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gpg,agent: Clean up around using ECC KEM.

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* common/util.h (gnupg_ecc_kem_kdf): Change the last two args.
* common/kem.c (gnupg_ecc_kem_kdf): The last arguments are KDF_PARAMS
and its length.
* agent/pkdecrypt.c (composite_pgp_kem_decrypt): Follow the change.
* g10/pkglue.c (do_encrypt_kem): Follow the change.
* g10/ecdh.c (extract_secret_x, derive_kek): Remove.
(gnupg_ecc_6637_kdf): Remove.
(ecc_build_kdf_params): Rename from build_kdf_params, changing
arguments.
* g10/pkglue.c (do_encrypt_ecdh): Refactor by ecc_build_kdf_params and
gnupg_ecc_kem_kdf.
* g10/pkglue.h (pk_ecdh_decrypt, gnupg_ecc_6637_kdf): Remove.
(ecc_build_kdf_params): New.
* g10/pubkey-enc.c (ecdh_sexp_build): Use ecc_build_kdf_params.

--

GnuPG-bug-id: 7649
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2025-05-23 16:59:38 +09:00
parent 37bec0df7b
commit 681d754043
No known key found for this signature in database
GPG key ID: 640114AF89DE6054
7 changed files with 93 additions and 496 deletions
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10
g10/pkglue.h
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@ -38,12 +38,10 @@ int pk_check_secret_key (pubkey_algo_t algo, gcry_mpi_t *skey);
/*-- ecdh.c --*/
gcry_mpi_t pk_ecdh_default_params (unsigned int qbits);
int pk_ecdh_decrypt (gcry_mpi_t *result, const byte sk_fp[MAX_FINGERPRINT_LEN],
gcry_mpi_t data,
const byte *frame, size_t nframe,
gcry_mpi_t * skey);
gpg_error_t gnupg_ecc_6637_kdf (void *kek, size_t kek_len, int hashalgo,
const void *ecdh, size_t ecdh_len, PKT_public_key *pk);
gpg_error_t ecc_build_kdf_params (unsigned char **r_kdf_params, size_t *r_len,
const unsigned char **r_kdf_params_spec,
gcry_mpi_t *pkey,
const byte fp[MAX_FINGERPRINT_LEN]);
#endif /*GNUPG_G10_PKGLUE_H*/