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authorMaurus Cuelenaere <mcuelenaere@gmail.com>2008-04-09 16:29:05 +0000
committerMaurus Cuelenaere <mcuelenaere@gmail.com>2008-04-09 16:29:05 +0000
commit49236bb62bedc07221de0b04005809d63f03f9ee (patch)
tree598db82232180437b82c7dfab13199bbaff35c52 /tools
parentab796a2e4981f159fdbc86e8c2d3f5c86cf978a4 (diff)
downloadrockbox-49236bb62bedc07221de0b04005809d63f03f9ee.tar.gz
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rockbox-49236bb62bedc07221de0b04005809d63f03f9ee.zip
Change HMAC-SHA1 implementation to the one taken from gnulib, which
contains a more clear copyright notice. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17054 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'tools')
-rw-r--r--tools/creative.c4
-rw-r--r--tools/hmac-sha1.c827
-rw-r--r--tools/hmac-sha1.h174
3 files changed, 557 insertions, 448 deletions
diff --git a/tools/creative.c b/tools/creative.c
index 5b8f15abc0..b9041ca513 100644
--- a/tools/creative.c
+++ b/tools/creative.c
@@ -68,8 +68,8 @@ static int make_ciff_file(unsigned char *inbuf, int length,
memcpy(&outbuf[0x98+length], "LLUN", 4);
int2le(20, &outbuf[0x98+length+4]);
/* Do checksum */
- hmac_sha((unsigned char *)devices[device].null, strlen(devices[device].null),
- outbuf, 0x98+length, key, 20);
+ hmac_sha1((unsigned char *)devices[device].null, strlen(devices[device].null),
+ outbuf, 0x98+length, key);
memcpy(&outbuf[0x98+length+8], key, 20);
return length+0x90+0x1C+8;
}
diff --git a/tools/hmac-sha1.c b/tools/hmac-sha1.c
index 8882b10b9a..d036a45a86 100644
--- a/tools/hmac-sha1.c
+++ b/tools/hmac-sha1.c
@@ -1,453 +1,516 @@
-/*
- * sha1.c
- *
- * Description:
- * This file implements the Secure Hashing Algorithm 1 as
- * defined in FIPS PUB 180-1 published April 17, 1995.
- *
- * The SHA-1, produces a 160-bit message digest for a given
- * data stream. It should take about 2**n steps to find a
- * message with the same digest as a given message and
- * 2**(n/2) to find any two messages with the same digest,
- * when n is the digest size in bits. Therefore, this
- * algorithm can serve as a means of providing a
- * "fingerprint" for a message.
- *
- * Portability Issues:
- * SHA-1 is defined in terms of 32-bit "words". This code
- * uses <stdint.h> (included via "sha1.h" to define 32 and 8
- * bit unsigned integer types. If your C compiler does not
- * support 32 bit unsigned integers, this code is not
- * appropriate.
- *
- * Caveats:
- * SHA-1 is designed to work with messages less than 2^64 bits
- * long. Although SHA-1 allows a message digest to be generated
- * for messages of any number of bits less than 2^64, this
- * implementation only works with messages with a length that is
- * a multiple of the size of an 8-bit character.
- *
- */
+/* sha1.c - Functions to compute SHA1 message digest of files or
+ memory blocks according to the NIST specification FIPS-180-1.
-#include <string.h>
+ Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006 Free Software
+ Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/* Written by Scott G. Miller
+ Credits:
+ Robert Klep <robert@ilse.nl> -- Expansion function fix
+*/
#include "hmac-sha1.h"
-/*
- * Define the SHA1 circular left shift macro
- */
-#define SHA1CircularShift(bits,word) \
- (((word) << (bits)) | ((word) >> (32-(bits))))
-
-/* Local Function Prototyptes */
-void SHA1PadMessage(SHA1Context *);
-void SHA1ProcessMessageBlock(SHA1Context *);
-
-/*
- * SHA1Reset
- *
- * Description:
- * This function will initialize the SHA1Context in preparation
- * for computing a new SHA1 message digest.
- *
- * Parameters:
- * context: [in/out]
- * The context to reset.
- *
- * Returns:
- * sha Error Code.
