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/*
* Copyright (c) 2005 Darren Tucker <dtucker@zip.com.au>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define SSH_DONT_OVERLOAD_OPENSSL_FUNCS
#include "includes.h"
#ifdef WITH_OPENSSL
#include <stdarg.h>
#include <string.h>
#ifdef USE_OPENSSL_ENGINE
# include <openssl/engine.h>
# include <openssl/conf.h>
#endif
#include "log.h"
#include "openssl-compat.h"
/*
* OpenSSL version numbers: MNNFFPPS: major minor fix patch status
* Versions >=3 require only major versions to match.
* For versions <3, we accept compatible fix versions (so we allow 1.0.1
* to work with 1.0.0). Going backwards is only allowed within a patch series.
* See https://www.openssl.org/policies/releasestrat.html
*/
int
ssh_compatible_openssl(long headerver, long libver)
{
long mask, hfix, lfix;
/* exact match is always OK */
if (headerver == libver)
return 1;
/*
* For versions >= 3.0, only the major and status must match.
*/
if (headerver >= 0x3000000f) {
mask = 0xf000000fL; /* major,status */
return (headerver & mask) == (libver & mask);
}
/*
* For versions >= 1.0.0, but <3, major,minor,status must match and
* library fix version must be equal to or newer than the header.
*/
mask = 0xfff0000fL; /* major,minor,status */
hfix = (headerver & 0x000ff000) >> 12;
lfix = (libver & 0x000ff000) >> 12;
if ( (headerver & mask) == (libver & mask) && lfix >= hfix)
return 1;
return 0;
}
void
ssh_libcrypto_init(void)
{
#if defined(HAVE_OPENSSL_INIT_CRYPTO) && \
defined(OPENSSL_INIT_ADD_ALL_CIPHERS) && \
defined(OPENSSL_INIT_ADD_ALL_DIGESTS)
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS |
OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
#elif defined(HAVE_OPENSSL_ADD_ALL_ALGORITHMS)
OpenSSL_add_all_algorithms();
#endif
#ifdef USE_OPENSSL_ENGINE
/* Enable use of crypto hardware */
ENGINE_load_builtin_engines();
ENGINE_register_all_complete();
/* Load the libcrypto config file to pick up engines defined there */
# if defined(HAVE_OPENSSL_INIT_CRYPTO) && defined(OPENSSL_INIT_LOAD_CONFIG)
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS |
OPENSSL_INIT_ADD_ALL_DIGESTS | OPENSSL_INIT_LOAD_CONFIG, NULL);
# else
OPENSSL_config(NULL);
# endif
#endif /* USE_OPENSSL_ENGINE */
}
#ifndef HAVE_EVP_DIGESTSIGN
int
EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
const unsigned char *tbs, size_t tbslen)
{
if (sigret != NULL) {
if (EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
return 0;
}
return EVP_DigestSignFinal(ctx, sigret, siglen);
}
#endif
#ifndef HAVE_EVP_DIGESTVERIFY
int
EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret, size_t siglen,
const unsigned char *tbs, size_t tbslen)
{
if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
return -1;
return EVP_DigestVerifyFinal(ctx, sigret, siglen);
}
#endif
#endif /* WITH_OPENSSL */
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