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author | Dr. Stephen Henson <steve@openssl.org> | 2015-03-14 01:36:30 +0000 |
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committer | Dr. Stephen Henson <steve@openssl.org> | 2015-12-22 15:14:14 +0000 |
commit | 59b1696c0c752aeba67f40c91d6769afbc40469b (patch) | |
tree | 909e9dfcb29f2e9fd61fe1f2500b43a65620ba7f /ssl | |
parent | 4fae386cb0563a0c05c2817a5ccb3c18e6d62d8d (diff) | |
download | openssl-59b1696c0c752aeba67f40c91d6769afbc40469b.tar.gz |
SSL library configuration module.
This adds support for SSL/TLS configuration using configuration modules.
Sets of command value pairs are store and can be replayed through an
SSL_CTX or SSL structure using SSL_CTX_config or SSL_config.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Diffstat (limited to 'ssl')
-rw-r--r-- | ssl/ssl_mcnf.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/ssl/ssl_mcnf.c b/ssl/ssl_mcnf.c new file mode 100644 index 0000000000..a223c73ea7 --- /dev/null +++ b/ssl/ssl_mcnf.c @@ -0,0 +1,248 @@ +/* ssl_mcnf.c */ +/* + * Written by Stephen Henson (steve@openssl.org) for the OpenSSL project + * 2015. + */ +/* ==================================================================== + * Copyright (c) 2015 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 + * licensing@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). + * + */ + +#include <stdio.h> +#include <openssl/conf.h> +#include <openssl/ssl.h> +#include "ssl_locl.h" + +/* SSL library configuration module. */ + +struct ssl_conf_name { + /* Name of this set of commands */ + char *name; + /* List of commands */ + struct ssl_conf_cmd *cmds; + /* Number of commands */ + size_t cmd_count; +}; + +struct ssl_conf_cmd { + /* Command */ + char *cmd; + /* Argument */ + char *arg; +}; + +static struct ssl_conf_name *ssl_names; +static size_t ssl_names_count; + +static void ssl_module_free() +{ + size_t i, j; + if (ssl_names == NULL) + return; + for (i = 0; i < ssl_names_count; i++) { + struct ssl_conf_name *tname = ssl_names + i; + OPENSSL_free(tname->name); + for (j = 0; j < tname->cmd_count; j++) { + OPENSSL_free(tname->cmds[j].cmd); + OPENSSL_free(tname->cmds[j].arg); + } + OPENSSL_free(tname->cmds); + } + OPENSSL_free(ssl_names); + ssl_names = NULL; + ssl_names_count = 0; +} + +static int ssl_module_init(CONF_IMODULE *md, const CONF *cnf) +{ + size_t i, j, cnt; + int rv = 0; + const char *ssl_conf_section; + STACK_OF(CONF_VALUE) *cmd_lists; + ssl_conf_section = CONF_imodule_get_value(md); + cmd_lists = NCONF_get_section(cnf, ssl_conf_section); + if (sk_CONF_VALUE_num(cmd_lists) <= 0){ + if (cmd_lists == NULL) + SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_SECTION_NOT_FOUND); + else + SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_SECTION_EMPTY); + ERR_add_error_data(2, "section=", ssl_conf_section); + goto err; + } + cnt = sk_CONF_VALUE_num(cmd_lists); + ssl_names = OPENSSL_zalloc(sizeof(*ssl_names) * cnt); + ssl_names_count = cnt; + for (i = 0; i < ssl_names_count; i++) { + struct ssl_conf_name *ssl_name = ssl_names + i; + CONF_VALUE *sect = sk_CONF_VALUE_value(cmd_lists, i); + STACK_OF(CONF_VALUE) *cmds = NCONF_get_section(cnf, sect->value); + if (sk_CONF_VALUE_num(cmds) <= 0) { + if (cmds == NULL) + SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_COMMAND_SECTION_NOT_FOUND); + else + SSLerr(SSL_F_SSL_MODULE_INIT, SSL_R_SSL_COMMAND_SECTION_EMPTY); + ERR_add_error_data(4, "name=", sect->name, ", value=", sect->value); + goto err; + } + ssl_name->name = BUF_strdup(sect->name); + if (ssl_name->name == NULL) + goto err; + cnt = sk_CONF_VALUE_num(cmds); + ssl_name->cmds = OPENSSL_zalloc(cnt * sizeof(struct ssl_conf_cmd)); + if (ssl_name->cmds == NULL) + goto err; + ssl_name->cmd_count = cnt; + for (j = 0; j < cnt; j++) { + const char *name; + CONF_VALUE *cmd_conf = sk_CONF_VALUE_value(cmds, j); + struct ssl_conf_cmd *cmd = ssl_name->cmds + j; + /* Skip any initial dot in name */ + name = strchr(cmd_conf->name, '.'); + if (name != NULL) + name++; + else + name = cmd_conf->name; + cmd->cmd = BUF_strdup(name); + cmd->arg = BUF_strdup(cmd_conf->value); + if (cmd->cmd == NULL || cmd->arg == NULL) + goto err; + } + + } + rv = 1; + err: + if (rv == 0) + ssl_module_free(); + return rv; +} + +void SSL_add_ssl_module(void) +{ + CONF_module_add("ssl_conf", ssl_module_init, ssl_module_free); +} + +static const struct ssl_conf_name *ssl_name_find(const char *name) +{ + size_t i; + const struct ssl_conf_name *nm; + if (name == NULL) + return NULL; + for (i = 0, nm = ssl_names; i < ssl_names_count; i++, nm++) { + if (strcmp(nm->name, name) == 0) + return nm; + } + return NULL; +} + +static int ssl_do_config(SSL *s, SSL_CTX *ctx, const char *name) +{ + SSL_CONF_CTX *cctx = NULL; + size_t i; + int rv = 0; + unsigned int flags; + const SSL_METHOD *meth; + const struct ssl_conf_name *nm; + struct ssl_conf_cmd *cmd; + if (s == NULL && ctx == NULL) { + SSLerr(SSL_F_SSL_DO_CONFIG, ERR_R_PASSED_NULL_PARAMETER); + goto err; + } + nm = ssl_name_find(name); + if (nm == NULL) { + SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_INVALID_CONFIGURATION_NAME); + ERR_add_error_data(2, "name=", name); + goto err; + } + cctx = SSL_CONF_CTX_new(); + if (cctx == NULL) + goto err; + flags = SSL_CONF_FLAG_FILE; + flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE; + if (s != NULL) { + meth = s->method; + SSL_CONF_CTX_set_ssl(cctx, s); + } else { + meth = ctx->method; + SSL_CONF_CTX_set_ssl_ctx(cctx, ctx); + } + if (meth->ssl_accept != ssl_undefined_function) + flags |= SSL_CONF_FLAG_SERVER; + if (meth->ssl_connect != ssl_undefined_function) + flags |= SSL_CONF_FLAG_CLIENT; + SSL_CONF_CTX_set_flags(cctx, flags); + for (i = 0, cmd = nm->cmds; i < nm->cmd_count; i++, cmd++) { + rv = SSL_CONF_cmd(cctx, cmd->cmd, cmd->arg); + if (rv <= 0) { + if (rv == -2) + SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_UNKNOWN_COMMAND); + else + SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_BAD_VALUE); + ERR_add_error_data(6, "section=", name, ", cmd=", cmd->cmd, + ", arg=", cmd->arg); + goto err; + } + } + rv = SSL_CONF_CTX_finish(cctx); + err: + SSL_CONF_CTX_free(cctx); + return rv <= 0 ? 0 : 1; +} + +int SSL_config(SSL *s, const char *name) +{ + return ssl_do_config(s, NULL, name); +} + +int SSL_CTX_config(SSL_CTX *ctx, const char *name) +{ + return ssl_do_config(NULL, ctx, name); +} |