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575 lines
16 KiB
575 lines
16 KiB
/*
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curlx.c Authors: Peter Sylvester, Jean-Paul Merlin
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This is a little program to demonstrate the usage of
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- an ssl initialisation callback setting a user key and trustbases
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coming from a pkcs12 file
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- using an ssl application callback to find a URI in the
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certificate presented during ssl session establishment.
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*/
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/* <DESC>
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* demonstrates use of SSL context callback, requires OpenSSL
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* </DESC>
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*/
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/*
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* Copyright (c) 2003 - 2020 The OpenEvidence Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, the following disclaimer,
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* and the original OpenSSL and SSLeay Licences below.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions, the following disclaimer
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* and the original OpenSSL and SSLeay Licences below in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgments:
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* "This product includes software developed by the Openevidence Project
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* for use in the OpenEvidence Toolkit. (http://www.openevidence.org/)"
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* This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (https://www.openssl.org/)"
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com)."
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*
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* 4. The names "OpenEvidence Toolkit" and "OpenEvidence Project" must not be
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* used to endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openevidence-core@openevidence.org.
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*
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* 5. Products derived from this software may not be called "OpenEvidence"
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* nor may "OpenEvidence" appear in their names without prior written
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* permission of the OpenEvidence Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgments:
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* "This product includes software developed by the OpenEvidence Project
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* for use in the OpenEvidence Toolkit (http://www.openevidence.org/)
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* This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (https://www.openssl.org/)"
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com)."
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenEvidence PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenEvidence PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (https://www.openssl.org/)
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <curl/curl.h>
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#include <openssl/x509v3.h>
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#include <openssl/x509_vfy.h>
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#include <openssl/crypto.h>
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#include <openssl/lhash.h>
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#include <openssl/objects.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/pkcs12.h>
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#include <openssl/bio.h>
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#include <openssl/ssl.h>
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static const char *curlx_usage[]={
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"usage: curlx args\n",
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" -p12 arg - tia file ",
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" -envpass arg - environment variable which content the tia private"
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" key password",
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" -out arg - output file (response)- default stdout",
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" -in arg - input file (request)- default stdin",
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" -connect arg - URL of the server for the connection ex:"
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" www.openevidence.org",
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" -mimetype arg - MIME type for data in ex : application/timestamp-query"
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" or application/dvcs -default application/timestamp-query",
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" -acceptmime arg - MIME type acceptable for the response ex : "
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"application/timestamp-response or application/dvcs -default none",
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" -accesstype arg - an Object identifier in an AIA/SIA method, e.g."
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" AD_DVCS or ad_timestamping",
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NULL
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};
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/*
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./curlx -p12 psy.p12 -envpass XX -in request -verbose -accesstype AD_DVCS
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-mimetype application/dvcs -acceptmime application/dvcs -out response
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*/
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/*
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* We use this ZERO_NULL to avoid picky compiler warnings,
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* when assigning a NULL pointer to a function pointer var.
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*/
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#define ZERO_NULL 0
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/* This is a context that we pass to all callbacks */
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typedef struct sslctxparm_st {
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unsigned char *p12file;
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const char *pst;
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PKCS12 *p12;
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EVP_PKEY *pkey;
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X509 *usercert;
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STACK_OF(X509) * ca;
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CURL *curl;
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BIO *errorbio;
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int accesstype;
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int verbose;
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} sslctxparm;
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/* some helper function. */
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static char *ia5string(ASN1_IA5STRING *ia5)
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{
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char *tmp;
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if(!ia5 || !ia5->length)
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return NULL;
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tmp = OPENSSL_malloc(ia5->length + 1);
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memcpy(tmp, ia5->data, ia5->length);
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tmp[ia5->length] = 0;
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return tmp;
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}
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/* A convenience routine to get an access URI. */
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static unsigned char *my_get_ext(X509 *cert, const int type,
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int extensiontype)
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{
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int i;
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STACK_OF(ACCESS_DESCRIPTION) * accessinfo;
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accessinfo = X509_get_ext_d2i(cert, extensiontype, NULL, NULL);
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if(!sk_ACCESS_DESCRIPTION_num(accessinfo))
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return NULL;
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for(i = 0; i < sk_ACCESS_DESCRIPTION_num(accessinfo); i++) {
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ACCESS_DESCRIPTION * ad = sk_ACCESS_DESCRIPTION_value(accessinfo, i);
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if(OBJ_obj2nid(ad->method) == type) {
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if(ad->location->type == GEN_URI) {
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return ia5string(ad->location->d.ia5);
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}
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return NULL;
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}
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}
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return NULL;
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}
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/* This is an application verification call back, it does not
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perform any addition verification but tries to find a URL
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in the presented certificate. If found, this will become
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the URL to be used in the POST.
