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/*
* Copyright 2015-2024 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 <openssl/trace.h>
#include "ssl_local.h"
#include "internal/sslconf.h"
#include "internal/cryptlib.h"
/* SSL library configuration module. */
void SSL_add_ssl_module(void)
{
/* Do nothing. This will be added automatically by libcrypto */
}
static CONF_IMODULE *ssl_do_lookup_module(OSSL_LIB_CTX *libctx)
{
CONF_IMODULE *m = OSSL_LIB_CTX_get_data(libctx, OSSL_LIB_CTX_SSL_CONF_IMODULE);
if (m != NULL)
return m;
libctx = OSSL_LIB_CTX_get0_global_default();
return OSSL_LIB_CTX_get_data(libctx, OSSL_LIB_CTX_SSL_CONF_IMODULE);
}
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 err = 1;
unsigned int flags;
unsigned int conf_diagnostics = 0;
const SSL_METHOD *meth;
const SSL_CONF_CMD *cmds;
OSSL_LIB_CTX *libctx = NULL, *prev_libctx = NULL;
CONF_IMODULE *imod = NULL;
ERR_set_mark();
if (s == NULL && ctx == NULL) {
ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_NULL_PARAMETER);
goto err;
}
if (name == NULL && system)
name = "system_default";
if (name == NULL) {
ERR_raise_data(ERR_LIB_SSL, SSL_R_INVALID_CONFIGURATION_NAME,
"name not specified (name == NULL)");
goto err;
}
libctx = s != NULL ? s->ctx->libctx : ctx->libctx;
imod = ssl_do_lookup_module(libctx);
if (!conf_ssl_name_find(imod, name, &idx)) {
if (!system)
ERR_raise_data(ERR_LIB_SSL, SSL_R_INVALID_CONFIGURATION_NAME,
"name=%s", name);
goto err;
}
cmds = conf_ssl_get(imod, idx, &name, &cmd_count);
flags = SSL_CONF_FLAG_FILE;
if (!system)
flags |= SSL_CONF_FLAG_CERTIFICATE | SSL_CONF_FLAG_REQUIRE_PRIVATE;
cctx = SSL_CONF_CTX_new();
if (cctx == NULL) {
/* this is a fatal error, always report */
system = 0;
goto err;
}
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;
}
conf_diagnostics = OSSL_LIB_CTX_get_conf_diagnostics(libctx);
if (conf_diagnostics)
flags |= SSL_CONF_FLAG_SHOW_ERRORS;
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 = OSSL_LIB_CTX_set0_default(libctx);
err = 0;
for (i = 0; i < cmd_count; i++) {
char *cmdstr, *arg;
int rv;
conf_ssl_get_cmd(cmds, i, &cmdstr, &arg);
rv = SSL_CONF_cmd(cctx, cmdstr, arg);
if (rv <= 0)
++err;
}
if (!SSL_CONF_CTX_finish(cctx))
++err;
err:
OSSL_LIB_CTX_set0_default(prev_libctx);
SSL_CONF_CTX_free(cctx);
if (err == 0) {
ERR_pop_to_mark();
return 1;
}
if (system && !conf_diagnostics) {
/*
* Discard errors so that SSL_CTX_new does not return
* success with stale errors on the error stack.
*/
ERR_pop_to_mark();
return 1;
}
ERR_clear_last_mark();
return 0;
}
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);
}
int ssl_ctx_system_config(SSL_CTX *ctx)
{
return ssl_do_config(NULL, ctx, NULL, 1);
}
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