crypto: x86/cast6-avx - convert to skcipher interface

Convert the AVX implementation of CAST6 from the (deprecated) ablkcipher
and blkcipher interfaces over to the skcipher interface.  Note that this
includes replacing the use of ablk_helper with crypto_simd.

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

2 files changed, 104 insertions, 216 deletions

diff --git a/arch/x86/crypto/cast6_avx_glue.c b/arch/x86/crypto/cast6_avx_glue.c
index d2fbf2be771e..9fb66b5e94b2 100644
--- a/arch/x86/crypto/cast6_avx_glue.c
+++ b/arch/x86/crypto/cast6_avx_glue.c
@@ -24,16 +24,12 @@
  */
 
 #include <linux/module.h>
-#include <linux/hardirq.h>
 #include <linux/types.h>
 #include <linux/crypto.h>
 #include <linux/err.h>
-#include <crypto/ablk_helper.h>
 #include <crypto/algapi.h>
 #include <crypto/cast6.h>
-#include <crypto/cryptd.h>
-#include <crypto/b128ops.h>
-#include <crypto/ctr.h>
+#include <crypto/internal/simd.h>
 #include <crypto/xts.h>
 #include <asm/crypto/glue_helper.h>
 
@@ -54,6 +50,12 @@ asmlinkage void cast6_xts_enc_8way(struct cast6_ctx *ctx, u8 *dst,
 asmlinkage void cast6_xts_dec_8way(struct cast6_ctx *ctx, u8 *dst,
 				   const u8 *src, le128 *iv);
 
+static int cast6_setkey_skcipher(struct crypto_skcipher *tfm,
+				 const u8 *key, unsigned int keylen)
+{
+	return cast6_setkey(&tfm->base, key, keylen);
+}
+
 static void cast6_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
 {
 	glue_xts_crypt_128bit_one(ctx, dst, src, iv,
@@ -155,36 +157,30 @@ static const struct common_glue_ctx cast6_dec_xts = {
 	} }
 };
 
-static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-		       struct scatterlist *src, unsigned int nbytes)
+static int ecb_encrypt(struct skcipher_request *req)
 {
-	return glue_ecb_crypt_128bit(&cast6_enc, desc, dst, src, nbytes);
+	return glue_ecb_req_128bit(&cast6_enc, req);
 }
 
-static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-		       struct scatterlist *src, unsigned int nbytes)
+static int ecb_decrypt(struct skcipher_request *req)
 {
-	return glue_ecb_crypt_128bit(&cast6_dec, desc, dst, src, nbytes);
+	return glue_ecb_req_128bit(&cast6_dec, req);
 }
 
-static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-		       struct scatterlist *src, unsigned int nbytes)
+static int cbc_encrypt(struct skcipher_request *req)
 {
-	return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__cast6_encrypt), desc,
-				       dst, src, nbytes);
+	return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(__cast6_encrypt),
+					   req);
 }
 
-static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-		       struct scatterlist *src, unsigned int nbytes)
+static int cbc_decrypt(struct skcipher_request *req)
 {
-	return glue_cbc_decrypt_128bit(&cast6_dec_cbc, desc, dst, src,
-				       nbytes);
+	return glue_cbc_decrypt_req_128bit(&cast6_dec_cbc, req);
 }
 
-static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-		     struct scatterlist *src, unsigned int nbytes)
+static int ctr_crypt(struct skcipher_request *req)
 {
-	return glue_ctr_crypt_128bit(&cast6_ctr, desc, dst, src, nbytes);
+	return glue_ctr_req_128bit(&cast6_ctr, req);
 }
 
 struct cast6_xts_ctx {
@@ -192,14 +188,14 @@ struct cast6_xts_ctx {
 	struct cast6_ctx crypt_ctx;
 };
 
-static int xts_cast6_setkey(struct crypto_tfm *tfm, const u8 *key,
-			      unsigned int keylen)
+static int xts_cast6_setkey(struct crypto_skcipher *tfm, const u8 *key,
+			    unsigned int keylen)
 {
-	struct cast6_xts_ctx *ctx = crypto_tfm_ctx(tfm);
-	u32 *flags = &tfm->crt_flags;
+	struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+	u32 *flags = &tfm->base.crt_flags;
 	int err;
 
-	err = xts_check_key(tfm, key, keylen);
+	err = xts_verify_key(tfm, key, keylen);
 	if (err)
 		return err;
 
@@ -213,197 +209,87 @@ static int xts_cast6_setkey(struct crypto_tfm *tfm, const u8 *key,
 			      flags);
 }
 
-static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-		       struct scatterlist *src, unsigned int nbytes)
+static int xts_encrypt(struct skcipher_request *req)
 {
-	struct cast6_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 
-	return glue_xts_crypt_128bit(&cast6_enc_xts, desc, dst, src, nbytes,
-				     XTS_TWEAK_CAST(__cast6_encrypt),
-				     &ctx->tweak_ctx, &ctx->crypt_ctx);
+	return glue_xts_req_128bit(&cast6_enc_xts, req,
+				   XTS_TWEAK_CAST(__cast6_encrypt),
+				   &ctx->tweak_ctx, &ctx->crypt_ctx);
 }
 
