From 4035e0e79c609bde30a2f755eec864771ea08e21 Mon Sep 17 00:00:00 2001 From: Pavel Tvrdík Date: Fri, 13 Nov 2015 16:13:15 +0100 Subject: Add SHA-224/256 and HMAC-SHA-224/256 crypto hash --- lib/sha256.h | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 lib/sha256.h (limited to 'lib/sha256.h') diff --git a/lib/sha256.h b/lib/sha256.h new file mode 100644 index 00000000..848d2176 --- /dev/null +++ b/lib/sha256.h @@ -0,0 +1,71 @@ +/* + * BIRD Library -- SHA-256 and SHA-224 Hash Functions, + * HMAC-SHA-256 and HMAC-SHA-224 Functions + * + * (c) 2015 CZ.NIC z.s.p.o. + * + * Based on the code from libgcrypt-1.6.0, which is + * (c) 2003, 2006, 2008, 2009 Free Software Foundation, Inc. + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#ifndef _BIRD_SHA256_H_ +#define _BIRD_SHA256_H_ + +#include "nest/bird.h" + +#define SHA224_SIZE 28 +#define SHA224_HEX_SIZE 57 +#define SHA224_BLOCK_SIZE 64 + +#define SHA256_SIZE 32 +#define SHA256_HEX_SIZE 65 +#define SHA256_BLOCK_SIZE 64 + +struct sha256_context { + u32 h0,h1,h2,h3,h4,h5,h6,h7; + byte buf[128]; /* 128 is for SHA384 and SHA512 support, otherwise for SHA224 and SHA256 is 64 enough */ + u32 nblocks; + u32 nblocks_high; + int count; + u32 blocksize; + uint (*transform)(void *c, const byte *blks, size_t nblks); +}; +#define sha224_context sha256_context /* aliasing 'struct sha224_context' to 'struct sha256_context' */ + +void sha256_init(struct sha256_context *ctx); +void sha224_init(struct sha224_context *ctx); + +void sha256_update(struct sha256_context *ctx, const byte *in_buf, size_t in_len); +static inline void sha224_update(struct sha224_context *ctx, const byte *in_buf, size_t in_len) +{ + sha256_update(ctx, in_buf, in_len); +} + +byte* sha256_final(struct sha256_context *ctx); +static inline byte* sha224_final(struct sha224_context *ctx) +{ + return sha256_final(ctx); +} + +/* + * HMAC-SHA256, HMAC-SHA224 + */ +struct sha256_hmac_context +{ + struct sha256_context ictx; + struct sha256_context octx; +}; +#define sha224_hmac_context sha256_hmac_context /* aliasing 'struct sha224_hmac_context' to 'struct sha256_hmac_context' */ + +void sha256_hmac_init(struct sha256_hmac_context *ctx, const byte *key, size_t keylen); +void sha224_hmac_init(struct sha224_hmac_context *ctx, const byte *key, size_t keylen); + +void sha256_hmac_update(struct sha256_hmac_context *ctx, const byte *buf, size_t buflen); +void sha224_hmac_update(struct sha224_hmac_context *ctx, const byte *buf, size_t buflen); + +byte *sha256_hmac_final(struct sha256_hmac_context *ctx); +byte *sha224_hmac_final(struct sha224_hmac_context *ctx); + +#endif /* _BIRD_SHA256_H_ */ -- cgit v1.2.3 From 5126380beace4e39578f005fe115917b8e8b8ff3 Mon Sep 17 00:00:00 2001 From: "Ondrej Zajicek (work)" Date: Tue, 24 Nov 2015 13:47:28 +0100 Subject: Minor changes to SHA hash functions --- lib/birdlib.h | 1 + lib/sha1.c | 176 ++++++++++---------- lib/sha1.h | 72 ++++---- lib/sha256.c | 176 +++++++++----------- lib/sha256.h | 42 ++--- lib/sha512.c | 528 +++++++++++++++++++++++++++++----------------------------- lib/sha512.h | 42 ++--- 7 files changed, 517 insertions(+), 520 deletions(-) (limited to 'lib/sha256.h') diff --git a/lib/birdlib.h b/lib/birdlib.h index ad41dca3..16f437ef 100644 --- a/lib/birdlib.h +++ b/lib/birdlib.h @@ -30,6 +30,7 @@ #define MAX(a,b) MAX_(a,b) #endif +#define U64(c) UINT64_C(c) #define ABS(a) ((a)>=0 ? (a) : -(a)) #define DELTA(a,b) (((a)>=(b))?(a)-(b):(b)-(a)) #define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a))) diff --git a/lib/sha1.c b/lib/sha1.c index dd29b5fd..73b4b280 100644 --- a/lib/sha1.c +++ b/lib/sha1.c @@ -15,33 +15,35 @@ #include "lib/sha1.h" #include "lib/unaligned.h" + void -sha1_init(struct sha1_context *hd) +sha1_init(struct sha1_context *ctx) { - hd->h0 = 0x67452301; - hd->h1 = 0xefcdab89; - hd->h2 = 0x98badcfe; - hd->h3 = 0x10325476; - hd->h4 = 0xc3d2e1f0; - hd->nblocks = 0; - hd->count = 0; + ctx->h0 = 0x67452301; + ctx->h1 = 0xefcdab89; + ctx->h2 = 0x98badcfe; + ctx->h3 = 0x10325476; + ctx->h4 = 0xc3d2e1f0; + + ctx->nblocks = 0; + ctx->count = 0; } /* * Transform the message X which consists of 16 32-bit-words */ static void -sha1_transform(struct sha1_context *hd, const byte *data) +sha1_transform(struct sha1_context *ctx, const byte *data) { u32 a,b,c,d,e,tm; u32 x[16]; /* Get values from the chaining vars. */ - a = hd->h0; - b = hd->h1; - c = hd->h2; - d = hd->h3; - e = hd->h4; + a = ctx->h0; + b = ctx->h1; + c = ctx->h2; + d = ctx->h3; + e = ctx->h4; #ifdef CPU_BIG_ENDIAN memcpy(x, data, 64); @@ -69,7 +71,7 @@ sha1_transform(struct sha1_context *hd, const byte *data) do \ { \ e += ROL(a, 5) + f(b, c, d) + k + m; \ - b = ROL( b, 30 ); \ + b = ROL(b, 30); \ } while(0) R( a, b, c, d, e, F1, K1, x[ 0] ); @@ -154,72 +156,72 @@ sha1_transform(struct sha1_context *hd, const byte *data) R( b, c, d, e, a, F4, K4, M(79) ); /* Update chaining vars. */ - hd->h0 += a; - hd->h1 += b; - hd->h2 += c; - hd->h3 += d; - hd->h4 += e; + ctx->h0 += a; + ctx->h1 += b; + ctx->h2 += c; + ctx->h3 += d; + ctx->h4 += e; } /* - * Update the message digest with the contents - * of INBUF with length INLEN. + * Update the message digest with the contents of BUF with length LEN. */ void -sha1_update(struct sha1_context *hd, const byte *inbuf, uint inlen) +sha1_update(struct sha1_context *ctx, const byte *buf, uint len) { - if (hd->count == 64) /* flush the buffer */ + if (ctx->count) { - sha1_transform(hd, hd->buf); - hd->count = 0; - hd->nblocks++; - } - if (!inbuf) - return; + /* Fill rest of internal buffer */ + for (; len && ctx->count < SHA1_BLOCK_SIZE; len--) + ctx->buf[ctx->count++] = *buf++; - if (hd->count) - { - for (; inlen && hd->count < 64; inlen--) - hd->buf[hd->count++] = *inbuf++; - sha1_update( hd, NULL, 0 ); - if(!inlen) + if (ctx->count < SHA1_BLOCK_SIZE) return; + + /* Process data from internal buffer */ + sha1_transform(ctx, ctx->buf); + ctx->nblocks++; + ctx->count = 0; } - while (inlen >= 64) + if (!len) + return; + + /* Process data from input buffer */ + while (len >= SHA1_BLOCK_SIZE) { - sha1_transform(hd, inbuf); - hd->count = 0; - hd->nblocks++; - inlen -= 64; - inbuf += 64; + sha1_transform(ctx, buf); + ctx->nblocks++; + buf += SHA1_BLOCK_SIZE; + len -= SHA1_BLOCK_SIZE; } - for (; inlen && hd->count < 64; inlen--) - hd->buf[hd->count++] = *inbuf++; + + /* Copy remaining data to internal buffer */ + memcpy(ctx->buf, buf, len); + ctx->count = len; } /* - * The routine final terminates the computation and - * returns the digest. - * The handle is prepared for a new cycle, but adding bytes to the - * handle will the destroy the returned buffer. + * The routine final terminates the computation and returns the digest. The + * handle is prepared for a new cycle, but adding