Add support for the IDEA cipher.

Adapt idea.c to the Libgcrypt framework.
Add IDEA to cipher_table and to the build system.

Patents on IDEA have expired:
  Europe: EP0482154 on 2011-05-16,
  Japan:  JP3225440 on 2011-05-16,
  U.S.:   5,214,703 on 2012-01-07.

* configure.ac: Add idea to the list of available ciphers.
Define USE_IDEA if idea is enabled.
* cipher/cipher.c (cipher_table): Add entry for IDEA.
* cipher/idea.c: Update comment about patents.
Include proper header files and remove redundant declarations.
(expand_key, cipher, do_setkey, encrypt_block, decrypt_block):
Define function arguments as const where appropriate.
(cipher): Test for !WORDS_BIGENDIAN instead of LITTLE_ENDIAN_HOST.
(do_setkey, decrypt_block): Don't call selftest.
(idea_setkey): New function, wrapper for do_setkey.
(idea_encrypt): New function, wrapper for encrypt_block.
(_gcry_cipher_spec_idea): Define.
* cipher/Makefile.am (EXTRA_libcipher_la_SOURCES): Add idea.c.
* src/cipher.h (_gcry_cipher_spec_idea): Declare.
* tests/basic.c (check_ciphers): Add GCRY_CIPHER_IDEA.

1 files changed, 4 insertions, 0 deletions

diff --git a/cipher/cipher.c b/cipher/cipher.c
index 589c262b..389bf7a6 100644
--- a/cipher/cipher.c
+++ b/cipher/cipher.c
@@ -100,6 +100,10 @@ static struct cipher_table_entry
     { &_gcry_cipher_spec_camellia256,
       &dummy_extra_spec,                  GCRY_CIPHER_CAMELLIA256 },
 #endif
+#ifdef USE_IDEA
+    { &_gcry_cipher_spec_idea,
+      &dummy_extra_spec,                  GCRY_CIPHER_IDEA },
+#endif
     { NULL                    }
   };