-static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
-		       struct scatterlist *src, unsigned int nbytes)
+static int xts_decrypt(struct skcipher_request *req)
 {
-	struct cast6_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 
-	return glue_xts_crypt_128bit(&cast6_dec_xts, desc, dst, src, nbytes,
-				     XTS_TWEAK_CAST(__cast6_encrypt),
-				     &ctx->tweak_ctx, &ctx->crypt_ctx);
+	return glue_xts_req_128bit(&cast6_dec_xts, req,
+				   XTS_TWEAK_CAST(__cast6_encrypt),
+				   &ctx->tweak_ctx, &ctx->crypt_ctx);
 }
 
-static struct crypto_alg cast6_algs[] = { {
-	.cra_name		= "__ecb-cast6-avx",
-	.cra_driver_name	= "__driver-ecb-cast6-avx",
-	.cra_priority		= 0,
-	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
-				  CRYPTO_ALG_INTERNAL,
-	.cra_blocksize		= CAST6_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct cast6_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_blkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_u = {
-		.blkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE,
-			.max_keysize	= CAST6_MAX_KEY_SIZE,
-			.setkey		= cast6_setkey,
-			.encrypt	= ecb_encrypt,
-			.decrypt	= ecb_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "__cbc-cast6-avx",
-	.cra_driver_name	= "__driver-cbc-cast6-avx",
-	.cra_priority		= 0,
-	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
-				  CRYPTO_ALG_INTERNAL,
-	.cra_blocksize		= CAST6_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct cast6_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_blkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_u = {
-		.blkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE,
-			.max_keysize	= CAST6_MAX_KEY_SIZE,
-			.setkey		= cast6_setkey,
-			.encrypt	= cbc_encrypt,
-			.decrypt	= cbc_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "__ctr-cast6-avx",
-	.cra_driver_name	= "__driver-ctr-cast6-avx",
-	.cra_priority		= 0,
-	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
-				  CRYPTO_ALG_INTERNAL,
-	.cra_blocksize		= 1,
-	.cra_ctxsize		= sizeof(struct cast6_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_blkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_u = {
-		.blkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE,
-			.max_keysize	= CAST6_MAX_KEY_SIZE,
-			.ivsize		= CAST6_BLOCK_SIZE,
-			.setkey		= cast6_setkey,
-			.encrypt	= ctr_crypt,
-			.decrypt	= ctr_crypt,
-		},
-	},
-}, {
-	.cra_name		= "__xts-cast6-avx",
-	.cra_driver_name	= "__driver-xts-cast6-avx",
-	.cra_priority		= 0,
-	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
-				  CRYPTO_ALG_INTERNAL,
-	.cra_blocksize		= CAST6_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct cast6_xts_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_blkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_u = {
-		.blkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE * 2,
-			.max_keysize	= CAST6_MAX_KEY_SIZE * 2,
-			.ivsize		= CAST6_BLOCK_SIZE,
-			.setkey		= xts_cast6_setkey,
-			.encrypt	= xts_encrypt,
-			.decrypt	= xts_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "ecb(cast6)",
-	.cra_driver_name	= "ecb-cast6-avx",
-	.cra_priority		= 200,
-	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
-	.cra_blocksize		= CAST6_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct async_helper_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_ablkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_init		= ablk_init,
-	.cra_exit		= ablk_exit,
-	.cra_u = {
-		.ablkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE,
-			.max_keysize	= CAST6_MAX_KEY_SIZE,
-			.setkey		= ablk_set_key,
-			.encrypt	= ablk_encrypt,
-			.decrypt	= ablk_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "cbc(cast6)",
-	.cra_driver_name	= "cbc-cast6-avx",
-	.cra_priority		= 200,
-	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
-	.cra_blocksize		= CAST6_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct async_helper_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_ablkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_init		= ablk_init,
-	.cra_exit		= ablk_exit,
-	.cra_u = {
-		.ablkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE,
-			.max_keysize	= CAST6_MAX_KEY_SIZE,
-			.ivsize		= CAST6_BLOCK_SIZE,
-			.setkey		= ablk_set_key,
-			.encrypt	= __ablk_encrypt,
-			.decrypt	= ablk_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "ctr(cast6)",
-	.cra_driver_name	= "ctr-cast6-avx",
-	.cra_priority		= 200,
-	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
-	.cra_blocksize		= 1,
-	.cra_ctxsize		= sizeof(struct async_helper_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_ablkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_init		= ablk_init,
-	.cra_exit		= ablk_exit,
-	.cra_u = {
-		.ablkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE,
-			.max_keysize	= CAST6_MAX_KEY_SIZE,
-			.ivsize		= CAST6_BLOCK_SIZE,
-			.setkey		= ablk_set_key,
-			.encrypt	= ablk_encrypt,
-			.decrypt	= ablk_encrypt,
-			.geniv		= "chainiv",
-		},
-	},
-}, {
-	.cra_name		= "xts(cast6)",
-	.cra_driver_name	= "xts-cast6-avx",
-	.cra_priority		= 200,
-	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
-	.cra_blocksize		= CAST6_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct async_helper_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_ablkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_init		= ablk_init,
-	.cra_exit		= ablk_exit,
-	.cra_u = {
-		.ablkcipher = {
-			.min_keysize	= CAST6_MIN_KEY_SIZE * 2,
-			.max_keysize	= CAST6_MAX_KEY_SIZE * 2,
-			.ivsize		= CAST6_BLOCK_SIZE,
-			.setkey		= ablk_set_key,
-			.encrypt	= ablk_encrypt,
-			.decrypt	= ablk_decrypt,
-		},
+static struct skcipher_alg cast6_algs[] = {
+	{
+		.base.cra_name		= "__ecb(cast6)",
+		.base.cra_driver_name	= "__ecb-cast6-avx",
+		.base.cra_priority	= 200,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= CAST6_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct cast6_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= CAST6_MIN_KEY_SIZE,
+		.max_keysize		= CAST6_MAX_KEY_SIZE,
+		.setkey			= cast6_setkey_skcipher,
+		.encrypt		= ecb_encrypt,
+		.decrypt		= ecb_decrypt,
+	}, {
+		.base.cra_name		= "__cbc(cast6)",
+		.base.cra_driver_name	= "__cbc-cast6-avx",
+		.base.cra_priority	= 200,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= CAST6_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct cast6_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= CAST6_MIN_KEY_SIZE,
+		.max_keysize		= CAST6_MAX_KEY_SIZE,
+		.ivsize			= CAST6_BLOCK_SIZE,
+		.setkey			= cast6_setkey_skcipher,
+		.encrypt		= cbc_encrypt,
+		.decrypt		= cbc_decrypt,
+	}, {
+		.base.cra_name		= "__ctr(cast6)",
+		.base.cra_driver_name	= "__ctr-cast6-avx",
+		.base.cra_priority	= 200,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= 1,
+		.base.cra_ctxsize	= sizeof(struct cast6_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= CAST6_MIN_KEY_SIZE,
+		.max_keysize		= CAST6_MAX_KEY_SIZE,
+		.ivsize			= CAST6_BLOCK_SIZE,
+		.chunksize		= CAST6_BLOCK_SIZE,
+		.setkey			= cast6_setkey_skcipher,
+		.encrypt		= ctr_crypt,
+		.decrypt		= ctr_crypt,
+	}, {
+		.base.cra_name		= "__xts(cast6)",
+		.base.cra_driver_name	= "__xts-cast6-avx",
+		.base.cra_priority	= 200,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= CAST6_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct cast6_xts_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= 2 * CAST6_MIN_KEY_SIZE,
+		.max_keysize		= 2 * CAST6_MAX_KEY_SIZE,
+		.ivsize			= CAST6_BLOCK_SIZE,
+		.setkey			= xts_cast6_setkey,
+		.encrypt		= xts_encrypt,
+		.decrypt		= xts_decrypt,
 	},
-} };
+};
+
+static struct simd_skcipher_alg *cast6_simd_algs[ARRAY_SIZE(cast6_algs)];
 
