/* SPDX-License-Identifier: Apache-2.0 * Copyright(c) 2024 Cisco Systems, Inc. */ #ifndef included_sha2_h #define included_sha2_h #include #include #include #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_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; \ } #if defined(__SHA__) && defined(__x86_64__) #define CLIB_SHA256_ISA_INTEL #define CLIB_SHA256_ISA #endif #ifdef __ARM_FEATURE_SHA2 #define CLIB_SHA256_ISA_ARM #define CLIB_SHA256_ISA #endif 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 clib_sha2_256_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 clib_sha2_512_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 CLIB_SHA2_256_BLOCK_SIZE 64 #define CLIB_SHA2_512_BLOCK_SIZE 128 #define SHA2_MAX_BLOCK_SIZE CLIB_SHA2_512_BLOCK_SIZE #define SHA2_MAX_DIGEST_SIZE 64 static const struct { u8 block_size; u8 digest_size; const u32 *h32; const u64 *h64; } clib_sha2_variants[] = { [CLIB_SHA2_224] = { .block_size = CLIB_SHA2_256_BLOCK_SIZE, .digest_size = 28, .h32 = sha224_h, }, [CLIB_SHA2_256] = { .block_size = CLIB_SHA2_256_BLOCK_SIZE, .digest_size = 32, .h32 = sha256_h, }, [CLIB_SHA2_384] = { .block_size = CLIB_SHA2_512_BLOCK_SIZE, .digest_size = 48, .h64 = sha384_h, }, [CLIB_SHA2_512] = { .block_size = CLIB_SHA2_512_BLOCK_SIZE, .digest_size = 64, .h64 = sha512_h, }, [CLIB_SHA2_512_224] = { .block_size = CLIB_SHA2_512_BLOCK_SIZE, .digest_size = 28, .h64 = sha512_224_h, }, [CLIB_SHA2_512_256] = { .block_size = CLIB_SHA2_512_BLOCK_SIZE, .digest_size = 32, .h64 = sha512_256_h, }, }; typedef union { u32 h32[8]; u64 h64[8]; #ifdef CLIB_SHA256_ISA u32x4 h32x4[2]; #endif } clib_sha2_h_t; typedef struct { u64 total_bytes; u16 n_pending; clib_sha2_h_t h; 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_state_t; typedef struct { clib_sha2_type_t type; u8 block_size; u8 digest_size; clib_sha2_state_t state; } clib_sha2_ctx_t; static_always_inline void clib_sha2_state_init (clib_sha2_state_t *state, clib_sha2_type_t type) { clib_sha2_state_t st = {}; if (clib_sha2_variants[type].block_size == CLIB_SHA2_256_BLOCK_SIZE) for (int i = 0; i < 8; i++) st.h.h32[i] = clib_sha2_variants[type].h32[i]; else for (int i = 0; i < 8; i++) st.h.h64[i] = clib_sha2_variants[type].h64[i]; *state = st; } static_always_inline void clib_sha2_init (clib_sha2_ctx_t *ctx, clib_sha2_type_t type) { clib_sha2_state_init (&ctx->state, type); ctx->block_size = clib_sha2_variants[type].block_size; ctx->digest_size = clib_sha2_variants[type].digest_size; ctx->type = type; } #ifdef CLIB_SHA256_ISA static inline void clib_sha256_vec_cycle_w (u32x4 w[], u8 i) { u8 j = (i + 1) % 4; u8 k = (i + 2) % 4; u8 l = (i + 3) % 4; #ifdef CLIB_SHA256_ISA_INTEL w[i] = (u32x4) _mm_sha256msg1_epu32 ((__m128i) w[i], (__m128i) w[j]); w[i] += (u32x4) _mm_alignr_epi8 ((__m128i) w[l], (__m128i) w[k], 4); w[i] = (u32x4) _mm_sha256msg2_epu32 ((__m128i) w[i], (__m128i) w[l]); #elif defined(CLIB_SHA256_ISA_ARM) w[i] = vsha256su1q_u32 (vsha256su0q_u32 (w[i], w[j]), w[k], w[l]); #endif } static inline void clib_sha256_vec_4_rounds (u32x4 w, u8 n, u32x4 s[]) { #ifdef CLIB_SHA256_ISA_INTEL u32x4 r = *(u32x4 *) (clib_sha2_256_k + 4 * n) + w; 