diff options
Diffstat (limited to 'arch/arm64/crypto/aes-glue.c')
| -rw-r--r-- | arch/arm64/crypto/aes-glue.c | 726 |
1 files changed, 726 insertions, 0 deletions
diff --git a/arch/arm64/crypto/aes-glue.c b/arch/arm64/crypto/aes-glue.c new file mode 100644 index 000000000..85497cfe7 --- /dev/null +++ b/arch/arm64/crypto/aes-glue.c @@ -0,0 +1,726 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/arch/arm64/crypto/aes-glue.c - wrapper code for ARMv8 AES + * + * Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org> + */ + +#include <crypto/aes.h> +#include <crypto/ctr.h> +#include <crypto/internal/skcipher.h> +#include <crypto/scatterwalk.h> +#include <crypto/sha2.h> +#include <crypto/utils.h> +#include <crypto/xts.h> +#include <linux/cpufeature.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> + +#include <asm/hwcap.h> +#include <asm/simd.h> + +#ifdef USE_V8_CRYPTO_EXTENSIONS +#define MODE "ce" +#define PRIO 300 +#define aes_expandkey ce_aes_expandkey +#define aes_ecb_encrypt ce_aes_ecb_encrypt +#define aes_ecb_decrypt ce_aes_ecb_decrypt +#define aes_cbc_encrypt ce_aes_cbc_encrypt +#define aes_cbc_decrypt ce_aes_cbc_decrypt +#define aes_cbc_cts_encrypt ce_aes_cbc_cts_encrypt +#define aes_cbc_cts_decrypt ce_aes_cbc_cts_decrypt +#define aes_essiv_cbc_encrypt ce_aes_essiv_cbc_encrypt +#define aes_essiv_cbc_decrypt ce_aes_essiv_cbc_decrypt +#define aes_ctr_encrypt ce_aes_ctr_encrypt +#define aes_xctr_encrypt ce_aes_xctr_encrypt +#define aes_xts_encrypt ce_aes_xts_encrypt +#define aes_xts_decrypt ce_aes_xts_decrypt +MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS/XCTR using ARMv8 Crypto Extensions"); +#else +#define MODE "neon" +#define PRIO 200 +#define aes_ecb_encrypt neon_aes_ecb_encrypt +#define aes_ecb_decrypt neon_aes_ecb_decrypt +#define aes_cbc_encrypt neon_aes_cbc_encrypt +#define aes_cbc_decrypt neon_aes_cbc_decrypt +#define aes_cbc_cts_encrypt neon_aes_cbc_cts_encrypt +#define aes_cbc_cts_decrypt neon_aes_cbc_cts_decrypt +#define aes_essiv_cbc_encrypt neon_aes_essiv_cbc_encrypt +#define aes_essiv_cbc_decrypt neon_aes_essiv_cbc_decrypt +#define aes_ctr_encrypt neon_aes_ctr_encrypt +#define aes_xctr_encrypt neon_aes_xctr_encrypt +#define aes_xts_encrypt neon_aes_xts_encrypt +#define aes_xts_decrypt neon_aes_xts_decrypt +MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS/XCTR using ARMv8 NEON"); +#endif +#if defined(USE_V8_CRYPTO_EXTENSIONS) || !IS_ENABLED(CONFIG_CRYPTO_AES_ARM64_BS) +MODULE_ALIAS_CRYPTO("ecb(aes)"); +MODULE_ALIAS_CRYPTO("cbc(aes)"); +MODULE_ALIAS_CRYPTO("ctr(aes)"); +MODULE_ALIAS_CRYPTO("xts(aes)"); +MODULE_ALIAS_CRYPTO("xctr(aes)"); +#endif +MODULE_ALIAS_CRYPTO("cts(cbc(aes))"); +MODULE_ALIAS_CRYPTO("essiv(cbc(aes),sha256)"); + +MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); +MODULE_IMPORT_NS("CRYPTO_INTERNAL"); +MODULE_LICENSE("GPL v2"); + +struct crypto_aes_xts_ctx { + struct crypto_aes_ctx key1; + struct crypto_aes_ctx __aligned(8) key2; +}; + +struct crypto_aes_essiv_cbc_ctx { + struct crypto_aes_ctx key1; + struct crypto_aes_ctx __aligned(8) key2; +}; + +static int skcipher_aes_setkey(struct crypto_skcipher *tfm, const u8 *in_key, + unsigned int key_len) +{ + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + + return aes_expandkey(ctx, in_key, key_len); +} + +static int __maybe_unused xts_set_key(struct crypto_skcipher *tfm, + const u8 *in_key, unsigned int key_len) +{ + struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm); + int ret; + + ret = xts_verify_key(tfm, in_key, key_len); + if (ret) + return ret; + + ret = aes_expandkey(&ctx->key1, in_key, key_len / 2); + if (!ret) + ret = aes_expandkey(&ctx->key2, &in_key[key_len / 2], + key_len / 2); + return ret; +} + +static int __maybe_unused essiv_cbc_set_key(struct crypto_skcipher *tfm, + const u8 *in_key, + unsigned int key_len) +{ + struct crypto_aes_essiv_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); + u8 