crypto: x86/blowfish: convert to skcipher interface
Convert the x86 asm implementation of Blowfish from the (deprecated) blkcipher interface over to the skcipher interface. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
Herbert Xu
parent
4bd9692431
commit
c1679171c6
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@ -25,13 +25,13 @@
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*
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*/
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#include <asm/processor.h>
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#include <crypto/algapi.h>
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#include <crypto/blowfish.h>
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#include <crypto/internal/skcipher.h>
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#include <linux/crypto.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <crypto/algapi.h>
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/* regular block cipher functions */
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asmlinkage void __blowfish_enc_blk(struct bf_ctx *ctx, u8 *dst, const u8 *src,
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@ -77,20 +77,28 @@ static void blowfish_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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blowfish_dec_blk(crypto_tfm_ctx(tfm), dst, src);
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}
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static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
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static int blowfish_setkey_skcipher(struct crypto_skcipher *tfm,
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const u8 *key, unsigned int keylen)
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{
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return blowfish_setkey(&tfm->base, key, keylen);
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}
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static int ecb_crypt(struct skcipher_request *req,
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void (*fn)(struct bf_ctx *, u8 *, const u8 *),
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void (*fn_4way)(struct bf_ctx *, u8 *, const u8 *))
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{
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struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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unsigned int bsize = BF_BLOCK_SIZE;
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct bf_ctx *ctx = crypto_skcipher_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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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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u8 *wsrc = walk->src.virt.addr;
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u8 *wdst = walk->dst.virt.addr;
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while ((nbytes = walk.nbytes)) {
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u8 *wsrc = walk.src.virt.addr;
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u8 *wdst = walk.dst.virt.addr;
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/* Process four block batch */
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if (nbytes >= bsize * 4) {
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@ -116,34 +124,25 @@ static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
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} while (nbytes >= bsize);
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done:
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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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return err;
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}
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static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int ecb_encrypt(struct skcipher_request *req)
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{
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_crypt(desc, &walk, blowfish_enc_blk, blowfish_enc_blk_4way);
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return ecb_crypt(req, blowfish_enc_blk, blowfish_enc_blk_4way);
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}
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static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int ecb_decrypt(struct skcipher_request *req)
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{
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_crypt(desc, &walk, blowfish_dec_blk, blowfish_dec_blk_4way);
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return ecb_crypt(req, blowfish_dec_blk, blowfish_dec_blk_4way);
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}
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static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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static unsigned int __cbc_encrypt(struct bf_ctx *ctx,
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struct skcipher_walk *walk)
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{
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struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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unsigned int bsize = BF_BLOCK_SIZE;
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unsigned int nbytes = walk->nbytes;
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u64 *src = (u64 *)walk->src.virt.addr;
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@ -164,27 +163,27 @@ static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
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return nbytes;
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}
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static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int cbc_encrypt(struct skcipher_request *req)
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{
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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 bf_ctx *ctx = crypto_skcipher_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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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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nbytes = __cbc_encrypt(desc, &walk);
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err = blkcipher_walk_done(desc, &walk, nbytes);
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nbytes = __cbc_encrypt(ctx, &walk);
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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static unsigned int __cbc_decrypt(struct bf_ctx *ctx,
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struct skcipher_walk *walk)
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{
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struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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unsigned int bsize = BF_BLOCK_SIZE;
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unsigned int nbytes = walk->nbytes;
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u64 *src = (u64 *)walk->src.virt.addr;
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@ -245,24 +244,25 @@ static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
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return nbytes;
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}
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static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int cbc_decrypt(struct skcipher_request *req)
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{
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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 bf_ctx *ctx = crypto_skcipher_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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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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nbytes = __cbc_decrypt(desc, &walk);
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err = blkcipher_walk_done(desc, &walk, nbytes);
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nbytes = __cbc_decrypt(ctx, &walk);
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err = skcipher_walk_done(&walk, nbytes);
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}
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return err;
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}
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static void ctr_crypt_final(struct bf_ctx *ctx, struct blkcipher_walk *walk)
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static void ctr_crypt_final(struct bf_ctx *ctx, struct skcipher_walk *walk)
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{
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u8 *ctrblk = walk->iv;
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u8 keystream[BF_BLOCK_SIZE];
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@ -276,10 +276,8 @@ static void ctr_crypt_final(struct bf_ctx *ctx, struct blkcipher_walk *walk)
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crypto_inc(ctrblk, BF_BLOCK_SIZE);
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}
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static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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static unsigned int __ctr_crypt(struct bf_ctx *ctx, struct skcipher_walk *walk)
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{
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struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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unsigned int bsize = BF_BLOCK_SIZE;
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unsigned int nbytes = walk->nbytes;
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u64 *src = (u64 *)walk->src.virt.addr;
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@ -332,29 +330,30 @@ static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
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return nbytes;
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}
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static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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static int ctr_crypt(struct skcipher_request *req)
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{
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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 bf_ctx *ctx = crypto_skcipher_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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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt_block(desc, &walk, BF_BLOCK_SIZE);
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err = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) >= BF_BLOCK_SIZE) {
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nbytes = __ctr_crypt(desc, &walk);
