diff options
Diffstat (limited to 'crypto/morus640.c')
| -rw-r--r-- | crypto/morus640.c | 533 |
1 files changed, 0 insertions, 533 deletions
diff --git a/crypto/morus640.c b/crypto/morus640.c deleted file mode 100644 index ae5aa9482cb4..000000000000 --- a/crypto/morus640.c +++ /dev/null @@ -1,533 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * The MORUS-640 Authenticated-Encryption Algorithm - * - * Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com> - * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved. - */ - -#include <asm/unaligned.h> -#include <crypto/algapi.h> -#include <crypto/internal/aead.h> -#include <crypto/internal/skcipher.h> -#include <crypto/morus_common.h> -#include <crypto/scatterwalk.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/scatterlist.h> - -#define MORUS640_WORD_SIZE 4 -#define MORUS640_BLOCK_SIZE (MORUS_BLOCK_WORDS * MORUS640_WORD_SIZE) -#define MORUS640_BLOCK_ALIGN (__alignof__(__le32)) -#define MORUS640_ALIGNED(p) IS_ALIGNED((uintptr_t)p, MORUS640_BLOCK_ALIGN) - -struct morus640_block { - u32 words[MORUS_BLOCK_WORDS]; -}; - -union morus640_block_in { - __le32 words[MORUS_BLOCK_WORDS]; - u8 bytes[MORUS640_BLOCK_SIZE]; -}; - -struct morus640_state { - struct morus640_block s[MORUS_STATE_BLOCKS]; -}; - -struct morus640_ctx { - struct morus640_block key; -}; - -struct morus640_ops { - int (*skcipher_walk_init)(struct skcipher_walk *walk, - struct aead_request *req, bool atomic); - - void (*crypt_chunk)(struct morus640_state *state, - u8 *dst, const u8 *src, unsigned int size); -}; - -static const struct morus640_block crypto_morus640_const[2] = { - { .words = { - U32_C(0x02010100), - U32_C(0x0d080503), - U32_C(0x59372215), - U32_C(0x6279e990), - } }, - { .words = { - U32_C(0x55183ddb), - U32_C(0xf12fc26d), - U32_C(0x42311120), - U32_C(0xdd28b573), - } }, -}; - -static void crypto_morus640_round(struct morus640_block *b0, - struct morus640_block *b1, - struct morus640_block *b2, - struct morus640_block *b3, - struct morus640_block *b4, - const struct morus640_block *m, - unsigned int b, unsigned int w) -{ - unsigned int i; - struct morus640_block tmp; - - for (i = 0; i < MORUS_BLOCK_WORDS; i++) { - b0->words[i] ^= b1->words[i] & b2->words[i]; - b0->words[i] ^= b3->words[i]; - b0->words[i] ^= m->words[i]; - b0->words[i] = rol32(b0->words[i], b); - } - - tmp = *b3; - for (i = 0; i < MORUS_BLOCK_WORDS; i++) - b3->words[(i + w) % MORUS_BLOCK_WORDS] = tmp.words[i]; -} - -static void crypto_morus640_update(struct morus640_state *state, - const struct morus640_block *m) -{ - static const struct morus640_block z = {}; - - struct morus640_block *s = state->s; - - crypto_morus640_round(&s[0], &s[1], &s[2], &s[3], &s[4], &z, 5, 1); - crypto_morus640_round(&s[1], &s[2], &s[3], &s[4], &s[0], m, 31, 2); - crypto_morus640_round(&s[2], &s[3], &s[4], &s[0], &s[1], m, 7, 3); - crypto_morus640_round(&s[3], &s[4], &s[0], &s[1], &s[2], m, 22, 2); - crypto_morus640_round(&s[4], &s[0], &s[1], &s[2], &s[3], m, 13, 1); -} - -static void crypto_morus640_load_a(struct morus640_block *dst, const u8 *src) -{ - unsigned int i; - for (i = 0; i < MORUS_BLOCK_WORDS; i++) { - dst->words[i] = le32_to_cpu(*(const __le32 *)src); - src += MORUS640_WORD_SIZE; - } -} - -static void crypto_morus640_load_u(struct morus640_block *dst, const u8 *src) -{ - unsigned int i; - for (i = 0; i < MORUS_BLOCK_WORDS; i++) { - dst->words[i] = get_unaligned_le32(src); - src += MORUS640_WORD_SIZE; - } -} - -static void crypto_morus640_load(struct morus640_block *dst, const u8 *src) -{ - if (MORUS640_ALIGNED(src)) - crypto_morus640_load_a(dst, src); - else - crypto_morus640_load_u(dst, src); -} - -static void crypto_morus640_store_a(u8 *dst, const struct morus640_block *src) -{ - unsigned int i; - for (i = 0; i < MORUS_BLOCK_WORDS; i++) { - *(__le32 *)dst = cpu_to_le32(src->words[i]); - dst += MORUS640_WORD_SIZE; - } -} - -static void crypto_morus640_store_u(u8 *dst, const struct morus640_block *src) -{ - unsigned int i; - for (i = 0; i < MORUS_BLOCK_WORDS; i++) { - put_unaligned_le32(src->words[i], dst); - dst += MORUS640_WORD_SIZE; - } -} - -static void crypto_morus640_store(u8 *dst, const struct morus640_block *src) -{ - if (MORUS640_ALIGNED(dst)) - crypto_morus640_store_a(dst, src); - else - crypto_morus640_store_u(dst, src); -} - -static void crypto_morus640_ad(struct morus640_state *state, const u8 *src, - unsigned int size) -{ - struct morus640_block m; - - if (MORUS640_ALIGNED(src)) { - while (size >= MORUS640_BLOCK_SIZE) { - crypto_morus640_load_a(&m, src); - crypto_morus640_update(state, &m); - - size -= MORUS640_BLOCK_SIZE; - src += MORUS640_BLOCK_SIZE; - } - } else { - while (size >= MORUS640_BLOCK_SIZE) { - crypto_morus640_load_u(&m, src); - crypto_morus640_update(state, &m); - - size -= MORUS640_BLOCK_SIZE; - src += MORUS640_BLOCK_SIZE; - } - } -} - -static void crypto_morus640_core(const struct morus640_state *state, - struct morus640_block *blk) -{ - unsigned int i; - - for (i = 0; i < MORUS_BLOCK_WORDS; i++) - blk->words[(i + 3) % MORUS_BLOCK_WORDS] ^= state->s[1].words[i]; - - for (i = 0; i < MORUS_BLOCK_WORDS; i++) { - blk->words[i] ^= state->s[0].words[i]; - blk->words[i] ^= state->s[2].words[i] & state->s[3].words[i]; - } -} - -static void crypto_morus640_encrypt_chunk(struct morus640_state *state, u8 *dst, - const u8 *src, unsigned int size) -{ - struct morus640_block c, m; - - if (MORUS640_ALIGNED(src) && MORUS640_ALIGNED(dst)) { - while (size >= MORUS640_BLOCK_SIZE) { - crypto_morus640_load_a(&m, src); - c = m; - crypto_morus640_core(state, &c); - crypto_morus640_store_a(dst, &c); - crypto_morus640_update(state, &m); - - src += MORUS640_BLOCK_SIZE; - dst += MORUS640_BLOCK_SIZE; - size -= MORUS640_BLOCK_SIZE; - } - } else { - while (size >= MORUS640_BLOCK_SIZE) { - crypto_morus640_load_u(&m, src); - c = m; - crypto_morus640_core(state, &c); - crypto_morus640_store_u(dst, &c); - crypto_morus640_update(state, &m); - - src += MORUS640_BLOCK_SIZE; - dst += MORUS640_BLOCK_SIZE; - size -= MORUS640_BLOCK_SIZE; - } - } - - if (size > 0) { - union morus640_block_in tail; - - memcpy(tail.bytes, src, size); - memset(tail.bytes + size, 0, MORUS640_BLOCK_SIZE - size); - - crypto_morus640_load_a(&m, tail.bytes); - c = m; - crypto_morus640_core(state, &c); - crypto_morus640_store_a(tail.bytes, &c); - crypto_morus640_update(state, &m); - - memcpy(dst, tail.bytes, size); - } -} - -static void crypto_morus640_decrypt_chunk(struct morus640_state *state, u8 *dst, - const u8 *src, unsigned int size) -{ - struct morus640_block m; - - if (MORUS640_ALIGNED(src) && MORUS640_ALIGNED(dst)) { - while (size >= MORUS640_BLOCK_SIZE) { - crypto_morus640_load_a(&m, src); - crypto_morus640_core(state, &m); - crypto_morus640_store_a(dst, &m); - crypto_morus640_update(state, &m); - - src += MORUS640_BLOCK_SIZE; - dst += MORUS640_BLOCK_SIZE; - size -= MORUS640_BLOCK_SIZE; - } - } else { - while (size >= MORUS640_BLOCK_SIZE) { - crypto_morus640_load_u(&m, src); - crypto_morus640_core(state, &m); - crypto_morus640_store_u(dst, &m); - crypto_morus640_update(state, &m); - - src += MORUS640_BLOCK_SIZE; - dst += MORUS640_BLOCK_SIZE; - size -= MORUS640_BLOCK_SIZE; - } - } - - if (size > 0) { - union morus640_block_in tail; - - memcpy(tail.bytes, src, size); - memset(tail.bytes + size, 0, MORUS640_BLOCK_SIZE - size); - - crypto_morus640_load_a(&m, tail.bytes); - crypto_morus640_core(state, &m); - crypto_morus640_store_a(tail.bytes, &m); - memset(tail.bytes + size, 0, MORUS640_BLOCK_SIZE - size); - crypto_morus640_load_a(&m, tail.bytes); - crypto_morus640_update(state, &m); - - memcpy(dst, tail.bytes, size); - } -} - -static void crypto_morus640_init(struct morus640_state *state, - const struct morus640_block *key, - const u8 *iv) -{ - static const struct morus640_block z = {}; - - unsigned int i; - - crypto_morus640_load(&state->s[0], iv); - state->s[1] = *key; - for (i = 0; i < MORUS_BLOCK_WORDS; i++) - state->s[2].words[i] = U32_C(0xFFFFFFFF); - state->s[3] = crypto_morus640_const[0]; - state->s[4] = crypto_morus640_const[1]; - - for (i = 0; i < 16; i++) - crypto_morus640_update(state, &z); - - for (i = 0; i < MORUS_BLOCK_WORDS; i++) - state->s[1].words[i] ^= key->words[i]; -} - -static void crypto_morus640_process_ad(struct morus640_state *state, - struct scatterlist *sg_src, - unsigned int assoclen) -{ - struct scatter_walk walk; - struct morus640_block m; - union morus640_block_in buf; - unsigned int pos = 0; - - scatterwalk_start(&walk, sg_src); - while (assoclen != 0) { - unsigned int size = scatterwalk_clamp(&walk, assoclen); - unsigned int left = size; - void *mapped = scatterwalk_map(&walk); - const u8 *src = (const u8 *)mapped; - - if (pos + size >= MORUS640_BLOCK_SIZE) { - if (pos > 0) { - unsigned int fill = MORUS640_BLOCK_SIZE - pos; - memcpy(buf.bytes + pos, src, fill); - - crypto_morus640_load_a(&m, buf.bytes); - crypto_morus640_update(state, &m); - - pos = 0; - left -= fill; - src += fill; - } - - crypto_morus640_ad(state, src, left); - src += left & ~(MORUS640_BLOCK_SIZE - 1); - left &= MORUS640_BLOCK_SIZE - 1; - } - - memcpy(buf.bytes + pos, src, left); - - pos += left; - assoclen -= size; - scatterwalk_unmap(mapped); - scatterwalk_advance(&walk, size); - scatterwalk_done(&walk, 0, assoclen); - } - - if (pos > 0) { - memset(buf.bytes + pos, 0, MORUS640_BLOCK_SIZE - pos); - - crypto_morus640_load_a(&m, buf.bytes); - crypto_morus640_update(state, &m); - } -} - -static void crypto_morus640_process_crypt(struct morus640_state *state, - struct aead_request *req, - const struct morus640_ops *ops) -{ - struct skcipher_walk walk; - - ops->skcipher_walk_init(&walk, req, false); - - while (walk.nbytes) { - unsigned int nbytes = walk.nbytes; - - if (nbytes < walk.total) - nbytes = round_down(nbytes, walk.stride); - - ops->crypt_chunk(state, walk.dst.virt.addr, walk.src.virt.addr, - nbytes); - - skcipher_walk_done(&walk, walk.nbytes - nbytes); - } -} - -static void crypto_morus640_final(struct morus640_state *state, - struct morus640_block *tag_xor, - u64 assoclen, u64 cryptlen) -{ - struct morus640_block tmp; - unsigned int i; - - tmp.words[0] = lower_32_bits(assoclen * 8); - tmp.words[1] = upper_32_bits(assoclen * 8); - tmp.words[2] = lower_32_bits(cryptlen * 8); - tmp.words[3] = upper_32_bits(cryptlen * 8); - - for (i = 0; i < MORUS_BLOCK_WORDS; i++) - state->s[4].words[i] ^= state->s[0].words[i]; - - for (i = 0; i < 10; i++) - crypto_morus640_update(state, &tmp); - - crypto_morus640_core(state, tag_xor); -} - -static int crypto_morus640_setkey(struct crypto_aead *aead, const u8 *key, - unsigned int keylen) -{ - struct morus640_ctx *ctx = crypto_aead_ctx(aead); - - if (keylen != MORUS640_BLOCK_SIZE) { - crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN); - return -EINVAL; - } - - crypto_morus640_load(&ctx->key, key); - return 0; -} - -static int crypto_morus640_setauthsize(struct crypto_aead *tfm, - unsigned int authsize) -{ - return (authsize <= MORUS_MAX_AUTH_SIZE) ? 