TeaSpeak/tomcrypt
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

do dsa_int_validate_* in dsa_import

Browse Source
This commit is contained in:
Karel Miko 2017-09-14 17:38:12 +02:00
parent fd94e9540f
commit 444d9f3fb7
1 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/pk/dsa/dsa_import.c
View File

@ -24,7 +24,7 @@
*/
int dsa_import(const unsigned char *in, unsigned long inlen, dsa_key *key)
{
int err;
int err, stat;
unsigned long zero = 0;
unsigned char* tmpbuf = NULL;
unsigned char flags[1];
@ -116,10 +116,21 @@ int dsa_import(const unsigned char *in, unsigned long inlen, dsa_key *key)
}
LBL_OK:
key->qord = mp_unsigned_bin_size(key->q);
key->qord = mp_unsigned_bin_size(key->q);
if (key->qord >= LTC_MDSA_MAX_GROUP || key->qord <= 15 ||
(unsigned long)key->qord >= mp_unsigned_bin_size(key->p) || (mp_unsigned_bin_size(key->p) - key->qord) >= LTC_MDSA_DELTA) {
/* quick p, q, g validation, without primality testing */
if ((err = dsa_int_validate_pqg(key, &stat)) != CRYPT_OK) {
goto LBL_ERR;
}
if (stat == 0) {
err = CRYPT_INVALID_PACKET;
goto LBL_ERR;
}
/* validate x, y */
if ((err = dsa_int_validate_xy(key, &stat)) != CRYPT_OK) {
goto LBL_ERR;
}
if (stat == 0) {
err = CRYPT_INVALID_PACKET;
goto LBL_ERR;
}