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); #elif defined(CLIB_SHA256_ISA_ARM) u32x4 r0, s0; const u32x4u *k = (u32x4u *) clib_sha2_256_k; r0 = w + k[n]; s0 = s[0]; s[0] = vsha256hq_u32 (s[0], s[1], r0); s[1] = vsha256h2q_u32 (s[1], s0, r0); #endif } #endif #if defined(CLIB_SHA256_ISA) static inline u32x4 clib_sha256_vec_load (u32x4 r) { #if defined(CLIB_SHA256_ISA_INTEL) return u32x4_byte_swap (r); #elif defined(CLIB_SHA256_ISA_ARM) return vreinterpretq_u32_u8 (vrev32q_u8 (vreinterpretq_u8_u32 (r))); #endif } static inline void clib_sha256_vec_shuffle (u32x4 d[2]) { #if defined(CLIB_SHA256_ISA_INTEL) /* {0, 1, 2, 3}, {4, 5, 6, 7} -> {7, 6, 3, 2}, {5, 4, 1, 0} */ u32x4 r; r = (u32x4) _mm_shuffle_ps ((__m128) d[1], (__m128) d[0], 0xbb); d[1] = (u32x4) _mm_shuffle_ps ((__m128) d[1], (__m128) d[0], 0x11); d[0] = r; #endif } #endif static inline void clib_sha256_block (clib_sha2_state_t *st, const u8 *msg, uword n_blocks) { #if defined(CLIB_SHA256_ISA) u32x4 h[2]; u32x4u *m = (u32x4u *) msg; h[0] = st->h.h32x4[0]; h[1] = st->h.h32x4[1]; clib_sha256_vec_shuffle (h); for (; n_blocks; m += 4, n_blocks--) { u32x4 s[2], w[4]; s[0] = h[0]; s[1] = h[1]; w[0] = clib_sha256_vec_load (m[0]); w[1] = clib_sha256_vec_load (m[1]); w[2] = clib_sha256_vec_load (m[2]); w[3] = clib_sha256_vec_load (m[3]); clib_sha256_vec_4_rounds (w[0], 0, s); clib_sha256_vec_4_rounds (w[1], 1, s); clib_sha256_vec_4_rounds (w[2], 2, s); clib_sha256_vec_4_rounds (w[3], 3, s); clib_sha256_vec_cycle_w (w, 0); clib_sha256_vec_4_rounds (w[0], 4, s); clib_sha256_vec_cycle_w (w, 1); clib_sha256_vec_4_rounds (w[1], 5, s); clib_sha256_vec_cycle_w (w, 2); clib_sha256_vec_4_rounds (w[2], 6, s); clib_sha256_vec_cycle_w (w, 3); clib_sha256_vec_4_rounds (w[3], 7, s); clib_sha256_vec_cycle_w (w, 0); clib_sha256_vec_4_rounds (w[0], 8, s); clib_sha256_vec_cycle_w (w, 1); clib_sha256_vec_4_rounds (w[1], 9, s); clib_sha256_vec_cycle_w (w, 2); clib_sha256_vec_4_rounds (w[2], 10, s); clib_sha256_vec_cycle_w (w, 3); clib_sha256_vec_4_rounds (w[3], 11, s); clib_sha256_vec_cycle_w (w, 0); clib_sha256_vec_4_rounds (w[0], 12, s); clib_sha256_vec_cycle_w (w, 1); clib_sha256_vec_4_rounds (w[1], 13, s); clib_sha256_vec_cycle_w (w, 2); clib_sha256_vec_4_rounds (w[2], 14, s); clib_sha256_vec_cycle_w (w, 3); clib_sha256_vec_4_rounds (w[3], 15, s); h[0] += s[0]; h[1] += s[1]; } clib_sha256_vec_shuffle (h); st->h.h32x4[0] = h[0]; st->h.h32x4[1] = h[1]; #else u32 w[64], s[8], i; clib_sha2_h_t h; h = st->h; for (; n_blocks; msg += CLIB_SHA2_256_BLOCK_SIZE, n_blocks--) { for (i = 0; i < 8; i++) s[i] = h.h32[i]; for (i = 0; i < 16; i++) { w[i] = clib_net_to_host_u32 ((((u32u *) msg)[i])); SHA256_TRANSFORM (s, w, i, clib_sha2_256_k[i]); } for (i = 16; i < 64; i++) { SHA256_MSG_SCHED (w, i); SHA256_TRANSFORM (s, w, i, clib_sha2_256_k[i]); } for (i = 0; i < 8; i++) h.h32[i] += s[i]; } st->h = h; #endif } static_always_inline void clib_sha512_block (clib_sha2_state_t *st, const u8 *msg, uword n_blocks) { u64 w[80], s[8], i; clib_sha2_h_t h; h = st->h; for (; n_blocks; msg += CLIB_SHA2_512_BLOCK_SIZE, n_blocks--) { for (i = 0; i < 8; i++) s[i] = h.h64[i]; for (i = 0; i < 16; i++) { w[i] = clib_net_to_host_u64 ((((u64u *) msg)[i])); SHA512_TRANSFORM (s, w, i, clib_sha2_512_k[i]); } for (i = 16; i < 80; i++) { SHA512_MSG_SCHED (w, i); SHA512_TRANSFORM (s, w, i, clib_sha2_512_k[i]); } for (i = 0; i < 8; i++) h.h64[i] += s[i]; } st->h = h; } static_always_inline void clib_sha2_update_internal (clib_sha2_state_t *st, u8 block_size, const u8 *msg, uword n_bytes) { uword n_blocks; if (st->n_pending) { uword n_left = block_size - st->n_pending; if (n_bytes < n_left) { clib_memcpy_fast (st->pending.as_u8 + st->n_pending, msg, n_bytes); st->n_pending += n_bytes; return; } else { clib_memcpy_fast (st->pending.as_u8 + st->n_pending, msg, n_left); if (block_size == CLIB_SHA2_512_BLOCK_SIZE) clib_sha512_block (st, st->pending.as_u8, 1); else clib_sha256_block (st, st->pending.as_u8, 1); st->n_pending = 0; st->total_bytes += block_size; n_bytes -= n_left; msg += n_left; } } if ((n_blocks = n_bytes / block_size)) { if (block_size == CLIB_SHA2_512_BLOCK_SIZE) clib_sha512_block (st, msg, n_blocks); else clib_sha256_block (st, msg, n_blocks); n_bytes -= n_blocks * block_size; msg += n_blocks * block_size; st->total_bytes += n_blocks * block_size; } if (n_bytes) { clib_memset_u8 (st->pending.as_u8, 0, block_size); clib_memcpy_fast (st->pending.as_u8, msg, n_bytes); st->n_pending = n_bytes; } else st->n_pending = 0; } static_always_inline void clib_sha2_update (clib_sha2_ctx_t *ctx, const u8 *msg, uword n_bytes) { clib_sha2_update_internal (&ctx->state, ctx->block_size, msg, n_bytes); } static_always_inline void clib_sha2_final_internal (clib_sha2_state_t *st, u8 block_size, u8 digest_size, u8 *digest) { int i; st->total_bytes += st->n_pending; if (st->n_pending == 0) { clib_memset (st->pending.as_u8, 0, block_size); st->pending.as_u8[0] = 0x80; } else if (st->n_pending + sizeof (u64) + sizeof (u8) > block_size) { st->pending.as_u8[st->n_pending] = 0x80; if (block_size == CLIB_SHA2_512_BLOCK_SIZE) clib_sha512_block (st, st->pending.as_u8, 1); else clib_sha256_block (st, st->pending.as_u8, 1); clib_memset (st->pending.as_u8, 0, block_size); } else st->pending.as_u8[st->n_pending] = 0x80; st->pending.as_u64[block_size / 8 - 1] = clib_net_to_host_u64 (st->total_bytes * 8); if (block_size == CLIB_SHA2_512_BLOCK_SIZE) { clib_sha512_block (st, st->pending.as_u8, 1); for (i = 0; i < digest_size / sizeof (u64); i++) ((u64 *) digest)[i] = clib_net_to_host_u64 (st->h.h64[i]); /* sha512-224 case - write half of u64 */ if (i * sizeof (u64) < digest_size) ((u32 *) digest)[2 * i] = clib_net_to_host_u32 (st->h.h64[i] >> 32); } else { clib_sha256_block (st, st->pending.as_u8, 1); for (i = 0; i < digest_size / sizeof (u32); i++) *((u32 *) digest + i) = clib_net_to_host_u32 (st->h.h32[i]); } } static_always_inline void clib_sha2_final (clib_sha2_ctx_t *ctx, u8 *digest) { clib_sha2_final_internal (&ctx->state, ctx->block_size, ctx->digest_size, digest); } 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__) /* * HMAC */ typedef struct { clib_sha2_h_t ipad_h; clib_sha2_h_t opad_h; } clib_sha2_hmac_key_data_t; typedef struct { clib_sha2_type_t type; u8 block_size; u8 digest_size; clib_sha2_state_t