From 2729bb427f686e47970406d6bde6b11892885f29 Mon Sep 17 00:00:00 2001 From: Joachim Fritschi Date: Tue, 20 Jun 2006 20:37:23 +1000 Subject: [CRYPTO] twofish: Split out common c code This patch splits up the twofish crypto routine into a common part ( key setup ) which will be uses by all twofish crypto modules ( generic-c , i586 assembler and x86_64 assembler ) and generic-c part. It also creates a new header file which will be used by all 3 modules. This eliminates all code duplication. Correctness was verified with the tcrypt module and automated test scripts. Signed-off-by: Joachim Fritschi Signed-off-by: Herbert Xu --- include/crypto/twofish.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 include/crypto/twofish.h (limited to 'include/crypto/twofish.h') diff --git a/include/crypto/twofish.h b/include/crypto/twofish.h new file mode 100644 index 000000000000..e4328cfaaf64 --- /dev/null +++ b/include/crypto/twofish.h @@ -0,0 +1,23 @@ +#ifndef _CRYPTO_TWOFISH_H +#define _CRYPTO_TWOFISH_H + +#include + +#define TF_MIN_KEY_SIZE 16 +#define TF_MAX_KEY_SIZE 32 +#define TF_BLOCK_SIZE 16 + +struct crypto_tfm; + +/* Structure for an expanded Twofish key. s contains the key-dependent + * S-boxes composed with the MDS matrix; w contains the eight "whitening" + * subkeys, K[0] through K[7]. k holds the remaining, "round" subkeys. Note + * that k[i] corresponds to what the Twofish paper calls K[i+8]. */ +struct twofish_ctx { + u32 s[4][256], w[8], k[32]; +}; + +int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, + unsigned int key_len, u32 *flags); + +#endif -- cgit v1.2.3