crypto: s390/aes - convert to skcipher API
Convert the glue code for the S390 CPACF implementations of AES-ECB, AES-CBC, AES-XTS, and AES-CTR from the deprecated "blkcipher" API to the "skcipher" API. This is needed in order for the blkcipher API to be removed. Note: I made CTR use the same function for encryption and decryption, since CTR encryption and decryption are identical. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
Herbert Xu
parent
cd5d2f8457
commit
7988fb2c03
@ -44,7 +44,7 @@ struct s390_aes_ctx {
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int key_len;
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unsigned long fc;
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union {
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struct crypto_sync_skcipher *blk;
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struct crypto_skcipher *skcipher;
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struct crypto_cipher *cip;
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} fallback;
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};
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@ -54,7 +54,7 @@ struct s390_xts_ctx {
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u8 pcc_key[32];
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int key_len;
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unsigned long fc;
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struct crypto_sync_skcipher *fallback;
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struct crypto_skcipher *fallback;
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};
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struct gcm_sg_walk {
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@ -178,66 +178,41 @@ static struct crypto_alg aes_alg = {
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}
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};
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static int setkey_fallback_blk(struct crypto_tfm *tfm, const u8 *key,
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unsigned int len)
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static int setkey_fallback_skcipher(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int len)
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{
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struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
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unsigned int ret;
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crypto_sync_skcipher_clear_flags(sctx->fallback.blk,
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CRYPTO_TFM_REQ_MASK);
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crypto_sync_skcipher_set_flags(sctx->fallback.blk, tfm->crt_flags &
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CRYPTO_TFM_REQ_MASK);
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ret = crypto_sync_skcipher_setkey(sctx->fallback.blk, key, len);
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tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
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tfm->crt_flags |= crypto_sync_skcipher_get_flags(sctx->fallback.blk) &
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CRYPTO_TFM_RES_MASK;
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struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
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int ret;
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crypto_skcipher_clear_flags(sctx->fallback.skcipher,
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CRYPTO_TFM_REQ_MASK);
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crypto_skcipher_set_flags(sctx->fallback.skcipher,
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crypto_skcipher_get_flags(tfm) &
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CRYPTO_TFM_REQ_MASK);
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ret = crypto_skcipher_setkey(sctx->fallback.skcipher, key, len);
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crypto_skcipher_set_flags(tfm,
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crypto_skcipher_get_flags(sctx->fallback.skcipher) &
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CRYPTO_TFM_RES_MASK);
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return ret;
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}
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static int fallback_blk_dec(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 fallback_skcipher_crypt(struct s390_aes_ctx *sctx,
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struct skcipher_request *req,
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unsigned long modifier)
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{
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unsigned int ret;
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struct crypto_blkcipher *tfm = desc->tfm;
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struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(tfm);
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SYNC_SKCIPHER_REQUEST_ON_STACK(req, sctx->fallback.blk);
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struct skcipher_request *subreq = skcipher_request_ctx(req);
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skcipher_request_set_sync_tfm(req, sctx->fallback.blk);
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skcipher_request_set_callback(req, desc->flags, NULL, NULL);
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skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
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ret = crypto_skcipher_decrypt(req);
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skcipher_request_zero(req);
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return ret;
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*subreq = *req;
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skcipher_request_set_tfm(subreq, sctx->fallback.skcipher);
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return (modifier & CPACF_DECRYPT) ?