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*/
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static int ssl_app_verify_callback(X509_STORE_CTX *ctx, void *arg)
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{
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sslctxparm * p = (sslctxparm *) arg;
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int ok;
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if(p->verbose > 2)
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BIO_printf(p->errorbio, "entering ssl_app_verify_callback\n");
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ok = X509_verify_cert(ctx);
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if(ok && ctx->cert) {
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unsigned char *accessinfo;
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if(p->verbose > 1)
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X509_print_ex(p->errorbio, ctx->cert, 0, 0);
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accessinfo = my_get_ext(ctx->cert, p->accesstype, NID_sinfo_access);
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if(accessinfo) {
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if(p->verbose)
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BIO_printf(p->errorbio, "Setting URL from SIA to: %s\n", accessinfo);
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curl_easy_setopt(p->curl, CURLOPT_URL, accessinfo);
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}
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else if(accessinfo = my_get_ext(ctx->cert, p->accesstype,
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NID_info_access)) {
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if(p->verbose)
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BIO_printf(p->errorbio, "Setting URL from AIA to: %s\n", accessinfo);
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curl_easy_setopt(p->curl, CURLOPT_URL, accessinfo);
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}
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}
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if(p->verbose > 2)
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BIO_printf(p->errorbio, "leaving ssl_app_verify_callback with %d\n", ok);
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return ok;
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}
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/* The SSL initialisation callback. The callback sets:
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- a private key and certificate
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- a trusted ca certificate
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- a preferred cipherlist
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- an application verification callback (the function above)
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*/
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static CURLcode sslctxfun(CURL *curl, void *sslctx, void *parm)
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{
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sslctxparm *p = (sslctxparm *) parm;
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SSL_CTX *ctx = (SSL_CTX *) sslctx;
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if(!SSL_CTX_use_certificate(ctx, p->usercert)) {
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BIO_printf(p->errorbio, "SSL_CTX_use_certificate problem\n");
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goto err;
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}
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if(!SSL_CTX_use_PrivateKey(ctx, p->pkey)) {
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BIO_printf(p->errorbio, "SSL_CTX_use_PrivateKey\n");
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goto err;
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}
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if(!SSL_CTX_check_private_key(ctx)) {
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BIO_printf(p->errorbio, "SSL_CTX_check_private_key\n");
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goto err;
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}
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SSL_CTX_set_quiet_shutdown(ctx, 1);
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SSL_CTX_set_cipher_list(ctx, "RC4-MD5");
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SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
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X509_STORE_add_cert(SSL_CTX_get_cert_store(ctx),
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sk_X509_value(p->ca, sk_X509_num(p->ca)-1));
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SSL_CTX_set_verify_depth(ctx, 2);
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SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, ZERO_NULL);
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SSL_CTX_set_cert_verify_callback(ctx, ssl_app_verify_callback, parm);
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return CURLE_OK;
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err:
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ERR_print_errors(p->errorbio);
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return CURLE_SSL_CERTPROBLEM;
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}
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int main(int argc, char **argv)
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{
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BIO* in = NULL;
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BIO* out = NULL;
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char *outfile = NULL;
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char *infile = NULL;
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int tabLength = 100;
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char *binaryptr;
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char *mimetype = NULL;
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char *mimetypeaccept = NULL;
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char *contenttype;
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const char **pp;
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unsigned char *hostporturl = NULL;
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BIO *p12bio;
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char **args = argv + 1;
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unsigned char *serverurl;
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sslctxparm p;
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char *response;
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CURLcode res;
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struct curl_slist *headers = NULL;
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int badarg = 0;
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binaryptr = malloc(tabLength);
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memset(&p, '\0', sizeof(p));
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p.errorbio = BIO_new_fp(stderr, BIO_NOCLOSE);
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curl_global_init(CURL_GLOBAL_DEFAULT);
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/* we need some more for the P12 decoding */
