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-rw-r--r--src/vppinfra/crypto/sha2.h715
1 files changed, 715 insertions, 0 deletions
diff --git a/src/vppinfra/crypto/sha2.h b/src/vppinfra/crypto/sha2.h
new file mode 100644
index 00000000000..69a24a2d087
--- /dev/null
+++ b/src/vppinfra/crypto/sha2.h
@@ -0,0 +1,715 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2024 Cisco Systems, Inc.
+ */
+
+#ifndef included_sha2_h
+#define included_sha2_h
+
+#include <vppinfra/clib.h>
+#include <vppinfra/vector.h>
+#include <vppinfra/string.h>
+
+#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 */