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gpg: Some support to allow Kyber decryption.

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* 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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12
g10/parse-packet.c
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@ -1444,6 +1444,7 @@ parse_symkeyenc (IOBUF inp, int pkttype, unsigned long pktlen,
}
/* Parse a public key encrypted packet (Tag 1). */
static int
parse_pubkeyenc (IOBUF inp, int pkttype, unsigned long pktlen,
PACKET * packet)
@ -1514,9 +1515,14 @@ parse_pubkeyenc (IOBUF inp, int pkttype, unsigned long pktlen,
{
log_assert (ndata == 4);
/* Get the ephemeral public key. */
rc = read_octet_string (inp, &pktlen, 4, 0, 0, k->data + 0);
if (rc)
goto leave;
n = pktlen;
k->data[0] = sos_read (inp, &n, 0);
pktlen -= n;
if (!k->data[0])
{
rc = gpg_error (GPG_ERR_INV_PACKET);
goto leave;
}
/* Get the Kyber ciphertext. */
rc = read_octet_string (inp, &pktlen, 4, 0, 0, k->data + 1);
if (rc)