* cipher/pubkey.c (_gcry_pk_sign_md, _gcry_pk_verify_md): New.
(_gcry_pk_random_override_new): New.
(_gcry_pk_get_random_override): New.
* src/gcrypt-int.h: Add those routines.
* src/context.h (CONTEXT_TYPE_RANDOM_OVERRIDE): New.
* src/context.c (_gcry_ctx_alloc, _gcry_ctx_release): Handle
CONTEXT_TYPE_RANDOM_OVERRIDE.
* src/gcrypt.h.in (gcry_error_t gcry_pk_hash_sign): New.
(gcry_error_t gcry_pk_hash_verify): New.
(gcry_pk_random_override_new): New.
* src/libgcrypt.def, src/libgcrypt.vers: Update.
* src/visibility.c (gcry_pk_hash_sign, gcry_pk_hash_verify): New.
(gcry_pk_random_override_new): New.
* src/visibility.h: Add those routines.