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vpp/src/vppinfra/sha2.h
Damjan Marion cf18ca92b8 vppinfra: add SHA-2 family of hash algorithms (including HMAC) 
Change-Id: I54d6fb1a2721b548620eb66cea254d0103deca32
Signed-off-by: Damjan Marion <damarion@cisco.com>
2019-04-15 18:18:47 +00:00

638 lines
18 KiB
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/*
* 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:
*/
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