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      1 /*
      2  * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 #include <stdio.h>
     11 #include <openssl/conf.h>
     12 #include <openssl/ssl.h>
     13 #include "ssl_local.h"
     14 #include "internal/sslconf.h"
     15 
     16 /* SSL library configuration module. */
     17 
     18 void SSL_add_ssl_module(void)
     19 {
     20     /* Do nothing. This will be added automatically by libcrypto */
     21 }
     22 
     23 static int ssl_do_config(SSL *s, SSL_CTX *ctx, const char *name, int system)
     24 {
     25     SSL_CONF_CTX *cctx = NULL;
     26     size_t i, idx, cmd_count;
     27     int err = 1;
     28     unsigned int flags;
     29     const SSL_METHOD *meth;
     30     const SSL_CONF_CMD *cmds;
     31     OSSL_LIB_CTX *prev_libctx = NULL;
     32     OSSL_LIB_CTX *libctx = NULL;
     33 
     34     if (s == NULL && ctx == NULL) {
     35         ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_NULL_PARAMETER);
     36         goto err;
     37     }
     38 
     39     if (name == NULL && system)
     40         name = "system_default";
     41     if (!conf_ssl_name_find(name, &idx)) {
     42         if (!system)
     43             ERR_raise_data(ERR_LIB_SSL, SSL_R_INVALID_CONFIGURATION_NAME,
     44                            "name=%s", name);
     45         goto err;
     46     }
     47     cmds = conf_ssl_get(idx, &name, &cmd_count);
     48     cctx = SSL_CONF_CTX_new();
     49     if (cctx == NULL)
     50         goto err;
     51     flags = SSL_CONF_FLAG_FILE;
     52     if (!system)
     53         flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE;
     54     if (s != NULL) {
     55         meth = s->method;
     56         SSL_CONF_CTX_set_ssl(cctx, s);
     57         libctx = s->ctx->libctx;
     58     } else {
     59         meth = ctx->method;
     60         SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
     61         libctx = ctx->libctx;
     62     }
     63     if (meth->ssl_accept != ssl_undefined_function)
     64         flags |= SSL_CONF_FLAG_SERVER;
     65     if (meth->ssl_connect != ssl_undefined_function)
     66         flags |= SSL_CONF_FLAG_CLIENT;
     67     SSL_CONF_CTX_set_flags(cctx, flags);
     68     prev_libctx = OSSL_LIB_CTX_set0_default(libctx);
     69     err = 0;
     70     for (i = 0; i < cmd_count; i++) {
     71         char *cmdstr, *arg;
     72         int rv;
     73 
     74         conf_ssl_get_cmd(cmds, i, &cmdstr, &arg);
     75         rv = SSL_CONF_cmd(cctx, cmdstr, arg);
     76         if (rv <= 0)
     77             ++err;
     78     }
     79     if (!SSL_CONF_CTX_finish(cctx))
     80         ++err;
     81  err:
     82     OSSL_LIB_CTX_set0_default(prev_libctx);
     83     SSL_CONF_CTX_free(cctx);
     84     return err == 0;
     85 }
     86 
     87 int SSL_config(SSL *s, const char *name)
     88 {
     89     return ssl_do_config(s, NULL, name, 0);
     90 }
     91 
     92 int SSL_CTX_config(SSL_CTX *ctx, const char *name)
     93 {
     94     return ssl_do_config(NULL, ctx, name, 0);
     95 }
     96 
     97 void ssl_ctx_system_config(SSL_CTX *ctx)
     98 {
     99     ssl_do_config(NULL, ctx, NULL, 1);
    100 }
    101