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pki_crpypto: Fix ecdsa signature to blob.

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BUG: https://red.libssh.org/issues/118
This commit is contained in:
Andreas Schneider
2013-10-18 23:48:21 +02:00
parent 33890daf41
commit bd8ab422d0
1 changed files with 27 additions and 13 deletions
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40
src/pki_crypto.c
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@@ -1018,33 +1018,47 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
break;
case SSH_KEYTYPE_ECDSA:
#ifdef HAVE_OPENSSL_ECC
{
ssh_buffer b;
int rc;
b = ssh_buffer_new();
if (b == NULL) {
return NULL;
}
r = make_bignum_string(sig->ecdsa_sig->r);
if (r == NULL) {
ssh_buffer_free(b);
return NULL;
}
rc = buffer_add_ssh_string(b, r);
ssh_string_free(r);
if (rc < 0) {
ssh_buffer_free(b);
return NULL;
}
s = make_bignum_string(sig->ecdsa_sig->s);
if (s == NULL) {
ssh_string_free(r);
ssh_buffer_free(b);
return NULL;
}
rc = buffer_add_ssh_string(b, s);
ssh_string_free(s);
if (rc < 0) {
ssh_buffer_free(b);
return NULL;
}
memcpy(buffer,
((char *)ssh_string_data(r)) + ssh_string_len(r) - 20,
20);
memcpy(buffer + 20,
((char *)ssh_string_data(s)) + ssh_string_len(s) - 20,
20);
ssh_string_free(r);
ssh_string_free(s);
sig_blob = ssh_string_new(40);
sig_blob = ssh_string_new(buffer_get_rest_len(b));
if (sig_blob == NULL) {
return NULL;
}
ssh_string_fill(sig_blob, buffer, 40);
ssh_string_fill(sig_blob, buffer_get_rest(b), buffer_get_rest_len(b));
break;
}
#endif
case SSH_KEYTYPE_UNKNOWN:
ssh_pki_log("Unknown signature key type: %s", sig->type_c);