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-rw-r--r--crypto/sha3_generic.c290
1 files changed, 0 insertions, 290 deletions
diff --git a/crypto/sha3_generic.c b/crypto/sha3_generic.c
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--- a/crypto/sha3_generic.c
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-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Cryptographic API.
- *
- * SHA-3, as specified in
- * https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf
- *
- * SHA-3 code by Jeff Garzik <jeff@garzik.org>
- * Ard Biesheuvel <ard.biesheuvel@linaro.org>
- */
-#include <crypto/internal/hash.h>
-#include <crypto/sha3.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/unaligned.h>
-
-/*
- * On some 32-bit architectures (h8300), GCC ends up using
- * over 1 KB of stack if we inline the round calculation into the loop
- * in keccakf(). On the other hand, on 64-bit architectures with plenty
- * of [64-bit wide] general purpose registers, not inlining it severely
- * hurts performance. So let's use 64-bitness as a heuristic to decide
- * whether to inline or not.
- */
-#ifdef CONFIG_64BIT
-#define SHA3_INLINE inline
-#else
-#define SHA3_INLINE noinline
-#endif
-
-#define KECCAK_ROUNDS 24
-
-static const u64 keccakf_rndc[24] = {
- 0x0000000000000001ULL, 0x0000000000008082ULL, 0x800000000000808aULL,
- 0x8000000080008000ULL, 0x000000000000808bULL, 0x0000000080000001ULL,
- 0x8000000080008081ULL, 0x8000000000008009ULL, 0x000000000000008aULL,
- 0x0000000000000088ULL, 0x0000000080008009ULL, 0x000000008000000aULL,
- 0x000000008000808bULL, 0x800000000000008bULL, 0x8000000000008089ULL,
- 0x8000000000008003ULL, 0x8000000000008002ULL, 0x8000000000000080ULL,
- 0x000000000000800aULL, 0x800000008000000aULL, 0x8000000080008081ULL,
- 0x8000000000008080ULL, 0x0000000080000001ULL, 0x8000000080008008ULL
-};
-
-/* update the state with given number of rounds */
-
-static SHA3_INLINE void keccakf_round(u64 st[25])
-{
- u64 t[5], tt, bc[5];
-
- /* Theta */
- bc[0] = st[0] ^ st[5] ^ st[10] ^ st[15] ^ st[20];
- bc[1] = st[1] ^ st[6] ^ st[11] ^ st[16] ^ st[21];
- bc[2] = st[2] ^ st[7] ^ st[12] ^ st[17] ^ st[22];
- bc[3] = st[3] ^ st[8] ^ st[13] ^ st[18] ^ st[23];
- bc[4] = st[4] ^ st[9] ^ st[14] ^ st[19] ^ st[24];
-
- t[0] = bc[4] ^ rol64(bc[1], 1);
- t[1] = bc[0] ^ rol64(bc[2], 1);
- t[2] = bc[1] ^ rol64(bc[3], 1);
- t[3] = bc[2] ^ rol64(bc[4], 1);
- t[4] = bc[3] ^ rol64(bc[0], 1);
-
- st[0] ^= t[0];
-
- /* Rho Pi */
- tt = st[1];
- st[ 1] = rol64(st[ 6] ^ t[1], 44);
- st[ 6] = rol64(st[ 9] ^ t[4], 20);
- st[ 9] = rol64(st[22] ^ t[2], 61);
- st[22] = rol64(st[14] ^ t[4], 39);
- st[14] = rol64(st[20] ^ t[0], 18);
- st[20] = rol64(st[ 2] ^ t[2], 62);
- st[ 2] = rol64(st[12] ^ t[2], 43);
- st[12] = rol64(st[13] ^ t[3], 25);
- st[13] = rol64(st[19] ^ t[4], 8);
- st[19] = rol64(st[23] ^ t[3], 56);
