], CKA_CLASS, &objClass, sizeof( objClass ) ); + PK11_SETATTRS( attrs[1], CKA_TOKEN, &cktrue, sizeof( CK_BBOOL ) ); + PK11_SETATTRS( attrs[2], CKA_LABEL, (unsigned char *) filename, strlen( filename ) + 1 ); + PK11_SETATTRS( attrs[3], CKA_TRUST, isca ? &cktrue : &ckfalse, sizeof( CK_BBOOL ) ); + + cert = PK11_CreateGenericObject( slot, attrs, 4, PR_FALSE /* isPerm */ ); + + if ( !cert ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not add the certificate '%s' - error %d:%s.\n", + filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + PK11_FreeSlot( slot ); + return -1; + } + + /* if not CA, we store the certificate in ctx->tc_certificate */ + if ( !isca ) { + if ( PK11_ReadRawAttribute( PK11_TypeGeneric, cert, CKA_VALUE, &certDER ) != SECSuccess ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not get DER of the '%s' certificate - error %d:%s.\n", + filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + PK11_DestroyGenericObject( cert ); + PK11_FreeSlot( slot ); + return -1; + } + + ctx->tc_certificate = PK11_FindCertFromDERCertItem( slot, &certDER, NULL ); + SECITEM_FreeItem( &certDER, PR_FALSE ); + + if ( !ctx->tc_certificate ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not get certificate '%s' using DER - error %d:%s.\n", + filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + PK11_DestroyGenericObject( cert ); + PK11_FreeSlot( slot ); + return -1; + } + } + + tlsm_add_pem_obj( ctx, cert ); + + PK11_FreeSlot( slot ); + + return 0; +} + +static int +tlsm_ctx_load_private_key( tlsm_ctx *ctx ) +{ + if ( !ctx->tc_certificate ) + return -1; + + if ( ctx->tc_private_key ) + return 0; + + void *pin_arg = SSL_RevealPinArg( ctx->tc_model ); + + SECKEYPrivateKey *unlocked_key = tlsm_find_unlocked_key( ctx, pin_arg ); + Debug( LDAP_DEBUG_ANY, + "TLS: %s unlocked certificate for certificate '%s'.\n", + unlocked_key ? "found" : "no", tlsm_ctx_subject_name( ctx ), 0 ); + + /* prefer unlocked key, then key from opened certdb, then any other */ + if ( unlocked_key ) + ctx->tc_private_key = unlocked_key; + else if ( ctx->tc_certdb_slot && !ctx->tc_using_pem ) + ctx->tc_private_key = PK11_FindKeyByDERCert( ctx->tc_certdb_slot, ctx->tc_certificate, pin_arg ); + else + ctx->tc_private_key = PK11_FindKeyByAnyCert( ctx->tc_certificate, pin_arg ); + + if ( !ctx->tc_private_key ) { + PRErrorCode errcode = PR_GetError(); + Debug(LDAP_DEBUG_ANY, + "TLS: cannot find private key for certificate '%s' (error %d: %s)", + tlsm_ctx_subject_name( ctx ), errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + return -1; + } + + return 0; +} + +static int +tlsm_add_key_from_file( tlsm_ctx *ctx, const char *filename ) +{ + PK11SlotInfo * slot = NULL; + PK11GenericObject *key; + CK_ATTRIBUTE attrs[3]; + CK_BBOOL cktrue = CK_TRUE; + CK_OBJECT_CLASS objClass = CKO_PRIVATE_KEY; + int retcode = 0; + PRFileInfo fi; + PRStatus status; + + memset( &fi, 0, sizeof(fi) ); + status = PR_GetFileInfo( filename, &fi ); + if ( PR_SUCCESS != status) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not read key file %s - error %d:%s.\n", + filename, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + return -1; + } + + if ( fi.type != PR_FILE_FILE ) { + PR_SetError(PR_IS_DIRECTORY_ERROR, 0); + Debug( LDAP_DEBUG_ANY, + "TLS: error: the key file %s is not a file.\n", + filename, 0 ,0 ); + return -1; + } + + slot = PK11_FindSlotByName( TLSM_PEM_SLOT_CERTS ); + + if ( !slot ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not find the slot for the private key '%s' - error %d:%s.\n", + filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + return -1; + } + + PK11_SETATTRS( attrs[0], CKA_CLASS, &objClass, sizeof( objClass ) ); + PK11_SETATTRS( attrs[1], CKA_TOKEN, &cktrue, sizeof( CK_BBOOL ) ); + PK11_SETATTRS( attrs[2], CKA_LABEL, (unsigned char *)filename, strlen( filename ) + 1 ); + + key = PK11_CreateGenericObject( slot, attrs, 3, PR_FALSE /* isPerm */ ); + + if ( !key ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not add the private key '%s' - error %d:%s.\n", + filename, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + retcode = -1; + } else { + tlsm_add_pem_obj( ctx, key ); + retcode = 0; + + /* When adding an encrypted key the PKCS#11 will be set as removed */ + /* This will force the token to be seen as re-inserted */ + SECMOD_WaitForAnyTokenEvent( pem_module, 0, 0 ); + PK11_IsPresent( slot ); + } + + PK11_FreeSlot( slot ); + + return retcode; +} + +static int +tlsm_init_ca_certs( tlsm_ctx *ctx, const char *cacertfile, const char *cacertdir ) +{ + PRBool isca = PR_TRUE; + PRStatus status = PR_SUCCESS; + PRErrorCode errcode = PR_SUCCESS; + + if ( !cacertfile && !cacertdir ) { + /* no checking - not good, but allowed */ + return 0; + } + + if ( cacertfile ) { + int rc = tlsm_add_cert_from_file( ctx, cacertfile, isca ); + if ( rc ) { + errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: %s is not a valid CA certificate file - error %d:%s.\n", + cacertfile, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + /* failure with cacertfile is a hard failure even if cacertdir is + also specified and contains valid CA cert files */ + status = PR_FAILURE; + } else { + Debug( LDAP_DEBUG_TRACE, + "TLS: loaded CA certificate file %s.\n", + cacertfile, 0, 0 ); + } + } + + /* if cacertfile above failed, we will return failure, even + if there is a valid CA cert in cacertdir - but we still + process cacertdir in case the user has enabled trace level + debugging so they can see the processing for cacertdir too */ + /* any cacertdir failures are "soft" failures - if the user specifies + no cert checking, then we allow the tls/ssl to continue, no matter + what was specified for cacertdir, or the contents of the directory + - this is different behavior than that of cacertfile */ + if ( cacertdir ) { + PRFileInfo fi; + PRDir *dir; + PRDirEntry *entry; + PRStatus fistatus = PR_FAILURE; + regex_t hashfile_re; + + memset( &fi, 0, sizeof(fi) ); + fistatus = PR_GetFileInfo( cacertdir, &fi ); + if ( PR_SUCCESS != fistatus) { + errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not get info about the CA certificate directory %s - error %d:%s.\n", + cacertdir, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + goto done; + } + + if ( fi.type != PR_FILE_DIRECTORY ) { + Debug( LDAP_DEBUG_ANY, + "TLS: error: the CA certificate directory %s is not a directory.\n", + cacertdir, 0 ,0 ); + goto done; + } + + dir = PR_OpenDir( cacertdir ); + if ( NULL == dir ) { + errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not open the CA certificate directory %s - error %d:%s.