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-rw-r--r--src/tls/tls.h765
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diff --git a/src/tls/tls.h b/src/tls/tls.h
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+++ b/src/tls/tls.h
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+#ifndef _TLS_H_INCLUDED_
+#define _TLS_H_INCLUDED_
+
+/*++
+/* NAME
+/* tls 3h
+/* SUMMARY
+/* libtls internal interfaces
+/* SYNOPSIS
+/* #include <tls.h>
+/* DESCRIPTION
+/* .nf
+
+ /*
+ * Utility library.
+ */
+#include <name_code.h>
+#include <argv.h>
+
+ /*
+ * TLS enforcement levels. Non-sentinel values may also be used to indicate
+ * the actual security level of a session.
+ *
+ * XXX TLS_LEV_NOTFOUND no longer belongs in this list. The SMTP client will
+ * have to use something else to report that policy table lookup failed.
+ *
+ * The order of levels matters, but we hide most of the details in macros.
+ *
+ * "dane" vs. "fingerprint", both must lie between "encrypt" and "verify".
+ *
+ * - With "may" and higher, TLS is enabled.
+ *
+ * - With "encrypt" and higher, TLS encryption must be applied.
+ *
+ * - Strictly above "encrypt", the peer certificate must match.
+ *
+ * - At "dane" and higher, the peer certificate must also be trusted. With
+ * "dane" the trust may be self-asserted, so we only log trust verification
+ * errors when TA associations are involved.
+ */
+#define TLS_LEV_INVALID -2 /* sentinel */
+#define TLS_LEV_NOTFOUND -1 /* XXX not in policy table */
+#define TLS_LEV_NONE 0 /* plain-text only */
+#define TLS_LEV_MAY 1 /* wildcard */
+#define TLS_LEV_ENCRYPT 2 /* encrypted connection */
+#define TLS_LEV_FPRINT 3 /* "peer" CA-less verification */
+#define TLS_LEV_HALF_DANE 4 /* DANE TLSA MX host, insecure MX RR */
+#define TLS_LEV_DANE 5 /* Opportunistic TLSA policy */
+#define TLS_LEV_DANE_ONLY 6 /* Required TLSA policy */
+#define TLS_LEV_VERIFY 7 /* certificate verified */
+#define TLS_LEV_SECURE 8 /* "secure" verification */
+
+#define TLS_REQUIRED(l) ((l) > TLS_LEV_MAY)
+#define TLS_MUST_MATCH(l) ((l) > TLS_LEV_ENCRYPT)
+#define TLS_MUST_TRUST(l) ((l) >= TLS_LEV_HALF_DANE)
+#define TLS_MUST_PKIX(l) ((l) >= TLS_LEV_VERIFY)
+#define TLS_OPPORTUNISTIC(l) ((l) == TLS_LEV_MAY || (l) == TLS_LEV_DANE)
+#define TLS_DANE_BASED(l) \
+ ((l) >= TLS_LEV_HALF_DANE && (l) <= TLS_LEV_DANE_ONLY)
+#define TLS_NEVER_SECURED(l) ((l) == TLS_LEV_HALF_DANE)
+
+extern int tls_level_lookup(const char *);
+extern const char *str_tls_level(int);
+
+#ifdef USE_TLS
+
+ /*
+ * OpenSSL library.
+ */
+#include <openssl/lhash.h>
+#include <openssl/bn.h>
+#include <openssl/err.h>
+#include <openssl/pem.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include <openssl/rand.h>
+#include <openssl/crypto.h> /* Legacy SSLEAY_VERSION_NUMBER */
+#include <openssl/opensslv.h> /* OPENSSL_VERSION_NUMBER */
+#include <openssl/ssl.h>
+#include <openssl/conf.h>
+
+ /* Appease indent(1) */
+#define x509_stack_t STACK_OF(X509)
+#define general_name_stack_t STACK_OF(GENERAL_NAME)
+#define ssl_cipher_stack_t STACK_OF(SSL_CIPHER)
+#define ssl_comp_stack_t STACK_OF(SSL_COMP)
+
+ /*-
+ * Official way to check minimum OpenSSL API version from 3.0 onward.
+ * We simply define it false for all prior versions, where we typically also
+ * need the patch level to determine API compatibility.
