/* $OpenBSD: ssl_cert.c,v 1.105 2022/11/26 16:08:55 tb 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_local.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; } SSL_CERT * ssl_cert_new(void) { SSL_CERT *ret; ret = calloc(1, sizeof(SSL_CERT)); if (ret == NULL) { SSLerrorx(ERR_R_MALLOC_FAILURE); return (NULL); } ret->key = &(ret->pkeys[SSL_PKEY_RSA]); ret->references = 1; ret->security_cb = ssl_security_default_cb; ret->security_level = OPENSSL_TLS_SECURITY_LEVEL; ret->security_ex_data = NULL; return (ret); } SSL_CERT * ssl_cert_dup(SSL_CERT *cert) { SSL_CERT *ret; int i; ret = calloc(1, sizeof(SSL_CERT)); if (ret == NULL) { SSLerrorx(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->dhe_params != NULL) { ret->dhe_params = DHparams_dup(cert->dhe_params); if (ret->dhe_params == NULL) { SSLerrorx(ERR_R_DH_LIB); goto err; } } ret->dhe_params_cb = cert->dhe_params_cb; ret->dhe_params_auto = cert->dhe_params_auto; for (i = 0; i < SSL_PKEY_NUM; i++) { if (cert->pkeys[i].x509 != NULL) { ret->pkeys[i].x509 = cert->pkeys[i].x509; X509_up_ref(ret->pkeys[i].x509); } if (cert->pkeys[i].privatekey != NULL) { ret->pkeys[i].privatekey = cert->pkeys[i].privatekey; EVP_PKEY_up_ref(ret->pkeys[i].privatekey); 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: /* We have an RSA key. */ break; case SSL_PKEY_ECC: /* We have an ECC key */ break; case SSL_PKEY_GOST01: /* We have a GOST key */ break; default: /* Can't happen. */ SSLerrorx(SSL_R_LIBRARY_BUG); } } if (cert->pkeys[i].chain != NULL) { if ((ret->pkeys[i].chain = X509_chain_up_ref(cert->pkeys[i].chain)) == NULL) goto err; } } ret->security_cb = cert->security_cb; ret->security_level = cert->security_level; ret->security_ex_data = cert->security_ex_data; /* * ret->extra_certs *should* exist, but currently the own certificate * chain is held inside SSL_CTX */ ret->references = 1; return (ret); err: DH_free(ret->dhe_params); for (i = 0; i < SSL_PKEY_NUM; i++) { X509_free(ret->pkeys[i].x509); EVP_PKEY_free(ret->pkeys[i].privatekey); sk_X509_pop_free(ret->pkeys[i].chain, X509_free); } free (ret); return NULL; } void ssl_cert_free(SSL_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->dhe_params); for (i = 0; i < SSL_PKEY_NUM; i++) { X509_free(c->pkeys[i].x509); EVP_PKEY_free(c->pkeys[i].privatekey); sk_X509_pop_free(c->pkeys[i].chain, X509_free); } free(c); } SSL_CERT * ssl_get0_cert(SSL_CTX *ctx, SSL *ssl) { if (ssl != NULL) return ssl->cert; return ctx->cert; } int ssl_cert_set0_chain(SSL_CTX *ctx, SSL *ssl, STACK_OF(X509) *chain) { SSL_CERT *ssl_cert; SSL_CERT_PKEY *cpk; X509 *x509; int ssl_err; int i; if ((ssl_cert = ssl_get0_cert(ctx, ssl)) == NULL) return 0; if ((cpk = ssl_cert->key) == NULL) return 0; for (i = 0; i < sk_X509_num(chain); i++) { x509 = sk_X509_value(chain, i); if (!ssl_security_cert(ctx, ssl, x509, 0, &ssl_err)) { SSLerrorx(ssl_err); return 0; } } sk_X509_pop_free(cpk->chain, X509_free); cpk->chain = chain; return 1; } int ssl_cert_set1_chain(SSL_CTX *ctx, SSL *ssl, STACK_OF(X509) *chain) { STACK_OF(X509) *new_chain = NULL; if (chain != NULL) { if ((new_chain = X509_chain_up_ref(chain)) == NULL) return 0; } if (!ssl_cert_set0_chain(ctx, ssl, new_chain)) { sk_X509_pop_free(new_chain, X509_free); return 0; } return 1; } int