0 : -EINVAL; -} - -static void crypto_morus640_crypt(struct aead_request *req, - struct morus640_block *tag_xor, - unsigned int cryptlen, - const struct morus640_ops *ops) -{ - struct crypto_aead *tfm = crypto_aead_reqtfm(req); - struct morus640_ctx *ctx = crypto_aead_ctx(tfm); - struct morus640_state state; - - crypto_morus640_init(&state, &ctx->key, req->iv); - crypto_morus640_process_ad(&state, req->src, req->assoclen); - crypto_morus640_process_crypt(&state, req, ops); - crypto_morus640_final(&state, tag_xor, req->assoclen, cryptlen); -} - -static int crypto_morus640_encrypt(struct aead_request *req) -{ - static const struct morus640_ops ops = { - .skcipher_walk_init = skcipher_walk_aead_encrypt, - .crypt_chunk = crypto_morus640_encrypt_chunk, - }; - - struct crypto_aead *tfm = crypto_aead_reqtfm(req); - struct morus640_block tag = {}; - union morus640_block_in tag_out; - unsigned int authsize = crypto_aead_authsize(tfm); - unsigned int cryptlen = req->cryptlen; - - crypto_morus640_crypt(req, &tag, cryptlen, &ops); - crypto_morus640_store(tag_out.bytes, &tag); - - scatterwalk_map_and_copy(tag_out.bytes, req->dst, - req->assoclen + cryptlen, authsize, 1); - return 0; -} - -static int crypto_morus640_decrypt(struct aead_request *req) -{ - static const struct morus640_ops ops = { - .skcipher_walk_init = skcipher_walk_aead_decrypt, - .crypt_chunk = crypto_morus640_decrypt_chunk, - }; - static const u8 zeros[MORUS640_BLOCK_SIZE] = {}; - - struct crypto_aead *tfm = crypto_aead_reqtfm(req); - union morus640_block_in tag_in; - struct morus640_block tag; - unsigned int authsize = crypto_aead_authsize(tfm); - unsigned int cryptlen = req->cryptlen - authsize; - - scatterwalk_map_and_copy(tag_in.bytes, req->src, - req->assoclen + cryptlen, authsize, 0); - - crypto_morus640_load(&tag, tag_in.bytes); - crypto_morus640_crypt(req, &tag, cryptlen, &ops); - crypto_morus640_store(tag_in.bytes, &tag); - - return crypto_memneq(tag_in.bytes, zeros, authsize) ? -EBADMSG : 0; -} - -static int crypto_morus640_init_tfm(struct crypto_aead *tfm) -{ - return 0; -} - -static void crypto_morus640_exit_tfm(struct crypto_aead *tfm) -{ -} - -static struct aead_alg crypto_morus640_alg = { - .setkey = crypto_morus640_setkey, - .setauthsize = crypto_morus640_setauthsize, - .encrypt = crypto_morus640_encrypt, - .decrypt = crypto_morus640_decrypt, - .init = crypto_morus640_init_tfm, - .exit = crypto_morus640_exit_tfm, - - .ivsize = MORUS_NONCE_SIZE, - .maxauthsize = MORUS_MAX_AUTH_SIZE, - .chunksize = MORUS640_BLOCK_SIZE, - - .base = { - .cra_blocksize = 1, - .cra_ctxsize = sizeof(struct morus640_ctx), - .cra_alignmask = 0, - - .cra_priority = 100, - - .cra_name = "morus640", - .cra_driver_name = "morus640-generic", - - .cra_module = THIS_MODULE, - } -}; - -static int __init crypto_morus640_module_init(void) -{ - return crypto_register_aead(&crypto_morus640_alg); -} - -static void __exit crypto_morus640_module_exit(void) -{ - crypto_unregister_aead(&crypto_morus640_alg); -} - -subsys_initcall(crypto_morus640_module_init); -module_exit(crypto_morus640_module_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Ondrej Mosnacek <omosnacek@gmail.com>"); -MODULE_DESCRIPTION("MORUS-640 AEAD algorithm"); -MODULE_ALIAS_CRYPTO("morus640"); -MODULE_ALIAS_CRYPTO("morus640-generic"); |