crypto: padlock-aes - convert to skcipher API

Convert the VIA PadLock implementations of AES-ECB and AES-CBC from the
deprecated "blkcipher" API to the "skcipher" API.  This is needed in
order for the blkcipher API to be removed.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index 8a06612..c5b60f5 100644 (file)
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -10,6 +10,7 @@
 
 #include <crypto/algapi.h>
 #include <crypto/aes.h>
+#include <crypto/internal/skcipher.h>
 #include <crypto/padlock.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -97,9 +98,9 @@ static inline struct aes_ctx *aes_ctx(struct crypto_tfm *tfm)
        return aes_ctx_common(crypto_tfm_ctx(tfm));
 }
 
-static inline struct aes_ctx *blk_aes_ctx(struct crypto_blkcipher *tfm)
+static inline struct aes_ctx *skcipher_aes_ctx(struct crypto_skcipher *tfm)
 {
-       return aes_ctx_common(crypto_blkcipher_ctx(tfm));
+       return aes_ctx_common(crypto_skcipher_ctx(tfm));
 }
 
 static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
@@ -162,6 +163,12 @@ ok:
        return 0;
 }
 
+static int aes_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *in_key,
+                               unsigned int key_len)
+{
+       return aes_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
+}
+
 /* ====== Encryption/decryption routines ====== */
 
 /* These are the real call to PadLock. */
@@ -338,25 +345,24 @@ static struct crypto_alg aes_alg = {
        }
 };
 
-static int ecb_aes_encrypt(struct blkcipher_desc *desc,
-                          struct scatterlist *dst, struct scatterlist *src,
-                          unsigned int nbytes)
+static int ecb_aes_encrypt(struct skcipher_request *req)
 {
-       struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
-       struct blkcipher_walk walk;
+       struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+       struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
+       struct skcipher_walk walk;
+       unsigned int nbytes;
        int err;
 
        padlock_reset_key(&ctx->cword.encrypt);
 
-       blkcipher_walk_init(&walk, dst, src, nbytes);
-       err = blkcipher_walk_virt(desc, &walk);
+       err = skcipher_walk_virt(&walk, req, false);
 
-       while ((nbytes = walk.nbytes)) {
+       while ((nbytes = walk.nbytes) != 0) {
                padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
                                   ctx->E, &ctx->cword.encrypt,
                                   nbytes / AES_BLOCK_SIZE);
                nbytes &= AES_BLOCK_SIZE - 1;
-               err = blkcipher_walk_done(desc, &walk, nbytes);
+               err = skcipher_walk_done(&walk, nbytes);
        }
 
        padlock_store_cword(&ctx->cword.encrypt);
@@ -364,25 +370,24 @@ static int ecb_aes_encrypt(struct blkcipher_desc *desc,
        return err;
 }
 
-static int ecb_aes_decrypt(struct blkcipher_desc *desc,
-                          struct scatterlist *dst, struct scatterlist *src,
-                          unsigned int nbytes)
+static int ecb_aes_decrypt(struct skcipher_request *req)
 {
-       struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
-       struct blkcipher_walk walk;
+       struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+       struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
+       struct skcipher_walk walk;
+       unsigned int nbytes;
        int err;
 
        padlock_reset_key(&ctx->cword.decrypt);
 
-       blkcipher_walk_init(&walk, dst, src, nbytes);
-       err = blkcipher_walk_virt(desc, &walk);
+       err = skcipher_walk_virt(&walk, req, false);
 
-       while ((nbytes = walk.nbytes)) {
+       while ((nbytes = walk.nbytes) != 0) {
                padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
                                   ctx->D, &ctx->cword.decrypt,
                                   nbytes / AES_BLOCK_SIZE);
                nbytes &= AES_BLOCK_SIZE - 1;
-               err = blkcipher_walk_done(desc, &walk, nbytes);
+               err = skcipher_walk_done(&walk, nbytes);
        }
 
        padlock_store_cword(&ctx->cword.encrypt);
@@ -390,48 +395,41 @@ static int ecb_aes_decrypt(struct blkcipher_desc *desc,
        return err;
 }
 
