Jeff Garzik | 53964b9 | 2016-06-17 10:30:35 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * SHA-3, as specified in |
| 5 | * http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf |
| 6 | * |
| 7 | * SHA-3 code by Jeff Garzik <jeff@garzik.org> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the Free |
| 11 | * Software Foundation; either version 2 of the License, or (at your option)• |
| 12 | * any later version. |
| 13 | * |
| 14 | */ |
| 15 | #include <crypto/internal/hash.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/types.h> |
| 19 | #include <crypto/sha3.h> |
| 20 | #include <asm/byteorder.h> |
Ard Biesheuvel | 1ce8e52 | 2018-01-19 12:04:33 +0000 | [diff] [blame] | 21 | #include <asm/unaligned.h> |
Jeff Garzik | 53964b9 | 2016-06-17 10:30:35 +0530 | [diff] [blame] | 22 | |
| 23 | #define KECCAK_ROUNDS 24 |
| 24 | |
| 25 | #define ROTL64(x, y) (((x) << (y)) | ((x) >> (64 - (y)))) |
| 26 | |
| 27 | static const u64 keccakf_rndc[24] = { |
Geert Uytterhoeven | f743e70 | 2016-08-03 19:37:03 +0200 | [diff] [blame] | 28 | 0x0000000000000001ULL, 0x0000000000008082ULL, 0x800000000000808aULL, |
| 29 | 0x8000000080008000ULL, 0x000000000000808bULL, 0x0000000080000001ULL, |
| 30 | 0x8000000080008081ULL, 0x8000000000008009ULL, 0x000000000000008aULL, |
| 31 | 0x0000000000000088ULL, 0x0000000080008009ULL, 0x000000008000000aULL, |
| 32 | 0x000000008000808bULL, 0x800000000000008bULL, 0x8000000000008089ULL, |
| 33 | 0x8000000000008003ULL, 0x8000000000008002ULL, 0x8000000000000080ULL, |
| 34 | 0x000000000000800aULL, 0x800000008000000aULL, 0x8000000080008081ULL, |
| 35 | 0x8000000000008080ULL, 0x0000000080000001ULL, 0x8000000080008008ULL |
Jeff Garzik | 53964b9 | 2016-06-17 10:30:35 +0530 | [diff] [blame] | 36 | }; |
| 37 | |
| 38 | static const int keccakf_rotc[24] = { |
| 39 | 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14, |
| 40 | 27, 41, 56, 8, 25, 43, 62, 18, 39, 61, 20, 44 |
| 41 | }; |
| 42 | |
| 43 | static const int keccakf_piln[24] = { |
| 44 | 10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4, |
| 45 | 15, 23, 19, 13, 12, 2, 20, 14, 22, 9, 6, 1 |
| 46 | }; |
| 47 | |
| 48 | /* update the state with given number of rounds */ |
| 49 | |
| 50 | static void keccakf(u64 st[25]) |
| 51 | { |
| 52 | int i, j, round; |
| 53 | u64 t, bc[5]; |
| 54 | |
| 55 | for (round = 0; round < KECCAK_ROUNDS; round++) { |
| 56 | |
| 57 | /* Theta */ |
| 58 | for (i = 0; i < 5; i++) |
| 59 | bc[i] = st[i] ^ st[i + 5] ^ st[i + 10] ^ st[i + 15] |
| 60 | ^ st[i + 20]; |
| 61 | |
| 62 | for (i = 0; i < 5; i++) { |
| 63 | t = bc[(i + 4) % 5] ^ ROTL64(bc[(i + 1) % 5], 1); |
| 64 | for (j = 0; j < 25; j += 5) |
| 65 | st[j + i] ^= t; |
| 66 | } |
| 67 | |
| 68 | /* Rho Pi */ |
| 69 | t = st[1]; |
| 70 | for (i = 0; i < 24; i++) { |
| 71 | j = keccakf_piln[i]; |
| 72 | bc[0] = st[j]; |
| 73 | st[j] = ROTL64(t, keccakf_rotc[i]); |
| 74 | t = bc[0]; |
| 75 | } |
| 76 | |
| 77 | /* Chi */ |
| 78 | for (j = 0; j < 25; j += 5) { |
| 79 | for (i = 0; i < 5; i++) |
| 80 | bc[i] = st[j + i]; |
| 81 | for (i = 0; i < 5; i++) |
| 82 | st[j + i] ^= (~bc[(i + 1) % 5]) & |
| 83 | bc[(i + 2) % 5]; |
| 84 | } |
| 85 | |
| 86 | /* Iota */ |
| 87 | st[0] ^= keccakf_rndc[round]; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | static void sha3_init(struct sha3_state *sctx, unsigned int digest_sz) |
| 92 | { |
| 93 | memset(sctx, 0, sizeof(*sctx)); |
| 94 | sctx->md_len = digest_sz; |
