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730 lines
20 KiB
730 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* aes-ce-glue.c - wrapper code for ARMv8 AES |
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* |
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* Copyright (C) 2015 Linaro Ltd <[email protected]> |
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*/ |
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|
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#include <asm/hwcap.h> |
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#include <asm/neon.h> |
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#include <asm/simd.h> |
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#include <asm/unaligned.h> |
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#include <crypto/aes.h> |
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#include <crypto/ctr.h> |
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#include <crypto/internal/simd.h> |
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#include <crypto/internal/skcipher.h> |
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#include <crypto/scatterwalk.h> |
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#include <linux/cpufeature.h> |
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#include <linux/module.h> |
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#include <crypto/xts.h> |
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MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS using ARMv8 Crypto Extensions"); |
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MODULE_AUTHOR("Ard Biesheuvel <[email protected]>"); |
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MODULE_LICENSE("GPL v2"); |
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|
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/* defined in aes-ce-core.S */ |
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asmlinkage u32 ce_aes_sub(u32 input); |
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asmlinkage void ce_aes_invert(void *dst, void *src); |
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asmlinkage void ce_aes_ecb_encrypt(u8 out[], u8 const in[], u32 const rk[], |
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int rounds, int blocks); |
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asmlinkage void ce_aes_ecb_decrypt(u8 out[], u8 const in[], u32 const rk[], |
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int rounds, int blocks); |
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asmlinkage void ce_aes_cbc_encrypt(u8 out[], u8 const in[], u32 const rk[], |
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int rounds, int blocks, u8 iv[]); |
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asmlinkage void ce_aes_cbc_decrypt(u8 out[], u8 const in[], u32 const rk[], |
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int rounds, int blocks, u8 iv[]); |
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asmlinkage void ce_aes_cbc_cts_encrypt(u8 out[], u8 const in[], u32 const rk[], |
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int rounds, int bytes, u8 const iv[]); |
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asmlinkage void ce_aes_cbc_cts_decrypt(u8 out[], u8 const in[], u32 const rk[], |
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int rounds, int bytes, u8 const iv[]); |
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asmlinkage void ce_aes_ctr_encrypt(u8 out[], u8 const in[], u32 const rk[], |
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int rounds, int blocks, u8 ctr[]); |
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asmlinkage void ce_aes_xts_encrypt(u8 out[], u8 const in[], u32 const rk1[], |
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int rounds, int bytes, u8 iv[], |
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u32 const rk2[], int first); |
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asmlinkage void ce_aes_xts_decrypt(u8 out[], u8 const in[], u32 const rk1[], |
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int rounds, int bytes, u8 iv[], |
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u32 const rk2[], int first); |
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struct aes_block { |
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u8 b[AES_BLOCK_SIZE]; |
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}; |
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static int num_rounds(struct crypto_aes_ctx *ctx) |
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{ |
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/* |
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* # of rounds specified by AES: |
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* 128 bit key 10 rounds |
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* 192 bit key 12 rounds |
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* 256 bit key 14 rounds |
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* => n byte key => 6 + (n/4) rounds |
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*/ |
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return 6 + ctx->key_length / 4; |
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} |
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static int ce_aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key, |
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unsigned int key_len) |
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{ |
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/* |
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* The AES key schedule round constants |
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*/ |
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static u8 const rcon[] = { |
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0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, |
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}; |
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u32 kwords = key_len / sizeof(u32); |
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struct aes_block *key_enc, *key_dec; |
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int i, j; |
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if (key_len != AES_KEYSIZE_128 && |
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key_len != AES_KEYSIZE_192 && |
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key_len != AES_KEYSIZE_256) |
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return -EINVAL; |
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ctx->key_length = key_len; |
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for (i = 0; i < kwords; i++) |
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ctx->key_enc[i] = get_unaligned_le32(in_key + i * sizeof(u32)); |
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kernel_neon_begin(); |
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for (i = 0; i < sizeof(rcon); i++) { |
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u32 *rki = ctx->key_enc + (i * kwords); |
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u32 *rko = rki + kwords; |
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rko[0] = ror32(ce_aes_sub(rki[kwords - 1]), 8); |
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rko[0] = rko[0] ^ rki[0] ^ rcon[i]; |
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rko[1] = rko[0] ^ rki[1]; |
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rko[2] = rko[1] ^ rki[2]; |
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rko[3] = rko[2] ^ rki[3]; |
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if (key_len == AES_KEYSIZE_192) { |
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if (i >= 7) |
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break; |
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rko[4] = rko[3] ^ rki[4]; |
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rko[5] = rko[4] ^ rki[5]; |
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} else if (key_len == AES_KEYSIZE_256) { |
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if (i >= 6) |
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break; |
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rko[4] = ce_aes_sub(rko[3]) ^ rki[4]; |
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rko[5] = rko[4] ^ rki[5]; |
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rko[6] = rko[5] ^ rki[6]; |
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rko[7] = rko[6] ^ rki[7]; |
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} |
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} |
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/* |
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* Generate the decryption keys for the Equivalent Inverse Cipher. |
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* This involves reversing the order of the round keys, and applying |
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* the Inverse Mix Columns transformation on all but the first and |
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* the last one. |
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*/ |
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key_enc = (struct aes_block *)ctx->key_enc; |
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key_dec = (struct aes_block *)ctx->key_dec; |
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j = num_rounds(ctx); |
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key_dec[0] = key_enc[j]; |
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for (i = 1, j--; j > 0; i++, j--) |
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ce_aes_invert(key_dec + i, key_enc + j); |
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key_dec[i] = key_enc[0]; |
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kernel_neon_end(); |
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return 0; |
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} |
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static int ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *in_key, |
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unsigned int key_len) |
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{ |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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return ce_aes_expandkey(ctx, in_key, key_len); |
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} |
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struct crypto_aes_xts_ctx { |
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struct crypto_aes_ctx key1; |
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struct crypto_aes_ctx __aligned(8) key2; |
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}; |
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static int xts_set_key(struct crypto_skcipher *tfm, const u8 *in_key, |
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unsigned int key_len) |
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{ |
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struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm); |
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int ret; |
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ret = xts_verify_key(tfm, in_key, key_len); |
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if (ret) |
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return ret; |
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ret = ce_aes_expandkey(&ctx->key1, in_key, key_len / 2); |
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if (!ret) |
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ret = ce_aes_expandkey(&ctx->key2, &in_key[key_len / 2], |
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key_len / 2); |
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return ret; |
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} |
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static int ecb_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct skcipher_walk walk; |
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unsigned int blocks; |
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int err; |
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err = skcipher_walk_virt(&walk, req, false); |
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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { |
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kernel_neon_begin(); |
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ce_aes_ecb_encrypt(walk.dst.virt.addr, walk.src.virt.addr, |
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ctx->key_enc, num_rounds(ctx), blocks); |
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kernel_neon_end(); |
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err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); |
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} |
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return err; |
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} |
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static int ecb_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct skcipher_walk walk; |
