Indentation
This commit is contained in:
Frank Denis
parent
9b151f4efe
commit
23e5b13b00
@ -37,373 +37,314 @@
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#include <stdlib.h>
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#include <string.h>
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typedef struct SHA256Context {
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uint32_t state[8];
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uint32_t count[2];
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unsigned char buf[64];
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} SHA256_CTX;
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typedef struct crypto_hash_sha256_state {
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uint32_t state[8];
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uint32_t count[2];
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unsigned char buf[64];
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} crypto_hash_sha256_state;
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typedef struct HMAC_SHA256Context {
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SHA256_CTX ictx;
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SHA256_CTX octx;
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} HMAC_SHA256_CTX;
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typedef struct crypto_hmac_sha256_state {
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crypto_hash_sha256_state ictx;
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crypto_hash_sha256_state octx;
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} crypto_hmac_sha256_state;
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static void _SHA256_Init(SHA256_CTX *);
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static void _SHA256_Update(SHA256_CTX *, const void *, size_t);
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static void _SHA256_Final(unsigned char [32], SHA256_CTX *);
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static void HMAC__SHA256_Init(HMAC_SHA256_CTX *, const void *, size_t);
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static void HMAC__SHA256_Update(HMAC_SHA256_CTX *, const void *, size_t);
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static void HMAC__SHA256_Final(unsigned char [32], HMAC_SHA256_CTX *);
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static void _SHA256_Init(crypto_hash_sha256_state *);
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static void _SHA256_Update(crypto_hash_sha256_state *, const void *, size_t);
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static void _SHA256_Final(unsigned char [32], crypto_hash_sha256_state *);
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static void HMAC__SHA256_Init(crypto_hmac_sha256_state *, const void *, size_t);
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static void HMAC__SHA256_Update(crypto_hmac_sha256_state *, const void *, size_t);
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static void HMAC__SHA256_Final(unsigned char [32], crypto_hmac_sha256_state *);
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/* Avoid namespace collisions with BSD <sys/endian.h>. */
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#define be32dec scrypt_be32dec
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#define be32enc scrypt_be32enc
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#define be32dec _sha256_be32dec
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#define be32enc _sha256_be32enc
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static inline uint32_t
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be32dec(const void *pp)
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{
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const uint8_t *p = (uint8_t const *)pp;
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const uint8_t *p = (uint8_t const *)pp;
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return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) +
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((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24));
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return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) +
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((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24));
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}
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static inline void
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be32enc(void *pp, uint32_t x)
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{
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uint8_t * p = (uint8_t *)pp;
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uint8_t * p = (uint8_t *)pp;
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p[3] = x & 0xff;
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p[2] = (x >> 8) & 0xff;
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p[1] = (x >> 16) & 0xff;
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p[0] = (x >> 24) & 0xff;
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p[3] = x & 0xff;
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p[2] = (x >> 8) & 0xff;
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p[1] = (x >> 16) & 0xff;
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p[0] = (x >> 24) & 0xff;
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}
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/*
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* Encode a length len/4 vector of (uint32_t) into a length len vector of
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* (unsigned char) in big-endian form. Assumes len is a multiple of 4.
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*/
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static void
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be32enc_vect(unsigned char *dst, const uint32_t *src, size_t len)
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{
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size_t i;
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size_t i;
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for (i = 0; i < len / 4; i++)
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be32enc(dst + i * 4, src[i]);
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for (i = 0; i < len / 4; i++) {
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be32enc(dst + i * 4, src[i]);
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}
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}
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/*
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* Decode a big-endian length len vector of (unsigned char) into a length
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* len/4 vector of (uint32_t). Assumes len is a multiple of 4.
