diff options
Diffstat (limited to 'vio/viosslfactories.c')
| -rw-r--r-- | vio/viosslfactories.c | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/vio/viosslfactories.c b/vio/viosslfactories.c new file mode 100644 index 00000000..289c28d4 --- /dev/null +++ b/vio/viosslfactories.c @@ -0,0 +1,526 @@ +/* Copyright (c) 2000, 2016, Oracle and/or its affiliates. + Copyright (c) 2011, 2016, MariaDB + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ + +#include "vio_priv.h" +#include <ssl_compat.h> + +#ifdef HAVE_OPENSSL +#include <openssl/dh.h> +#include <openssl/bn.h> + +static my_bool ssl_algorithms_added = FALSE; +static my_bool ssl_error_strings_loaded= FALSE; + +/* the function below was generated with "openssl dhparam -2 -C 2048" */ +#ifndef HAVE_WOLFSSL +static +DH *get_dh2048() +{ + static unsigned char dhp_2048[] = { + 0xA1,0xBB,0x7C,0x20,0xC5,0x5B,0xC0,0x7B,0x21,0x8B,0xD6,0xA8, + 0x15,0xFC,0x3B,0xBA,0xAB,0x9F,0xDF,0x68,0xC4,0x79,0x78,0x0D, + 0xC1,0x12,0x64,0xE4,0x15,0xC9,0x66,0xDB,0xF6,0xCB,0xB3,0x39, + 0x02,0x5B,0x78,0x62,0xFB,0x09,0xAE,0x09,0x6B,0xDD,0xD4,0x5D, + 0x97,0xBC,0xDC,0x7F,0xE6,0xD6,0xF1,0xCB,0xF5,0xEB,0xDA,0xA7, + 0x2E,0x5A,0x43,0x2B,0xE9,0x40,0xE2,0x85,0x00,0x1C,0xC0,0x0A, + 0x98,0x77,0xA9,0x31,0xDE,0x0B,0x75,0x4D,0x1E,0x1F,0x16,0x83, + 0xCA,0xDE,0xBD,0x21,0xFC,0xC1,0x82,0x37,0x36,0x33,0x0B,0x66, + 0x06,0x3C,0xF3,0xAF,0x21,0x57,0x57,0x80,0xF6,0x94,0x1B,0xA9, + 0xD4,0xF6,0x8F,0x18,0x62,0x0E,0xC4,0x22,0xF9,0x5B,0x62,0xCC, + 0x3F,0x19,0x95,0xCF,0x4B,0x00,0xA6,0x6C,0x0B,0xAF,0x9F,0xD5, + 0xFA,0x3D,0x6D,0xDA,0x30,0x83,0x07,0x91,0xAC,0x15,0xFF,0x8F, + 0x59,0x54,0xEA,0x25,0xBC,0x4E,0xEB,0x6A,0x54,0xDF,0x75,0x09, + 0x72,0x0F,0xEF,0x23,0x70,0xE0,0xA8,0x04,0xEA,0xFF,0x90,0x54, + 0xCD,0x84,0x18,0xC0,0x75,0x91,0x99,0x0F,0xA1,0x78,0x0C,0x07, + 0xB7,0xC5,0xDE,0x55,0x06,0x7B,0x95,0x68,0x2C,0x33,0x39,0xBC, + 0x2C,0xD0,0x6D,0xDD,0xFA,0xDC,0xB5,0x8F,0x82,0x39,0xF8,0x67, + 0x44,0xF1,0xD8,0xF7,0x78,0x11,0x9A,0x77,0x9B,0x53,0x47,0xD6, + 0x2B,0x5D,0x67,0xB8,0xB7,0xBC,0xC1,0xD7,0x79,0x62,0x15,0xC2, + 0xC5,0x83,0x97,0xA7,0xF8,0xB4,0x9C,0xF6,0x8F,0x9A,0xC7,0xDA, + 0x1B,0xBB,0x87,0x07,0xA7,0x71,0xAD,0xB2,0x8A,0x50,0xF8,0x26, + 0x12,0xB7,0x3E,0x0B, + }; + static unsigned char dhg_2048[] = { + 0x02 + }; + DH *dh = DH_new(); + BIGNUM *dhp_bn, *dhg_bn; + + if (dh == NULL) + return NULL; + dhp_bn = BN_bin2bn(dhp_2048, sizeof (dhp_2048), NULL); + dhg_bn = BN_bin2bn(dhg_2048, sizeof (dhg_2048), NULL); + if (dhp_bn == NULL || dhg_bn == NULL + || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) { + DH_free(dh); + BN_free(dhp_bn); + BN_free(dhg_bn); + return NULL; + } + return dh; +} +#endif + +static const char* +ssl_error_string[] = +{ + "No error", + "Unable to get certificate", + "Unable to get private key", + "Private key does not match the certificate public key", + "SSL_CTX_set_default_verify_paths failed", + "Failed