- *
- */
-int SHA1Reset(SHA1Context *context)
-{
- if (!context)
- {
- return shaNull;
- }
+#include <stddef.h>
+#include <string.h>
- context->Length_Low = 0;
- context->Length_High = 0;
- context->Message_Block_Index = 0;
- context->Intermediate_Hash[0] = 0x67452301;
- context->Intermediate_Hash[1] = 0xEFCDAB89;
- context->Intermediate_Hash[2] = 0x98BADCFE;
- context->Intermediate_Hash[3] = 0x10325476;
- context->Intermediate_Hash[4] = 0xC3D2E1F0;
+#ifdef WORDS_BIGENDIAN
+# define SWAP(n) (n)
+#else
+# define SWAP(n) \
+ (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
+#endif
- context->Computed = 0;
- context->Corrupted = 0;
+#define BLOCKSIZE 4096
+#if BLOCKSIZE % 64 != 0
+# error "invalid BLOCKSIZE"
+#endif
- return shaSuccess;
+/* This array contains the bytes used to pad the buffer to the next
+ 64-byte boundary. (RFC 1321, 3.1: Step 1) */
+static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
+
+
+/* Take a pointer to a 160 bit block of data (five 32 bit ints) and
+ initialize it to the start constants of the SHA1 algorithm. This
+ must be called before using hash in the call to sha1_hash. */
+void
+sha1_init_ctx (struct sha1_ctx *ctx)
+{
+ ctx->A = 0x67452301;
+ ctx->B = 0xefcdab89;
+ ctx->C = 0x98badcfe;
+ ctx->D = 0x10325476;
+ ctx->E = 0xc3d2e1f0;
+
+ ctx->total[0] = ctx->total[1] = 0;
+ ctx->buflen = 0;
}
-/*
- * SHA1Result
- *
- * Description:
- * This function will return the 160-bit message digest into the
- * Message_Digest array provided by the caller.
- * NOTE: The first octet of hash is stored in the 0th element,
- * the last octet of hash in the 19th element.
- *
- * Parameters:
- * context: [in/out]
- * The context to use to calculate the SHA-1 hash.
- * Message_Digest: [out]
- * Where the digest is returned.
- *
- * Returns:
- * sha Error Code.
- *
- */
-int SHA1Result( SHA1Context *context,
- uint8_t Message_Digest[SHA1HashSize])
+/* Put result from CTX in first 20 bytes following RESBUF. The result
+ must be in little endian byte order.
+
+ IMPORTANT: On some systems it is required that RESBUF is correctly
+ aligned for a 32-bit value. */
+void *
+sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf)
{
- int i;
+ ((uint32_t *) resbuf)[0] = SWAP (ctx->A);
+ ((uint32_t *) resbuf)[1] = SWAP (ctx->B);
+ ((uint32_t *) resbuf)[2] = SWAP (ctx->C);
+ ((uint32_t *) resbuf)[3] = SWAP (ctx->D);
+ ((uint32_t *) resbuf)[4] = SWAP (ctx->E);
- if (!context || !Message_Digest)
- {
- return shaNull;
- }
+ return resbuf;
+}
- if (context->Corrupted)
- {
- return context->Corrupted;
- }
+/* Process the remaining bytes in the internal buffer and the usual
+ prolog according to the standard and write the result to RESBUF.
- if (!context->Computed)
- {
- SHA1PadMessage(context);
- for(i=0; i<64; ++i)
- {
- /* message may be sensitive, clear it out */
- context->Message_Block[i] = 0;
- }
- context->Length_Low = 0; /* and clear length */
- context->Length_High = 0;
- context->Computed = 1;
- }
+ IMPORTANT: On some systems it is required that RESBUF is correctly
+ aligned for a 32-bit value. */
+void *
+sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf)
+{
+ /* Take yet unprocessed bytes into account. */
+ uint32_t bytes = ctx->buflen;
+ size_t size = (bytes < 56) ? 64 / 4 : 64 * 2 / 4;
- for(i = 0; i < SHA1HashSize; ++i)
- {
- Message_Digest[i] = context->Intermediate_Hash[i>>2]
- >> 8 * ( 3 - ( i & 0x03 ) );
- }
+ /* Now count remaining bytes. */
+ ctx->total[0] += bytes;
+ if (ctx->total[0] < bytes)
+ ++ctx->total[1];
+
+ /* Put the 64-bit file length in *bits* at the end of the buffer. */
+ ctx->buffer[size - 2] = SWAP ((ctx->total[1] << 3) | (ctx->total[0] >> 29));
+ ctx->buffer[size - 1] = SWAP (ctx->total[0] << 3);
+
+ memcpy (&((char *) ctx->buffer)[bytes], fillbuf, (size - 2) * 4 - bytes);
+
+ /* Process last bytes. */
+ sha1_process_block (ctx->buffer, size * 4, ctx);
- return shaSuccess;
+ return sha1_read_ctx (ctx, resbuf);
}
-/*
- * SHA1Input
- *
- * Description:
- * This function accepts an array of octets as the next portion
- * of the message.
