diff options
Diffstat (limited to 'rsa.c')
| -rw-r--r-- | rsa.c | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -205,6 +205,8 @@ int buf_rsa_verify(buffer * buf, rsa_key *key, const unsigned char* data, mp_int *rsa_em = NULL; int ret = DROPBEAR_FAILURE; + TRACE(("enter buf_rsa_verify")); + assert(key != NULL); m_mp_init_multi(&rsa_mdash, &rsa_s, NULL); @@ -217,6 +219,7 @@ int buf_rsa_verify(buffer * buf, rsa_key *key, const unsigned char* data, if (mp_read_unsigned_bin(&rsa_s, buf_getptr(buf, buf->len - buf->pos), buf->len - buf->pos) != MP_OKAY) { + TRACE(("failed reading rsa_s")); goto out; } @@ -230,17 +233,20 @@ int buf_rsa_verify(buffer * buf, rsa_key *key, const unsigned char* data, rsa_em = rsa_pad_em(key, data, len); if (mp_exptmod(&rsa_s, key->e, key->n, &rsa_mdash) != MP_OKAY) { + TRACE(("failed exptmod rsa_s")); goto out; } if (mp_cmp(rsa_em, &rsa_mdash) == MP_EQ) { /* signature is valid */ + TRACE(("success!")); ret = DROPBEAR_SUCCESS; } out: mp_clear_multi(rsa_em, &rsa_mdash, &rsa_s, NULL); m_free(rsa_em); + TRACE(("leave buf_rsa_verify: ret %d", ret)); return ret; } |