\n", + cacertdir, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + goto done; + } + + if ( regcomp( &hashfile_re, PEM_CA_HASH_FILE_REGEX, REG_NOSUB|REG_EXTENDED ) != 0 ) { + Debug( LDAP_DEBUG_ANY, "TLS: cannot compile regex for CA hash files matching\n", 0, 0, 0 ); + goto done; + } + + do { + entry = PR_ReadDir( dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN ); + if ( ( NULL != entry ) && ( NULL != entry->name ) ) { + char *fullpath = NULL; + int match; + + match = regexec( &hashfile_re, entry->name, 0, NULL, 0 ); + if ( match == REG_NOMATCH ) { + Debug( LDAP_DEBUG_TRACE, + "TLS: skipping '%s' - filename does not have expected format " + "(certificate hash with numeric suffix)\n", entry->name, 0, 0 ); + continue; + } else if ( match != 0 ) { + Debug( LDAP_DEBUG_ANY, + "TLS: cannot execute regex for CA hash file matching (%d).\n", + match, 0, 0 ); + continue; + } + + fullpath = PR_smprintf( "%s/%s", cacertdir, entry->name ); + if ( !tlsm_add_cert_from_file( ctx, fullpath, isca ) ) { + Debug( LDAP_DEBUG_TRACE, + "TLS: loaded CA certificate file %s from CA certificate directory %s.\n", + fullpath, cacertdir, 0 ); + } else { + errcode = PR_GetError(); + Debug( LDAP_DEBUG_TRACE, + "TLS: %s is not a valid CA certificate file - error %d:%s.\n", + fullpath, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + } + PR_smprintf_free( fullpath ); + } + } while ( NULL != entry ); + regfree ( &hashfile_re ); + PR_CloseDir( dir ); + } +done: + if ( status != PR_SUCCESS ) { + return -1; + } + + return 0; +} + +/* + * NSS supports having multiple cert/key databases in the same + * directory, each one having a unique string prefix e.g. + * slapd-01-cert8.db - the prefix here is "slapd-01-" + * this function examines the given certdir - if it looks like + * /path/to/directory/prefix it will return the + * /path/to/directory part in realcertdir, and the prefix in prefix + */ +static void +tlsm_get_certdb_prefix( const char *certdir, char **realcertdir, char **prefix ) +{ + char sep = PR_GetDirectorySeparator(); + char *ptr = NULL; + struct PRFileInfo prfi; + PRStatus prc; + + *realcertdir = (char *)certdir; /* default is the one passed in */ + + /* if certdir is not given, just return */ + if ( !certdir ) { + return; + } + + prc = PR_GetFileInfo( certdir, &prfi ); + /* if certdir exists (file or directory) then it cannot specify a prefix */ + if ( prc == PR_SUCCESS ) { + return; + } + + /* if certdir was given, and there is a '/' in certdir, see if there + is anything after the last '/' - if so, assume it is the prefix */ + if ( ( ( ptr = strrchr( certdir, sep ) ) ) && *(ptr+1) ) { + *realcertdir = PL_strndup( certdir, ptr-certdir ); + *prefix = PL_strdup( ptr+1 ); + } + + return; +} + +/* + * Currently mutiple MozNSS contexts share one certificate storage. When the + * certdb is being opened, only new certificates are added to the storage. + * When different databases are used, conflicting nicknames make the + * certificate lookup by the nickname impossible. In addition a token + * description might be prepended in certain conditions. + * + * In order to make the certificate lookup by nickname possible, we explicitly + * open each database using SECMOD_OpenUserDB and assign it the token + * description. The token description is generated using ctx->tc_unique value, + * which is unique for each context. + */ +static PK11SlotInfo * +tlsm_init_open_certdb( tlsm_ctx *ctx, const char *dbdir, const char *prefix ) +{ + PK11SlotInfo *slot = NULL; + char *token_desc = NULL; + char *config = NULL; + + token_desc = PR_smprintf( TLSM_CERTDB_DESC_FMT, ctx->tc_unique ); + config = PR_smprintf( "configDir='%s' tokenDescription='%s' certPrefix='%s' keyPrefix='%s' flags=readOnly", + dbdir, token_desc, prefix, prefix ); + Debug( LDAP_DEBUG_TRACE, "TLS: certdb config: %s\n", config, 0, 0 ); + + slot = SECMOD_OpenUserDB( config ); + if ( !slot ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_TRACE, "TLS: cannot open certdb '%s', error %d:%s\n", dbdir, errcode, + PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + } + + if ( token_desc ) + PR_smprintf_free( token_desc ); + if ( config ) + PR_smprintf_free( config ); + + return slot; +} + +/* + * This is the part of the init we defer until we get the + * actual security configuration information. This is + * only called once, protected by a PRCallOnce + * NOTE: This must be done before the first call to SSL_ImportFD, + * especially the setting of the policy + * NOTE: This must be called after fork() + */ +static int +tlsm_deferred_init( void *arg ) +{ + tlsm_ctx *ctx = (tlsm_ctx *)arg; + struct ldaptls *lt = ctx->tc_config; + const char *securitydirs[3]; + int ii; + int nn; + PRErrorCode errcode = 1; +#ifdef HAVE_NSS_INITCONTEXT + NSSInitParameters initParams; + NSSInitContext *initctx = NULL; + PK11SlotInfo *certdb_slot = NULL; +#endif + SECStatus rc; + int done = 0; + +#ifdef HAVE_SECMOD_RESTARTMODULES + /* NSS enforces the pkcs11 requirement that modules should be unloaded after + a fork() - since there is no portable way to determine if NSS has been + already initialized in a parent process, we just call SECMOD_RestartModules + with force == FALSE - if the module has been unloaded due to a fork, it will + be reloaded, otherwise, it is a no-op */ + if ( SECFailure == ( rc = SECMOD_RestartModules(PR_FALSE /* do not force */) ) ) { + errcode = PORT_GetError(); + if ( errcode != SEC_ERROR_NOT_INITIALIZED ) { + Debug( LDAP_DEBUG_TRACE, + "TLS: could not restart the security modules: %d:%s\n", + errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 ); + } else { + errcode = 1; + } + } +#endif + +#ifdef HAVE_NSS_INITCONTEXT + memset( &initParams, 0, sizeof( initParams ) ); + initParams.length = sizeof( initParams ); +#endif /* HAVE_NSS_INITCONTEXT */ + +#ifdef LDAP_R_COMPILE + if ( PR_CallOnce( &tlsm_init_mutex_callonce, tlsm_thr_init_callonce ) ) { + return -1; + } +#endif /* LDAP_R_COMPILE */ + +#ifndef HAVE_NSS_INITCONTEXT + if ( !NSS_IsInitialized() ) { +#endif /* HAVE_NSS_INITCONTEXT */ + /* + MOZNSS_DIR will override everything else - you can + always set MOZNSS_DIR to force the use of this + directory + If using MOZNSS, specify the location of the moznss db dir + in the cacertdir directive of the OpenLDAP configuration. + DEFAULT_MOZNSS_DIR will only be used if the code cannot + find a security dir to use based on the current + settings + */ + nn = 0; + securitydirs[nn++] = PR_GetEnv( "MOZNSS_DIR" ); + securitydirs[nn++] = lt->lt_cacertdir; + securitydirs[nn++] = PR_GetEnv( "DEFAULT_MOZNSS_DIR" ); + for ( ii = 0; !done && ( ii < nn ); ++ii ) { + char *realcertdir = NULL; + const char *defprefix = ""; + char *prefix = (char *)defprefix; + const char *securitydir = securitydirs[ii]; + if ( NULL == securitydir ) { + continue; + } + + tlsm_get_certdb_prefix( securitydir, &realcertdir, &prefix ); + + /* initialize only moddb; certdb will be initialized explicitly */ +#ifdef HAVE_NSS_INITCONTEXT +#ifdef INITCONTEXT_HACK + if ( !NSS_IsInitialized() && ctx->tc_is_server ) { + rc = NSS_Initialize( realcertdir, prefix, prefix, SECMOD_DB, NSS_INIT_READONLY ); + } else { + initctx = NSS_InitContext( realcertdir, prefix, prefix, SECMOD_DB, + &initParams, NSS_INIT_READONLY|NSS_INIT_NOCERTDB ); + } +#else + initctx = NSS_InitContext( realcertdir, prefix, prefix, SECMOD_DB, + &initParams, NSS_INIT_READONLY|NSS_INIT_NOCERTDB ); +#endif + rc = SECFailure; + + if ( initctx != NULL ) { + certdb_slot = tlsm_init_open_certdb( ctx, realcertdir, prefix ); + if ( certdb_slot ) { + rc = SECSuccess; + ctx->tc_initctx = initctx; + ctx->tc_certdb_slot = certdb_slot; + } else { + NSS_ShutdownContext( initctx ); + initctx = NULL; + } + } +#else + rc = NSS_Initialize( realcertdir, prefix, prefix, SECMOD_DB, NSS_INIT_READONLY ); +#endif + + if ( rc != SECSuccess ) { + errcode = PORT_GetError(); + if ( securitydirs[ii] != lt->lt_cacertdir) { + Debug( LDAP_DEBUG_TRACE, + "TLS: could not initialize moznss using security dir %s prefix %s - error %d.