diff options
Diffstat (limited to 'thirdparty/openssl/ssl/ssl_lib.c')
| -rw-r--r-- | thirdparty/openssl/ssl/ssl_lib.c | 3571 |
1 files changed, 3571 insertions, 0 deletions
diff --git a/thirdparty/openssl/ssl/ssl_lib.c b/thirdparty/openssl/ssl/ssl_lib.c new file mode 100644 index 0000000000..fd94325bb3 --- /dev/null +++ b/thirdparty/openssl/ssl/ssl_lib.c @@ -0,0 +1,3571 @@ +/* + * ! \file ssl/ssl_lib.c \brief Version independent SSL functions. + */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ +/* ==================================================================== + * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * ECC cipher suite support in OpenSSL originally developed by + * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. + */ +/* ==================================================================== + * Copyright 2005 Nokia. All rights reserved. + * + * The portions of the attached software ("Contribution") is developed by + * Nokia Corporation and is licensed pursuant to the OpenSSL open source + * license. + * + * The Contribution, originally written by Mika Kousa and Pasi Eronen of + * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites + * support (see RFC 4279) to OpenSSL. + * + * No patent licenses or other rights except those expressly stated in + * the OpenSSL open source license shall be deemed granted or received + * expressly, by implication, estoppel, or otherwise. + * + * No assurances are provided by Nokia that the Contribution does not + * infringe the patent or other intellectual property rights of any third + * party or that the license provides you with all the necessary rights + * to make use of the Contribution. + * + * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN + * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA + * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY + * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR + * OTHERWISE. + */ + +#ifdef REF_CHECK +# include <assert.h> +#endif +#include <stdio.h> +#include "ssl_locl.h" +#include "kssl_lcl.h" +#include <openssl/objects.h> +#include <openssl/lhash.h> +#include <openssl/x509v3.h> +#include <openssl/rand.h> +#include <openssl/ocsp.h> +#ifndef OPENSSL_NO_DH +# include <openssl/dh.h> +#endif +#ifndef OPENSSL_NO_ENGINE +# include <openssl/engine.h> +#endif + +const char *SSL_version_str = OPENSSL_VERSION_TEXT; + +SSL3_ENC_METHOD ssl3_undef_enc_method = { + /* + * evil casts, but these functions are only called if there's a library + * bug + */ + (int (*)(SSL *, int))ssl_undefined_function, + (int (*)(SSL *, unsigned char *, int))ssl_undefined_function, + ssl_undefined_function, + (int (*)(SSL *, unsigned char *, unsigned char *, int)) + ssl_undefined_function, + (int (*)(SSL *, int))ssl_undefined_function, + (int (*)(SSL *, const char *, int, unsigned char *)) + ssl_undefined_function, + 0, /* finish_mac_length */ + (int (*)(SSL *, int, unsigned char *))ssl_undefined_function, + NULL, /* client_finished_label */ + 0, /* client_finished_label_len */ + NULL, /* server_finished_label */ + 0, /* server_finished_label_len */ + (int (*)(int))ssl_undefined_function, + (int (*)(SSL *, unsigned char *, size_t, const char *, + size_t, const unsigned char *, size_t, + int use_context))ssl_undefined_function, +}; + +int SSL_clear(SSL *s) +{ + + if (s->method == NULL) { + SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED); + return (0); + } + + if (ssl_clear_bad_session(s)) { + SSL_SESSION_free(s->session); + s->session = NULL; + } + + s->error = 0; + s->hit = 0; + s->shutdown = 0; + +#if 0 + /* + * Disabled since version 1.10 of this file (early return not + * needed because SSL_clear is not called when doing renegotiation) + */ + /* + * This is set if we are doing dynamic renegotiation so keep + * the old cipher. It is sort of a SSL_clear_lite :-) + */ + if (s->renegotiate) + return (1); +#else + if (s->renegotiate) { + SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR); + return 0; + } +#endif + + s->type = 0; + + s->state = SSL_ST_BEFORE | ((s->server) ? SSL_ST_ACCEPT : SSL_ST_CONNECT); + + s->version = s->method->version; + s->client_version = s->version; + s->rwstate = SSL_NOTHING; + s->rstate = SSL_ST_READ_HEADER; +#if 0 + s->read_ahead = s->ctx->read_ahead; +#endif + + if (s->init_buf != NULL) { + BUF_MEM_free(s->init_buf); + s->init_buf = NULL; + } + + ssl_clear_cipher_ctx(s); + ssl_clear_hash_ctx(&s->read_hash); + ssl_clear_hash_ctx(&s->write_hash); + + s->first_packet = 0; +#ifndef OPENSSL_NO_TLSEXT + if (s->cert != NULL) { + if (s->cert->alpn_proposed) { + OPENSSL_free(s->cert->alpn_proposed); + s->cert->alpn_proposed = NULL; + } + s->cert->alpn_proposed_len = 0; + s->cert->alpn_sent = 0; + } +#endif +#if 1 + /* + * Check to see if we were changed into a different method, if so, revert + * back if we are not doing session-id reuse. + */ + if (!s->in_handshake && (s->session == NULL) + && (s->method != s->ctx->method)) { + s->method->ssl_free(s); + s->method = s->ctx->method; + if (!s->method->ssl_new(s)) + return (0); + } else +#endif + s->method->ssl_clear(s); + return (1); +} + +/** Used to change an SSL_CTXs default SSL method type */ +int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth) +{ + STACK_OF(SSL_CIPHER) *sk; + + ctx->method = meth; + + sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list), + &(ctx->cipher_list_by_id), + meth->version == + SSL2_VERSION ? "SSLv2" : + SSL_DEFAULT_CIPHER_LIST, ctx->cert); + if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) { + SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, + SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS); + return (0); + } + return (1); +} + +SSL *SSL_new(SSL_CTX *ctx) +{ + SSL *s; + + if (ctx == NULL) { + SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX); + return (NULL); + } + if (ctx->method == NULL) { + SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); + return (NULL); + } + + s = (SSL *)OPENSSL_malloc(sizeof(SSL)); + if (s == NULL) + goto err; + memset(s, 0, sizeof(SSL)); + +#ifndef OPENSSL_NO_KRB5 + s->kssl_ctx = kssl_ctx_new(); +#endif /* OPENSSL_NO_KRB5 */ + + s->options = ctx->options; + s->mode = ctx->mode; + s->max_cert_list = ctx->max_cert_list; + s->references = 1; + + if (ctx->cert != NULL) { + /* + * Earlier library versions used to copy the pointer to the CERT, not + * its contents; only when setting new parameters for the per-SSL + * copy, ssl_cert_new would be called (and the direct reference to + * the per-SSL_CTX settings would be lost, but those still were + * indirectly accessed for various purposes, and for that reason they + * used to be known as s->ctx->default_cert). Now we don't look at the + * SSL_CTX's CERT after having duplicated it once. + */ + + s->cert = ssl_cert_dup(ctx->cert); + if (s->cert == NULL) + goto err; + } else + s->cert = NULL; /* Cannot really happen (see SSL_CTX_new) */ + + s->read_ahead = ctx->read_ahead; + s->msg_callback = ctx->msg_callback; + s->msg_callback_arg = ctx->msg_callback_arg; + s->verify_mode = ctx->verify_mode; +#if 0 + s->verify_depth = ctx->verify_depth; +#endif + s->sid_ctx_length = ctx->sid_ctx_length; + OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx); + memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); + s->verify_callback = ctx->default_verify_callback; + s->generate_session_id = ctx->generate_session_id; + + s->param = X509_VERIFY_PARAM_new(); + if (!s->param) + goto err; + X509_VERIFY_PARAM_inherit(s->param, ctx->param); +#if 0 + s->purpose = ctx->purpose; + s->trust = ctx->trust; +#endif + s->quiet_shutdown = ctx->quiet_shutdown; + s->max_send_fragment = ctx->max_send_fragment; + + CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); + s->ctx = ctx; +#ifndef OPENSSL_NO_TLSEXT + s->tlsext_debug_cb = 0; + s->tlsext_debug_arg = NULL; + s->tlsext_ticket_expected = 0; + s->tlsext_status_type = -1; + s->tlsext_status_expected = 0; + s->tlsext_ocsp_ids = NULL; + s->tlsext_ocsp_exts = NULL; + s->tlsext_ocsp_resp = NULL; + s->tlsext_ocsp_resplen = -1; + CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); + s->initial_ctx = ctx; +# ifndef OPENSSL_NO_EC + if (ctx->tlsext_ecpointformatlist) { + s->tlsext_ecpointformatlist = + BUF_memdup(ctx->tlsext_ecpointformatlist, + ctx->tlsext_ecpointformatlist_length); + if (!s->tlsext_ecpointformatlist) + goto err; + s->tlsext_ecpointformatlist_length = + ctx->tlsext_ecpointformatlist_length; + } + if (ctx->tlsext_ellipticcurvelist) { + s->tlsext_ellipticcurvelist = + BUF_memdup(ctx->tlsext_ellipticcurvelist, + ctx->tlsext_ellipticcurvelist_length); + if (!s->tlsext_ellipticcurvelist) + goto err; + s->tlsext_ellipticcurvelist_length = + ctx->tlsext_ellipticcurvelist_length; + } +# endif +# ifndef OPENSSL_NO_NEXTPROTONEG + s->next_proto_negotiated = NULL; +# endif + + if (s->ctx->alpn_client_proto_list) { + s->alpn_client_proto_list = + OPENSSL_malloc(s->ctx->alpn_client_proto_list_len); + if (s->alpn_client_proto_list == NULL) + goto err; + memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list, + s->ctx->alpn_client_proto_list_len); + s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len; + } +#endif + + s->verify_result = X509_V_OK; + + s->method = ctx->method; + + if (!s->method->ssl_new(s)) + goto err; + + s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1; + + SSL_clear(s); + + CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); + +#ifndef OPENSSL_NO_PSK + s->psk_client_callback = ctx->psk_client_callback; + s->psk_server_callback = ctx->psk_server_callback; +#endif + + return (s); + err: + if (s != NULL) + SSL_free(s); + SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE); + return (NULL); +} + +int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, + unsigned int sid_ctx_len) +{ + if (sid_ctx_len > sizeof ctx->sid_ctx) { + SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT, + SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); + return 0; + } + ctx->sid_ctx_length = sid_ctx_len; + memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); + + return 1; +} + +int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, + unsigned int sid_ctx_len) +{ + if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { + SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT, + SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); + return 0; + } + ssl->sid_ctx_length = sid_ctx_len; + memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); + + return 1; +} + +int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) +{ + CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); + ctx->generate_session_id = cb; + CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); + return 1; +} + +int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) +{ + CRYPTO_w_lock(CRYPTO_LOCK_SSL); + ssl->generate_session_id = cb; + CRYPTO_w_unlock(CRYPTO_LOCK_SSL); + return 1; +} + +int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id, + unsigned int id_len) +{ + /* + * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how + * we can "construct" a session to give us the desired check - ie. to + * find if there's a session in the hash table that would conflict with + * any new session built out of this id/id_len and the ssl_version in use + * by this SSL. + */ + SSL_SESSION r, *p; + + if (id_len > sizeof r.session_id) + return 0; + + r.ssl_version = ssl->version; + r.session_id_length = id_len; + memcpy(r.session_id, id, id_len); + /* + * NB: SSLv2 always uses a fixed 16-byte session ID, so even if a + * callback is calling us to check the uniqueness of a shorter ID, it + * must be compared as a padded-out ID because that is what it will be + * converted to when the callback has finished choosing it. + */ + if ((r.ssl_version == SSL2_VERSION) && + (id_len < SSL2_SSL_SESSION_ID_LENGTH)) { + memset(r.session_id + id_len, 0, SSL2_SSL_SESSION_ID_LENGTH - id_len); + r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH; + } + + CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); + p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r); + CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); + return (p != NULL); +} + +int SSL_CTX_set_purpose(SSL_CTX *s, int purpose) +{ + return X509_VERIFY_PARAM_set_purpose(s->param, purpose); +} + +int SSL_set_purpose(SSL *s, int purpose) +{ + return X509_VERIFY_PARAM_set_purpose(s->param, purpose); +} + +int SSL_CTX_set_trust(SSL_CTX *s, int trust) +{ + return X509_VERIFY_PARAM_set_trust(s->param, trust); +} + +int SSL_set_trust(SSL *s, int trust) +{ + return X509_VERIFY_PARAM_set_trust(s->param, trust); +} + +int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) +{ + return X509_VERIFY_PARAM_set1(ctx->param, vpm); +} + +int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) +{ + return X509_VERIFY_PARAM_set1(ssl->param, vpm); +} + +X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx) +{ + return ctx->param; +} + +X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl) +{ + return ssl->param; +} + +void SSL_certs_clear(SSL *s) +{ + ssl_cert_clear_certs(s->cert); +} + +void SSL_free(SSL *s) +{ + int i; + + if (s == NULL) + return; + + i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL); +#ifdef REF_PRINT + REF_PRINT("SSL", s); +#endif + if (i > 0) + return; +#ifdef REF_CHECK + if (i < 0) { + fprintf(stderr, "SSL_free, bad reference count\n"); + abort(); /* ok */ + } +#endif + + if (s->param) + X509_VERIFY_PARAM_free(s->param); + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); + + if (s->bbio != NULL) { + /* If the buffering BIO is in place, pop it off */ + if (s->bbio == s->wbio) { + s->wbio = BIO_pop(s->wbio); + } + BIO_free(s->bbio); + s->bbio = NULL; + } + if (s->rbio != NULL) + BIO_free_all(s->rbio); + if ((s->wbio != NULL) && (s->wbio != s->rbio)) + BIO_free_all(s->wbio); + + if (s->init_buf != NULL) + BUF_MEM_free(s->init_buf); + + /* add extra stuff */ + if (s->cipher_list != NULL) + sk_SSL_CIPHER_free(s->cipher_list); + if (s->cipher_list_by_id != NULL) + sk_SSL_CIPHER_free(s->cipher_list_by_id); + + /* Make the next call work :-) */ + if (s->session != NULL) { + ssl_clear_bad_session(s); + SSL_SESSION_free(s->session); + } + + ssl_clear_cipher_ctx(s); + ssl_clear_hash_ctx(&s->read_hash); + ssl_clear_hash_ctx(&s->write_hash); + + if (s->cert != NULL) + ssl_cert_free(s->cert); + /* Free up if allocated */ + +#ifndef OPENSSL_NO_TLSEXT + if (s->tlsext_hostname) + OPENSSL_free(s->tlsext_hostname); + if (s->initial_ctx) + SSL_CTX_free(s->initial_ctx); +# ifndef OPENSSL_NO_EC + if (s->tlsext_ecpointformatlist) + OPENSSL_free(s->tlsext_ecpointformatlist); + if (s->tlsext_ellipticcurvelist) + OPENSSL_free(s->tlsext_ellipticcurvelist); +# endif /* OPENSSL_NO_EC */ + if (s->tlsext_opaque_prf_input) + OPENSSL_free(s->tlsext_opaque_prf_input); + if (s->tlsext_ocsp_exts) + sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts, X509_EXTENSION_free); + if (s->tlsext_ocsp_ids) + sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free); + if (s->tlsext_ocsp_resp) + OPENSSL_free(s->tlsext_ocsp_resp); + if (s->alpn_client_proto_list) + OPENSSL_free(s->alpn_client_proto_list); +#endif + + if (s->client_CA != NULL) + sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free); + + if (s->method != NULL) + s->method->ssl_free(s); + + if (s->ctx) + SSL_CTX_free(s->ctx); + +#ifndef OPENSSL_NO_KRB5 + if (s->kssl_ctx != NULL) + kssl_ctx_free(s->kssl_ctx); +#endif /* OPENSSL_NO_KRB5 */ + +#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + if (s->next_proto_negotiated) + OPENSSL_free(s->next_proto_negotiated); +#endif + +#ifndef OPENSSL_NO_SRTP + if (s->srtp_profiles) + sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles); +#endif + + OPENSSL_free(s); +} + +void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) +{ + /* + * If the output buffering BIO is still in place, remove it + */ + if (s->bbio != NULL) { + if (s->wbio == s->bbio) { + s->wbio = s->wbio->next_bio; + s->bbio->next_bio = NULL; + } + } + if ((s->rbio != NULL) && (s->rbio != rbio)) + BIO_free_all(s->rbio); + if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio)) + BIO_free_all(s->wbio); + s->rbio = rbio; + s->wbio = wbio; +} + +BIO *SSL_get_rbio(const SSL *s) +{ + return (s->rbio); +} + +BIO *SSL_get_wbio(const SSL *s) +{ + return (s->wbio); +} + +int SSL_get_fd(const SSL *s) +{ + return (SSL_get_rfd(s)); +} + +int SSL_get_rfd(const SSL *s) +{ + int ret = -1; + BIO *b, *r; + + b = SSL_get_rbio(s); + r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); + if (r != NULL) + BIO_get_fd(r, &ret); + return (ret); +} + +int SSL_get_wfd(const SSL *s) +{ + int ret = -1; + BIO *b, *r; + + b = SSL_get_wbio(s); + r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); + if (r != NULL) + BIO_get_fd(r, &ret); + return (ret); +} + +#ifndef OPENSSL_NO_SOCK +int SSL_set_fd(SSL *s, int fd) +{ + int ret = 0; + BIO *bio = NULL; + + bio = BIO_new(BIO_s_socket()); + + if (bio == NULL) { + SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB); + goto err; + } + BIO_set_fd(bio, fd, BIO_NOCLOSE); + SSL_set_bio(s, bio, bio); + ret = 1; + err: + return (ret); +} + +int SSL_set_wfd(SSL *s, int fd) +{ + int ret = 0; + BIO *bio = NULL; + + if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET) + || ((int)BIO_get_fd(s->rbio, NULL) != fd)) { + bio = BIO_new(BIO_s_socket()); + + if (bio == NULL) { + SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB); + goto err; + } + BIO_set_fd(bio, fd, BIO_NOCLOSE); + SSL_set_bio(s, SSL_get_rbio(s), bio); + } else + SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); + ret = 1; + err: + return (ret); +} + +int SSL_set_rfd(SSL *s, int fd) +{ + int ret = 0; + BIO *bio = NULL; + + if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET) + || ((int)BIO_get_fd(s->wbio, NULL) != fd)) { + bio = BIO_new(BIO_s_socket()); + + if (bio == NULL) { + SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB); + goto err; + } + BIO_set_fd(bio, fd, BIO_NOCLOSE); + SSL_set_bio(s, bio, SSL_get_wbio(s)); + } else + SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); + ret = 1; + err: + return (ret); +} +#endif + +/* return length of latest Finished message we sent, copy to 'buf' */ +size_t SSL_get_finished(const SSL *s, void *buf, size_t count) +{ + size_t ret = 0; + + if (s->s3 != NULL) { + ret = s->s3->tmp.finish_md_len; + if (count > ret) + count = ret; + memcpy(buf, s->s3->tmp.finish_md, count); + } + return ret; +} + +/* return length of latest Finished message we expected, copy to 'buf' */ +size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count) +{ + size_t ret = 0; + + if (s->s3 != NULL) { + ret = s->s3->tmp.peer_finish_md_len; + if (count > ret) + count = ret; + memcpy(buf, s->s3->tmp.peer_finish_md, count); + } + return ret; +} + +int SSL_get_verify_mode(const SSL *s) +{ + return (s->verify_mode); +} + +int SSL_get_verify_depth(const SSL *s) +{ + return X509_VERIFY_PARAM_get_depth(s->param); +} + +int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) { + return (s->verify_callback); +} + +int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) +{ + return (ctx->verify_mode); +} + +int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) +{ + return X509_VERIFY_PARAM_get_depth(ctx->param); +} + +int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) { + return (ctx->default_verify_callback); +} + +void SSL_set_verify(SSL *s, int mode, + int (*callback) (int ok, X509_STORE_CTX *ctx)) +{ + s->verify_mode = mode; + if (callback != NULL) + s->verify_callback = callback; +} + +void SSL_set_verify_depth(SSL *s, int depth) +{ + X509_VERIFY_PARAM_set_depth(s->param, depth); +} + +void SSL_set_read_ahead(SSL *s, int yes) +{ + s->read_ahead = yes; +} + +int SSL_get_read_ahead(const SSL *s) +{ + return (s->read_ahead); +} + +int SSL_pending(const SSL *s) +{ + /* + * SSL_pending cannot work properly if read-ahead is enabled + * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is + * impossible to fix since SSL_pending cannot report errors that may be + * observed while scanning the new data. (Note that SSL_pending() is + * often used as a boolean value, so we'd better not return -1.) + */ + return (s->method->ssl_pending(s)); +} + +X509 *SSL_get_peer_certificate(const SSL *s) +{ + X509 *r; + + if ((s == NULL) || (s->session == NULL)) + r = NULL; + else + r = s->session->peer; + + if (r == NULL) + return (r); + + CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509); + + return (r); +} + +STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s) +{ + STACK_OF(X509) *r; + + if ((s == NULL) || (s->session == NULL) + || (s->session->sess_cert == NULL)) + r = NULL; + else + r = s->session->sess_cert->cert_chain; + + /* + * If we are a client, cert_chain includes the peer's own certificate; if + * we are a server, it does not. + */ + + return (r); +} + +/* + * Now in theory, since the calling process own 't' it should be safe to + * modify. We need to be able to read f without being hassled + */ +void SSL_copy_session_id(SSL *t, const SSL *f) +{ + CERT *tmp; + + /* Do we need to to SSL locking? */ + SSL_set_session(t, SSL_get_session(f)); + + /* + * what if we are setup as SSLv2 but want to talk SSLv3 or vice-versa + */ + if (t->method != f->method) { + t->method->ssl_free(t); /* cleanup current */ + t->method = f->method; /* change method */ + t->method->ssl_new(t); /* setup new */ + } + + tmp = t->cert; + if (f->cert != NULL) { + CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT); + t->cert = f->cert; + } else + t->cert = NULL; + if (tmp != NULL) + ssl_cert_free(tmp); + SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length); +} + +/* Fix this so it checks all the valid key/cert options */ +int SSL_CTX_check_private_key(const SSL_CTX *ctx) +{ + if ((ctx == NULL) || + (ctx->cert == NULL) || (ctx->cert->key->x509 == NULL)) { + SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, + SSL_R_NO_CERTIFICATE_ASSIGNED); + return (0); + } + if (ctx->cert->key->privatekey == NULL) { + SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, + SSL_R_NO_PRIVATE_KEY_ASSIGNED); + return (0); + } + return (X509_check_private_key + (ctx->cert->key->x509, ctx->cert->key->privatekey)); +} + +/* Fix this function so that it takes an optional type parameter */ +int SSL_check_private_key(const SSL *ssl) +{ + if (ssl == NULL) { + SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + if (ssl->cert == NULL) { + SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); + return 0; + } + if (ssl->cert->key->x509 == NULL) { + SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED); + return (0); + } + if (ssl->cert->key->privatekey == NULL) { + SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED); + return (0); + } + return (X509_check_private_key(ssl->cert->key->x509, + ssl->cert->key->privatekey)); +} + +int SSL_accept(SSL *s) +{ + if (s->handshake_func == 0) + /* Not properly initialized yet */ + SSL_set_accept_state(s); + + return (s->method->ssl_accept(s)); +} + +int SSL_connect(SSL *s) +{ + if (s->handshake_func == 0) + /* Not properly initialized yet */ + SSL_set_connect_state(s); + + return (s->method->ssl_connect(s)); +} + +long SSL_get_default_timeout(const SSL *s) +{ + return (s->method->get_timeout()); +} + +int SSL_read(SSL *s, void *buf, int num) +{ + if (s->handshake_func == 0) { + SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED); + return -1; + } + + if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { + s->rwstate = SSL_NOTHING; + return (0); + } + return (s->method->ssl_read(s, buf, num)); +} + +int SSL_peek(SSL *s, void *buf, int num) +{ + if (s->handshake_func == 0) { + SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED); + return -1; + } + + if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { + return (0); + } + return (s->method->ssl_peek(s, buf, num)); +} + +int SSL_write(SSL *s, const void *buf, int num) +{ + if (s->handshake_func == 0) { + SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED); + return -1; + } + + if (s->shutdown & SSL_SENT_SHUTDOWN) { + s->rwstate = SSL_NOTHING; + SSLerr(SSL_F_SSL_WRITE, SSL_R_PROTOCOL_IS_SHUTDOWN); + return (-1); + } + return (s->method->ssl_write(s, buf, num)); +} + +int SSL_shutdown(SSL *s) +{ + /* + * Note that this function behaves differently from what one might + * expect. Return values are 0 for no success (yet), 1 for success; but + * calling it once is usually not enough, even if blocking I/O is used + * (see ssl3_shutdown). + */ + + if (s->handshake_func == 0) { + SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED); + return -1; + } + + if (!SSL_in_init(s)) { + return s->method->ssl_shutdown(s); + } else { + SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT); + return -1; + } +} + +int SSL_renegotiate(SSL *s) +{ + if (s->renegotiate == 0) + s->renegotiate = 1; + + s->new_session = 1; + + return (s->method->ssl_renegotiate(s)); +} + +int SSL_renegotiate_abbreviated(SSL *s) +{ + if (s->renegotiate == 0) + s->renegotiate = 1; + + s->new_session = 0; + + return (s->method->ssl_renegotiate(s)); +} + +int SSL_renegotiate_pending(SSL *s) +{ + /* + * becomes true when negotiation is requested; false again once a + * handshake has finished + */ + return (s->renegotiate != 0); +} + +long SSL_ctrl(SSL *s, int cmd, long larg, void *parg) +{ + long l; + + switch (cmd) { + case SSL_CTRL_GET_READ_AHEAD: + return (s->read_ahead); + case SSL_CTRL_SET_READ_AHEAD: + l = s->read_ahead; + s->read_ahead = larg; + return (l); + + case SSL_CTRL_SET_MSG_CALLBACK_ARG: + s->msg_callback_arg = parg; + return 1; + + case SSL_CTRL_OPTIONS: + return (s->options |= larg); + case SSL_CTRL_CLEAR_OPTIONS: + return (s->options &= ~larg); + case SSL_CTRL_MODE: + return (s->mode |= larg); + case SSL_CTRL_CLEAR_MODE: + return (s->mode &= ~larg); + case SSL_CTRL_GET_MAX_CERT_LIST: + return (s->max_cert_list); + case SSL_CTRL_SET_MAX_CERT_LIST: + l = s->max_cert_list; + s->max_cert_list = larg; + return (l); + case SSL_CTRL_SET_MAX_SEND_FRAGMENT: + if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) + return 0; + s->max_send_fragment = larg; + return 1; + case SSL_CTRL_GET_RI_SUPPORT: + if (s->s3) + return s->s3->send_connection_binding; + else + return 0; + case SSL_CTRL_CERT_FLAGS: + return (s->cert->cert_flags |= larg); + case SSL_CTRL_CLEAR_CERT_FLAGS: + return (s->cert->cert_flags &= ~larg); + + case SSL_CTRL_GET_RAW_CIPHERLIST: + if (parg) { + if (s->cert->ciphers_raw == NULL) + return 0; + *(unsigned char **)parg = s->cert->ciphers_raw; + return (int)s->cert->ciphers_rawlen; + } else + return ssl_put_cipher_by_char(s, NULL, NULL); + default: + return (s->method->ssl_ctrl(s, cmd, larg, parg)); + } +} + +long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void)) +{ + switch (cmd) { + case SSL_CTRL_SET_MSG_CALLBACK: + s->msg_callback = (void (*) + (int write_p, int version, int content_type, + const void *buf, size_t len, SSL *ssl, + void *arg))(fp); + return 1; + + default: + return (s->method->ssl_callback_ctrl(s, cmd, fp)); + } +} + +LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx) +{ + return ctx->sessions; +} + +long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) +{ + long l; + /* For some cases with ctx == NULL perform syntax checks */ + if (ctx == NULL) { + switch (cmd) { +#ifndef OPENSSL_NO_EC + case SSL_CTRL_SET_CURVES_LIST: + return tls1_set_curves_list(NULL, NULL, parg); +#endif + case SSL_CTRL_SET_SIGALGS_LIST: + case SSL_CTRL_SET_CLIENT_SIGALGS_LIST: + return tls1_set_sigalgs_list(NULL, parg, 0); + default: + return 0; + } + } + + switch (cmd) { + case SSL_CTRL_GET_READ_AHEAD: + return (ctx->read_ahead); + case SSL_CTRL_SET_READ_AHEAD: + l = ctx->read_ahead; + ctx->read_ahead = larg; + return (l); + + case SSL_CTRL_SET_MSG_CALLBACK_ARG: + ctx->msg_callback_arg = parg; + return 1; + + case SSL_CTRL_GET_MAX_CERT_LIST: + return (ctx->max_cert_list); + case SSL_CTRL_SET_MAX_CERT_LIST: + l = ctx->max_cert_list; + ctx->max_cert_list = larg; + return (l); + + case SSL_CTRL_SET_SESS_CACHE_SIZE: + l = ctx->session_cache_size; + ctx->session_cache_size = larg; + return (l); + case SSL_CTRL_GET_SESS_CACHE_SIZE: + return (ctx->session_cache_size); + case SSL_CTRL_SET_SESS_CACHE_MODE: + l = ctx->session_cache_mode; + ctx->session_cache_mode = larg; + return (l); + case SSL_CTRL_GET_SESS_CACHE_MODE: + return (ctx->session_cache_mode); + + case SSL_CTRL_SESS_NUMBER: + return (lh_SSL_SESSION_num_items(ctx->sessions)); + case SSL_CTRL_SESS_CONNECT: + return (ctx->stats.sess_connect); + case SSL_CTRL_SESS_CONNECT_GOOD: + return (ctx->stats.sess_connect_good); + case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: + return (ctx->stats.sess_connect_renegotiate); + case SSL_CTRL_SESS_ACCEPT: + return (ctx->stats.sess_accept); + case SSL_CTRL_SESS_ACCEPT_GOOD: + return (ctx->stats.sess_accept_good); + case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: + return (ctx->stats.sess_accept_renegotiate); + case SSL_CTRL_SESS_HIT: + return (ctx->stats.sess_hit); + case SSL_CTRL_SESS_CB_HIT: + return (ctx->stats.sess_cb_hit); + case SSL_CTRL_SESS_MISSES: + return (ctx->stats.sess_miss); + case SSL_CTRL_SESS_TIMEOUTS: + return (ctx->stats.sess_timeout); + case SSL_CTRL_SESS_CACHE_FULL: + return (ctx->stats.sess_cache_full); + case SSL_CTRL_OPTIONS: + return (ctx->options |= larg); + case SSL_CTRL_CLEAR_OPTIONS: + return (ctx->options &= ~larg); + case SSL_CTRL_MODE: + return (ctx->mode |= larg); + case SSL_CTRL_CLEAR_MODE: + return (ctx->mode &= ~larg); + case SSL_CTRL_SET_MAX_SEND_FRAGMENT: + if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) + return 0; + ctx->max_send_fragment = larg; + return 1; + case SSL_CTRL_CERT_FLAGS: + return (ctx->cert->cert_flags |= larg); + case SSL_CTRL_CLEAR_CERT_FLAGS: + return (ctx->cert->cert_flags &= ~larg); + default: + return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg)); + } +} + +long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void)) +{ + switch (cmd) { + case SSL_CTRL_SET_MSG_CALLBACK: + ctx->msg_callback = (void (*) + (int write_p, int version, int content_type, + const void *buf, size_t len, SSL *ssl, + void *arg))(fp); + return 1; + + default: + return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp)); + } +} + +int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b) +{ + long l; + + l = a->id - b->id; + if (l == 0L) + return (0); + else + return ((l > 0) ? 1 : -1); +} + +int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap, + const SSL_CIPHER *const *bp) +{ + long l; + + l = (*ap)->id - (*bp)->id; + if (l == 0L) + return (0); + else + return ((l > 0) ? 1 : -1); +} + +/** return a STACK of the ciphers available for the SSL and in order of + * preference */ +STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s) +{ + if (s != NULL) { + if (s->cipher_list != NULL) { + return (s->cipher_list); + } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) { + return (s->ctx->cipher_list); + } + } + return (NULL); +} + +/** return a STACK of the ciphers available for the SSL and in order of + * algorithm id */ +STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s) +{ + if (s != NULL) { + if (s->cipher_list_by_id != NULL) { + return (s->cipher_list_by_id); + } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) { + return (s->ctx->cipher_list_by_id); + } + } + return (NULL); +} + +/** The old interface to get the same thing as SSL_get_ciphers() */ +const char *SSL_get_cipher_list(const SSL *s, int n) +{ + SSL_CIPHER *c; + STACK_OF(SSL_CIPHER) *sk; + + if (s == NULL) + return (NULL); + sk = SSL_get_ciphers(s); + if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n)) + return (NULL); + c = sk_SSL_CIPHER_value(sk, n); + if (c == NULL) + return (NULL); + return (c->name); +} + +/** specify the ciphers to be used by default by the SSL_CTX */ +int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) +{ + STACK_OF(SSL_CIPHER) *sk; + + sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, + &ctx->cipher_list_by_id, str, ctx->cert); + /* + * ssl_create_cipher_list may return an empty stack if it was unable to + * find a cipher matching the given rule string (for example if the rule + * string specifies a cipher which has been disabled). This is not an + * error as far as ssl_create_cipher_list is concerned, and hence + * ctx->cipher_list and ctx->cipher_list_by_id has been updated. + */ + if (sk == NULL) + return 0; + else if (sk_SSL_CIPHER_num(sk) == 0) { + SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); + return 0; + } + return 1; +} + +/** specify the ciphers to be used by the SSL */ +int SSL_set_cipher_list(SSL *s, const char *str) +{ + STACK_OF(SSL_CIPHER) *sk; + + sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, + &s->cipher_list_by_id, str, s->cert); + /* see comment in SSL_CTX_set_cipher_list */ + if (sk == NULL) + return 0; + else if (sk_SSL_CIPHER_num(sk) == 0) { + SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH); + return 0; + } + return 1; +} + +/* works well for SSLv2, not so good for SSLv3 */ +char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len) +{ + char *p; + STACK_OF(SSL_CIPHER) *sk; + SSL_CIPHER *c; + int i; + + if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2)) + return (NULL); + + p = buf; + sk = s->session->ciphers; + + if (sk_SSL_CIPHER_num(sk) == 0) + return NULL; + + for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { + int n; + + c = sk_SSL_CIPHER_value(sk, i); + n = strlen(c->name); + if (n + 1 > len) { + if (p != buf) + --p; + *p = '\0'; + return buf; + } + strcpy(p, c->name); + p += n; + *(p++) = ':'; + len -= n + 1; + } + p[-1] = '\0'; + return (buf); +} + +int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, + unsigned char *p, + int (*put_cb) (const SSL_CIPHER *, + unsigned char *)) +{ + int i, j = 0; + SSL_CIPHER *c; + CERT *ct = s->cert; + unsigned char *q; + int empty_reneg_info_scsv = !s->renegotiate; + /* Set disabled masks for this session */ + ssl_set_client_disabled(s); + + if (sk == NULL) + return (0); + q = p; + if (put_cb == NULL) + put_cb = s->method->put_cipher_by_char; + + for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { + c = sk_SSL_CIPHER_value(sk, i); + /* Skip disabled ciphers */ + if (c->algorithm_ssl & ct->mask_ssl || + c->algorithm_mkey & ct->mask_k || c->algorithm_auth & ct->mask_a) + continue; +#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL + if (c->id == SSL3_CK_SCSV) { + if (!empty_reneg_info_scsv) + continue; + else + empty_reneg_info_scsv = 0; + } +#endif + j = put_cb(c, p); + p += j; + } + /* + * If p == q, no ciphers; caller indicates an error. Otherwise, add + * applicable SCSVs. + */ + if (p != q) { + if (empty_reneg_info_scsv) { + static SSL_CIPHER scsv = { + 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 + }; + j = put_cb(&scsv, p); + p += j; +#ifdef OPENSSL_RI_DEBUG + fprintf(stderr, + "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n"); +#endif + } + if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { + static SSL_CIPHER scsv = { + 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 + }; + j = put_cb(&scsv, p); + p += j; + } + } + + return (p - q); +} + +STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s, unsigned char *p, + int num, + STACK_OF(SSL_CIPHER) **skp) +{ + const SSL_CIPHER *c; + STACK_OF(SSL_CIPHER) *sk; + int i, n; + + if (s->s3) + s->s3->send_connection_binding = 0; + + n = ssl_put_cipher_by_char(s, NULL, NULL); + if (n == 0 || (num % n) != 0) { + SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, + SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); + return (NULL); + } + if ((skp == NULL) || (*skp == NULL)) { + sk = sk_SSL_CIPHER_new_null(); /* change perhaps later */ + if(sk == NULL) { + SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); + return NULL; + } + } else { + sk = *skp; + sk_SSL_CIPHER_zero(sk); + } + + if (s->cert->ciphers_raw) + OPENSSL_free(s->cert->ciphers_raw); + s->cert->ciphers_raw = BUF_memdup(p, num); + if (s->cert->ciphers_raw == NULL) { + SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); + goto err; + } + s->cert->ciphers_rawlen = (size_t)num; + + for (i = 0; i < num; i += n) { + /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */ + if (s->s3 && (n != 3 || !p[0]) && + (p[n - 2] == ((SSL3_CK_SCSV >> 8) & 0xff)) && + (p[n - 1] == (SSL3_CK_SCSV & 0xff))) { + /* SCSV fatal if renegotiating */ + if (s->renegotiate) { + SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, + SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); + goto err; + } + s->s3->send_connection_binding = 1; + p += n; +#ifdef OPENSSL_RI_DEBUG + fprintf(stderr, "SCSV received by server\n"); +#endif + continue; + } + + /* Check for TLS_FALLBACK_SCSV */ + if ((n != 3 || !p[0]) && + (p[n - 2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) && + (p[n - 1] == (SSL3_CK_FALLBACK_SCSV & 0xff))) { + /* + * The SCSV indicates that the client previously tried a higher + * version. Fail if the current version is an unexpected + * downgrade. + */ + if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL)) { + SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, + SSL_R_INAPPROPRIATE_FALLBACK); + if (s->s3) + ssl3_send_alert(s, SSL3_AL_FATAL, + SSL_AD_INAPPROPRIATE_FALLBACK); + goto err; + } + p += n; + continue; + } + + c = ssl_get_cipher_by_char(s, p); + p += n; + if (c != NULL) { + if (!sk_SSL_CIPHER_push(sk, c)) { + SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE); + goto err; + } + } + } + + if (skp != NULL) + *skp = sk; + return (sk); + err: + if ((skp == NULL) || (*skp == NULL)) + sk_SSL_CIPHER_free(sk); + return (NULL); +} + +#ifndef OPENSSL_NO_TLSEXT +/** return a servername extension value if provided in Client Hello, or NULL. + * So far, only host_name types are defined (RFC 3546). + */ + +const char *SSL_get_servername(const SSL *s, const int type) +{ + if (type != TLSEXT_NAMETYPE_host_name) + return NULL; + + return s->session && !s->tlsext_hostname ? + s->session->tlsext_hostname : s->tlsext_hostname; +} + +int SSL_get_servername_type(const SSL *s) +{ + if (s->session + && (!s->tlsext_hostname ? s->session-> + tlsext_hostname : s->tlsext_hostname)) + return TLSEXT_NAMETYPE_host_name; + return -1; +} + +/* + * SSL_select_next_proto implements the standard protocol selection. It is + * expected that this function is called from the callback set by + * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a + * vector of 8-bit, length prefixed byte strings. The length byte itself is + * not included in the length. A byte string of length 0 is invalid. No byte + * string may be truncated. The current, but experimental algorithm for + * selecting the protocol is: 1) If the server doesn't support NPN then this + * is indicated to the callback. In this case, the client application has to + * abort the connection or have a default application level protocol. 2) If + * the server supports NPN, but advertises an empty list then the client + * selects the first protcol in its list, but indicates via the API that this + * fallback case was enacted. 3) Otherwise, the client finds the first + * protocol in the server's list that it supports and selects this protocol. + * This is because it's assumed that the server has better information about + * which protocol a client should use. 4) If the client doesn't support any + * of the server's advertised protocols, then this is treated the same as + * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was + * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. + */ +int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, + const unsigned char *server, + unsigned int server_len, + const unsigned char *client, + unsigned int client_len) +{ + unsigned int i, j; + const unsigned char *result; + int status = OPENSSL_NPN_UNSUPPORTED; + + /* + * For each protocol in server preference order, see if we support it. + */ + for (i = 0; i < server_len;) { + for (j = 0; j < client_len;) { + if (server[i] == client[j] && + memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) { + /* We found a match */ + result = &server[i]; + status = OPENSSL_NPN_NEGOTIATED; + goto found; + } + j += client[j]; + j++; + } + i += server[i]; + i++; + } + + /* There's no overlap between our protocols and the server's list. */ + result = client; + status = OPENSSL_NPN_NO_OVERLAP; + + found: + *out = (unsigned char *)result + 1; + *outlen = result[0]; + return status; +} + +# ifndef OPENSSL_NO_NEXTPROTONEG +/* + * SSL_get0_next_proto_negotiated sets *data and *len to point to the + * client's requested protocol for this connection and returns 0. If the + * client didn't request any protocol, then *data is set to NULL. Note that + * the client can request any protocol it chooses. The value returned from + * this function need not be a member of the list of supported protocols + * provided by the callback. + */ +void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, + unsigned *len) +{ + *data = s->next_proto_negotiated; + if (!*data) { + *len = 0; + } else { + *len = s->next_proto_negotiated_len; + } +} + +/* + * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when + * a TLS server needs a list of supported protocols for Next Protocol + * Negotiation. The returned list must be in wire format. The list is + * returned by setting |out| to point to it and |outlen| to its length. This + * memory will not be modified, but one should assume that the SSL* keeps a + * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it + * wishes to advertise. Otherwise, no such extension will be included in the + * ServerHello. + */ +void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, + int (*cb) (SSL *ssl, + const unsigned char + **out, + unsigned int *outlen, + void *arg), void *arg) +{ + ctx->next_protos_advertised_cb = cb; + ctx->next_protos_advertised_cb_arg = arg; +} + +/* + * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a + * client needs to select a protocol from the server's provided list. |out| + * must be set to point to the selected protocol (which may be within |in|). + * The length of the protocol name must be written into |outlen|. The + * server's advertised protocols are provided in |in| and |inlen|. The + * callback can assume that |in| is syntactically valid. The client must + * select a protocol. It is fatal to the connection if this callback returns + * a value other than SSL_TLSEXT_ERR_OK. + */ +void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, + int (*cb) (SSL *s, unsigned char **out, + unsigned char *outlen, + const unsigned char *in, + unsigned int inlen, + void *arg), void *arg) +{ + ctx->next_proto_select_cb = cb; + ctx->next_proto_select_cb_arg = arg; +} +# endif + +/* + * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|. + * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit + * length-prefixed strings). Returns 0 on success. + */ +int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos, + unsigned protos_len) +{ + if (ctx->alpn_client_proto_list) + OPENSSL_free(ctx->alpn_client_proto_list); + + ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len); + if (!ctx->alpn_client_proto_list) + return 1; + memcpy(ctx->alpn_client_proto_list, protos, protos_len); + ctx->alpn_client_proto_list_len = protos_len; + + return 0; +} + +/* + * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|. + * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit + * length-prefixed strings). Returns 0 on success. + */ +int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos, + unsigned protos_len) +{ + if (ssl->alpn_client_proto_list) + OPENSSL_free(ssl->alpn_client_proto_list); + + ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len); + if (!ssl->alpn_client_proto_list) + return 1; + memcpy(ssl->alpn_client_proto_list, protos, protos_len); + ssl->alpn_client_proto_list_len = protos_len; + + return 0; +} + +/* + * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is + * called during ClientHello processing in order to select an ALPN protocol + * from the client's list of offered protocols. + */ +void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx, + int (*cb) (SSL *ssl, + const