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crypto_skcipher_decrypt(subreq) :
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crypto_skcipher_encrypt(subreq);
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}
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static int fallback_blk_enc(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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{
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unsigned int ret;
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struct crypto_blkcipher *tfm = desc->tfm;
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struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(tfm);
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SYNC_SKCIPHER_REQUEST_ON_STACK(req, sctx->fallback.blk);
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skcipher_request_set_sync_tfm(req, sctx->fallback.blk);
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skcipher_request_set_callback(req, desc->flags, NULL, NULL);
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skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
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ret = crypto_skcipher_encrypt(req);
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return ret;
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}
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static int ecb_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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static int ecb_aes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
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unsigned int key_len)
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{
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struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
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struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
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unsigned long fc;
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/* Pick the correct function code based on the key length */
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@ -248,111 +223,92 @@ static int ecb_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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/* Check if the function code is available */
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sctx->fc = (fc && cpacf_test_func(&km_functions, fc)) ? fc : 0;
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if (!sctx->fc)
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return setkey_fallback_blk(tfm, in_key, key_len);
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return setkey_fallback_skcipher(tfm, in_key, key_len);
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sctx->key_len = key_len;
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memcpy(sctx->key, in_key, key_len);
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return 0;
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}
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static int ecb_aes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
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struct blkcipher_walk *walk)
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static int ecb_aes_crypt(struct skcipher_request *req, unsigned long modifier)
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{
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struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes, n;
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int ret;
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ret = blkcipher_walk_virt(desc, walk);
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while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
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if (unlikely(!sctx->fc))
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return fallback_skcipher_crypt(sctx, req, modifier);
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ret = skcipher_walk_virt(&walk, req, false);
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while ((nbytes = walk.nbytes) != 0) {
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/* only use complete blocks */
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n = nbytes & ~(AES_BLOCK_SIZE - 1);
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cpacf_km(sctx->fc | modifier, sctx->key,
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walk->dst.virt.addr, walk->src.virt.addr, n);
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ret = blkcipher_walk_done(desc, walk, nbytes - n);
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walk.dst.virt.addr, walk.src.virt.addr, n);
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ret = skcipher_walk_done(&walk, nbytes - n);
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}
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return ret;
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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 s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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if (unlikely(!sctx->fc))
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return fallback_blk_enc(desc, dst, src, nbytes);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_aes_crypt(desc, 0, &walk);
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return ecb_aes_crypt(req, 0);
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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 s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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if (unlikely(!sctx->fc))
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return fallback_blk_dec(desc, dst, src, nbytes);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_aes_crypt(desc, CPACF_DECRYPT, &walk);
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return ecb_aes_crypt(req, CPACF_DECRYPT);
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}
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static int fallback_init_blk(struct crypto_tfm *tfm)
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static int fallback_init_skcipher(struct crypto_skcipher *tfm)
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{
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const char *name = tfm->__crt_alg->cra_name;
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struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
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const char *name = crypto_tfm_alg_name(&tfm->base);
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struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
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sctx->fallback.blk = crypto_alloc_sync_skcipher(name, 0,
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CRYPTO_ALG_NEED_FALLBACK);
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sctx->fallback.skcipher = crypto_alloc_skcipher(name, 0,
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CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC);
