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-rw-r--r--arch/x86/crypto/chacha20_glue.c69
-rw-r--r--crypto/chacha20_generic.c73
-rw-r--r--include/crypto/chacha20.h6
3 files changed, 64 insertions, 84 deletions
diff --git a/arch/x86/crypto/chacha20_glue.c b/arch/x86/crypto/chacha20_glue.c
index f910d1d..78f75b0 100644
--- a/arch/x86/crypto/chacha20_glue.c
+++ b/arch/x86/crypto/chacha20_glue.c
@@ -11,7 +11,7 @@
#include <crypto/algapi.h>
#include <crypto/chacha20.h>
-#include <linux/crypto.h>
+#include <crypto/internal/skcipher.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/fpu/api.h>
@@ -63,36 +63,34 @@ static void chacha20_dosimd(u32 *state, u8 *dst, const u8 *src,
}
}
-static int chacha20_simd(struct blkcipher_desc *desc, struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+static int chacha20_simd(struct skcipher_request *req)
{
- u32 *state, state_buf[16 + (CHACHA20_STATE_ALIGN / sizeof(u32)) - 1];
- struct blkcipher_walk walk;
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct chacha20_ctx *ctx = crypto_skcipher_ctx(tfm);
+ u32 state[16] __aligned(CHACHA20_STATE_ALIGN);
+ struct skcipher_walk walk;
int err;
- if (nbytes <= CHACHA20_BLOCK_SIZE || !may_use_simd())
- return crypto_chacha20_crypt(desc, dst, src, nbytes);
+ if (req->cryptlen <= CHACHA20_BLOCK_SIZE || !may_use_simd())
+ return crypto_chacha20_crypt(req);
- state = (u32 *)roundup((uintptr_t)state_buf, CHACHA20_STATE_ALIGN);
+ err = skcipher_walk_virt(&walk, req, true);
- blkcipher_walk_init(&walk, dst, src, nbytes);
- err = blkcipher_walk_virt_block(desc, &walk, CHACHA20_BLOCK_SIZE);
-
- crypto_chacha20_init(state, crypto_blkcipher_ctx(desc->tfm), walk.iv);
+ crypto_chacha20_init(state, ctx, walk.iv);
kernel_fpu_begin();
while (walk.nbytes >= CHACHA20_BLOCK_SIZE) {
chacha20_dosimd(state, walk.dst.virt.addr, walk.src.virt.addr,
rounddown(walk.nbytes, CHACHA20_BLOCK_SIZE));
- err = blkcipher_walk_done(desc, &walk,
- walk.nbytes % CHACHA20_BLOCK_SIZE);
+ err = skcipher_walk_done(&walk,
+ walk.nbytes % CHACHA20_BLOCK_SIZE);
}
if (walk.nbytes) {
chacha20_dosimd(state, walk.dst.virt.addr, walk.src.virt.addr,
walk.nbytes);
- err = blkcipher_walk_done(desc, &walk, 0);
+ err = skcipher_walk_done(&walk, 0);
}
kernel_fpu_end();
@@ -100,27 +98,22 @@ static int chacha20_simd(struct blkcipher_desc *desc, struct scatterlist *dst,
return err;
}
-static struct crypto_alg alg = {
- .cra_name = "chacha20",
- .cra_driver_name = "chacha20-simd",
- .cra_priority = 300,
- .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
- .cra_blocksize = 1,
- .cra_type = &crypto_blkcipher_type,
- .cra_ctxsize = sizeof(struct chacha20_ctx),
- .cra_alignmask = sizeof(u32) - 1,
- .cra_module = THIS_MODULE,
- .cra_u = {
- .blkcipher = {
- .min_keysize = CHACHA20_KEY_SIZE,
- .max_keysize = CHACHA20_KEY_SIZE,
- .ivsize = CHACHA20_IV_SIZE,
- .geniv = "seqiv",
- .setkey = crypto_chacha20_setkey,
- .encrypt = chacha20_simd,
- .decrypt = chacha20_simd,
- },
- },
+static struct skcipher_alg alg = {
+ .base.cra_name = "chacha20",
+ .base.cra_driver_name = "chacha20-simd",
+ .base.cra_priority = 300,
+ .base.cra_blocksize = 1,
+ .base.cra_ctxsize = sizeof(struct chacha20_ctx),
+ .base.cra_alignmask = sizeof(u32) - 1,
+ .base.cra_module = THIS_MODULE,
+
+ .min_keysize = CHACHA20_KEY_SIZE,
+ .max_keysize = CHACHA20_KEY_SIZE,
+ .ivsize = CHACHA20_IV_SIZE,
+ .chunksize = CHACHA20_BLOCK_SIZE,
+ .setkey = crypto_chacha20_setkey,
+ .encrypt = chacha20_simd,
+ .decrypt = chacha20_simd,
};
static int __init chacha20_simd_mod_init(void)
@@ -133,12 +126,12 @@ static int __init chacha20_simd_mod_init(void)
boot_cpu_has(X86_FEATURE_AVX2) &&
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
#endif
- return crypto_register_alg(&alg);
+ return crypto_register_skcipher(&alg);
}
static void __exit chacha20_simd_mod_fini(void)
{
- crypto_unregister_alg(&alg);
+ crypto_unregister_skcipher(&alg);
}
module_init(chacha20_simd_mod_init);
diff --git a/crypto/chacha20_generic.c b/crypto/chacha20_generic.c
index 1cab831..8b3c04d 100644
--- a/crypto/chacha20_generic.c
+++ b/crypto/chacha20_generic.c
@@ -10,10 +10,9 @@
*/
#include <crypto/algapi.h>