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*/
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static void
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be32dec_vect(uint32_t *dst, const unsigned char *src, size_t len)
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{
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size_t i;
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size_t i;
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for (i = 0; i < len / 4; i++)
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dst[i] = be32dec(src + i * 4);
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for (i = 0; i < len / 4; i++) {
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dst[i] = be32dec(src + i * 4);
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}
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}
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/* Elementary functions used by SHA256 */
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#define Ch(x, y, z) ((x & (y ^ z)) ^ z)
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#define Maj(x, y, z) ((x & (y | z)) | (y & z))
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#define SHR(x, n) (x >> n)
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#define ROTR(x, n) ((x >> n) | (x << (32 - n)))
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#define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
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#define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
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#define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
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#define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
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#define Ch(x, y, z) ((x & (y ^ z)) ^ z)
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#define Maj(x, y, z) ((x & (y | z)) | (y & z))
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#define SHR(x, n) (x >> n)
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#define ROTR(x, n) ((x >> n) | (x << (32 - n)))
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#define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
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#define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
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#define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
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#define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
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/* SHA256 round function */
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#define RND(a, b, c, d, e, f, g, h, k) \
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t0 = h + S1(e) + Ch(e, f, g) + k; \
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t1 = S0(a) + Maj(a, b, c); \
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d += t0; \
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h = t0 + t1;
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#define RND(a, b, c, d, e, f, g, h, k) \
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t0 = h + S1(e) + Ch(e, f, g) + k; \
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t1 = S0(a) + Maj(a, b, c); \
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d += t0; \
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h = t0 + t1;
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/* Adjusted round function for rotating state */
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#define RNDr(S, W, i, k) \
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RND(S[(64 - i) % 8], S[(65 - i) % 8], \
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S[(66 - i) % 8], S[(67 - i) % 8], \
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S[(68 - i) % 8], S[(69 - i) % 8], \
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S[(70 - i) % 8], S[(71 - i) % 8], \
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W[i] + k)
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#define RNDr(S, W, i, k) \
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RND(S[(64 - i) % 8], S[(65 - i) % 8], \
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S[(66 - i) % 8], S[(67 - i) % 8], \
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S[(68 - i) % 8], S[(69 - i) % 8], \
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S[(70 - i) % 8], S[(71 - i) % 8], \
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W[i] + k)
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/*
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* SHA256 block compression function. The 256-bit state is transformed via
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* the 512-bit input block to produce a new state.
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*/
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static void
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SHA256_Transform(uint32_t * state, const unsigned char block[64])
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{
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uint32_t W[64];
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uint32_t S[8];
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uint32_t t0, t1;
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int i;
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uint32_t W[64];
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uint32_t S[8];
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uint32_t t0, t1;
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int i;
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/* 1. Prepare message schedule W. */
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be32dec_vect(W, block, 64);
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for (i = 16; i < 64; i++)
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W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16];
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be32dec_vect(W, block, 64);
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for (i = 16; i < 64; i++) {
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W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16];
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}