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unsigned int blocks; |
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int err; |
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err = skcipher_walk_virt(&walk, req, false); |
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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { |
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kernel_neon_begin(); |
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ce_aes_ecb_decrypt(walk.dst.virt.addr, walk.src.virt.addr, |
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ctx->key_dec, num_rounds(ctx), blocks); |
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kernel_neon_end(); |
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err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); |
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} |
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return err; |
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} |
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static int cbc_encrypt_walk(struct skcipher_request *req, |
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struct skcipher_walk *walk) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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unsigned int blocks; |
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int err = 0; |
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while ((blocks = (walk->nbytes / AES_BLOCK_SIZE))) { |
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kernel_neon_begin(); |
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ce_aes_cbc_encrypt(walk->dst.virt.addr, walk->src.virt.addr, |
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ctx->key_enc, num_rounds(ctx), blocks, |
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walk->iv); |
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kernel_neon_end(); |
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err = skcipher_walk_done(walk, walk->nbytes % AES_BLOCK_SIZE); |
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} |
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return err; |
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} |
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static int cbc_encrypt(struct skcipher_request *req) |
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{ |
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struct skcipher_walk walk; |
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int err; |
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err = skcipher_walk_virt(&walk, req, false); |
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if (err) |
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return err; |
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return cbc_encrypt_walk(req, &walk); |
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} |
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static int cbc_decrypt_walk(struct skcipher_request *req, |
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struct skcipher_walk *walk) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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unsigned int blocks; |
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int err = 0; |
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while ((blocks = (walk->nbytes / AES_BLOCK_SIZE))) { |
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kernel_neon_begin(); |
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ce_aes_cbc_decrypt(walk->dst.virt.addr, walk->src.virt.addr, |
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ctx->key_dec, num_rounds(ctx), blocks, |
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walk->iv); |
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kernel_neon_end(); |
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err = skcipher_walk_done(walk, walk->nbytes % AES_BLOCK_SIZE); |
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} |
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return err; |
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} |
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static int cbc_decrypt(struct skcipher_request *req) |
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{ |
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struct skcipher_walk walk; |
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int err; |
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err = skcipher_walk_virt(&walk, req, false); |
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if (err) |
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return err; |
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return cbc_decrypt_walk(req, &walk); |
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} |
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static int cts_cbc_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; |
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struct scatterlist *src = req->src, *dst = req->dst; |
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struct scatterlist sg_src[2], sg_dst[2]; |
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struct skcipher_request subreq; |
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struct skcipher_walk walk; |
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int err; |
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skcipher_request_set_tfm(&subreq, tfm); |
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skcipher_request_set_callback(&subreq, skcipher_request_flags(req), |
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NULL, NULL); |
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if (req->cryptlen <= AES_BLOCK_SIZE) { |
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if (req->cryptlen < AES_BLOCK_SIZE) |
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return -EINVAL; |
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cbc_blocks = 1; |
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} |
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if (cbc_blocks > 0) { |
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skcipher_request_set_crypt(&subreq, req->src, req->dst, |
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cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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err = skcipher_walk_virt(&walk, &subreq, false) ?: |
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cbc_encrypt_walk(&subreq, &walk); |
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if (err) |
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return err; |