| 95 | sctx->rsiz = 200 - 2 * digest_sz; |
| 96 | sctx->rsizw = sctx->rsiz / 8; |
| 97 | } |
| 98 | |
| 99 | static int sha3_224_init(struct shash_desc *desc) |
| 100 | { |
| 101 | struct sha3_state *sctx = shash_desc_ctx(desc); |
| 102 | |
| 103 | sha3_init(sctx, SHA3_224_DIGEST_SIZE); |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static int sha3_256_init(struct shash_desc *desc) |
| 108 | { |
| 109 | struct sha3_state *sctx = shash_desc_ctx(desc); |
| 110 | |
| 111 | sha3_init(sctx, SHA3_256_DIGEST_SIZE); |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static int sha3_384_init(struct shash_desc *desc) |
| 116 | { |
| 117 | struct sha3_state *sctx = shash_desc_ctx(desc); |
| 118 | |
| 119 | sha3_init(sctx, SHA3_384_DIGEST_SIZE); |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | static int sha3_512_init(struct shash_desc *desc) |
| 124 | { |
| 125 | struct sha3_state *sctx = shash_desc_ctx(desc); |
| 126 | |
| 127 | sha3_init(sctx, SHA3_512_DIGEST_SIZE); |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static int sha3_update(struct shash_desc *desc, const u8 *data, |
| 132 | unsigned int len) |
| 133 | { |
| 134 | struct sha3_state *sctx = shash_desc_ctx(desc); |
| 135 | unsigned int done; |
| 136 | const u8 *src; |
| 137 | |
| 138 | done = 0; |
| 139 | src = data; |
| 140 | |
| 141 | if ((sctx->partial + len) > (sctx->rsiz - 1)) { |
| 142 | if (sctx->partial) { |
| 143 | done = -sctx->partial; |
| 144 | memcpy(sctx->buf + sctx->partial, data, |
| 145 | done + sctx->rsiz); |
| 146 | src = sctx->buf; |
| 147 | } |
| 148 | |
| 149 | do { |
| 150 | unsigned int i; |
| 151 | |
| 152 | for (i = 0; i < sctx->rsizw; i++) |
Ard Biesheuvel | 1ce8e52 | 2018-01-19 12:04:33 +0000 | [diff] [blame] | 153 | sctx->st[i] ^= get_unaligned_le64(src + 8 * i); |
Jeff Garzik | 53964b9 | 2016-06-17 10:30:35 +0530 | [diff] [blame] | 154 | keccakf(sctx->st); |
| 155 | |
| 156 | done += sctx->rsiz; |
| 157 | src = data + done; |
| 158 | } while (done + (sctx->rsiz - 1) < len); |
| 159 | |
| 160 | sctx->partial = 0; |
| 161 | } |
| 162 | memcpy(sctx->buf + sctx->partial, src, len - done); |
| 163 | sctx->partial += (len - done); |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | static int sha3_final(struct shash_desc *desc, u8 *out) |
| 169 | { |
| 170 | struct sha3_state *sctx = shash_desc_ctx(desc); |
| 171 | unsigned int i, inlen = sctx->partial; |
| 172 | |
| 173 | sctx->buf[inlen++] = 0x06; |
| 174 | memset(sctx->buf + inlen, 0, sctx->rsiz - inlen); |
| 175 | sctx->buf[sctx->rsiz - 1] |= 0x80; |
| 176 | |
| 177 | for (i = 0; i < sctx->rsizw; i++) |
Ard Biesheuvel | 1ce8e52 | 2018-01-19 12:04:33 +0000 | [diff] [blame] | 178 | sctx->st[i] ^= get_unaligned_le64(sctx->buf + 8 * i); |
Jeff Garzik | 53964b9 | 2016-06-17 10:30:35 +0530 | [diff] [blame] | 179 | |
| 180 | keccakf(sctx->st); |
| 181 | |
| 182 | for (i = 0; i < sctx->rsizw; i++) |
| 183 | sctx->st[i] = cpu_to_le64(sctx->st[i]); |
| 184 | |
| 185 | memcpy(out, sctx->st, sctx->md_len); |
| 186 | |
| 187 | memset(sctx, 0, sizeof(*sctx)); |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static struct shash_alg sha3_224 = { |
| 192 | .digestsize = SHA3_224_DIGEST_SIZE, |
| 193 | .init = sha3_224_init, |
| 194 | .update = sha3_update, |
| 195 | .final = sha3_final, |
| 196 | .descsize = sizeof(struct sha3_state), |
| 197 | .base = { |
| 198 | .cra_name = "sha3-224", |