- *
- * Parameters:
- * context: [in/out]
- * The SHA context to update
- * message_array: [in]
- * An array of characters representing the next portion of
- * the message.
- * length: [in]
- * The length of the message in message_array
- *
- * Returns:
- * sha Error Code.
- *
- */
-int SHA1Input( SHA1Context *context,
- const uint8_t *message_array,
- unsigned length)
+/* Compute SHA1 message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 16 bytes
+ beginning at RESBLOCK. */
+int
+sha1_stream (FILE *stream, void *resblock)
{
- if (!length)
- {
- return shaSuccess;
- }
+ struct sha1_ctx ctx;
+ char buffer[BLOCKSIZE + 72];
+ size_t sum;
- if (!context || !message_array)
- {
- return shaNull;
- }
+ /* Initialize the computation context. */
+ sha1_init_ctx (&ctx);
- if (context->Computed)
+ /* Iterate over full file contents. */
+ while (1)
{
- context->Corrupted = shaStateError;
- return shaStateError;
+ /* We read the file in blocks of BLOCKSIZE bytes. One call of the
+ computation function processes the whole buffer so that with the
+ next round of the loop another block can be read. */
+ size_t n;
+ sum = 0;
+
+ /* Read block. Take care for partial reads. */
+ while (1)
+ {
+ n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
+
+ sum += n;
+
+ if (sum == BLOCKSIZE)
+ break;
+
+ if (n == 0)
+ {
+ /* Check for the error flag IFF N == 0, so that we don't
+ exit the loop after a partial read due to e.g., EAGAIN
+ or EWOULDBLOCK. */
+ if (ferror (stream))
+ return 1;
+ goto process_partial_block;
+ }
+
+ /* We've read at least one byte, so ignore errors. But always
+ check for EOF, since feof may be true even though N > 0.
+ Otherwise, we could end up calling fread after EOF. */
+ if (feof (stream))
+ goto process_partial_block;
+ }
+
+ /* Process buffer with BLOCKSIZE bytes. Note that
+ BLOCKSIZE % 64 == 0
+ */
+ sha1_process_block (buffer, BLOCKSIZE, &ctx);
}
- if (context->Corrupted)
- {
- return context->Corrupted;
- }
- while(length-- && !context->Corrupted)
- {
- context->Message_Block[context->Message_Block_Index++] =
- (*message_array & 0xFF);
-
- context->Length_Low += 8;
- if (context->Length_Low == 0)
- {
- context->Length_High++;
- if (context->Length_High == 0)
- {
- /* Message is too long */
- context->Corrupted = 1;
- }
- }
-
- if (context->Message_Block_Index == 64)
- {
- SHA1ProcessMessageBlock(context);
- }
-
- message_array++;
- }
+ process_partial_block:;
+
+ /* Process any remaining bytes. */
+ if (sum > 0)
+ sha1_process_bytes (buffer, sum, &ctx);
- return shaSuccess;
+ /* Construct result in desired memory. */
+ sha1_finish_ctx (&ctx, resblock);
+ return 0;
}
-/*
- * SHA1ProcessMessageBlock
- *
- * Description:
- * This function will process the next 512 bits of the message
- * stored in the Message_Block array.
- *
- * Parameters:
- * None.
- *
- * Returns:
- * Nothing.
- *
- * Comments:
- * Many of the variable names in this code, especially the
- * single character names, were used because those were the
- * names used in the publication.
