diff options
Diffstat (limited to 'dss.c')
| -rw-r--r-- | dss.c | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -174,6 +174,13 @@ int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf) { goto out; } +#if DEBUG_DSS_VERIFY + printmpint("dss verify p", key->p); + printmpint("dss verify q", key->q); + printmpint("dss verify g", key->g); + printmpint("dss verify x", key->x); +#endif + /* hash the data */ sha1_init(&hs); sha1_process(&hs, data_buf->data, data_buf->len); @@ -183,6 +190,9 @@ int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf) { /* w = (s')-1 mod q */ /* let val1 = s' */ bytes_to_mp(&val1, (const unsigned char*) &string[SHA1_HASH_SIZE], SHA1_HASH_SIZE); +#if DEBUG_DSS_VERIFY + printmpint("dss verify s'", &val1); +#endif if (mp_cmp(&val1, key->q) != MP_LT) { TRACE(("verify failed, s' >= q")) @@ -200,6 +210,9 @@ int buf_dss_verify(buffer* buf, dropbear_dss_key *key, buffer *data_buf) { /* u1 = ((SHA(M')w) mod q */ /* let val1 = SHA(M') = msghash */ bytes_to_mp(&val1, msghash, SHA1_HASH_SIZE); +#if DEBUG_DSS_VERIFY + printmpint("dss verify r'", &val1); +#endif /* let val3 = u1 = ((SHA(M')w) mod q */ if (mp_mulmod(&val1, &val2, key->q, &val3) != MP_OKAY) { |