gpgsm: Allow cipher mode as part of the algo for --cipher-algo.
047d699aa40c
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Description

gpgsm: Allow cipher mode as part of the algo for --cipher-algo.

* common/miscellaneous.c (gnupg_cipher_mode_name): New.
* common/audit.c (proc_type_encrypt): Print the encryption mode.
* sm/misc.c (gpgsm_map_cipher_name_to_oid): New.
* sm/gpgsm.c (DEFAULT_CIPHER_ALGO): Change to AES256-CBC for
consistent error messages.
(main): Replace the alias name mapping using if-else by a call to the
new function.
* g10/misc.c (openpgp_aead_algo_name): Use gnupg_cipher_mode_name for
consistency.

Note that DEFAULT_CIPHER_ALGO may now also be used to make GCM the
default.

Take care: This is the first patch to implement GCM encryption. The
actual encryption part is not yet ready and instead a debug message
will be printed.