Support setting s-box for the ciphers that require it

* src/gcrypt.h.in (GCRYCTL_SET_SBOX, gcry_cipher_set_sbox): New.
* cipher/cipher.c (_gcry_cipher_ctl): pass GCRYCTL_SET_SBOX to
  set_extra_info callback.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/cipher/cipher.c b/cipher/cipher.c
index da590610..5c44c0d9 100644
--- a/cipher/cipher.c
+++ b/cipher/cipher.c
@@ -1264,6 +1264,13 @@ _gcry_cipher_ctl (gcry_cipher_hd_t h, int cmd, void *buffer, size_t buflen)
         }
       break;
 
+    case GCRYCTL_SET_SBOX:
+      if (h->spec->set_extra_info)
+        rc = h->spec->set_extra_info
+          (&h->context.c, GCRYCTL_SET_SBOX, buffer, buflen);
+      else
+        rc = GPG_ERR_NOT_SUPPORTED;
+
     default:
       rc = GPG_ERR_INV_OP;
     }