unsigned char **out, + unsigned char *outlen, + const unsigned char *in, + unsigned int inlen, + void *arg), void *arg) +{ + ctx->alpn_select_cb = cb; + ctx->alpn_select_cb_arg = arg; +} + +/* + * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from + * |ssl|. On return it sets |*data| to point to |*len| bytes of protocol name + * (not including the leading length-prefix byte). If the server didn't + * respond with a negotiated protocol then |*len| will be zero. + */ +void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data, + unsigned *len) +{ + *data = NULL; + if (ssl->s3) + *data = ssl->s3->alpn_selected; + if (*data == NULL) + *len = 0; + else + *len = ssl->s3->alpn_selected_len; +} + +#endif /* !OPENSSL_NO_TLSEXT */ + +int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen, + const char *label, size_t llen, + const unsigned char *p, size_t plen, + int use_context) +{ + if (s->version < TLS1_VERSION) + return -1; + + return s->method->ssl3_enc->export_keying_material(s, out, olen, label, + llen, p, plen, + use_context); +} + +static unsigned long ssl_session_hash(const SSL_SESSION *a) +{ + unsigned long l; + + l = (unsigned long) + ((unsigned int)a->session_id[0]) | + ((unsigned int)a->session_id[1] << 8L) | + ((unsigned long)a->session_id[2] << 16L) | + ((unsigned long)a->session_id[3] << 24L); + return (l); +} + +/* + * NB: If this function (or indeed the hash function which uses a sort of + * coarser function than this one) is changed, ensure + * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on + * being able to construct an SSL_SESSION that will collide with any existing + * session with a matching session ID. + */ +static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) +{ + if (a->ssl_version != b->ssl_version) + return (1); + if (a->session_id_length != b->session_id_length) + return (1); + return (memcmp(a->session_id, b->session_id, a->session_id_length)); +} + +/* + * These wrapper functions should remain rather than redeclaring + * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each + * variable. The reason is that the functions aren't static, they're exposed + * via ssl.h. + */ +static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION) +static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION) + +SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth) +{ + SSL_CTX *ret = NULL; + + if (meth == NULL) { + SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED); + return (NULL); + } +#ifdef OPENSSL_FIPS + if (FIPS_mode() && (meth->version < TLS1_VERSION)) { + SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); + return NULL; + } +#endif + + if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { + SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); + goto err; + } + ret = (SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX)); + if (ret == NULL) + goto err; + + memset(ret, 0, sizeof(SSL_CTX)); + + ret->method = meth; + + ret->cert_store = NULL; + ret->session_cache_mode = SSL_SESS_CACHE_SERVER; + ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; + ret->session_cache_head = NULL; + ret->session_cache_tail = NULL; + + /* We take the system default */ + ret->session_timeout = meth->get_timeout(); + + ret->new_session_cb = 0; + ret->remove_session_cb = 0; + ret->get_session_cb = 0; + ret->generate_session_id = 0; + + memset((char *)&ret->stats, 0, sizeof(ret->stats)); + + ret->references = 1; + ret->quiet_shutdown = 0; + +/* ret->cipher=NULL;*/ +/*- + ret->s2->challenge=NULL; + ret->master_key=NULL; + ret->key_arg=NULL; + ret->s2->conn_id=NULL; */ + + ret->info_callback = NULL; + + ret->app_verify_callback = 0; + ret->app_verify_arg = NULL; + + ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; + ret->read_ahead = 0; + ret->msg_callback = 0; + ret->msg_callback_arg = NULL; + ret->verify_mode = SSL_VERIFY_NONE; +#if 0 + ret->verify_depth = -1; /* Don't impose a limit (but x509_lu.c does) */ +#endif + ret->sid_ctx_length = 0; + ret->default_verify_callback = NULL; + if ((ret->cert = ssl_cert_new()) == NULL) + goto err; + + ret->default_passwd_callback = 0; + ret->default_passwd_callback_userdata = NULL; + ret->client_cert_cb = 0; + ret->app_gen_cookie_cb = 0; + ret->app_verify_cookie_cb = 0; + + ret->sessions = lh_SSL_SESSION_new(); + if (ret->sessions == NULL) + goto err; + ret->cert_store = X509_STORE_new(); + if (ret->cert_store == NULL) + goto err; + + ssl_create_cipher_list(ret->method, + &ret->cipher_list, &ret->cipher_list_by_id, + meth->version == + SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, + ret->cert); + if (ret->cipher_list == NULL || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) { + SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS); + goto err2; + } + + ret->param = X509_VERIFY_PARAM_new(); + if (!ret->param) + goto err; + + if ((ret->rsa_md5 = EVP_get_digestbyname("ssl2-md5")) == NULL) { + SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES); + goto err2; + } + if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) { + SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES); + goto err2; + } + if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) { + SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES); + goto err2; + } + + if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL) + goto err; + + CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data); + + ret->extra_certs = NULL; + /* No compression for DTLS */ + if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)) + ret->comp_methods = SSL_COMP_get_compression_methods(); + + ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; + +#ifndef OPENSSL_NO_TLSEXT + ret->tlsext_servername_callback = 0; + ret->tlsext_servername_arg = NULL; + /* Setup RFC4507 ticket keys */ + if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0) + || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0) + || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0)) + ret->options |= SSL_OP_NO_TICKET; + + ret->tlsext_status_cb = 0; + ret->tlsext_status_arg = NULL; + +# ifndef OPENSSL_NO_NEXTPROTONEG + ret->next_protos_advertised_cb = 0; + ret->next_proto_select_cb = 0; +# endif +#endif +#ifndef OPENSSL_NO_PSK + ret->psk_identity_hint = NULL; + ret->psk_client_callback = NULL; + ret->psk_server_callback = NULL; +#endif +#ifndef OPENSSL_NO_SRP + SSL_CTX_SRP_CTX_init(ret); +#endif +#ifndef OPENSSL_NO_BUF_FREELISTS + ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT; + ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST)); + if (!ret->rbuf_freelist) + goto err; + ret->rbuf_freelist->chunklen = 0; + ret->rbuf_freelist->len = 0; + ret->rbuf_freelist->head = NULL; + ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST)); + if (!ret->wbuf_freelist) { + OPENSSL_free(ret->rbuf_freelist); + goto err; + } + ret->wbuf_freelist->chunklen = 0; + ret->wbuf_freelist->len = 0; + ret->wbuf_freelist->head = NULL; +#endif +#ifndef OPENSSL_NO_ENGINE + ret->client_cert_engine = NULL; +# ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO +# define eng_strx(x) #x +# define eng_str(x) eng_strx(x) + /* Use specific client engine automatically... ignore errors */ + { + ENGINE *eng; + eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); + if (!eng) { + ERR_clear_error(); + ENGINE_load_builtin_engines(); + eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO)); + } + if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng)) + ERR_clear_error(); + } +# endif +#endif + /* + * Default is to connect to non-RI servers. When RI is more widely + * deployed might change this. + */ + ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; + + /* + * Disable SSLv2 by default, callers that want to enable SSLv2 will have to + * explicitly clear this option via either of SSL_CTX_clear_options() or + * SSL_clear_options(). + */ + ret->options |= SSL_OP_NO_SSLv2; + + return (ret); + err: + SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE); + err2: + if (ret != NULL) + SSL_CTX_free(ret); + return (NULL); +} + +#if 0 +static void SSL_COMP_free(SSL_COMP *comp) +{ + OPENSSL_free(comp); +} +#endif + +#ifndef OPENSSL_NO_BUF_FREELISTS +static void ssl_buf_freelist_free(SSL3_BUF_FREELIST *list) +{ + SSL3_BUF_FREELIST_ENTRY *ent, *next; + for (ent = list->head; ent; ent = next) { + next = ent->next; + OPENSSL_free(ent); + } + OPENSSL_free(list); +} +#endif + +void SSL_CTX_free(SSL_CTX *a) +{ + int i; + + if (a == NULL) + return; + + i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX); +#ifdef REF_PRINT + REF_PRINT("SSL_CTX", a); +#endif + if (i > 0) + return; +#ifdef REF_CHECK + if (i < 0) { + fprintf(stderr, "SSL_CTX_free, bad reference count\n"); + abort(); /* ok */ + } +#endif + + if (a->param) + X509_VERIFY_PARAM_free(a->param); + + /* + * Free internal session cache. However: the remove_cb() may reference + * the ex_data of SSL_CTX, thus the ex_data store can only be removed + * after the sessions were flushed. + * As the ex_data handling routines might also touch the session cache, + * the most secure solution seems to be: empty (flush) the cache, then + * free ex_data, then finally free the cache. + * (See ticket [openssl.org #212].) + */ + if (a->sessions != NULL) + SSL_CTX_flush_sessions(a, 0); + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); + + if (a->sessions != NULL) + lh_SSL_SESSION_free(a->sessions); + + if (a->cert_store != NULL) + X509_STORE_free(a->cert_store); + if (a->cipher_list != NULL) + sk_SSL_CIPHER_free(a->cipher_list); + if (a->cipher_list_by_id != NULL) + sk_SSL_CIPHER_free(a->cipher_list_by_id); + if (a->cert != NULL) + ssl_cert_free(a->cert); + if (a->client_CA != NULL) + sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free); + if (a->extra_certs != NULL) + sk_X509_pop_free(a->extra_certs, X509_free); +#if 0 /* This should never be done, since it + * removes a global database */ + if (a->comp_methods != NULL) + sk_SSL_COMP_pop_free(a->comp_methods, SSL_COMP_free); +#else + a->comp_methods = NULL; +#endif + +#ifndef OPENSSL_NO_SRTP + if (a->srtp_profiles) + sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); +#endif + +#ifndef OPENSSL_NO_PSK + if (a->psk_identity_hint) + OPENSSL_free(a->psk_identity_hint); +#endif +#ifndef OPENSSL_NO_SRP + SSL_CTX_SRP_CTX_free(a); +#endif +#ifndef OPENSSL_NO_ENGINE + if (a->client_cert_engine) + ENGINE_finish(a->client_cert_engine); +#endif + +#ifndef OPENSSL_NO_BUF_FREELISTS + if (a->wbuf_freelist) + ssl_buf_freelist_free(a->wbuf_freelist); + if (a->rbuf_freelist) + ssl_buf_freelist_free(a->rbuf_freelist); +#endif +#ifndef OPENSSL_NO_TLSEXT +# ifndef OPENSSL_NO_EC + if (a->tlsext_ecpointformatlist) + OPENSSL_free(a->tlsext_ecpointformatlist); + if (a->tlsext_ellipticcurvelist) + OPENSSL_free(a->tlsext_ellipticcurvelist); +# endif /* OPENSSL_NO_EC */ + if (a->alpn_client_proto_list != NULL) + OPENSSL_free(a->alpn_client_proto_list); +#endif + + OPENSSL_free(a); +} + +void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) +{ + ctx->default_passwd_callback = cb; +} + +void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) +{ + ctx->default_passwd_callback_userdata = u; +} + +void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, + int (*cb) (X509_STORE_CTX *, void *), + void *arg) +{ + ctx->app_verify_callback = cb; + ctx->app_verify_arg = arg; +} + +void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, + int (*cb) (int, X509_STORE_CTX *)) +{ + ctx->verify_mode = mode; + ctx->default_verify_callback = cb; +} + +void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) +{ + X509_VERIFY_PARAM_set_depth(ctx->param, depth); +} + +void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), + void *arg) +{ + ssl_cert_set_cert_cb(c->cert, cb, arg); +} + +void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg) +{ + ssl_cert_set_cert_cb(s->cert, cb, arg); +} + +void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher) +{ + CERT_PKEY *cpk; + int rsa_enc, rsa_tmp, rsa_sign, dh_tmp, dh_rsa, dh_dsa, dsa_sign; + int rsa_enc_export, dh_rsa_export, dh_dsa_export; + int rsa_tmp_export, dh_tmp_export, kl; + unsigned long mask_k, mask_a, emask_k, emask_a; +#ifndef OPENSSL_NO_ECDSA + int have_ecc_cert, ecdsa_ok, ecc_pkey_size; +#endif +#ifndef OPENSSL_NO_ECDH + int have_ecdh_tmp, ecdh_ok; +#endif +#ifndef OPENSSL_NO_EC + X509 *x = NULL; + EVP_PKEY *ecc_pkey = NULL; + int signature_nid = 0, pk_nid = 0, md_nid = 0; +#endif + if (c == NULL) + return; + + kl = SSL_C_EXPORT_PKEYLENGTH(cipher); + +#ifndef OPENSSL_NO_RSA + rsa_tmp = (c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL); + rsa_tmp_export = (c->rsa_tmp_cb != NULL || + (rsa_tmp && RSA_size(c->rsa_tmp) * 8 <= kl)); +#else + rsa_tmp = rsa_tmp_export = 0; +#endif +#ifndef OPENSSL_NO_DH + dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL); + dh_tmp_export = (c->dh_tmp_cb != NULL || + (dh_tmp && DH_size(c->dh_tmp) * 8 <= kl)); +#else + dh_tmp = dh_tmp_export = 0; +#endif + +#ifndef OPENSSL_NO_ECDH + have_ecdh_tmp = (c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto); +#endif + cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]); + rsa_enc = cpk->valid_flags & CERT_PKEY_VALID; + rsa_enc_export = (rsa_enc && EVP_PKEY_size(cpk->privatekey) * 8 <= kl); + cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]); + rsa_sign = cpk->valid_flags & CERT_PKEY_SIGN; + cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]); + dsa_sign = cpk->valid_flags & CERT_PKEY_SIGN; + cpk = &(c->pkeys[SSL_PKEY_DH_RSA]); + dh_rsa = cpk->valid_flags & CERT_PKEY_VALID; + dh_rsa_export = (dh_rsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl); + cpk = &(c->pkeys[SSL_PKEY_DH_DSA]); +/* FIX THIS EAY EAY EAY */ + dh_dsa = cpk->valid_flags & CERT_PKEY_VALID; + dh_dsa_export = (dh_dsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl); + cpk = &(c->pkeys[SSL_PKEY_ECC]); +#ifndef OPENSSL_NO_EC + have_ecc_cert = cpk->valid_flags & CERT_PKEY_VALID; +#endif + mask_k = 0; + mask_a = 0; + emask_k = 0; + emask_a = 0; + +#ifdef CIPHER_DEBUG + fprintf(stderr, + "rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n", + rsa_tmp, rsa_tmp_export, dh_tmp, have_ecdh_tmp, rsa_enc, + rsa_enc_export, rsa_sign, dsa_sign, dh_rsa, dh_dsa); +#endif + + cpk = &(c->pkeys[SSL_PKEY_GOST01]); + if (cpk->x509 != NULL && cpk->privatekey != NULL) { + mask_k |= SSL_kGOST; + mask_a |= SSL_aGOST01; + } + cpk = &(c->pkeys[SSL_PKEY_GOST94]); + if (cpk->x509 != NULL && cpk->privatekey != NULL) { + mask_k |= SSL_kGOST; + mask_a |= SSL_aGOST94; + } + + if (rsa_enc || (rsa_tmp && rsa_sign)) + mask_k |= SSL_kRSA; + if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc))) + emask_k |= SSL_kRSA; + +#if 0 + /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */ + if ((dh_tmp || dh_rsa || dh_dsa) && (rsa_enc || rsa_sign || dsa_sign)) + mask_k |= SSL_kEDH; + if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) && + (rsa_enc || rsa_sign || dsa_sign)) + emask_k |= SSL_kEDH; +#endif + + if (dh_tmp_export) + emask_k |= SSL_kEDH; + + if (dh_tmp) + mask_k |= SSL_kEDH; + + if (dh_rsa) + mask_k |= SSL_kDHr; + if (dh_rsa_export) + emask_k |= SSL_kDHr; + + if (dh_dsa) + mask_k |= SSL_kDHd; + if (dh_dsa_export) + emask_k |= SSL_kDHd; + + if (mask_k & (SSL_kDHr | SSL_kDHd)) + mask_a |= SSL_aDH; + + if (rsa_enc || rsa_sign) { + mask_a |= SSL_aRSA; + emask_a |= SSL_aRSA; + } + + if (dsa_sign) { + mask_a |= SSL_aDSS; + emask_a |= SSL_aDSS; + } + + mask_a |= SSL_aNULL; + emask_a |= SSL_aNULL; + +#ifndef OPENSSL_NO_KRB5 + mask_k |= SSL_kKRB5; + mask_a |= SSL_aKRB5; + emask_k |= SSL_kKRB5; + emask_a |= SSL_aKRB5; +#endif + + /* + * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites + * depending on the key usage extension. + */ +#ifndef OPENSSL_NO_EC + if (have_ecc_cert) { + cpk = &c->pkeys[SSL_PKEY_ECC]; + x = cpk->x509; + /* This call populates extension flags (ex_flags) */ + X509_check_purpose(x, -1, 0); +# ifndef OPENSSL_NO_ECDH + ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ? + (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1; +# endif + ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ? + (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1; + if (!(cpk->valid_flags & CERT_PKEY_SIGN)) + ecdsa_ok = 0; + ecc_pkey = X509_get_pubkey(x); + ecc_pkey_size = (ecc_pkey != NULL) ? EVP_PKEY_bits(ecc_pkey) : 0; + EVP_PKEY_free(ecc_pkey); + if ((x->sig_alg) && (x->sig_alg->algorithm)) { + signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); + OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); + } +# ifndef OPENSSL_NO_ECDH + if (ecdh_ok) { + + if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) { + mask_k |= SSL_kECDHr; + mask_a |= SSL_aECDH; + if (ecc_pkey_size <= 163) { + emask_k |= SSL_kECDHr; + emask_a |= SSL_aECDH; + } + } + + if (pk_nid == NID_X9_62_id_ecPublicKey) { + mask_k |= SSL_kECDHe; + mask_a |= SSL_aECDH; + if (ecc_pkey_size <= 163) { + emask_k |= SSL_kECDHe; + emask_a |= SSL_aECDH; + } + } + } +# endif +# ifndef OPENSSL_NO_ECDSA + if (ecdsa_ok) { + mask_a |= SSL_aECDSA; + emask_a |= SSL_aECDSA; + } +# endif + } +#endif + +#ifndef OPENSSL_NO_ECDH + if (have_ecdh_tmp) { + mask_k |= SSL_kEECDH; + emask_k |= SSL_kEECDH; + } +#endif + +#ifndef OPENSSL_NO_PSK + mask_k |= SSL_kPSK; + mask_a |= SSL_aPSK; + emask_k |= SSL_kPSK; + emask_a |= SSL_aPSK; +#endif + + c->mask_k = mask_k; + c->mask_a = mask_a; + c->export_mask_k = emask_k; + c->export_mask_a = emask_a; + c->valid = 1; +} + +/* This handy macro borrowed from crypto/x509v3/v3_purp.c */ +#define ku_reject(x, usage) \ + (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage))) + +#ifndef OPENSSL_NO_EC + +int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) +{ + unsigned long alg_k, alg_a; + EVP_PKEY *pkey = NULL; + int keysize = 0; + int signature_nid = 0, md_nid = 0, pk_nid = 0; + const SSL_CIPHER *cs = s->s3->tmp.new_cipher; + + alg_k = cs->algorithm_mkey; + alg_a = cs->algorithm_auth; + + if (SSL_C_IS_EXPORT(cs)) { + /* ECDH key length in export ciphers must be <= 163 bits */ + pkey = X509_get_pubkey(x); + if (pkey == NULL) + return 0; + keysize = EVP_PKEY_bits(pkey); + EVP_PKEY_free(pkey); + if (keysize > 163) + return 0; + } + + /* This call populates the ex_flags field correctly */ + X509_check_purpose(x, -1, 0); + if ((x->sig_alg) && (x->sig_alg->algorithm)) { + signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); + OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); + } + if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr) { + /* key usage, if present, must allow key agreement */ + if (ku_reject(x, X509v3_KU_KEY_AGREEMENT)) { + SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, + SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT); + return 0; + } + if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION) { + /* signature alg must be ECDSA */ + if (pk_nid != NID_X9_62_id_ecPublicKey) { + SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, + SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE); + return 0; + } + } + if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION) { + /* signature alg must be RSA */ + + if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa) { + SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, + SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE); + return 0; + } + } + } + if (alg_a & SSL_aECDSA) { + /* key usage, if present, must allow signing */ + if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE)) { + SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, + SSL_R_ECC_CERT_NOT_FOR_SIGNING); + return 0; + } + } + + return 1; /* all checks are ok */ +} + +#endif + +static int ssl_get_server_cert_index(const SSL *s) +{ + int idx; + idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); + if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509) + idx = SSL_PKEY_RSA_SIGN; + if (idx == -1) + SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX, ERR_R_INTERNAL_ERROR); + return idx; +} + +CERT_PKEY *ssl_get_server_send_pkey(const SSL *s) +{ + CERT *c; + int i; + + c = s->cert; + if (!s->s3 || !s->s3->tmp.new_cipher) + return NULL; + ssl_set_cert_masks(c, s->s3->tmp.new_cipher); + +#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL + /* + * Broken protocol test: return last used certificate: which may mismatch + * the one expected. + */ + if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL) + return c->key; +#endif + + i = ssl_get_server_cert_index(s); + + /* This may or may not be an error. */ + if (i < 0) + return NULL; + + /* May be NULL. */ + return &c->pkeys[i]; +} + +EVP_PKEY *ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, + const EVP_MD **pmd) +{ + unsigned long alg_a; + CERT *c; + int idx = -1; + + alg_a = cipher->algorithm_auth; + c = s->cert; + +#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL + /* + * Broken protocol test: use last key: which may mismatch the one + * expected. + */ + if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL) + idx = c->key - c->pkeys; + else +#endif + + if ((alg_a & SSL_aDSS) && + (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL)) + idx = SSL_PKEY_DSA_SIGN; + else if (alg_a & SSL_aRSA) { + if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) + idx = SSL_PKEY_RSA_SIGN; + else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) + idx = SSL_PKEY_RSA_ENC; + } else if ((alg_a & SSL_aECDSA) && + (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) + idx = SSL_PKEY_ECC; + if (idx == -1) { + SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR); + return (NULL); + } + if (pmd) + *pmd = c->pkeys[idx].digest; + return c->pkeys[idx].privatekey; +} + +#ifndef OPENSSL_NO_TLSEXT +int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo, + size_t *serverinfo_length) +{ + CERT *c = NULL; + int i = 0; + *serverinfo_length = 0; + + c = s->cert; + i = ssl_get_server_cert_index(s); + + if (i == -1) + return 0; + if (c->pkeys[i].serverinfo == NULL) + return 0; + + *serverinfo = c->pkeys[i].serverinfo; + *serverinfo_length = c->pkeys[i].serverinfo_length; + return 1; +} +#endif + +void ssl_update_cache(SSL *s, int mode) +{ + int