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Diffstat (limited to 'src/vppinfra/sha2.h')
| -rw-r--r-- | src/vppinfra/sha2.h | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/src/vppinfra/sha2.h b/src/vppinfra/sha2.h new file mode 100644 index 00000000000..b6caf59ac7f --- /dev/null +++ b/src/vppinfra/sha2.h @@ -0,0 +1,637 @@ +/* + * Copyright (c) 2019 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef included_sha2_h +#define included_sha2_h + +#include <vppinfra/clib.h> + +#define SHA224_DIGEST_SIZE 28 +#define SHA224_BLOCK_SIZE 64 + +#define SHA256_DIGEST_SIZE 32 +#define SHA256_BLOCK_SIZE 64 +#define SHA256_ROTR(x, y) ((x >> y) | (x << (32 - y))) +#define SHA256_CH(a, b, c) ((a & b) ^ (~a & c)) +#define SHA256_MAJ(a, b, c) ((a & b) ^ (a & c) ^ (b & c)) +#define SHA256_CSIGMA0(x) (SHA256_ROTR(x, 2) ^ \ + SHA256_ROTR(x, 13) ^ \ + SHA256_ROTR(x, 22)); +#define SHA256_CSIGMA1(x) (SHA256_ROTR(x, 6) ^ \ + SHA256_ROTR(x, 11) ^ \ + SHA256_ROTR(x, 25)); +#define SHA256_SSIGMA0(x) (SHA256_ROTR (x, 7) ^ \ + SHA256_ROTR (x, 18) ^ \ + (x >> 3)) +#define SHA256_SSIGMA1(x) (SHA256_ROTR (x, 17) ^ \ + SHA256_ROTR (x, 19) ^ \ + (x >> 10)) + +#define SHA256_MSG_SCHED(w, j) \ +{ \ + w[j] = w[j - 7] + w[j - 16]; \ + w[j] += SHA256_SSIGMA0 (w[j - 15]); \ + w[j] += SHA256_SSIGMA1 (w[j - 2]); \ +} + +#define SHA256_TRANSFORM(s, w, i, k) \ +{ \ + __typeof__(s[0]) t1, t2; \ + t1 = k + w[i] + s[7]; \ + t1 += SHA256_CSIGMA1 (s[4]); \ + t1 += SHA256_CH (s[4], s[5], s[6]); \ + t2 = SHA256_CSIGMA0 (s[0]); \ + t2 += SHA256_MAJ (s[0], s[1], s[2]); \ + s[7] = s[6]; \ + s[6] = s[5]; \ + s[5] = s[4]; \ + s[4] = s[3] + t1; \ + s[3] = s[2]; \ + s[2] = s[1]; \ + s[1] = s[0]; \ + s[0] = t1 + t2; \ +} + +#define SHA512_224_DIGEST_SIZE 28 +#define SHA512_224_BLOCK_SIZE 128 + +#define SHA512_256_DIGEST_SIZE 32 +#define SHA512_256_BLOCK_SIZE 128 + +#define SHA384_DIGEST_SIZE 48 +#define SHA384_BLOCK_SIZE 128 + +#define SHA512_DIGEST_SIZE 64 +#define SHA512_BLOCK_SIZE 128 +#define SHA512_ROTR(x, y) ((x >> y) | (x << (64 - y))) +#define SHA512_CH(a, b, c) ((a & b) ^ (~a & c)) +#define SHA512_MAJ(a, b, c) ((a & b) ^ (a & c) ^ (b & c)) +#define SHA512_CSIGMA0(x) (SHA512_ROTR (x, 28) ^ \ + SHA512_ROTR (x, 34) ^ \ + SHA512_ROTR (x, 39)) +#define SHA512_CSIGMA1(x) (SHA512_ROTR (x, 14) ^ \ + SHA512_ROTR (x, 18) ^ \ + SHA512_ROTR (x, 41)) +#define SHA512_SSIGMA0(x) (SHA512_ROTR (x, 1) ^ \ + SHA512_ROTR (x, 8) ^ \ + (x >> 7)) +#define SHA512_SSIGMA1(x) (SHA512_ROTR (x, 19) ^ \ + SHA512_ROTR (x, 61) ^ \ + (x >> 6)) + +#define SHA512_MSG_SCHED(w, j) \ +{ \ + w[j] = w[j - 7] + w[j - 16]; \ + w[j] += SHA512_SSIGMA0 (w[j - 15]); \ + w[j] += SHA512_SSIGMA1 (w[j - 2]); \ +} + +#define SHA512_TRANSFORM(s, w, i, k) \ +{ \ + __typeof__(s[0]) t1, t2; \ + t1 = k + w[i] + s[7]; \ + t1 += SHA512_CSIGMA1 (s[4]); \ + t1 += SHA512_CH (s[4], s[5], s[6]); \ + t2 = SHA512_CSIGMA0 (s[0]); \ + t2 += SHA512_MAJ (s[0], s[1], s[2]); \ + s[7] = s[6]; \ + s[6] = s[5]; \ + s[5] = s[4]; \ + s[4] = s[3] + t1; \ + s[3] = s[2]; \ + s[2] = s[1]; \ + s[1] = s[0]; \ + s[0] = t1 + t2; \ +} + +static const u32 sha224_h[8] = { + 0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939, + 0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4 +}; + +static const u32 sha256_h[8] = { + 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, + 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 +}; + +static const u32 sha256_k[64] = { + 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, + 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, + 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, + 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, + 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, + 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, + 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, + 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, + 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 +}; + +static const u64 sha384_h[8] = { + 0xcbbb9d5dc1059ed8, 0x629a292a367cd507, + 0x9159015a3070dd17, 0x152fecd8f70e5939, + 0x67332667ffc00b31, 0x8eb44a8768581511, + 0xdb0c2e0d64f98fa7, 0x47b5481dbefa4fa4 +}; + +static const u64 sha512_h[8] = { + 0x6a09e667f3bcc908, 0xbb67ae8584caa73b, + 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1, + 0x510e527fade682d1, 0x9b05688c2b3e6c1f, + 0x1f83d9abfb41bd6b, 0x5be0cd19137e2179 +}; + +static const u64 sha512_224_h[8] = { + 0x8c3d37c819544da2, 0x73e1996689dcd4d6, + 0x1dfab7ae32ff9c82, 0x679dd514582f9fcf, + 0x0f6d2b697bd44da8, 0x77e36f7304c48942, + 0x3f9d85a86a1d36c8, 0x1112e6ad91d692a1 +}; + +static const u64 sha512_256_h[8] = { + 0x22312194fc2bf72c, 0x9f555fa3c84c64c2, + 0x2393b86b6f53b151, 0x963877195940eabd, + 0x96283ee2a88effe3, 0xbe5e1e2553863992, + 0x2b0199fc2c85b8aa, 0x0eb72ddc81c52ca2 +}; + +static const u64 sha512_k[80] = { + 0x428a2f98d728ae22, 0x7137449123ef65cd, + 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc, + 0x3956c25bf348b538, 0x59f111f1b605d019, + 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, + 0xd807aa98a3030242, 0x12835b0145706fbe, + 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, + 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, + 0x9bdc06a725c71235, 0xc19bf174cf692694, + 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, + 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, + 0x2de92c6f592b0275, 0x4a7484aa6ea6e483, + 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, + 0x983e5152ee66dfab, 0xa831c66d2db43210, + 0xb00327c898fb213f, 0xbf597fc7beef0ee4, + 0xc6e00bf33da88fc2, 0xd5a79147930aa725, + 0x06ca6351e003826f, 0x142929670a0e6e70, + 0x27b70a8546d22ffc, 0x2e1b21385c26c926, + 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df, + 0x650a73548baf63de, 0x766a0abb3c77b2a8, + 0x81c2c92e47edaee6, 0x92722c851482353b, + 0xa2bfe8a14cf10364, 0xa81a664bbc423001, + 0xc24b8b70d0f89791, 0xc76c51a30654be30, + 0xd192e819d6ef5218, 