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/* 2. Initialize working variables. */
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memcpy(S, state, 32);
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memcpy(S, state, 32);
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/* 3. Mix. */
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RNDr(S, W, 0, 0x428a2f98);
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RNDr(S, W, 1, 0x71374491);
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RNDr(S, W, 2, 0xb5c0fbcf);
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RNDr(S, W, 3, 0xe9b5dba5);
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RNDr(S, W, 4, 0x3956c25b);
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RNDr(S, W, 5, 0x59f111f1);
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RNDr(S, W, 6, 0x923f82a4);
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RNDr(S, W, 7, 0xab1c5ed5);
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RNDr(S, W, 8, 0xd807aa98);
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RNDr(S, W, 9, 0x12835b01);
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RNDr(S, W, 10, 0x243185be);
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RNDr(S, W, 11, 0x550c7dc3);
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RNDr(S, W, 12, 0x72be5d74);
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RNDr(S, W, 13, 0x80deb1fe);
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RNDr(S, W, 14, 0x9bdc06a7);
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RNDr(S, W, 15, 0xc19bf174);
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RNDr(S, W, 16, 0xe49b69c1);
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RNDr(S, W, 17, 0xefbe4786);
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RNDr(S, W, 18, 0x0fc19dc6);
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RNDr(S, W, 19, 0x240ca1cc);
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RNDr(S, W, 20, 0x2de92c6f);
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RNDr(S, W, 21, 0x4a7484aa);
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RNDr(S, W, 22, 0x5cb0a9dc);
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RNDr(S, W, 23, 0x76f988da);
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RNDr(S, W, 24, 0x983e5152);
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RNDr(S, W, 25, 0xa831c66d);
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RNDr(S, W, 26, 0xb00327c8);
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RNDr(S, W, 27, 0xbf597fc7);
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RNDr(S, W, 28, 0xc6e00bf3);
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RNDr(S, W, 29, 0xd5a79147);
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RNDr(S, W, 30, 0x06ca6351);
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RNDr(S, W, 31, 0x14292967);
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RNDr(S, W, 32, 0x27b70a85);
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RNDr(S, W, 33, 0x2e1b2138);
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RNDr(S, W, 34, 0x4d2c6dfc);
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RNDr(S, W, 35, 0x53380d13);
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RNDr(S, W, 36, 0x650a7354);
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RNDr(S, W, 37, 0x766a0abb);
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RNDr(S, W, 38, 0x81c2c92e);
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RNDr(S, W, 39, 0x92722c85);
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RNDr(S, W, 40, 0xa2bfe8a1);
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RNDr(S, W, 41, 0xa81a664b);
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RNDr(S, W, 42, 0xc24b8b70);
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RNDr(S, W, 43, 0xc76c51a3);
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RNDr(S, W, 44, 0xd192e819);
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RNDr(S, W, 45, 0xd6990624);
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RNDr(S, W, 46, 0xf40e3585);
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RNDr(S, W, 47, 0x106aa070);
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RNDr(S, W, 48, 0x19a4c116);
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RNDr(S, W, 49, 0x1e376c08);
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RNDr(S, W, 50, 0x2748774c);
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RNDr(S, W, 51, 0x34b0bcb5);
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RNDr(S, W, 52, 0x391c0cb3);
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RNDr(S, W, 53, 0x4ed8aa4a);
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RNDr(S, W, 54, 0x5b9cca4f);
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RNDr(S, W, 55, 0x682e6ff3);
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RNDr(S, W, 56, 0x748f82ee);
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RNDr(S, W, 57, 0x78a5636f);
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RNDr(S, W, 58, 0x84c87814);
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RNDr(S, W, 59, 0x8cc70208);
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RNDr(S, W, 60, 0x90befffa);
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RNDr(S, W, 61, 0xa4506ceb);
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RNDr(S, W, 62, 0xbef9a3f7);
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RNDr(S, W, 63, 0xc67178f2);
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RNDr(S, W, 0, 0x428a2f98);
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RNDr(S, W, 1, 0x71374491);
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RNDr(S, W, 2, 0xb5c0fbcf);
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RNDr(S, W, 3, 0xe9b5dba5);
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RNDr(S, W, 4, 0x3956c25b);
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RNDr(S, W, 5, 0x59f111f1);
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RNDr(S, W, 6, 0x923f82a4);
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RNDr(S, W, 7, 0xab1c5ed5);
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RNDr(S, W, 8, 0xd807aa98);
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RNDr(S, W, 9, 0x12835b01);
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RNDr(S, W, 10, 0x243185be);