\n", + realcertdir, prefix, errcode ); + } + } else { + /* success */ + Debug( LDAP_DEBUG_TRACE, "TLS: using moznss security dir %s prefix %s.\n", + realcertdir, prefix, 0 ); + errcode = 0; + done = 1; + } + if ( realcertdir != securitydir ) { + PL_strfree( realcertdir ); + } + if ( prefix != defprefix ) { + PL_strfree( prefix ); + } + } + + if ( errcode ) { /* no moznss db found, or not using moznss db */ +#ifdef HAVE_NSS_INITCONTEXT + int flags = NSS_INIT_READONLY|NSS_INIT_NOCERTDB|NSS_INIT_NOMODDB; +#ifdef INITCONTEXT_HACK + if ( !NSS_IsInitialized() && ctx->tc_is_server ) { + rc = NSS_NoDB_Init( NULL ); + } else { + initctx = NSS_InitContext( CERTDB_NONE, PREFIX_NONE, PREFIX_NONE, SECMOD_DB, + &initParams, flags ); + rc = (initctx == NULL) ? SECFailure : SECSuccess; + } +#else + initctx = NSS_InitContext( CERTDB_NONE, PREFIX_NONE, PREFIX_NONE, SECMOD_DB, + &initParams, flags ); + if ( initctx ) { + ctx->tc_initctx = initctx; + rc = SECSuccess; + } else { + rc = SECFailure; + } +#endif +#else + rc = NSS_NoDB_Init( NULL ); +#endif + if ( rc != SECSuccess ) { + errcode = PORT_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not initialize moznss - error %d:%s.\n", + errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 ); + return -1; + } + } + + if ( errcode || lt->lt_cacertfile ) { + /* initialize the PEM module */ + if ( tlsm_init_pem_module() ) { + int pem_errcode = PORT_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not initialize moznss PEM module - error %d:%s.\n", + pem_errcode, PR_ErrorToString( pem_errcode, PR_LANGUAGE_I_DEFAULT ), 0 ); + + if ( errcode ) /* PEM is required */ + return -1; + + } else if ( !errcode ) { + tlsm_init_ca_certs( ctx, lt->lt_cacertfile, NULL ); + } + } + + if ( errcode ) { + if ( tlsm_init_ca_certs( ctx, lt->lt_cacertfile, lt->lt_cacertdir ) ) { + /* if we tried to use lt->lt_cacertdir as an NSS key/cert db, errcode + will be a value other than 1 - print an error message so that the + user will know that failed too */ + if ( ( errcode != 1 ) && ( lt->lt_cacertdir ) ) { + char *realcertdir = NULL; + char *prefix = NULL; + tlsm_get_certdb_prefix( lt->lt_cacertdir, &realcertdir, &prefix ); + Debug( LDAP_DEBUG_TRACE, + "TLS: could not initialize moznss using security dir %s prefix %s - error %d.\n", + realcertdir, prefix ? prefix : "", errcode ); + if ( realcertdir != lt->lt_cacertdir ) { + PL_strfree( realcertdir ); + } + PL_strfree( prefix ); + } + return -1; + } + } + + NSS_SetDomesticPolicy(); + + PK11_SetPasswordFunc( tlsm_pin_prompt ); + + /* register cleanup function */ + if ( tlsm_register_nss_shutdown() ) { + errcode = PORT_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not register NSS shutdown function: %d:%s\n", + errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 ); + return -1; + } + + if ( ctx->tc_is_server ) { + /* 0 means use the defaults here */ + SSL_ConfigServerSessionIDCache( 0, 0, 0, NULL ); + } + +#ifndef HAVE_NSS_INITCONTEXT + } +#endif /* HAVE_NSS_INITCONTEXT */ + + return 0; +} + +/* + * Find and verify the certificate. + * The key is loaded and stored in ctx->tc_private_key + */ +static int +tlsm_find_and_verify_cert_key( tlsm_ctx *ctx ) +{ + SECCertificateUsage certUsage; + PRBool checkSig; + SECStatus status; + void *pin_arg; + + if ( tlsm_ctx_load_private_key( ctx ) ) + return -1; + + pin_arg = SSL_RevealPinArg( ctx->tc_model ); + certUsage = ctx->tc_is_server ? certificateUsageSSLServer : certificateUsageSSLClient; + checkSig = ctx->tc_verify_cert ? PR_TRUE : PR_FALSE; + + status = tlsm_verify_cert( ctx->tc_certdb, ctx->tc_certificate, pin_arg, + checkSig, certUsage, ctx->tc_warn_only, PR_TRUE ); + + return status == SECSuccess ? 0 : -1; +} + +static int +tlsm_get_client_auth_data( void *arg, PRFileDesc *fd, + CERTDistNames *caNames, CERTCertificate **pRetCert, + SECKEYPrivateKey **pRetKey ) +{ + tlsm_ctx *ctx = (tlsm_ctx *)arg; + + if ( pRetCert ) + *pRetCert = CERT_DupCertificate( ctx->tc_certificate ); + + if ( pRetKey ) + *pRetKey = SECKEY_CopyPrivateKey( ctx->tc_private_key ); + + return SECSuccess; +} + +/* + * ctx must have a tc_model that is valid +*/ +static int +tlsm_clientauth_init( tlsm_ctx *ctx ) +{ + SECStatus status = SECFailure; + int rc; + PRBool saveval; + + saveval = ctx->tc_warn_only; + ctx->tc_warn_only = PR_TRUE; + rc = tlsm_find_and_verify_cert_key(ctx); + ctx->tc_warn_only = saveval; + if ( rc ) { + Debug( LDAP_DEBUG_ANY, + "TLS: error: unable to set up client certificate authentication for " + "certificate named %s\n", tlsm_ctx_subject_name(ctx), 0, 0 ); + return -1; + } + + status = SSL_GetClientAuthDataHook( ctx->tc_model, + tlsm_get_client_auth_data, + (void *)ctx ); + + return ( status == SECSuccess ? 0 : -1 ); +} + +/* + * Tear down the TLS subsystem. Should only be called once. + */ +static void +tlsm_destroy( void ) +{ +#ifdef LDAP_R_COMPILE + ldap_pvt_thread_mutex_destroy( &tlsm_ctx_count_mutex ); + ldap_pvt_thread_mutex_destroy( &tlsm_init_mutex ); + ldap_pvt_thread_mutex_destroy( &tlsm_pem_mutex ); +#endif +} + +static struct ldaptls * +tlsm_copy_config ( const struct ldaptls *config ) +{ + struct ldaptls *copy; + + assert( config ); + + copy = LDAP_MALLOC( sizeof( *copy ) ); + if ( !copy ) + return NULL; + + memset( copy, 0, sizeof( *copy ) ); + + if ( config->lt_certfile ) + copy->lt_certfile = LDAP_STRDUP( config->lt_certfile ); + if ( config->lt_keyfile ) + copy->lt_keyfile = LDAP_STRDUP( config->lt_keyfile ); + if ( config->lt_dhfile ) + copy->lt_dhfile = LDAP_STRDUP( config->lt_dhfile ); + if ( config->lt_cacertfile ) + copy->lt_cacertfile = LDAP_STRDUP( config->lt_cacertfile ); + if ( config->lt_cacertdir ) + copy->lt_cacertdir = LDAP_STRDUP( config->lt_cacertdir ); + if ( config->lt_ciphersuite ) + copy->lt_ciphersuite = LDAP_STRDUP( config->lt_ciphersuite ); + if ( config->lt_crlfile ) + copy->lt_crlfile = LDAP_STRDUP( config->lt_crlfile ); + if ( config->lt_randfile ) + copy->lt_randfile = LDAP_STRDUP( config->lt_randfile ); + + copy->lt_protocol_min = config->lt_protocol_min; + + return copy; +} + +static void +tlsm_free_config ( struct ldaptls *config ) +{ + assert( config ); + + if ( config->lt_certfile ) + LDAP_FREE( config->lt_certfile ); + if ( config->lt_keyfile ) + LDAP_FREE( config->lt_keyfile ); + if ( config->lt_dhfile ) + LDAP_FREE( config->lt_dhfile ); + if ( config->lt_cacertfile ) + LDAP_FREE( config->lt_cacertfile ); + if ( config->lt_cacertdir ) + LDAP_FREE( config->lt_cacertdir ); + if ( config->lt_ciphersuite ) + LDAP_FREE( config->lt_ciphersuite ); + if ( config->lt_crlfile ) + LDAP_FREE( config->lt_crlfile ); + if ( config->lt_randfile ) + LDAP_FREE( config->lt_randfile ); + + LDAP_FREE( config ); +} + +static tls_ctx * +tlsm_ctx_new ( struct ldapoptions *lo ) +{ + tlsm_ctx *ctx; + + ctx = LDAP_MALLOC( sizeof (*ctx) ); + if ( ctx ) { + ctx->tc_refcnt = 1; +#ifdef LDAP_R_COMPILE + ldap_pvt_thread_mutex_init( &ctx->tc_refmutex ); +#endif + LDAP_MUTEX_LOCK( &tlsm_ctx_count_mutex ); + ctx->tc_unique = tlsm_ctx_count++; + LDAP_MUTEX_UNLOCK( &tlsm_ctx_count_mutex ); + ctx->tc_config = NULL; /* populated later by tlsm_ctx_init */ + ctx->tc_certdb = NULL; + ctx->tc_certdb_slot = NULL; + ctx->tc_certificate = NULL; + ctx->tc_private_key = NULL; + ctx->tc_pin_file = NULL; + ctx->tc_model = NULL; + memset(&ctx->tc_callonce, 0, sizeof(ctx->tc_callonce)); + ctx->tc_require_cert = lo->ldo_tls_require_cert; + ctx->tc_verify_cert = PR_FALSE; + ctx->tc_using_pem = PR_FALSE; +#ifdef HAVE_NSS_INITCONTEXT + ctx->tc_initctx = NULL; +#endif /* HAVE_NSS_INITCONTEXT */ + ctx->tc_pem_objs = NULL; + ctx->tc_n_pem_objs = 0; + ctx->tc_warn_only = PR_FALSE; + } + return (tls_ctx *)ctx; +} + +static void +tlsm_ctx_ref( tls_ctx *ctx ) +{ + tlsm_ctx *c = (tlsm_ctx *)ctx; + LDAP_MUTEX_LOCK( &c->tc_refmutex ); + c->tc_refcnt++; + LDAP_MUTEX_UNLOCK( &c->tc_refmutex ); +} + +static void +tlsm_ctx_free ( tls_ctx *ctx ) +{ + tlsm_ctx *c = (tlsm_ctx *)ctx; + int refcount; + + if ( !c ) return; + + LDAP_MUTEX_LOCK( &c->tc_refmutex ); + refcount = --c->tc_refcnt; + LDAP_MUTEX_UNLOCK( &c->tc_refmutex ); + if ( refcount ) + return; + + LDAP_MUTEX_LOCK( &tlsm_init_mutex ); + if ( c->tc_model ) + PR_Close( c->tc_model ); + if ( c->tc_certificate ) + CERT_DestroyCertificate( c->tc_certificate ); + if ( c->tc_private_key ) + SECKEY_DestroyPrivateKey( c->tc_private_key ); + c->tc_certdb = NULL; /* if not the default, may have to clean up */ + if ( c->tc_certdb_slot ) { + if ( SECMOD_CloseUserDB( c->tc_certdb_slot ) ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not close certdb slot - error %d:%s.\n", + errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 ); + } + } + if ( c->tc_pin_file ) { + PL_strfree( c->tc_pin_file ); + c->tc_pin_file = NULL; + } + tlsm_free_pem_objs( c ); +#ifdef HAVE_NSS_INITCONTEXT + if ( c->tc_initctx ) { + if ( NSS_ShutdownContext( c->tc_initctx ) ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could not shutdown NSS - error %d:%s.\n", + errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ), 0 ); + } + } + c->tc_initctx = NULL; +#endif /* HAVE_NSS_INITCONTEXT */ + LDAP_MUTEX_UNLOCK( &tlsm_init_mutex ); +#ifdef LDAP_R_COMPILE + ldap_pvt_thread_mutex_destroy( &c->tc_refmutex ); +#endif + + if ( c->tc_config ) + tlsm_free_config( c->tc_config ); + + LDAP_FREE( c ); +} + +/* + * initialize a new TLS context + */ +static int +tlsm_ctx_init( struct ldapoptions *lo, struct ldaptls *lt, int is_server ) +{ + tlsm_ctx *ctx = (tlsm_ctx *)lo->ldo_tls_ctx; + ctx->tc_config = tlsm_copy_config( lt ); + ctx->tc_is_server = is_server; + + return 0; +} + +/* returns true if the given string looks like + "tokenname" ":" "certnickname" + This is true if there is a ':' colon character + in the string and the colon is not the first + or the last character in the string +*/ +static int +tlsm_is_tokenname_certnick( const char *certfile ) +{ + if ( certfile ) { + const char *ptr = PL_strchr( certfile, ':' ); + return ptr && (ptr != certfile) && (*(ptr+1)); + } + return 0; +} + +static int +tlsm_deferred_ctx_init( void *arg ) +{ + tlsm_ctx *ctx = (tlsm_ctx *)arg; + PRBool sslv2 = PR_FALSE; + PRBool sslv3 = PR_TRUE; + PRBool tlsv1 = PR_TRUE; + PRBool request_cert = PR_FALSE; + PRInt32 require_cert = PR_FALSE; + PRFileDesc *fd; + struct ldaptls *lt; + + if ( tlsm_deferred_init( ctx ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not perform TLS system initialization.\n", + 0, 0, 0 ); + return -1; + } + + ctx->tc_certdb = CERT_GetDefaultCertDB(); /* If there is ever a per-context db, change this */ + + fd = PR_CreateIOLayerStub( tlsm_layer_id, &tlsm_PR_methods ); + if ( fd ) { + ctx->tc_model = SSL_ImportFD( NULL, fd ); + } + + if ( !ctx->tc_model ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: could perform TLS socket I/O layer initialization - error %d:%s.\n", + err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL ); + + if ( fd ) { + PR_Close( fd ); + } + return -1; + } + + if ( SSL_SetPKCS11PinArg(ctx->tc_model, ctx) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set pin prompt argument\n", 0, 0, 0); + return -1; + } + + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_SECURITY, PR_TRUE ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set secure mode on.\n", + 0, 0, 0 ); + return -1; + } + + lt = ctx->tc_config; + + /* default is sslv3 and tlsv1 */ + if ( lt->lt_protocol_min ) { + if ( lt->lt_protocol_min > LDAP_OPT_X_TLS_PROTOCOL_SSL3 ) { + sslv3 = PR_FALSE; + } else if ( lt->lt_protocol_min <= LDAP_OPT_X_TLS_PROTOCOL_SSL2 ) { + sslv2 = PR_TRUE; + Debug( LDAP_DEBUG_ANY, + "TLS: warning: minimum TLS protocol level set to " + "include SSLv2 - SSLv2 is insecure - do not use\n", 0, 0, 0 ); + } + } + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_ENABLE_SSL2, sslv2 ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set SSLv2 mode on.\n", + 0, 0, 0 ); + return -1; + } + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_ENABLE_SSL3, sslv3 ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set SSLv3 mode on.\n", + 0, 0, 0 ); + return -1; + } + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_ENABLE_TLS, tlsv1 ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set TLSv1 mode on.\n", + 0, 0, 0 ); + return -1; + } + + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_HANDSHAKE_AS_CLIENT, !ctx->tc_is_server ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set handshake as client.\n", + 0, 0, 0 ); + return -1; + } + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_HANDSHAKE_AS_SERVER, ctx->tc_is_server ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set handshake as server.\n", + 0, 0, 0 ); + return -1; + } + + if ( lt->lt_ciphersuite ) { + if ( tlsm_parse_ciphers( ctx, lt->lt_ciphersuite ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set cipher list %s.\n", + lt->lt_ciphersuite, 0, 0 ); + return -1; + } + } else if ( tlsm_parse_ciphers( ctx, "DEFAULT" ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set cipher list DEFAULT.