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if (IS_ERR(sctx->fallback.blk)) {
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if (IS_ERR(sctx->fallback.skcipher)) {
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pr_err("Allocating AES fallback algorithm %s failed\n",
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name);
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return PTR_ERR(sctx->fallback.blk);
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return PTR_ERR(sctx->fallback.skcipher);
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}
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crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
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crypto_skcipher_reqsize(sctx->fallback.skcipher));
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return 0;
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}
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static void fallback_exit_blk(struct crypto_tfm *tfm)
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static void fallback_exit_skcipher(struct crypto_skcipher *tfm)
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{
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struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
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struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
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crypto_free_sync_skcipher(sctx->fallback.blk);
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crypto_free_skcipher(sctx->fallback.skcipher);
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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-s390",
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.cra_priority = 401, /* combo: aes + ecb + 1 */
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_NEED_FALLBACK,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct s390_aes_ctx),
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_init = fallback_init_blk,
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.cra_exit = fallback_exit_blk,
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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 = ecb_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-s390",
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.base.cra_priority = 401, /* combo: aes + ecb + 1 */
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.base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct s390_aes_ctx),
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.base.cra_module = THIS_MODULE,
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.init = fallback_init_skcipher,
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.exit = fallback_exit_skcipher,
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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 = ecb_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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static int cbc_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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static int cbc_aes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
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unsigned int key_len)
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{
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struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
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struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
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unsigned long fc;
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/* Pick the correct function code based on the key length */
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@ -363,17 +319,18 @@ static int cbc_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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/* Check if the function code is available */
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sctx->fc = (fc && cpacf_test_func(&kmc_functions, fc)) ? fc : 0;
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if (!sctx->fc)
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return setkey_fallback_blk(tfm, in_key, key_len);
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return setkey_fallback_skcipher(tfm, in_key, key_len);
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sctx->key_len = key_len;
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memcpy(sctx->key, in_key, key_len);
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return 0;
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}
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static int cbc_aes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
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struct blkcipher_walk *walk)
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static int cbc_aes_crypt(struct skcipher_request *req, unsigned long modifier)
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{
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struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes, n;
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int ret;
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struct {
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@ -381,134 +338,74 @@ static int cbc_aes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
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u8 key[AES_MAX_KEY_SIZE];
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} param;
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ret = blkcipher_walk_virt(desc, walk);
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memcpy(param.iv, walk->iv, AES_BLOCK_SIZE);
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if (unlikely(!sctx->fc))
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return fallback_skcipher_crypt(sctx, req, modifier);
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ret = skcipher_walk_virt(&walk, req, false);
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if (ret)
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return ret;
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memcpy(param.iv, walk.iv, AES_BLOCK_SIZE);
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memcpy(param.key, sctx->key, sctx->key_len);
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while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
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while ((nbytes = walk.nbytes) != 0) {
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/* only use complete blocks */
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n = nbytes & ~(AES_BLOCK_SIZE - 1);
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cpacf_kmc(sctx->fc | modifier, ¶m,
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walk->dst.virt.addr, walk->src.virt.addr, n);
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ret = blkcipher_walk_done(desc, walk, nbytes - n);
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walk.dst.virt.addr, walk.src.virt.addr, n);
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memcpy(walk.iv, param.iv, AES_BLOCK_SIZE);
