Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (54 commits)
  crypto: gf128mul - remove leftover "(EXPERIMENTAL)" in Kconfig
  crypto: serpent-sse2 - remove unneeded LRW/XTS #ifdefs
  crypto: serpent-sse2 - select LRW and XTS
  crypto: twofish-x86_64-3way - remove unneeded LRW/XTS #ifdefs
  crypto: twofish-x86_64-3way - select LRW and XTS
  crypto: xts - remove dependency on EXPERIMENTAL
  crypto: lrw - remove dependency on EXPERIMENTAL
  crypto: picoxcell - fix boolean and / or confusion
  crypto: caam - remove DECO access initialization code
  crypto: caam - fix polarity of "propagate error" logic
  crypto: caam - more desc.h cleanups
  crypto: caam - desc.h - convert spaces to tabs
  crypto: talitos - convert talitos_error to struct device
  crypto: talitos - remove NO_IRQ references
  crypto: talitos - fix bad kfree
  crypto: convert drivers/crypto/* to use module_platform_driver()
  char: hw_random: convert drivers/char/hw_random/* to use module_platform_driver()
  crypto: serpent-sse2 - should select CRYPTO_CRYPTD
  crypto: serpent - rename serpent.c to serpent_generic.c
  crypto: serpent - cleanup checkpatch errors and warnings
  ...

1 files changed, 122 insertions, 34 deletions

diff --git a/crypto/lrw.c b/crypto/lrw.c
index 358f80b..ba42acc 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -3,7 +3,7 @@
  *
  * Copyright (c) 2006 Rik Snel <rsnel@cube.dyndns.org>
  *
- * Based om ecb.c
+ * Based on ecb.c
  * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -16,6 +16,7 @@
  * http://www.mail-archive.com/stds-p1619@listserv.ieee.org/msg00173.html
  *
  * The test vectors are included in the testing module tcrypt.[ch] */
+
 #include <crypto/algapi.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -26,21 +27,11 @@
 
 #include <crypto/b128ops.h>
 #include <crypto/gf128mul.h>
+#include <crypto/lrw.h>
 
 struct priv {
 	struct crypto_cipher *child;
-	/* optimizes multiplying a random (non incrementing, as at the
-	 * start of a new sector) value with key2, we could also have
-	 * used 4k optimization tables or no optimization at all. In the
-	 * latter case we would have to store key2 here */
-	struct gf128mul_64k *table;
-	/* stores:
-	 *  key2*{ 0,0,...0,0,0,0,1 }, key2*{ 0,0,...0,0,0,1,1 },
-	 *  key2*{ 0,0,...0,0,1,1,1 }, key2*{ 0,0,...0,1,1,1,1 }
-	 *  key2*{ 0,0,...1,1,1,1,1 }, etc
-	 * needed for optimized multiplication of incrementing values
-	 * with key2 */
-	be128 mulinc[128];
+	struct lrw_table_ctx table;
 };
 
 static inline void setbit128_bbe(void *b, int bit)
@@ -54,28 +45,16 @@ static inline void setbit128_bbe(void *b, int bit)
 			), b);
 }
 
-static int setkey(struct crypto_tfm *parent, const u8 *key,
-		  unsigned int keylen)
+int lrw_init_table(struct lrw_table_ctx *ctx, const u8 *tweak)
 {
-	struct priv *ctx = crypto_tfm_ctx(parent);
-	struct crypto_cipher *child = ctx->child;
-	int err, i;
 	be128 tmp = { 0 };
-	int bsize = crypto_cipher_blocksize(child);
-
-	crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
-	crypto_cipher_set_flags(child, crypto_tfm_get_flags(parent) &
-				       CRYPTO_TFM_REQ_MASK);
-	if ((err = crypto_cipher_setkey(child, key, keylen - bsize)))
-		return err;
-	crypto_tfm_set_flags(parent, crypto_cipher_get_flags(child) &
-				     CRYPTO_TFM_RES_MASK);
+	int i;
 
 	if (ctx->table)
 		gf128mul_free_64k(ctx->table);
 
 	/* initialize multiplication table for Key2 */
-	ctx->table = gf128mul_init_64k_bbe((be128 *)(key + keylen - bsize));
+	ctx->table = gf128mul_init_64k_bbe((be128 *)tweak);
 	if (!ctx->table)
 		return -ENOMEM;
 
@@ -88,6 +67,34 @@ static int setkey(struct crypto_tfm *parent, const u8 *key,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(lrw_init_table);
+
+void lrw_free_table(struct lrw_table_ctx *ctx)
+{
+	if (ctx->table)
+		gf128mul_free_64k(ctx->table);
+}
+EXPORT_SYMBOL_GPL(lrw_free_table);
+
+static int setkey(struct crypto_tfm *parent, const u8 *key,
+		  unsigned int keylen)
+{
+	struct priv *ctx = crypto_tfm_ctx(parent);
+	struct crypto_cipher *child = ctx->child;
+	int err, bsize = LRW_BLOCK_SIZE;
+	const u8 *tweak = key + keylen - bsize;
+
+	crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
+	crypto_cipher_set_flags(child, crypto_tfm_get_flags(parent) &
+				       CRYPTO_TFM_REQ_MASK);
+	err = crypto_cipher_setkey(child, key, keylen - bsize);
+	if (err)
+		return err;
+	crypto_tfm_set_flags(parent, crypto_cipher_get_flags(child) &
+				     CRYPTO_TFM_RES_MASK);
+
+	return lrw_init_table(&ctx->table, tweak);
+}
 