\n", + 0, 0, 0 ); + return -1; + } + + if ( !ctx->tc_require_cert ) { + ctx->tc_verify_cert = PR_FALSE; + } else if ( !ctx->tc_is_server ) { + request_cert = PR_TRUE; + require_cert = SSL_REQUIRE_NO_ERROR; + if ( ctx->tc_require_cert == LDAP_OPT_X_TLS_DEMAND || + ctx->tc_require_cert == LDAP_OPT_X_TLS_HARD ) { + require_cert = SSL_REQUIRE_ALWAYS; + } + if ( ctx->tc_require_cert != LDAP_OPT_X_TLS_ALLOW ) + ctx->tc_verify_cert = PR_TRUE; + } else { /* server */ + /* server does not request certs by default */ + /* if allow - client may send cert, server will ignore if errors */ + /* if try - client may send cert, server will error if bad cert */ + /* if hard or demand - client must send cert, server will error if bad cert */ + request_cert = PR_TRUE; + require_cert = SSL_REQUIRE_NO_ERROR; + if ( ctx->tc_require_cert == LDAP_OPT_X_TLS_DEMAND || + ctx->tc_require_cert == LDAP_OPT_X_TLS_HARD ) { + require_cert = SSL_REQUIRE_ALWAYS; + } + if ( ctx->tc_require_cert != LDAP_OPT_X_TLS_ALLOW ) { + ctx->tc_verify_cert = PR_TRUE; + } else { + ctx->tc_warn_only = PR_TRUE; + } + } + + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_REQUEST_CERTIFICATE, request_cert ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set request certificate mode.\n", + 0, 0, 0 ); + return -1; + } + + if ( SECSuccess != SSL_OptionSet( ctx->tc_model, SSL_REQUIRE_CERTIFICATE, require_cert ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: could not set require certificate mode.\n", + 0, 0, 0 ); + return -1; + } + + /* set up our cert and key, if any */ + if ( lt->lt_certfile ) { + + /* first search in certdb (lt_certfile is nickname) */ + if ( ctx->tc_certdb ) { + char *tmp_certname; + + if ( tlsm_is_tokenname_certnick( lt->lt_certfile )) { + /* assume already in form tokenname:certnickname */ + tmp_certname = PL_strdup( lt->lt_certfile ); + } else if ( ctx->tc_certdb_slot ) { + tmp_certname = PR_smprintf( TLSM_CERTDB_DESC_FMT ":%s", ctx->tc_unique, lt->lt_certfile ); + } else { + tmp_certname = PR_smprintf( "%s", lt->lt_certfile ); + } + + ctx->tc_certificate = PK11_FindCertFromNickname( tmp_certname, SSL_RevealPinArg( ctx->tc_model ) ); + PR_smprintf_free( tmp_certname ); + + if ( !ctx->tc_certificate ) { + PRErrorCode errcode = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: error: the certificate '%s' could not be found in the database - error %d:%s.\n", + lt->lt_certfile, errcode, PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) ); + } + } + + /* fallback to PEM module (lt_certfile is filename) */ + if ( !ctx->tc_certificate ) { + if ( !pem_module && tlsm_init_pem_module() ) { + int pem_errcode = PORT_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: fallback to PEM impossible, module cannot be loaded - error %d:%s.\n", + pem_errcode, PR_ErrorToString( pem_errcode, PR_LANGUAGE_I_DEFAULT ), 0 ); + return -1; + } + + /* this sets ctx->tc_certificate to the correct value */ + if ( !tlsm_add_cert_from_file( ctx, lt->lt_certfile, PR_FALSE ) ) { + ctx->tc_using_pem = PR_TRUE; + } + } + + if ( ctx->tc_certificate ) { + Debug( LDAP_DEBUG_ANY, + "TLS: certificate '%s' successfully loaded from %s.\n", lt->lt_certfile, + ctx->tc_using_pem ? "PEM file" : "moznss database", 0); + } else { + return -1; + } + } + + if ( lt->lt_keyfile ) { + /* if using the PEM module, load the PEM file specified by lt_keyfile */ + /* otherwise, assume this is the pininfo for the key */ + if ( ctx->tc_using_pem ) { + int rc = tlsm_add_key_from_file( ctx, lt->lt_keyfile ); + if ( rc ) { + return rc; + } + } else { + if ( ctx->tc_pin_file ) + PL_strfree( ctx->tc_pin_file ); + ctx->tc_pin_file = PL_strdup( lt->lt_keyfile ); + } + } + + /* Set up callbacks for use by clients */ + if ( !ctx->tc_is_server ) { + if ( SSL_OptionSet( ctx->tc_model, SSL_NO_CACHE, PR_TRUE ) != SECSuccess ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: error: could not set nocache option for moznss - error %d:%s\n", + err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL ); + return -1; + } + + if ( SSL_BadCertHook( ctx->tc_model, tlsm_bad_cert_handler, ctx ) != SECSuccess ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: error: could not set bad cert handler for moznss - error %d:%s\n", + err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL ); + return -1; + } + + /* + since a cert has been specified, assume the client wants to do cert auth + */ + if ( ctx->tc_certificate ) { + if ( tlsm_clientauth_init( ctx ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: error: unable to set up client certificate authentication using '%s'\n", + tlsm_ctx_subject_name(ctx), 0, 0 ); + return -1; + } + } + } else { /* set up secure server */ + SSLKEAType certKEA; + SECStatus status; + + /* must have a certificate for the server to use */ + if ( !ctx->tc_certificate ) { + Debug( LDAP_DEBUG_ANY, + "TLS: error: no server certificate: must specify a certificate for the server to use\n", + 0, 0, 0 ); + return -1; + } + + if ( tlsm_find_and_verify_cert_key( ctx ) ) { + Debug( LDAP_DEBUG_ANY, + "TLS: error: unable to find and verify server's cert and key for certificate %s\n", + tlsm_ctx_subject_name(ctx), 0, 0 ); + return -1; + } + + /* configure the socket to be a secure server socket */ + certKEA = NSS_FindCertKEAType( ctx->tc_certificate ); + status = SSL_ConfigSecureServer( ctx->tc_model, ctx->tc_certificate, ctx->tc_private_key, certKEA ); + + if ( SECSuccess != status ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: error: unable to configure secure server using certificate '%s' - error %d:%s\n", + tlsm_ctx_subject_name(ctx), err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ) ); + return -1; + } + } + + /* Callback for authenticating certificate */ + if ( SSL_AuthCertificateHook( ctx->tc_model, tlsm_auth_cert_handler, + ctx ) != SECSuccess ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: error: could not set auth cert handler for moznss - error %d:%s\n", + err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL ); + return -1; + } + + if ( SSL_HandshakeCallback( ctx->tc_model, tlsm_handshake_complete_cb, ctx ) ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: error: could not set handshake callback for moznss - error %d:%s\n", + err, PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ), NULL ); + return -1; + } + + tlsm_free_config( ctx->tc_config ); + ctx->tc_config = NULL; + + return 0; +} + +struct tls_data { + tlsm_session *session; + Sockbuf_IO_Desc *sbiod; + /* there seems to be no portable way to determine if the + sockbuf sd has been set to nonblocking mode - the + call to ber_pvt_socket_set_nonblock() takes place + before the tls socket is set up, so we cannot + intercept that call either. + On systems where fcntl is available, we can just + F_GETFL and test for O_NONBLOCK. On other systems, + we will just see if the IO op returns EAGAIN or EWOULDBLOCK, + and just set this flag */ + PRBool nonblock; + /* + * NSS tries hard to be backwards compatible with SSLv2 clients, or + * clients that send an SSLv2 