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287 lines
6.7 KiB
287 lines
6.7 KiB
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2004-2007
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ssl calls
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*/
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#include <stdlib.h> /* needed for openssl headers */
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#include <openssl/rc4.h>
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#include <openssl/md5.h>
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#include <openssl/sha.h>
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#include <openssl/bn.h>
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#include <openssl/rsa.h>
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#include "os_calls.h"
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#include "arch.h"
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#include "ssl_calls.h"
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#if defined(OPENSSL_VERSION_NUMBER) && (OPENSSL_VERSION_NUMBER >= 0x0090800f)
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#undef OLD_RSA_GEN1
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#else
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#define OLD_RSA_GEN1
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#endif
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/* rc4 stuff */
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/*****************************************************************************/
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void* APP_CC
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ssl_rc4_info_create(void)
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{
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return g_malloc(sizeof(RC4_KEY), 1);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_rc4_info_delete(void* rc4_info)
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{
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g_free(rc4_info);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_rc4_set_key(void* rc4_info, char* key, int len)
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{
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RC4_set_key((RC4_KEY*)rc4_info, len, (unsigned char*)key);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_rc4_crypt(void* rc4_info, char* data, int len)
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{
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RC4((RC4_KEY*)rc4_info, len, (unsigned char*)data, (unsigned char*)data);
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}
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/* sha1 stuff */
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/*****************************************************************************/
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void* APP_CC
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ssl_sha1_info_create(void)
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{
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return g_malloc(sizeof(SHA_CTX), 1);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_sha1_info_delete(void* sha1_info)
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{
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g_free(sha1_info);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_sha1_clear(void* sha1_info)
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{
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SHA1_Init((SHA_CTX*)sha1_info);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_sha1_transform(void* sha1_info, char* data, int len)
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{
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SHA1_Update((SHA_CTX*)sha1_info, data, len);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_sha1_complete(void* sha1_info, char* data)
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{
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SHA1_Final((unsigned char*)data, (SHA_CTX*)sha1_info);
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}
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/* md5 stuff */
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/*****************************************************************************/
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void* APP_CC
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ssl_md5_info_create(void)
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{
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return g_malloc(sizeof(MD5_CTX), 1);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_md5_info_delete(void* md5_info)
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{
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g_free(md5_info);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_md5_clear(void* md5_info)
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{
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MD5_Init((MD5_CTX*)md5_info);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_md5_transform(void* md5_info, char* data, int len)
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{
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MD5_Update((MD5_CTX*)md5_info, data, len);
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}
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/*****************************************************************************/
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void APP_CC
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ssl_md5_complete(void* md5_info, char* data)
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{
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MD5_Final((unsigned char*)data, (MD5_CTX*)md5_info);
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}
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/*****************************************************************************/
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static void APP_CC
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ssl_reverse_it(char* p, int len)
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{
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int i;
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int j;
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char temp;
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i = 0;
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j = len - 1;
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while (i < j)
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{
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temp = p[i];
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p[i] = p[j];
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p[j] = temp;
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i++;
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j--;
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}
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}
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/*****************************************************************************/
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int APP_CC
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ssl_mod_exp(char* out, int out_len, char* in, int in_len,
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char* mod, int mod_len, char* exp, int exp_len)
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{
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BN_CTX* ctx;
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BIGNUM lmod;
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BIGNUM lexp;
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BIGNUM lin;
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BIGNUM lout;
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int rv;
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char* l_out;
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char* l_in;
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char* l_mod;
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char* l_exp;
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l_out = (char*)g_malloc(out_len, 1);
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l_in = (char*)g_malloc(in_len, 1);
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l_mod = (char*)g_malloc(mod_len, 1);
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l_exp = (char*)g_malloc(exp_len, 1);
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g_memcpy(l_in, in, in_len);
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g_memcpy(l_mod, mod, mod_len);
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g_memcpy(l_exp, exp, exp_len);
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ssl_reverse_it(l_in, in_len);
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ssl_reverse_it(l_mod, mod_len);
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ssl_reverse_it(l_exp, exp_len);
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ctx = BN_CTX_new();
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BN_init(&lmod);
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BN_init(&lexp);
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BN_init(&lin);
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BN_init(&lout);
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BN_bin2bn((unsigned char*)l_mod, mod_len, &lmod);
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BN_bin2bn((unsigned char*)l_exp, exp_len, &lexp);
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BN_bin2bn((unsigned char*)l_in, in_len, &lin);
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BN_mod_exp(&lout, &lin, &lexp, &lmod, ctx);
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rv = BN_bn2bin(&lout, (unsigned char*)l_out);
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if (rv <= out_len)
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{
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ssl_reverse_it(l_out, rv);
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g_memcpy(out, l_out, out_len);
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}
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else
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{
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rv = 0;
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}
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BN_free(&lin);
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BN_free(&lout);
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BN_free(&lexp);
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BN_free(&lmod);
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BN_CTX_free(ctx);
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g_free(l_out);
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g_free(l_in);
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g_free(l_mod);
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g_free(l_exp);
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return rv;
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}
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/*****************************************************************************/
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/* returns error
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generates a new rsa key
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exp is passed in and mod and pri are passed out */
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int APP_CC
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ssl_gen_key_xrdp1(int key_size_in_bits, char* exp, int exp_len,
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char* mod, int mod_len, char* pri, int pri_len)
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{
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BIGNUM* my_e;
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RSA* my_key;
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char* lexp;
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char* lmod;
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char* lpri;
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int error;
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int len;
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if ((exp_len != 4) || (mod_len != 64) || (pri_len != 64))
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{
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return 1;
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}
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lexp = (char*)g_malloc(exp_len, 0);
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lmod = (char*)g_malloc(mod_len, 0);
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lpri = (char*)g_malloc(pri_len, 0);
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g_memcpy(lexp, exp, exp_len);
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ssl_reverse_it(lexp, exp_len);
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my_e = BN_new();
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BN_bin2bn((unsigned char*)lexp, exp_len, my_e);
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my_key = RSA_new();
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#if defined(OLD_RSA_GEN1)
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g_writeln("openssl library old, RSA_generate_key_ex not right");
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error = 1;
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#else
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error = RSA_generate_key_ex(my_key, key_size_in_bits, my_e, 0) == 0;
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#endif
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if (error == 0)
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{
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len = BN_num_bytes(my_key->n);
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error = len != mod_len;
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}
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if (error == 0)
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{
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BN_bn2bin(my_key->n, (unsigned char*)lmod);
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ssl_reverse_it(lmod, mod_len);
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}
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if (error == 0)
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{
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len = BN_num_bytes(my_key->d);
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error = len != pri_len;
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}
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if (error == 0)
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{
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BN_bn2bin(my_key->d, (unsigned char*)lpri);
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ssl_reverse_it(lpri, pri_len);
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}
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if (error == 0)
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{
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g_memcpy(mod, lmod, mod_len);
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g_memcpy(pri, lpri, pri_len);
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}
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BN_free(my_e);
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RSA_free(my_key);
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g_free(lexp);
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g_free(lmod);
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g_free(lpri);
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return error;
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}
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