digest[SHA256_DIGEST_SIZE]; + int ret; + + ret = aes_expandkey(&ctx->key1, in_key, key_len); + if (ret) + return ret; + + sha256(in_key, key_len, digest); + + return aes_expandkey(&ctx->key2, digest, sizeof(digest)); +} + +static int __maybe_unused ecb_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key_length / 4; + struct skcipher_walk walk; + unsigned int blocks; + + err = skcipher_walk_virt(&walk, req, false); + + while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { + scoped_ksimd() + aes_ecb_encrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key_enc, rounds, blocks); + err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); + } + return err; +} + +static int __maybe_unused ecb_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key_length / 4; + struct skcipher_walk walk; + unsigned int blocks; + + err = skcipher_walk_virt(&walk, req, false); + + while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { + scoped_ksimd() + aes_ecb_decrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key_dec, rounds, blocks); + err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); + } + return err; +} + +static int cbc_encrypt_walk(struct skcipher_request *req, + struct skcipher_walk *walk) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err = 0, rounds = 6 + ctx->key_length / 4; + unsigned int blocks; + + while ((blocks = (walk->nbytes / AES_BLOCK_SIZE))) { + scoped_ksimd() + aes_cbc_encrypt(walk->dst.virt.addr, walk->src.virt.addr, + ctx->key_enc, rounds, blocks, walk->iv); + err = skcipher_walk_done(walk, walk->nbytes % AES_BLOCK_SIZE); + } + return err; +} + +static int __maybe_unused cbc_encrypt(struct skcipher_request *req) +{ + struct skcipher_walk walk; + int err; + + err = skcipher_walk_virt(&walk, req, false); + if (err) + return err; + return cbc_encrypt_walk(req, &walk); +} + +static int cbc_decrypt_walk(struct skcipher_request *req, + struct skcipher_walk *walk) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err = 0, rounds = 6 + ctx->key_length / 4; + unsigned int blocks; + + while ((blocks = (walk->nbytes / AES_BLOCK_SIZE))) { + scoped_ksimd() + aes_cbc_decrypt(walk->dst.virt.addr, walk->src.virt.addr, + ctx->key_dec, rounds, blocks, walk->iv); + err = skcipher_walk_done(walk, walk->nbytes % AES_BLOCK_SIZE); + } + return err; +} + +static int __maybe_unused cbc_decrypt(struct skcipher_request *req) +{ + struct skcipher_walk walk; + int err; + + err = skcipher_walk_virt(&walk, req, false); + if (err) + return err; + return cbc_decrypt_walk(req, &walk); +} + +static int cts_cbc_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key_length / 4; + int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; + struct scatterlist *src = req->src, *dst = req->dst; + struct scatterlist sg_src[2], sg_dst[2]; + struct skcipher_request subreq; + struct skcipher_walk walk; + + skcipher_request_set_tfm(&subreq, tfm); + skcipher_request_set_callback(&subreq, skcipher_request_flags(req), + NULL, NULL); + + if (req->cryptlen <= AES_BLOCK_SIZE) { + if (req->cryptlen < AES_BLOCK_SIZE) + return -EINVAL; + cbc_blocks = 1; + } + + if (cbc_blocks > 0) { + skcipher_request_set_crypt(&subreq, req->src, req->dst, + cbc_blocks * AES_BLOCK_SIZE, + req->iv); + + err = skcipher_walk_virt(&walk, &subreq, false) ?: + cbc_encrypt_walk(&subreq, &walk); + if (err) + return err; + + if (req->cryptlen == AES_BLOCK_SIZE) + return 0; + + dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen); + if (req->dst != req->src) + dst = scatterwalk_ffwd(sg_dst, req->dst, + subreq.cryptlen); + } + + /* handle ciphertext stealing */ + skcipher_request_set_crypt(&subreq, src, dst, + req->cryptlen - cbc_blocks * AES_BLOCK_SIZE, + req->iv); + + err = skcipher_walk_virt(&walk, &subreq, false); + if (err) + return err; + + scoped_ksimd() + aes_cbc_cts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key_enc, rounds, walk.nbytes, walk.iv); + + return