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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>
This commit is contained in:
Eric Biggers
Herbert Xu
parent
fabdf25388
commit
713b2e7203
@ -10,6 +10,7 @@
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/internal/skcipher.h>
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#include <crypto/padlock.h>
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#include <linux/module.h>
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#include <linux/init.h>
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@ -97,9 +98,9 @@ static inline struct aes_ctx *aes_ctx(struct crypto_tfm *tfm)
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return aes_ctx_common(crypto_tfm_ctx(tfm));
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}
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static inline struct aes_ctx *blk_aes_ctx(struct crypto_blkcipher *tfm)
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static inline struct aes_ctx *skcipher_aes_ctx(struct crypto_skcipher *tfm)
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{
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return aes_ctx_common(crypto_blkcipher_ctx(tfm));
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return aes_ctx_common(crypto_skcipher_ctx(tfm));
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}
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static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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@ -162,6 +163,12 @@ ok:
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return 0;
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}
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static int aes_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *in_key,
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unsigned int key_len)
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{
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return aes_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
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}
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/* ====== Encryption/decryption routines ====== */
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/* These are the real call to PadLock. */
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@ -338,25 +345,24 @@ static struct crypto_alg aes_alg = {
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}
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};
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static int ecb_aes_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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static int ecb_aes_encrypt(struct skcipher_request *req)
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{
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struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
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struct blkcipher_walk walk;
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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padlock_reset_key(&ctx->cword.encrypt);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes)) {
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while ((nbytes = walk.nbytes) != 0) {
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padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
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ctx->E, &ctx->cword.encrypt,
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nbytes / AES_BLOCK_SIZE);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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err = skcipher_walk_done(&walk, nbytes);
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}
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padlock_store_cword(&ctx->cword.encrypt);
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@ -364,25 +370,24 @@ static int ecb_aes_encrypt(struct blkcipher_desc *desc,
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return err;
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}
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static int ecb_aes_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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static int ecb_aes_decrypt(struct skcipher_request *req)
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{
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struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
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struct blkcipher_walk walk;
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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padlock_reset_key(&ctx->cword.decrypt);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes)) {
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while ((nbytes = walk.nbytes) != 0) {
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padlock_xcrypt_ecb(walk.src.virt.addr, walk.dst.virt.addr,
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ctx->D, &ctx->cword.decrypt,
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nbytes / AES_BLOCK_SIZE);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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err = skcipher_walk_done(&walk, nbytes);
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}
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padlock_store_cword(&ctx->cword.encrypt);
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@ -390,48 +395,41 @@ static int ecb_aes_decrypt(struct blkcipher_desc *desc,
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return err;
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}
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static struct crypto_alg ecb_aes_alg = {
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.cra_name = "ecb(aes)",
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.cra_driver_name = "ecb-aes-padlock",
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.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct aes_ctx),
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.cra_alignmask = PADLOCK_ALIGNMENT - 1,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.setkey = aes_set_key,
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.encrypt = ecb_aes_encrypt,
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.decrypt = ecb_aes_decrypt,
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}
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}
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static struct skcipher_alg ecb_aes_alg = {
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.base.cra_name = "ecb(aes)",
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.base.cra_driver_name = "ecb-aes-padlock",
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.base.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct aes_ctx),
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.base.cra_alignmask = PADLOCK_ALIGNMENT - 1,
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.base.cra_module = THIS_MODULE,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.setkey = aes_set_key_skcipher,
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.encrypt = ecb_aes_encrypt,
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.decrypt = ecb_aes_decrypt,
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};
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static int cbc_aes_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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static int cbc_aes_encrypt(struct skcipher_request *req)
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{
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struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
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struct blkcipher_walk walk;
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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padlock_reset_key(&ctx->cword.encrypt);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes)) {
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while ((nbytes = walk.nbytes) != 0) {
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u8 *iv = padlock_xcrypt_cbc(walk.src.virt.addr,
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walk.dst.virt.addr, ctx->E,
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walk.iv, &ctx->cword.encrypt,
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nbytes / AES_BLOCK_SIZE);
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memcpy(walk.iv, iv, AES_BLOCK_SIZE);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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err = skcipher_walk_done(&walk, nbytes);
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}
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padlock_store_cword(&ctx->cword.decrypt);
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@ -439,25 +437,24 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
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return err;
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}
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static int cbc_aes_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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static int cbc_aes_decrypt(struct skcipher_request *req)
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{
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struct aes_ctx *ctx = blk_aes_ctx(desc->tfm);
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struct blkcipher_walk walk;
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct aes_ctx *ctx = skcipher_aes_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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padlock_reset_key(&ctx->cword.encrypt);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes)) {
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while ((nbytes = walk.nbytes) != 0) {
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padlock_xcrypt_cbc(walk.src.virt.addr, walk.dst.virt.addr,
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ctx->D, walk.iv, &ctx->cword.decrypt,
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nbytes / AES_BLOCK_SIZE);
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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err = skcipher_walk_done(&walk, nbytes);
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}
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padlock_store_cword(&ctx->cword.encrypt);
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@ -465,26 +462,20 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
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return err;
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}
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static struct crypto_alg cbc_aes_alg = {
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.cra_name = "cbc(aes)",
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.cra_driver_name = "cbc-aes-padlock",
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.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct aes_ctx),
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.cra_alignmask = PADLOCK_ALIGNMENT - 1,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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.setkey = aes_set_key,
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.encrypt = cbc_aes_encrypt,
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.decrypt = cbc_aes_decrypt,
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}
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}
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static struct skcipher_alg cbc_aes_alg = {
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.base.cra_name = "cbc(aes)",
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.base.cra_driver_name = "cbc-aes-padlock",
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.base.cra_priority = PADLOCK_COMPOSITE_PRIORITY,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct aes_ctx),
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.base.cra_alignmask = PADLOCK_ALIGNMENT - 1,
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.base.cra_module = THIS_MODULE,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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.setkey = aes_set_key_skcipher,
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.encrypt = cbc_aes_encrypt,
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.decrypt = cbc_aes_decrypt,
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};
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static const struct x86_cpu_id padlock_cpu_id[] = {
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@ -506,13 +497,13 @@ static int __init padlock_init(void)
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return -ENODEV;
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}
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if ((ret = crypto_register_alg(&aes_alg)))
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if ((ret = crypto_register_alg(&aes_alg)) != 0)
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goto aes_err;
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if ((ret = crypto_register_alg(&ecb_aes_alg)))
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if ((ret = crypto_register_skcipher(&ecb_aes_alg)) != 0)
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goto ecb_aes_err;
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if ((ret = crypto_register_alg(&cbc_aes_alg)))
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if ((ret = crypto_register_skcipher(&cbc_aes_alg)) != 0)
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goto cbc_aes_err;
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printk(KERN_NOTICE PFX "Using VIA PadLock ACE for AES algorithm.\n");
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@ -527,7 +518,7 @@ out:
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return ret;
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cbc_aes_err:
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crypto_unregister_alg(&ecb_aes_alg);
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crypto_unregister_skcipher(&ecb_aes_alg);
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ecb_aes_err:
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crypto_unregister_alg(&aes_alg);
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aes_err:
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@ -537,8 +528,8 @@ aes_err:
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static void __exit padlock_fini(void)
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{
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crypto_unregister_alg(&cbc_aes_alg);
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crypto_unregister_alg(&ecb_aes_alg);
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crypto_unregister_skcipher(&cbc_aes_alg);
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crypto_unregister_skcipher(&ecb_aes_alg);
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crypto_unregister_alg(&aes_alg);
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}
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