 struct sinfo {
 	be128 t;
@@ -134,7 +141,7 @@ static int crypt(struct blkcipher_desc *d,
 {
 	int err;
 	unsigned int avail;
-	const int bs = crypto_cipher_blocksize(ctx->child);
+	const int bs = LRW_BLOCK_SIZE;
 	struct sinfo s = {
 		.tfm = crypto_cipher_tfm(ctx->child),
 		.fn = fn
@@ -155,7 +162,7 @@ static int crypt(struct blkcipher_desc *d,
 	s.t = *iv;
 
 	/* T <- I*Key2 */
-	gf128mul_64k_bbe(&s.t, ctx->table);
+	gf128mul_64k_bbe(&s.t, ctx->table.table);
 
 	goto first;
 
@@ -163,7 +170,8 @@ static int crypt(struct blkcipher_desc *d,
 		do {
 			/* T <- I*Key2, using the optimization
 			 * discussed in the specification */
-			be128_xor(&s.t, &s.t, &ctx->mulinc[get_index128(iv)]);
+			be128_xor(&s.t, &s.t,
+				  &ctx->table.mulinc[get_index128(iv)]);
 			inc(iv);
 
 first:
@@ -206,6 +214,85 @@ static int decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 		     crypto_cipher_alg(ctx->child)->cia_decrypt);
 }
 
+int lrw_crypt(struct blkcipher_desc *desc, struct scatterlist *sdst,
+	      struct scatterlist *ssrc, unsigned int nbytes,
+	      struct lrw_crypt_req *req)
+{
+	const unsigned int bsize = LRW_BLOCK_SIZE;
+	const unsigned int max_blks = req->tbuflen / bsize;
+	struct lrw_table_ctx *ctx = req->table_ctx;
+	struct blkcipher_walk walk;
+	unsigned int nblocks;
+	be128 *iv, *src, *dst, *t;
+	be128 *t_buf = req->tbuf;
+	int err, i;
+
+	BUG_ON(max_blks < 1);
+
+	blkcipher_walk_init(&walk, sdst, ssrc, nbytes);
+
+	err = blkcipher_walk_virt(desc, &walk);
+	nbytes = walk.nbytes;
+	if (!nbytes)
+		return err;
+
+	nblocks = min(walk.nbytes / bsize, max_blks);
+	src = (be128 *)walk.src.virt.addr;
+	dst = (be128 *)walk.dst.virt.addr;
+
+	/* calculate first value of T */
+	iv = (be128 *)walk.iv;
+	t_buf[0] = *iv;
+
+	/* T <- I*Key2 */
+	gf128mul_64k_bbe(&t_buf[0], ctx->table);
+
+	i = 0;
+	goto first;
+
+	for (;;) {
+		do {
+			for (i = 0; i < nblocks; i++) {
+				/* T <- I*Key2, using the optimization
+				 * discussed in the specification */
+				be128_xor(&t_buf[i], t,
+						&ctx->mulinc[get_index128(iv)]);
+				inc(iv);
+first:
+				t = &t_buf[i];
+
+				/* PP <- T xor P */
+				be128_xor(dst + i, t, src + i);
+			}
+
+			/* CC <- E(Key2,PP) */
+			req->crypt_fn(req->crypt_ctx, (u8 *)dst,
+				      nblocks * bsize);
+
+			/* C <- T xor CC */
+			for (i = 0; i < nblocks; i++)
+				be128_xor(dst + i, dst + i, &t_buf[i]);
+
+			src += nblocks;
+			dst += nblocks;
+			nbytes -= nblocks * bsize;
+			nblocks = min(nbytes / bsize, max_blks);
+		} while (nblocks > 0);
+
+		err = blkcipher_walk_done(desc, &walk, nbytes);
+		nbytes = walk.nbytes;
+		if (!nbytes)
+			break;
+
+		nblocks = min(nbytes / bsize, max_blks);
+		src = (be128 *)walk.src.virt.addr;
+		dst = (be128 *)walk.dst.virt.addr;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(lrw_crypt);
+
 static int init_tfm(struct crypto_tfm *tfm)
 {
 	struct crypto_cipher *cipher;
@@ -218,8 +305,9 @@ static int init_tfm(struct crypto_tfm *tfm)
 	if (IS_ERR(cipher))
 		return PTR_ERR(cipher);
 
-	if (crypto_cipher_blocksize(cipher) != 16) {
+	if (crypto_cipher_blocksize(cipher) != LRW_BLOCK_SIZE) {
 		*flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
+		crypto_free_cipher(cipher);
 		return -EINVAL;
 	}
 
@@ -230,8 +318,8 @@ static int init_tfm(struct crypto_tfm *tfm)
 static void exit_tfm(struct crypto_tfm *tfm)
 {
 	struct priv *ctx = crypto_tfm_ctx(tfm);
-	if (ctx->table)
-		gf128mul_free_64k(ctx->table);
+
+	lrw_free_table(&ctx->table);
 	crypto_free_cipher(ctx->child);
 }