crypto: x86/camellia - remove LRW algorithm

The LRW template now wraps an ECB mode algorithm rather than the block
cipher directly.  Therefore it is now redundant for crypto modules to
wrap their ECB code with generic LRW code themselves via lrw_crypt().

Remove the lrw-camellia-asm algorithm which did this.  Users who request
lrw(camellia) and previously would have gotten lrw-camellia-asm will now
get lrw(ecb-camellia-asm) instead, which is just as fast.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/arch/x86/crypto/camellia_glue.c b/arch/x86/crypto/camellia_glue.c
index af4840a..9ae2af2 100644 (file)
--- a/arch/x86/crypto/camellia_glue.c
+++ b/arch/x86/crypto/camellia_glue.c
@@ -30,7 +30,6 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <crypto/algapi.h>
-#include <crypto/lrw.h>
 #include <crypto/xts.h>
 #include <asm/crypto/camellia.h>
 #include <asm/crypto/glue_helper.h>
@@ -1437,65 +1436,6 @@ static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
                camellia_dec_blk(ctx, srcdst, srcdst);
 }
 
-int lrw_camellia_setkey(struct crypto_tfm *tfm, const u8 *key,
-                       unsigned int keylen)
-{
-       struct camellia_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
-       int err;
-
-       err = __camellia_setkey(&ctx->camellia_ctx, key,
-                               keylen - CAMELLIA_BLOCK_SIZE,
-                               &tfm->crt_flags);
-       if (err)
-               return err;
-
-       return lrw_init_table(&ctx->lrw_table,
-                             key + keylen - CAMELLIA_BLOCK_SIZE);
-}
-EXPORT_SYMBOL_GPL(lrw_camellia_setkey);
-
-static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-                      struct scatterlist *src, unsigned int nbytes)
-{
-       struct camellia_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
-       be128 buf[2 * 4];
-       struct lrw_crypt_req req = {
-               .tbuf = buf,
-               .tbuflen = sizeof(buf),
-
-               .table_ctx = &ctx->lrw_table,
-               .crypt_ctx = &ctx->camellia_ctx,
-               .crypt_fn = encrypt_callback,
-       };
-
-       return lrw_crypt(desc, dst, src, nbytes, &req);
-}
-
-static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-                      struct scatterlist *src, unsigned int nbytes)
-{
-       struct camellia_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
-       be128 buf[2 * 4];
-       struct lrw_crypt_req req = {
-               .tbuf = buf,
-               .tbuflen = sizeof(buf),
-
-               .table_ctx = &ctx->lrw_table,
-               .crypt_ctx = &ctx->camellia_ctx,
-               .crypt_fn = decrypt_callback,
-       };
-
-       return lrw_crypt(desc, dst, src, nbytes, &req);
-}
-
-void lrw_camellia_exit_tfm(struct crypto_tfm *tfm)
-{
-       struct camellia_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
-
-       lrw_free_table(&ctx->lrw_table);
-}
-EXPORT_SYMBOL_GPL(lrw_camellia_exit_tfm);
-
 int xts_camellia_setkey(struct crypto_tfm *tfm, const u8 *key,
                        unsigned int keylen)
 {
@@ -1554,7 +1494,7 @@ static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
        return xts_crypt(desc, dst, src, nbytes, &req);
 }
 
-static struct crypto_alg camellia_algs[6] = { {
+static struct crypto_alg camellia_algs[] = { {
        .cra_name               = "camellia",
        .cra_driver_name        = "camellia-asm",
        .cra_priority           = 200,
@@ -1632,29 +1572,6 @@ static struct crypto_alg camellia_algs[6] = { {
                },
        },
 }, {
-       .cra_name               = "lrw(camellia)",
-       .cra_driver_name        = "lrw-camellia-asm",
-       .cra_priority           = 300,
-       .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
-       .cra_blocksize          = CAMELLIA_BLOCK_SIZE,
-       .cra_ctxsize            = sizeof(struct camellia_lrw_ctx),
-       .cra_alignmask          = 0,
-       .cra_type               = &crypto_blkcipher_type,
-       .cra_module             = THIS_MODULE,
-       .cra_exit               = lrw_camellia_exit_tfm,
-       .cra_u = {
-               .blkcipher = {
-                       .min_keysize    = CAMELLIA_MIN_KEY_SIZE +
-                                               CAMELLIA_BLOCK_SIZE,
-                       .max_keysize    = CAMELLIA_MAX_KEY_SIZE +
-                                               CAMELLIA_BLOCK_SIZE,
-                       .ivsize         = CAMELLIA_BLOCK_SIZE,
-                       .setkey         = lrw_camellia_setkey,
-                       .encrypt        = lrw_encrypt,
-                       .decrypt        = lrw_decrypt,
-               },
-       },
-}, {
        .cra_name               = "xts(camellia)",
        .cra_driver_name        = "xts-camellia-asm",
        .cra_priority           = 300,

diff --git a/arch/x86/include/asm/crypto/camellia.h b/arch/x86/include/asm/crypto/camellia.h
index 24eff92..08d7144 100644 (file)
--- a/arch/x86/include/asm/crypto/camellia.h
+++ b/arch/x86/include/asm/crypto/camellia.h
@@ -2,7 +2,6 @@
 #ifndef ASM_X86_CAMELLIA_H
 #define ASM_X86_CAMELLIA_H
 
-#include <crypto/lrw.h>
 #include <linux/kernel.h>
 #include <linux/crypto.h>
 
@@ -17,11 +16,6 @@ struct camellia_ctx {
        u32 key_length;
 };
 
-struct camellia_lrw_ctx {
-       struct lrw_table_ctx lrw_table;
-       struct camellia_ctx camellia_ctx;
-};
-
 struct camellia_xts_ctx {
        struct camellia_ctx tweak_ctx;
        struct camellia_ctx crypt_ctx;
@@ -31,10 +25,6 @@ extern int __camellia_setkey(struct camellia_ctx *cctx,
                             const unsigned char *key,
                             unsigned int key_len, u32 *flags);
 
-extern int lrw_camellia_setkey(struct crypto_tfm *tfm, const u8 *key,
-                              unsigned int keylen);
-extern void lrw_camellia_exit_tfm(struct crypto_tfm *tfm);
-
 extern int xts_camellia_setkey(struct crypto_tfm *tfm, const u8 *key,
                               unsigned int keylen);
 

diff --git a/crypto/Kconfig b/crypto/Kconfig
index b4f5207..d2e8fac 100644 (file)
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1147,7 +1147,6 @@ config CRYPTO_CAMELLIA_X86_64
        depends on CRYPTO
        select CRYPTO_ALGAPI
        select CRYPTO_GLUE_HELPER_X86
-       select CRYPTO_LRW
        select CRYPTO_XTS
        help
          Camellia cipher algorithm module (x86_64).