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if (req->cryptlen == AES_BLOCK_SIZE) |
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return 0; |
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dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen); |
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if (req->dst != req->src) |
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dst = scatterwalk_ffwd(sg_dst, req->dst, |
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subreq.cryptlen); |
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} |
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/* handle ciphertext stealing */ |
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skcipher_request_set_crypt(&subreq, src, dst, |
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req->cryptlen - cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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err = skcipher_walk_virt(&walk, &subreq, false); |
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if (err) |
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return err; |
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kernel_neon_begin(); |
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ce_aes_cbc_cts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, |
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ctx->key_enc, num_rounds(ctx), walk.nbytes, |
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walk.iv); |
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kernel_neon_end(); |
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return skcipher_walk_done(&walk, 0); |
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} |
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static int cts_cbc_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2; |
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struct scatterlist *src = req->src, *dst = req->dst; |
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struct scatterlist sg_src[2], sg_dst[2]; |
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struct skcipher_request subreq; |
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struct skcipher_walk walk; |
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int err; |
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skcipher_request_set_tfm(&subreq, tfm); |
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skcipher_request_set_callback(&subreq, skcipher_request_flags(req), |
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NULL, NULL); |
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if (req->cryptlen <= AES_BLOCK_SIZE) { |
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if (req->cryptlen < AES_BLOCK_SIZE) |
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return -EINVAL; |
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cbc_blocks = 1; |
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} |
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if (cbc_blocks > 0) { |
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skcipher_request_set_crypt(&subreq, req->src, req->dst, |
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cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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err = skcipher_walk_virt(&walk, &subreq, false) ?: |
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cbc_decrypt_walk(&subreq, &walk); |
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if (err) |
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return err; |
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if (req->cryptlen == AES_BLOCK_SIZE) |
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return 0; |
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dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen); |
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if (req->dst != req->src) |
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dst = scatterwalk_ffwd(sg_dst, req->dst, |
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subreq.cryptlen); |
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} |
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/* handle ciphertext stealing */ |
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skcipher_request_set_crypt(&subreq, src, dst, |
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req->cryptlen - cbc_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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err = skcipher_walk_virt(&walk, &subreq, false); |
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if (err) |
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return err; |
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kernel_neon_begin(); |
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ce_aes_cbc_cts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, |
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ctx->key_dec, num_rounds(ctx), walk.nbytes, |
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walk.iv); |
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kernel_neon_end(); |
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return skcipher_walk_done(&walk, 0); |
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} |
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static int ctr_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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struct skcipher_walk walk; |
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int err, blocks; |
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err = skcipher_walk_virt(&walk, req, false); |
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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { |
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kernel_neon_begin(); |
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ce_aes_ctr_encrypt(walk.dst.virt.addr, walk.src.virt.addr, |
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ctx->key_enc, num_rounds(ctx), blocks, |
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walk.iv); |
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kernel_neon_end(); |
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err = skcipher_walk_done(&walk, walk.nbytes % AES_BLOCK_SIZE); |
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} |
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if (walk.nbytes) { |
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u8 __aligned(8) tail[AES_BLOCK_SIZE]; |
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unsigned int nbytes = walk.nbytes; |
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u8 *tdst = walk.dst.virt.addr; |