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OpenSSL_add_all_ciphers();
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OpenSSL_add_all_digests();
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ERR_load_crypto_strings();
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while(*args && *args[0] == '-') {
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if(!strcmp (*args, "-in")) {
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if(args[1]) {
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infile = *(++args);
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}
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else
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badarg = 1;
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}
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else if(!strcmp (*args, "-out")) {
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if(args[1]) {
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outfile = *(++args);
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}
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else
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badarg = 1;
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}
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else if(!strcmp (*args, "-p12")) {
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if(args[1]) {
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p.p12file = *(++args);
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}
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else
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badarg = 1;
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}
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else if(strcmp(*args, "-envpass") == 0) {
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if(args[1]) {
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p.pst = getenv(*(++args));
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}
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else
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badarg = 1;
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}
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else if(strcmp(*args, "-connect") == 0) {
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if(args[1]) {
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hostporturl = *(++args);
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}
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else
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badarg = 1;
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}
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else if(strcmp(*args, "-mimetype") == 0) {
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if(args[1]) {
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mimetype = *(++args);
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}
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else
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badarg = 1;
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}
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else if(strcmp(*args, "-acceptmime") == 0) {
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if(args[1]) {
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mimetypeaccept = *(++args);
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}
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else
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badarg = 1;
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}
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else if(strcmp(*args, "-accesstype") == 0) {
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if(args[1]) {
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p.accesstype = OBJ_obj2nid(OBJ_txt2obj(*++args, 0));
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if(p.accesstype == 0)
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badarg = 1;
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}
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else
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badarg = 1;
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}
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else if(strcmp(*args, "-verbose") == 0) {
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p.verbose++;
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}
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else
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badarg = 1;
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args++;
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}
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if(mimetype == NULL || mimetypeaccept == NULL || p.p12file == NULL)
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badarg = 1;
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if(badarg) {
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for(pp = curlx_usage; (*pp != NULL); pp++)
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BIO_printf(p.errorbio, "%s\n", *pp);
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BIO_printf(p.errorbio, "\n");
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goto err;
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}
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/* set input */
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in = BIO_new(BIO_s_file());
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if(in == NULL) {
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BIO_printf(p.errorbio, "Error setting input bio\n");
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goto err;
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}
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else if(infile == NULL)
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BIO_set_fp(in, stdin, BIO_NOCLOSE|BIO_FP_TEXT);
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else if(BIO_read_filename(in, infile) <= 0) {
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BIO_printf(p.errorbio, "Error opening input file %s\n", infile);
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BIO_free(in);
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goto err;
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}
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/* set output */
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out = BIO_new(BIO_s_file());
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if(out == NULL) {
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BIO_printf(p.errorbio, "Error setting output bio.\n");
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goto err;
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}
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else if(outfile == NULL)
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BIO_set_fp(out, stdout, BIO_NOCLOSE|BIO_FP_TEXT);
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else if(BIO_write_filename(out, outfile) <= 0) {
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BIO_printf(p.errorbio, "Error opening output file %s\n", outfile);
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BIO_free(out);
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goto err;