- *
- *
- */
-void SHA1ProcessMessageBlock(SHA1Context *context)
+/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+void *
+sha1_buffer (const char *buffer, size_t len, void *resblock)
{
- const uint32_t K[] = { /* Constants defined in SHA-1 */
- 0x5A827999,
- 0x6ED9EBA1,
- 0x8F1BBCDC,
- 0xCA62C1D6
- };
- int t; /* Loop counter */
- uint32_t temp; /* Temporary word value */
- uint32_t W[80]; /* Word sequence */
- uint32_t A, B, C, D, E; /* Word buffers */
-
- /*
- * Initialize the first 16 words in the array W
- */
- for(t = 0; t < 16; t++)
- {
- W[t] = context->Message_Block[t * 4] << 24;
- W[t] |= context->Message_Block[t * 4 + 1] << 16;
- W[t] |= context->Message_Block[t * 4 + 2] << 8;
- W[t] |= context->Message_Block[t * 4 + 3];
- }
+ struct sha1_ctx ctx;
- for(t = 16; t < 80; t++)
- {
- W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
- }
+ /* Initialize the computation context. */
+ sha1_init_ctx (&ctx);
- A = context->Intermediate_Hash[0];
- B = context->Intermediate_Hash[1];
- C = context->Intermediate_Hash[2];
- D = context->Intermediate_Hash[3];
- E = context->Intermediate_Hash[4];
+ /* Process whole buffer but last len % 64 bytes. */
+ sha1_process_bytes (buffer, len, &ctx);
- for(t = 0; t < 20; t++)
- {
- temp = SHA1CircularShift(5,A) +
- ((B & C) | ((~B) & D)) + E + W[t] + K[0];
- E = D;
- D = C;
- C = SHA1CircularShift(30,B);
- B = A;
- A = temp;
- }
+ /* Put result in desired memory area. */
+ return sha1_finish_ctx (&ctx, resblock);
+}
- for(t = 20; t < 40; t++)
+void
+sha1_process_bytes (const void *buffer, size_t len, struct sha1_ctx *ctx)
+{
+ /* When we already have some bits in our internal buffer concatenate
+ both inputs first. */
+ if (ctx->buflen != 0)
{
- temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1];
- E = D;
- D = C;
- C = SHA1CircularShift(30,B);
- B = A;
- A = temp;
+ size_t left_over = ctx->buflen;
+ size_t add = 128 - left_over > len ? len : 128 - left_over;
+
+ memcpy (&((char *) ctx->buffer)[left_over], buffer, add);
+ ctx->buflen += add;
+
+ if (ctx->buflen > 64)
+ {
+ sha1_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
+
+ ctx->buflen &= 63;
+ /* The regions in the following copy operation cannot overlap. */
+ memcpy (ctx->buffer,
+ &((char *) ctx->buffer)[(left_over + add) & ~63],
+ ctx->buflen);
+ }
+
+ buffer = (const char *) buffer + add;
+ len -= add;
}
- for(t = 40; t < 60; t++)
+ /* Process available complete blocks. */
+ if (len >= 64)
{
- temp = SHA1CircularShift(5,A) +
- ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2];
- E = D;
- D = C;
- C = SHA1CircularShift(30,B);
- B = A;
- A = temp;
+#if !_STRING_ARCH_unaligned
+# define alignof(type) offsetof (struct { char c; type x; }, x)
+# define UNALIGNED_P(p) (((size_t) p) % alignof (uint32_t) != 0)
+ if (UNALIGNED_P (buffer))
+ while (len > 64)
+ {
+ sha1_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
+ buffer = (const char *) buffer + 64;
+ len -= 64;
+ }
+ else
+#endif
+ {
+ sha1_process_block (buffer, len & ~63, ctx);
+ buffer = (const char *) buffer + (len & ~63);
+ len &= 63;
+ }
}
- for(t = 60; t < 80; t++)
+ /* Move remaining bytes in internal buffer. */
+ if (len > 0)
{
- temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3];
- E = D;
- D = C;
- C = SHA1CircularShift(30,B);
- B = A;
- A = temp;
+ size_t left_over = ctx->buflen;
+
+ memcpy (&((char *) ctx->buffer)[left_over], buffer, len);
+ left_over += len;
+ if (left_over >= 64)
+ {
+ sha1_process_block (ctx->buffer, 64, ctx);
+ left_over -= 64;
+ memcpy (ctx->buffer, &ctx->buffer[16], left_over);
+ }
+ ctx->buflen = left_over;
}
+}
- context->Intermediate_Hash[0] += A;
- context->Intermediate_Hash[1] += B;
- context->Intermediate_Hash[2] += C;
- context->Intermediate_Hash[3] += D;
- context->Intermediate_Hash[4] += E;
+/* --- Code below is the primary difference between md5.c and sha1.c --- */
- context->Message_Block_Index = 0;
-}
+/* SHA1 round constants */
+#define K1 0x5a827999
+#define K2 0x6ed9eba1
+#define K3 0x8f1bbcdc
+#define K4 0xca62c1d6
+
+/* Round functions. Note that F2 is the same as F4. */
+#define F1(B,C,D) ( D ^ ( B & ( C ^ D ) ) )
+#define F2(B,C,D) (B ^ C ^ D)
+#define F3(B,C,D) ( ( B & C ) | ( D & ( B | C ) ) )
+#define F4(B,C,D) (B ^ C ^ D)
+/* Process LEN bytes of BUFFER, accumulating context into CTX.