to set ciphers to use", + "SSL_CTX_new failed", + "SSL_CTX_set_tmp_dh failed", + "Unknown TLS version" +}; + +const char* +sslGetErrString(enum enum_ssl_init_error e) +{ + DBUG_ASSERT(SSL_INITERR_NOERROR < e && e < SSL_INITERR_LASTERR); + return ssl_error_string[e]; +} + +static int +vio_set_cert_stuff(SSL_CTX *ctx, const char *cert_file, const char *key_file, + my_bool is_client, enum enum_ssl_init_error* error) +{ + DBUG_ENTER("vio_set_cert_stuff"); + DBUG_PRINT("enter", ("ctx: %p cert_file: %s key_file: %s", + ctx, cert_file, key_file)); + + if (!cert_file && key_file) + cert_file= key_file; + + if (!key_file && cert_file) + key_file= cert_file; + + if (cert_file && + SSL_CTX_use_certificate_chain_file(ctx, cert_file) <= 0) + { + *error= SSL_INITERR_CERT; + DBUG_PRINT("error",("%s from file '%s'", sslGetErrString(*error), cert_file)); + DBUG_EXECUTE("error", ERR_print_errors_fp(DBUG_FILE);); + fprintf(stderr, "SSL error: %s from '%s'\n", sslGetErrString(*error), + cert_file); + fflush(stderr); + DBUG_RETURN(1); + } + + if (key_file && + SSL_CTX_use_PrivateKey_file(ctx, key_file, SSL_FILETYPE_PEM) <= 0) + { + *error= SSL_INITERR_KEY; + DBUG_PRINT("error", ("%s from file '%s'", sslGetErrString(*error), key_file)); + DBUG_EXECUTE("error", ERR_print_errors_fp(DBUG_FILE);); + fprintf(stderr, "SSL error: %s from '%s'\n", sslGetErrString(*error), + key_file); + fflush(stderr); + DBUG_RETURN(1); + } + + /* + If certificate is used check if private key matches. + Note, that server side has to use certificate. + */ + if ((cert_file != NULL || !is_client) && !SSL_CTX_check_private_key(ctx)) + { + *error= SSL_INITERR_NOMATCH; + DBUG_PRINT("error", ("%s",sslGetErrString(*error))); + DBUG_EXECUTE("error", ERR_print_errors_fp(DBUG_FILE);); + fprintf(stderr, "SSL error: %s\n", sslGetErrString(*error)); + fflush(stderr); + DBUG_RETURN(1); + } + + DBUG_RETURN(0); +} + + +void vio_check_ssl_init() +{ + if (!ssl_algorithms_added) + { + ssl_algorithms_added= TRUE; + OPENSSL_init_ssl(0, NULL); + } + + if (!ssl_error_strings_loaded) + { + ssl_error_strings_loaded= TRUE; + SSL_load_error_strings(); + } +} + +#ifdef HAVE_WOLFSSL +static int wolfssl_recv(WOLFSSL* ssl, char* buf, int sz, void* vio) +{ + size_t ret; + (void)ssl; + ret = vio_read((Vio *)vio, (uchar *)buf, sz); + /* check if connection was closed */ + if (ret == 0) + return WOLFSSL_CBIO_ERR_CONN_CLOSE; + + return (int)ret; +} + +static int wolfssl_send(WOLFSSL* ssl, char* buf, int sz, void* vio) +{ + return (int)vio_write((Vio *)vio, (unsigned char*)buf, sz); +} +#endif /* HAVE_WOLFSSL */ + +static long vio_tls_protocol_options(ulonglong tls_version) +{ + long tls_protocol_flags= +#ifdef TLS1_3_VERSION + SSL_OP_NO_TLSv1_3 | +#endif +#if defined(TLS1_2_VERSION) || defined(HAVE_WOLFSSL) + SSL_OP_NO_TLSv1_2 | +#endif + SSL_OP_NO_TLSv1_1 | + SSL_OP_NO_TLSv1; + long