gpgsm: Use KEM API for decryption.
035d0dd4adf3
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Description

gpgsm: Use KEM API for decryption.

* sm/call-agent.c (gpgsm_agent_pkdecrypt): Add USE_KEM argument.
* sm/decrypt.c (ecdh_decrypt): Remove.
(determine_wrap_cipher, determine_hashalgo): New.
(build_shared_info, ecc_kem_pkdecrypt): New.
(prepare_decryption): Remove NBITS argument.
Call ecc_kem_pkdecrypt, when it's ECC.
(gpgsm_decrypt): Follow the removal of NBITS argument.
* sm/gpgsm.h (gpgsm_agent_pkdecrypt): Add USE_KEM argument.

GnuPG-bug-id: T7811
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>