Stricted
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* linux/arch/arm64/crypto/aes-glue.c - wrapper code for ARMv8 AES
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*
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* Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <crypto/aes.h>
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#include <crypto/ablk_helper.h>
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#include <crypto/algapi.h>
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#include <linux/module.h>
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#include <linux/cpufeature.h>
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asmlinkage void aes_v8_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[],
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int rounds, int blocks, u8 iv[], int first);
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asmlinkage void aes_v8_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[],
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int rounds, int blocks, u8 iv[], int first);
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static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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int err, first, rounds = 6 + ctx->key_length / 4;
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struct blkcipher_walk walk;
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unsigned int blocks;
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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//kernel_neon_begin();
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for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
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aes_v8_cbc_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key_enc, rounds, blocks, walk.iv,
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first);
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err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE);
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}
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//kernel_neon_end();
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return err;
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}
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static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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int err, first, rounds = 6 + ctx->key_length / 4;
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struct blkcipher_walk walk;
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unsigned int blocks;
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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//kernel_neon_begin();
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for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) {
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aes_v8_cbc_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key_dec, rounds, blocks, walk.iv,
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first);
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err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE);
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}
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//kernel_neon_end();
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return err;
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}
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static struct crypto_alg aes_algs[] = { {
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.cra_name = "__cbc-aes-armv8" ,
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.cra_driver_name = "__driver-cbc-aes-armv8" ,
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct crypto_aes_ctx),
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.cra_alignmask = 7,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_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 = crypto_aes_set_key,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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},
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}, {
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.cra_name = "cbc(aes)",
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.cra_driver_name = "cbc-aes-armv8",
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.cra_priority = 300,
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct async_helper_ctx),
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.cra_alignmask = 7,
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.cra_type = &crypto_ablkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_init = ablk_init,
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.cra_exit = ablk_exit,
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.cra_ablkcipher = {
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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 = ablk_set_key,
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.encrypt = ablk_encrypt,
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.decrypt = ablk_decrypt,
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}
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} };
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static int __init aes_init(void)
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{
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return crypto_register_algs(aes_algs, ARRAY_SIZE(aes_algs));
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}
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static void __exit aes_exit(void)
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{
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crypto_unregister_algs(aes_algs, ARRAY_SIZE(aes_algs));
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}
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module_init(aes_init);
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module_exit(aes_exit);
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