-static struct crypto_alg ecb_aes_alg = {
-       .cra_name               =       "ecb(aes)",
-       .cra_driver_name        =       "ecb-aes-padlock",
-       .cra_priority           =       PADLOCK_COMPOSITE_PRIORITY,
-       .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
-       .cra_blocksize          =       AES_BLOCK_SIZE,
-       .cra_ctxsize            =       sizeof(struct aes_ctx),
-       .cra_alignmask          =       PADLOCK_ALIGNMENT - 1,
-       .cra_type               =       &crypto_blkcipher_type,
-       .cra_module             =       THIS_MODULE,
-       .cra_u                  =       {
-               .blkcipher = {
-                       .min_keysize            =       AES_MIN_KEY_SIZE,
-                       .max_keysize            =       AES_MAX_KEY_SIZE,
-                       .setkey                 =       aes_set_key,
-                       .encrypt                =       ecb_aes_encrypt,
-                       .decrypt                =       ecb_aes_decrypt,
-               }
-       }
+static struct skcipher_alg ecb_aes_alg = {
+       .base.cra_name          =       "ecb(aes)",
+       .base.cra_driver_name   =       "ecb-aes-padlock",
+       .base.cra_priority      =       PADLOCK_COMPOSITE_PRIORITY,
+       .base.cra_blocksize     =       AES_BLOCK_SIZE,
+       .base.cra_ctxsize       =       sizeof(struct aes_ctx),
+       .base.cra_alignmask     =       PADLOCK_ALIGNMENT - 1,
+       .base.cra_module        =       THIS_MODULE,
+       .min_keysize            =       AES_MIN_KEY_SIZE,
+       .max_keysize            =       AES_MAX_KEY_SIZE,
+       .setkey                 =       aes_set_key_skcipher,
+       .encrypt                =       ecb_aes_encrypt,
+       .decrypt                =       ecb_aes_decrypt,
 };
 
-static int cbc_aes_encrypt(struct blkcipher_desc *desc,
-                          struct scatterlist *dst, struct scatterlist *src,
-                          unsigned int nbytes)
+static int cbc_aes_encrypt(struct skcipher_request *req)
 {
-       struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
-       struct blkcipher_walk walk;
+       struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+       struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
+       struct skcipher_walk walk;
+       unsigned int nbytes;
        int err;
 
        padlock_reset_key(&ctx->cword.encrypt);
 
-       blkcipher_walk_init(&walk, dst, src, nbytes);
-       err = blkcipher_walk_virt(desc, &walk);
+       err = skcipher_walk_virt(&walk, req, false);
 
-       while ((nbytes = walk.nbytes)) {
+       while ((nbytes = walk.nbytes) != 0) {
                u8 *iv = padlock_xcrypt_cbc(walk.src.virt.addr,
                                            walk.dst.virt.addr, ctx->E,
                                            walk.iv, &ctx->cword.encrypt,
                                            nbytes / AES_BLOCK_SIZE);
                memcpy(walk.iv, iv, AES_BLOCK_SIZE);
                nbytes &= AES_BLOCK_SIZE - 1;
-               err = blkcipher_walk_done(desc, &walk, nbytes);
+               err = skcipher_walk_done(&walk, nbytes);
        }
 
        padlock_store_cword(&ctx->cword.decrypt);
@@ -439,25 +437,24 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
        return err;
 }
 
-static int cbc_aes_decrypt(struct blkcipher_desc *desc,
-                          struct scatterlist *dst, struct scatterlist *src,
-                          unsigned int nbytes)
+static int cbc_aes_decrypt(struct skcipher_request *req)
 {
-       struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
-       struct blkcipher_walk walk;
+       struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+       struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
+       struct skcipher_walk walk;
+       unsigned int nbytes;
        int err;
 
        padlock_reset_key(&ctx->cword.encrypt);
 
-       blkcipher_walk_init(&walk, dst, src, nbytes);
-       err = blkcipher_walk_virt(desc, &walk);
+       err = skcipher_walk_virt(&walk, req, false);
 