+ */
+#ifndef OPENSSL_VERSION_PREREQ
+#define OPENSSL_VERSION_PREREQ(m,n) 0
+#endif
+
+
+#if (OPENSSL_VERSION_NUMBER < 0x1000200fUL)
+#error "OpenSSL releases prior to 1.0.2 are no longer supported"
+#endif
+
+ /* Backwards compatibility with OpenSSL < 1.1.0 */
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#define OpenSSL_version_num SSLeay
+#define OpenSSL_version SSLeay_version
+#define OPENSSL_VERSION SSLEAY_VERSION
+#define X509_STORE_up_ref(store) \
+ CRYPTO_add(&((store)->references), 1, CRYPTO_LOCK_X509)
+#define X509_up_ref(x) \
+ CRYPTO_add(&((x)->references), 1, CRYPTO_LOCK_X509)
+#define EVP_PKEY_up_ref(k) \
+ CRYPTO_add(&((k)->references), 1, CRYPTO_LOCK_EVP_PKEY)
+#define X509_STORE_CTX_get0_cert(ctx) ((ctx)->cert)
+#define X509_STORE_CTX_get0_untrusted(ctx) ((ctx)->untrusted)
+#define X509_STORE_CTX_set0_untrusted X509_STORE_CTX_set_chain
+#define X509_STORE_CTX_set0_trusted_stack X509_STORE_CTX_trusted_stack
+#define ASN1_STRING_get0_data ASN1_STRING_data
+#define X509_getm_notBefore X509_get_notBefore
+#define X509_getm_notAfter X509_get_notAfter
+#define TLS_method SSLv23_method
+#define TLS_client_method SSLv23_client_method
+#define TLS_server_method SSLv23_server_method
+#define EVP_MD_CTX_new EVP_MD_CTX_create
+#define EVP_MD_CTX_free EVP_MD_CTX_destroy
+#endif
+
+ /* Backwards compatibility with OpenSSL < 1.1.1 */
+#if OPENSSL_VERSION_NUMBER < 0x1010100fUL
+#define SSL_CTX_set_num_tickets(ctx, num) ((void)0)
+#endif
+
+ /*-
+ * Backwards compatibility with OpenSSL < 1.1.1a.
+ *
+ * In OpenSSL 1.1.1a the client-only interface SSL_get_server_tmp_key() was
+ * updated to work on both the client and the server, and was renamed to
+ * SSL_get_peer_tmp_key(), with the original name left behind as an alias. We
+ * use the new name when available.
+ */
+#if OPENSSL_VERSION_NUMBER < 0x1010101fUL
+#undef SSL_get_signature_nid
+#define SSL_get_signature_nid(ssl, pnid) (NID_undef)
+#define tls_get_peer_dh_pubkey SSL_get_server_tmp_key
+#else
+#define tls_get_peer_dh_pubkey SSL_get_peer_tmp_key
+#endif
+
+ /*
+ * Utility library.
+ */
+#include <vstream.h>
+#include <name_mask.h>
+#include <name_code.h>
+
+ /*
+ * TLS library.
+ */
+#include <dns.h>
+
+ /*
+ * TLS role, presently for logging.
+ */
+typedef enum {
+ TLS_ROLE_CLIENT, TLS_ROLE_SERVER,
+} TLS_ROLE;
+
+typedef enum {
+ TLS_USAGE_NEW, TLS_USAGE_USED,
+} TLS_USAGE;
+
+ /*
+ * Names of valid tlsmgr(8) session caches.
+ */
+#define TLS_MGR_SCACHE_SMTPD "smtpd"
+#define TLS_MGR_SCACHE_SMTP "smtp"
+#define TLS_MGR_SCACHE_LMTP "lmtp"
+
+ /*
+ * RFC 6698, 7671, 7672 DANE
+ */
+#define TLS_DANE_TA 0 /* Match trust-anchor digests */
+#define TLS_DANE_EE 1 /* Match end-entity digests */
+
+#define TLS_DANE_CERT 0 /* Match the certificate digest */
+#define TLS_DANE_PKEY 1 /* Match the public key digest */
+
+#define TLS_DANE_FLAG_NORRS (1<<0) /* Nothing found in DNS */
+#define TLS_DANE_FLAG_EMPTY (1<<1) /* Nothing usable found in DNS */
+#define TLS_DANE_FLAG_ERROR (1<<2) /* TLSA record lookup error */
+
+#define tls_dane_unusable(dane) ((dane)->flags & TLS_DANE_FLAG_EMPTY)
+#define tls_dane_notfound(dane) ((dane)->flags & TLS_DANE_FLAG_NORRS)
+
+#define TLS_DANE_CACHE_TTL_MIN 1 /* A lot can happen in ~2 seconds */
+#define TLS_DANE_CACHE_TTL_MAX 100 /* Comparable to max_idle */
+
+ /*
+ * Certificate and public key digests (typically from TLSA RRs), grouped by
+ * algorithm.