ssl_cert_add0_chain_cert(SSL_CTX *ctx, SSL *ssl, X509 *cert) { SSL_CERT *ssl_cert; SSL_CERT_PKEY *cpk; int ssl_err; if ((ssl_cert = ssl_get0_cert(ctx, ssl)) == NULL) return 0; if ((cpk = ssl_cert->key) == NULL) return 0; if (!ssl_security_cert(ctx, ssl, cert, 0, &ssl_err)) { SSLerrorx(ssl_err); return 0; } if (cpk->chain == NULL) { if ((cpk->chain = sk_X509_new_null()) == NULL) return 0; } if (!sk_X509_push(cpk->chain, cert)) return 0; return 1; } int ssl_cert_add1_chain_cert(SSL_CTX *ctx, SSL *ssl, X509 *cert) { if (!ssl_cert_add0_chain_cert(ctx, ssl, cert)) return 0; X509_up_ref(cert); return 1; } int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *certs) { X509_STORE_CTX *ctx = NULL; X509_VERIFY_PARAM *param; X509 *cert; int ret = 0; if (sk_X509_num(certs) < 1) goto err; if ((ctx = X509_STORE_CTX_new()) == NULL) goto err; cert = sk_X509_value(certs, 0); if (!X509_STORE_CTX_init(ctx, s->ctx->cert_store, cert, certs)) { SSLerror(s, ERR_R_X509_LIB); goto err; } 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"); param = X509_STORE_CTX_get0_param(ctx); X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s)); /* * Anything non-default in "param" should overwrite anything * in the ctx. */ X509_VERIFY_PARAM_set1(param, 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 = X509_STORE_CTX_get_error(ctx); sk_X509_pop_free(s->verified_chain, X509_free); s->verified_chain = NULL; if (X509_STORE_CTX_get0_chain(ctx) != NULL) { s->verified_chain = X509_STORE_CTX_get1_chain(ctx); if (s->verified_chain == NULL) { SSLerrorx(ERR_R_MALLOC_FAILURE); ret = 0; } } err: X509_STORE_CTX_free(ctx); return (ret); } static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list, STACK_OF(X509_NAME) *name_list) { sk_X509_NAME_pop_free(*ca_list, X509_NAME_free); *ca_list = name_list; } STACK_OF(X509_NAME) * SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk) { int i; STACK_OF(X509_NAME) *ret; X509_NAME *name = NULL; if ((ret = sk_X509_NAME_new_null()) == NULL) goto err; for (i = 0; i < sk_X509_NAME_num(sk); i++) { if ((name = X509_NAME_dup(sk_X509_NAME_value(sk, i))) == NULL) goto err; if (!sk_X509_NAME_push(ret, name)) goto err; } return (ret); err: X509_NAME_free(name); sk_X509_NAME_pop_free(ret, X509_NAME_free); return NULL; } 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->server) { /* We are in the client. */ if ((s->version >> 8) == SSL3_VERSION_MAJOR) return (s->s3->hs.tls12.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()); if ((sk == NULL) || (in == NULL)) { SSLerrorx(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) { SSLerrorx(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 { if (!sk_X509_NAME_push(sk, xn)) goto err; if (!sk_X509_NAME_push(ret, xn)) goto err; } } if (0) { err: sk_X509_NAME_pop_free(ret, X509_NAME_free); ret = NULL; } sk_X509_NAME_free(sk); BIO_free(in); 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()); if (in == NULL) { SSLerrorx(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 if (!sk_X509_NAME_push(stack, xn)) goto err; } ERR_clear_error(); if (0) { err: ret = 0; } BIO_free(in); 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) { SYSerror(errno); ERR_asprintf_error_data("opendir ('%s')", dir); SSLerrorx(ERR_R_SYS_LIB); } return ret; }