static void SCT_signature_algorithms_print(const SCT *sct, BIO *out)
{
int nid = SCT_get_signature_nid(sct);
if (nid == NID_undef)
BIO_printf(out, "%02X%02X", sct->hash_alg, sct->sig_alg);
else
BIO_printf(out, "%s", OBJ_nid2ln(nid));
}
int o2i_SCT_signature(SCT *sct, const unsigned char **in, size_t len)
{
size_t siglen;
size_t len_remaining = len;
const unsigned char *p;
if (sct->version != SCT_VERSION_V1) {
CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_UNSUPPORTED_VERSION);
return -1;
}
/*
* digitally-signed struct header: (1 byte) Hash algorithm (1 byte)
* Signature algorithm (2 bytes + ?) Signature
*
* This explicitly rejects empty signatures: they're invalid for
* all supported algorithms.
*/
if (len <= 4) {
CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
return -1;
}
p = *in;
/* Get hash and signature algorithm */
sct->hash_alg = *p++;
sct->sig_alg = *p++;
if (SCT_get_signature_nid(sct) == NID_undef) {
CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
return -1;
}
/* Retrieve signature and check it is consistent with the buffer length */
n2s(p, siglen);
len_remaining -= (p - *in);
if (siglen > len_remaining) {
CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
return -1;
}
if (SCT_set1_signature(sct, p, siglen) != 1)
return -1;
len_remaining -= siglen;
*in = p + siglen;
return len - len_remaining;
}
int SCT_signature_is_complete(const SCT *sct)
{
return SCT_get_signature_nid(sct) != NID_undef &&
sct->sig != NULL && sct->sig_len > 0;
}