+ */
+typedef struct TLS_TLSA {
+ char *mdalg; /* Algorithm for this digest list */
+ ARGV *certs; /* Complete certificate digests */
+ ARGV *pkeys; /* SubjectPublicKeyInfo digests */
+ struct TLS_TLSA *next; /* Chain to next algorithm */
+} TLS_TLSA;
+
+ /*
+ * Linked list of full X509 trust-anchor certs.
+ */
+typedef struct TLS_CERTS {
+ X509 *cert;
+ struct TLS_CERTS *next;
+} TLS_CERTS;
+
+ /*
+ * Linked list of full EVP_PKEY trust-anchor public keys.
+ */
+typedef struct TLS_PKEYS {
+ EVP_PKEY *pkey;
+ struct TLS_PKEYS *next;
+} TLS_PKEYS;
+
+typedef struct TLS_DANE {
+ TLS_TLSA *ta; /* Trust-anchor cert/pubkey digests */
+ TLS_TLSA *ee; /* End-entity cert/pubkey digests */
+ TLS_CERTS *certs; /* Full trust-anchor certificates */
+ TLS_PKEYS *pkeys; /* Full trust-anchor public keys */
+ char *base_domain; /* Base domain of TLSA RRset */
+ int flags; /* Lookup status */
+ time_t expires; /* Expiration time of this record */
+ int refs; /* Reference count */
+} TLS_DANE;
+
+#define TLS_DANE_HASTA(d) ((d) ? (d)->ta : 0)
+#define TLS_DANE_HASEE(d) ((d) ? (d)->ee : 0)
+
+ /*
+ * tls_dane.c
+ */
+extern int tls_dane_avail(void);
+extern void tls_dane_flush(void);
+extern void tls_dane_verbose(int);
+extern TLS_DANE *tls_dane_alloc(void);
+extern void tls_dane_add_ee_digests(TLS_DANE *, const char *, const char *,
+ const char *);
+extern void tls_dane_free(TLS_DANE *);
+extern TLS_DANE *tls_dane_resolve(unsigned, const char *, DNS_RR *, int);
+extern int tls_dane_load_trustfile(TLS_DANE *, const char *);
+
+ /*
+ * TLS session context, also used by the VSTREAM call-back routines for SMTP
+ * input/output, and by OpenSSL call-back routines for key verification.
+ *
+ * Only some members are (read-only) accessible by the public.
