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gpg: Some support to allow Kyber decryption.

Browse source 
* g10/call-agent.c (agent_pkdecrypt): Support dual keygrips and switch
to KEM mode.
* g10/ecdh.c (pk_ecdh_decrypt): Add an extra length check.
* g10/keyid.c (do_hash_public_key): Fix Kyber fingerprint computation.

* g10/mainproc.c (release_list): Free all 4 data elements.
(proc_pubkey_enc): Copy all 4 data elements.
* g10/misc.c (openpgp_pk_test_algo2): Map Kyber to KEM.

* g10/parse-packet.c (parse_pubkeyenc): Fix Kyber parser.
* g10/pubkey-enc.c (get_session_key): Allow Kyber.
(get_it): Support Kyber.
--

GnuPG-bug-id: 6815
This commit is contained in:
Werner Koch 2024-04-09 11:00:35 +02:00
parent 1a37f0080b
commit 52c4b09080
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
7 changed files with 67 additions and 15 deletions
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17
g10/keyid.c
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@ -336,17 +336,24 @@ do_hash_public_key (gcry_md_hd_t md, PKT_public_key *pk, int use_v5)
{
/* Ugly: We need to re-construct the wire format of the
* key parameter. It would be easier to use a second
* second index for pp and nn which could bump
* independet of i. */
* index for pp and nn which we could bump independet of
* i. */
const char *p;
p = gcry_mpi_get_opaque (pk->pkey[i], &nbits);
pp[i] = xmalloc ((nbits+7)/8 + 1);
nn[i] = (nbits+7)/8;
pp[i] = xmalloc (4 + nn[i] + 1);
if (p)
memcpy (pp[i], p, (nbits+7)/8);
{
pp[i][0] = nn[i] >> 24;
pp[i][1] = nn[i] >> 16;
pp[i][2] = nn[i] >> 8;
pp[i][3] = nn[i];
memcpy (pp[i] + 4 , p, nn[i]);
nn[i] += 4;
}
else
pp[i] = NULL;
nn[i] = (nbits+7)/8;
n += nn[i];
}
else if (gcry_mpi_get_flag (pk->pkey[i], GCRYMPI_FLAG_OPAQUE))