mirror of https://github.com/OpenIPC/firmware.git
275 lines
6.9 KiB
Diff
275 lines
6.9 KiB
Diff
diff -drupN a/arch/arm64/crypto/aes-ce-cipher.c b/arch/arm64/crypto/aes-ce-cipher.c
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--- a/arch/arm64/crypto/aes-ce-cipher.c 2018-08-06 17:23:04.000000000 +0300
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+++ b/arch/arm64/crypto/aes-ce-cipher.c 1970-01-01 03:00:00.000000000 +0300
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@@ -1,270 +0,0 @@
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-/*
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- * aes-ce-cipher.c - core AES cipher using ARMv8 Crypto Extensions
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- *
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- * Copyright (C) 2013 - 2014 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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-
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-#include <asm/neon.h>
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-#include <crypto/aes.h>
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-#include <linux/cpufeature.h>
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-#include <linux/crypto.h>
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-#include <linux/module.h>
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-
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-#include "aes-ce-setkey.h"
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-
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-MODULE_DESCRIPTION("Synchronous AES cipher using ARMv8 Crypto Extensions");
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-MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
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-MODULE_LICENSE("GPL v2");
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-
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-struct aes_block {
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- u8 b[AES_BLOCK_SIZE];
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-};
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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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-
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-static void aes_cipher_encrypt(struct crypto_tfm *tfm, u8 dst[], u8 const src[])
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-{
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- struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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- struct aes_block *out = (struct aes_block *)dst;
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- struct aes_block const *in = (struct aes_block *)src;
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- void *dummy0;
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- int dummy1;
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-
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- kernel_neon_begin_partial(4);
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-
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- __asm__(" ld1 {v0.16b}, %[in] ;"
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- " ld1 {v1.16b}, [%[key]], #16 ;"
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- " cmp %w[rounds], #10 ;"
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- " bmi 0f ;"
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- " bne 3f ;"
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- " mov v3.16b, v1.16b ;"
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- " b 2f ;"
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- "0: mov v2.16b, v1.16b ;"
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- " ld1 {v3.16b}, [%[key]], #16 ;"
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- "1: aese v0.16b, v2.16b ;"
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- " aesmc v0.16b, v0.16b ;"
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- "2: ld1 {v1.16b}, [%[key]], #16 ;"
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- " aese v0.16b, v3.16b ;"
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- " aesmc v0.16b, v0.16b ;"
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- "3: ld1 {v2.16b}, [%[key]], #16 ;"
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- " subs %w[rounds], %w[rounds], #3 ;"
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- " aese v0.16b, v1.16b ;"
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- " aesmc v0.16b, v0.16b ;"
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- " ld1 {v3.16b}, [%[key]], #16 ;"
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- " bpl 1b ;"
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- " aese v0.16b, v2.16b ;"
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- " eor v0.16b, v0.16b, v3.16b ;"
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- " st1 {v0.16b}, %[out] ;"
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-
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- : [out] "=Q"(*out),
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- [key] "=r"(dummy0),
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- [rounds] "=r"(dummy1)
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- : [in] "Q"(*in),
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- "1"(ctx->key_enc),
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- "2"(num_rounds(ctx) - 2)
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- : "cc");
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-
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- kernel_neon_end();
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-}
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-
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-static void aes_cipher_decrypt(struct crypto_tfm *tfm, u8 dst[], u8 const src[])
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-{
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- struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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- struct aes_block *out = (struct aes_block *)dst;
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- struct aes_block const *in = (struct aes_block *)src;
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- void *dummy0;
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- int dummy1;
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-
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- kernel_neon_begin_partial(4);
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-
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- __asm__(" ld1 {v0.16b}, %[in] ;"
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- " ld1 {v1.16b}, [%[key]], #16 ;"
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- " cmp %w[rounds], #10 ;"
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- " bmi 0f ;"
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- " bne 3f ;"
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- " mov v3.16b, v1.16b ;"
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- " b 2f ;"
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- "0: mov v2.16b, v1.16b ;"
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- " ld1 {v3.16b}, [%[key]], #16 ;"
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- "1: aesd v0.16b, v2.16b ;"
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- " aesimc v0.16b, v0.16b ;"
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- "2: ld1 {v1.16b}, [%[key]], #16 ;"
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- " aesd v0.16b, v3.16b ;"
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- " aesimc v0.16b, v0.16b ;"
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- "3: ld1 {v2.16b}, [%[key]], #16 ;"
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- " subs %w[rounds], %w[rounds], #3 ;"
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- " aesd v0.16b, v1.16b ;"
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- " aesimc v0.16b, v0.16b ;"
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- " ld1 {v3.16b}, [%[key]], #16 ;"
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- " bpl 1b ;"
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- " aesd v0.16b, v2.16b ;"
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- " eor v0.16b, v0.16b, v3.16b ;"
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- " st1 {v0.16b}, %[out] ;"
