diff options
| author | Joachim Fritschi <jfritschi@freenet.de> | 2006-06-20 20:37:23 +1000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2006-09-21 11:16:27 +1000 |
| commit | 2729bb427f686e47970406d6bde6b11892885f29 (patch) | |
| tree | 6c17bab6970fc4bcc92c0de76d174e35d8043844 /include/crypto | |
| parent | 799111020c66c41aef621a3b53ad112543754124 (diff) | |
[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 <jfritschi@freenet.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/twofish.h | 23 |
1 files changed, 23 insertions, 0 deletions
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 <linux/types.h> + +#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 |