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authorJoachim Fritschi <jfritschi@freenet.de>2006-06-20 20:37:23 +1000
committerHerbert Xu <herbert@gondor.apana.org.au>2006-09-21 11:16:27 +1000
commit2729bb427f686e47970406d6bde6b11892885f29 (patch)
tree6c17bab6970fc4bcc92c0de76d174e35d8043844 /include/crypto
parent799111020c66c41aef621a3b53ad112543754124 (diff)
download96b-common-2729bb427f686e47970406d6bde6b11892885f29.tar.gz
[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.h23
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