disabled_tls_protocols= tls_protocol_flags, + disabled_ssl_protocols= SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3; + + if (!tls_version) + return disabled_ssl_protocols; + + if (tls_version & VIO_TLSv1_0) + disabled_tls_protocols&= ~SSL_OP_NO_TLSv1; + if (tls_version & VIO_TLSv1_1) + disabled_tls_protocols&= ~SSL_OP_NO_TLSv1_1; +#if defined(TLS1_2_VERSION) || defined(HAVE_WOLFSSL) + if (tls_version & VIO_TLSv1_2) + disabled_tls_protocols&= ~SSL_OP_NO_TLSv1_2; +#endif +#ifdef TLS1_3_VERSION + if (tls_version & VIO_TLSv1_3) + disabled_tls_protocols&= ~SSL_OP_NO_TLSv1_3; +#endif + + /* some garbage was specified in tls_version option */ + if (tls_protocol_flags == disabled_tls_protocols) + return -1; + return (disabled_tls_protocols | disabled_ssl_protocols); +} + +/************************ VioSSLFd **********************************/ +static struct st_VioSSLFd * +new_VioSSLFd(const char *key_file, const char *cert_file, + const char *ca_file, const char *ca_path, + const char *cipher, my_bool is_client_method, + enum enum_ssl_init_error *error, + const char *crl_file, const char *crl_path, ulonglong tls_version) +{ + struct st_VioSSLFd *ssl_fd; + long ssl_ctx_options; + DBUG_ENTER("new_VioSSLFd"); + + /* + If some optional parameters indicate empty strings, then + for compatibility with SSL libraries, replace them with NULL, + otherwise these libraries will try to open files with an empty + name, etc., and they will return an error code instead performing + the necessary operations: + */ + if (ca_file && !ca_file[0]) + { + ca_file = NULL; + } + if (ca_path && !ca_path[0]) + { + ca_path = NULL; + } + if (crl_file && !crl_file[0]) + { + crl_file = NULL; + } + if (crl_path && !crl_path[0]) + { + crl_path = NULL; + } + + DBUG_PRINT("enter", + ("key_file: '%s' cert_file: '%s' ca_file: '%s' ca_path: '%s' " + "cipher: '%s' crl_file: '%s' crl_path: '%s'", + key_file ? key_file : "NULL", + cert_file ? cert_file : "NULL", + ca_file ? ca_file : "NULL", + ca_path ? ca_path : "NULL", + cipher ? cipher : "NULL", + crl_file ? crl_file : "NULL", + crl_path ? crl_path : "NULL")); + + vio_check_ssl_init(); + + if (!(ssl_fd= ((struct st_VioSSLFd*) + my_malloc(key_memory_vio_ssl_fd, + sizeof(struct st_VioSSLFd), MYF(0))))) + goto err0; + if (!(ssl_fd->ssl_context= SSL_CTX_new(is_client_method ? + SSLv23_client_method() : + SSLv23_server_method()))) + { + *error= SSL_INITERR_MEMFAIL; + DBUG_PRINT("error", ("%s", sslGetErrString(*error))); + goto err1; + } + + ssl_ctx_options= vio_tls_protocol_options(tls_version); + if (ssl_ctx_options == -1) + { + *error= SSL_INITERR_PROTOCOL; + DBUG_PRINT("error", ("%s", sslGetErrString(*error))); + goto err1; + } + + SSL_CTX_set_options(ssl_fd->ssl_context, ssl_ctx_options); + + /* + Set the ciphers that can be used + NOTE: SSL_CTX_set_cipher_list will return 0 if + none of the provided ciphers