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RNDr(S, W, 11, 0x550c7dc3);
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RNDr(S, W, 12, 0x72be5d74);
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RNDr(S, W, 13, 0x80deb1fe);
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RNDr(S, W, 14, 0x9bdc06a7);
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RNDr(S, W, 15, 0xc19bf174);
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RNDr(S, W, 16, 0xe49b69c1);
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RNDr(S, W, 17, 0xefbe4786);
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RNDr(S, W, 18, 0x0fc19dc6);
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RNDr(S, W, 19, 0x240ca1cc);
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RNDr(S, W, 20, 0x2de92c6f);
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RNDr(S, W, 21, 0x4a7484aa);
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RNDr(S, W, 22, 0x5cb0a9dc);
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RNDr(S, W, 23, 0x76f988da);
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RNDr(S, W, 24, 0x983e5152);
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RNDr(S, W, 25, 0xa831c66d);
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RNDr(S, W, 26, 0xb00327c8);
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RNDr(S, W, 27, 0xbf597fc7);
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RNDr(S, W, 28, 0xc6e00bf3);
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RNDr(S, W, 29, 0xd5a79147);
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RNDr(S, W, 30, 0x06ca6351);
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RNDr(S, W, 31, 0x14292967);
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RNDr(S, W, 32, 0x27b70a85);
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RNDr(S, W, 33, 0x2e1b2138);
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RNDr(S, W, 34, 0x4d2c6dfc);
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RNDr(S, W, 35, 0x53380d13);
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RNDr(S, W, 36, 0x650a7354);
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RNDr(S, W, 37, 0x766a0abb);
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RNDr(S, W, 38, 0x81c2c92e);
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RNDr(S, W, 39, 0x92722c85);
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RNDr(S, W, 40, 0xa2bfe8a1);
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RNDr(S, W, 41, 0xa81a664b);
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RNDr(S, W, 42, 0xc24b8b70);
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RNDr(S, W, 43, 0xc76c51a3);
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RNDr(S, W, 44, 0xd192e819);
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RNDr(S, W, 45, 0xd6990624);
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RNDr(S, W, 46, 0xf40e3585);
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RNDr(S, W, 47, 0x106aa070);
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RNDr(S, W, 48, 0x19a4c116);
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RNDr(S, W, 49, 0x1e376c08);
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RNDr(S, W, 50, 0x2748774c);
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RNDr(S, W, 51, 0x34b0bcb5);
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RNDr(S, W, 52, 0x391c0cb3);
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RNDr(S, W, 53, 0x4ed8aa4a);
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RNDr(S, W, 54, 0x5b9cca4f);
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RNDr(S, W, 55, 0x682e6ff3);
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RNDr(S, W, 56, 0x748f82ee);
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RNDr(S, W, 57, 0x78a5636f);
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RNDr(S, W, 58, 0x84c87814);
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RNDr(S, W, 59, 0x8cc70208);
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RNDr(S, W, 60, 0x90befffa);
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RNDr(S, W, 61, 0xa4506ceb);
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RNDr(S, W, 62, 0xbef9a3f7);
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RNDr(S, W, 63, 0xc67178f2);
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/* 4. Mix local working variables into global state */
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for (i = 0; i < 8; i++)
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state[i] += S[i];
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for (i = 0; i < 8; i++) {
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state[i] += S[i];
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}
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/* Clean the stack. */
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sodium_memzero(W, 256);
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sodium_memzero(S, 32);
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t0 = t1 = 0;
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sodium_memzero(W, 256);
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sodium_memzero(S, 32);
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t0 = t1 = 0;
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}
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static unsigned char PAD[64] = {
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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/* Add padding and terminating bit-count. */
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static void
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SHA256_Pad(SHA256_CTX * ctx)
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SHA256_Pad(crypto_hash_sha256_state * ctx)
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{
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unsigned char len[8];
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uint32_t r, plen;
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unsigned char len[8];
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uint32_t r, plen;
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/*
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* Convert length to a vector of bytes -- we do this now rather
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* than later because the length will change after we pad.