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err = blkcipher_walk_done(desc, &walk, nbytes);
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nbytes = __ctr_crypt(ctx, &walk);
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err = skcipher_walk_done(&walk, nbytes);
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}
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if (walk.nbytes) {
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ctr_crypt_final(crypto_blkcipher_ctx(desc->tfm), &walk);
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err = blkcipher_walk_done(desc, &walk, 0);
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if (nbytes) {
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ctr_crypt_final(ctx, &walk);
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err = skcipher_walk_done(&walk, 0);
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}
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return err;
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}
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static struct crypto_alg bf_algs[4] = { {
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static struct crypto_alg bf_cipher_alg = {
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.cra_name = "blowfish",
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.cra_driver_name = "blowfish-asm",
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.cra_priority = 200,
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@ -372,66 +371,50 @@ static struct crypto_alg bf_algs[4] = { {
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.cia_decrypt = blowfish_decrypt,
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}
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}
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}, {
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.cra_name = "ecb(blowfish)",
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.cra_driver_name = "ecb-blowfish-asm",
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.cra_priority = 300,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = BF_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct bf_ctx),
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.cra_alignmask = 0,
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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 = BF_MIN_KEY_SIZE,
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.max_keysize = BF_MAX_KEY_SIZE,
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.setkey = blowfish_setkey,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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},
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};
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static struct skcipher_alg bf_skcipher_algs[] = {
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{
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.base.cra_name = "ecb(blowfish)",
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.base.cra_driver_name = "ecb-blowfish-asm",
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.base.cra_priority = 300,
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.base.cra_blocksize = BF_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct bf_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = BF_MIN_KEY_SIZE,
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.max_keysize = BF_MAX_KEY_SIZE,
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.setkey = blowfish_setkey_skcipher,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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}, {
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.base.cra_name = "cbc(blowfish)",
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.base.cra_driver_name = "cbc-blowfish-asm",
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.base.cra_priority = 300,
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.base.cra_blocksize = BF_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct bf_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = BF_MIN_KEY_SIZE,
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.max_keysize = BF_MAX_KEY_SIZE,
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.ivsize = BF_BLOCK_SIZE,
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.setkey = blowfish_setkey_skcipher,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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}, {
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.base.cra_name = "ctr(blowfish)",
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.base.cra_driver_name = "ctr-blowfish-asm",
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.base.cra_priority = 300,
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.base.cra_blocksize = 1,
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.base.cra_ctxsize = sizeof(struct bf_ctx),
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.base.cra_module = THIS_MODULE,
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.min_keysize = BF_MIN_KEY_SIZE,
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.max_keysize = BF_MAX_KEY_SIZE,
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.ivsize = BF_BLOCK_SIZE,
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.chunksize = BF_BLOCK_SIZE,
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.setkey = blowfish_setkey_skcipher,
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.encrypt = ctr_crypt,
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.decrypt = ctr_crypt,
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},
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}, {
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.cra_name = "cbc(blowfish)",
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.cra_driver_name = "cbc-blowfish-asm",
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.cra_priority = 300,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = BF_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct bf_ctx),
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.cra_alignmask = 0,
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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 = BF_MIN_KEY_SIZE,
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.max_keysize = BF_MAX_KEY_SIZE,
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.ivsize = BF_BLOCK_SIZE,
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.setkey = blowfish_setkey,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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},
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},
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}, {
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.cra_name = "ctr(blowfish)",
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.cra_driver_name = "ctr-blowfish-asm",
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.cra_priority = 300,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = 1,
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.cra_ctxsize = sizeof(struct bf_ctx),
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.cra_alignmask = 0,
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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 = BF_MIN_KEY_SIZE,
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.max_keysize = BF_MAX_KEY_SIZE,
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.ivsize = BF_BLOCK_SIZE,
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.setkey = blowfish_setkey,
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.encrypt = ctr_crypt,
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.decrypt = ctr_crypt,
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},
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},
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} };
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};
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static bool is_blacklisted_cpu(void)
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{
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@ -456,6 +439,8 @@ MODULE_PARM_DESC(force, "Force module load, ignore CPU blacklist");
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static int __init init(void)
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{
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int err;
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if (!force && is_blacklisted_cpu()) {
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printk(KERN_INFO
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"blowfish-x86_64: performance on this CPU "
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@ -464,12 +449,23 @@ static int __init init(void)
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return -ENODEV;
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}
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return crypto_register_algs(bf_algs, ARRAY_SIZE(bf_algs));
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err = crypto_register_alg(&bf_cipher_alg);
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if (err)
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return err;
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err = crypto_register_skciphers(bf_skcipher_algs,
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ARRAY_SIZE(bf_skcipher_algs));
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if (err)
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crypto_unregister_alg(&bf_cipher_alg);
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return err;
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}
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static void __exit fini(void)
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{
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crypto_unregister_algs(bf_algs, ARRAY_SIZE(bf_algs));
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crypto_unregister_alg(&bf_cipher_alg);
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crypto_unregister_skciphers(bf_skcipher_algs,
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ARRAY_SIZE(bf_skcipher_algs));
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}
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module_init(init);
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@ -1114,7 +1114,7 @@ config CRYPTO_BLOWFISH_COMMON
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config CRYPTO_BLOWFISH_X86_64
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tristate "Blowfish cipher algorithm (x86_64)"
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depends on X86 && 64BIT
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select CRYPTO_ALGAPI
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select CRYPTO_BLKCIPHER
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select CRYPTO_BLOWFISH_COMMON
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help
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Blowfish cipher algorithm (x86_64), by Bruce Schneier.
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