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u8 *tsrc = walk.src.virt.addr; |
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/* |
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* Tell aes_ctr_encrypt() to process a tail block. |
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*/ |
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blocks = -1; |
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kernel_neon_begin(); |
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ce_aes_ctr_encrypt(tail, NULL, ctx->key_enc, num_rounds(ctx), |
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blocks, walk.iv); |
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kernel_neon_end(); |
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crypto_xor_cpy(tdst, tsrc, tail, nbytes); |
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err = skcipher_walk_done(&walk, 0); |
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} |
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return err; |
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} |
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static void ctr_encrypt_one(struct crypto_skcipher *tfm, const u8 *src, u8 *dst) |
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{ |
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struct crypto_aes_ctx *ctx = crypto_skcipher_ctx(tfm); |
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unsigned long flags; |
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/* |
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* Temporarily disable interrupts to avoid races where |
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* cachelines are evicted when the CPU is interrupted |
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* to do something else. |
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*/ |
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local_irq_save(flags); |
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aes_encrypt(ctx, dst, src); |
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local_irq_restore(flags); |
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} |
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static int ctr_encrypt_sync(struct skcipher_request *req) |
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{ |
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if (!crypto_simd_usable()) |
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return crypto_ctr_encrypt_walk(req, ctr_encrypt_one); |
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return ctr_encrypt(req); |
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} |
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static int xts_encrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm); |
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int err, first, rounds = num_rounds(&ctx->key1); |
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int tail = req->cryptlen % AES_BLOCK_SIZE; |
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struct scatterlist sg_src[2], sg_dst[2]; |
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struct skcipher_request subreq; |
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struct scatterlist *src, *dst; |
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struct skcipher_walk walk; |
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if (req->cryptlen < AES_BLOCK_SIZE) |
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return -EINVAL; |
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err = skcipher_walk_virt(&walk, req, false); |
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if (unlikely(tail > 0 && walk.nbytes < walk.total)) { |
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int xts_blocks = DIV_ROUND_UP(req->cryptlen, |
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AES_BLOCK_SIZE) - 2; |
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skcipher_walk_abort(&walk); |
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|
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skcipher_request_set_tfm(&subreq, tfm); |
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skcipher_request_set_callback(&subreq, |
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skcipher_request_flags(req), |
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NULL, NULL); |
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skcipher_request_set_crypt(&subreq, req->src, req->dst, |
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xts_blocks * AES_BLOCK_SIZE, |
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req->iv); |
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req = &subreq; |
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err = skcipher_walk_virt(&walk, req, false); |
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} else { |
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tail = 0; |
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} |
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for (first = 1; walk.nbytes >= AES_BLOCK_SIZE; first = 0) { |
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int nbytes = walk.nbytes; |
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|
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if (walk.nbytes < walk.total) |
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nbytes &= ~(AES_BLOCK_SIZE - 1); |
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|
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kernel_neon_begin(); |
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ce_aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, |
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ctx->key1.key_enc, rounds, nbytes, walk.iv, |
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ctx->key2.key_enc, first); |
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kernel_neon_end(); |
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err = skcipher_walk_done(&walk, walk.nbytes - nbytes); |
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} |
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if (err || likely(!tail)) |
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return err; |
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dst = src = scatterwalk_ffwd(sg_src, req->src, req->cryptlen); |
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if (req->dst != req->src) |
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dst = scatterwalk_ffwd(sg_dst, req->dst, req->cryptlen); |
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skcipher_request_set_crypt(req, src, dst, AES_BLOCK_SIZE + tail, |