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ret = skcipher_walk_done(&walk, nbytes - n);
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}
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memcpy(walk->iv, param.iv, AES_BLOCK_SIZE);
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return ret;
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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 s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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if (unlikely(!sctx->fc))
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return fallback_blk_enc(desc, dst, src, nbytes);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return cbc_aes_crypt(desc, 0, &walk);
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return cbc_aes_crypt(req, 0);
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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 s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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if (unlikely(!sctx->fc))
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return fallback_blk_dec(desc, dst, src, nbytes);
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return cbc_aes_crypt(desc, CPACF_DECRYPT, &walk);
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return cbc_aes_crypt(req, CPACF_DECRYPT);
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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-s390",
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.cra_priority = 402, /* ecb-aes-s390 + 1 */
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_NEED_FALLBACK,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct s390_aes_ctx),
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_init = fallback_init_blk,
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.cra_exit = fallback_exit_blk,
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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 = cbc_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-s390",
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.base.cra_priority = 402, /* ecb-aes-s390 + 1 */
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.base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct s390_aes_ctx),
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.base.cra_module = THIS_MODULE,
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.init = fallback_init_skcipher,
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.exit = fallback_exit_skcipher,
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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 = cbc_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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static int xts_fallback_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int len)
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static int xts_fallback_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int len)
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{
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struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
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unsigned int ret;
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||||
|
||||
crypto_sync_skcipher_clear_flags(xts_ctx->fallback,
|
||||
CRYPTO_TFM_REQ_MASK);
|
||||
crypto_sync_skcipher_set_flags(xts_ctx->fallback, tfm->crt_flags &
|
||||
CRYPTO_TFM_REQ_MASK);
|
||||
|
||||
ret = crypto_sync_skcipher_setkey(xts_ctx->fallback, key, len);
|
||||
|
||||
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
|
||||
tfm->crt_flags |= crypto_sync_skcipher_get_flags(xts_ctx->fallback) &
|
||||
CRYPTO_TFM_RES_MASK;
|
||||
struct s390_xts_ctx *xts_ctx = crypto_skcipher_ctx(tfm);
|
||||
int ret;
|
||||
|
||||
crypto_skcipher_clear_flags(xts_ctx->fallback, CRYPTO_TFM_REQ_MASK);
|
||||
crypto_skcipher_set_flags(xts_ctx->fallback,
|
||||
crypto_skcipher_get_flags(tfm) &
|
||||
CRYPTO_TFM_REQ_MASK);
|
||||
ret = crypto_skcipher_setkey(xts_ctx->fallback, key, len);
|
||||
crypto_skcipher_set_flags(tfm,
|
||||
crypto_skcipher_get_flags(xts_ctx->fallback) &
|
||||
CRYPTO_TFM_RES_MASK);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int xts_fallback_decrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct crypto_blkcipher *tfm = desc->tfm;
|
||||
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(tfm);
|
||||
SYNC_SKCIPHER_REQUEST_ON_STACK(req, xts_ctx->fallback);
|
||||
unsigned int ret;
|
||||
|
||||
skcipher_request_set_sync_tfm(req, xts_ctx->fallback);
|
||||
skcipher_request_set_callback(req, desc->flags, NULL, NULL);
|
||||
skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
|
||||
|
||||
ret = crypto_skcipher_decrypt(req);
|
||||
|
||||
skcipher_request_zero(req);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int xts_fallback_encrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct crypto_blkcipher *tfm = desc->tfm;
|
||||
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(tfm);
|
||||
SYNC_SKCIPHER_REQUEST_ON_STACK(req, xts_ctx->fallback);
|
||||
unsigned int ret;
|
||||
|
||||
skcipher_request_set_sync_tfm(req, xts_ctx->fallback);
|
||||
skcipher_request_set_callback(req, desc->flags, NULL, NULL);
|
||||
skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
|
||||
|
||||
ret = crypto_skcipher_encrypt(req);
|
||||
|
||||
skcipher_request_zero(req);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int xts_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
|
||||
static int xts_aes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
|
||||
unsigned int key_len)
|
||||
{
|
||||
struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
|
||||
struct s390_xts_ctx *xts_ctx = crypto_skcipher_ctx(tfm);
|
||||
unsigned long fc;
|
||||
int err;
|
||||
|
||||
@ -518,7 +415,7 @@ static int xts_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
|
||||
|
||||
/* In fips mode only 128 bit or 256 bit keys are valid */
|
||||
if (fips_enabled && key_len != 32 && key_len != 64) {
|
||||
tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
|
||||
crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
@ -539,10 +436,11 @@ static int xts_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int xts_aes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
|
||||
struct blkcipher_walk *walk)
|
||||
static int xts_aes_crypt(struct skcipher_request *req, unsigned long modifier)
|
||||
{
|
||||
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||||
struct s390_xts_ctx *xts_ctx = crypto_skcipher_ctx(tfm);
|
||||
struct skcipher_walk walk;
|
||||
unsigned int offset, nbytes, n;
|
||||
int ret;
|
||||
struct {
|
||||
@ -557,113 +455,100 @@ static int xts_aes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
|
||||
u8 init[16];
|
||||
} xts_param;
|
||||
|
||||
ret = blkcipher_walk_virt(desc, walk);
|
||||
if (req->cryptlen < AES_BLOCK_SIZE)
|
||||
return -EINVAL;
|
||||
|
||||
if (unlikely(!xts_ctx->fc || (req->cryptlen % AES_BLOCK_SIZE) != 0)) {
|
||||
struct skcipher_request *subreq = skcipher_request_ctx(req);
|
||||
|
||||
*subreq = *req;
|
||||
skcipher_request_set_tfm(subreq, xts_ctx->fallback);
|
||||
return (modifier & CPACF_DECRYPT) ?