could be selected + */ + if (cipher && + SSL_CTX_set_ciphersuites(ssl_fd->ssl_context, cipher) == 0 && + SSL_CTX_set_cipher_list(ssl_fd->ssl_context, cipher) == 0) + { + *error= SSL_INITERR_CIPHERS; + DBUG_PRINT("error", ("%s", sslGetErrString(*error))); + goto err2; + } + + /* Load certs from the trusted ca */ + if (SSL_CTX_load_verify_locations(ssl_fd->ssl_context, ca_file, ca_path) <= 0) + { + DBUG_PRINT("warning", ("SSL_CTX_load_verify_locations failed")); + if (ca_file || ca_path) + { + /* fail only if ca file or ca path were supplied and looking into + them fails. */ + *error= SSL_INITERR_BAD_PATHS; + DBUG_PRINT("error", ("SSL_CTX_load_verify_locations failed : %s", + sslGetErrString(*error))); + goto err2; + } +#ifndef HAVE_WOLFSSL + /* otherwise go use the defaults */ + if (SSL_CTX_set_default_verify_paths(ssl_fd->ssl_context) == 0) + { + *error= SSL_INITERR_BAD_PATHS; + DBUG_PRINT("error", ("%s", sslGetErrString(*error))); + goto err2; + } +#endif + } + + if (crl_file || crl_path) + { +#ifdef HAVE_WOLFSSL + /* CRL does not work with WolfSSL. */ + DBUG_ASSERT(0); + goto err2; +#else + X509_STORE *store= SSL_CTX_get_cert_store(ssl_fd->ssl_context); + /* Load crls from the trusted ca */ + if (X509_STORE_load_locations(store, crl_file, crl_path) == 0 || + X509_STORE_set_flags(store, + X509_V_FLAG_CRL_CHECK | + X509_V_FLAG_CRL_CHECK_ALL) == 0) + { + DBUG_PRINT("warning", ("X509_STORE_load_locations for CRL failed")); + *error= SSL_INITERR_BAD_PATHS; + DBUG_PRINT("error", ("%s", sslGetErrString(*error))); + goto err2; + } +#endif + } + + if (vio_set_cert_stuff(ssl_fd->ssl_context, cert_file, key_file, + is_client_method, error)) + { + DBUG_PRINT("error", ("vio_set_cert_stuff failed")); + goto err2; + } + +#ifndef HAVE_WOLFSSL + /* DH stuff */ + if (!is_client_method) + { + DH *dh= get_dh2048(); + if (!SSL_CTX_set_tmp_dh(ssl_fd->ssl_context, dh)) + { + *error= SSL_INITERR_DH; + DH_free(dh); + goto err2; + } + + DH_free(dh); + } +#endif + +#ifdef HAVE_WOLFSSL + /* set IO functions used by wolfSSL */ + wolfSSL_SetIORecv(ssl_fd->ssl_context, wolfssl_recv); + wolfSSL_SetIOSend(ssl_fd->ssl_context, wolfssl_send); +#endif + + DBUG_PRINT("exit", ("OK 1")); + + DBUG_RETURN(ssl_fd); + +err2: + SSL_CTX_free(ssl_fd->ssl_context); +err1: + my_free(ssl_fd); +err0: + DBUG_EXECUTE("error", ERR_print_errors_fp(DBUG_FILE);); + DBUG_RETURN(0); +} + + +/************************ VioSSLConnectorFd **********************************/ +struct st_VioSSLFd * +new_VioSSLConnectorFd(const char *key_file, const char *cert_file, + const char *ca_file, const char *ca_path, + const char *cipher, enum enum_ssl_init_error* error, + const char *crl_file, const char *crl_path) +{ + struct st_VioSSLFd *ssl_fd; + int verify= SSL_VERIFY_PEER; + + if (ca_file && ! ca_file[0]) ca_file = NULL; + if (ca_path && ! ca_path[0]) ca_path = NULL; + if (crl_file && ! crl_file[0]) crl_file = NULL; + if (crl_path && ! crl_path[0]) crl_path = NULL; + + /* + If some optional parameters indicate empty strings, then + for compatibility with SSL libraries, replace them with NULL, + otherwise these libraries will try to open files with an empty + name, etc., and they will return an error code instead performing + the necessary operations: + */ + if (ca_file && !ca_file[0]) + { + ca_file = NULL; + } + if (ca_path && !ca_path[0]) + { + ca_path = NULL; + } + if (crl_file && !crl_file[0]) + { + crl_file = NULL; + } + if (crl_path && !crl_path[0]) + { + crl_path = NULL; + } + + /* + Turn off verification of servers certificate if both + ca_file and ca_path is set to NULL + */ + if (ca_file == 0 && ca_path == 0) + verify= SSL_VERIFY_NONE; + + if (!(ssl_fd= new_VioSSLFd(key_file, cert_file, ca_file, + ca_path, cipher, TRUE, error, + crl_file, crl_path, 0))) + { + return 0; + } + + /* Init the VioSSLFd as a "connector" ie. the client side */ + + SSL_CTX_set_verify(ssl_fd->ssl_context, verify, NULL); + + return ssl_fd; +} + + +/************************ VioSSLAcceptorFd **********************************/ +struct st_VioSSLFd * +new_VioSSLAcceptorFd(const char *key_file, const char *cert_file, + const char *ca_file, const char *ca_path, + const char *cipher, enum enum_ssl_init_error* error, + const char *crl_file, const char *crl_path, + ulonglong tls_version) +{ + struct st_VioSSLFd *ssl_fd; + int verify= SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE; + + /* + If some optional parameters indicate empty strings, then + for compatibility with SSL libraries, replace them with NULL, + otherwise these libraries will try to open files with an empty + name, etc., and they will return an error code instead performing + the necessary operations: + */ + if (ca_file && !ca_file[0]) + { + ca_file = NULL; + } + if (ca_path && !ca_path[0]) + { + ca_path = NULL; + } + if (crl_file && !crl_file[0]) + { + crl_file = NULL; + } + if (crl_path && !crl_path[0]) + { + crl_path = NULL; + } + + if (!(ssl_fd= new_VioSSLFd(key_file, cert_file, ca_file, + ca_path, cipher, FALSE, error, + crl_file, crl_path, tls_version))) + { + return 0; + } + /* Init the the VioSSLFd as a "acceptor" ie. the server side */ + + /* Set max number of cached sessions, returns the previous size */ + SSL_CTX_sess_set_cache_size(ssl_fd->ssl_context, 128); + + SSL_CTX_set_verify(ssl_fd->ssl_context, verify, NULL); + + /* + Set session_id - an identifier for this server session + Use the ssl_fd pointer + */ + SSL_CTX_set_session_id_context(ssl_fd->ssl_context, + (const unsigned char *)ssl_fd, + sizeof(ssl_fd)); + + return ssl_fd; +} + +void free_vio_ssl_acceptor_fd(struct st_VioSSLFd *fd) +{ + DBUG_ENTER("free_vio_ssl_acceptor_fd"); + SSL_CTX_free(fd->ssl_context); + my_free(fd); + DBUG_VOID_RETURN; +} +#endif /* HAVE_OPENSSL */ |