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author | Herbert Xu <herbert@gondor.apana.org.au> | 2015-07-14 10:53:19 +0200 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-07-17 15:20:10 +0200 |
commit | 2642d6abca9bc3404b7b967914300169135dcd31 (patch) | |
tree | c76630e2663decadb1e9d57b3bc9770e59c80016 /arch/arm64/crypto | |
parent | crypto: ccm - Convert to new AEAD interface (diff) | |
download | linux-2642d6abca9bc3404b7b967914300169135dcd31.tar.xz linux-2642d6abca9bc3404b7b967914300169135dcd31.zip |
crypto: aes-ce-ccm - Convert to new AEAD interface
This patch converts the ARM64 aes-ce-ccm implementation to the
new AEAD interface.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Diffstat (limited to 'arch/arm64/crypto')
-rw-r--r-- | arch/arm64/crypto/aes-ce-ccm-glue.c | 69 |
1 files changed, 43 insertions, 26 deletions
diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c index 3303e8a7b837..f3690fa76a5b 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 *)<ag, 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 +268,43 @@ 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_flags = CRYPTO_ALG_AEAD_NEW, + .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); |