+ */
+#define CCERT_BUFSIZ 256
+
+typedef struct {
+ /* Public, read-only. */
+ char *peer_CN; /* Peer Common Name */
+ char *issuer_CN; /* Issuer Common Name */
+ char *peer_sni; /* SNI sent to or by the peer */
+ char *peer_cert_fprint; /* ASCII certificate fingerprint */
+ char *peer_pkey_fprint; /* ASCII public key fingerprint */
+ int peer_status; /* Certificate and match status */
+ const char *protocol;
+ const char *cipher_name;
+ int cipher_usebits;
+ int cipher_algbits;
+ const char *kex_name; /* shared key-exchange algorithm */
+ const char *kex_curve; /* shared key-exchange ECDHE curve */
+ int kex_bits; /* shared FFDHE key exchange bits */
+ const char *clnt_sig_name; /* client's signature key algorithm */
+ const char *clnt_sig_curve; /* client's ECDSA curve name */
+ int clnt_sig_bits; /* client's RSA signature key bits */
+ const char *clnt_sig_dgst; /* client's signature digest */
+ const char *srvr_sig_name; /* server's signature key algorithm */
+ const char *srvr_sig_curve; /* server's ECDSA curve name */
+ int srvr_sig_bits; /* server's RSA signature key bits */
+ const char *srvr_sig_dgst; /* server's signature digest */
+ /* Private. */
+ SSL *con;
+ char *cache_type; /* tlsmgr(8) cache type if enabled */
+ int ticketed; /* Session ticket issued */
+ char *serverid; /* unique server identifier */
+ char *namaddr; /* nam[addr] for logging */
+ int log_mask; /* What to log */
+ int session_reused; /* this session was reused */
+ int am_server; /* Are we an SSL server or client? */
+ const char *mdalg; /* default message digest algorithm */
+ /* Built-in vs external SSL_accept/read/write/shutdown support. */
+ VSTREAM *stream; /* Blocking-mode SMTP session */
+ /* DANE TLSA trust input and verification state */
+ const TLS_DANE *dane; /* DANE TLSA digests */
+ int errordepth; /* Chain depth of error cert */
+ int tadepth; /* Chain depth of trust anchor */
+ int errorcode; /* First error at error depth */
+ X509 *errorcert; /* Error certificate closest to leaf */
+ x509_stack_t *untrusted; /* Certificate chain fodder */
+ x509_stack_t *trusted; /* Internal root CA list */
+} TLS_SESS_STATE;
+
+ /*
+ * Peer status bits. TLS_CERT_FLAG_MATCHED implies TLS_CERT_FLAG_TRUSTED
+ * only in the case of a hostname match.
+ */
+#define TLS_CERT_FLAG_PRESENT (1<<0)
+#define TLS_CERT_FLAG_ALTNAME (1<<1)
+#define TLS_CERT_FLAG_TRUSTED (1<<2)
+#define TLS_CERT_FLAG_MATCHED (1<<3)
+#define TLS_CERT_FLAG_SECURED (1<<4)
+
+#define TLS_CERT_IS_PRESENT(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_PRESENT))
+#define TLS_CERT_IS_ALTNAME(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_ALTNAME))
+#define TLS_CERT_IS_TRUSTED(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_TRUSTED))
+#define TLS_CERT_IS_MATCHED(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_MATCHED))
+#define TLS_CERT_IS_SECURED(c) ((c) && ((c)->peer_status&TLS_CERT_FLAG_SECURED))
+
+ /*
+ * Opaque client context handle.
+ */
+typedef struct TLS_APPL_STATE TLS_APPL_STATE;
+
+#ifdef TLS_INTERNAL
+
+ /*
+ * Log mask details are internal to the library.
+ */
+extern int tls_log_mask(const char *, const char *);
+
+ /*
+ * What to log.
+ */
+#define TLS_LOG_NONE (1<<0)
+#define TLS_LOG_SUMMARY (1<<1)
+#define TLS_LOG_UNTRUSTED (1<<2)
+#define TLS_LOG_PEERCERT (1<<3)
+#define TLS_LOG_CERTMATCH (1<<4)
+#define TLS_LOG_VERBOSE (1<<5)
+#define TLS_LOG_CACHE (1<<6)
+#define TLS_LOG_DEBUG (1<<7)
+#define TLS_LOG_TLSPKTS (1<<8)
+#define TLS_LOG_ALLPKTS (1<<9)
+
+ /*
+ * Client and Server application contexts
+ */
+struct TLS_APPL_STATE {
+ SSL_CTX *ssl_ctx;
+ SSL_CTX *sni_ctx;
+ int log_mask;
+ char *cache_type;
+};
+
+ /*
+ * tls_misc.c Application-context update and disposal.
+ */
+extern void tls_update_app_logmask(TLS_APPL_STATE *, int);
+extern void tls_free_app_context(TLS_APPL_STATE *);
+
+ /*
+ * tls_misc.c
+ */
+extern void tls_param_init(void);
+extern int tls_library_init(void);
+
+ /*
+ * Protocol selection.