-#include <linux/crypto.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
#include <crypto/chacha20.h>
+#include <crypto/internal/skcipher.h>
+#include <linux/module.h>
static inline u32 le32_to_cpuvp(const void *p)
{
@@ -63,10 +62,10 @@ void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv)
}
EXPORT_SYMBOL_GPL(crypto_chacha20_init);
-int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key,
+int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
unsigned int keysize)
{
- struct chacha20_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct chacha20_ctx *ctx = crypto_skcipher_ctx(tfm);
int i;
if (keysize != CHACHA20_KEY_SIZE)
@@ -79,66 +78,54 @@ int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key,
}
EXPORT_SYMBOL_GPL(crypto_chacha20_setkey);
-int crypto_chacha20_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes)
+int crypto_chacha20_crypt(struct skcipher_request *req)
{
- struct blkcipher_walk walk;
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct chacha20_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
u32 state[16];
int err;
- blkcipher_walk_init(&walk, dst, src, nbytes);
- err = blkcipher_walk_virt_block(desc, &walk, CHACHA20_BLOCK_SIZE);
-
- crypto_chacha20_init(state, crypto_blkcipher_ctx(desc->tfm), walk.iv);
+ err = skcipher_walk_virt(&walk, req, true);
- while (walk.nbytes >= CHACHA20_BLOCK_SIZE) {
- chacha20_docrypt(state, walk.dst.virt.addr, walk.src.virt.addr,
- rounddown(walk.nbytes, CHACHA20_BLOCK_SIZE));
- err = blkcipher_walk_done(desc, &walk,
- walk.nbytes % CHACHA20_BLOCK_SIZE);
- }
+ crypto_chacha20_init(state, ctx, walk.iv);
- if (walk.nbytes) {
+ while (walk.nbytes > 0) {
chacha20_docrypt(state, walk.dst.virt.addr, walk.src.virt.addr,
walk.nbytes);
- err = blkcipher_walk_done(desc, &walk, 0);
+ err = skcipher_walk_done(&walk, 0);
}
return err;
}
EXPORT_SYMBOL_GPL(crypto_chacha20_crypt);
-static struct crypto_alg alg = {
- .cra_name = "chacha20",
- .cra_driver_name = "chacha20-generic",
- .cra_priority = 100,
- .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
- .cra_blocksize = 1,
- .cra_type = &crypto_blkcipher_type,
- .cra_ctxsize = sizeof(struct chacha20_ctx),
- .cra_alignmask = sizeof(u32) - 1,
- .cra_module = THIS_MODULE,
- .cra_u = {
- .blkcipher = {
- .min_keysize = CHACHA20_KEY_SIZE,
- .max_keysize = CHACHA20_KEY_SIZE,
- .ivsize = CHACHA20_IV_SIZE,
- .geniv = "seqiv",
- .setkey = crypto_chacha20_setkey,
- .encrypt = crypto_chacha20_crypt,
- .decrypt = crypto_chacha20_crypt,
- },
- },
+static struct skcipher_alg alg = {
+ .base.cra_name = "chacha20",
+ .base.cra_driver_name = "chacha20-generic",
+ .base.cra_priority = 100,
+ .base.cra_blocksize = 1,
+ .base.cra_ctxsize = sizeof(struct chacha20_ctx),
+ .base.cra_alignmask = sizeof(u32) - 1,
+ .base.cra_module = THIS_MODULE,
+
+ .min_keysize = CHACHA20_KEY_SIZE,
+ .max_keysize = CHACHA20_KEY_SIZE,
+ .ivsize = CHACHA20_IV_SIZE,
+ .chunksize = CHACHA20_BLOCK_SIZE,
+ .setkey = crypto_chacha20_setkey,
+ .encrypt = crypto_chacha20_crypt,
+ .decrypt = crypto_chacha20_crypt,
};
static int __init chacha20_generic_mod_init(void)
{
- return crypto_register_alg(&alg);
+ return crypto_register_skcipher(&alg);
}
static void __exit chacha20_generic_mod_fini(void)
{
- crypto_unregister_alg(&alg);
+ crypto_unregister_skcipher(&alg);
}
module_init(chacha20_generic_mod_init);
diff --git a/include/crypto/chacha20.h b/include/crypto/chacha20.h
index 20d20f68..445fc45 100644
--- a/include/crypto/chacha20.h
+++ b/include/crypto/chacha20.h
@@ -5,6 +5,7 @@
#ifndef _CRYPTO_CHACHA20_H
#define _CRYPTO_CHACHA20_H
+#include <crypto/skcipher.h>
#include <linux/types.h>
#include <linux/crypto.h>
@@ -18,9 +19,8 @@ struct chacha20_ctx {
void chacha20_block(u32 *state, void *stream);
void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv);
-int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key,
+int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
unsigned int keysize);
-int crypto_chacha20_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
- struct scatterlist *src, unsigned int nbytes);
+int crypto_chacha20_crypt(struct skcipher_request *req);
#endif
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