bytes to the handle will the + * destroy the returned buffer. + * * Returns: 20 bytes representing the digest. */ byte * -sha1_final(struct sha1_context *hd) +sha1_final(struct sha1_context *ctx) { u32 t, msb, lsb; - u32 *p; - sha1_update(hd, NULL, 0); /* flush */; + sha1_update(ctx, NULL, 0); /* flush */ - t = hd->nblocks; + t = ctx->nblocks; /* multiply by 64 to make a byte count */ lsb = t << 6; msb = t >> 26; /* add the count */ t = lsb; - if ((lsb += hd->count) < t) + if ((lsb += ctx->count) < t) msb++; /* multiply by 8 to make a bit count */ t = lsb; @@ -227,33 +229,36 @@ sha1_final(struct sha1_context *hd) msb <<= 3; msb |= t >> 29; - if (hd->count < 56) /* enough room */ + if (ctx->count < 56) { - hd->buf[hd->count++] = 0x80; /* pad */ - while (hd->count < 56) - hd->buf[hd->count++] = 0; /* pad */ + /* enough room */ + ctx->buf[ctx->count++] = 0x80; /* pad */ + while (ctx->count < 56) + ctx->buf[ctx->count++] = 0; /* pad */ } - else /* need one extra block */ + else { - hd->buf[hd->count++] = 0x80; /* pad character */ - while (hd->count < 64) - hd->buf[hd->count++] = 0; - sha1_update(hd, NULL, 0); /* flush */; - memset(hd->buf, 0, 56 ); /* fill next block with zeroes */ + /* need one extra block */ + ctx->buf[ctx->count++] = 0x80; /* pad character */ + while (ctx->count < 64) + ctx->buf[ctx->count++] = 0; + sha1_update(ctx, NULL, 0); /* flush */ + memset(ctx->buf, 0, 56); /* fill next block with zeroes */ } + /* append the 64 bit count */ - hd->buf[56] = msb >> 24; - hd->buf[57] = msb >> 16; - hd->buf[58] = msb >> 8; - hd->buf[59] = msb ; - hd->buf[60] = lsb >> 24; - hd->buf[61] = lsb >> 16; - hd->buf[62] = lsb >> 8; - hd->buf[63] = lsb ; - sha1_transform(hd, hd->buf); - - p = (u32*) hd->buf; -#define X(a) do { put_u32(p, hd->h##a); p++; } while(0) + ctx->buf[56] = msb >> 24; + ctx->buf[57] = msb >> 16; + ctx->buf[58] = msb >> 8; + ctx->buf[59] = msb; + ctx->buf[60] = lsb >> 24; + ctx->buf[61] = lsb >> 16; + ctx->buf[62] = lsb >> 8; + ctx->buf[63] = lsb; + sha1_transform(ctx, ctx->buf); + + byte *p = ctx->buf; +#define X(a) do { put_u32(p, ctx->h##a); p += 4; } while(0) X(0); X(1); X(2); @@ -261,12 +266,12 @@ sha1_final(struct sha1_context *hd) X(4); #undef X - return hd->buf; + return ctx->buf; } /* - * SHA1-HMAC + * SHA1-HMAC */ /* @@ -292,12 +297,12 @@ sha1_hmac_init(struct sha1_hmac_context *ctx, const byte *key, uint keylen) if (keylen <= SHA1_BLOCK_SIZE) { memcpy(keybuf, key, keylen); - bzero(keybuf + keylen, SHA1_BLOCK_SIZE - keylen); + memset(keybuf + keylen, 0, SHA1_BLOCK_SIZE - keylen); } else { sha1_hash_buffer(keybuf, key, keylen); - bzero(keybuf + SHA1_SIZE, SHA1_BLOCK_SIZE - SHA1_SIZE); + memset(keybuf + SHA1_SIZE, 0, SHA1_BLOCK_SIZE - SHA1_SIZE); } /* Initialize the inner digest */ @@ -321,7 +326,8 @@ sha1_hmac_update(struct sha1_hmac_context *ctx, const byte *data, uint datalen) sha1_update(&ctx->ictx, data, datalen); } -byte *sha1_hmac_final(struct sha1_hmac_context *ctx) +byte * +sha1_hmac_final(struct sha1_hmac_context *ctx) { /* Finish the inner digest */ byte *isha = sha1_final(&ctx->ictx); @@ -334,9 +340,9 @@ byte *sha1_hmac_final(struct sha1_hmac_context *ctx) void sha1_hmac(byte *outbuf, const byte *key, uint keylen, const byte *data, uint datalen) { - struct sha1_hmac_context hd; - sha1_hmac_init(&hd, key, keylen); - sha1_hmac_update(&hd, data, datalen); - byte *osha = sha1_hmac_final(&hd); - memcpy(outbuf, osha, SHA1_SIZE); + struct sha1_hmac_context ctx; + + sha1_hmac_init(&ctx, key, keylen); + sha1_hmac_update(&ctx, data, datalen); + memcpy(outbuf, sha1_hmac_final(&ctx), SHA1_SIZE); } diff --git a/lib/sha1.h b/lib/sha1.h index 425160a0..c019bb49 100644 --- a/lib/sha1.h +++ b/lib/sha1.h @@ -17,70 +17,70 @@ #include "nest/bird.h" + +#define SHA1_SIZE 20 /* Size of the SHA1 hash in its binary representation */ +#define SHA1_HEX_SIZE 41 /* Buffer length for a string containing SHA1 in hexadecimal format. */ +#define SHA1_BLOCK_SIZE 64 /* SHA1 splits input to blocks of this size. */ + + /* * Internal SHA1 state. * You should use it just as an opaque handle only. */ struct sha1_context { - u32 h0,h1,h2,h3,h4; - u32 nblocks; - byte buf[64]; - int count; -} ; + u32 h0, h1, h2, h3, h4; + byte buf[SHA1_BLOCK_SIZE]; + uint nblocks; + uint count; +}; + -void sha1_init(struct sha1_context *hd); /* Initialize new algorithm run in the @hd context. **/ +void sha1_init(struct sha1_context *ctx); /* Initialize new algorithm run in the @ctx context. **/ /* - * Push another @inlen bytes of data pointed to by @inbuf onto the - * SHA1 hash currently in @hd. You can call this any times you want on - * the same hash (and you do not need to reinitialize it by - * @sha1_init()). It has the same effect as concatenating all the data - * together and passing them at once. + * Push another @len bytes of data pointed to by @buf onto the SHA1 hash + * currently in @ctx. You can call this any times you want on the same hash (and + * you do not need to reinitialize it by @sha1_init()). It has the same effect + * as concatenating all the data together and passing them at once. */ -void sha1_update(struct sha1_context *hd, const byte *inbuf, uint inlen); +void sha1_update(struct sha1_context *ctx, const byte *buf, uint len); /* - * No more @sha1_update() calls will be done. This terminates the hash - * and returns a pointer to it. - * - * Note that the pointer points into data in the @hd context. If it ceases - * to exist, the pointer becomes invalid. + * No more @sha1_update() calls will be done. This terminates the hash and + * returns a pointer to it. * - * To convert the hash to its usual hexadecimal representation, see - * <>. + * Note that the pointer points into data in the @ctx context. If it ceases to + * exist, the pointer becomes invalid. */ -byte *sha1_final(struct sha1_context *hd); +byte *sha1_final(struct sha1_context *ctx); /* - * A convenience one-shot function for SHA1 hash. - * It is equivalent to this snippet of code: + * A convenience one-shot function for SHA1 hash. It is equivalent to this + * snippet of code: * - * sha1_context hd; - * sha1_init(&hd); - * sha1_update(&hd, buffer, length); - * memcpy(outbuf, sha1_final(&hd), SHA1_SIZE); + * sha1_context ctx; + * sha1_init(&ctx); + * sha1_update(&ctx, buffer, length); + * memcpy(outbuf, sha1_final(&ctx), SHA1_SIZE); */ void sha1_hash_buffer(byte *outbuf, const byte *buffer, uint length); /* - * SHA1 HMAC message authentication. If you provide @key and @data, - * the result will be stored in @outbuf. + * SHA1 HMAC message authentication. If you provide @key and @data, the result + * will be stored in @outbuf. */ void sha1_hmac(byte *outbuf, const byte *key, uint keylen, const byte *data, uint datalen); /* - * The HMAC also exists in a stream version in