text: /*
   * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include <stdio.h>
  #include <openssl/conf.h>
  #include <openssl/ssl.h>
  #include "ssl_local.h"
  #include "internal/sslconf.h"
  
  /* SSL library configuration module. */
  
  void SSL_add_ssl_module(void)
  {
      /* Do nothing. This will be added automatically by libcrypto */
  }
  
  static int ssl_do_config(SSL *s, SSL_CTX *ctx, const char *name, int system)
  {
      SSL_CONF_CTX *cctx = NULL;
      size_t i, idx, cmd_count;
      int rv = 0;
      unsigned int flags;
      const SSL_METHOD *meth;
      const SSL_CONF_CMD *cmds;
      OPENSSL_CTX *prev_libctx = NULL;
      OPENSSL_CTX *libctx = NULL;
  
      if (s == NULL && ctx == NULL) {
          SSLerr(SSL_F_SSL_DO_CONFIG, ERR_R_PASSED_NULL_PARAMETER);
          goto err;
      }
  
      if (name == NULL && system)
          name = "system_default";
      if (!conf_ssl_name_find(name, &idx)) {
          if (!system) {
              SSLerr(SSL_F_SSL_DO_CONFIG, SSL_R_INVALID_CONFIGURATION_NAME);
              ERR_add_error_data(2, "name=", name);
          }
          goto err;
      }
      cmds = conf_ssl_get(idx, &name, &cmd_count);
      cctx = SSL_CONF_CTX_new();
      if (cctx == NULL)
          goto err;
      flags = SSL_CONF_FLAG_FILE;
      if (!system)
          flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE;
      if (s != NULL) {
          meth = s->method;
          SSL_CONF_CTX_set_ssl(cctx, s);
          libctx = s->ctx->libctx;
      } else {
          meth = ctx->method;
          SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
          libctx = ctx->libctx;
      }
      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);
      prev_libctx = OPENSSL_CTX_set0_default(libctx);
      for (i = 0; i < cmd_count; i++) {
          char *cmdstr, *arg;
  
          conf_ssl_get_cmd(cmds, i, &cmdstr, &arg);
          rv = SSL_CONF_cmd(cctx, cmdstr, 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=", cmdstr,
                                 ", arg=", arg);
              goto err;
          }
      }
      rv = SSL_CONF_CTX_finish(cctx);
   err:
      OPENSSL_CTX_set0_default(prev_libctx);
      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, 0);
  }
  
  int SSL_CTX_config(SSL_CTX *ctx, const char *name)
  {
      return ssl_do_config(NULL, ctx, name, 0);
  }
  
  void ssl_ctx_system_config(SSL_CTX *ctx)
  {
      ssl_do_config(NULL, ctx, NULL, 1);
  }
  