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*/
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be32enc_vect(len, ctx->count, 8);
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be32enc_vect(len, ctx->count, 8);
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/* Add 1--64 bytes so that the resulting length is 56 mod 64 */
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r = (ctx->count[1] >> 3) & 0x3f;
|
||||
plen = (r < 56) ? (56 - r) : (120 - r);
|
||||
_SHA256_Update(ctx, PAD, (size_t)plen);
|
||||
r = (ctx->count[1] >> 3) & 0x3f;
|
||||
plen = (r < 56) ? (56 - r) : (120 - r);
|
||||
_SHA256_Update(ctx, PAD, (size_t)plen);
|
||||
|
||||
/* Add the terminating bit-count */
|
||||
_SHA256_Update(ctx, len, 8);
|
||||
_SHA256_Update(ctx, len, 8);
|
||||
}
|
||||
|
||||
/* SHA-256 initialization. Begins a SHA-256 operation. */
|
||||
static void
|
||||
_SHA256_Init(SHA256_CTX * ctx)
|
||||
_SHA256_Init(crypto_hash_sha256_state * ctx)
|
||||
{
|
||||
ctx->count[0] = ctx->count[1] = 0;
|
||||
|
||||
/* Zero bits processed so far */
|
||||
ctx->count[0] = ctx->count[1] = 0;
|
||||
|
||||
/* Magic initialization constants */
|
||||
ctx->state[0] = 0x6A09E667;
|
||||
ctx->state[1] = 0xBB67AE85;
|
||||
ctx->state[2] = 0x3C6EF372;
|
||||
ctx->state[3] = 0xA54FF53A;
|
||||
ctx->state[4] = 0x510E527F;
|
||||
ctx->state[5] = 0x9B05688C;
|
||||
ctx->state[6] = 0x1F83D9AB;
|
||||
ctx->state[7] = 0x5BE0CD19;
|
||||
ctx->state[0] = 0x6A09E667;
|
||||
ctx->state[1] = 0xBB67AE85;
|
||||
ctx->state[2] = 0x3C6EF372;
|
||||
ctx->state[3] = 0xA54FF53A;
|
||||
ctx->state[4] = 0x510E527F;
|
||||
ctx->state[5] = 0x9B05688C;
|
||||
ctx->state[6] = 0x1F83D9AB;
|
||||
ctx->state[7] = 0x5BE0CD19;
|
||||
}
|
||||
|
||||
/* Add bytes into the hash */
|
||||
static void
|
||||
_SHA256_Update(SHA256_CTX * ctx, const void *in, size_t len)
|
||||
_SHA256_Update(crypto_hash_sha256_state * ctx, const void *in, size_t len)
|
||||
{
|
||||
uint32_t bitlen[2];
|
||||
uint32_t r;
|
||||
const unsigned char *src = (const unsigned char *) in;
|
||||
uint32_t bitlen[2];
|
||||
uint32_t r;
|
||||
const unsigned char *src = (const unsigned char *) in;
|
||||
|
||||
/* Number of bytes left in the buffer from previous updates */
|
||||
r = (ctx->count[1] >> 3) & 0x3f;
|
||||
r = (ctx->count[1] >> 3) & 0x3f;
|
||||
|
||||
/* Convert the length into a number of bits */
|
||||
bitlen[1] = ((uint32_t)len) << 3;
|
||||
bitlen[0] = (uint32_t)(len >> 29);
|
||||
bitlen[1] = ((uint32_t)len) << 3;
|
||||
bitlen[0] = (uint32_t)(len >> 29);
|
||||
|
||||
/* Update number of bits */
|
||||
if ((ctx->count[1] += bitlen[1]) < bitlen[1])
|
||||
ctx->count[0]++;
|
||||
ctx->count[0] += bitlen[0];
|
||||
if ((ctx->count[1] += bitlen[1]) < bitlen[1]) {
|
||||