a way analogous to the - * plain SHA1. Pass this as a context. + * The HMAC also exists in a stream version in a way analogous to the plain + * SHA1. Pass this as a context. */ struct sha1_hmac_context { struct sha1_context ictx; struct sha1_context octx; }; -void sha1_hmac_init(struct sha1_hmac_context *hd, const byte *key, uint keylen); /* Initialize HMAC with context @hd and the given key. See sha1_init(). */ -void sha1_hmac_update(struct sha1_hmac_context *hd, const byte *data, uint datalen); /* Hash another @datalen bytes of data. See sha1_update(). */ -byte *sha1_hmac_final(struct sha1_hmac_context *hd); /* Terminate the HMAC and return a pointer to the allocated hash. See sha1_final(). */ +void sha1_hmac_init(struct sha1_hmac_context *ctx, const byte *key, uint keylen); /* Initialize HMAC with context @ctx and the given key. See sha1_init(). */ +void sha1_hmac_update(struct sha1_hmac_context *ctx, const byte *data, uint datalen); /* Hash another @datalen bytes of data. See sha1_update(). */ +byte *sha1_hmac_final(struct sha1_hmac_context *ctx); /* Terminate the HMAC and return a pointer to the allocated hash. See sha1_final(). */ -#define SHA1_SIZE 20 /* Size of the SHA1 hash in its binary representation **/ -#define SHA1_HEX_SIZE 41 /* Buffer length for a string containing SHA1 in hexadecimal format. **/ -#define SHA1_BLOCK_SIZE 64 /* SHA1 splits input to blocks of this size. **/ #endif /* _BIRD_SHA1_H_ */ diff --git a/lib/sha256.c b/lib/sha256.c index 2d979f90..440245d5 100644 --- a/lib/sha256.c +++ b/lib/sha256.c @@ -13,7 +13,8 @@ #include "lib/sha256.h" #include "lib/unaligned.h" -static uint sha256_transform(void *ctx, const byte *data, size_t nblks); + +// #define SHA256_UNROLLED void sha256_init(struct sha256_context *ctx) @@ -28,10 +29,7 @@ sha256_init(struct sha256_context *ctx) ctx->h7 = 0x5be0cd19; ctx->nblocks = 0; - ctx->nblocks_high = 0; ctx->count = 0; - ctx->blocksize = 64; - ctx->transform = sha256_transform; } void @@ -47,10 +45,7 @@ sha224_init(struct sha224_context *ctx) ctx->h7 = 0xbefa4fa4; ctx->nblocks = 0; - ctx->nblocks_high = 0; ctx->count = 0; - ctx->blocksize = 64; - ctx->transform = sha256_transform; } /* (4.2) same as SHA-1's F1. */ @@ -70,7 +65,7 @@ f3(u32 x, u32 y, u32 z) /* Bitwise rotation of an uint to the right */ static inline u32 ror(u32 x, int n) { - return ( (x >> (n&(32-1))) | (x << ((32-n)&(32-1))) ); + return ((x >> (n&(32-1))) | (x << ((32-n)&(32-1)))); } /* (4.4) */ @@ -112,7 +107,7 @@ sum1(u32 x) 32-bit-words. See FIPS 180-2 for details. */ static uint -sha256_transform_block(struct sha256_context *ctx, const byte *data) +sha256_transform(struct sha256_context *ctx, const byte *data) { static const u32 K[64] = { 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, @@ -148,52 +143,58 @@ sha256_transform_block(struct sha256_context *ctx, const byte *data) for (i = 0; i < 16; i++) w[i] = get_u32(data + i * 4); + for (; i < 64; i++) w[i] = S1(w[i-2]) + w[i-7] + S0(w[i-15]) + w[i-16]; for (i = 0; i < 64;) { +#ifndef SHA256_UNROLLED + R(a,b,c,d,e,f,g,h,K[i],w[i]); + i++; +#else /* Unrolled */ t1 = h + sum1(e) + f1(e, f, g) + K[i] + w[i]; - t2 = sum0 (a) + f3(a, b, c); + t2 = sum0(a) + f3(a, b, c); d += t1; h = t1 + t2; t1 = g + sum1(d) + f1(d, e, f) + K[i+1] + w[i+1]; - t2 = sum0 (h) + f3(h, a, b); + t2 = sum0(h) + f3(h, a, b); c += t1; g = t1 + t2; t1 = f + sum1(c) + f1(c, d, e) + K[i+2] + w[i+2]; - t2 = sum0 (g) + f3(g, h, a); + t2 = sum0(g) + f3(g, h, a); b += t1; f = t1 + t2; t1 = e + sum1(b) + f1(b, c, d) + K[i+3] + w[i+3]; - t2 = sum0 (f) + f3(f, g, h); + t2 = sum0(f) + f3(f, g, h); a += t1; e = t1 + t2; t1 = d + sum1(a) + f1(a, b, c) + K[i+4] + w[i+4]; - t2 = sum0 (e) + f3(e, f, g); + t2 = sum0(e) + f3(e, f, g); h += t1; d = t1 + t2; t1 = c + sum1(h) + f1(h, a, b) + K[i+5] + w[i+5]; - t2 = sum0 (d) + f3(d, e, f); + t2 = sum0(d) + f3(d, e, f); g += t1; c = t1 + t2; t1 = b + sum1(g) + f1(g, h, a) + K[i+6] + w[i+6]; - t2 = sum0 (c) + f3(c, d, e); + t2 = sum0(c) + f3(c, d, e); f += t1; b = t1 + t2; t1 = a + sum1(f) + f1(f, g, h) + K[i+7] + w[i+7]; - t2 = sum0 (b) + f3(b, c, d); + t2 = sum0(b) + f3(b, c, d); e += t1; a = t1 + t2; i += 8; +#endif } ctx->h0 += a; @@ -211,22 +212,6 @@ sha256_transform_block(struct sha256_context *ctx, const byte *data) #undef S1 #undef R -static uint -sha256_transform(void *ctx, const byte *data, size_t nblks) -{ - struct sha256_context *hd = ctx; - uint burn; - - do - { - burn = sha256_transform_block(hd, data); - data += 64; - } - while (--nblks); - - return burn; -} - /* Common function to write a chunk of data to the transform function of a hash algorithm. Note that the use of the term "block" does not imply a fixed size block. Note that we explicitly allow to use @@ -234,65 +219,56 @@ sha256_transform(void *ctx, const byte *data, size_t nblks) not have any meaning but writing after finalize is sometimes helpful to mitigate timing attacks. */ void -sha256_update(struct sha256_context *ctx, const byte *in_buf, size_t in_len) +sha256_update(struct sha256_context *ctx, const byte *buf, size_t len) { - const uint blocksize = ctx->blocksize; - size_t inblocks; + if (ctx->count) + { + /* Fill rest of internal buffer */ + for (; len && ctx->count < SHA256_BLOCK_SIZE; len--) + ctx->buf[ctx->count++] = *buf++; - if (sizeof(ctx->buf) < blocksize) - debug("BUG: in file %s at line %d", __FILE__ , __LINE__); + if (ctx->count < SHA256_BLOCK_SIZE) + return; - if (ctx->count == blocksize) /* Flush the buffer. */ - { - ctx->transform(ctx, ctx->buf, 1); + /* Process data from internal buffer */ + sha256_transform(ctx, ctx->buf); + ctx->nblocks++; ctx->count = 0; - if (!++ctx->nblocks) - ctx->nblocks_high++; } - if (!in_buf) + + if (!len) return; - if (ctx->count) + /* Process data from input buffer */ + while (len >= SHA256_BLOCK_SIZE) { - for (; in_len && ctx->count < blocksize; in_len--) - ctx->buf[ctx->count++] = *in_buf++; - sha256_update(ctx, NULL, 0); - if (!in_len) - return; + sha256_transform(ctx, buf); + ctx->nblocks++; + buf += SHA256_BLOCK_SIZE; + len -= SHA256_BLOCK_SIZE; } - if (in_len >= blocksize) - { - inblocks = in_len / blocksize; - ctx->transform(ctx, in_buf, inblocks); - ctx->count = 0; - ctx->nblocks_high += (ctx->nblocks + inblocks < inblocks); - ctx->nblocks += inblocks; - in_len -= inblocks * blocksize; - in_buf += inblocks * blocksize; - } - for (; in_len && ctx->count < blocksize; in_len--) - ctx->buf[ctx->count++] = *in_buf++; + /* Copy remaining data to internal buffer */ + memcpy(ctx->buf, buf, len); + ctx->count = len; } /* - The routine finally terminates the computation and returns the - digest. The handle is prepared for a new cycle, but adding bytes - to the handle will the destroy the returned buffer. Returns: 32 - bytes with the message the digest. */ -byte* + * The routine finally terminates the computation and returns the digest. The + * handle is prepared for a new cycle, but adding bytes to the handle will the + * destroy the returned buffer. + * + * Returns: 32 bytes with the message the digest. 