293 lines
7.6 KiB
C
293 lines
7.6 KiB
C
/*****************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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* License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Curl.
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*
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* The Initial Developer of the Original Code is Daniel Stenberg.
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*
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* Portions created by the Initial Developer are Copyright (C) 1998.
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* All Rights Reserved.
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*
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* ------------------------------------------------------------
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* Main author:
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* - Daniel Stenberg <daniel@haxx.se>
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*
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* http://curl.haxx.se
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*
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* $Source$
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* $Revision$
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* $Date$
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* $Author$
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* $State$
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* $Locker$
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*
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* ------------------------------------------------------------
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****************************************************************************/
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/*
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* The original SSL code was written by
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* Linas Vepstas <linas@linas.org> and Sampo Kellomaki <sampo@iki.fi>
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*/
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#include "setup.h"
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#include <string.h>
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#include <stdlib.h>
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#include "urldata.h"
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#include "sendf.h"
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#include "formdata.h" /* for the boundary function */
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#ifdef USE_SSLEAY
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static char global_passwd[64];
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static int passwd_callback(char *buf, int num, int verify
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#if OPENSSL_VERSION_NUMBER >= 0x00904100L
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/* This was introduced in 0.9.4, we can set this
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using SSL_CTX_set_default_passwd_cb_userdata()
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*/
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, void *userdata
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#endif
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)
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{
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if(verify)
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fprintf(stderr, "%s\n", buf);
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else {
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if(num > strlen(global_passwd)) {
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strcpy(buf, global_passwd);
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return strlen(buf);
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}
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}
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return 0;
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}
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/* This function is *highly* inspired by (and parts are directly stolen
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* from) source from the SSLeay package written by Eric Young
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* (eay@cryptsoft.com). */
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int SSL_cert_stuff(struct UrlData *data,
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char *cert_file,
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char *key_file)
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{
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if (cert_file != NULL) {
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SSL *ssl;
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X509 *x509;
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if(data->cert_passwd) {
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/*
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* If password has been given, we store that in the global
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* area (*shudder*) for a while:
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*/
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strcpy(global_passwd, data->cert_passwd);
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/* Set passwd callback: */
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SSL_CTX_set_default_passwd_cb(data->ctx, passwd_callback);
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}
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if (SSL_CTX_use_certificate_file(data->ctx,
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cert_file,
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SSL_FILETYPE_PEM) <= 0) {
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failf(data, "unable to set certificate file (wrong password?)\n");
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return(0);
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}
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if (key_file == NULL)
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key_file=cert_file;
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if (SSL_CTX_use_PrivateKey_file(data->ctx,
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key_file,
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SSL_FILETYPE_PEM) <= 0) {
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failf(data, "unable to set public key file\n");
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return(0);
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}
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ssl=SSL_new(data->ctx);
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x509=SSL_get_certificate(ssl);
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if (x509 != NULL)
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EVP_PKEY_copy_parameters(X509_get_pubkey(x509),
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SSL_get_privatekey(ssl));
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SSL_free(ssl);
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/* If we are using DSA, we can copy the parameters from
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* the private key */
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/* Now we know that a key and cert have been set against
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* the SSL context */
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if (!SSL_CTX_check_private_key(data->ctx)) {
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failf(data, "Private key does not match the certificate public key\n");
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return(0);
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}
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/* erase it now */
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memset(global_passwd, 0, sizeof(global_passwd));
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}
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return(1);
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}
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#endif
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#if SSL_VERIFY_CERT
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int cert_verify_callback(int ok, X509_STORE_CTX *ctx)
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{
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X509 *err_cert;
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char buf[256];
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err_cert=X509_STORE_CTX_get_current_cert(ctx);
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X509_NAME_oneline(X509_get_subject_name(err_cert),buf,256);
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return 1;
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}
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#endif
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/* ====================================================== */
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int
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UrgSSLConnect (struct UrlData *data)
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{
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#ifdef USE_SSLEAY
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int err;
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char * str;
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SSL_METHOD *req_method;
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/* mark this is being ssl enabled from here on out. */
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data->use_ssl = 1;
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/* Lets get nice error messages */
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SSL_load_error_strings();
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#ifdef HAVE_RAND_STATUS
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/* RAND_status() was introduced in OpenSSL 0.9.5 */
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if(0 == RAND_status())
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#endif
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{
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/* We need to seed the PRNG properly! */
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#ifdef HAVE_RAND_SCREEN
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/* This one gets a random value by reading the currently shown screen */
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RAND_screen();
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#else
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int len;
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char *area = MakeFormBoundary();
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if(!area)
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return 3; /* out of memory */
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len = strlen(area);
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RAND_seed(area, len);
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free(area); /* now remove the random junk */
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#endif
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}
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/* Setup all the global SSL stuff */
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SSLeay_add_ssl_algorithms();
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switch(data->ssl_version) {
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default:
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req_method = SSLv23_client_method();
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break;
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case 2:
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req_method = SSLv2_client_method();
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break;
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case 3:
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req_method = SSLv3_client_method();
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break;
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}
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data->ctx = SSL_CTX_new(req_method);
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if(!data->ctx) {
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failf(data, "SSL: couldn't create a context!");
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return 1;
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}
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if(data->cert) {
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if (!SSL_cert_stuff(data, data->cert, data->cert)) {
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failf(data, "couldn't use certificate!\n");
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return 2;
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}
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}
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#if SSL_VERIFY_CERT
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SSL_CTX_set_verify(data->ctx,
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SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT|
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SSL_VERIFY_CLIENT_ONCE,
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cert_verify_callback);
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#endif
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/* Lets make an SSL structure */
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data->ssl = SSL_new (data->ctx);
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SSL_set_connect_state (data->ssl);
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data->server_cert = 0x0;
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/* pass the raw socket into the SSL layers */
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SSL_set_fd (data->ssl, data->firstsocket);
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err = SSL_connect (data->ssl);
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if (-1 == err) {
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err = ERR_get_error();
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failf(data, "SSL: %s", ERR_error_string(err, NULL));
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return 10;
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}
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infof (data, "SSL connection using %s\n", SSL_get_cipher (data->ssl));
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/* Get server's certificate (note: beware of dynamic allocation) - opt */
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/* major serious hack alert -- we should check certificates
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* to authenticate the server; otherwise we risk man-in-the-middle
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* attack
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*/
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data->server_cert = SSL_get_peer_certificate (data->ssl);
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if(!data->server_cert) {
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failf(data, "SSL: couldn't get peer certificate!");
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return 3;
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}
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infof (data, "Server certificate:\n");
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str = X509_NAME_oneline (X509_get_subject_name (data->server_cert), NULL, 0);
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if(!str) {
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failf(data, "SSL: couldn't get X509-subject!");
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return 4;
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}
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infof(data, "\t subject: %s\n", str);
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CRYPTO_free(str);
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str = X509_NAME_oneline (X509_get_issuer_name (data->server_cert), NULL, 0);
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if(!str) {
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failf(data, "SSL: couldn't get X509-issuer name!");
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return 5;
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}
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infof(data, "\t issuer: %s\n", str);
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CRYPTO_free(str);
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/* We could do all sorts of certificate verification stuff here before
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deallocating the certificate. */
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#if SSL_VERIFY_CERT
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infof(data, "Verify result: %d\n", SSL_get_verify_result(data->ssl));
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#endif
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X509_free(data->server_cert);
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#else /* USE_SSLEAY */
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/* this is for "-ansi -Wall -pedantic" to stop complaining! (rabe) */
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(void) data;
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#endif
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return 0;
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}
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