 static int __init cast6_init(void)
 {
@@ -415,12 +301,15 @@ static int __init cast6_init(void)
 		return -ENODEV;
 	}
 
-	return crypto_register_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
+	return simd_register_skciphers_compat(cast6_algs,
+					      ARRAY_SIZE(cast6_algs),
+					      cast6_simd_algs);
 }
 
 static void __exit cast6_exit(void)
 {
-	crypto_unregister_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
+	simd_unregister_skciphers(cast6_algs, ARRAY_SIZE(cast6_algs),
+				  cast6_simd_algs);
 }
 
 module_init(cast6_init);
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 1e5ee62a11f6..536a7fac205f 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1260,12 +1260,11 @@ config CRYPTO_CAST6
 config CRYPTO_CAST6_AVX_X86_64
 	tristate "CAST6 (CAST-256) cipher algorithm (x86_64/AVX)"
 	depends on X86 && 64BIT
-	select CRYPTO_ALGAPI
-	select CRYPTO_CRYPTD
-	select CRYPTO_ABLK_HELPER
-	select CRYPTO_GLUE_HELPER_X86
-	select CRYPTO_CAST_COMMON
+	select CRYPTO_BLKCIPHER
 	select CRYPTO_CAST6
+	select CRYPTO_CAST_COMMON
+	select CRYPTO_GLUE_HELPER_X86
+	select CRYPTO_SIMD
 	select CRYPTO_XTS
 	help
 	  The CAST6 encryption algorithm (synonymous with CAST-256) is