pk: Move RSA encoding functions to a new file.
* cipher/rsa-common: New. * cipher/pubkey.c (pkcs1_encode_for_encryption): Move to rsa-common.c and rename to _gcry_rsa_pkcs1_encode_for_enc. (pkcs1_decode_for_encryption): Move to rsa-common.c and rename to _gcry_rsa_pkcs1_decode_for_enc. (pkcs1_encode_for_signature): Move to rsa-common.c and rename to _gcry_rsa_pkcs1_encode_for_sig. (oaep_encode): Move to rsa-common.c and rename to _gcry_rsa_oaep_encode. (oaep_decode): Move to rsa-common.c and rename to _gcry_rsa_oaep_decode. (pss_encode): Move to rsa-common.c and rename to _gcry_rsa_pss_encode. (pss_verify): Move to rsa-common.c and rename to _gcry_rsa_pss_decode. (octet_string_from_mpi, mgf1): Move to rsa-common.c.
- Signed-off-by: Werner Koch <wk@gnupg.org>