-       while ((nbytes = walk.nbytes)) {
+       while ((nbytes = walk.nbytes) != 0) {
                padlock_xcrypt_cbc(walk.src.virt.addr, walk.dst.virt.addr,
                                   ctx->D, walk.iv, &ctx->cword.decrypt,
                                   nbytes / AES_BLOCK_SIZE);
                nbytes &= AES_BLOCK_SIZE - 1;
-               err = blkcipher_walk_done(desc, &walk, nbytes);
+               err = skcipher_walk_done(&walk, nbytes);
        }
 
        padlock_store_cword(&ctx->cword.encrypt);
@@ -465,26 +462,20 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
        return err;
 }
 
-static struct crypto_alg cbc_aes_alg = {
-       .cra_name               =       "cbc(aes)",
-       .cra_driver_name        =       "cbc-aes-padlock",
-       .cra_priority           =       PADLOCK_COMPOSITE_PRIORITY,
-       .cra_flags              =       CRYPTO_ALG_TYPE_BLKCIPHER,
-       .cra_blocksize          =       AES_BLOCK_SIZE,
-       .cra_ctxsize            =       sizeof(struct aes_ctx),
-       .cra_alignmask          =       PADLOCK_ALIGNMENT - 1,
-       .cra_type               =       &crypto_blkcipher_type,
-       .cra_module             =       THIS_MODULE,
-       .cra_u                  =       {
-               .blkcipher = {
-                       .min_keysize            =       AES_MIN_KEY_SIZE,
-                       .max_keysize            =       AES_MAX_KEY_SIZE,
-                       .ivsize                 =       AES_BLOCK_SIZE,
-                       .setkey                 =       aes_set_key,
-                       .encrypt                =       cbc_aes_encrypt,
-                       .decrypt                =       cbc_aes_decrypt,
-               }
-       }
+static struct skcipher_alg cbc_aes_alg = {
+       .base.cra_name          =       "cbc(aes)",
+       .base.cra_driver_name   =       "cbc-aes-padlock",
+       .base.cra_priority      =       PADLOCK_COMPOSITE_PRIORITY,
+       .base.cra_blocksize     =       AES_BLOCK_SIZE,
+       .base.cra_ctxsize       =       sizeof(struct aes_ctx),
+       .base.cra_alignmask     =       PADLOCK_ALIGNMENT - 1,
+       .base.cra_module        =       THIS_MODULE,
+       .min_keysize            =       AES_MIN_KEY_SIZE,
+       .max_keysize            =       AES_MAX_KEY_SIZE,
+       .ivsize                 =       AES_BLOCK_SIZE,
+       .setkey                 =       aes_set_key_skcipher,
+       .encrypt                =       cbc_aes_encrypt,
+       .decrypt                =       cbc_aes_decrypt,
 };
 
 static const struct x86_cpu_id padlock_cpu_id[] = {
@@ -506,13 +497,13 @@ static int __init padlock_init(void)
                return -ENODEV;
        }
 
-       if ((ret = crypto_register_alg(&aes_alg)))
+       if ((ret = crypto_register_alg(&aes_alg)) != 0)
                goto aes_err;
 
-       if ((ret = crypto_register_alg(&ecb_aes_alg)))
+       if ((ret = crypto_register_skcipher(&ecb_aes_alg)) != 0)
                goto ecb_aes_err;
 
-       if ((ret = crypto_register_alg(&cbc_aes_alg)))
+       if ((ret = crypto_register_skcipher(&cbc_aes_alg)) != 0)
                goto cbc_aes_err;
 
        printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n");
@@ -527,7 +518,7 @@ out:
        return ret;
 
 cbc_aes_err:
-       crypto_unregister_alg(&ecb_aes_alg);
+       crypto_unregister_skcipher(&ecb_aes_alg);
 ecb_aes_err:
        crypto_unregister_alg(&aes_alg);
 aes_err:
@@ -537,8 +528,8 @@ aes_err:
 
 static void __exit padlock_fini(void)
 {
-       crypto_unregister_alg(&cbc_aes_alg);
-       crypto_unregister_alg(&ecb_aes_alg);
+       crypto_unregister_skcipher(&cbc_aes_alg);
+       crypto_unregister_skcipher(&ecb_aes_alg);
        crypto_unregister_alg(&aes_alg);
 }