+ */
+#define TLS_PROTOCOL_INVALID (~0) /* All protocol bits masked */
+
+#ifdef SSL_TXT_SSLV2
+#define TLS_PROTOCOL_SSLv2 (1<<0) /* SSLv2 */
+#else
+#define SSL_TXT_SSLV2 "SSLv2"
+#define TLS_PROTOCOL_SSLv2 0 /* Unknown */
+#undef SSL_OP_NO_SSLv2
+#define SSL_OP_NO_SSLv2 0L /* Noop */
+#endif
+
+#ifdef SSL_TXT_SSLV3
+#define TLS_PROTOCOL_SSLv3 (1<<1) /* SSLv3 */
+#else
+#define SSL_TXT_SSLV3 "SSLv3"
+#define TLS_PROTOCOL_SSLv3 0 /* Unknown */
+#undef SSL_OP_NO_SSLv3
+#define SSL_OP_NO_SSLv3 0L /* Noop */
+#endif
+
+#ifdef SSL_TXT_TLSV1
+#define TLS_PROTOCOL_TLSv1 (1<<2) /* TLSv1 */
+#else
+#define SSL_TXT_TLSV1 "TLSv1"
+#define TLS_PROTOCOL_TLSv1 0 /* Unknown */
+#undef SSL_OP_NO_TLSv1
+#define SSL_OP_NO_TLSv1 0L /* Noop */
+#endif
+
+#ifdef SSL_TXT_TLSV1_1
+#define TLS_PROTOCOL_TLSv1_1 (1<<3) /* TLSv1_1 */
+#else
+#define SSL_TXT_TLSV1_1 "TLSv1.1"
+#define TLS_PROTOCOL_TLSv1_1 0 /* Unknown */
+#undef SSL_OP_NO_TLSv1_1
+#define SSL_OP_NO_TLSv1_1 0L /* Noop */
+#endif
+
+#ifdef SSL_TXT_TLSV1_2
+#define TLS_PROTOCOL_TLSv1_2 (1<<4) /* TLSv1_2 */
+#else
+#define SSL_TXT_TLSV1_2 "TLSv1.2"
+#define TLS_PROTOCOL_TLSv1_2 0 /* Unknown */
+#undef SSL_OP_NO_TLSv1_2
+#define SSL_OP_NO_TLSv1_2 0L /* Noop */
+#endif
+
+ /*
+ * OpenSSL 1.1.1 does not define a TXT macro for TLS 1.3, so we roll our
+ * own.
+ */
+#define TLS_PROTOCOL_TXT_TLSV1_3 "TLSv1.3"
+
+#if defined(TLS1_3_VERSION) && defined(SSL_OP_NO_TLSv1_3)
+#define TLS_PROTOCOL_TLSv1_3 (1<<5) /* TLSv1_3 */
+#else
+#define TLS_PROTOCOL_TLSv1_3 0 /* Unknown */
+#undef SSL_OP_NO_TLSv1_3
+#define SSL_OP_NO_TLSv1_3 0L /* Noop */
+#endif
+
+/*
+ * Always used when defined, SMTP has no truncation attacks.
+ */
+#ifndef SSL_OP_IGNORE_UNEXPECTED_EOF
+#define SSL_OP_IGNORE_UNEXPECTED_EOF 0L
+#endif
+
+#define TLS_KNOWN_PROTOCOLS \
+ ( TLS_PROTOCOL_SSLv2 | TLS_PROTOCOL_SSLv3 | TLS_PROTOCOL_TLSv1 \
+ | TLS_PROTOCOL_TLSv1_1 | TLS_PROTOCOL_TLSv1_2 | TLS_PROTOCOL_TLSv1_3 )
+#define TLS_SSL_OP_PROTOMASK(m) \
+ ((((m) & TLS_PROTOCOL_SSLv2) ? SSL_OP_NO_SSLv2 : 0L) \
+ | (((m) & TLS_PROTOCOL_SSLv3) ? SSL_OP_NO_SSLv3 : 0L) \
+ | (((m) & TLS_PROTOCOL_TLSv1) ? SSL_OP_NO_TLSv1 : 0L) \
+ | (((m) & TLS_PROTOCOL_TLSv1_1) ? SSL_OP_NO_TLSv1_1 : 0L) \
+ | (((m) & TLS_PROTOCOL_TLSv1_2) ? SSL_OP_NO_TLSv1_2 : 0L) \
+ | (((m) & TLS_PROTOCOL_TLSv1_3) ? SSL_OP_NO_TLSv1_3 : 0L))
+
+/*
+ * SSL options that are managed via dedicated Postfix features, rather than
+ * just exposed via hex codes or named elements of tls_ssl_options.