|
||||
crypto_skcipher_decrypt(subreq) :
|
||||
crypto_skcipher_encrypt(subreq);
|
||||
}
|
||||
|
||||
ret = skcipher_walk_virt(&walk, req, false);
|
||||
if (ret)
|
||||
return ret;
|
||||
offset = xts_ctx->key_len & 0x10;
|
||||
memset(pcc_param.block, 0, sizeof(pcc_param.block));
|
||||
memset(pcc_param.bit, 0, sizeof(pcc_param.bit));
|
||||
memset(pcc_param.xts, 0, sizeof(pcc_param.xts));
|
||||
memcpy(pcc_param.tweak, walk->iv, sizeof(pcc_param.tweak));
|
||||
memcpy(pcc_param.tweak, walk.iv, sizeof(pcc_param.tweak));
|
||||
memcpy(pcc_param.key + offset, xts_ctx->pcc_key, xts_ctx->key_len);
|
||||
cpacf_pcc(xts_ctx->fc, pcc_param.key + offset);
|
||||
|
||||
memcpy(xts_param.key + offset, xts_ctx->key, xts_ctx->key_len);
|
||||
memcpy(xts_param.init, pcc_param.xts, 16);
|
||||
|
||||
while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
|
||||
while ((nbytes = walk.nbytes) != 0) {
|
||||
/* only use complete blocks */
|
||||
n = nbytes & ~(AES_BLOCK_SIZE - 1);
|
||||
cpacf_km(xts_ctx->fc | modifier, xts_param.key + offset,
|
||||
walk->dst.virt.addr, walk->src.virt.addr, n);
|
||||
ret = blkcipher_walk_done(desc, walk, nbytes - n);
|
||||
walk.dst.virt.addr, walk.src.virt.addr, n);
|
||||
ret = skcipher_walk_done(&walk, nbytes - n);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int xts_aes_encrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
static int xts_aes_encrypt(struct skcipher_request *req)
|
||||
{
|
||||
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
|
||||
if (!nbytes)
|
||||
return -EINVAL;
|
||||
|
||||
if (unlikely(!xts_ctx->fc || (nbytes % XTS_BLOCK_SIZE) != 0))
|
||||
return xts_fallback_encrypt(desc, dst, src, nbytes);
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
return xts_aes_crypt(desc, 0, &walk);
|
||||
return xts_aes_crypt(req, 0);
|
||||
}
|
||||
|
||||
static int xts_aes_decrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
static int xts_aes_decrypt(struct skcipher_request *req)
|
||||
{
|
||||
struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
|
||||
if (!nbytes)
|
||||
return -EINVAL;
|
||||
|
||||
if (unlikely(!xts_ctx->fc || (nbytes % XTS_BLOCK_SIZE) != 0))
|
||||
return xts_fallback_decrypt(desc, dst, src, nbytes);
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
return xts_aes_crypt(desc, CPACF_DECRYPT, &walk);
|
||||
return xts_aes_crypt(req, CPACF_DECRYPT);
|
||||
}
|
||||
|
||||
static int xts_fallback_init(struct crypto_tfm *tfm)
|
||||
static int xts_fallback_init(struct crypto_skcipher *tfm)
|
||||
{
|
||||
const char *name = tfm->__crt_alg->cra_name;
|
||||
struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
|
||||
const char *name = crypto_tfm_alg_name(&tfm->base);
|
||||
struct s390_xts_ctx *xts_ctx = crypto_skcipher_ctx(tfm);
|
||||
|
||||
xts_ctx->fallback = crypto_alloc_sync_skcipher(name, 0,
|
||||
CRYPTO_ALG_NEED_FALLBACK);
|
||||
xts_ctx->fallback = crypto_alloc_skcipher(name, 0,
|
||||
CRYPTO_ALG_NEED_FALLBACK | CRYPTO_ALG_ASYNC);
|
||||
|
||||
if (IS_ERR(xts_ctx->fallback)) {
|
||||
pr_err("Allocating XTS fallback algorithm %s failed\n",
|
||||
name);
|
||||
return PTR_ERR(xts_ctx->fallback);
|
||||
}
|
||||
crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
|
||||
crypto_skcipher_reqsize(xts_ctx->fallback));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void xts_fallback_exit(struct crypto_tfm *tfm)
|
||||
static void xts_fallback_exit(struct crypto_skcipher *tfm)
|
||||