28 bytes for SHA-224. + */ +byte * sha256_final(struct sha256_context *ctx) { u32 t, th, msb, lsb; - byte *p; - sha256_update(ctx, NULL, 0); /* flush */; + sha256_update(ctx, NULL, 0); /* flush */ t = ctx->nblocks; - if (sizeof t == sizeof ctx->nblocks) - th = ctx->nblocks_high; - else - th = 0; + th = 0; /* multiply by 64 to make a byte count */ lsb = t << 6; @@ -308,26 +284,28 @@ sha256_final(struct sha256_context *ctx) msb |= t >> 29; if (ctx->count < 56) - { /* enough room */ + { + /* enough room */ ctx->buf[ctx->count++] = 0x80; /* pad */ while (ctx->count < 56) ctx->buf[ctx->count++] = 0; /* pad */ } else - { /* need one extra block */ + { + /* need one extra block */ ctx->buf[ctx->count++] = 0x80; /* pad character */ while (ctx->count < 64) ctx->buf[ctx->count++] = 0; sha256_update(ctx, NULL, 0); /* flush */; - memset (ctx->buf, 0, 56 ); /* fill next block with zeroes */ + memset(ctx->buf, 0, 56 ); /* fill next block with zeroes */ } + /* append the 64 bit count */ put_u32(ctx->buf + 56, msb); put_u32(ctx->buf + 60, lsb); - sha256_transform(ctx, ctx->buf, 1); - - p = ctx->buf; + sha256_transform(ctx, ctx->buf); + byte *p = ctx->buf; #define X(a) do { put_u32(p, ctx->h##a); p += 4; } while(0) X(0); X(1); @@ -344,17 +322,17 @@ sha256_final(struct sha256_context *ctx) /* - * SHA256-HMAC + * SHA256-HMAC */ static void sha256_hash_buffer(byte *outbuf, const byte *buffer, size_t length) { - struct sha256_context hd_tmp; + struct sha256_context ctx; - sha256_init(&hd_tmp); - sha256_update(&hd_tmp, buffer, length); - memcpy(outbuf, sha256_final(&hd_tmp), SHA256_SIZE); + sha256_init(&ctx); + sha256_update(&ctx, buffer, length); + memcpy(outbuf, sha256_final(&ctx), SHA256_SIZE); } void @@ -366,12 +344,12 @@ sha256_hmac_init(struct sha256_hmac_context *ctx, const byte *key, size_t keylen if (keylen <= SHA256_BLOCK_SIZE) { memcpy(keybuf, key, keylen); - bzero(keybuf + keylen, SHA256_BLOCK_SIZE - keylen); + memset(keybuf + keylen, 0, SHA256_BLOCK_SIZE - keylen); } else { sha256_hash_buffer(keybuf, key, keylen); - bzero(keybuf + SHA256_SIZE, SHA256_BLOCK_SIZE - SHA256_SIZE); + memset(keybuf + SHA256_SIZE, 0, SHA256_BLOCK_SIZE - SHA256_SIZE); } /* Initialize the inner digest */ @@ -388,13 +366,15 @@ sha256_hmac_init(struct sha256_hmac_context *ctx, const byte *key, size_t keylen sha256_update(&ctx->octx, buf, SHA256_BLOCK_SIZE); } -void sha256_hmac_update(struct sha256_hmac_context *ctx, const byte *buf, size_t buflen) +void +sha256_hmac_update(struct sha256_hmac_context *ctx, const byte *buf, size_t buflen) { /* Just update the inner digest */ sha256_update(&ctx->ictx, buf, buflen); } -byte *sha256_hmac_final(struct sha256_hmac_context *ctx) +byte * +sha256_hmac_final(struct sha256_hmac_context *ctx) { /* Finish the inner digest */ byte *isha = sha256_final(&ctx->ictx); @@ -406,17 +386,17 @@ byte *sha256_hmac_final(struct sha256_hmac_context *ctx) /* - * SHA224-HMAC + * SHA224-HMAC */ static void sha224_hash_buffer(byte *outbuf, const byte *buffer, size_t length) { - struct sha224_context hd_tmp; + struct sha224_context ctx; - sha224_init(&hd_tmp); - sha224_update(&hd_tmp, buffer, length); - memcpy(outbuf, sha224_final(&hd_tmp), SHA224_SIZE); + sha224_init(&ctx); + sha224_update(&ctx, buffer, length); + memcpy(outbuf, sha224_final(&ctx), SHA224_SIZE); } void @@ -428,12 +408,12 @@ sha224_hmac_init(struct sha224_hmac_context *ctx, const byte *key, size_t keylen if (keylen <= SHA224_BLOCK_SIZE) { memcpy(keybuf, key, keylen); - bzero(keybuf + keylen, SHA224_BLOCK_SIZE - keylen); + memset(keybuf + keylen, 0, SHA224_BLOCK_SIZE - keylen); } else { sha224_hash_buffer(keybuf, key, keylen); - bzero(keybuf + SHA224_SIZE, SHA224_BLOCK_SIZE - SHA224_SIZE); + memset(keybuf + SHA224_SIZE, 0, SHA224_BLOCK_SIZE - SHA224_SIZE); } /* Initialize the inner digest */ @@ -450,13 +430,15 @@ sha224_hmac_init(struct sha224_hmac_context *ctx, const byte *key, size_t keylen sha224_update(&ctx->octx, buf, SHA224_BLOCK_SIZE); } -void sha224_hmac_update(struct sha224_hmac_context *ctx, const byte *buf, size_t buflen) +void +sha224_hmac_update(struct sha224_hmac_context *ctx, const byte *buf, size_t buflen) { /* Just update the inner digest */ sha256_update(&ctx->ictx, buf, buflen); } -byte *sha224_hmac_final(struct sha224_hmac_context *ctx) +byte * +sha224_hmac_final(struct sha224_hmac_context *ctx) { /* Finish the inner digest */ byte *isha = sha224_final(&ctx->ictx); diff --git a/lib/sha256.h b/lib/sha256.h index 848d2176..381200a9 100644 --- a/lib/sha256.h +++ b/lib/sha256.h @@ -15,6 +15,7 @@ #include "nest/bird.h" + #define SHA224_SIZE 28 #define SHA224_HEX_SIZE 57 #define SHA224_BLOCK_SIZE 64 @@ -23,44 +24,44 @@ #define SHA256_HEX_SIZE 65 #define SHA256_BLOCK_SIZE 64 + struct sha256_context { - u32 h0,h1,h2,h3,h4,h5,h6,h7; - byte buf[128]; /* 128 is for SHA384 and SHA512 support, otherwise for SHA224 and SHA256 is 64 enough */ - u32 nblocks; - u32 nblocks_high; - int count; - u32 blocksize; - uint (*transform)(void *c, const byte *blks, size_t nblks); + u32 h0, h1, h2, h3, h4, h5, h6, h7; + byte buf[SHA256_BLOCK_SIZE]; + uint nblocks; + uint count; }; -#define sha224_context sha256_context /* aliasing 'struct sha224_context' to 'struct sha256_context' */ + +#define sha224_context sha256_context + void sha256_init(struct sha256_context *ctx); void sha224_init(struct sha224_context *ctx); -void sha256_update(struct sha256_context *ctx, const byte *in_buf, size_t in_len); -static inline void sha224_update(struct sha224_context *ctx, const byte *in_buf, size_t in_len) -{ - sha256_update(ctx, in_buf, in_len); -} +void sha256_update(struct sha256_context *ctx, const byte *buf, size_t len); +static inline void sha224_update(struct sha224_context *ctx, const byte *buf, size_t len) +{ sha256_update(ctx, buf, len); } + +byte *sha256_final(struct sha256_context *ctx); +static inline byte *sha224_final(struct sha224_context *ctx) +{ return sha256_final(ctx); } -byte* sha256_final(struct sha256_context *ctx); -static inline byte* sha224_final(struct sha224_context *ctx) -{ - return sha256_final(ctx); -} /* * HMAC-SHA256, HMAC-SHA224 */ + struct sha256_hmac_context { struct sha256_context ictx; struct sha256_context octx; }; -#define sha224_hmac_context sha256_hmac_context /* aliasing 'struct sha224_hmac_context' to 'struct sha256_hmac_context' */ + +#define sha224_hmac_context sha256_hmac_context + void sha256_hmac_init(struct sha256_hmac_context *ctx, const byte *key, size_t keylen); -void