crypto: x86/serpent-sse2 - convert to skcipher interface

Convert the SSE2 implementation of Serpent 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>

1 files changed, 70 insertions, 151 deletions

diff --git a/arch/x86/crypto/serpent_sse2_glue.c b/arch/x86/crypto/serpent_sse2_glue.c
index 9e2734384ce5..3dafe137596a 100644
--- a/arch/x86/crypto/serpent_sse2_glue.c
+++ b/arch/x86/crypto/serpent_sse2_glue.c
@@ -30,19 +30,22 @@
  */
 
 #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/serpent.h>
-#include <crypto/cryptd.h>
 #include <crypto/b128ops.h>
-#include <crypto/ctr.h>
+#include <crypto/internal/simd.h>
+#include <crypto/serpent.h>
 #include <asm/crypto/serpent-sse2.h>
 #include <asm/crypto/glue_helper.h>
 
+static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
+				   const u8 *key, unsigned int keylen)
+{
+	return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
+}
+
 static void serpent_decrypt_cbc_xway(void *ctx, u128 *dst, const u128 *src)
 {
 	u128 ivs[SERPENT_PARALLEL_BLOCKS - 1];
@@ -137,166 +140,79 @@ static const struct common_glue_ctx serpent_dec_cbc = {
 	} }
 };
 
-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(&serpent_enc, desc, dst, src, nbytes);
+	return glue_ecb_req_128bit(&serpent_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(&serpent_dec, desc, dst, src, nbytes);
+	return glue_ecb_req_128bit(&serpent_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(__serpent_encrypt), desc,
-				     dst, src, nbytes);
+	return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(__serpent_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(&serpent_dec_cbc, desc, dst, src,
-				       nbytes);
+	return glue_cbc_decrypt_req_128bit(&serpent_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(&serpent_ctr, desc, dst, src, nbytes);
+	return glue_ctr_req_128bit(&serpent_ctr, req);
 }
 
