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gpg: Use the KEM API for ECC encryption.

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* g10/ecdh.c (gnupg_ecc_6637_kdf): New.
(pk_ecdh_encrypt_with_shared_point, gen_k): Remove.
(pk_ecdh_generate_ephemeral_key): Remove.
* g10/pkglue.c (get_data_from_sexp): Remove.
(do_encrypt_ecdh): Use gcry_kem_encap of the KEM API,
gnupg_ecc_6637_kdf, and AESWRAP.
* g10/pkglue.h (gnupg_ecc_6637_kdf): New.
(pk_ecdh_encrypt_with_shared_point): Remove.
(pk_ecdh_generate_ephemeral_key, pk_ecdh_encrypt): Remove.

--

GnuPG-bug-id: 7649
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2025-05-19 14:51:17 +09:00
parent fcac10357e
commit d1c3bfda2a
No known key found for this signature in database
GPG key ID: 640114AF89DE6054
4 changed files with 358 additions and 264 deletions
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12
g10/pkglue.h
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@ -38,20 +38,12 @@ 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);
gpg_error_t pk_ecdh_generate_ephemeral_key (gcry_mpi_t *pkey, gcry_mpi_t *r_k);
gpg_error_t pk_ecdh_encrypt_with_shared_point
/* */ (const char *shared, size_t nshared,
const byte pk_fp[MAX_FINGERPRINT_LEN],
const byte *data, size_t ndata,
gcry_mpi_t *pkey,
gcry_mpi_t *out);
int pk_ecdh_encrypt (gcry_mpi_t *resarr, const byte pk_fp[MAX_FINGERPRINT_LEN],
gcry_mpi_t data, gcry_mpi_t * pkey);
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);
#endif /*GNUPG_G10_PKGLUE_H*/