{
|
||||
struct s390_xts_ctx *xts_ctx = crypto_tfm_ctx(tfm);
|
||||
struct s390_xts_ctx *xts_ctx = crypto_skcipher_ctx(tfm);
|
||||
|
||||
crypto_free_sync_skcipher(xts_ctx->fallback);
|
||||
crypto_free_skcipher(xts_ctx->fallback);
|
||||
}
|
||||
|
||||
static struct crypto_alg xts_aes_alg = {
|
||||
.cra_name = "xts(aes)",
|
||||
.cra_driver_name = "xts-aes-s390",
|
||||
.cra_priority = 402, /* ecb-aes-s390 + 1 */
|
||||
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||||
CRYPTO_ALG_NEED_FALLBACK,
|
||||
.cra_blocksize = AES_BLOCK_SIZE,
|
||||
.cra_ctxsize = sizeof(struct s390_xts_ctx),
|
||||
.cra_type = &crypto_blkcipher_type,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_init = xts_fallback_init,
|
||||
.cra_exit = xts_fallback_exit,
|
||||
.cra_u = {
|
||||
.blkcipher = {
|
||||
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
||||
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
.setkey = xts_aes_set_key,
|
||||
.encrypt = xts_aes_encrypt,
|
||||
.decrypt = xts_aes_decrypt,
|
||||
}
|
||||
}
|
||||
static struct skcipher_alg xts_aes_alg = {
|
||||
.base.cra_name = "xts(aes)",
|
||||
.base.cra_driver_name = "xts-aes-s390",
|
||||
.base.cra_priority = 402, /* ecb-aes-s390 + 1 */
|
||||
.base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
|
||||
.base.cra_blocksize = AES_BLOCK_SIZE,
|
||||
.base.cra_ctxsize = sizeof(struct s390_xts_ctx),
|
||||
.base.cra_module = THIS_MODULE,
|
||||
.init = xts_fallback_init,
|
||||
.exit = xts_fallback_exit,
|
||||
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
||||
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
.setkey = xts_aes_set_key,
|
||||
.encrypt = xts_aes_encrypt,
|
||||
.decrypt = xts_aes_decrypt,
|
||||
};
|
||||
|
||||
static int ctr_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
|
||||
static int ctr_aes_set_key(struct crypto_skcipher *tfm, const u8 *in_key,
|
||||
unsigned int key_len)
|
||||
{
|
||||
struct s390_aes_ctx *sctx = crypto_tfm_ctx(tfm);
|
||||
struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
|
||||
unsigned long fc;
|
||||
|
||||
/* Pick the correct function code based on the key length */
|
||||
@ -674,7 +559,7 @@ static int ctr_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
|
||||
/* Check if the function code is available */
|
||||
sctx->fc = (fc && cpacf_test_func(&kmctr_functions, fc)) ? fc : 0;
|
||||
if (!sctx->fc)
|
||||
return setkey_fallback_blk(tfm, in_key, key_len);
|
||||
return setkey_fallback_skcipher(tfm, in_key, key_len);
|
||||
|
||||
sctx->key_len = key_len;
|
||||
memcpy(sctx->key, in_key, key_len);
|
||||
@ -696,30 +581,34 @@ static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes)
|
||||
return n;
|
||||
}
|
||||
|
||||
static int ctr_aes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
|
||||
struct blkcipher_walk *walk)
|
||||
static int ctr_aes_crypt(struct skcipher_request *req)
|
||||
{
|
||||
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
|
||||
struct s390_aes_ctx *sctx = crypto_skcipher_ctx(tfm);
|
||||
u8 buf[AES_BLOCK_SIZE], *ctrptr;
|
||||
struct skcipher_walk walk;
|
||||
unsigned int n, nbytes;
|
||||
int ret, locked;
|
||||
|
||||
if (unlikely(!sctx->fc))
|
||||
return fallback_skcipher_crypt(sctx, req, 0);
|
||||
|
||||
locked = mutex_trylock(&ctrblk_lock);
|
||||
|
||||
ret = blkcipher_walk_virt_block(desc, walk, AES_BLOCK_SIZE);
|
||||
while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
|
||||