i; + + /* + * If the session_id_length is 0, we are not supposed to cache it, and it + * would be rather hard to do anyway :-) + */ + if (s->session->session_id_length == 0) + return; + + i = s->session_ctx->session_cache_mode; + if ((i & mode) && (!s->hit) + && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) + || SSL_CTX_add_session(s->session_ctx, s->session)) + && (s->session_ctx->new_session_cb != NULL)) { + CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION); + if (!s->session_ctx->new_session_cb(s, s->session)) + SSL_SESSION_free(s->session); + } + + /* auto flush every 255 connections */ + if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) { + if ((((mode & SSL_SESS_CACHE_CLIENT) + ? s->session_ctx->stats.sess_connect_good + : s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) { + SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL)); + } + } +} + +const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx) +{ + return ctx->method; +} + +const SSL_METHOD *SSL_get_ssl_method(SSL *s) +{ + return (s->method); +} + +int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth) +{ + int conn = -1; + int ret = 1; + + if (s->method != meth) { + if (s->handshake_func != NULL) + conn = (s->handshake_func == s->method->ssl_connect); + + if (s->method->version == meth->version) + s->method = meth; + else { + s->method->ssl_free(s); + s->method = meth; + ret = s->method->ssl_new(s); + } + + if (conn == 1) + s->handshake_func = meth->ssl_connect; + else if (conn == 0) + s->handshake_func = meth->ssl_accept; + } + return (ret); +} + +int SSL_get_error(const SSL *s, int i) +{ + int reason; + unsigned long l; + BIO *bio; + + if (i > 0) + return (SSL_ERROR_NONE); + + /* + * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc, + * where we do encode the error + */ + if ((l = ERR_peek_error()) != 0) { + if (ERR_GET_LIB(l) == ERR_LIB_SYS) + return (SSL_ERROR_SYSCALL); + else + return (SSL_ERROR_SSL); + } + + if ((i < 0) && SSL_want_read(s)) { + bio = SSL_get_rbio(s); + if (BIO_should_read(bio)) + return (SSL_ERROR_WANT_READ); + else if (BIO_should_write(bio)) + /* + * This one doesn't make too much sense ... We never try to write + * to the rbio, and an application program where rbio and wbio + * are separate couldn't even know what it should wait for. + * However if we ever set s->rwstate incorrectly (so that we have + * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and + * wbio *are* the same, this test works around that bug; so it + * might be safer to keep it. + */ + return (SSL_ERROR_WANT_WRITE); + else if (BIO_should_io_special(bio)) { + reason = BIO_get_retry_reason(bio); + if (reason == BIO_RR_CONNECT) + return (SSL_ERROR_WANT_CONNECT); + else if (reason == BIO_RR_ACCEPT) + return (SSL_ERROR_WANT_ACCEPT); + else + return (SSL_ERROR_SYSCALL); /* unknown */ + } + } + + if ((i < 0) && SSL_want_write(s)) { + bio = SSL_get_wbio(s); + if (BIO_should_write(bio)) + return (SSL_ERROR_WANT_WRITE); + else if (BIO_should_read(bio)) + /* + * See above (SSL_want_read(s) with BIO_should_write(bio)) + */ + return (SSL_ERROR_WANT_READ); + else if (BIO_should_io_special(bio)) { + reason = BIO_get_retry_reason(bio); + if (reason == BIO_RR_CONNECT) + return (SSL_ERROR_WANT_CONNECT); + else if (reason == BIO_RR_ACCEPT) + return (SSL_ERROR_WANT_ACCEPT); + else + return (SSL_ERROR_SYSCALL); + } + } + if ((i < 0) && SSL_want_x509_lookup(s)) { + return (SSL_ERROR_WANT_X509_LOOKUP); + } + + if (i == 0) { + if (s->version == SSL2_VERSION) { + /* assume it is the socket being closed */ + return (SSL_ERROR_ZERO_RETURN); + } else { + if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && + (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) + return (SSL_ERROR_ZERO_RETURN); + } + } + return (SSL_ERROR_SYSCALL); +} + +int SSL_do_handshake(SSL *s) +{ + int ret = 1; + + if (s->handshake_func == NULL) { + SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET); + return (-1); + } + + s->method->ssl_renegotiate_check(s); + + if (SSL_in_init(s) || SSL_in_before(s)) { + ret = s->handshake_func(s); + } + return (ret); +} + +/* + * For the next 2 functions, SSL_clear() sets shutdown and so one of these + * calls will reset it + */ +void SSL_set_accept_state(SSL *s) +{ + s->server = 1; + s->shutdown = 0; + s->state = SSL_ST_ACCEPT | SSL_ST_BEFORE; + s->handshake_func = s->method->ssl_accept; + /* clear the current cipher */ + ssl_clear_cipher_ctx(s); + ssl_clear_hash_ctx(&s->read_hash); + ssl_clear_hash_ctx(&s->write_hash); +} + +void SSL_set_connect_state(SSL *s) +{ + s->server = 0; + s->shutdown = 0; + s->state = SSL_ST_CONNECT | SSL_ST_BEFORE; + s->handshake_func = s->method->ssl_connect; + /* clear the current cipher */ + ssl_clear_cipher_ctx(s); + ssl_clear_hash_ctx(&s->read_hash); + ssl_clear_hash_ctx(&s->write_hash); +} + +int ssl_undefined_function(SSL *s) +{ + SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return (0); +} + +int ssl_undefined_void_function(void) +{ + SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return (0); +} + +int ssl_undefined_const_function(const SSL *s) +{ + SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return (0); +} + +SSL_METHOD *ssl_bad_method(int ver) +{ + SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return (NULL); +} + +const char *SSL_get_version(const SSL *s) +{ + if (s->version == TLS1_2_VERSION) + return ("TLSv1.2"); + else if (s->version == TLS1_1_VERSION) + return ("TLSv1.1"); + else if (s->version == TLS1_VERSION) + return ("TLSv1"); + else if (s->version == SSL3_VERSION) + return ("SSLv3"); + else if (s->version == SSL2_VERSION) + return ("SSLv2"); + else if (s->version == DTLS1_BAD_VER) + return ("DTLSv0.9"); + else if (s->version == DTLS1_VERSION) + return ("DTLSv1"); + else if (s->version == DTLS1_2_VERSION) + return ("DTLSv1.2"); + else + return ("unknown"); +} + +SSL *SSL_dup(SSL *s) +{ + STACK_OF(X509_NAME) *sk; + X509_NAME *xn; + SSL *ret; + int i; + + if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL) + return (NULL); + + ret->version = s->version; + ret->type = s->type; + ret->method = s->method; + + if (s->session != NULL) { + /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */ + SSL_copy_session_id(ret, s); + } else { + /* + * No session has been established yet, so we have to expect that + * s->cert or ret->cert will be changed later -- they should not both + * point to the same object, and thus we can't use + * SSL_copy_session_id. + */ + + ret->method->ssl_free(ret); + ret->method = s->method; + ret->method->ssl_new(ret); + + if (s->cert != NULL) { + if (ret->cert != NULL) { + ssl_cert_free(ret->cert); + } + ret->cert = ssl_cert_dup(s->cert); + if (ret->cert == NULL) + goto err; + } + + SSL_set_session_id_context(ret, s->sid_ctx, s->sid_ctx_length); + } + + ret->options = s->options; + ret->mode = s->mode; + SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s)); + SSL_set_read_ahead(ret, SSL_get_read_ahead(s)); + ret->msg_callback = s->msg_callback; + ret->msg_callback_arg = s->msg_callback_arg; + SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s)); + SSL_set_verify_depth(ret, SSL_get_verify_depth(s)); + ret->generate_session_id = s->generate_session_id; + + SSL_set_info_callback(ret, SSL_get_info_callback(s)); + + ret->debug = s->debug; + + /* copy app data, a little dangerous perhaps */ + if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data)) + goto err; + + /* setup rbio, and wbio */ + if (s->rbio != NULL) { + if (!BIO_dup_state(s->rbio, (char *)&ret->rbio)) + goto err; + } + if (s->wbio != NULL) { + if (s->wbio != s->rbio) { + if (!BIO_dup_state(s->wbio, (char *)&ret->wbio)) + goto err; + } else + ret->wbio = ret->rbio; + } + ret->rwstate = s->rwstate; + ret->in_handshake = s->in_handshake; + ret->handshake_func = s->handshake_func; + ret->server = s->server; + ret->renegotiate = s->renegotiate; + ret->new_session = s->new_session; + ret->quiet_shutdown = s->quiet_shutdown; + ret->shutdown = s->shutdown; + ret->state = s->state; /* SSL_dup does not really work at any state, + * though */ + ret->rstate = s->rstate; + ret->init_num = 0; /* would have to copy ret->init_buf, + * ret->init_msg, ret->init_num, + * ret->init_off */ + ret->hit = s->hit; + + X509_VERIFY_PARAM_inherit(ret->param, s->param); + + /* dup the cipher_list and cipher_list_by_id stacks */ + if (s->cipher_list != NULL) { + if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL) + goto err; + } + if (s->cipher_list_by_id != NULL) + if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id)) + == NULL) + goto err; + + /* Dup the client_CA list */ + if (s->client_CA != NULL) { + if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL) + goto err; + ret->client_CA = sk; + for (i = 0; i < sk_X509_NAME_num(sk); i++) { + xn = sk_X509_NAME_value(sk, i); + if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) { + X509_NAME_free(xn); + goto err; + } + } + } + + if (0) { + err: + if (ret != NULL) + SSL_free(ret); + ret = NULL; + } + return (ret); +} + +void ssl_clear_cipher_ctx(SSL *s) +{ + if (s->enc_read_ctx != NULL) { + EVP_CIPHER_CTX_cleanup(s->enc_read_ctx); + OPENSSL_free(s->enc_read_ctx); + s->enc_read_ctx = NULL; + } + if (s->enc_write_ctx != NULL) { + EVP_CIPHER_CTX_cleanup(s->enc_write_ctx); + OPENSSL_free(s->enc_write_ctx); + s->enc_write_ctx = NULL; + } +#ifndef OPENSSL_NO_COMP + if (s->expand != NULL) { + COMP_CTX_free(s->expand); + s->expand = NULL; + } + if (s->compress != NULL) { + COMP_CTX_free(s->compress); + s->compress = NULL; + } +#endif +} + +X509 *SSL_get_certificate(const SSL *s) +{ + if (s->cert != NULL) + return (s->cert->key->x509); + else + return (NULL); +} + +EVP_PKEY *SSL_get_privatekey(const SSL *s) +{ + if (s->cert != NULL) + return (s->cert->key->privatekey); + else + return (NULL); +} + +X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) +{ + if (ctx->cert != NULL) + return ctx->cert->key->x509; + else + return NULL; +} + +EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx) +{ + if (ctx->cert != NULL) + return ctx->cert->key->privatekey; + else + return NULL; +} + +const SSL_CIPHER *SSL_get_current_cipher(const SSL *s) +{ + if ((s->session != NULL) && (s->session->cipher != NULL)) + return (s->session->cipher); + return (NULL); +} + +#ifdef OPENSSL_NO_COMP +const void *SSL_get_current_compression(SSL *s) +{ + return NULL; +} + +const void *SSL_get_current_expansion(SSL *s) +{ + return NULL; +} +#else + +const COMP_METHOD *SSL_get_current_compression(SSL *s) +{ + if (s->compress != NULL) + return (s->compress->meth); + return (NULL); +} + +const COMP_METHOD *SSL_get_current_expansion(SSL *s) +{ + if (s->expand != NULL) + return (s->expand->meth); + return (NULL); +} +#endif + +int ssl_init_wbio_buffer(SSL *s, int push) +{ + BIO *bbio; + + if (s->bbio == NULL) { + bbio = BIO_new(BIO_f_buffer()); + if (bbio == NULL) + return (0); + s->bbio = bbio; + } else { + bbio = s->bbio; + if (s->bbio == s->wbio) + s->wbio = BIO_pop(s->wbio); + } + (void)BIO_reset(bbio); +/* if (!BIO_set_write_buffer_size(bbio,16*1024)) */ + if (!BIO_set_read_buffer_size(bbio, 1)) { + SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB); + return (0); + } + if (push) { + if (s->wbio != bbio) + s->wbio = BIO_push(bbio, s->wbio); + } else { + if (s->wbio == bbio) + s->wbio = BIO_pop(bbio); + } + return (1); +} + +void ssl_free_wbio_buffer(SSL *s) +{ + if (s->bbio == NULL) + return; + + if (s->bbio == s->wbio) { + /* remove buffering */ + s->wbio = BIO_pop(s->wbio); +#ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids + * adding one more preprocessor symbol */ + assert(s->wbio != NULL); +#endif + } + BIO_free(s->bbio); + s->bbio = NULL; +} + +void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) +{ + ctx->quiet_shutdown = mode; +} + +int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) +{ + return (ctx->quiet_shutdown); +} + +void SSL_set_quiet_shutdown(SSL *s, int mode) +{ + s->quiet_shutdown = mode; +} + +int SSL_get_quiet_shutdown(const SSL *s) +{ + return (s->quiet_shutdown); +} + +void SSL_set_shutdown(SSL *s, int mode) +{ + s->shutdown = mode; +} + +int SSL_get_shutdown(const SSL *s) +{ + return (s->shutdown); +} + +int SSL_version(const SSL *s) +{ + return (s->version); +} + +SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl) +{ + return (ssl->ctx); +} + +SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx) +{ + CERT *ocert = ssl->cert; + if (ssl->ctx == ctx) + return ssl->ctx; +#ifndef OPENSSL_NO_TLSEXT + if (ctx == NULL) + ctx = ssl->initial_ctx; +#endif + ssl->cert = ssl_cert_dup(ctx->cert); + if (ocert) { + /* Preserve any already negotiated parameters */ + if (ssl->server) { + ssl->cert->peer_sigalgs = ocert->peer_sigalgs; + ssl->cert->peer_sigalgslen = ocert->peer_sigalgslen; + ocert->peer_sigalgs = NULL; + ssl->cert->ciphers_raw = ocert->ciphers_raw; + ssl->cert->ciphers_rawlen = ocert->ciphers_rawlen; + ocert->ciphers_raw = NULL; + } +#ifndef OPENSSL_NO_TLSEXT + ssl->cert->alpn_proposed = ocert->alpn_proposed; + ssl->cert->alpn_proposed_len = ocert->alpn_proposed_len; + ocert->alpn_proposed = NULL; + ssl->cert->alpn_sent = ocert->alpn_sent; +#endif + ssl_cert_free(ocert); + } + + /* + * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH), + * so setter APIs must prevent invalid lengths from entering the system. + */ + OPENSSL_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)); + + /* + * If the session ID context matches that of the parent SSL_CTX, + * inherit it from the new SSL_CTX as well. If however the context does + * not match (i.e., it was set per-ssl with SSL_set_session_id_context), + * leave it unchanged. + */ + if ((ssl->ctx != NULL) && + (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) && + (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) { + ssl->sid_ctx_length = ctx->sid_ctx_length; + memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx)); + } + + CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); + if (ssl->ctx != NULL) + SSL_CTX_free(ssl->ctx); /* decrement reference count */ + ssl->ctx = ctx; + + return (ssl->ctx); +} + +#ifndef OPENSSL_NO_STDIO +int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) +{ + return (X509_STORE_set_default_paths(ctx->cert_store)); +} + +int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, + const char *CApath) +{ + return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath)); +} +#endif + +void SSL_set_info_callback(SSL *ssl, + void (*cb) (const SSL *ssl, int type, int val)) +{ + ssl->info_callback = cb; +} + +/* + * One compiler (Diab DCC) doesn't like argument names in returned function + * pointer. + */ +void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ , + int /* type */ , + int /* val */ ) { + return ssl->info_callback; +} + +int SSL_state(const SSL *ssl) +{ + return (ssl->state); +} + +void SSL_set_state(SSL *ssl, int state) +{ + ssl->state = state; +} + +void SSL_set_verify_result(SSL *ssl, long arg) +{ + ssl->verify_result = arg; +} + +long SSL_get_verify_result(const SSL *ssl) +{ + return (ssl->verify_result); +} + +int SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, + CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) +{ + return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, + new_func, dup_func, free_func); +} + +int SSL_set_ex_data(SSL *s, int idx, void *arg) +{ + return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); +} + +void *SSL_get_ex_data(const SSL *s, int idx) +{ + return (CRYPTO_get_ex_data(&s->ex_data, idx)); +} + +int SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, + CRYPTO_EX_dup *dup_func, + CRYPTO_EX_free *free_func) +{ + return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, + new_func, dup_func, free_func); +} + +int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) +{ + return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); +} + +void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) +{ + return (CRYPTO_get_ex_data(&s->ex_data, idx)); +} + +int ssl_ok(SSL *s) +{ + return (1); +} + +X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx) +{ + return (ctx->cert_store); +} + +void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) +{ + if (ctx->cert_store != NULL) + X509_STORE_free(ctx->cert_store); + ctx->cert_store = store; +} + +int SSL_want(const SSL *s) +{ + return (s->rwstate); +} + +/** + * \brief Set the callback for generating temporary RSA keys. + * \param ctx the SSL context. + * \param cb the callback + */ + +#ifndef OPENSSL_NO_RSA +void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb) (SSL *ssl, + int is_export, + int keylength)) +{ + SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb); +} + +void SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb) (SSL *ssl, + int is_export, + int keylength)) +{ + SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb); +} +#endif + +#ifdef DOXYGEN +/** + * \brief The RSA temporary key callback function. + * \param ssl the SSL session. + * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite. + * \param keylength if \c is_export is \c TRUE, then \c keylength is the size + * of the required key in bits. + * \return the temporary RSA key. + * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback + */ + +RSA *cb(SSL *ssl, int is_export, int keylength) +{ +} +#endif + +/** + * \brief Set the callback for generating temporary DH keys. + * \param ctx the SSL context. + * \param dh the callback + */ + +#ifndef OPENSSL_NO_DH +void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, + DH *(*dh) (SSL *ssl, int is_export, + int keylength)) +{ + SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); +} + +void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export, + int keylength)) +{ + SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); +} +#endif + +#ifndef OPENSSL_NO_ECDH +void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, + EC_KEY *(*ecdh) (SSL *ssl, int is_export, + int keylength)) +{ + SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, + (void (*)(void))ecdh); +} + +void SSL_set_tmp_ecdh_callback(SSL *ssl, + EC_KEY *(*ecdh) (SSL *ssl, int is_export, + int keylength)) +{ + SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB, (void (*)(void))ecdh); +} +#endif + +#ifndef OPENSSL_NO_PSK +int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint) +{ + if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { + SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, + SSL_R_DATA_LENGTH_TOO_LONG); + return 0; + } + if (ctx->psk_identity_hint != NULL) + OPENSSL_free(ctx->psk_identity_hint); + if (identity_hint != NULL) { + ctx->psk_identity_hint = BUF_strdup(identity_hint); + if (ctx->psk_identity_hint == NULL) + return 0; + } else + ctx->psk_identity_hint = NULL; + return 1; +} + +int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint) +{ + if (s == NULL) + return 0; + + if (s->session == NULL) + return 1; /* session not created yet, ignored */ + + if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { + SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG); + return 0; + } + if (s->session->psk_identity_hint != NULL) + OPENSSL_free(s->session->psk_identity_hint); + if (identity_hint != NULL) { + s->session->psk_identity_hint = BUF_strdup(identity_hint); + if (s->session->psk_identity_hint == NULL) + return 0; + } else + s->session->psk_identity_hint = NULL; + return 1; +} + +const char *SSL_get_psk_identity_hint(const SSL *s) +{ + if (s == NULL || s->session == NULL) + return NULL; + return (s->session->psk_identity_hint); +} + +const char *SSL_get_psk_identity(const SSL *s) +{ + if (s == NULL || s->session == NULL) + return NULL; + return (s->session->psk_identity); +} + +void SSL_set_psk_client_callback(SSL *s, + unsigned int (*cb) (SSL *ssl, + const char *hint, + char *identity, + unsigned int + max_identity_len, + unsigned char *psk, + unsigned int + max_psk_len)) +{ + s->psk_client_callback = cb; +} + +void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, + unsigned int (*cb) (SSL *ssl, + const char *hint, + char *identity, + unsigned int + max_identity_len, + unsigned char *psk, + unsigned int + max_psk_len)) +{ + ctx->psk_client_callback = cb; +} + +void SSL_set_psk_server_callback(SSL *s, + unsigned int (*cb) (SSL *ssl, + const char *identity, + unsigned char *psk, + unsigned int + max_psk_len)) +{ + s->psk_server_callback = cb; +} + +void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, + unsigned int (*cb) (SSL *ssl, + const char *identity, + unsigned char *psk, + unsigned int + max_psk_len)) +{ + ctx->psk_server_callback = cb; +} +#endif + +void SSL_CTX_set_msg_callback(SSL_CTX *ctx, + void (*cb) (int write_p, int version, + int content_type, const void *buf, + size_t len, SSL *ssl, void *arg)) +{ + SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); +} + +void SSL_set_msg_callback(SSL *ssl, + void (*cb) (int write_p, int version, + int content_type, const void *buf, + size_t len, SSL *ssl, void *arg)) +{ + SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); +} + +/* + * Allocates new EVP_MD_CTX and sets pointer to it into given pointer + * vairable, freeing EVP_MD_CTX previously stored in that variable, if any. + * If EVP_MD pointer is passed, initializes ctx with this md Returns newly + * allocated ctx; + */ + +EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md) +{ + ssl_clear_hash_ctx(hash); + *hash = EVP_MD_CTX_create(); + if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) { + EVP_MD_CTX_destroy(*hash); + *hash = NULL; + return NULL; + } + return *hash; +} + +void ssl_clear_hash_ctx(EVP_MD_CTX **hash) +{ + + if (*hash) + EVP_MD_CTX_destroy(*hash); + *hash = NULL; +} + +void SSL_set_debug(SSL *s, int debug) +{ + s->debug = debug; +} + +int SSL_cache_hit(SSL *s) +{ + return s->hit; +} + +int SSL_is_server(SSL *s) +{ + return s->server; +} + +#if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16) +# include "../crypto/bio/bss_file.c" +#endif + +IMPLEMENT_STACK_OF(SSL_CIPHER) +IMPLEMENT_STACK_OF(SSL_COMP) +IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id); |