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-
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- : [out] "=Q"(*out),
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- [key] "=r"(dummy0),
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- [rounds] "=r"(dummy1)
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- : [in] "Q"(*in),
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- "1"(ctx->key_dec),
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- "2"(num_rounds(ctx) - 2)
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- : "cc");
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-
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- kernel_neon_end();
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-}
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-
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-/*
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- * aes_sub() - use the aese instruction to perform the AES sbox substitution
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- * on each byte in 'input'
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- */
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-static u32 aes_sub(u32 input)
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-{
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- u32 ret;
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-
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- __asm__("dup v1.4s, %w[in] ;"
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- "movi v0.16b, #0 ;"
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- "aese v0.16b, v1.16b ;"
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- "umov %w[out], v0.4s[0] ;"
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-
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- : [out] "=r"(ret)
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- : [in] "r"(input)
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- : "v0","v1");
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-
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- return ret;
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-}
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-
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-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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-
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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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-
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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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-
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- memcpy(ctx->key_enc, in_key, key_len);
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- ctx->key_length = key_len;
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-
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- kernel_neon_begin_partial(2);
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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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-
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-#ifndef CONFIG_CPU_BIG_ENDIAN
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- rko[0] = ror32(aes_sub(rki[kwords - 1]), 8) ^ rcon[i] ^ rki[0];
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-#else
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- rko[0] = rol32(aes_sub(rki[kwords - 1]), 8) ^ (rcon[i] << 24) ^
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- rki[0];
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-#endif
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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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-
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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] = 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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- /*
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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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-
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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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- __asm__("ld1 {v0.16b}, %[in] ;"
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- "aesimc v1.16b, v0.16b ;"
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- "st1 {v1.16b}, %[out] ;"
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-
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- : [out] "=Q"(key_dec[i])
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- : [in] "Q"(key_enc[j])
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- : "v0","v1");
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- key_dec[i] = key_enc[0];
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-
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- kernel_neon_end();
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- return 0;
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-}
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-EXPORT_SYMBOL(ce_aes_expandkey);
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-
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-int ce_aes_setkey(struct crypto_tfm *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_tfm_ctx(tfm);
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- int ret;
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-
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- ret = ce_aes_expandkey(ctx, in_key, key_len);
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- if (!ret)
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- return 0;
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-
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- tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
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- return -EINVAL;
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-}
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-EXPORT_SYMBOL(ce_aes_setkey);
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-
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-static struct crypto_alg aes_alg = {
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- .cra_name = "aes",
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- .cra_driver_name = "aes-ce",
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- .cra_priority = 250,
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- .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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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_module = THIS_MODULE,
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- .cra_cipher = {
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- .cia_min_keysize = AES_MIN_KEY_SIZE,
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- .cia_max_keysize = AES_MAX_KEY_SIZE,
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- .cia_setkey = ce_aes_setkey,
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- .cia_encrypt = aes_cipher_encrypt,
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- .cia_decrypt = aes_cipher_decrypt
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- }
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-};
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-
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-static int __init aes_mod_init(void)
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-{
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- return crypto_register_alg(&aes_alg);
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-}
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-
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-static void __exit aes_mod_exit(void)
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-{
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- crypto_unregister_alg(&aes_alg);
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-}
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-
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-module_cpu_feature_match(AES, aes_mod_init);
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-module_exit(aes_mod_exit);
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