client hello. This message is not + * tagged in any way, so NSS has no way to know if the incoming + * message is a valid SSLv2 client hello or just some bogus data + * (or cleartext LDAP). We store the first byte read from the + * client here. The most common case will be a client sending + * LDAP data instead of SSL encrypted LDAP data. This can happen, + * for example, if using ldapsearch -Z - if the starttls fails, + * the client will fallback to plain cleartext LDAP. So if we + * see that the firstbyte is a valid LDAP tag, we can be + * pretty sure this is happening. + */ + ber_tag_t firsttag; + /* + * NSS doesn't return SSL_ERROR_WANT_READ, SSL_ERROR_WANT_WRITE, etc. + * when it is blocked, so we have to set a flag in the wrapped send + * and recv calls that tells us what operation NSS was last blocked + * on + */ +#define TLSM_READ 1 +#define TLSM_WRITE 2 + int io_flag; +}; + +static struct tls_data * +tlsm_get_pvt_tls_data( PRFileDesc *fd ) +{ + struct tls_data *p; + PRFileDesc *myfd; + + if ( !fd ) { + return NULL; + } + + myfd = PR_GetIdentitiesLayer( fd, tlsm_layer_id ); + + if ( !myfd ) { + return NULL; + } + + p = (struct tls_data *)myfd->secret; + + return p; +} + +static int +tlsm_is_non_ssl_message( PRFileDesc *fd, ber_tag_t *thebyte ) +{ + struct tls_data *p; + + if ( thebyte ) { + *thebyte = LBER_DEFAULT; + } + + p = tlsm_get_pvt_tls_data( fd ); + if ( p == NULL || p->sbiod == NULL ) { + return 0; + } + + if ( p->firsttag == LBER_SEQUENCE ) { + if ( thebyte ) { + *thebyte = p->firsttag; + } + return 1; + } + + return 0; +} + +static tls_session * +tlsm_session_new ( tls_ctx * ctx, int is_server ) +{ + tlsm_ctx *c = (tlsm_ctx *)ctx; + tlsm_session *session; + PRFileDesc *fd; + PRStatus status; + int rc; + + c->tc_is_server = is_server; + LDAP_MUTEX_LOCK( &tlsm_init_mutex ); + status = PR_CallOnceWithArg( &c->tc_callonce, tlsm_deferred_ctx_init, c ); + LDAP_MUTEX_UNLOCK( &tlsm_init_mutex ); + if ( PR_SUCCESS != status ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_ANY, + "TLS: error: could not initialize moznss security context - error %d:%s\n", + err, PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT), NULL ); + return NULL; + } + + fd = PR_CreateIOLayerStub( tlsm_layer_id, &tlsm_PR_methods ); + if ( !fd ) { + return NULL; + } + + session = SSL_ImportFD( c->tc_model, fd ); + if ( !session ) { + PR_DELETE( fd ); + return NULL; + } + + rc = SSL_ResetHandshake( session, is_server ); + if ( rc ) { + PRErrorCode err = PR_GetError(); + Debug( LDAP_DEBUG_TRACE, + "TLS: error: new session - reset handshake failure %d - error %d:%s\n", + rc, err, + err ? PR_ErrorToString( err, PR_LANGUAGE_I_DEFAULT ) : "unknown" ); + PR_DELETE( fd ); + PR_Close( session ); + session = NULL; + } + + return (tls_session *)session; +} + +static int +tlsm_session_accept_or_connect( tls_session *session, int is_accept ) +{ + tlsm_session *s = (tlsm_session *)session; + int rc; + const char *op = is_accept ? "accept" : "connect"; + + if ( pem_module ) { + LDAP_MUTEX_LOCK( &tlsm_pem_mutex ); + } + rc = SSL_ForceHandshake( s ); + if ( pem_module ) { + LDAP_MUTEX_UNLOCK( &tlsm_pem_mutex ); + } + if ( rc ) { + PRErrorCode err = PR_GetError(); + rc = -1; + if ( err == PR_WOULD_BLOCK_ERROR ) { + ber_tag_t thetag = LBER_DEFAULT; + /* see if we are blocked because of a bogus packet */ + if ( tlsm_is_non_ssl_message( s, &thetag ) ) { /* see if we received a non-SSL message */ + Debug( LDAP_DEBUG_ANY, + "TLS: error: %s - error - received non-SSL message [0x%x]\n", + op, (unsigned int)thetag, 0 ); + /* reset error to something more descriptive */ + PR_SetError( SSL_ERROR_RX_MALFORMED_HELLO_REQUEST, EPROTO ); + } + } else { + Debug( LDAP_DEBUG_ANY, + "TLS: error: %s - force handshake failure: errno %d - moznss error %d\n", + op, errno, err ); + } + } + + return rc; +} +static int +tlsm_session_accept( tls_session *session ) +{ + return tlsm_session_accept_or_connect( session, 1 ); +} + +static int +tlsm_session_connect( LDAP *ld, tls_session *session ) +{ + return tlsm_session_accept_or_connect( session, 0 ); +} + +static int +tlsm_session_upflags( Sockbuf *sb, tls_session *session, int rc ) +{ + int prerror = PR_GetError(); + + if ( ( prerror == PR_PENDING_INTERRUPT_ERROR ) || ( prerror == PR_WOULD_BLOCK_ERROR ) ) { + tlsm_session *s = (tlsm_session *)session; + struct tls_data *p = tlsm_get_pvt_tls_data( s ); + + if ( p && ( p->io_flag == TLSM_READ ) ) { + sb->sb_trans_needs_read = 1; + return 1; + } else if ( p && ( p->io_flag == TLSM_WRITE ) ) { + sb->sb_trans_needs_write = 1; + return 1; + } + } + + return 0; +} + +static char * +tlsm_session_errmsg( tls_session *sess, int rc, char *buf, size_t len ) +{ + int i; + int prerror = PR_GetError(); + + i = PR_GetErrorTextLength(); + if ( i > len ) { + char *msg = LDAP_MALLOC( i+1 ); + PR_GetErrorText( msg ); + memcpy( buf, msg, len ); + LDAP_FREE( msg ); + } else if ( i ) { + PR_GetErrorText( buf ); + } else if ( prerror ) { + i = PR_snprintf( buf, len, "TLS error %d:%s", + prerror, PR_ErrorToString( prerror, PR_LANGUAGE_I_DEFAULT ) ); + } + + return ( i > 0 ) ? buf : NULL; +} + +static int +tlsm_session_my_dn( tls_session *session, struct berval *der_dn ) +{ + tlsm_session *s = (tlsm_session *)session; + CERTCertificate *cert; + + cert = SSL_LocalCertificate( s ); + if (!cert) return LDAP_INVALID_CREDENTIALS; + + der_dn->bv_val = (char *)cert->derSubject.data; + der_dn->bv_len = cert->derSubject.len; + CERT_DestroyCertificate( cert ); + return 0; +} + +static int +tlsm_session_peer_dn( tls_session *session, struct berval *der_dn ) +{ + tlsm_session *s = (tlsm_session *)session; + CERTCertificate *cert; + + cert = SSL_PeerCertificate( s ); + if (!cert) return LDAP_INVALID_CREDENTIALS; + + der_dn->bv_val = (char *)cert->derSubject.data; + der_dn->bv_len = cert->derSubject.len; + CERT_DestroyCertificate( cert ); + return 0; +} + +/* what kind of hostname were we given? */ +#define IS_DNS 0 +#define IS_IP4 1 +#define IS_IP6 2 + +static int +tlsm_session_chkhost( LDAP *ld, tls_session *session, const char *name_in ) +{ + tlsm_session *s = (tlsm_session *)session; + CERTCertificate *cert; + const char *name, *domain = NULL, *ptr; + int ret, ntype = IS_DNS, nlen, dlen; +#ifdef LDAP_PF_INET6 + struct in6_addr addr; +#else + struct in_addr addr; +#endif + SECItem altname; + SECStatus rv; + + if( ldap_int_hostname && + ( !name_in || !strcasecmp( name_in, "localhost" ) ) ) + { + name = ldap_int_hostname; + } else { + name = name_in; + } + nlen = strlen( name ); + + cert = SSL_PeerCertificate( s ); + if (!cert) { + Debug( LDAP_DEBUG_ANY, + "TLS: unable to get peer certificate.