sha224_hmac_init(struct sha224_hmac_context *ctx, const byte *key, size_t keylen); +void sha224_hmac_init(struct sha224_hmac_context *ctx, const byte *key, size_t keylen); void sha256_hmac_update(struct sha256_hmac_context *ctx, const byte *buf, size_t buflen); void sha224_hmac_update(struct sha224_hmac_context *ctx, const byte *buf, size_t buflen); @@ -68,4 +69,5 @@ void sha224_hmac_update(struct sha224_hmac_context *ctx, const byte *buf, size_t byte *sha256_hmac_final(struct sha256_hmac_context *ctx); byte *sha224_hmac_final(struct sha224_hmac_context *ctx); + #endif /* _BIRD_SHA256_H_ */ diff --git a/lib/sha512.c b/lib/sha512.c index e46e4c98..37e660f7 100644 --- a/lib/sha512.c +++ b/lib/sha512.c @@ -10,57 +10,42 @@ * Can be freely distributed and used under the terms of the GNU GPL. */ -#include "lib/sha256.h" #include "lib/sha512.h" #include "lib/unaligned.h" -static uint sha512_transform(void *context, const byte *data, size_t nblks); + +// #define SHA512_UNROLLED void sha512_init(struct sha512_context *ctx) { - struct sha512_state *hd = &ctx->state; - - hd->h0 = UINT64_C(0x6a09e667f3bcc908); - hd->h1 = UINT64_C(0xbb67ae8584caa73b); - hd->h2 = UINT64_C(0x3c6ef372fe94f82b); - hd->h3 = UINT64_C(0xa54ff53a5f1d36f1); - hd->h4 = UINT64_C(0x510e527fade682d1); - hd->h5 = UINT64_C(0x9b05688c2b3e6c1f); - hd->h6 = UINT64_C(0x1f83d9abfb41bd6b); - hd->h7 = UINT64_C(0x5be0cd19137e2179); - - ctx->bctx.nblocks = 0; - ctx->bctx.nblocks_high = 0; - ctx->bctx.count = 0; - ctx->bctx.blocksize = 128; - ctx->bctx.transform = sha512_transform; + ctx->h0 = U64(0x6a09e667f3bcc908); + ctx->h1 = U64(0xbb67ae8584caa73b); + ctx->h2 = U64(0x3c6ef372fe94f82b); + ctx->h3 = U64(0xa54ff53a5f1d36f1); + ctx->h4 = U64(0x510e527fade682d1); + ctx->h5 = U64(0x9b05688c2b3e6c1f); + ctx->h6 = U64(0x1f83d9abfb41bd6b); + ctx->h7 = U64(0x5be0cd19137e2179); + + ctx->nblocks = 0; + ctx->count = 0; } void sha384_init(struct sha384_context *ctx) { - struct sha512_state *hd = &ctx->state; - - hd->h0 = UINT64_C(0xcbbb9d5dc1059ed8); - hd->h1 = UINT64_C(0x629a292a367cd507); - hd->h2 = UINT64_C(0x9159015a3070dd17); - hd->h3 = UINT64_C(0x152fecd8f70e5939); - hd->h4 = UINT64_C(0x67332667ffc00b31); - hd->h5 = UINT64_C(0x8eb44a8768581511); - hd->h6 = UINT64_C(0xdb0c2e0d64f98fa7); - hd->h7 = UINT64_C(0x47b5481dbefa4fa4); - - ctx->bctx.nblocks = 0; - ctx->bctx.nblocks_high = 0; - ctx->bctx.count = 0; - ctx->bctx.blocksize = 128; - ctx->bctx.transform = sha512_transform; -} - -void sha512_update(struct sha512_context *ctx, const byte *in_buf, size_t in_len) -{ - sha256_update(&ctx->bctx, in_buf, in_len); + ctx->h0 = U64(0xcbbb9d5dc1059ed8); + ctx->h1 = U64(0x629a292a367cd507); + ctx->h2 = U64(0x9159015a3070dd17); + ctx->h3 = U64(0x152fecd8f70e5939); + ctx->h4 = U64(0x67332667ffc00b31); + ctx->h5 = U64(0x8eb44a8768581511); + ctx->h6 = U64(0xdb0c2e0d64f98fa7); + ctx->h7 = U64(0x47b5481dbefa4fa4); + + ctx->nblocks = 0; + ctx->count = 0; } static inline u64 @@ -82,82 +67,82 @@ Maj(u64 x, u64 y, u64 z) } static inline u64 -Sum0(u64 x) +sum0(u64 x) { - return (ROTR (x, 28) ^ ROTR (x, 34) ^ ROTR (x, 39)); + return (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39)); } static inline u64 -Sum1 (u64 x) +sum1(u64 x) { - return (ROTR (x, 14) ^ ROTR (x, 18) ^ ROTR (x, 41)); + return (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41)); } static const u64 k[] = { - UINT64_C(0x428a2f98d728ae22), UINT64_C(0x7137449123ef65cd), - UINT64_C(0xb5c0fbcfec4d3b2f), UINT64_C(0xe9b5dba58189dbbc), - UINT64_C(0x3956c25bf348b538), UINT64_C(0x59f111f1b605d019), - UINT64_C(0x923f82a4af194f9b), UINT64_C(0xab1c5ed5da6d8118), - UINT64_C(0xd807aa98a3030242), UINT64_C(0x12835b0145706fbe), - UINT64_C(0x243185be4ee4b28c), UINT64_C(0x550c7dc3d5ffb4e2), - UINT64_C(0x72be5d74f27b896f), UINT64_C(0x80deb1fe3b1696b1), - UINT64_C(0x9bdc06a725c71235), UINT64_C(0xc19bf174cf692694), - UINT64_C(0xe49b69c19ef14ad2), UINT64_C(0xefbe4786384f25e3), - UINT64_C(0x0fc19dc68b8cd5b5), UINT64_C(0x240ca1cc77ac9c65), - UINT64_C(0x2de92c6f592b0275), UINT64_C(0x4a7484aa6ea6e483), - UINT64_C(0x5cb0a9dcbd41fbd4), UINT64_C(0x76f988da831153b5), - UINT64_C(0x983e5152ee66dfab), UINT64_C(0xa831c66d2db43210), - UINT64_C(0xb00327c898fb213f), UINT64_C(0xbf597fc7beef0ee4), - UINT64_C(0xc6e00bf33da88fc2), UINT64_C(0xd5a79147930aa725), - UINT64_C(0x06ca6351e003826f), UINT64_C(0x142929670a0e6e70), - UINT64_C(0x27b70a8546d22ffc), UINT64_C(0x2e1b21385c26c926), - UINT64_C(0x4d2c6dfc5ac42aed), UINT64_C(0x53380d139d95b3df), - UINT64_C(0x650a73548baf63de), UINT64_C(0x766a0abb3c77b2a8), - UINT64_C(0x81c2c92e47edaee6), UINT64_C(0x92722c851482353b), - UINT64_C(0xa2bfe8a14cf10364), UINT64_C(0xa81a664bbc423001), - UINT64_C(0xc24b8b70d0f89791), UINT64_C(0xc76c51a30654be30), - UINT64_C(0xd192e819d6ef5218), UINT64_C(0xd69906245565a910), - UINT64_C(0xf40e35855771202a), UINT64_C(0x106aa07032bbd1b8), - UINT64_C(0x19a4c116b8d2d0c8), UINT64_C(0x1e376c085141ab53), - UINT64_C(0x2748774cdf8eeb99), UINT64_C(0x34b0bcb5e19b48a8), - UINT64_C(0x391c0cb3c5c95a63), UINT64_C(0x4ed8aa4ae3418acb), - UINT64_C(0x5b9cca4f7763e373), UINT64_C(0x682e6ff3d6b2b8a3), - UINT64_C(0x748f82ee5defb2fc), UINT64_C(0x78a5636f43172f60), - UINT64_C(0x84c87814a1f0ab72), UINT64_C(0x8cc702081a6439ec), - UINT64_C(0x90befffa23631e28), UINT64_C(0xa4506cebde82bde9), - UINT64_C(0xbef9a3f7b2c67915), UINT64_C(0xc67178f2e372532b), - UINT64_C(0xca273eceea26619c), UINT64_C(0xd186b8c721c0c207), - UINT64_C(0xeada7dd6cde0eb1e), UINT64_C(0xf57d4f7fee6ed178), - UINT64_C(0x06f067aa72176fba), UINT64_C(0x0a637dc5a2c898a6), - UINT64_C(0x113f9804bef90dae), UINT64_C(0x1b710b35131c471b), - UINT64_C(0x28db77f523047d84), UINT64_C(0x32caab7b40c72493), - UINT64_C(0x3c9ebe0a15c9bebc), UINT64_C(0x431d67c49c100d4c), - UINT64_C(0x4cc5d4becb3e42b6), UINT64_C(0x597f299cfc657e2a), - UINT64_C(0x5fcb6fab3ad6faec), UINT64_C(0x6c44198c4a475817) + U64(0x428a2f98d728ae22), U64(0x7137449123ef65cd), + U64(0xb5c0fbcfec4d3b2f), U64(0xe9b5dba58189dbbc), + U64(0x3956c25bf348b538), U64(0x59f111f1b605d019), + U64(0x923f82a4af194f9b), U64(0xab1c5ed5da6d8118), + U64(0xd807aa98a3030242), U64(0x12835b0145706fbe), + U64(0x243185be4ee4b28c), U64(0x550c7dc3d5ffb4e2), + U64(0x72be5d74f27b896f), U64(0x80deb1fe3b1696b1), + U64(0x9bdc06a725c71235), U64(0xc19bf174cf692694), + U64(0xe49b69c19ef14ad2), U64(0xefbe4786384f25e3), + U64(0x0fc19dc68b8cd5b5), U64(0x240ca1cc77ac9c65), + U64(0x2de92c6f592b0275), U64(0x4a7484aa6ea6e483), + U64(0x5cb0a9dcbd41fbd4), U64(0x76f988da831153b5), + U64(0x983e5152ee66dfab), U64(0xa831c66d2db43210), + U64(0xb00327c898fb213f), U64(0xbf597fc7beef0ee4), + U64(0xc6e00bf33da88fc2), U64(0xd5a79147930aa725), + U64(0x06ca6351e003826f), U64(0x142929670a0e6e70), + U64(0x27b70a8546d22ffc), U64(0x2e1b21385c26c926), + U64(0x4d2c6dfc5ac