ctx->count[0]++;
|
||||
}
|
||||
ctx->count[0] += bitlen[0];
|
||||
|
||||
/* Handle the case where we don't need to perform any transforms */
|
||||
if (len < 64 - r) {
|
||||
memcpy(&ctx->buf[r], src, len);
|
||||
return;
|
||||
}
|
||||
if (len < 64 - r) {
|
||||
memcpy(&ctx->buf[r], src, len);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Finish the current block */
|
||||
memcpy(&ctx->buf[r], src, 64 - r);
|
||||
SHA256_Transform(ctx->state, ctx->buf);
|
||||
src += 64 - r;
|
||||
len -= 64 - r;
|
||||
memcpy(&ctx->buf[r], src, 64 - r);
|
||||
SHA256_Transform(ctx->state, ctx->buf);
|
||||
src += 64 - r;
|
||||
len -= 64 - r;
|
||||
|
||||
/* Perform complete blocks */
|
||||
while (len >= 64) {
|
||||
SHA256_Transform(ctx->state, src);
|
||||
src += 64;
|
||||
len -= 64;
|
||||
}
|
||||
|
||||
/* Copy left over data into buffer */
|
||||
memcpy(ctx->buf, src, len);
|
||||
while (len >= 64) {
|
||||
SHA256_Transform(ctx->state, src);
|
||||
src += 64;
|
||||
len -= 64;
|
||||
}
|
||||
memcpy(ctx->buf, src, len);
|
||||
}
|
||||
|
||||
/*
|
||||
* SHA-256 finalization. Pads the input data, exports the hash value,
|
||||
* and clears the context state.
|
||||
*/
|
||||
static void
|
||||
_SHA256_Final(unsigned char digest[32], SHA256_CTX * ctx)
|
||||
_SHA256_Final(unsigned char digest[32], crypto_hash_sha256_state * ctx)
|
||||
{
|
||||
|
||||
/* Add padding */
|
||||
SHA256_Pad(ctx);
|
||||
|
||||
/* Write the hash */
|
||||
be32enc_vect(digest, ctx->state, 32);
|
||||
|
||||
/* Clear the context state */
|
||||
sodium_memzero((void *)ctx, sizeof(*ctx));
|
||||
SHA256_Pad(ctx);
|
||||
be32enc_vect(digest, ctx->state, 32);
|
||||
sodium_memzero((void *)ctx, sizeof(*ctx));
|
||||
}
|
||||
|
||||
/* Initialize an HMAC-SHA256 operation with the given key. */
|
||||
static void
|
||||
HMAC__SHA256_Init(HMAC_SHA256_CTX * ctx, const void * _K, size_t Klen)
|
||||
HMAC__SHA256_Init(crypto_hmac_sha256_state * ctx, const void * _K, size_t Klen)
|
||||
{
|
||||
unsigned char pad[64];
|
||||
unsigned char khash[32];
|
||||
const unsigned char * K = (const unsigned char *) _K;
|
||||
size_t i;
|
||||
unsigned char pad[64];
|
||||
unsigned char khash[32];
|
||||
const unsigned char * K = (const unsigned char *) _K;
|
||||
size_t i;
|
||||
|
||||
/* If Klen > 64, the key is really SHA256(K). */
|
||||
if (Klen > 64) {
|
||||
_SHA256_Init(&ctx->ictx);
|
||||
_SHA256_Update(&ctx->ictx, K, Klen);
|
||||
_SHA256_Final(khash, &ctx->ictx);
|
||||
K = khash;
|
||||
Klen = 32;
|
||||
}
|
||||
if (Klen > 64) {
|
||||
_SHA256_Init(&ctx->ictx);
|
||||
_SHA256_Update(&ctx->ictx, K, Klen);
|
||||
_SHA256_Final(khash, &ctx->ictx);
|
||||
K = khash;
|
||||
Klen = 32;
|
||||
}
|
||||
_SHA256_Init(&ctx->ictx);
|
||||
memset(pad, 0x36, 64);
