/* $OpenBSD: ssl_cert.c,v 1.50 2015/04/06 04:09:59 guenther Exp $ */ /* 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. */ #include #include #include #include #include #include #include #include #include #include #include #include "ssl_locl.h" int SSL_get_ex_data_X509_STORE_CTX_idx(void) { static volatile int ssl_x509_store_ctx_idx = -1; int got_write_lock = 0; CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); if (ssl_x509_store_ctx_idx < 0) { CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); got_write_lock = 1; if (ssl_x509_store_ctx_idx < 0) { ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index( 0, "SSL for verify callback", NULL, NULL, NULL); } } if (got_write_lock) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); else CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); return ssl_x509_store_ctx_idx; } static void ssl_cert_set_default_md(CERT *cert) { /* Set digest values to defaults */ cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1(); cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1(); cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1(); cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1(); #ifndef OPENSSL_NO_GOST cert->pkeys[SSL_PKEY_GOST01].digest = EVP_gostr341194(); #endif } CERT * ssl_cert_new(void) { CERT *ret; ret = calloc(1, sizeof(CERT)); if (ret == NULL) { SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE); return (NULL); } ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]); ret->references = 1; ssl_cert_set_default_md(ret); return (ret); } CERT * ssl_cert_dup(CERT *cert) { CERT *ret; int i; ret = calloc(1, sizeof(CERT)); if (ret == NULL) { SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE); return (NULL); } /* * same as ret->key = ret->pkeys + (cert->key - cert->pkeys), * if you find that more readable */ ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]]; ret->valid = cert->valid; ret->mask_k = cert->mask_k; ret->mask_a = cert->mask_a; if (cert->dh_tmp != NULL) { ret->dh_tmp = DHparams_dup(cert->dh_tmp); if (ret->dh_tmp == NULL) { SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB); goto err; } if (cert->dh_tmp->priv_key) { BIGNUM *b = BN_dup(cert->dh_tmp->priv_key); if (!b) { SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB); goto err; } ret->dh_tmp->priv_key = b; } if (cert->dh_tmp->pub_key) { BIGNUM *b = BN_dup(cert->dh_tmp->pub_key); if (!b) { SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB); goto err; } ret->dh_tmp->pub_key = b; } } ret->dh_tmp_cb = cert->dh_tmp_cb; ret->dh_tmp_auto = cert->dh_tmp_auto; if (cert->ecdh_tmp) { ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp); if (ret->ecdh_tmp == NULL) { SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB); goto err; } } ret->ecdh_tmp_cb = cert->ecdh_tmp_cb; ret->ecdh_tmp_auto = cert->ecdh_tmp_auto; for (i = 0; i < SSL_PKEY_NUM; i++) { if (cert->pkeys[i].x509 != NULL) { ret->pkeys[i].x509 = cert->pkeys[i].x509; CRYPTO_add(&ret->pkeys[i].x509->references, 1, CRYPTO_LOCK_X509); } if (cert->pkeys[i].privatekey != NULL) { ret->pkeys[i].privatekey = cert->pkeys[i].privatekey; CRYPTO_add(&ret->pkeys[i].privatekey->references, 1, CRYPTO_LOCK_EVP_PKEY); switch (i) { /* * If there was anything special to do for * certain types of keys, we'd do it here. * (Nothing at the moment, I think.) */ case SSL_PKEY_RSA_ENC: case SSL_PKEY_RSA_SIGN: /* We have an RSA key. */ break; case SSL_PKEY_DSA_SIGN: /* We have a DSA key. */ break; case SSL_PKEY_DH_RSA: case SSL_PKEY_DH_DSA: /* We have a DH key. */ break; case SSL_PKEY_ECC: /* We have an ECC key */ break; default: /* Can't happen. */ SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG); } } } /* * ret->extra_certs *should* exist, but currently the own certificate * chain is held inside SSL_CTX */ ret->references = 1; /* * Set digests to defaults. NB: we don't copy existing values * as they will be set during handshake. */ ssl_cert_set_default_md(ret); return (ret); err: DH_free(ret->dh_tmp); EC_KEY_free(ret->ecdh_tmp); for (i = 0; i < SSL_PKEY_NUM; i++) { if (ret->pkeys[i].x509 != NULL) X509_free(ret->pkeys[i].x509); EVP_PKEY_free(ret->pkeys[i].privatekey); } free (ret); return NULL; } void ssl_cert_free(CERT *c) { int i; if (c == NULL) return; i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT); if (i > 0) return; DH_free(c->dh_tmp); EC_KEY_free(c->ecdh_tmp); for (i = 0; i < SSL_PKEY_NUM; i++) { if (c->pkeys[i].x509 != NULL) X509_free(c->pkeys[i].x509); EVP_PKEY_free(c->pkeys[i].privatekey); } free(c); } int ssl_cert_inst(CERT **o) { /* * Create a CERT if there isn't already one * (which cannot really happen, as it is initially created in * SSL_CTX_new; but the earlier code usually allows for that one * being non-existant, so we follow that behaviour, as it might * turn out that there actually is a reason for it -- but I'm * not sure that *all* of the existing code could cope with * s->cert being NULL, otherwise we could do without the * initialization in SSL_CTX_new). */ if (o == NULL) { SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER); return (0); } if (*o == NULL) { if ((*o = ssl_cert_new()) == NULL) { SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE); return (0); } } return (1); } SESS_CERT * ssl_sess_cert_new(void) { SESS_CERT *ret; ret = calloc(1, sizeof *ret); if (ret == NULL) { SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE); return NULL; } ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]); ret->references = 1; return ret; } void ssl_sess_cert_free(SESS_CERT *sc) { int i; if (sc == NULL) return; i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT); if (i > 0) return; /* i == 0 */ if (sc->cert_chain != NULL) sk_X509_pop_free(sc->cert_chain, X509_free); for (i = 0; i < SSL_PKEY_NUM; i++) { if (sc->peer_pkeys[i].x509 != NULL) X509_free(sc->peer_pkeys[i].x509); } DH_free(sc->peer_dh_tmp); EC_KEY_free(sc->peer_ecdh_tmp); free(sc); } int ssl_set_peer_cert_type(SESS_CERT *sc, int type) { sc->peer_cert_type = type; return (1); } int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk) { X509_STORE_CTX ctx; X509 *x; int ret; if ((sk == NULL) || (sk_X509_num(sk) == 0)) return (0); x = sk_X509_value(sk, 0); if (!X509_STORE_CTX_init(&ctx, s->ctx->cert_store, x, sk)) { SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB); return (0); } X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s); /* * We need to inherit the verify parameters. These can be * determined by the context: if its a server it will verify * SSL client certificates or vice versa. */ X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server"); /* * Anything non-default in "param" should overwrite anything * in the ctx. */ X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param); if (s->verify_callback) X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback); if (s->ctx->app_verify_callback != NULL) ret = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); else ret = X509_verify_cert(&ctx); s->verify_result = ctx.error; X509_STORE_CTX_cleanup(&ctx); return (ret); } static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list, STACK_OF(X509_NAME) *name_list) { if (*ca_list != NULL) sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); *ca_list = name_list; } STACK_OF(X509_NAME) * SSL_dup_CA_list(STACK_OF(X509_NAME) *sk) { int i; STACK_OF(X509_NAME) *ret; X509_NAME *name; ret = sk_X509_NAME_new_null(); for (i = 0; i < sk_X509_NAME_num(sk); i++) { name = X509_NAME_dup(sk_X509_NAME_value(sk, i)); if ((name == NULL) || !sk_X509_NAME_push(ret, name)) { sk_X509_NAME_pop_free(ret, X509_NAME_free); return (NULL); } } return (ret); } void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list) { set_client_CA_list(&(s->client_CA), name_list); } void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list) { set_client_CA_list(&(ctx->client_CA), name_list); } STACK_OF(X509_NAME) * SSL_CTX_get_client_CA_list(const SSL_CTX *ctx) { return (ctx->client_CA); } STACK_OF(X509_NAME) * SSL_get_client_CA_list(const SSL *s) { if (s->type == SSL_ST_CONNECT) { /* We are in the client. */ if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL)) return (s->s3->tmp.ca_names); else return (NULL); } else { if (s->client_CA != NULL) return (s->client_CA); else return (s->ctx->client_CA); } } static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x) { X509_NAME *name; if (x == NULL) return (0); if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL)) return (0); if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL) return (0); if (!sk_X509_NAME_push(*sk, name)) { X509_NAME_free(name); return (0); } return (1); } int SSL_add_client_CA(SSL *ssl, X509 *x) { return (add_client_CA(&(ssl->client_CA), x)); } int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x) { return (add_client_CA(&(ctx->client_CA), x)); } static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b) { return (X509_NAME_cmp(*a, *b)); } /*! * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed; * it doesn't really have anything to do with clients (except that a common use * for a stack of CAs is to send it to the client). Actually, it doesn't have * much to do with CAs, either, since it will load any old cert. * \param file the file containing one or more certs. * \return a ::STACK containing the certs. */ STACK_OF(X509_NAME) * SSL_load_client_CA_file(const char *file) { BIO *in; X509 *x = NULL; X509_NAME *xn = NULL; STACK_OF(X509_NAME) *ret = NULL, *sk; sk = sk_X509_NAME_new(xname_cmp); in = BIO_new(BIO_s_file_internal()); if ((sk == NULL) || (in == NULL)) { SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); goto err; } if (!BIO_read_filename(in, file)) goto err; for (;;) { if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) break; if (ret == NULL) { ret = sk_X509_NAME_new_null(); if (ret == NULL) { SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE); goto err; } } if ((xn = X509_get_subject_name(x)) == NULL) goto err; /* check for duplicates */ xn = X509_NAME_dup(xn); if (xn == NULL) goto err; if (sk_X509_NAME_find(sk, xn) >= 0) X509_NAME_free(xn); else { sk_X509_NAME_push(sk, xn); sk_X509_NAME_push(ret, xn); } } if (0) { err: if (ret != NULL) sk_X509_NAME_pop_free(ret, X509_NAME_free); ret = NULL; } if (sk != NULL) sk_X509_NAME_free(sk); BIO_free(in); if (x != NULL) X509_free(x); if (ret != NULL) ERR_clear_error(); return (ret); } /*! * Add a file of certs to a stack. * \param stack the stack to add to. * \param file the file to add from. All certs in this file that are not * already in the stack will be added. * \return 1 for success, 0 for failure. Note that in the case of failure some * certs may have been added to \c stack. */ int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *file) { BIO *in; X509 *x = NULL; X509_NAME *xn = NULL; int ret = 1; int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b); oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp); in = BIO_new(BIO_s_file_internal()); if (in == NULL) { SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE); goto err; } if (!BIO_read_filename(in, file)) goto err; for (;;) { if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL) break; if ((xn = X509_get_subject_name(x)) == NULL) goto err; xn = X509_NAME_dup(xn); if (xn == NULL) goto err; if (sk_X509_NAME_find(stack, xn) >= 0) X509_NAME_free(xn); else sk_X509_NAME_push(stack, xn); } ERR_clear_error(); if (0) { err: ret = 0; } BIO_free(in); if (x != NULL) X509_free(x); (void)sk_X509_NAME_set_cmp_func(stack, oldcmp); return ret; } /*! * Add a directory of certs to a stack. * \param stack the stack to append to. * \param dir the directory to append from. All files in this directory will be * examined as potential certs. Any that are acceptable to * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will * be included. * \return 1 for success, 0 for failure. Note that in the case of failure some * certs may have been added to \c stack. */ int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *dir) { DIR *dirp = NULL; char *path = NULL; int ret = 0; dirp = opendir(dir); if (dirp) { struct dirent *dp; while ((dp = readdir(dirp)) != NULL) { if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) { ret = SSL_add_file_cert_subjects_to_stack( stack, path); free(path); } if (!ret) break; } (void) closedir(dirp); } if (!ret) { SYSerr(SYS_F_OPENDIR, errno); ERR_asprintf_error_data("opendir ('%s')", dir); SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB); } return ret; }