\n", + 0, 0, 0 ); + /* if this was a fatal condition, things would have + * aborted long before now. + */ + return LDAP_SUCCESS; + } + +#ifdef LDAP_PF_INET6 + if (inet_pton(AF_INET6, name, &addr)) { + ntype = IS_IP6; + } else +#endif + if ((ptr = strrchr(name, '.')) && isdigit((unsigned char)ptr[1])) { + if (inet_aton(name, (struct in_addr *)&addr)) ntype = IS_IP4; + } + if (ntype == IS_DNS ) { + domain = strchr( name, '.' ); + if ( domain ) + dlen = nlen - ( domain - name ); + } + + ret = LDAP_LOCAL_ERROR; + + rv = CERT_FindCertExtension( cert, SEC_OID_X509_SUBJECT_ALT_NAME, + &altname ); + if ( rv == SECSuccess && altname.data ) { + PRArenaPool *arena; + CERTGeneralName *names, *cur; + + arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); + if ( !arena ) { + ret = LDAP_NO_MEMORY; + goto fail; + } + + names = cur = CERT_DecodeAltNameExtension(arena, &altname); + if ( !cur ) + goto altfail; + + do { + char *host; + int hlen; + + /* ignore empty */ + if ( !cur->name.other.len ) continue; + + host = (char *)cur->name.other.data; + hlen = cur->name.other.len; + + if ( cur->type == certDNSName ) { + if ( ntype != IS_DNS ) continue; + + /* is this an exact match? */ + if ( nlen == hlen && !strncasecmp( name, host, nlen )) { + ret = LDAP_SUCCESS; + break; + } + + /* is this a wildcard match? */ + if ( domain && host[0] == '*' && host[1] == '.' && + dlen == hlen-1 && !strncasecmp( domain, host+1, dlen )) { + ret = LDAP_SUCCESS; + break; + } + } else if ( cur->type == certIPAddress ) { + if ( ntype == IS_DNS ) continue; + +#ifdef LDAP_PF_INET6 + if (ntype == IS_IP6 && hlen != sizeof(struct in6_addr)) { + continue; + } else +#endif + if (ntype == IS_IP4 && hlen != sizeof(struct in_addr)) { + continue; + } + if (!memcmp(host, &addr, hlen)) { + ret = LDAP_SUCCESS; + break; + } + } + } while (( cur = CERT_GetNextGeneralName( cur )) != names ); +altfail: + PORT_FreeArena( arena, PR_FALSE ); + SECITEM_FreeItem( &altname, PR_FALSE ); + } + /* no altnames matched, try the CN */ + if ( ret != LDAP_SUCCESS ) { + /* find the last CN */ + CERTRDN *rdn, **rdns; + CERTAVA *lastava = NULL; + char buf[2048]; + + buf[0] = '\0'; + rdns = cert->subject.rdns; + while ( rdns && ( rdn = *rdns++ )) { + CERTAVA *ava, **avas = rdn->avas; + while ( avas && ( ava = *avas++ )) { + if ( CERT_GetAVATag( ava ) == SEC_OID_AVA_COMMON_NAME ) + lastava = ava; + } + } + if ( lastava ) { + SECItem *av = CERT_DecodeAVAValue( &lastava->value ); + if ( av ) { + if ( av->len == nlen && !strncasecmp( name, (char *)av->data, nlen )) { + ret = LDAP_SUCCESS; + } else if ( av->data[0] == '*' && av->data[1] == '.' && + domain && dlen == av->len - 1 && !strncasecmp( domain, + (char *)(av->data+1), dlen )) { + ret = LDAP_SUCCESS; + } else { + int len = av->len; + if ( len >= sizeof(buf) ) + len = sizeof(buf)-1; + memcpy( buf, av->data, len ); + buf[len] = '\0'; + } + SECITEM_FreeItem( av, PR_TRUE ); + } + } + if ( ret != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, "TLS: hostname (%s) does not match " + "common name in certificate (%s).\n", + name, buf, 0 ); + ret = LDAP_CONNECT_ERROR; + if ( ld->ld_error ) { + LDAP_FREE( ld->ld_error ); + } + ld->ld_error = LDAP_STRDUP( + _("TLS: hostname does not match CN in peer certificate")); + } + } + +fail: + CERT_DestroyCertificate( cert ); + return ret; +} + +static int +tlsm_session_strength( tls_session *session ) +{ + tlsm_session *s = (tlsm_session *)session; + int rc, keySize; + + rc = SSL_SecurityStatus( s, NULL, NULL, NULL, &keySize, + NULL, NULL ); + return rc ? 0 : keySize; +} + +/* + * TLS support for LBER Sockbufs + */ + +static PRStatus PR_CALLBACK +tlsm_PR_Close(PRFileDesc *fd) +{ + int rc = PR_SUCCESS; + + /* we don't need to actually close anything here, just + pop our io layer off the stack */ + fd->secret = NULL; /* must have been freed before calling PR_Close */ + if ( fd->lower ) { + fd = PR_PopIOLayer( fd, tlsm_layer_id ); + /* if we are not the last layer, pass the close along */ + if ( fd ) { + if ( fd->dtor ) { + fd->dtor( fd ); + } + rc = fd->methods->close( fd ); + } + } else { + /* we are the last layer - just call our dtor */ + fd->dtor(fd); + } + + return rc; +} + +static PRStatus PR_CALLBACK +tlsm_PR_Shutdown(PRFileDesc *fd, PRShutdownHow how) +{ + int rc = PR_SUCCESS; + + if ( fd->lower ) { + rc = PR_Shutdown( fd->lower, how ); + } + + return rc; +} + +static int PR_CALLBACK +tlsm_PR_Recv(PRFileDesc *fd, void *buf, PRInt32 len, PRIntn flags, + PRIntervalTime timeout) +{ + struct tls_data *p; + int rc; + + if ( buf == NULL || len <= 0 ) return 0; + + p = tlsm_get_pvt_tls_data( fd ); + + if ( p == NULL || p->sbiod == NULL ) { + return 0; + } + + rc = LBER_SBIOD_READ_NEXT( p->sbiod, buf, len ); + if (rc <= 0) { + tlsm_map_error( errno ); + if ( errno == EAGAIN || errno == EWOULDBLOCK ) { + p->nonblock = PR_TRUE; /* fd is using non-blocking io */ + } else if ( errno ) { /* real error */ + Debug( LDAP_DEBUG_TRACE, + "TLS: error: tlsm_PR_Recv returned %d - error %d:%s\n", + rc, errno, STRERROR(errno) ); + } + } else if ( ( rc > 0 ) && ( len > 0 ) && ( p->firsttag == LBER_DEFAULT ) ) { + p->firsttag = (ber_tag_t)*((char *)buf); + } + p->io_flag = TLSM_READ; + + return rc; +} + +static int PR_CALLBACK +tlsm_PR_Send(PRFileDesc *fd, const void *buf, PRInt32 len, PRIntn flags, + PRIntervalTime timeout) +{ + struct tls_data *p; + int rc; + + if ( buf == NULL || len <= 0 ) return 0; + + p = tlsm_get_pvt_tls_data( fd ); + + if ( p == NULL || p->sbiod == NULL ) { + return 0; + } + + rc = LBER_SBIOD_WRITE_NEXT( p->sbiod, (char *)buf, len ); + if (rc <= 0) { + tlsm_map_error( errno ); + if ( errno == EAGAIN || errno == EWOULDBLOCK ) { + p->nonblock = PR_TRUE; + } else if ( errno ) { /* real error */ + Debug( LDAP_DEBUG_TRACE, + "TLS: error: tlsm_PR_Send returned %d - error %d:%s\n", + rc, errno, STRERROR(errno) ); + } + } + p->io_flag = TLSM_WRITE; + + return rc; +} + +static int PR_CALLBACK +tlsm_PR_Read(PRFileDesc *fd, void *buf, PRInt32 len) +{ + return tlsm_PR_Recv( fd, buf, len, 0, PR_INTERVAL_NO_TIMEOUT ); +} + +static int PR_CALLBACK +tlsm_PR_Write(PRFileDesc *fd, const void *buf, PRInt32 len) +{ + return tlsm_PR_Send( fd, buf, len, 0, PR_INTERVAL_NO_TIMEOUT ); +} + +static PRStatus PR_CALLBACK +tlsm_PR_GetPeerName(PRFileDesc *fd, PRNetAddr *addr) +{ + struct tls_data *p; + ber_socklen_t len; + + p = tlsm_get_pvt_tls_data( fd ); + + if ( p == NULL || p->sbiod == NULL ) { + return PR_FAILURE; + } + len = sizeof(PRNetAddr); + return getpeername( p->sbiod->sbiod_sb->sb_fd, (struct sockaddr *)addr, &len ); +} + +static PRStatus PR_CALLBACK +tlsm_PR_GetSocketOption(PRFileDesc *fd, PRSocketOptionData *data) +{ + struct tls_data *p; + p = tlsm_get_pvt_tls_data( fd ); + + if ( p == NULL || data == NULL ) { + return PR_FAILURE; + } + + /* only the nonblocking option is supported at this time + MozNSS SSL code needs it */ + if ( data->option != PR_SockOpt_Nonblocking ) { + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return PR_FAILURE; + } +#ifdef HAVE_FCNTL + int flags = fcntl( p->sbiod->sbiod_sb->sb_fd, F_GETFL ); + data->value.non_blocking = (flags & O_NONBLOCK) ? PR_TRUE : PR_FALSE; +#else /* punt :P */ + data->value.non_blocking = p->nonblock; +#endif + return PR_SUCCESS; +} + +static PRStatus PR_CALLBACK +tlsm_PR_prs_unimp() +{ + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return PR_FAILURE; +} + +static PRFileDesc * PR_CALLBACK +tlsm_PR_pfd_unimp() +{ + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return NULL; +} + +static PRInt16 PR_CALLBACK +tlsm_PR_i16_unimp() +{ + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return SECFailure; +} + +static PRInt32 PR_CALLBACK +tlsm_PR_i32_unimp() +{ + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + return SECFailure; +} + +static PRInt64 PR_CALLBACK +tlsm_PR_i64_unimp() +{ + PRInt64 res; + + PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0); + LL_I2L(res, -1L); + return res; +} + +static const PRIOMethods tlsm_PR_methods = { + PR_DESC_LAYERED, + tlsm_PR_Close, /* close */ + tlsm_PR_Read, /* read */ + tlsm_PR_Write, /* write */ + tlsm_PR_i32_unimp, /* available */ + tlsm_PR_i64_unimp, /* available64 */ + tlsm_PR_prs_unimp, /* fsync */ + tlsm_PR_i32_unimp, /* seek */ + tlsm_PR_i64_unimp, /* seek64 */ + tlsm_PR_prs_unimp, /* fileInfo */ + tlsm_PR_prs_unimp, /* fileInfo64 */ + tlsm_PR_i32_unimp, /* writev */ + tlsm_PR_prs_unimp, /* connect */ + tlsm_PR_pfd_unimp, /* accept */ + tlsm_PR_prs_unimp, /* bind */ + tlsm_PR_prs_unimp, /* listen */ + (PRShutdownFN)tlsm_PR_Shutdown, /* shutdown */ + tlsm_PR_Recv, /* recv */ + tlsm_PR_Send, /* send */ + tlsm_PR_i32_unimp, /* recvfrom */ + tlsm_PR_i32_unimp, /* sendto */ + (PRPollFN)tlsm_PR_i16_unimp, /* poll */ + tlsm_PR_i32_unimp, /* acceptread */ + tlsm_PR_i32_unimp, /* transmitfile */ + tlsm_PR_prs_unimp, /* getsockname */ + tlsm_PR_GetPeerName, /* getpeername */ + tlsm_PR_i32_unimp, /* getsockopt OBSOLETE */ + tlsm_PR_i32_unimp, /* setsockopt OBSOLETE */ + tlsm_PR_GetSocketOption, /* getsocketoption */ + tlsm_PR_i32_unimp, /* setsocketoption */ + tlsm_PR_i32_unimp, /* Send a (partial) file with header/trailer*/ + (PRConnectcontinueFN)tlsm_PR_prs_unimp, /* connectcontinue */ + tlsm_PR_i32_unimp, /* reserved for future use */ + tlsm_PR_i32_unimp, /* reserved for future use */ + tlsm_PR_i32_unimp, /* reserved for future use */ + tlsm_PR_i32_unimp /* reserved for future use */ +}; + +/* + * Initialize TLS subsystem. Should be called only once. + * See tlsm_deferred_init for the bulk of the init process + */ +static int +tlsm_init( void ) +{ + char *nofork = PR_GetEnv( "NSS_STRICT_NOFORK" ); + + PR_Init(0, 0, 0); + + tlsm_layer_id = PR_GetUniqueIdentity( "OpenLDAP" ); + + /* + * There are some applications that acquire a crypto context in the parent process + * and expect that crypto context to work after a fork(). This does not work + * with NSS using strict PKCS11 compliance mode. We set this environment + * variable here to tell the software encryption module/token to allow crypto + * contexts to persist across a fork(). However, if you are using some other + * module or encryption device that supports and expects full PKCS11 semantics, + * the only recourse is to rewrite the application with atfork() handlers to save + * the crypto context in the parent and restore (and SECMOD_RestartModules) the + * context in the child. + */ + if ( !nofork ) { + /* will leak one time */ + char *noforkenvvar = PL_strdup( "NSS_STRICT_NOFORK=DISABLED" ); + PR_SetEnv( noforkenvvar ); + } + + return 0; +} + +static int +tlsm_sb_setup( Sockbuf_IO_Desc *sbiod, void *arg ) +{ + struct tls_data *p; + tlsm_session *session = arg; + PRFileDesc *fd; + + assert( sbiod != NULL ); + + p = LBER_MALLOC( sizeof( *p ) ); + if ( p == NULL ) { + return -1; + } + + fd = PR_GetIdentitiesLayer( session, tlsm_layer_id ); + if ( !fd ) { + LBER_FREE( p ); + return -1; + } + + fd->secret = (PRFilePrivate *)p; + p->session = session; + p->sbiod = sbiod; + p->firsttag = LBER_DEFAULT; + sbiod->sbiod_pvt = p; + return 0; +} + +static int +tlsm_sb_remove( Sockbuf_IO_Desc *sbiod ) +{ + struct tls_data *p; + + assert( sbiod != NULL ); + assert( sbiod->sbiod_pvt != NULL ); + + p = (struct tls_data *)sbiod->sbiod_pvt; + PR_Close( p->session ); + LBER_FREE( sbiod->sbiod_pvt ); + sbiod->sbiod_pvt = NULL; + return 0; +} + +static int +tlsm_sb_close( Sockbuf_IO_Desc *sbiod ) +{ + struct tls_data *p; + + assert( sbiod != NULL ); + assert( sbiod->sbiod_pvt != NULL ); + + p = (struct tls_data *)sbiod->sbiod_pvt; + PR_Shutdown( p->session, PR_SHUTDOWN_BOTH ); + return 0; +} + +static int +tlsm_sb_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg ) +{ + struct tls_data *p; + + assert( sbiod != NULL ); + assert( sbiod->sbiod_pvt != NULL ); + + p = (struct tls_data *)sbiod->sbiod_pvt; + + if ( opt == LBER_SB_OPT_GET_SSL ) { + *((tlsm_session **)arg) = p->session; + return 1; + + } else if ( opt == LBER_SB_OPT_DATA_READY ) { + if ( p && ( SSL_DataPending( p->session ) > 0 ) ) { + return 1; + } + + } + + return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg ); +} + +static ber_slen_t +tlsm_sb_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) +{ + struct tls_data *p; + ber_slen_t ret; + int err; + + assert( sbiod != NULL ); + assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); + + p = (struct tls_data *)sbiod->sbiod_pvt; + + ret = PR_Recv( p->session, buf, len, 0, PR_INTERVAL_NO_TIMEOUT ); + if ( ret < 0 ) { + err = PR_GetError(); + if ( err == PR_PENDING_INTERRUPT_ERROR || err == PR_WOULD_BLOCK_ERROR ) { + sbiod->sbiod_sb->sb_trans_needs_read = 1; + sock_errset(EWOULDBLOCK); + } + } else { + sbiod->sbiod_sb->sb_trans_needs_read = 0; + } + return ret; +} + +static ber_slen_t +tlsm_sb_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len) +{ + struct tls_data *p; + ber_slen_t ret; + int err; + + assert( sbiod != NULL ); + assert( SOCKBUF_VALID( sbiod->sbiod_sb ) ); + + p = (struct tls_data *)sbiod->sbiod_pvt; + + ret = PR_Send( p->session, (char *)buf, len, 0, PR_INTERVAL_NO_TIMEOUT ); + if ( ret < 0 ) { + err = PR_GetError(); + if ( err == PR_PENDING_INTERRUPT_ERROR || err == PR_WOULD_BLOCK_ERROR ) { + sbiod->sbiod_sb->sb_trans_needs_write = 1; + sock_errset(EWOULDBLOCK); + ret = 0; + } + } else { + sbiod->sbiod_sb->sb_trans_needs_write = 0; + } + return ret; +} + +static Sockbuf_IO tlsm_sbio = +{ + tlsm_sb_setup, /* sbi_setup */ + tlsm_sb_remove, /* sbi_remove */ + tlsm_sb_ctrl, /* sbi_ctrl */ + tlsm_sb_read, /* sbi_read */ + tlsm_sb_write, /* sbi_write */ + tlsm_sb_close /* sbi_close */ +}; + +tls_impl ldap_int_tls_impl = { + "MozNSS", + + tlsm_init, + tlsm_destroy, + + tlsm_ctx_new, + tlsm_ctx_ref, + tlsm_ctx_free, + tlsm_ctx_init, + + tlsm_session_new, + tlsm_session_connect, + tlsm_session_accept, + tlsm_session_upflags, + tlsm_session_errmsg, + tlsm_session_my_dn, + tlsm_session_peer_dn, + tlsm_session_chkhost, + tlsm_session_strength, + + &tlsm_sbio, + +#ifdef LDAP_R_COMPILE + tlsm_thr_init, +#else + NULL, +#endif + + 0 +}; + +#endif /* HAVE_MOZNSS */ +/* + emacs settings + Local Variables: + indent-tabs-mode: t + tab-width: 4 + End: +*/ |