|
||||
for (i = 0; i < Klen; i++) {
|
||||
pad[i] ^= K[i];
|
||||
}
|
||||
_SHA256_Update(&ctx->ictx, pad, 64);
|
||||
|
||||
/* Inner SHA256 operation is SHA256(K xor [block of 0x36] || data). */
|
||||
_SHA256_Init(&ctx->ictx);
|
||||
memset(pad, 0x36, 64);
|
||||
for (i = 0; i < Klen; i++)
|
||||
pad[i] ^= K[i];
|
||||
_SHA256_Update(&ctx->ictx, pad, 64);
|
||||
_SHA256_Init(&ctx->octx);
|
||||
memset(pad, 0x5c, 64);
|
||||
for (i = 0; i < Klen; i++) {
|
||||
pad[i] ^= K[i];
|
||||
}
|
||||
_SHA256_Update(&ctx->octx, pad, 64);
|
||||
|
||||
/* Outer SHA256 operation is SHA256(K xor [block of 0x5c] || hash). */
|
||||
_SHA256_Init(&ctx->octx);
|
||||
memset(pad, 0x5c, 64);
|
||||
for (i = 0; i < Klen; i++)
|
||||
pad[i] ^= K[i];
|
||||
_SHA256_Update(&ctx->octx, pad, 64);
|
||||
|
||||
/* Clean the stack. */
|
||||
sodium_memzero(khash, 32);
|
||||
sodium_memzero(khash, 32);
|
||||
}
|
||||
|
||||
/* Add bytes to the HMAC-SHA256 operation. */
|
||||
void
|
||||
HMAC__SHA256_Update(HMAC_SHA256_CTX * ctx, const void *in, size_t len)
|
||||
static void
|
||||
HMAC__SHA256_Update(crypto_hmac_sha256_state * ctx, const void *in, size_t len)
|
||||
{
|
||||
|
||||
/* Feed data to the inner SHA256 operation. */
|
||||
_SHA256_Update(&ctx->ictx, in, len);
|
||||
_SHA256_Update(&ctx->ictx, in, len);
|
||||
}
|
||||
|
||||
/* Finish an HMAC-SHA256 operation. */
|
||||
static void
|
||||
HMAC__SHA256_Final(unsigned char digest[32], HMAC_SHA256_CTX * ctx)
|
||||
HMAC__SHA256_Final(unsigned char digest[32], crypto_hmac_sha256_state * ctx)
|
||||
{
|
||||
unsigned char ihash[32];
|
||||
unsigned char ihash[32];
|
||||
|
||||
/* Finish the inner SHA256 operation. */
|
||||
_SHA256_Final(ihash, &ctx->ictx);
|
||||
_SHA256_Final(ihash, &ctx->ictx);
|
||||
_SHA256_Update(&ctx->octx, ihash, 32);
|
||||
_SHA256_Final(digest, &ctx->octx);
|
||||
|
||||
/* Feed the inner hash to the outer SHA256 operation. */
|
||||
_SHA256_Update(&ctx->octx, ihash, 32);
|
||||
|
||||
/* Finish the outer SHA256 operation. */
|
||||
_SHA256_Final(digest, &ctx->octx);
|
||||
|
||||
/* Clean the stack. */
|
||||
sodium_memzero(ihash, 32);
|
||||
sodium_memzero(ihash, 32);
|
||||
}
|
||||
|
||||
int
|
||||
crypto_auth(unsigned char *out, const unsigned char *in,
|
||||
unsigned long long inlen, const unsigned char *k)
|
||||
{
|
||||
HMAC_SHA256_CTX ctx;
|
||||
{
|
||||
crypto_hmac_sha256_state ctx;
|
||||
|
||||
if (inlen > SIZE_MAX) {
|
||||
memset(out, 0, crypto_auth_BYTES);
|
||||
@ -412,6 +353,6 @@ crypto_auth(unsigned char *out, const unsigned char *in,
|
||||
HMAC__SHA256_Init(&ctx, k, crypto_auth_KEYBYTES);
|
||||
HMAC__SHA256_Update(&ctx, in, (size_t) inlen);
|
||||
HMAC__SHA256_Final(out, &ctx);
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user