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agent: Support ECC KEM by PKDECRYPT --kem.

Browse source 
* common/kem.c (gnupg_ecc_kem_kdf): Support traditional KDF of RFC
6637.
* common/util.h (gnupg_ecc_kem_kdf): Add FIXED_INFO argument.
* g10/pkglue.c (do_encrypt_kem): Follow the change.
* agent/pkdecrypt.c (ecc_pgp_kem_decap): Return ECC parameters.
(composite_pgp_kem_decrypt): Follow the changes.
(ecc_kem_decrypt): New.
(agent_kem_decrypt): Support ECC KEM.

--

GnuPG-bug-id: 7649
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2025-05-21 14:44:16 +09:00
parent 2bbcbbcbe8
commit 57a3d23925
No known key found for this signature in database
GPG key ID: 640114AF89DE6054
4 changed files with 248 additions and 61 deletions
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3
common/util.h
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@ -305,7 +305,8 @@ const char *gnupg_messages_locale_name (void);
gpg_error_t gnupg_ecc_kem_kdf (void *kek, size_t kek_len,
int hashalgo, const void *ecdh, size_t ecdh_len,
const void *ecc_ct, size_t ecc_ct_len,
const void *ecc_pk, size_t ecc_pk_len);
const void *ecc_pk, size_t ecc_pk_len,
gcry_buffer_t *fixed_info);
gpg_error_t gnupg_kem_combiner (void *kek, size_t kek_len,
const void *ecc_ss, size_t ecc_ss_len,