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agent:kem:ecc: Support a key on smartcard.

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* agent/agent.h (agent_card_ecc_kem): New.
* agent/divert-scd.c (agent_card_ecc_kem): New.
* agent/pkdecrypt.c (ecc_extract_pk_from_key): New.
(ecc_extract_sk_from_key): New.
(ecc_raw_kem, get_cardkey, ecc_get_curve): New.
(ecc_pgp_kem_decrypt): Support a key on smartcard for ECC.
(composite_pgp_kem_decrypt): Handle a case of a key on smartcard.
* common/sexputil.c (get_ecc_curve_from_key): New.
* common/util.h (get_ecc_curve_from_key): New.

--

GnuPG-bug-id: 7097
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2024-04-26 14:18:03 +09:00
parent 83e2dede0a
commit 9128d81bb7
No known key found for this signature in database
GPG key ID: 640114AF89DE6054
5 changed files with 288 additions and 74 deletions
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28
agent/divert-scd.c
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@ -486,6 +486,34 @@ divert_pkdecrypt (ctrl_t ctrl,
return rc;
}
gpg_error_t
agent_card_ecc_kem (ctrl_t ctrl, const unsigned char *ecc_ct,
size_t ecc_point_len, unsigned char *ecc_ecdh)
{
gpg_error_t err = 0;
char *ecdh = NULL;
size_t len;
int rc;
rc = agent_card_pkdecrypt (ctrl, ctrl->keygrip, getpin_cb, ctrl, NULL,
ecc_ct, ecc_point_len, &ecdh, &len, NULL);
if (rc)
return rc;
if (len != ecc_point_len)
{
if (opt.verbose)
log_info ("%s: ECC result length invalid (%zu != %zu)\n",
__func__, len, ecc_point_len);
return gpg_error (GPG_ERR_INV_DATA);
}
else
memcpy (ecc_ecdh, ecdh, len);
xfree (ecdh);
return err;
}
gpg_error_t
divert_writekey (ctrl_t ctrl, int force, const char *serialno,