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/* $Id: openssl-compat.c,v 1.18 2014/06/17 13:06:08 dtucker Exp $ */
/*
* 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.
*/
#include "includes.h"
#include <stdarg.h>
#include <string.h>
#ifdef USE_OPENSSL_ENGINE
# include <openssl/engine.h>
# include <openssl/conf.h>
#endif
#ifndef HAVE_RSA_GET_DEFAULT_METHOD
# include <openssl/rsa.h>
#endif
#include "log.h"
#define SSH_DONT_OVERLOAD_OPENSSL_FUNCS
#include "openssl-compat.h"
/*
* OpenSSL version numbers: MNNFFPPS: major minor fix patch status
* We match major, minor, fix and status (not patch) for <1.0.0.
* After that, we acceptable compatible fix versions (so we
* allow 1.0.1 to work with 1.0.0). Going backwards is only allowed
* within a patch series.
*/
int
ssh_compatible_openssl(long headerver, long libver)
{
long mask, hfix, lfix;
/* exact match is always OK */
if (headerver == libver)
return 1;
/* for versions < 1.0.0, major,minor,fix,status must match */
if (headerver < 0x1000000f) {
mask = 0xfffff00fL; /* major,minor,fix,status */
return (headerver & mask) == (libver & mask);
}
/*
* For versions >= 1.0.0, 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;
}
#ifdef SSH_OLD_EVP
int
ssh_EVP_CipherInit(EVP_CIPHER_CTX *evp, const EVP_CIPHER *type,
unsigned char *key, unsigned char *iv, int enc)
{
EVP_CipherInit(evp, type, key, iv, enc);
return 1;
}
int
ssh_EVP_Cipher(EVP_CIPHER_CTX *evp, char *dst, char *src, int len)
{
EVP_Cipher(evp, dst, src, len);
return 1;
}
int
ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *evp)
{
EVP_CIPHER_CTX_cleanup(evp);
return 1;
}
#endif
#ifndef HAVE_EVP_DIGESTINIT_EX
int
EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *md, void *engine)
{
if (engine != NULL)
fatal("%s: ENGINE is not supported", __func__);
# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
EVP_DigestInit(ctx, md);
return 1;
# else
return EVP_DigestInit(ctx, md);
# endif
}
#endif
#ifndef HAVE_EVP_DIGESTFINAL_EX
int
EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *s)
{
# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
EVP_DigestFinal(ctx, md, s);
return 1;
# else
return EVP_DigestFinal(ctx, md, s);
# endif
}
#endif
#ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
int
ssh_EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *d, unsigned int cnt)
{
EVP_DigestUpdate(ctx, d, cnt);
return 1;
}
#endif
#ifndef HAVE_EVP_MD_CTX_COPY_EX
int
EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
{
return EVP_MD_CTX_copy(out, in);
}
#endif
#ifndef HAVE_BN_IS_PRIME_EX
int
BN_is_prime_ex(const BIGNUM *p, int nchecks, BN_CTX *ctx, void *cb)
{
if (cb != NULL)
fatal("%s: callback args not supported", __func__);
return BN_is_prime(p, nchecks, NULL, ctx, NULL);
}
#endif
#ifndef HAVE_RSA_GENERATE_KEY_EX
int
RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *bn_e, void *cb)
{
RSA *new_rsa, tmp_rsa;
unsigned long e;
if (cb != NULL)
fatal("%s: callback args not supported", __func__);
e = BN_get_word(bn_e);
if (e == 0xffffffffL)
fatal("%s: value of e too large", __func__);
new_rsa = RSA_generate_key(bits, e, NULL, NULL);
if (new_rsa == NULL)
return 0;
/* swap rsa/new_rsa then free new_rsa */
tmp_rsa = *rsa;
*rsa = *new_rsa;
*new_rsa = tmp_rsa;
RSA_free(new_rsa);
return 1;
}
#endif
#ifndef HAVE_DSA_GENERATE_PARAMETERS_EX
int
DSA_generate_parameters_ex(DSA *dsa, int bits, const unsigned char *seed,
int seed_len, int *counter_ret, unsigned long *h_ret, void *cb)
{
DSA *new_dsa, tmp_dsa;
if (cb != NULL)
fatal("%s: callback args not supported", __func__);
new_dsa = DSA_generate_parameters(bits, (unsigned char *)seed, seed_len,
counter_ret, h_ret, NULL, NULL);
if (new_dsa == NULL)
return 0;
/* swap dsa/new_dsa then free new_dsa */
tmp_dsa = *dsa;
*dsa = *new_dsa;
*new_dsa = tmp_dsa;
DSA_free(new_dsa);
return 1;
}
#endif
#ifndef HAVE_RSA_GET_DEFAULT_METHOD
RSA_METHOD *
RSA_get_default_method(void)
{
return RSA_PKCS1_SSLeay();
}
#endif
#ifdef USE_OPENSSL_ENGINE
void
ssh_OpenSSL_add_all_algorithms(void)
{
OpenSSL_add_all_algorithms();
/* Enable use of crypto hardware */
ENGINE_load_builtin_engines();
ENGINE_register_all_complete();
OPENSSL_config(NULL);
}
#endif
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