ret = skcipher_walk_virt(&walk, req, false);
|
||||
while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
|
||||
n = AES_BLOCK_SIZE;
|
||||
|
||||
if (nbytes >= 2*AES_BLOCK_SIZE && locked)
|
||||
n = __ctrblk_init(ctrblk, walk->iv, nbytes);
|
||||
ctrptr = (n > AES_BLOCK_SIZE) ? ctrblk : walk->iv;
|
||||
cpacf_kmctr(sctx->fc | modifier, sctx->key,
|
||||
walk->dst.virt.addr, walk->src.virt.addr,
|
||||
n, ctrptr);
|
||||
n = __ctrblk_init(ctrblk, walk.iv, nbytes);
|
||||
ctrptr = (n > AES_BLOCK_SIZE) ? ctrblk : walk.iv;
|
||||
cpacf_kmctr(sctx->fc, sctx->key, walk.dst.virt.addr,
|
||||
walk.src.virt.addr, n, ctrptr);
|
||||
if (ctrptr == ctrblk)
|
||||
memcpy(walk->iv, ctrptr + n - AES_BLOCK_SIZE,
|
||||
memcpy(walk.iv, ctrptr + n - AES_BLOCK_SIZE,
|
||||
AES_BLOCK_SIZE);
|
||||
crypto_inc(walk->iv, AES_BLOCK_SIZE);
|
||||
ret = blkcipher_walk_done(desc, walk, nbytes - n);
|
||||
crypto_inc(walk.iv, AES_BLOCK_SIZE);
|
||||
ret = skcipher_walk_done(&walk, nbytes - n);
|
||||
}
|
||||
if (locked)
|
||||
mutex_unlock(&ctrblk_lock);
|
||||
@ -727,67 +616,33 @@ static int ctr_aes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
|
||||
* final block may be < AES_BLOCK_SIZE, copy only nbytes
|
||||
*/
|
||||
if (nbytes) {
|
||||
cpacf_kmctr(sctx->fc | modifier, sctx->key,
|
||||
buf, walk->src.virt.addr,
|
||||
AES_BLOCK_SIZE, walk->iv);
|
||||
memcpy(walk->dst.virt.addr, buf, nbytes);
|
||||
crypto_inc(walk->iv, AES_BLOCK_SIZE);
|
||||
ret = blkcipher_walk_done(desc, walk, 0);
|
||||
cpacf_kmctr(sctx->fc, sctx->key, buf, walk.src.virt.addr,
|
||||
AES_BLOCK_SIZE, walk.iv);
|
||||
memcpy(walk.dst.virt.addr, buf, nbytes);
|
||||
crypto_inc(walk.iv, AES_BLOCK_SIZE);
|
||||
ret = skcipher_walk_done(&walk, 0);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ctr_aes_encrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
|
||||
if (unlikely(!sctx->fc))
|
||||
return fallback_blk_enc(desc, dst, src, nbytes);
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
return ctr_aes_crypt(desc, 0, &walk);
|
||||
}
|
||||
|
||||
static int ctr_aes_decrypt(struct blkcipher_desc *desc,
|
||||
struct scatterlist *dst, struct scatterlist *src,
|
||||
unsigned int nbytes)
|
||||
{
|
||||
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
|
||||
struct blkcipher_walk walk;
|
||||
|
||||
if (unlikely(!sctx->fc))
|
||||
return fallback_blk_dec(desc, dst, src, nbytes);
|
||||
|
||||
blkcipher_walk_init(&walk, dst, src, nbytes);
|
||||
return ctr_aes_crypt(desc, CPACF_DECRYPT, &walk);
|
||||
}
|
||||
|
||||
static struct crypto_alg ctr_aes_alg = {
|
||||
.cra_name = "ctr(aes)",
|
||||
.cra_driver_name = "ctr-aes-s390",
|
||||
.cra_priority = 402, /* ecb-aes-s390 + 1 */
|
||||
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
||||
CRYPTO_ALG_NEED_FALLBACK,
|
||||
.cra_blocksize = 1,
|
||||
.cra_ctxsize = sizeof(struct s390_aes_ctx),
|
||||
.cra_type = &crypto_blkcipher_type,
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_init = fallback_init_blk,
|
||||
.cra_exit = fallback_exit_blk,
|
||||
.cra_u = {
|
||||
.blkcipher = {
|
||||
.min_keysize = AES_MIN_KEY_SIZE,
|
||||
.max_keysize = AES_MAX_KEY_SIZE,
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
.setkey = ctr_aes_set_key,
|
||||
.encrypt = ctr_aes_encrypt,
|
||||
.decrypt = ctr_aes_decrypt,
|
||||
}
|
||||
}
|
||||
static struct skcipher_alg ctr_aes_alg = {
|
||||
.base.cra_name = "ctr(aes)",
|
||||
.base.cra_driver_name = "ctr-aes-s390",
