forked from Minki/linux
70477371dc
Pull crypto update from Herbert Xu:
"Here is the crypto update for 4.6:
API:
- Convert remaining crypto_hash users to shash or ahash, also convert
blkcipher/ablkcipher users to skcipher.
- Remove crypto_hash interface.
- Remove crypto_pcomp interface.
- Add crypto engine for async cipher drivers.
- Add akcipher documentation.
- Add skcipher documentation.
Algorithms:
- Rename crypto/crc32 to avoid name clash with lib/crc32.
- Fix bug in keywrap where we zero the wrong pointer.
Drivers:
- Support T5/M5, T7/M7 SPARC CPUs in n2 hwrng driver.
- Add PIC32 hwrng driver.
- Support BCM6368 in bcm63xx hwrng driver.
- Pack structs for 32-bit compat users in qat.
- Use crypto engine in omap-aes.
- Add support for sama5d2x SoCs in atmel-sha.
- Make atmel-sha available again.
- Make sahara hashing available again.
- Make ccp hashing available again.
- Make sha1-mb available again.
- Add support for multiple devices in ccp.
- Improve DMA performance in caam.
- Add hashing support to rockchip"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (116 commits)
crypto: qat - remove redundant arbiter configuration
crypto: ux500 - fix checks of error code returned by devm_ioremap_resource()
crypto: atmel - fix checks of error code returned by devm_ioremap_resource()
crypto: qat - Change the definition of icp_qat_uof_regtype
hwrng: exynos - use __maybe_unused to hide pm functions
crypto: ccp - Add abstraction for device-specific calls
crypto: ccp - CCP versioning support
crypto: ccp - Support for multiple CCPs
crypto: ccp - Remove check for x86 family and model
crypto: ccp - memset request context to zero during import
lib/mpi: use "static inline" instead of "extern inline"
lib/mpi: avoid assembler warning
hwrng: bcm63xx - fix non device tree compatibility
crypto: testmgr - allow rfc3686 aes-ctr variants in fips mode.
crypto: qat - The AE id should be less than the maximal AE number
lib/mpi: Endianness fix
crypto: rockchip - add hash support for crypto engine in rk3288
crypto: xts - fix compile errors
crypto: doc - add skcipher API documentation
crypto: doc - update AEAD AD handling
...
530 lines
15 KiB
C
530 lines
15 KiB
C
/*
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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 <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 <asm/hwcap.h>
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#include <asm/neon.h>
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#include <asm/hwcap.h>
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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 <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 <ard.biesheuvel@linaro.org>");
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MODULE_LICENSE("GPL v2");
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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[], u8 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[], u8 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[], u8 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[], u8 const rk[],
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int rounds, int blocks, u8 iv[]);
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asmlinkage void ce_aes_ctr_encrypt(u8 out[], u8 const in[], u8 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[], u8 const rk1[],
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int rounds, int blocks, u8 iv[],
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u8 const rk2[], int first);
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asmlinkage void ce_aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[],
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int rounds, int blocks, u8 iv[],
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u8 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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memcpy(ctx->key_enc, in_key, key_len);
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ctx->key_length = key_len;
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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_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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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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tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
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return -EINVAL;
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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_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_xts_ctx *ctx = crypto_tfm_ctx(tfm);
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int ret;
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ret = xts_check_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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if (!ret)
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return 0;
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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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static int ecb_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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struct blkcipher_walk walk;
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unsigned int blocks;
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int err;
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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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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) {
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ce_aes_ecb_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key_enc, num_rounds(ctx), blocks);
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err = blkcipher_walk_done(desc, &walk,
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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 ecb_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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struct blkcipher_walk walk;
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unsigned int blocks;
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int err;
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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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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) {
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ce_aes_ecb_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key_dec, num_rounds(ctx), blocks);
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err = blkcipher_walk_done(desc, &walk,
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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_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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struct blkcipher_walk walk;
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unsigned int blocks;
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int err;
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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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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) {
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ce_aes_cbc_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key_enc, num_rounds(ctx), blocks,
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walk.iv);
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err = blkcipher_walk_done(desc, &walk,
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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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struct blkcipher_walk walk;
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unsigned int blocks;
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int err;
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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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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) {
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ce_aes_cbc_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key_dec, num_rounds(ctx), blocks,
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walk.iv);
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err = blkcipher_walk_done(desc, &walk,
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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 ctr_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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struct blkcipher_walk walk;
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int err, 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_block(desc, &walk, AES_BLOCK_SIZE);
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kernel_neon_begin();
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while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) {
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ce_aes_ctr_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key_enc, num_rounds(ctx), blocks,
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walk.iv);
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nbytes -= blocks * AES_BLOCK_SIZE;
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if (nbytes && nbytes == walk.nbytes % AES_BLOCK_SIZE)
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break;
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err = blkcipher_walk_done(desc, &walk,
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walk.nbytes % AES_BLOCK_SIZE);
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}
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if (nbytes) {
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u8 *tdst = walk.dst.virt.addr + blocks * AES_BLOCK_SIZE;
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u8 *tsrc = walk.src.virt.addr + blocks * AES_BLOCK_SIZE;
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u8 __aligned(8) tail[AES_BLOCK_SIZE];
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/*
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* Minimum alignment is 8 bytes, so if nbytes is <= 8, we need
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* to tell aes_ctr_encrypt() to only read half a block.