+ */
+#define TLS_SSL_OP_MANAGED_BITS \
+ (SSL_OP_CIPHER_SERVER_PREFERENCE | SSL_OP_IGNORE_UNEXPECTED_EOF | \
+ TLS_SSL_OP_PROTOMASK(~0))
+
+extern int tls_protocol_mask(const char *);
+
+ /*
+ * Cipher grade selection.
+ */
+#define TLS_CIPHER_NONE 0
+#define TLS_CIPHER_NULL 1
+#define TLS_CIPHER_EXPORT 2
+#define TLS_CIPHER_LOW 3
+#define TLS_CIPHER_MEDIUM 4
+#define TLS_CIPHER_HIGH 5
+
+extern const NAME_CODE tls_cipher_grade_table[];
+
+#define tls_cipher_grade(str) \
+ name_code(tls_cipher_grade_table, NAME_CODE_FLAG_NONE, (str))
+#define str_tls_cipher_grade(gr) \
+ str_name_code(tls_cipher_grade_table, (gr))
+
+ /*
+ * Cipher lists with exclusions.
+ */
+extern const char *tls_set_ciphers(TLS_SESS_STATE *, const char *,
+ const char *);
+
+ /*
+ * Populate TLS context with TLS 1.3-related signature parameters.
+ */
+extern void tls_get_signature_params(TLS_SESS_STATE *);
+
+#endif /* TLS_INTERNAL */
+
+ /*
+ * tls_client.c
+ */
+typedef struct {
+ const char *log_param;
+ const char *log_level;
+ int verifydepth;
+ const char *cache_type;
+ const char *chain_files;
+ const char *cert_file;
+ const char *key_file;
+ const char *dcert_file;
+ const char *dkey_file;
+ const char *eccert_file;
+ const char *eckey_file;
+ const char *CAfile;
+ const char *CApath;
+ const char *mdalg; /* default message digest algorithm */
+} TLS_CLIENT_INIT_PROPS;
+
+typedef struct {
+ TLS_APPL_STATE *ctx;
+ VSTREAM *stream;
+ int fd; /* Event-driven file descriptor */
+ int timeout;
+ int tls_level; /* Security level */
+ const char *nexthop; /* destination domain */
+ const char *host; /* MX hostname */
+ const char *namaddr; /* nam[addr] for logging */
+ const char *sni; /* optional SNI name when not DANE */
+ const char *serverid; /* Session cache key */
+ const char *helo; /* Server name from EHLO response */
+ const char *protocols; /* Enabled protocols */
+ const char *cipher_grade; /* Minimum cipher grade */
+ const char *cipher_exclusions; /* Ciphers to exclude */
+ const ARGV *matchargv; /* Cert match patterns */
+ const char *mdalg; /* default message digest algorithm */
+ const TLS_DANE *dane; /* DANE TLSA verification */
+} TLS_CLIENT_START_PROPS;
+
+extern TLS_APPL_STATE *tls_client_init(const TLS_CLIENT_INIT_PROPS *);
+extern TLS_SESS_STATE *tls_client_start(const TLS_CLIENT_START_PROPS *);
+extern TLS_SESS_STATE *tls_client_post_connect(TLS_SESS_STATE *,
+ const TLS_CLIENT_START_PROPS *);
+
+#define tls_client_stop(ctx, stream, timeout, failure, TLScontext) \
+ tls_session_stop(ctx, (stream), (timeout), (failure), (TLScontext))
+
+#define TLS_CLIENT_INIT_ARGS(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
+ a10, a11, a12, a13, a14) \
+ (((props)->a1), ((props)->a2), ((props)->a3), \
+ ((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
+ ((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
+ ((props)->a12), ((props)->a13), ((props)->a14), (props))
+
+#define TLS_CLIENT_INIT(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
+ a10, a11, a12, a13, a14) \
+ tls_client_init(TLS_CLIENT_INIT_ARGS(props, a1, a2, a3, a4, a5, \
+ a6, a7, a8, a9, a10, a11, a12, a13, a14))
+
+#define TLS_CLIENT_START(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
+ a10, a11, a12, a13, a14, a15, a16, a17) \
+ tls_client_start((((props)->a1), ((props)->a2), ((props)->a3), \
+ ((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