| 199 | .cra_driver_name = "sha3-224-generic", |
| 200 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 201 | .cra_blocksize = SHA3_224_BLOCK_SIZE, |
| 202 | .cra_module = THIS_MODULE, |
| 203 | } |
| 204 | }; |
| 205 | |
| 206 | static struct shash_alg sha3_256 = { |
| 207 | .digestsize = SHA3_256_DIGEST_SIZE, |
| 208 | .init = sha3_256_init, |
| 209 | .update = sha3_update, |
| 210 | .final = sha3_final, |
| 211 | .descsize = sizeof(struct sha3_state), |
| 212 | .base = { |
| 213 | .cra_name = "sha3-256", |
| 214 | .cra_driver_name = "sha3-256-generic", |
| 215 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 216 | .cra_blocksize = SHA3_256_BLOCK_SIZE, |
| 217 | .cra_module = THIS_MODULE, |
| 218 | } |
| 219 | }; |
| 220 | |
| 221 | static struct shash_alg sha3_384 = { |
| 222 | .digestsize = SHA3_384_DIGEST_SIZE, |
| 223 | .init = sha3_384_init, |
| 224 | .update = sha3_update, |
| 225 | .final = sha3_final, |
| 226 | .descsize = sizeof(struct sha3_state), |
| 227 | .base = { |
| 228 | .cra_name = "sha3-384", |
| 229 | .cra_driver_name = "sha3-384-generic", |
| 230 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 231 | .cra_blocksize = SHA3_384_BLOCK_SIZE, |
| 232 | .cra_module = THIS_MODULE, |
| 233 | } |
| 234 | }; |
| 235 | |
| 236 | static struct shash_alg sha3_512 = { |
| 237 | .digestsize = SHA3_512_DIGEST_SIZE, |
| 238 | .init = sha3_512_init, |
| 239 | .update = sha3_update, |
| 240 | .final = sha3_final, |
| 241 | .descsize = sizeof(struct sha3_state), |
| 242 | .base = { |
| 243 | .cra_name = "sha3-512", |
| 244 | .cra_driver_name = "sha3-512-generic", |
| 245 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 246 | .cra_blocksize = SHA3_512_BLOCK_SIZE, |
| 247 | .cra_module = THIS_MODULE, |
| 248 | } |
| 249 | }; |
| 250 | |
| 251 | static int __init sha3_generic_mod_init(void) |
| 252 | { |
| 253 | int ret; |
| 254 | |
| 255 | ret = crypto_register_shash(&sha3_224); |
| 256 | if (ret < 0) |
| 257 | goto err_out; |
| 258 | ret = crypto_register_shash(&sha3_256); |
| 259 | if (ret < 0) |
| 260 | goto err_out_224; |
| 261 | ret = crypto_register_shash(&sha3_384); |
| 262 | if (ret < 0) |
| 263 | goto err_out_256; |
| 264 | ret = crypto_register_shash(&sha3_512); |
| 265 | if (ret < 0) |
| 266 | goto err_out_384; |
| 267 | |
| 268 | return 0; |
| 269 | |
| 270 | err_out_384: |
| 271 | crypto_unregister_shash(&sha3_384); |
| 272 | err_out_256: |
| 273 | crypto_unregister_shash(&sha3_256); |
| 274 | err_out_224: |
| 275 | crypto_unregister_shash(&sha3_224); |
| 276 | err_out: |
| 277 | return ret; |
| 278 | } |
| 279 | |
| 280 | static void __exit sha3_generic_mod_fini(void) |
| 281 | { |
| 282 | crypto_unregister_shash(&sha3_224); |
| 283 | crypto_unregister_shash(&sha3_256); |
| 284 | crypto_unregister_shash(&sha3_384); |
| 285 | crypto_unregister_shash(&sha3_512); |
| 286 | } |
| 287 | |
| 288 | module_init(sha3_generic_mod_init); |
| 289 | module_exit(sha3_generic_mod_fini); |
| 290 | |
| 291 | MODULE_LICENSE("GPL"); |
| 292 | MODULE_DESCRIPTION("SHA-3 Secure Hash Algorithm"); |
| 293 | |
| 294 | MODULE_ALIAS_CRYPTO("sha3-224"); |
| 295 | MODULE_ALIAS_CRYPTO("sha3-224-generic"); |
| 296 | MODULE_ALIAS_CRYPTO("sha3-256"); |
| 297 | MODULE_ALIAS_CRYPTO("sha3-256-generic"); |
| 298 | MODULE_ALIAS_CRYPTO("sha3-384"); |
| 299 | MODULE_ALIAS_CRYPTO("sha3-384-generic"); |
| 300 | MODULE_ALIAS_CRYPTO("sha3-512"); |
| 301 | MODULE_ALIAS_CRYPTO("sha3-512-generic"); |