-static struct crypto_alg serpent_algs[] = { {
-	.cra_name		= "__ecb-serpent-sse2",
-	.cra_driver_name	= "__driver-ecb-serpent-sse2",
-	.cra_priority		= 0,
-	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
-				  CRYPTO_ALG_INTERNAL,
-	.cra_blocksize		= SERPENT_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct serpent_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_blkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_u = {
-		.blkcipher = {
-			.min_keysize	= SERPENT_MIN_KEY_SIZE,
-			.max_keysize	= SERPENT_MAX_KEY_SIZE,
-			.setkey		= serpent_setkey,
-			.encrypt	= ecb_encrypt,
-			.decrypt	= ecb_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "__cbc-serpent-sse2",
-	.cra_driver_name	= "__driver-cbc-serpent-sse2",
-	.cra_priority		= 0,
-	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
-				  CRYPTO_ALG_INTERNAL,
-	.cra_blocksize		= SERPENT_BLOCK_SIZE,
-	.cra_ctxsize		= sizeof(struct serpent_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_blkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_u = {
-		.blkcipher = {
-			.min_keysize	= SERPENT_MIN_KEY_SIZE,
-			.max_keysize	= SERPENT_MAX_KEY_SIZE,
-			.setkey		= serpent_setkey,
-			.encrypt	= cbc_encrypt,
-			.decrypt	= cbc_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "__ctr-serpent-sse2",
-	.cra_driver_name	= "__driver-ctr-serpent-sse2",
-	.cra_priority		= 0,
-	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER |
-				  CRYPTO_ALG_INTERNAL,
-	.cra_blocksize		= 1,
-	.cra_ctxsize		= sizeof(struct serpent_ctx),
-	.cra_alignmask		= 0,
-	.cra_type		= &crypto_blkcipher_type,
-	.cra_module		= THIS_MODULE,
-	.cra_u = {
-		.blkcipher = {
-			.min_keysize	= SERPENT_MIN_KEY_SIZE,
-			.max_keysize	= SERPENT_MAX_KEY_SIZE,
-			.ivsize		= SERPENT_BLOCK_SIZE,
-			.setkey		= serpent_setkey,
-			.encrypt	= ctr_crypt,
-			.decrypt	= ctr_crypt,
-		},
-	},
-}, {
-	.cra_name		= "ecb(serpent)",
-	.cra_driver_name	= "ecb-serpent-sse2",
-	.cra_priority		= 400,
-	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
-	.cra_blocksize		= SERPENT_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	= SERPENT_MIN_KEY_SIZE,
-			.max_keysize	= SERPENT_MAX_KEY_SIZE,
-			.setkey		= ablk_set_key,
-			.encrypt	= ablk_encrypt,
-			.decrypt	= ablk_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "cbc(serpent)",
-	.cra_driver_name	= "cbc-serpent-sse2",
-	.cra_priority		= 400,
-	.cra_flags		= CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
-	.cra_blocksize		= SERPENT_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	= SERPENT_MIN_KEY_SIZE,
-			.max_keysize	= SERPENT_MAX_KEY_SIZE,
-			.ivsize		= SERPENT_BLOCK_SIZE,
-			.setkey		= ablk_set_key,
-			.encrypt	= __ablk_encrypt,
-			.decrypt	= ablk_decrypt,
-		},
-	},
-}, {
-	.cra_name		= "ctr(serpent)",
-	.cra_driver_name	= "ctr-serpent-sse2",
-	.cra_priority		= 400,
-	.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	= SERPENT_MIN_KEY_SIZE,
-			.max_keysize	= SERPENT_MAX_KEY_SIZE,
-			.ivsize		= SERPENT_BLOCK_SIZE,
-			.setkey		= ablk_set_key,
-			.encrypt	= ablk_encrypt,
-			.decrypt	= ablk_encrypt,
-			.geniv		= "chainiv",
-		},
+static struct skcipher_alg serpent_algs[] = {
+	{
+		.base.cra_name		= "__ecb(serpent)",
+		.base.cra_driver_name	= "__ecb-serpent-sse2",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= SERPENT_MIN_KEY_SIZE,
+		.max_keysize		= SERPENT_MAX_KEY_SIZE,
+		.setkey			= serpent_setkey_skcipher,
+		.encrypt		= ecb_encrypt,
+		.decrypt		= ecb_decrypt,
+	}, {
+		.base.cra_name		= "__cbc(serpent)",
+		.base.cra_driver_name	= "__cbc-serpent-sse2",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= SERPENT_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= SERPENT_MIN_KEY_SIZE,
+		.max_keysize		= SERPENT_MAX_KEY_SIZE,
+		.ivsize			= SERPENT_BLOCK_SIZE,
+		.setkey			= serpent_setkey_skcipher,
+		.encrypt		= cbc_encrypt,
+		.decrypt		= cbc_decrypt,
+	}, {
+		.base.cra_name		= "__ctr(serpent)",
+		.base.cra_driver_name	= "__ctr-serpent-sse2",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= 1,
+		.base.cra_ctxsize	= sizeof(struct serpent_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= SERPENT_MIN_KEY_SIZE,
+		.max_keysize		= SERPENT_MAX_KEY_SIZE,
+		.ivsize			= SERPENT_BLOCK_SIZE,
+		.chunksize		= SERPENT_BLOCK_SIZE,
+		.setkey			= serpent_setkey_skcipher,
+		.encrypt		= ctr_crypt,
+		.decrypt		= ctr_crypt,
 	},
-} };
+};
+
+static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];
 
 static int __init serpent_sse2_init(void)
 {
@@ -305,12 +221,15 @@ static int __init serpent_sse2_init(void)
 		return -ENODEV;
 	}
 
-	return crypto_register_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
+	return simd_register_skciphers_compat(serpent_algs,
+					      ARRAY_SIZE(serpent_algs),
+					      serpent_simd_algs);
 }
 
 static void __exit serpent_sse2_exit(void)
 {
-	crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
+	simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
+				  serpent_simd_algs);
 }
 
 module_init(serpent_sse2_init);