+ ((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
+ ((props)->a12), ((props)->a13), ((props)->a14), ((props)->a15), \
+ ((props)->a16), ((props)->a17), (props)))
+
+ /*
+ * tls_server.c
+ */
+typedef struct {
+ const char *log_param;
+ const char *log_level;
+ int verifydepth;
+ const char *cache_type;
+ int set_sessid;
+ const char *chain_files;
+ const char *cert_file;
+ const char *key_file;
+ const char *dcert_file;
+ const char *dkey_file;
+ const char *eccert_file;
+ const char *eckey_file;
+ const char *CAfile;
+ const char *CApath;
+ const char *protocols;
+ const char *eecdh_grade;
+ const char *dh1024_param_file;
+ const char *dh512_param_file;
+ int ask_ccert;
+ const char *mdalg; /* default message digest algorithm */
+} TLS_SERVER_INIT_PROPS;
+
+typedef struct {
+ TLS_APPL_STATE *ctx; /* TLS application context */
+ VSTREAM *stream; /* Client stream */
+ int fd; /* Event-driven file descriptor */
+ int timeout; /* TLS handshake timeout */
+ int requirecert; /* Insist on client cert? */
+ const char *serverid; /* Server instance (salt cache key) */
+ const char *namaddr; /* Client nam[addr] for logging */
+ const char *cipher_grade;
+ const char *cipher_exclusions;
+ const char *mdalg; /* default message digest algorithm */
+} TLS_SERVER_START_PROPS;
+
+extern TLS_APPL_STATE *tls_server_init(const TLS_SERVER_INIT_PROPS *);
+extern TLS_SESS_STATE *tls_server_start(const TLS_SERVER_START_PROPS *props);
+extern TLS_SESS_STATE *tls_server_post_accept(TLS_SESS_STATE *);
+
+#define tls_server_stop(ctx, stream, timeout, failure, TLScontext) \
+ tls_session_stop(ctx, (stream), (timeout), (failure), (TLScontext))
+
+#define TLS_SERVER_INIT(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
+ a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20) \
+ tls_server_init((((props)->a1), ((props)->a2), ((props)->a3), \
+ ((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
+ ((props)->a8), ((props)->a9), ((props)->a10), ((props)->a11), \
+ ((props)->a12), ((props)->a13), ((props)->a14), ((props)->a15), \
+ ((props)->a16), ((props)->a17), ((props)->a18), ((props)->a19), \
+ ((props)->a20), (props)))
+
+#define TLS_SERVER_START(props, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10) \
+ tls_server_start((((props)->a1), ((props)->a2), ((props)->a3), \
+ ((props)->a4), ((props)->a5), ((props)->a6), ((props)->a7), \
+ ((props)->a8), ((props)->a9), ((props)->a10), (props)))
+
+ /*
+ * tls_session.c
+ */
+extern void tls_session_stop(TLS_APPL_STATE *, VSTREAM *, int, int, TLS_SESS_STATE *);
+
+ /*
+ * tls_misc.c
+ */
+extern const char *tls_compile_version(void);
+extern const char *tls_run_version(void);
+extern const char **tls_pkey_algorithms(void);
+extern void tls_log_summary(TLS_ROLE, TLS_USAGE, TLS_SESS_STATE *);
+extern void tls_pre_jail_init(TLS_ROLE);
+
+#ifdef TLS_INTERNAL
+
+#include <vstring.h>
+
+extern VSTRING *tls_session_passivate(SSL_SESSION *);
+extern SSL_SESSION *tls_session_activate(const char *, int);
+
+ /*
+ * tls_stream.c.
+ */
+extern void tls_stream_start(VSTREAM *, TLS_SESS_STATE *);
+extern void tls_stream_stop(VSTREAM *);
+
+ /*
+ * tls_bio_ops.c: a generic multi-personality driver that retries SSL
+ * operations until they are satisfied or until a hard error happens.
+ * Because of its ugly multi-personality user interface we invoke it via
+ * not-so-ugly single-personality wrappers.