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*/
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blocks = (nbytes <= 8) ? -1 : 1;
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ce_aes_ctr_encrypt(tail, tsrc, (u8 *)ctx->key_enc,
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num_rounds(ctx), blocks, walk.iv);
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memcpy(tdst, tail, nbytes);
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err = blkcipher_walk_done(desc, &walk, 0);
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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 xts_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_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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int err, first, rounds = num_rounds(&ctx->key1);
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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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ce_aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key1.key_enc, rounds, blocks,
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walk.iv, (u8 *)ctx->key2.key_enc, first);
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err = blkcipher_walk_done(desc, &walk,
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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 xts_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_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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int err, first, rounds = num_rounds(&ctx->key1);
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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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ce_aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr,
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(u8 *)ctx->key1.key_dec, rounds, blocks,
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walk.iv, (u8 *)ctx->key2.key_enc, first);
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err = blkcipher_walk_done(desc, &walk,
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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 = "__ecb-aes-ce",
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.cra_driver_name = "__driver-ecb-aes-ce",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_INTERNAL,
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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 = 0,
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.setkey = ce_aes_setkey,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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},
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}, {
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.cra_name = "__cbc-aes-ce",
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.cra_driver_name = "__driver-cbc-aes-ce",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_INTERNAL,
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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 = ce_aes_setkey,
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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 = "__ctr-aes-ce",
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.cra_driver_name = "__driver-ctr-aes-ce",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_INTERNAL,
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.cra_blocksize = 1,
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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 = ce_aes_setkey,
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.encrypt = ctr_encrypt,
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.decrypt = ctr_encrypt,
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},
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}, {
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.cra_name = "__xts-aes-ce",
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.cra_driver_name = "__driver-xts-aes-ce",
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.cra_priority = 0,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
|
|
CRYPTO_ALG_INTERNAL,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct crypto_aes_xts_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_blkcipher = {
|
|
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
|
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = xts_set_key,
|
|
.encrypt = xts_encrypt,
|
|
.decrypt = xts_decrypt,
|
|
},
|
|
}, {
|
|
.cra_name = "ecb(aes)",
|
|
.cra_driver_name = "ecb-aes-ce",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_ablkcipher = {
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = 0,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
}
|
|
}, {
|
|
.cra_name = "cbc(aes)",
|
|
.cra_driver_name = "cbc-aes-ce",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_ablkcipher = {
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
}
|
|
}, {
|
|
.cra_name = "ctr(aes)",
|
|
.cra_driver_name = "ctr-aes-ce",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_ablkcipher = {
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
}
|
|
}, {
|
|
.cra_name = "xts(aes)",
|
|
.cra_driver_name = "xts-aes-ce",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = ablk_init,
|
|
.cra_exit = ablk_exit,
|
|
.cra_ablkcipher = {
|
|
.min_keysize = 2 * AES_MIN_KEY_SIZE,
|
|
.max_keysize = 2 * AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = ablk_set_key,
|
|
.encrypt = ablk_encrypt,
|
|
.decrypt = ablk_decrypt,
|
|
}
|
|
} };
|
|
|
|
static int __init aes_init(void)
|
|
{
|
|
if (!(elf_hwcap2 & HWCAP2_AES))
|
|
return -ENODEV;
|
|
return crypto_register_algs(aes_algs, ARRAY_SIZE(aes_algs));
|
|
}
|
|
|
|
static void __exit aes_exit(void)
|
|
{
|
|
crypto_unregister_algs(aes_algs, ARRAY_SIZE(aes_algs));
|
|
}
|
|
|
|
module_init(aes_init);
|
|
module_exit(aes_exit);
|