0xd69906245565a910, + 0xf40e35855771202a, 0x106aa07032bbd1b8, + 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, + 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8, + 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, + 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, + 0x748f82ee5defb2fc, 0x78a5636f43172f60, + 0x84c87814a1f0ab72, 0x8cc702081a6439ec, + 0x90befffa23631e28, 0xa4506cebde82bde9, + 0xbef9a3f7b2c67915, 0xc67178f2e372532b, + 0xca273eceea26619c, 0xd186b8c721c0c207, + 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, + 0x06f067aa72176fba, 0x0a637dc5a2c898a6, + 0x113f9804bef90dae, 0x1b710b35131c471b, + 0x28db77f523047d84, 0x32caab7b40c72493, + 0x3c9ebe0a15c9bebc, 0x431d67c49c100d4c, + 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, + 0x5fcb6fab3ad6faec, 0x6c44198c4a475817 +}; + +typedef enum +{ + CLIB_SHA2_224, + CLIB_SHA2_256, + CLIB_SHA2_384, + CLIB_SHA2_512, + CLIB_SHA2_512_224, + CLIB_SHA2_512_256, +} clib_sha2_type_t; + +#define SHA2_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE +#define SHA2_MAX_DIGEST_SIZE SHA512_DIGEST_SIZE + +typedef struct +{ + u64 total_bytes; + u16 n_pending; + u8 block_size; + u8 digest_size; + union + { + u32 h32[8]; + u64 h64[8]; +#if defined(__SHA__) && defined (__x86_64__) + u32x4 h32x4[2]; +#endif + }; + union + { + u8 as_u8[SHA2_MAX_BLOCK_SIZE]; + u64 as_u64[SHA2_MAX_BLOCK_SIZE / sizeof (u64)]; + uword as_uword[SHA2_MAX_BLOCK_SIZE / sizeof (uword)]; + } + pending; +} +clib_sha2_ctx_t; + +static_always_inline void +clib_sha2_init (clib_sha2_ctx_t * ctx, clib_sha2_type_t type) +{ + const u32 *h32 = 0; + const u64 *h64 = 0; + + ctx->total_bytes = 0; + ctx->n_pending = 0; + + switch (type) + { + case CLIB_SHA2_224: + h32 = sha224_h; + ctx->block_size = SHA224_BLOCK_SIZE; + ctx->digest_size = SHA224_DIGEST_SIZE; + break; + case CLIB_SHA2_256: + h32 = sha256_h; + ctx->block_size = SHA256_BLOCK_SIZE; + ctx->digest_size = SHA256_DIGEST_SIZE; + break; + case CLIB_SHA2_384: + h64 = sha384_h; + ctx->block_size = SHA384_BLOCK_SIZE; + ctx->digest_size = SHA384_DIGEST_SIZE; + break; + case CLIB_SHA2_512: + h64 = sha512_h; + ctx->block_size = SHA512_BLOCK_SIZE; + ctx->digest_size = SHA512_DIGEST_SIZE; + break; + case CLIB_SHA2_512_224: + h64 = sha512_224_h; + ctx->block_size = SHA512_224_BLOCK_SIZE; + ctx->digest_size = SHA512_224_DIGEST_SIZE; + break; + case CLIB_SHA2_512_256: + h64 = sha512_256_h; + ctx->block_size = SHA512_256_BLOCK_SIZE; + ctx->digest_size = SHA512_256_DIGEST_SIZE; + break; + } + if (h32) + for (int i = 0; i < 8; i++) + ctx->h32[i] = h32[i]; + + if (h64) + for (int i = 0; i < 8; i++) + ctx->h64[i] = h64[i]; +} + +#if defined(__SHA__) && defined (__x86_64__) +static inline void +shani_sha256_cycle_w (u32x4 cw[], u8 a, u8 b, u8 c, u8 d) +{ + cw[a] = (u32x4) _mm_sha256msg1_epu32 ((__m128i) cw[a], (__m128i) cw[b]); + cw[a] += (u32x4) _mm_alignr_epi8 ((__m128i) cw[d], (__m128i) cw[c], 4); + cw[a] = (u32x4) _mm_sha256msg2_epu32 ((__m128i) cw[a], (__m128i) cw[d]); +} + +static inline void +shani_sha256_4_rounds (u32x4 cw, u8 n, u32x4 s[]) +{ + u32x4 r = *(u32x4 *) (sha256_k + 4 * n) + cw; + s[0] = (u32x4) _mm_sha256rnds2_epu32 ((__m128i) s[0], (__m128i) s[1], + (__m128i) r); + r = (u32x4) u64x2_interleave_hi ((u64x2) r, (u64x2) r); + s[1] = (u32x4) _mm_sha256rnds2_epu32 ((__m128i) s[1], (__m128i) s[0], + (__m128i) r); +} + +static inline void +shani_sha256_shuffle (u32x4 d[2], u32x4 s[2]) +{ + /* {0, 1, 2, 3}, {4, 5, 6, 7} -> {7, 6, 3, 2}, {5, 4, 1, 0} */ + d[0] = (u32x4) _mm_shuffle_ps ((__m128) s[1], (__m128) s[0], 0xbb); + d[1] = (u32x4) _mm_shuffle_ps ((__m128) s[1], (__m128) s[0], 0x11); +} +#endif + +void +clib_sha256_block (clib_sha2_ctx_t * ctx, const u8 * msg, uword n_blocks) +{ +#if defined(__SHA__) && defined (__x86_64__) + u32x4 h[2], s[2], w[4]; + + shani_sha256_shuffle (h, ctx->h32x4); + + while (n_blocks) + { + w[0] = u32x4_byte_swap (u32x4_load_unaligned ((u8 *) msg + 0)); + w[1] = u32x4_byte_swap (u32x4_load_unaligned ((u8 *) msg + 16)); + w[2] = u32x4_byte_swap (u32x4_load_unaligned ((u8 *) msg + 32)); + w[3] = u32x4_byte_swap (u32x4_load_unaligned ((u8 *) msg + 48)); + + s[0] = h[0]; + s[1] = h[1]; + + shani_sha256_4_rounds (w[0], 0, s); + shani_sha256_4_rounds (w[1], 1, s); + shani_sha256_4_rounds (w[2], 2, s); + shani_sha256_4_rounds (w[3], 3, s); + + shani_sha256_cycle_w (w, 0, 1, 2, 3); + shani_sha256_4_rounds (w[0], 4, s); + shani_sha256_cycle_w (w, 1, 2, 3, 0); + shani_sha256_4_rounds (w[1], 5, s); + shani_sha256_cycle_w (w, 2, 3, 0, 1); + shani_sha256_4_rounds (w[2], 6, s); + shani_sha256_cycle_w (w, 3, 0, 1, 2); + shani_sha256_4_rounds (w[3], 7, s); + + shani_sha256_cycle_w (w, 0, 1, 2, 3); + shani_sha256_4_rounds (w[0], 8, s); + shani_sha256_cycle_w (w, 1, 2, 3, 0); + shani_sha256_4_rounds (w[1], 9, s); + shani_sha256_cycle_w (w, 2, 3, 0, 1); + shani_sha256_4_rounds (w[2], 10, s); + shani_sha256_cycle_w (w, 3, 0, 1, 2); + shani_sha256_4_rounds (w[3], 11, s); + + shani_sha256_cycle_w (w, 0, 1, 2, 3); + shani_sha256_4_rounds (w[0], 12, s); + shani_sha256_cycle_w (w, 1, 2, 3, 0); + shani_sha256_4_rounds (w[1], 13, s); + shani_sha256_cycle_w (w, 2, 3, 0, 1); + shani_sha256_4_rounds (w[2], 14, s); + shani_sha256_cycle_w (w, 3, 0, 1, 2); + shani_sha256_4_rounds (w[3], 15, s); + + h[0] += s[0]; + h[1] += s[1]; + + /* next */ + msg += SHA256_BLOCK_SIZE; + n_blocks--; + } + + shani_sha256_shuffle (ctx->h32x4, h); +#else + u32 w[64], s[8], i; + + while (n_blocks) + { + for (i = 0; i < 8; i++) + s[i] = ctx->h32[i]; + + for (i = 0; i < 16; i++) + { + w[i] = clib_net_to_host_u32 (*((u32 *) msg + i)); + SHA256_TRANSFORM (s, w, i, sha256_k[i]); + } + + for (i = 16; i < 64; i++) + { + SHA256_MSG_SCHED (w, i); + SHA256_TRANSFORM (s, w, i, sha256_k[i]); + } + + for (i = 0; i < 8; i++) + ctx->h32[i] += s[i]; + + /* next */ + msg += SHA256_BLOCK_SIZE; + n_blocks--; + } +#endif +} + +static_always_inline void +clib_sha512_block (clib_sha2_ctx_t * ctx, const u8 * msg, uword n_blocks) +{ + u64 w[80], s[8], i; + + while (n_blocks) + { + for (i = 0; i < 8; i++) + s[i] = ctx->h64[i]; + + for (i = 0; i < 16; i++) + { + w[i] = clib_net_to_host_u64 (*((u64 *) msg + i)); + SHA512_TRANSFORM (s, w, i, sha512_k[i]); + } + + for (i = 16; i < 80; i++) + { + SHA512_MSG_SCHED (w, i); + SHA512_TRANSFORM (s, w, i, sha512_k[i]); + } + + for (i = 0; i < 8; i++) + ctx->h64[i] += s[i]; + + /* next */ + msg += SHA512_BLOCK_SIZE; + n_blocks--; + } +} + +static_always_inline void +clib_sha2_update (clib_sha2_ctx_t * ctx, const u8 * msg, uword n_bytes) +{ + uword n_blocks; + if (ctx->n_pending) + { + uword n_left = ctx->block_size - ctx->n_pending; + if (n_bytes < n_left) + { + clib_memcpy_fast (ctx->pending.as_u8 + ctx->n_pending, msg, + n_bytes); + ctx->n_pending += n_bytes; + return; + } + else + { + clib_memcpy_fast (ctx->pending.as_u8 + ctx->n_pending, msg, n_left); + if (ctx->block_size == SHA512_BLOCK_SIZE) + clib_sha512_block (ctx, ctx->pending.as_u8, 1); + else + clib_sha256_block (ctx, ctx->pending.as_u8, 1); + ctx->n_pending = 0; + ctx->total_bytes += ctx->block_size; + n_bytes -= n_left; + msg += n_left; + } + } + + if ((n_blocks = n_bytes / ctx->block_size)) + { + if (ctx->block_size == SHA512_BLOCK_SIZE) + clib_sha512_block (ctx, msg, n_blocks); + else + clib_sha256_block (ctx, msg, n_blocks); + n_bytes -= n_blocks * ctx->block_size; + msg += n_blocks * ctx->block_size; + ctx->total_bytes += n_blocks * ctx->block_size; + } + + if (n_bytes) + { + clib_memset_u8 (ctx->pending.as_u8, 0, ctx->block_size); + clib_memcpy_fast (ctx->pending.as_u8, msg, n_bytes); + ctx->n_pending = n_bytes; + } + else + ctx->n_pending = 0; +} + +static_always_inline void +clib_sha2_final (clib_sha2_ctx_t * ctx, u8 * digest) +{ + int i; + + ctx->total_bytes += ctx->n_pending; + if (ctx->n_pending == 0) + { + clib_memset (ctx->pending.as_u8, 0, ctx->block_size); + ctx->pending.as_u8[0] = 0x80; + } + else if (ctx->n_pending + sizeof (u64) + sizeof (u8) > ctx->block_size) + { + ctx->pending.as_u8[ctx->n_pending] = 0x80; + if (ctx->block_size == SHA512_BLOCK_SIZE) + clib_sha512_block (ctx, ctx->pending.as_u8, 1); + else + clib_sha256_block (ctx, ctx->pending.as_u8, 1); + clib_memset (ctx->pending.as_u8, 0, ctx->block_size); + } + else + ctx->pending.as_u8[ctx->n_pending] = 0x80; + + ctx->pending.as_u64[ctx->block_size / 8 - 1] = + clib_net_to_host_u64 (ctx->total_bytes * 8); + if (ctx->block_size == SHA512_BLOCK_SIZE) + clib_sha512_block (ctx, ctx->pending.as_u8, 1); + else + clib_sha256_block (ctx, ctx->pending.as_u8, 1); + + if (ctx->block_size == SHA512_BLOCK_SIZE) + { + for (i = 0; i < ctx->digest_size / sizeof (u64); i++) + *((u64 *) digest + i) = clib_net_to_host_u64 (ctx->h64[i]); + + /* sha512-224 case - write half of u64 */ + if (i * sizeof (u64) < ctx->digest_size) + *((u32 *) digest + 2 * i) = clib_net_to_host_u32 (ctx->h64[i] >> 32); + } + else + for (i = 0; i < ctx->digest_size / sizeof (u32); i++) + *((u32 *) digest + i) = clib_net_to_host_u32 (ctx->h32[i]); +} + +static_always_inline void +clib_sha2 (clib_sha2_type_t type, const u8 * msg, uword len, u8 * digest) +{ + clib_sha2_ctx_t ctx; + clib_sha2_init (&ctx, type); + clib_sha2_update (&ctx, msg, len); + clib_sha2_final (&ctx, digest); +} + +#define clib_sha224(...) clib_sha2 (CLIB_SHA2_224, __VA_ARGS__) +#define clib_sha256(...) clib_sha2 (CLIB_SHA2_256, __VA_ARGS__) +#define clib_sha384(...) clib_sha2 (CLIB_SHA2_384, __VA_ARGS__) +#define clib_sha512(...) clib_sha2 (CLIB_SHA2_512, __VA_ARGS__) +#define clib_sha512_224(...) clib_sha2 (CLIB_SHA2_512_224, __VA_ARGS__) +#define clib_sha512_256(...) clib_sha2 (CLIB_SHA2_512_256, __VA_ARGS__) + +static_always_inline void +clib_hmac_sha2 (clib_sha2_type_t type, const u8 * key, uword key_len, + const u8 * msg, uword len, u8 * digest) +{ + clib_sha2_ctx_t _ctx, *ctx = &_ctx; + uword key_data[SHA2_MAX_BLOCK_SIZE / sizeof (uword)]; + u8 i_digest[SHA2_MAX_DIGEST_SIZE]; + int i, n_words; + + clib_sha2_init (ctx, type); + n_words = ctx->block_size / sizeof (uword); + + /* key */ + if (key_len > ctx->block_size) + { + /* key is longer than block, calculate hash of key */ + clib_sha2_update (ctx, key, key_len); + for (i = (ctx->digest_size / sizeof (uword)) / 2; i < n_words; i++) + key_data[i] = 0; + clib_sha2_final (ctx, (u8 *) key_data); + clib_sha2_init (ctx, type); + } + else + { + for (i = 0; i < n_words; i++) + key_data[i] = 0; + clib_memcpy_fast (key_data, key, key_len); + } + + /* ipad */ + for (i = 0; i < n_words; i++) + ctx->pending.as_uword[i] = key_data[i] ^ (uword) 0x3636363636363636; + if (ctx->block_size == SHA512_BLOCK_SIZE) + clib_sha512_block (ctx, ctx->pending.as_u8, 1); + else + clib_sha256_block (ctx, ctx->pending.as_u8, 1); + ctx->total_bytes += ctx->block_size; + + /* message */ + clib_sha2_update (ctx, msg, len); + clib_sha2_final (ctx, i_digest); + + /* opad */ + clib_sha2_init (ctx, type); + for (i = 0; i < n_words; i++) + ctx->pending.as_uword[i] = key_data[i] ^ (uword) 0x5c5c5c5c5c5c5c5c; + if (ctx->block_size == SHA512_BLOCK_SIZE) + clib_sha512_block (ctx, ctx->pending.as_u8, 1); + else + clib_sha256_block (ctx, ctx->pending.as_u8, 1); + ctx->total_bytes += ctx->block_size; + + /* digest */ + clib_sha2_update (ctx, i_digest, ctx->digest_size); + clib_sha2_final (ctx, digest); +} + +#define clib_hmac_sha224(...) clib_hmac_sha2 (CLIB_SHA2_224, __VA_ARGS__) +#define clib_hmac_sha256(...) clib_hmac_sha2 (CLIB_SHA2_256, __VA_ARGS__) +#define clib_hmac_sha384(...) clib_hmac_sha2 (CLIB_SHA2_384, __VA_ARGS__) +#define clib_hmac_sha512(...) clib_hmac_sha2 (CLIB_SHA2_512, __VA_ARGS__) +#define clib_hmac_sha512_224(...) clib_hmac_sha2 (CLIB_SHA2_512_224, __VA_ARGS__) +#define clib_hmac_sha512_256(...) clib_hmac_sha2 (CLIB_SHA2_512_256, __VA_ARGS__) + +#endif /* included_sha2_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |