jh163888/xrdp
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

moving reverse to ssl_calls

Browse Source
This commit is contained in:
jsorg71 2005-09-25 20:21:53 +00:00
parent e56bec1a7d
commit 9ad83a3c23
2 changed files with 55 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
common/ssl_calls.c
View File

@ -131,9 +131,30 @@ g_md5_complete(void* md5_info, char* data)
MD5_Final((unsigned char*)data, (MD5_CTX*)md5_info);
}
/*****************************************************************************/
static void
reverse_it(char* p, int len)
{
int i;
int j;
char temp;
i = 0;
j = len - 1;
while (i < j)
{
temp = p[i];
p[i] = p[j];
p[j] = temp;
i++;
j--;
}
}
/*****************************************************************************/
int
g_mod_exp(char* out, char* in, char* mod, char* exp)
g_mod_exp(char* out, int out_len, char* in, int in_len,
char* mod, int mod_len, char* exp, int exp_len)
{
BN_CTX* ctx;
BIGNUM lmod;
@ -141,21 +162,48 @@ g_mod_exp(char* out, char* in, char* mod, char* exp)
BIGNUM lin;
BIGNUM lout;
int rv;
char* l_out;
char* l_in;
char* l_mod;
char* l_exp;
l_out = (char*)g_malloc(out_len, 1);
l_in = (char*)g_malloc(in_len, 1);
l_mod = (char*)g_malloc(mod_len, 1);
l_exp = (char*)g_malloc(exp_len, 1);
g_memcpy(l_in, in, in_len);
g_memcpy(l_mod, mod, mod_len);
g_memcpy(l_exp, exp, exp_len);
reverse_it(l_in, in_len);
reverse_it(l_mod, mod_len);
reverse_it(l_exp, exp_len);
ctx = BN_CTX_new();
BN_init(&lmod);
BN_init(&lexp);
BN_init(&lin);
BN_init(&lout);
BN_bin2bn((unsigned char*)mod, 64, &lmod);
BN_bin2bn((unsigned char*)exp, 64, &lexp);
BN_bin2bn((unsigned char*)in, 64, &lin);
BN_bin2bn((unsigned char*)l_mod, 64, &lmod);
BN_bin2bn((unsigned char*)l_exp, 64, &lexp);
BN_bin2bn((unsigned char*)l_in, 64, &lin);
BN_mod_exp(&lout, &lin, &lexp, &lmod, ctx);
rv = BN_bn2bin(&lout, (unsigned char*)out);
rv = BN_bn2bin(&lout, (unsigned char*)l_out);
if (rv <= out_len)
{
reverse_it(l_out, rv);
g_memcpy(out, l_out, out_len);
}
else
{
rv = 0;
}
BN_free(&lin);
BN_free(&lout);
BN_free(&lexp);
BN_free(&lmod);
BN_CTX_free(ctx);
g_free(l_out);
g_free(l_in);
g_free(l_mod);
g_free(l_exp);
return rv;
}

3
common/ssl_calls.h
View File

@ -50,6 +50,7 @@ g_md5_transform(void* md5_info, char* data, int len);
void
g_md5_complete(void* md5_info, char* data);
int
g_mod_exp(char* out, char* in, char* mod, char* exp);
g_mod_exp(char* out, int out_len, char* in, int in_len,
char* mod, int mod_len, char* exp, int exp_len);
#endif