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-rw-r--r--arch/x86/crypto/twofish_avx_glue.c25
-rw-r--r--arch/x86/crypto/twofish_glue_3way.c109
-rw-r--r--arch/x86/include/asm/crypto/twofish.h8
-rw-r--r--crypto/Kconfig1
4 files changed, 25 insertions, 118 deletions
diff --git a/arch/x86/crypto/twofish_avx_glue.c b/arch/x86/crypto/twofish_avx_glue.c
index 3358e23f9ffb..3750b2cd3019 100644
--- a/arch/x86/crypto/twofish_avx_glue.c
+++ b/arch/x86/crypto/twofish_avx_glue.c
@@ -79,6 +79,31 @@ static void twofish_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
GLUE_FUNC_CAST(twofish_dec_blk));
}
+struct twofish_xts_ctx {
+ struct twofish_ctx tweak_ctx;
+ struct twofish_ctx crypt_ctx;
+};
+
+static int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct twofish_xts_ctx *ctx = crypto_tfm_ctx(tfm);
+ u32 *flags = &tfm->crt_flags;
+ int err;
+
+ err = xts_check_key(tfm, key, keylen);
+ if (err)
+ return err;
+
+ /* first half of xts-key is for crypt */
+ err = __twofish_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
+ if (err)
+ return err;
+
+ /* second half of xts-key is for tweak */
+ return __twofish_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
+ flags);
+}
static const struct common_glue_ctx twofish_enc = {
.num_funcs = 3,
diff --git a/arch/x86/crypto/twofish_glue_3way.c b/arch/x86/crypto/twofish_glue_3way.c
index 2d6dc5d7f0aa..bdbd2f6ab9d7 100644
--- a/arch/x86/crypto/twofish_glue_3way.c
+++ b/arch/x86/crypto/twofish_glue_3way.c
@@ -30,7 +30,6 @@
#include <crypto/b128ops.h>
#include <asm/crypto/twofish.h>
#include <asm/crypto/glue_helper.h>
-#include <crypto/xts.h>
EXPORT_SYMBOL_GPL(__twofish_enc_blk_3way);
EXPORT_SYMBOL_GPL(twofish_dec_blk_3way);
@@ -182,94 +181,6 @@ static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
return glue_ctr_crypt_128bit(&twofish_ctr, desc, dst, src, nbytes);
}
-static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
-{
- const unsigned int bsize = TF_BLOCK_SIZE;
- struct twofish_ctx *ctx = priv;
- int i;
-
- if (nbytes == 3 * bsize) {
- twofish_enc_blk_3way(ctx, srcdst, srcdst);
- return;
- }
-
- for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
- twofish_enc_blk(ctx, srcdst, srcdst);
-}
-
-static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
-{
- const unsigned int bsize = TF_BLOCK_SIZE;
- struct twofish_ctx *ctx = priv;
- int i;
-
- if (nbytes == 3 * bsize) {
- twofish_dec_blk_3way(ctx, srcdst, srcdst);
- return;
- }
-
- for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
- twofish_dec_blk(ctx, srcdst, srcdst);
-}
-
-int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen)
-{
- struct twofish_xts_ctx *ctx = crypto_tfm_ctx(tfm);
- u32 *flags = &tfm->crt_flags;
- int err;
-
- err = xts_check_key(tfm, key, keylen);
- if (err)
- return err;
-
- /* first half of xts-key is for crypt */
- err = __twofish_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
- if (err)
- return err;
-
- /* second half of xts-key is for tweak */
- return __twofish_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
- flags);
-}
-EXPORT_SYMBOL_GPL(xts_twofish_setkey);
-
-static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
-{
- struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
- le128 buf[3];
- struct xts_crypt_req req = {
- .tbuf = buf,
- .tbuflen = sizeof(buf),
-
- .tweak_ctx = &ctx->tweak_ctx,
- .tweak_fn = XTS_TWEAK_CAST(twofish_enc_blk),
- .crypt_ctx = &ctx->crypt_ctx,
- .crypt_fn = encrypt_callback,
- };
-
- return xts_crypt(desc, dst, src, nbytes, &req);
-}
-
-static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
-{
- struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
- le128 buf[3];
- struct xts_crypt_req req = {
- .tbuf = buf,
- .tbuflen = sizeof(buf),
-
- .tweak_ctx = &ctx->tweak_ctx,
- .tweak_fn = XTS_TWEAK_CAST(twofish_enc_blk),
- .crypt_ctx = &ctx->crypt_ctx,
- .crypt_fn = decrypt_callback,
- };
-
- return xts_crypt(desc, dst, src, nbytes, &req);
-}
-
static struct crypto_alg tf_algs[] = { {
.cra_name = "ecb(twofish)",
.cra_driver_name = "ecb-twofish-3way",
@@ -329,26 +240,6 @@ static struct crypto_alg tf_algs[] = { {
.decrypt = ctr_crypt,
},
},
-}, {
- .cra_name = "xts(twofish)",
- .cra_driver_name = "xts-twofish-3way",
- .cra_priority = 300,
- .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
- .cra_blocksize = TF_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct twofish_xts_ctx),
- .cra_alignmask = 0,
- .cra_type = &crypto_blkcipher_type,
- .cra_module = THIS_MODULE,
- .cra_u = {
- .blkcipher = {
- .min_keysize = TF_MIN_KEY_SIZE * 2,
- .max_keysize = TF_MAX_KEY_SIZE * 2,
- .ivsize = TF_BLOCK_SIZE,
- .setkey = xts_twofish_setkey,
- .encrypt = xts_encrypt,
- .decrypt = xts_decrypt,
- },
- },
} };
static bool is_blacklisted_cpu(void)
diff --git a/arch/x86/include/asm/crypto/twofish.h b/arch/x86/include/asm/crypto/twofish.h
index 3c904116ee00..f618bf272b90 100644
--- a/arch/x86/include/asm/crypto/twofish.h
+++ b/arch/x86/include/asm/crypto/twofish.h
@@ -6,11 +6,6 @@
#include <crypto/twofish.h>
#include <crypto/b128ops.h>
-struct twofish_xts_ctx {
- struct twofish_ctx tweak_ctx;
- struct twofish_ctx crypt_ctx;
-};
-
/* regular block cipher functions from twofish_x86_64 module */
asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
const u8 *src);
@@ -30,7 +25,4 @@ extern void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src,
extern void twofish_enc_blk_ctr_3way(void *ctx, u128 *dst, const u128 *src,
le128 *iv);
-extern int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen);
-
#endif /* ASM_X86_TWOFISH_H */
diff --git a/crypto/Kconfig b/crypto/Kconfig
index eba78fa85147..6a18aa26bbc7 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1584,7 +1584,6 @@ config CRYPTO_TWOFISH_X86_64_3WAY
select CRYPTO_TWOFISH_COMMON
select CRYPTO_TWOFISH_X86_64
select CRYPTO_GLUE_HELPER_X86
- select CRYPTO_XTS
help
Twofish cipher algorithm (x86_64, 3-way parallel).