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req->iv); |
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err = skcipher_walk_virt(&walk, req, false); |
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if (err) |
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return err; |
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kernel_neon_begin(); |
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ce_aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, |
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ctx->key1.key_enc, rounds, walk.nbytes, walk.iv, |
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ctx->key2.key_enc, first); |
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kernel_neon_end(); |
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return skcipher_walk_done(&walk, 0); |
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} |
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|
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static int xts_decrypt(struct skcipher_request *req) |
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{ |
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
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struct crypto_aes_xts_ctx *ctx = crypto_skcipher_ctx(tfm); |
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int err, first, rounds = num_rounds(&ctx->key1); |
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int tail = req->cryptlen % AES_BLOCK_SIZE; |
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struct scatterlist sg_src[2], sg_dst[2]; |
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struct skcipher_request subreq; |
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struct scatterlist *src, *dst; |
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struct skcipher_walk walk; |
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|
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if (req->cryptlen < AES_BLOCK_SIZE) |
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return -EINVAL; |
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|
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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; |
|
} |
|
|
|
for (first = 1; walk.nbytes >= AES_BLOCK_SIZE; first = 0) { |
|
int nbytes = walk.nbytes; |
|
|
|
if (walk.nbytes < walk.total) |
|
nbytes &= ~(AES_BLOCK_SIZE - 1); |
|
|
|
kernel_neon_begin(); |
|
ce_aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, |
|
ctx->key1.key_dec, rounds, nbytes, walk.iv, |
|
ctx->key2.key_enc, first); |
|
kernel_neon_end(); |
|
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, req, false); |
|
if (err) |
|
return err; |
|
|
|
kernel_neon_begin(); |
|
ce_aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, |
|
ctx->key1.key_dec, rounds, walk.nbytes, walk.iv, |
|
ctx->key2.key_enc, first); |
|
kernel_neon_end(); |
|
|
|
return skcipher_walk_done(&walk, 0); |
|
} |
|
|
|
static struct skcipher_alg aes_algs[] = { { |
|
.base.cra_name = "__ecb(aes)", |
|
.base.cra_driver_name = "__ecb-aes-ce", |
|
.base.cra_priority = 300, |
|
.base.cra_flags = CRYPTO_ALG_INTERNAL, |
|
.base.cra_blocksize = AES_BLOCK_SIZE, |
|
.base.cra_ctxsize = sizeof(struct crypto_aes_ctx), |
|
.base.cra_module = THIS_MODULE, |
|
|
|
.min_keysize = AES_MIN_KEY_SIZE, |
|
.max_keysize = AES_MAX_KEY_SIZE, |
|
.setkey = ce_aes_setkey, |
|
.encrypt = ecb_encrypt, |
|
.decrypt = ecb_decrypt, |
|
}, { |
|
.base.cra_name = "__cbc(aes)", |
|
.base.cra_driver_name = "__cbc-aes-ce", |
|
.base.cra_priority = 300, |
|
.base.cra_flags = CRYPTO_ALG_INTERNAL, |
|
.base.cra_blocksize = AES_BLOCK_SIZE, |
|
.base.cra_ctxsize = sizeof(struct crypto_aes_ctx), |
|
.base.cra_module = THIS_MODULE, |
|
|
|
.min_keysize = AES_MIN_KEY_SIZE, |
|
.max_keysize = AES_MAX_KEY_SIZE, |
|
.ivsize = AES_BLOCK_SIZE, |
|
.setkey = ce_aes_setkey, |
|
.encrypt = cbc_encrypt, |
|
.decrypt = cbc_decrypt, |
|
}, { |
|
.base.cra_name = "__cts(cbc(aes))", |
|
.base.cra_driver_name = "__cts-cbc-aes-ce", |
|
.base.cra_priority = 300, |
|
.base.cra_flags = CRYPTO_ALG_INTERNAL, |
|
.base.cra_blocksize = AES_BLOCK_SIZE, |
|
.base.cra_ctxsize = sizeof(struct crypto_aes_ctx), |
|
.base.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 = ce_aes_setkey, |
|
.encrypt = cts_cbc_encrypt, |
|
.decrypt = cts_cbc_decrypt, |
|
}, { |
|
.base.cra_name = "__ctr(aes)", |
|
.base.cra_driver_name = "__ctr-aes-ce", |
|
.base.cra_priority = 300, |
|
.base.cra_flags = CRYPTO_ALG_INTERNAL, |
|
.base.cra_blocksize = 1, |
|
.base.cra_ctxsize = sizeof(struct crypto_aes_ctx), |
|
.base.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 = ce_aes_setkey, |
|
.encrypt = ctr_encrypt, |
|
.decrypt = ctr_encrypt, |
|
}, { |
|
.base.cra_name = "ctr(aes)", |
|
.base.cra_driver_name = "ctr-aes-ce-sync", |
|
.base.cra_priority = 300 - 1, |
|
.base.cra_blocksize = 1, |
|
.base.cra_ctxsize = sizeof(struct crypto_aes_ctx), |
|
.base.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 = ce_aes_setkey, |
|
.encrypt = ctr_encrypt_sync, |
|
.decrypt = ctr_encrypt_sync, |
|
}, { |
|
.base.cra_name = "__xts(aes)", |
|
.base.cra_driver_name = "__xts-aes-ce", |
|
.base.cra_priority = 300, |
|
.base.cra_flags = CRYPTO_ALG_INTERNAL, |
|
.base.cra_blocksize = AES_BLOCK_SIZE, |
|
.base.cra_ctxsize = sizeof(struct crypto_aes_xts_ctx), |
|
.base.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, |
|
} }; |
|
|
|
static struct simd_skcipher_alg *aes_simd_algs[ARRAY_SIZE(aes_algs)]; |
|
|
|
static void aes_exit(void) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(aes_simd_algs) && aes_simd_algs[i]; i++) |
|
simd_skcipher_free(aes_simd_algs[i]); |
|
|
|
crypto_unregister_skciphers(aes_algs, ARRAY_SIZE(aes_algs)); |
|
} |
|
|
|
static int __init aes_init(void) |
|
{ |
|
struct simd_skcipher_alg *simd; |
|
const char *basename; |
|
const char *algname; |
|
const char *drvname; |
|
int err; |
|
int i; |
|
|
|
err = crypto_register_skciphers(aes_algs, ARRAY_SIZE(aes_algs)); |
|
if (err) |
|
return err; |
|
|
|
for (i = 0; i < ARRAY_SIZE(aes_algs); i++) { |
|
if (!(aes_algs[i].base.cra_flags & CRYPTO_ALG_INTERNAL)) |
|
continue; |
|
|
|
algname = aes_algs[i].base.cra_name + 2; |
|
drvname = aes_algs[i].base.cra_driver_name + 2; |
|
basename = aes_algs[i].base.cra_driver_name; |
|
simd = simd_skcipher_create_compat(algname, drvname, basename); |
|
err = PTR_ERR(simd); |
|
if (IS_ERR(simd)) |
|
goto unregister_simds; |
|
|
|
aes_simd_algs[i] = simd; |
|
} |
|
|
|
return 0; |
|
|
|
unregister_simds: |
|
aes_exit(); |
|
return err; |
|
} |
|
|
|
module_cpu_feature_match(AES, aes_init); |
|
module_exit(aes_exit);
|
|
|