- st[23] = rol64(st[15] ^ t[0], 41);
- st[15] = rol64(st[ 4] ^ t[4], 27);
- st[ 4] = rol64(st[24] ^ t[4], 14);
- st[24] = rol64(st[21] ^ t[1], 2);
- st[21] = rol64(st[ 8] ^ t[3], 55);
- st[ 8] = rol64(st[16] ^ t[1], 45);
- st[16] = rol64(st[ 5] ^ t[0], 36);
- st[ 5] = rol64(st[ 3] ^ t[3], 28);
- st[ 3] = rol64(st[18] ^ t[3], 21);
- st[18] = rol64(st[17] ^ t[2], 15);
- st[17] = rol64(st[11] ^ t[1], 10);
- st[11] = rol64(st[ 7] ^ t[2], 6);
- st[ 7] = rol64(st[10] ^ t[0], 3);
- st[10] = rol64( tt ^ t[1], 1);
-
- /* Chi */
- bc[ 0] = ~st[ 1] & st[ 2];
- bc[ 1] = ~st[ 2] & st[ 3];
- bc[ 2] = ~st[ 3] & st[ 4];
- bc[ 3] = ~st[ 4] & st[ 0];
- bc[ 4] = ~st[ 0] & st[ 1];
- st[ 0] ^= bc[ 0];
- st[ 1] ^= bc[ 1];
- st[ 2] ^= bc[ 2];
- st[ 3] ^= bc[ 3];
- st[ 4] ^= bc[ 4];
-
- bc[ 0] = ~st[ 6] & st[ 7];
- bc[ 1] = ~st[ 7] & st[ 8];
- bc[ 2] = ~st[ 8] & st[ 9];
- bc[ 3] = ~st[ 9] & st[ 5];
- bc[ 4] = ~st[ 5] & st[ 6];
- st[ 5] ^= bc[ 0];
- st[ 6] ^= bc[ 1];
- st[ 7] ^= bc[ 2];
- st[ 8] ^= bc[ 3];
- st[ 9] ^= bc[ 4];
-
- bc[ 0] = ~st[11] & st[12];
- bc[ 1] = ~st[12] & st[13];
- bc[ 2] = ~st[13] & st[14];
- bc[ 3] = ~st[14] & st[10];
- bc[ 4] = ~st[10] & st[11];
- st[10] ^= bc[ 0];
- st[11] ^= bc[ 1];
- st[12] ^= bc[ 2];
- st[13] ^= bc[ 3];
- st[14] ^= bc[ 4];
-
- bc[ 0] = ~st[16] & st[17];
- bc[ 1] = ~st[17] & st[18];
- bc[ 2] = ~st[18] & st[19];
- bc[ 3] = ~st[19] & st[15];
- bc[ 4] = ~st[15] & st[16];
- st[15] ^= bc[ 0];
- st[16] ^= bc[ 1];
- st[17] ^= bc[ 2];
- st[18] ^= bc[ 3];
- st[19] ^= bc[ 4];
-
- bc[ 0] = ~st[21] & st[22];
- bc[ 1] = ~st[22] & st[23];
- bc[ 2] = ~st[23] & st[24];
- bc[ 3] = ~st[24] & st[20];
- bc[ 4] = ~st[20] & st[21];
- st[20] ^= bc[ 0];
- st[21] ^= bc[ 1];
- st[22] ^= bc[ 2];
- st[23] ^= bc[ 3];
- st[24] ^= bc[ 4];
-}
-
-static void keccakf(u64 st[25])
-{
- int round;
-
- for (round = 0; round < KECCAK_ROUNDS; round++) {
- keccakf_round(st);
- /* Iota */
- st[0] ^= keccakf_rndc[round];
- }
-}
-
-int crypto_sha3_init(struct shash_desc *desc)
-{
- struct sha3_state *sctx = shash_desc_ctx(desc);
-
- memset(sctx->st, 0, sizeof(sctx->st));
- return 0;
-}
-EXPORT_SYMBOL(crypto_sha3_init);
-
-static int crypto_sha3_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- unsigned int rsiz = crypto_shash_blocksize(desc->tfm);
- struct sha3_state *sctx = shash_desc_ctx(desc);
- unsigned int rsizw = rsiz / 8;
-
- do {
- int i;
-
- for (i = 0; i < rsizw; i++)
- sctx->st[i] ^= get_unaligned_le64(data + 8 * i);
- keccakf(sctx->st);
-
- data += rsiz;
- len -= rsiz;
- } while (len >= rsiz);
- return len;
-}
-
-static int crypto_sha3_finup(struct shash_desc *desc, const u8 *src,
- unsigned int len, u8 *out)
-{
- unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
- unsigned int rsiz = crypto_shash_blocksize(desc->tfm);
- struct sha3_state *sctx = shash_desc_ctx(desc);