|
||||
.base.cra_priority = 402, /* ecb-aes-s390 + 1 */
|
||||
.base.cra_flags = CRYPTO_ALG_NEED_FALLBACK,
|
||||
.base.cra_blocksize = 1,
|
||||
.base.cra_ctxsize = sizeof(struct s390_aes_ctx),
|
||||
.base.cra_module = THIS_MODULE,
|
||||
.init = fallback_init_skcipher,
|
||||
.exit = fallback_exit_skcipher,
|
||||
.min_keysize = AES_MIN_KEY_SIZE,
|
||||
.max_keysize = AES_MAX_KEY_SIZE,
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
.setkey = ctr_aes_set_key,
|
||||
.encrypt = ctr_aes_crypt,
|
||||
.decrypt = ctr_aes_crypt,
|
||||
.chunksize = AES_BLOCK_SIZE,
|
||||
};
|
||||
|
||||
static int gcm_aes_setkey(struct crypto_aead *tfm, const u8 *key,
|
||||
@ -1116,24 +971,27 @@ static struct aead_alg gcm_aes_aead = {
|
||||
},
|
||||
};
|
||||
|
||||
static struct crypto_alg *aes_s390_algs_ptr[5];
|
||||
static int aes_s390_algs_num;
|
||||
static struct crypto_alg *aes_s390_alg;
|
||||
static struct skcipher_alg *aes_s390_skcipher_algs[4];
|
||||
static int aes_s390_skciphers_num;
|
||||
static struct aead_alg *aes_s390_aead_alg;
|
||||
|
||||
static int aes_s390_register_alg(struct crypto_alg *alg)
|
||||
static int aes_s390_register_skcipher(struct skcipher_alg *alg)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = crypto_register_alg(alg);
|
||||
ret = crypto_register_skcipher(alg);
|
||||
if (!ret)
|
||||
aes_s390_algs_ptr[aes_s390_algs_num++] = alg;
|
||||
aes_s390_skcipher_algs[aes_s390_skciphers_num++] = alg;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void aes_s390_fini(void)
|
||||
{
|
||||
while (aes_s390_algs_num--)
|
||||
crypto_unregister_alg(aes_s390_algs_ptr[aes_s390_algs_num]);
|
||||
if (aes_s390_alg)
|
||||
crypto_unregister_alg(aes_s390_alg);
|
||||
while (aes_s390_skciphers_num--)
|
||||
crypto_unregister_skcipher(aes_s390_skcipher_algs[aes_s390_skciphers_num]);
|
||||
if (ctrblk)
|
||||
free_page((unsigned long) ctrblk);
|
||||
|
||||
@ -1154,10 +1012,11 @@ static int __init aes_s390_init(void)
|
||||
if (cpacf_test_func(&km_functions, CPACF_KM_AES_128) ||
|
||||
cpacf_test_func(&km_functions, CPACF_KM_AES_192) ||
|
||||
cpacf_test_func(&km_functions, CPACF_KM_AES_256)) {
|
||||
ret = aes_s390_register_alg(&aes_alg);
|
||||
ret = crypto_register_alg(&aes_alg);
|
||||
if (ret)
|
||||
goto out_err;
|
||||
ret = aes_s390_register_alg(&ecb_aes_alg);
|
||||
aes_s390_alg = &aes_alg;
|
||||
ret = aes_s390_register_skcipher(&ecb_aes_alg);
|
||||
if (ret)
|
||||
goto out_err;
|
||||
}
|
||||
@ -1165,14 +1024,14 @@ static int __init aes_s390_init(void)
|
||||
if (cpacf_test_func(&kmc_functions, CPACF_KMC_AES_128) ||
|
||||
cpacf_test_func(&kmc_functions, CPACF_KMC_AES_192) ||
|
||||
cpacf_test_func(&kmc_functions, CPACF_KMC_AES_256)) {
|
||||
ret = aes_s390_register_alg(&cbc_aes_alg);
|
||||
ret = aes_s390_register_skcipher(&cbc_aes_alg);
|
||||
if (ret)
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
if (cpacf_test_func(&km_functions, CPACF_KM_XTS_128) ||
|
||||
cpacf_test_func(&km_functions, CPACF_KM_XTS_256)) {
|
||||
ret = aes_s390_register_alg(&xts_aes_alg);
|
||||
ret = aes_s390_register_skcipher(&xts_aes_alg);
|
||||
if (ret)
|
||||
goto out_err;
|
||||
}
|
||||
@ -1185,7 +1044,7 @@ static int __init aes_s390_init(void)
|
||||
ret = -ENOMEM;
|
||||
goto out_err;
|
||||
}
|
||||
ret = aes_s390_register_alg(&ctr_aes_alg);
|
||||
ret = aes_s390_register_skcipher(&ctr_aes_alg);
|
||||
if (ret)
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user