skcipher_walk_done(&walk, 0); +} + +static int cts_cbc_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key_length / 4; + int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; + struct scatterlist *src = req->src, *dst = req->dst; + struct scatterlist sg_src[2], sg_dst[2]; + struct skcipher_request subreq; + struct skcipher_walk walk; + + skcipher_request_set_tfm(&subreq, tfm); + skcipher_request_set_callback(&subreq, skcipher_request_flags(req), + NULL, NULL); + + if (req->cryptlen <= AES_BLOCK_SIZE) { + if (req->cryptlen < AES_BLOCK_SIZE) + return -EINVAL; + cbc_blocks = 1; + } + + if (cbc_blocks > 0) { + skcipher_request_set_crypt(&subreq, req->src, req->dst, + cbc_blocks * AES_BLOCK_SIZE, + req->iv); + + err = skcipher_walk_virt(&walk, &subreq, false) ?: + cbc_decrypt_walk(&subreq, &walk); + if (err) + return err; + + if (req->cryptlen == AES_BLOCK_SIZE) + return 0; + + dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen); + if (req->dst != req->src) + dst = scatterwalk_ffwd(sg_dst, req->dst, + subreq.cryptlen); + } + + /* handle ciphertext stealing */ + skcipher_request_set_crypt(&subreq, src, dst, + req->cryptlen - cbc_blocks * AES_BLOCK_SIZE, + req->iv); + + err = skcipher_walk_virt(&walk, &subreq, false); + if (err) + return err; + + scoped_ksimd() + aes_cbc_cts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key_dec, rounds, walk.nbytes, walk.iv); + + return skcipher_walk_done(&walk, 0); +} + +static int __maybe_unused essiv_cbc_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_essiv_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key1.key_length / 4; + struct skcipher_walk walk; + unsigned int blocks; + + err = skcipher_walk_virt(&walk, req, false); + + blocks = walk.nbytes / AES_BLOCK_SIZE; + if (blocks) { + scoped_ksimd() + aes_essiv_cbc_encrypt(walk.dst.virt.addr, + walk.src.virt.addr, + ctx->key1.key_enc, rounds, blocks, + req->iv, ctx->key2.key_enc); + err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); + } + return err ?: cbc_encrypt_walk(req, &walk); +} + +static int __maybe_unused essiv_cbc_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_essiv_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key1.key_length / 4; + struct skcipher_walk walk; + unsigned int blocks; + + err = skcipher_walk_virt(&walk, req, false); + + blocks = walk.nbytes / AES_BLOCK_SIZE; + if (blocks) { + scoped_ksimd() + aes_essiv_cbc_decrypt(walk.dst.virt.addr, + walk.src.virt.addr, + ctx->key1.key_dec, rounds, blocks, + req->iv, ctx->key2.key_enc); + err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); + } + return err ?: cbc_decrypt_walk(req, &walk); +} + +static int __maybe_unused xctr_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key_length / 4; + struct skcipher_walk walk; + unsigned int byte_ctr = 0; + + err = skcipher_walk_virt(&walk, req, false); + + while (walk.nbytes > 0) { + const u8 *src = walk.src.virt.addr; + unsigned int nbytes = walk.nbytes; + u8 *dst = walk.dst.virt.addr; + u8 buf[AES_BLOCK_SIZE]; + + /* + * If given less than 16 bytes, we must copy the partial block + * into a temporary buffer of 16 bytes to avoid out of bounds + * reads and writes. Furthermore, this code is somewhat unusual + * in that it expects the end of the data to be at the end of + * the temporary buffer, rather than the start of the data at + * the start of the temporary buffer. + */ + if (unlikely(nbytes < AES_BLOCK_SIZE)) + src = dst = memcpy(buf + sizeof(buf) - nbytes, + src, nbytes); + else if (nbytes < walk.total) + nbytes &= ~(AES_BLOCK_SIZE - 1); + + scoped_ksimd() + aes_xctr_encrypt(dst, src, ctx->key_enc, rounds, nbytes, + walk.iv, byte_ctr); + + if (unlikely(nbytes < AES_BLOCK_SIZE)) + memcpy(walk.dst.virt.addr, + buf + sizeof(buf) - nbytes, nbytes); + byte_ctr += nbytes; + + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + } + + return err; +} + +static int __maybe_unused ctr_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, rounds = 6 + ctx->key_length / 4; + struct skcipher_walk walk; + + err = skcipher_walk_virt(&walk, req, false); + + while (walk.nbytes > 0) { + const u8 *src = walk.src.virt.addr; + unsigned int nbytes = walk.nbytes; + u8 *dst = walk.dst.virt.addr; + u8 buf[AES_BLOCK_SIZE]; + + /* + * If given less than 16 bytes, we must copy the partial block + * into a temporary buffer of 16 bytes to avoid out of bounds + * reads and writes. Furthermore, this code is somewhat unusual + * in that it expects the end of the data to be at the end of + * the temporary buffer, rather than the start of the data at + * the start of the temporary buffer. + */ + if (unlikely(nbytes < AES_BLOCK_SIZE)) + src = dst = memcpy(buf + sizeof(buf) - nbytes, + src, nbytes); + else if (nbytes < walk.total) + nbytes &= ~(AES_BLOCK_SIZE - 1); + + scoped_ksimd() + aes_ctr_encrypt(dst, src, ctx->key_enc, rounds, nbytes, + walk.iv); + + if (unlikely(nbytes < AES_BLOCK_SIZE)) + memcpy(walk.dst.virt.addr, + buf + sizeof(buf) - nbytes, nbytes); + + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + } + + return err; +} + +static int __maybe_unused xts_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, first, rounds = 6 + ctx->key1.key_length / 4; + int tail = req->cryptlen % AES_BLOCK_SIZE; + struct scatterlist sg_src[2], sg_dst[2]; + struct skcipher_request subreq; + struct scatterlist *src, *dst; + struct skcipher_walk walk; + + if (req->cryptlen < AES_BLOCK_SIZE) + return -EINVAL; + + err = skcipher_walk_virt(&walk, req, false); + + if (unlikely(tail > 0 && walk.nbytes < walk.total)) { + int xts_blocks = DIV_ROUND_UP(req->cryptlen, + AES_BLOCK_SIZE) - 2; + + skcipher_walk_abort(&walk); + + skcipher_request_set_tfm(&subreq, tfm); + skcipher_request_set_callback(&subreq, + skcipher_request_flags(req), + NULL, NULL); + skcipher_request_set_crypt(&subreq, req->src, req->dst, + xts_blocks * AES_BLOCK_SIZE, + req->iv); + req = &subreq; + err = skcipher_walk_virt(&walk, req, false); + } else { + tail = 0; + } + + scoped_ksimd() { + for (first = 1; walk.nbytes >= AES_BLOCK_SIZE; first = 0) { + int nbytes = walk.nbytes; + + if (walk.nbytes < walk.total) + nbytes &= ~(AES_BLOCK_SIZE - 1); + + aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key1.key_enc, rounds, nbytes, + ctx->key2.key_enc, walk.iv, first); + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + } + + if (err || likely(!tail)) + return err; + + dst = src = scatterwalk_ffwd(sg_src, req->src, req->cryptlen); + if (req->dst != req->src) + dst = scatterwalk_ffwd(sg_dst, req->dst, req->cryptlen); + + skcipher_request_set_crypt(req, src, dst, AES_BLOCK_SIZE + tail, + req->iv); + + err = skcipher_walk_virt(&walk, &subreq, false); + if (err) + return err; + + aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key1.key_enc, rounds, walk.nbytes, + ctx->key2.key_enc, walk.iv, first); + } + return skcipher_walk_done(&walk, 0); +} + +static int __maybe_unused xts_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm); + int err, first, rounds = 6 + ctx->key1.key_length / 4; + int tail = req->cryptlen % AES_BLOCK_SIZE; + struct scatterlist sg_src[2], sg_dst[2]; + struct skcipher_request subreq; + struct scatterlist *src, *dst; + struct skcipher_walk walk; + + if (req->cryptlen < AES_BLOCK_SIZE) + return -EINVAL; + + err = skcipher_walk_virt(&walk, req, false); + + if (unlikely(tail > 0 && walk.nbytes < walk.total)) { + int xts_blocks = DIV_ROUND_UP(req->cryptlen, + AES_BLOCK_SIZE) - 2; + + skcipher_walk_abort(&walk); + + skcipher_request_set_tfm(&subreq, tfm); + skcipher_request_set_callback(&subreq, + skcipher_request_flags(req), + NULL, NULL); + skcipher_request_set_crypt(&subreq, req->src, req->dst, + xts_blocks * AES_BLOCK_SIZE, + req->iv); + req = &subreq; + err = skcipher_walk_virt(&walk, req, false); + } else { + tail = 0; + } + + scoped_ksimd() { + for (first = 1; walk.nbytes >= AES_BLOCK_SIZE; first = 0) { + int nbytes = walk.nbytes; + + if (walk.nbytes < walk.total) + nbytes &= ~(AES_BLOCK_SIZE - 1); + + aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key1.key_dec, rounds, nbytes, + ctx->key2.key_enc, walk.iv, first); + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + } + + if (err || likely(!tail)) + return err; + + dst = src = scatterwalk_ffwd(sg_src, req->src, req->cryptlen); + if (req->dst != req->src) + dst = scatterwalk_ffwd(sg_dst, req->dst, req->cryptlen); + + skcipher_request_set_crypt(req, src, dst, AES_BLOCK_SIZE + tail, + req->iv); + + err = skcipher_walk_virt(&walk, &subreq, false); + if (err) + return err; + + aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, + ctx->key1.key_dec, rounds, walk.nbytes, + ctx->key2.key_enc, walk.iv, first); + } + return skcipher_walk_done(&walk, 0); +} + +static struct skcipher_alg aes_algs[] = { { +#if defined(USE_V8_CRYPTO_EXTENSIONS) || !IS_ENABLED(CONFIG_CRYPTO_AES_ARM64_BS) + .base = { + .cra_name = "ecb(aes)", + .cra_driver_name = "ecb-aes-" MODE, + .cra_priority = PRIO, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct crypto_aes_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .setkey = skcipher_aes_setkey, + .encrypt = ecb_encrypt, + .decrypt = ecb_decrypt, +}, { + .base = { + .cra_name = "cbc(aes)", + .cra_driver_name = "cbc-aes-" MODE, + .cra_priority = PRIO, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct crypto_aes_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .setkey = skcipher_aes_setkey, + .encrypt = cbc_encrypt, + .decrypt = cbc_decrypt, +}, { + .base = { + .cra_name = "ctr(aes)", + .cra_driver_name = "ctr-aes-" MODE, + .cra_priority = PRIO, + .cra_blocksize = 1, + .cra_ctxsize = sizeof(struct crypto_aes_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .chunksize = AES_BLOCK_SIZE, + .setkey = skcipher_aes_setkey, + .encrypt = ctr_encrypt, + .decrypt = ctr_encrypt, +}, { + .base = { + .cra_name = "xctr(aes)", + .cra_driver_name = "xctr-aes-" MODE, + .cra_priority = PRIO, + .cra_blocksize = 1, + .cra_ctxsize = sizeof(struct crypto_aes_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .chunksize = AES_BLOCK_SIZE, + .setkey = skcipher_aes_setkey, + .encrypt = xctr_encrypt, + .decrypt = xctr_encrypt, +}, { + .base = { + .cra_name = "xts(aes)", + .cra_driver_name = "xts-aes-" MODE, + .cra_priority = PRIO, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct crypto_aes_xts_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = 2 * AES_MIN_KEY_SIZE, + .max_keysize = 2 * AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .walksize = 2 * AES_BLOCK_SIZE, + .setkey = xts_set_key, + .encrypt = xts_encrypt, + .decrypt = xts_decrypt, +}, { +#endif + .base = { + .cra_name = "cts(cbc(aes))", + .cra_driver_name = "cts-cbc-aes-" MODE, + .cra_priority = PRIO, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct crypto_aes_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .walksize = 2 * AES_BLOCK_SIZE, + .setkey = skcipher_aes_setkey, + .encrypt = cts_cbc_encrypt, + .decrypt = cts_cbc_decrypt, +}, { + .base = { + .cra_name = "essiv(cbc(aes),sha256)", + .cra_driver_name = "essiv-cbc-aes-sha256-" MODE, + .cra_priority = PRIO + 1, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct crypto_aes_essiv_cbc_ctx), + .cra_module = THIS_MODULE, + }, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .setkey = essiv_cbc_set_key, + .encrypt = essiv_cbc_encrypt, + .decrypt = essiv_cbc_decrypt, +} }; + +static void aes_exit(void) +{ + crypto_unregister_skciphers(aes_algs, ARRAY_SIZE(aes_algs)); +} + +static int __init aes_init(void) +{ + return crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs)); +} + +#ifdef USE_V8_CRYPTO_EXTENSIONS +module_cpu_feature_match(AES, aes_init); +#else +module_init(aes_init); +#endif +module_exit(aes_exit); |