- __le64 block[SHA3_224_BLOCK_SIZE / 8] = {};
- __le64 *digest = (__le64 *)out;
- unsigned int rsizw = rsiz / 8;
- u8 *p;
- int i;
-
- p = memcpy(block, src, len);
- p[len++] = 0x06;
- p[rsiz - 1] |= 0x80;
-
- for (i = 0; i < rsizw; i++)
- sctx->st[i] ^= le64_to_cpu(block[i]);
- memzero_explicit(block, sizeof(block));
-
- keccakf(sctx->st);
-
- for (i = 0; i < digest_size / 8; i++)
- put_unaligned_le64(sctx->st[i], digest++);
-
- if (digest_size & 4)
- put_unaligned_le32(sctx->st[i], (__le32 *)digest);
-
- return 0;
-}
-
-static struct shash_alg algs[] = { {
- .digestsize = SHA3_224_DIGEST_SIZE,
- .init = crypto_sha3_init,
- .update = crypto_sha3_update,
- .finup = crypto_sha3_finup,
- .descsize = SHA3_STATE_SIZE,
- .base.cra_name = "sha3-224",
- .base.cra_driver_name = "sha3-224-generic",
- .base.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .base.cra_blocksize = SHA3_224_BLOCK_SIZE,
- .base.cra_module = THIS_MODULE,
-}, {
- .digestsize = SHA3_256_DIGEST_SIZE,
- .init = crypto_sha3_init,
- .update = crypto_sha3_update,
- .finup = crypto_sha3_finup,
- .descsize = SHA3_STATE_SIZE,
- .base.cra_name = "sha3-256",
- .base.cra_driver_name = "sha3-256-generic",
- .base.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .base.cra_blocksize = SHA3_256_BLOCK_SIZE,
- .base.cra_module = THIS_MODULE,
-}, {
- .digestsize = SHA3_384_DIGEST_SIZE,
- .init = crypto_sha3_init,
- .update = crypto_sha3_update,
- .finup = crypto_sha3_finup,
- .descsize = SHA3_STATE_SIZE,
- .base.cra_name = "sha3-384",
- .base.cra_driver_name = "sha3-384-generic",
- .base.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .base.cra_blocksize = SHA3_384_BLOCK_SIZE,
- .base.cra_module = THIS_MODULE,
-}, {
- .digestsize = SHA3_512_DIGEST_SIZE,
- .init = crypto_sha3_init,
- .update = crypto_sha3_update,
- .finup = crypto_sha3_finup,
- .descsize = SHA3_STATE_SIZE,
- .base.cra_name = "sha3-512",
- .base.cra_driver_name = "sha3-512-generic",
- .base.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
- .base.cra_blocksize = SHA3_512_BLOCK_SIZE,
- .base.cra_module = THIS_MODULE,
-} };
-
-static int __init sha3_generic_mod_init(void)
-{
- return crypto_register_shashes(algs, ARRAY_SIZE(algs));
-}
-
-static void __exit sha3_generic_mod_fini(void)
-{
- crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
-}
-
-module_init(sha3_generic_mod_init);
-module_exit(sha3_generic_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SHA-3 Secure Hash Algorithm");
-
-MODULE_ALIAS_CRYPTO("sha3-224");
-MODULE_ALIAS_CRYPTO("sha3-224-generic");
-MODULE_ALIAS_CRYPTO("sha3-256");
-MODULE_ALIAS_CRYPTO("sha3-256-generic");
-MODULE_ALIAS_CRYPTO("sha3-384");
-MODULE_ALIAS_CRYPTO("sha3-384-generic");
-MODULE_ALIAS_CRYPTO("sha3-512");
-MODULE_ALIAS_CRYPTO("sha3-512-generic");
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-03 17:14:37 +0000