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}
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|
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p.errorbio = BIO_new_fp(stderr, BIO_NOCLOSE);
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p.curl = curl_easy_init();
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if(!p.curl) {
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BIO_printf(p.errorbio, "Cannot init curl lib\n");
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|
goto err;
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|
}
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|
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p12bio = BIO_new_file(p.p12file, "rb");
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|
if(!p12bio) {
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BIO_printf(p.errorbio, "Error opening P12 file %s\n", p.p12file);
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|
goto err;
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}
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p.p12 = d2i_PKCS12_bio(p12bio, NULL);
|
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if(!p.p12) {
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BIO_printf(p.errorbio, "Cannot decode P12 structure %s\n", p.p12file);
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|
goto err;
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|
}
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|
|
|
p.ca = NULL;
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|
if(!(PKCS12_parse (p.p12, p.pst, &(p.pkey), &(p.usercert), &(p.ca) ) )) {
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|
BIO_printf(p.errorbio, "Invalid P12 structure in %s\n", p.p12file);
|
|
goto err;
|
|
}
|
|
|
|
if(sk_X509_num(p.ca) <= 0) {
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BIO_printf(p.errorbio, "No trustworthy CA given.%s\n", p.p12file);
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|
goto err;
|
|
}
|
|
|
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if(p.verbose > 1)
|
|
X509_print_ex(p.errorbio, p.usercert, 0, 0);
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|
|
|
/* determine URL to go */
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|
|
|
if(hostporturl) {
|
|
size_t len = strlen(hostporturl) + 9;
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serverurl = malloc(len);
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snprintf(serverurl, len, "https://%s", hostporturl);
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|
}
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else if(p.accesstype != 0) { /* see whether we can find an AIA or SIA for a
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given access type */
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serverurl = my_get_ext(p.usercert, p.accesstype, NID_info_access);
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|
if(!serverurl) {
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|
int j = 0;
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|
BIO_printf(p.errorbio, "no service URL in user cert "
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|
"searching in others certificates\n");
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|
for(j = 0; j<sk_X509_num(p.ca); j++) {
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|
serverurl = my_get_ext(sk_X509_value(p.ca, j), p.accesstype,
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NID_info_access);
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|
if(serverurl)
|
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break;
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|
serverurl = my_get_ext(sk_X509_value(p.ca, j), p.accesstype,
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NID_sinfo_access);
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if(serverurl)
|
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break;
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|
}
|
|
}
|
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}
|
|
|
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if(!serverurl) {
|
|
BIO_printf(p.errorbio, "no service URL in certificates,"
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|
" check '-accesstype (AD_DVCS | ad_timestamping)'"
|
|
" or use '-connect'\n");
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|
goto err;
|
|
}
|
|
|
|
if(p.verbose)
|
|
BIO_printf(p.errorbio, "Service URL: <%s>\n", serverurl);
|
|
|
|
curl_easy_setopt(p.curl, CURLOPT_URL, serverurl);
|
|
|
|
/* Now specify the POST binary data */
|
|
|
|
curl_easy_setopt(p.curl, CURLOPT_POSTFIELDS, binaryptr);
|
|
curl_easy_setopt(p.curl, CURLOPT_POSTFIELDSIZE, (long)tabLength);
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|
|
|
/* pass our list of custom made headers */
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|
|
|
contenttype = malloc(15 + strlen(mimetype));
|
|
snprintf(contenttype, 15 + strlen(mimetype), "Content-type: %s", mimetype);
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|
headers = curl_slist_append(headers, contenttype);
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|
curl_easy_setopt(p.curl, CURLOPT_HTTPHEADER, headers);
|
|
|
|
if(p.verbose)
|
|
BIO_printf(p.errorbio, "Service URL: <%s>\n", serverurl);
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|
|
|
{
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|
FILE *outfp;
|
|
BIO_get_fp(out, &outfp);
|
|
curl_easy_setopt(p.curl, CURLOPT_WRITEDATA, outfp);
|
|
}
|
|
|
|
res = curl_easy_setopt(p.curl, CURLOPT_SSL_CTX_FUNCTION, sslctxfun);
|
|
|
|
if(res != CURLE_OK)
|
|
BIO_printf(p.errorbio, "%d %s=%d %d\n", __LINE__,
|
|
"CURLOPT_SSL_CTX_FUNCTION", CURLOPT_SSL_CTX_FUNCTION, res);
|
|
|
|
curl_easy_setopt(p.curl, CURLOPT_SSL_CTX_DATA, &p);
|
|
|
|
{
|
|
char *ptr;
|
|
int lu; int i = 0;
|
|
while((lu = BIO_read(in, &binaryptr[i], tabLength-i)) >0) {
|
|
i += lu;
|
|
if(i == tabLength) {
|
|
tabLength += 100;
|
|
ptr = realloc(binaryptr, tabLength); /* should be more careful */
|
|
if(!ptr) {
|
|
/* out of memory */
|
|
BIO_printf(p.errorbio, "out of memory (realloc returned NULL)\n");
|
|
goto fail;
|
|
}
|
|
binaryptr = ptr;
|
|
ptr = NULL;
|
|
}
|
|
}
|
|
tabLength = i;
|
|
}
|
|
/* Now specify the POST binary data */
|
|
|
|
curl_easy_setopt(p.curl, CURLOPT_POSTFIELDS, binaryptr);
|
|
curl_easy_setopt(p.curl, CURLOPT_POSTFIELDSIZE, (long)tabLength);
|
|
|
|
|
|
/* Perform the request, res will get the return code */
|
|
|
|
BIO_printf(p.errorbio, "%d %s %d\n", __LINE__, "curl_easy_perform",
|
|
res = curl_easy_perform(p.curl));
|
|
{
|
|
curl_easy_getinfo(p.curl, CURLINFO_CONTENT_TYPE, &response);
|
|
if(mimetypeaccept && p.verbose) {
|
|
if(!strcmp(mimetypeaccept, response))
|
|
BIO_printf(p.errorbio, "the response has a correct mimetype : %s\n",
|
|
response);
|
|
else
|
|
BIO_printf(p.errorbio, "the response doesn\'t have an acceptable "
|
|
"mime type, it is %s instead of %s\n",
|
|
response, mimetypeaccept);
|
|
}
|
|
}
|
|
|
|
/*** code d'erreur si accept mime ***, egalement code return HTTP != 200 ***/
|
|
|
|
/* free the header list*/
|
|
fail:
|
|
curl_slist_free_all(headers);
|
|
|
|
/* always cleanup */
|
|
curl_easy_cleanup(p.curl);
|
|
|
|
BIO_free(in);
|
|
BIO_free(out);
|
|
return (EXIT_SUCCESS);
|
|
|
|
err: BIO_printf(p.errorbio, "error");
|
|
exit(1);
|
|
}
|