+ */
+extern int tls_bio(int, int, TLS_SESS_STATE *,
+ int (*) (SSL *), /* handshake */
+ int (*) (SSL *, void *, int), /* read */
+ int (*) (SSL *, const void *, int), /* write */
+ void *, int);
+
+#define tls_bio_connect(fd, timeout, context) \
+ tls_bio((fd), (timeout), (context), SSL_connect, \
+ NULL, NULL, NULL, 0)
+#define tls_bio_accept(fd, timeout, context) \
+ tls_bio((fd), (timeout), (context), SSL_accept, \
+ NULL, NULL, NULL, 0)
+#define tls_bio_shutdown(fd, timeout, context) \
+ tls_bio((fd), (timeout), (context), SSL_shutdown, \
+ NULL, NULL, NULL, 0)
+#define tls_bio_read(fd, buf, len, timeout, context) \
+ tls_bio((fd), (timeout), (context), NULL, \
+ SSL_read, NULL, (buf), (len))
+#define tls_bio_write(fd, buf, len, timeout, context) \
+ tls_bio((fd), (timeout), (context), NULL, \
+ NULL, SSL_write, (buf), (len))
+
+ /*
+ * tls_dh.c
+ */
+extern void tls_set_dh_from_file(const char *, int);
+extern DH *tls_tmp_dh_cb(SSL *, int, int);
+extern void tls_set_eecdh_curve(SSL_CTX *, const char *);
+extern void tls_auto_eecdh_curves(SSL_CTX *, const char *);
+
+ /*
+ * tls_rsa.c
+ */
+extern RSA *tls_tmp_rsa_cb(SSL *, int, int);
+
+ /*
+ * tls_verify.c
+ */
+extern char *tls_peer_CN(X509 *, const TLS_SESS_STATE *);
+extern char *tls_issuer_CN(X509 *, const TLS_SESS_STATE *);
+extern const char *tls_dns_name(const GENERAL_NAME *, const TLS_SESS_STATE *);
+extern int tls_verify_certificate_callback(int, X509_STORE_CTX *);
+extern void tls_log_verify_error(TLS_SESS_STATE *);
+
+ /*
+ * tls_dane.c
+ */
+extern int tls_dane_match(TLS_SESS_STATE *, int, X509 *, int);
+extern void tls_dane_set_callback(SSL_CTX *, TLS_SESS_STATE *);
+
+ /*
+ * tls_fprint.c
+ */
+extern const EVP_MD *tls_digest_byname(const char *, EVP_MD_CTX **);
+extern char *tls_digest_encode(const unsigned char *, int);
+extern char *tls_data_fprint(const char *, int, const char *);
+extern char *tls_cert_fprint(X509 *, const char *);
+extern char *tls_pkey_fprint(X509 *, const char *);
+extern char *tls_serverid_digest(const TLS_CLIENT_START_PROPS *, long,
+ const char *);
+
+ /*
+ * tls_certkey.c
+ */
+extern int tls_set_ca_certificate_info(SSL_CTX *, const char *, const char *);
+extern int tls_load_pem_chain(SSL *, const char *, const char *);
+extern int tls_set_my_certificate_key_info(SSL_CTX *, /* All */ const char *,
+ /* RSA */ const char *, const char *,
+ /* DSA */ const char *, const char *,
+ /* ECDSA */ const char *, const char *);
+
+ /*
+ * tls_misc.c
+ */
+extern int TLScontext_index;
+
+extern TLS_APPL_STATE *tls_alloc_app_context(SSL_CTX *, SSL_CTX *, int);
+extern TLS_SESS_STATE *tls_alloc_sess_context(int, const char *);
+extern void tls_free_context(TLS_SESS_STATE *);
+extern void tls_check_version(void);
+extern long tls_bug_bits(void);
+extern void tls_print_errors(void);
+extern void tls_info_callback(const SSL *, int, int);
+extern long tls_bio_dump_cb(BIO *, int, const char *, int, long, long);
+extern int tls_validate_digest(const char *);
+
+ /*
+ * tls_seed.c
+ */
+extern void tls_int_seed(void);
+extern int tls_ext_seed(int);
+
+#endif /* TLS_INTERNAL */
+
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*
+/* Victor Duchovni
+/* Morgan Stanley
+/*--*/
+
+#endif /* USE_TLS */
+#endif /* _TLS_H_INCLUDED_ */
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