42aed), U64(0x53380d139d95b3df), + U64(0x650a73548baf63de), U64(0x766a0abb3c77b2a8), + U64(0x81c2c92e47edaee6), U64(0x92722c851482353b), + U64(0xa2bfe8a14cf10364), U64(0xa81a664bbc423001), + U64(0xc24b8b70d0f89791), U64(0xc76c51a30654be30), + U64(0xd192e819d6ef5218), U64(0xd69906245565a910), + U64(0xf40e35855771202a), U64(0x106aa07032bbd1b8), + U64(0x19a4c116b8d2d0c8), U64(0x1e376c085141ab53), + U64(0x2748774cdf8eeb99), U64(0x34b0bcb5e19b48a8), + U64(0x391c0cb3c5c95a63), U64(0x4ed8aa4ae3418acb), + U64(0x5b9cca4f7763e373), U64(0x682e6ff3d6b2b8a3), + U64(0x748f82ee5defb2fc), U64(0x78a5636f43172f60), + U64(0x84c87814a1f0ab72), U64(0x8cc702081a6439ec), + U64(0x90befffa23631e28), U64(0xa4506cebde82bde9), + U64(0xbef9a3f7b2c67915), U64(0xc67178f2e372532b), + U64(0xca273eceea26619c), U64(0xd186b8c721c0c207), + U64(0xeada7dd6cde0eb1e), U64(0xf57d4f7fee6ed178), + U64(0x06f067aa72176fba), U64(0x0a637dc5a2c898a6), + U64(0x113f9804bef90dae), U64(0x1b710b35131c471b), + U64(0x28db77f523047d84), U64(0x32caab7b40c72493), + U64(0x3c9ebe0a15c9bebc), U64(0x431d67c49c100d4c), + U64(0x4cc5d4becb3e42b6), U64(0x597f299cfc657e2a), + U64(0x5fcb6fab3ad6faec), U64(0x6c44198c4a475817) }; /* * Transform the message W which consists of 16 64-bit-words */ static uint -sha512_transform_block(struct sha512_state *hd, const byte *data) +sha512_transform(struct sha512_context *ctx, const byte *data) { u64 a, b, c, d, e, f, g, h; u64 w[16]; - int t; + uint t; /* get values from the chaining vars */ - a = hd->h0; - b = hd->h1; - c = hd->h2; - d = hd->h3; - e = hd->h4; - f = hd->h5; - g = hd->h6; - h = hd->h7; - - for ( t = 0; t < 16; t++ ) + a = ctx->h0; + b = ctx->h1; + c = ctx->h2; + d = ctx->h3; + e = ctx->h4; + f = ctx->h5; + g = ctx->h6; + h = ctx->h7; + + for (t = 0; t < 16; t++) w[t] = get_u64(data + t * 8); #define S0(x) (ROTR((x),1) ^ ROTR((x),8) ^ ((x)>>7)) @@ -175,10 +160,10 @@ sha512_transform_block(struct sha512_state *hd, const byte *data) Unrolled with macros: 350ms Unrolled with inline: 330ms */ -#if 0 /* Not unrolled. */ - t1 = h + Sum1 (e) + Ch(e, f, g) + k[t] + w[t%16]; - w[t%16] += S1 (w[(t - 2)%16]) + w[(t - 7)%16] + S0 (w[(t - 15)%16]); - t2 = Sum0 (a) + Maj(a, b, c); +#ifndef SHA512_UNROLLED + t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[t%16]; + w[t%16] += S1(w[(t - 2)%16]) + w[(t - 7)%16] + S0(w[(t - 15)%16]); + t2 = sum0(a) + Maj(a, b, c); h = g; g = f; f = e; @@ -188,100 +173,100 @@ sha512_transform_block(struct sha512_state *hd, const byte *data) b = a; a = t1 + t2; t++; -#else /* Unrolled to interweave the chain variables. */ - t1 = h + Sum1 (e) + Ch(e, f, g) + k[t] + w[0]; - w[0] += S1 (w[14]) + w[9] + S0 (w[1]); - t2 = Sum0 (a) + Maj(a, b, c); +#else /* Unrolled */ + t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[0]; + w[0] += S1(w[14]) + w[9] + S0(w[1]); + t2 = sum0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + Sum1 (d) + Ch(d, e, f) + k[t+1] + w[1]; - w[1] += S1 (w[15]) + w[10] + S0 (w[2]); - t2 = Sum0 (h) + Maj(h, a, b); + t1 = g + sum1(d) + Ch(d, e, f) + k[t+1] + w[1]; + w[1] += S1(w[15]) + w[10] + S0(w[2]); + t2 = sum0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + Sum1 (c) + Ch(c, d, e) + k[t+2] + w[2]; - w[2] += S1 (w[0]) + w[11] + S0 (w[3]); - t2 = Sum0 (g) + Maj(g, h, a); + t1 = f + sum1(c) + Ch(c, d, e) + k[t+2] + w[2]; + w[2] += S1(w[0]) + w[11] + S0(w[3]); + t2 = sum0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + Sum1 (b) + Ch(b, c, d) + k[t+3] + w[3]; - w[3] += S1 (w[1]) + w[12] + S0 (w[4]); - t2 = Sum0 (f) + Maj(f, g, h); + t1 = e + sum1(b) + Ch(b, c, d) + k[t+3] + w[3]; + w[3] += S1(w[1]) + w[12] + S0(w[4]); + t2 = sum0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + Sum1 (a) + Ch(a, b, c) + k[t+4] + w[4]; - w[4] += S1 (w[2]) + w[13] + S0 (w[5]); - t2 = Sum0 (e) + Maj(e, f, g); + t1 = d + sum1(a) + Ch(a, b, c) + k[t+4] + w[4]; + w[4] += S1(w[2]) + w[13] + S0(w[5]); + t2 = sum0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + Sum1 (h) + Ch(h, a, b) + k[t+5] + w[5]; - w[5] += S1 (w[3]) + w[14] + S0 (w[6]); - t2 = Sum0 (d) + Maj(d, e, f); + t1 = c + sum1(h) + Ch(h, a, b) + k[t+5] + w[5]; + w[5] += S1(w[3]) + w[14] + S0(w[6]); + t2 = sum0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + Sum1 (g) + Ch(g, h, a) + k[t+6] + w[6]; - w[6] += S1 (w[4]) + w[15] + S0 (w[7]); - t2 = Sum0 (c) + Maj(c, d, e); + t1 = b + sum1(g) + Ch(g, h, a) + k[t+6] + w[6]; + w[6] += S1(w[4]) + w[15] + S0(w[7]); + t2 = sum0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + Sum1 (f) + Ch(f, g, h) + k[t+7] + w[7]; - w[7] += S1 (w[5]) + w[0] + S0 (w[8]); - t2 = Sum0 (b) + Maj(b, c, d); + t1 = a + sum1(f) + Ch(f, g, h) + k[t+7] + w[7]; + w[7] += S1(w[5]) + w[0] + S0(w[8]); + t2 = sum0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - t1 = h + Sum1 (e) + Ch(e, f, g) + k[t+8] + w[8]; - w[8] += S1 (w[6]) + w[1] + S0 (w[9]); - t2 = Sum0 (a) + Maj(a, b, c); + t1 = h + sum1(e) + Ch(e, f, g) + k[t+8] + w[8]; + w[8] += S1(w[6]) + w[1] + S0(w[9]); + t2 = sum0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + Sum1 (d) + Ch(d, e, f) + k[t+9] + w[9]; - w[9] += S1 (w[7]) + w[2] + S0 (w[10]); - t2 = Sum0 (h) + Maj(h, a, b); + t1 = g + sum1(d) + Ch(d, e, f) + k[t+9] + w[9]; + w[9] += S1(w[7]) + w[2] + S0(w[10]); + t2 = sum0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + Sum1 (c) + Ch(c, d, e) + k[t+10] + w[10]; - w[10] += S1 (w[8]) + w[3] + S0 (w[11]); - t2 = Sum0 (g) + Maj(g, h, a); + t1 = f + sum1(c) + Ch(c, d, e) + k[t+10] + w[10]; + w[10] += S1(w[8]) + w[3] + S0(w[11]); + t2 = sum0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + Sum1 (b) + Ch(b, c, d) + k[t+11] + w[11]; - w[11] += S1 (w[9]) + w[4] + S0 (w[12]); - t2 = Sum0 (f) + Maj(f, g, h); + t1 = e + sum1(b) + Ch(b, c, d) + k[t+11] + w[11]; + w[11] += S1(w[9]) + w[4] + S0(w[12]); + t2 = sum0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + Sum1 (a) + Ch(a, b, c) + k[t+12] + w[12]; - w[12] += S1 (w[10]) + w[5] + S0 (w[13]); - t2 = Sum0 (e) + Maj(e, f, g); + t1 = d + sum1(a) + Ch(a, b, c) + k[t+12] + w[12]; + w[12] += S1(w[10]) + w[5] + S0(w[13]); + t2 = sum0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + Sum1 (h) + Ch(h, a, b) + k[t+13] + w[13]; - w[13] += S1 (w[11]) + w[6] + S0 (w[14]); - t2 = Sum0 (d) + Maj(d, e, f); + t1 = c + sum1(h) + Ch(h, a, b) + k[t+13] + w[13]; + w[13] += S1(w[11]) + w[6] + S0(w[14]); + t2 = sum0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + Sum1 (g) + Ch(g, h, a) + k[t+14] + w[14]; - w[14] += S1 (w[12]) + w[7] + S0 (w[15]); - t2 = Sum0 (c) + Maj(c, d, e); + t1 = b + sum1(g) + Ch(g, h, a) + k[t+14] + w[14]; + w[14] += S1(w[12]) + w[7] + S0(w[15]); + t2 = sum0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + Sum1 (f) + Ch(f, g, h) + k[t+15] + w[15]; - w[15] += S1 (w[13]) + w[8] + S0 (w[0]); - t2 = Sum0 (b) + Maj(b, c, d); + t1 = a + sum1(f) + Ch(f, g, h) + k[t+15] + w[15]; + w[15] += S1(w[13]) + w[8] + S0(w[0]); + t2 = sum0(b) + Maj(b, c, d); e += t1; a = t1 + t2; @@ -293,9 +278,9 @@ sha512_transform_block(struct sha512_state *hd, const byte *data) { u64 t1, t2; -#if 0 /* Not unrolled. */ - t1 = h + Sum1 (e) + Ch(e, f, g) + k[t] + w[t%16]; - t2 = Sum0 (a) + Maj(a, b, c); +#ifndef SHA512_UNROLLED + t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[t%16]; + t2 = sum0(a) + Maj(a, b, c); h = g; g = f; f = e; @@ -305,84 +290,84 @@ sha512_transform_block(struct sha512_state *hd, const byte *data) b = a; a = t1 + t2; t++; -#else /* Unrolled to interweave the chain variables. */ - t1 = h + Sum1 (e) + Ch(e, f, g) + k[t] + w[0]; - t2 = Sum0 (a) + Maj(a, b, c); +#else /* Unrolled */ + t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[0]; + t2 = sum0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + Sum1 (d) + Ch(d, e, f) + k[t+1] + w[1]; - t2 = Sum0 (h) + Maj(h, a, b); + t1 = g + sum1(d) + Ch(d, e, f) + k[t+1] + w[1]; + t2 = sum0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + Sum1 (c) + Ch(c, d, e) + k[t+2] + w[2]; - t2 = Sum0 (g) + Maj(g, h, a); + t1 = f + sum1(c) + Ch(c, d, e) + k[t+2] + w[2]; + t2 = sum0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + Sum1 (b) + Ch(b, c, d) + k[t+3] + w[3]; - t2 = Sum0 (f) + Maj(f, g, h); + t1 = e + sum1(b) + Ch(b, c, d) + k[t+3] + w[3]; + t2 = sum0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + Sum1 (a) + Ch(a, b, c) + k[t+4] + w[4]; - t2 = Sum0 (e) + Maj(e, f, g); + t1 = d + sum1(a) + Ch(a, b, c) + k[t+4] + w[4]; + t2 = sum0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + Sum1 (h) + Ch(h, a, b) + k[t+5] + w[5]; - t2 = Sum0 (d) + Maj(d, e, f); + t1 = c + sum1(h) + Ch(h, a, b) + k[t+5] + w[5]; + t2 = sum0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + Sum1 (g) + Ch(g, h, a) + k[t+6] + w[6]; - t2 = Sum0 (c) + Maj(c, d, e); + t1 = b + sum1(g) + Ch(g, h, a) + k[t+6] + w[6]; + t2 = sum0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + Sum1 (f) + Ch(f, g, h) + k[t+7] + w[7]; - t2 = Sum0 (b) + Maj(b, c, d); + t1 = a + sum1(f) + Ch(f, g, h) + k[t+7] + w[7]; + t2 = sum0(b) + Maj(b, c, d); e += t1; a = t1 + t2; - t1 = h + Sum1 (e) + Ch(e, f, g) + k[t+8] + w[8]; - t2 = Sum0 (a) + Maj(a, b, c); + t1 = h + sum1(e) + Ch(e, f, g) + k[t+8] + w[8]; + t2 = sum0(a) + Maj(a, b, c); d += t1; h = t1 + t2; - t1 = g + Sum1 (d) + Ch(d, e, f) + k[t+9] + w[9]; - t2 = Sum0 (h) + Maj(h, a, b); + t1 = g + sum1(d) + Ch(d, e, f) + k[t+9] + w[9]; + t2 = sum0(h) + Maj(h, a, b); c += t1; g = t1 + t2; - t1 = f + Sum1 (c) + Ch(c, d, e) + k[t+10] + w[10]; - t2 = Sum0 (g) + Maj(g, h, a); + t1 = f + sum1(c) + Ch(c, d, e) + k[t+10] + w[10]; + t2 = sum0(g) + Maj(g, h, a); b += t1; f = t1 + t2; - t1 = e + Sum1 (b) + Ch(b, c, d) + k[t+11] + w[11]; - t2 = Sum0 (f) + Maj(f, g, h); + t1 = e + sum1(b) + Ch(b, c, d) + k[t+11] + w[11]; + t2 = sum0(f) + Maj(f, g, h); a += t1; e = t1 + t2; - t1 = d + Sum1 (a) + Ch(a, b, c) + k[t+12] + w[12]; - t2 = Sum0 (e) + Maj(e, f, g); + t1 = d + sum1(a) + Ch(a, b, c) + k[t+12] + w[12]; + t2 = sum0(e) + Maj(e, f, g); h += t1; d = t1 + t2; - t1 = c + Sum1 (h) + Ch(h, a, b) + k[t+13] + w[13]; - t2 = Sum0 (d) + Maj(d, e, f); + t1 = c + sum1(h) + Ch(h, a, b) + k[t+13] + w[13]; + t2 = sum0(d) + Maj(d, e, f); g += t1; c = t1 + t2; - t1 = b + Sum1 (g) + Ch(g, h, a) + k[t+14] + w[14]; - t2 = Sum0 (c) + Maj(c, d, e); + t1 = b + sum1(g) + Ch(g, h, a) + k[t+14] + w[14]; + t2 = sum0(c) + Maj(c, d, e); f += t1; b = t1 + t2; - t1 = a + Sum1 (f) + Ch(f, g, h) + k[t+15] + w[15]; - t2 = Sum0 (b) + Maj(b, c, d); + t1 = a + sum1(f) + Ch(f, g, h) + k[t+15] + w[15]; + t2 = sum0(b) + Maj(b, c, d); e += t1; a = t1 + t2; @@ -391,61 +376,77 @@ sha512_transform_block(struct sha512_state *hd, const byte *data) } /* Update chaining vars. */ - hd->h0 += a; - hd->h1 += b; - hd->h2 += c; - hd->h3 += d; - hd->h4 += e; - hd->h5 += f; - hd->h6 += g; - hd->h7 += h; + ctx->h0 += a; + ctx->h1 += b; + ctx->h2 += c; + ctx->h3 += d; + ctx->h4 += e; + ctx->h5 += f; + ctx->h6 += g; + ctx->h7 += h; return /* burn_stack */ (8 + 16) * sizeof(u64) + sizeof(u32) + 3 * sizeof(void*); } -static uint -sha512_transform(void *context, const byte *data, size_t nblks) +void +sha512_update(struct sha512_context *ctx, const byte *buf, size_t len) { - struct sha512_context *ctx = context; - uint burn; + if (ctx->count) + { + /* Fill rest of internal buffer */ + for (; len && ctx->count < SHA512_BLOCK_SIZE; len--) + ctx->buf[ctx->count++] = *buf++; + + if (ctx->count < SHA512_BLOCK_SIZE) + return; + + /* Process data from internal buffer */ + sha512_transform(ctx, ctx->buf); + ctx->nblocks++; + ctx->count = 0; + } - do + if (!len) + return; + + /* Process data from input buffer */ + while (len >= SHA512_BLOCK_SIZE) { - burn = sha512_transform_block(&ctx->state, data) + 3 * sizeof(void*); - data += 128; + sha512_transform(ctx, buf); + ctx->nblocks++; + buf += SHA512_BLOCK_SIZE; + len -= SHA512_BLOCK_SIZE; } - while(--nblks); - return burn; + /* Copy remaining data to internal buffer */ + memcpy(ctx->buf, buf, len); + ctx->count = len; } -/* The routine final terminates the computation and - * returns the digest. - * The handle is prepared for a new cycle, but adding bytes to the - * handle will the destroy the returned buffer. - * Returns: 64 bytes representing the digest. When used for sha384, - * we take the leftmost 48 of those bytes. +/* + * The routine final terminates the computation and returns the digest. The + * handle is prepared for a new cycle, but adding bytes to the handle will the + * destroy the returned buffer. + * + * Returns: 64 bytes representing the digest. When used for sha384, we take the + * first 48 of those bytes. */ byte * sha512_final(struct sha512_context *ctx) { u64 t, th, msb, lsb; - byte *p; - sha256_update(&ctx->bctx, NULL, 0); /* flush */ ; + sha512_update(ctx, NULL, 0); /* flush */ - t = ctx->bctx.nblocks; - /* if (sizeof t == sizeof ctx->bctx.nblocks) */ - th = ctx->bctx.nblocks_high; - /* else */ - /* th = ctx->bctx.nblocks >> 64; In case we ever use u128 */ + t = ctx->nblocks; + th = 0; /* multiply by 128 to make a byte count */ lsb = t << 7; msb = (th << 7) | (t >> 57); /* add the count */ t = lsb; - if ((lsb += ctx->bctx.count) < t) + if ((lsb += ctx->count) < t) msb++; /* multiply by 8 to make a bit count */ t = lsb; @@ -453,55 +454,56 @@ sha512_final(struct sha512_context *ctx) msb <<= 3; msb |= t >> 61; - if (ctx->bctx.count < 112) - { /* enough room */ - ctx->bctx.buf[ctx->bctx.count++] = 0x80; /* pad */ - while(ctx->bctx.count < 112) - ctx->bctx.buf[ctx->bctx.count++] = 0; /* pad */ + if (ctx->count < 112) + { + /* enough room */ + ctx->buf[ctx->count++] = 0x80; /* pad */ + while(ctx->count < 112) + ctx->buf[ctx->count++] = 0; /* pad */ } else - { /* need one extra block */ - ctx->bctx.buf[ctx->bctx.count++] = 0x80; /* pad character */ - while(ctx->bctx.count < 128) - ctx->bctx.buf[ctx->bctx.count++] = 0; - sha256_update(&ctx->bctx, NULL, 0); /* flush */ ; - memset(ctx->bctx.buf, 0, 112); /* fill next block with zeroes */ + { + /* need one extra block */ + ctx->buf[ctx->count++] = 0x80; /* pad character */ + while(ctx->count < 128) + ctx->buf[ctx->count++] = 0; + sha512_update(ctx, NULL, 0); /* flush */ + memset(ctx->buf, 0, 112); /* fill next block with zeroes */ } + /* append the 128 bit count */ - put_u64(ctx->bctx.buf + 112, msb); - put_u64(ctx->bctx.buf + 120, lsb); - sha512_transform(ctx, ctx->bctx.buf, 1); - - p = ctx->bctx.buf; -#define X(a) do { put_u64(p, ctx->state.h##a); p += 8; } while(0) - X (0); - X (1); - X (2); - X (3); - X (4); - X (5); - /* Note that these last two chunks are included even for SHA384. - We just ignore them. */ - X (6); - X (7); + put_u64(ctx->buf + 112, msb); + put_u64(ctx->buf + 120, lsb); + sha512_transform(ctx, ctx->buf); + + byte *p = ctx->buf; +#define X(a) do { put_u64(p, ctx->h##a); p += 8; } while(0) + X(0); + X(1); + X(2); + X(3); + X(4); + X(5); + X(6); + X(7); #undef X - return ctx->bctx.buf; + return ctx->buf; } /* - * SHA512-HMAC + * SHA512-HMAC */ static void sha512_hash_buffer(byte *outbuf, const byte *buffer, size_t length) { - struct sha512_context hd_tmp; + struct sha512_context ctx; - sha512_init(&hd_tmp); - sha512_update(&hd_tmp, buffer, length); - memcpy(outbuf, sha512_final(&hd_tmp), SHA512_SIZE); + sha512_init(&ctx); + sha512_update(&ctx, buffer, length); + memcpy(outbuf, sha512_final(&ctx), SHA512_SIZE); } void @@ -513,12 +515,12 @@ sha512_hmac_init(struct sha512_hmac_context *ctx, const byte *key, size_t keylen if (keylen <= SHA512_BLOCK_SIZE) { memcpy(keybuf, key, keylen); - bzero(keybuf + keylen, SHA512_BLOCK_SIZE - keylen); + memset(keybuf + keylen, 0, SHA512_BLOCK_SIZE - keylen); } else { sha512_hash_buffer(keybuf, key, keylen); - bzero(keybuf + SHA512_SIZE, SHA512_BLOCK_SIZE - SHA512_SIZE); + memset(keybuf + SHA512_SIZE, 0, SHA512_BLOCK_SIZE - SHA512_SIZE); } /* Initialize the inner digest */ @@ -535,13 +537,15 @@ sha512_hmac_init(struct sha512_hmac_context *ctx, const byte *key, size_t keylen sha512_update(&ctx->octx, buf, SHA512_BLOCK_SIZE); } -void sha512_hmac_update(struct sha512_hmac_context *ctx, const byte *buf, size_t buflen) +void +sha512_hmac_update(struct sha512_hmac_context *ctx, const byte *buf, size_t buflen) { /* Just update the inner digest */ sha512_update(&ctx->ictx, buf, buflen); } -byte *sha512_hmac_final(struct sha512_hmac_context *ctx) +byte * +sha512_hmac_final(struct sha512_hmac_context *ctx) { /* Finish the inner digest */ byte *isha = sha512_final(&ctx->ictx); @@ -553,17 +557,17 @@ byte *sha512_hmac_final(struct sha512_hmac_context *ctx) /* - * SHA384-HMAC + * SHA384-HMAC */ static void sha384_hash_buffer(byte *outbuf, const byte *buffer, size_t length) { - struct sha384_context hd_tmp; + struct sha384_context ctx; - sha384_init(&hd_tmp); - sha384_update(&hd_tmp, buffer, length); - memcpy(outbuf, sha384_final(&hd_tmp), SHA384_SIZE); + sha384_init(&ctx); + sha384_update(&ctx, buffer, length); + memcpy(outbuf, sha384_final(&ctx), SHA384_SIZE); } void @@ -575,12 +579,12 @@ sha384_hmac_init(struct sha384_hmac_context *ctx, const byte *key, size_t keylen if (keylen <= SHA384_BLOCK_SIZE) { memcpy(keybuf, key, keylen); - bzero(keybuf + keylen, SHA384_BLOCK_SIZE - keylen); + memset(keybuf + keylen, 0, SHA384_BLOCK_SIZE - keylen); } else { sha384_hash_buffer(keybuf, key, keylen); - bzero(keybuf + SHA384_SIZE, SHA384_BLOCK_SIZE - SHA384_SIZE); + memset(keybuf + SHA384_SIZE, 0, SHA384_BLOCK_SIZE - SHA384_SIZE); } /* Initialize the inner digest */ @@ -597,13 +601,15 @@ sha384_hmac_init(struct sha384_hmac_context *ctx, const byte *key, size_t keylen sha384_update(&ctx->octx, buf, SHA384_BLOCK_SIZE); } -void sha384_hmac_update(struct sha384_hmac_context *ctx, const byte *buf, size_t buflen) +void +sha384_hmac_update(struct sha384_hmac_context *ctx, const byte *buf, size_t buflen) { /* Just update the inner digest */ sha384_update(&ctx->ictx, buf, buflen); } -byte *sha384_hmac_final(struct sha384_hmac_context *ctx) +byte * +sha384_hmac_final(struct sha384_hmac_context *ctx) { /* Finish the inner digest */ byte *isha = sha384_final(&ctx->ictx); diff --git a/lib/sha512.h b/lib/sha512.h index bd998152..1614a3ac 100644 --- a/lib/sha512.h +++ b/lib/sha512.h @@ -13,7 +13,8 @@ #ifndef _BIRD_SHA512_H_ #define _BIRD_SHA512_H_ -#include "lib/sha256.h" +#include "nest/bird.h" + #define SHA384_SIZE 48 #define SHA384_HEX_SIZE 97 @@ -23,43 +24,41 @@ #define SHA512_HEX_SIZE 129 #define SHA512_BLOCK_SIZE 128 -struct sha512_state -{ + +struct sha512_context { u64 h0, h1, h2, h3, h4, h5, h6, h7; + byte buf[SHA512_BLOCK_SIZE]; + uint nblocks; + uint count; }; -struct sha512_context -{ - struct sha256_context bctx; - struct sha512_state state; -}; -#define sha384_context sha512_context /* aliasing 'struct sha384_context' to 'struct sha512_context' */ +#define sha384_context sha512_context void sha512_init(struct sha512_context *ctx); void sha384_init(struct sha384_context *ctx); -void sha512_update(struct sha512_context *ctx, const byte *in_buf, size_t in_len); -static inline void sha384_update(struct sha384_context *ctx, const byte *in_buf, size_t in_len) -{ - sha512_update(ctx, in_buf, in_len); -} +void sha512_update(struct sha512_context *ctx, const byte *buf, size_t len); +static inline void sha384_update(struct sha384_context *ctx, const byte *buf, size_t len) +{ sha512_update(ctx, buf, len); } + +byte *sha512_final(struct sha512_context *ctx); +static inline byte *sha384_final(struct sha384_context *ctx) +{ return sha512_final(ctx); } -byte* sha512_final(struct sha512_context *ctx); -static inline byte* sha384_final(struct sha384_context *ctx) -{ - return sha512_final(ctx); -} /* * HMAC-SHA512, HMAC-SHA384 */ + struct sha512_hmac_context { struct sha512_context ictx; struct sha512_context octx; -} ; -#define sha384_hmac_context sha512_hmac_context /* aliasing 'struct sha384_hmac_context' to 'struct sha384_hmac_context' */ +}; + +#define sha384_hmac_context sha512_hmac_context + void sha512_hmac_init(struct sha512_hmac_context *ctx, const byte *key, size_t keylen); void sha384_hmac_init(struct sha384_hmac_context *ctx, const byte *key, size_t keylen); @@ -70,4 +69,5 @@ void sha384_hmac_update(struct sha384_hmac_context *ctx, const byte *buf, size_t byte *sha512_hmac_final(struct sha512_hmac_context *ctx); byte *sha384_hmac_final(struct sha384_hmac_context *ctx); + #endif /* _BIRD_SHA512_H_ */ -- cgit v1.2.3