ipad_state; clib_sha2_state_t opad_state; } clib_sha2_hmac_ctx_t; static_always_inline void clib_sha2_hmac_key_data (clib_sha2_type_t type, const u8 *key, uword key_len, clib_sha2_hmac_key_data_t *kd) { u8 block_size = clib_sha2_variants[type].block_size; u8 data[SHA2_MAX_BLOCK_SIZE] = {}; u8 ikey[SHA2_MAX_BLOCK_SIZE]; u8 okey[SHA2_MAX_BLOCK_SIZE]; clib_sha2_state_t ipad_state; clib_sha2_state_t opad_state; /* key */ if (key_len > block_size) { /* key is longer than block, calculate hash of key */ clib_sha2_ctx_t ctx; clib_sha2_init (&ctx, type); clib_sha2_update (&ctx, key, key_len); clib_sha2_final (&ctx, (u8 *) data); } else clib_memcpy_fast (data, key, key_len); for (int i = 0, w = 0; w < block_size; w += sizeof (uword), i++) { ((uwordu *) ikey)[i] = ((uwordu *) data)[i] ^ 0x3636363636363636UL; ((uwordu *) okey)[i] = ((uwordu *) data)[i] ^ 0x5c5c5c5c5c5c5c5cUL; } clib_sha2_state_init (&ipad_state, type); clib_sha2_state_init (&opad_state, type); if (block_size == CLIB_SHA2_512_BLOCK_SIZE) { clib_sha512_block (&ipad_state, ikey, 1); clib_sha512_block (&opad_state, okey, 1); } else { clib_sha256_block (&ipad_state, ikey, 1); clib_sha256_block (&opad_state, okey, 1); } kd->ipad_h = ipad_state.h; kd->opad_h = opad_state.h; } static_always_inline void clib_sha2_hmac_init (clib_sha2_hmac_ctx_t *ctx, clib_sha2_type_t type, clib_sha2_hmac_key_data_t *kd) { u8 block_size = clib_sha2_variants[type].block_size; u8 digest_size = clib_sha2_variants[type].digest_size; *ctx = (clib_sha2_hmac_ctx_t) { .type = type, .block_size = block_size, .digest_size = digest_size, .ipad_state = { .h = kd->ipad_h, .total_bytes = block_size, }, .opad_state = { .h = kd->opad_h, .total_bytes = block_size, }, }; } static_always_inline void clib_sha2_hmac_update (clib_sha2_hmac_ctx_t *ctx, const u8 *msg, uword len) { clib_sha2_update_internal (&ctx->ipad_state, ctx->block_size, msg, len); } static_always_inline void clib_sha2_hmac_final (clib_sha2_hmac_ctx_t *ctx, u8 *digest) { u8 i_digest[SHA2_MAX_DIGEST_SIZE]; clib_sha2_final_internal (&ctx->ipad_state, ctx->block_size, ctx->digest_size, i_digest); clib_sha2_update_internal (&ctx->opad_state, ctx->block_size, i_digest, ctx->digest_size); clib_sha2_final_internal (&ctx->opad_state, ctx->block_size, ctx->digest_size, digest); } static_always_inline void clib_sha2_hmac (clib_sha2_type_t type, const u8 *key, uword key_len, const u8 *msg, uword len, u8 *digest) { clib_sha2_hmac_ctx_t _ctx, *ctx = &_ctx; clib_sha2_hmac_key_data_t kd; clib_sha2_hmac_key_data (type, key, key_len, &kd); clib_sha2_hmac_init (ctx, type, &kd); clib_sha2_hmac_update (ctx, msg, len); clib_sha2_hmac_final (ctx, digest); } #define clib_hmac_sha224(...) clib_sha2_hmac (CLIB_SHA2_224, __VA_ARGS__) #define clib_hmac_sha256(...) clib_sha2_hmac (CLIB_SHA2_256, __VA_ARGS__) #define clib_hmac_sha384(...) clib_sha2_hmac (CLIB_SHA2_384, __VA_ARGS__) #define clib_hmac_sha512(...) clib_sha2_hmac (CLIB_SHA2_512, __VA_ARGS__) #define clib_hmac_sha512_224(...) \ clib_sha2_hmac (CLIB_SHA2_512_224, __VA_ARGS__) #define clib_hmac_sha512_256(...) \ clib_sha2_hmac (CLIB_SHA2_512_256, __VA_ARGS__) #endif /* included_sha2_h */