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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
commit8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch)
treee9891aa6c295060d065adffd610c4f49ecf884f3 /arch/arm64/crypto/aes-ce-ccm-glue.c
parenta71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff)
Linux-libre 4.3.2-gnu
Diffstat (limited to 'arch/arm64/crypto/aes-ce-ccm-glue.c')
-rw-r--r--arch/arm64/crypto/aes-ce-ccm-glue.c68
1 files changed, 42 insertions, 26 deletions
diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c
index 3303e8a7b..f4bf2f2a0 100644
--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
+++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
@@ -124,7 +124,7 @@ static void ccm_calculate_auth_mac(struct aead_request *req, u8 mac[])
ce_aes_ccm_auth_data(mac, (u8 *)&ltag, ltag.len, &macp, ctx->key_enc,
num_rounds(ctx));
- scatterwalk_start(&walk, req->assoc);
+ scatterwalk_start(&walk, req->src);
do {
u32 n = scatterwalk_clamp(&walk, len);
@@ -151,6 +151,10 @@ static int ccm_encrypt(struct aead_request *req)
struct crypto_aes_ctx *ctx = crypto_aead_ctx(aead);
struct blkcipher_desc desc = { .info = req->iv };
struct blkcipher_walk walk;
+ struct scatterlist srcbuf[2];
+ struct scatterlist dstbuf[2];
+ struct scatterlist *src;
+ struct scatterlist *dst;
u8 __aligned(8) mac[AES_BLOCK_SIZE];
u8 buf[AES_BLOCK_SIZE];
u32 len = req->cryptlen;
@@ -168,7 +172,12 @@ static int ccm_encrypt(struct aead_request *req)
/* preserve the original iv for the final round */
memcpy(buf, req->iv, AES_BLOCK_SIZE);
- blkcipher_walk_init(&walk, req->dst, req->src, len);
+ src = scatterwalk_ffwd(srcbuf, req->src, req->assoclen);
+ dst = src;
+ if (req->src != req->dst)
+ dst = scatterwalk_ffwd(dstbuf, req->dst, req->assoclen);
+
+ blkcipher_walk_init(&walk, dst, src, len);
err = blkcipher_aead_walk_virt_block(&desc, &walk, aead,
AES_BLOCK_SIZE);
@@ -194,7 +203,7 @@ static int ccm_encrypt(struct aead_request *req)
return err;
/* copy authtag to end of dst */
- scatterwalk_map_and_copy(mac, req->dst, req->cryptlen,
+ scatterwalk_map_and_copy(mac, dst, req->cryptlen,
crypto_aead_authsize(aead), 1);
return 0;
@@ -207,6 +216,10 @@ static int ccm_decrypt(struct aead_request *req)
unsigned int authsize = crypto_aead_authsize(aead);
struct blkcipher_desc desc = { .info = req->iv };
struct blkcipher_walk walk;
+ struct scatterlist srcbuf[2];
+ struct scatterlist dstbuf[2];
+ struct scatterlist *src;
+ struct scatterlist *dst;
u8 __aligned(8) mac[AES_BLOCK_SIZE];
u8 buf[AES_BLOCK_SIZE];
u32 len = req->cryptlen - authsize;
@@ -224,7 +237,12 @@ static int ccm_decrypt(struct aead_request *req)
/* preserve the original iv for the final round */
memcpy(buf, req->iv, AES_BLOCK_SIZE);
- blkcipher_walk_init(&walk, req->dst, req->src, len);
+ src = scatterwalk_ffwd(srcbuf, req->src, req->assoclen);
+ dst = src;
+ if (req->src != req->dst)
+ dst = scatterwalk_ffwd(dstbuf, req->dst, req->assoclen);
+
+ blkcipher_walk_init(&walk, dst, src, len);
err = blkcipher_aead_walk_virt_block(&desc, &walk, aead,
AES_BLOCK_SIZE);
@@ -250,44 +268,42 @@ static int ccm_decrypt(struct aead_request *req)
return err;
/* compare calculated auth tag with the stored one */
- scatterwalk_map_and_copy(buf, req->src, req->cryptlen - authsize,
+ scatterwalk_map_and_copy(buf, src, req->cryptlen - authsize,
authsize, 0);
- if (memcmp(mac, buf, authsize))
+ if (crypto_memneq(mac, buf, authsize))
return -EBADMSG;
return 0;
}
-static struct crypto_alg ccm_aes_alg = {
- .cra_name = "ccm(aes)",
- .cra_driver_name = "ccm-aes-ce",
- .cra_priority = 300,
- .cra_flags = CRYPTO_ALG_TYPE_AEAD,
- .cra_blocksize = 1,
- .cra_ctxsize = sizeof(struct crypto_aes_ctx),
- .cra_alignmask = 7,
- .cra_type = &crypto_aead_type,
- .cra_module = THIS_MODULE,
- .cra_aead = {
- .ivsize = AES_BLOCK_SIZE,
- .maxauthsize = AES_BLOCK_SIZE,
- .setkey = ccm_setkey,
- .setauthsize = ccm_setauthsize,
- .encrypt = ccm_encrypt,
- .decrypt = ccm_decrypt,
- }
+static struct aead_alg ccm_aes_alg = {
+ .base = {
+ .cra_name = "ccm(aes)",
+ .cra_driver_name = "ccm-aes-ce",
+ .cra_priority = 300,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct crypto_aes_ctx),
+ .cra_alignmask = 7,
+ .cra_module = THIS_MODULE,
+ },
+ .ivsize = AES_BLOCK_SIZE,
+ .maxauthsize = AES_BLOCK_SIZE,
+ .setkey = ccm_setkey,
+ .setauthsize = ccm_setauthsize,
+ .encrypt = ccm_encrypt,
+ .decrypt = ccm_decrypt,
};
static int __init aes_mod_init(void)
{
if (!(elf_hwcap & HWCAP_AES))
return -ENODEV;
- return crypto_register_alg(&ccm_aes_alg);
+ return crypto_register_aead(&ccm_aes_alg);
}
static void __exit aes_mod_exit(void)
{
- crypto_unregister_alg(&ccm_aes_alg);
+ crypto_unregister_aead(&ccm_aes_alg);
}
module_init(aes_mod_init);