+ It is assumed that LEN % 64 == 0.
+ Most of this code comes from GnuPG's cipher/sha1.c. */
-/*
- * SHA1PadMessage
- *
- * Description:
- * According to the standard, the message must be padded to an even
- * 512 bits. The first padding bit must be a '1'. The last 64
- * bits represent the length of the original message. All bits in
- * between should be 0. This function will pad the message
- * according to those rules by filling the Message_Block array
- * accordingly. It will also call the ProcessMessageBlock function
- * provided appropriately. When it returns, it can be assumed that
- * the message digest has been computed.
- *
- * Parameters:
- * context: [in/out]
- * The context to pad
- * ProcessMessageBlock: [in]
- * The appropriate SHA*ProcessMessageBlock function
- * Returns:
- * Nothing.
- *
- */
-
-void SHA1PadMessage(SHA1Context *context)
+void
+sha1_process_block (const void *buffer, size_t len, struct sha1_ctx *ctx)
{
- /*
- * Check to see if the current message block is too small to hold
- * the initial padding bits and length. If so, we will pad the
- * block, process it, and then continue padding into a second
- * block.
- */
- if (context->Message_Block_Index > 55)
+ const uint32_t *words = buffer;
+ size_t nwords = len / sizeof (uint32_t);
+ const uint32_t *endp = words + nwords;
+ uint32_t x[16];
+ uint32_t a = ctx->A;
+ uint32_t b = ctx->B;
+ uint32_t c = ctx->C;
+ uint32_t d = ctx->D;
+ uint32_t e = ctx->E;
+
+ /* First increment the byte count. RFC 1321 specifies the possible
+ length of the file up to 2^64 bits. Here we only compute the
+ number of bytes. Do a double word increment. */
+ ctx->total[0] += len;
+ if (ctx->total[0] < len)
+ ++ctx->total[1];
+
+#define rol(x, n) (((x) << (n)) | ((uint32_t) (x) >> (32 - (n))))
+
+#define M(I) ( tm = x[I&0x0f] ^ x[(I-14)&0x0f] \
+ ^ x[(I-8)&0x0f] ^ x[(I-3)&0x0f] \
+ , (x[I&0x0f] = rol(tm, 1)) )
+
+#define R(A,B,C,D,E,F,K,M) do { E += rol( A, 5 ) \
+ + F( B, C, D ) \
+ + K \
+ + M; \
+ B = rol( B, 30 ); \
+ } while(0)
+
+ while (words < endp)
{
- context->Message_Block[context->Message_Block_Index++] = 0x80;
- while(context->Message_Block_Index < 64)
- {
- context->Message_Block[context->Message_Block_Index++] = 0;
- }
-
- SHA1ProcessMessageBlock(context);
-
- while(context->Message_Block_Index < 56)
- {
- context->Message_Block[context->Message_Block_Index++] = 0;
- }
+ uint32_t tm;
+ int t;
+ for (t = 0; t < 16; t++)
+ {
+ x[t] = SWAP (*words);
+ words++;
+ }
+
+ R( a, b, c, d, e, F1, K1, x[ 0] );
+ R( e, a, b, c, d, F1, K1, x[ 1] );
+ R( d, e, a, b, c, F1, K1, x[ 2] );
+ R( c, d, e, a, b, F1, K1, x[ 3] );
+ R( b, c, d, e, a, F1, K1, x[ 4] );
+ R( a, b, c, d, e, F1, K1, x[ 5] );
+ R( e, a, b, c, d, F1, K1, x[ 6] );
+ R( d, e, a, b, c, F1, K1, x[ 7] );
+ R( c, d, e, a, b, F1, K1, x[ 8] );
+ R( b, c, d, e, a, F1, K1, x[ 9] );
+ R( a, b, c, d, e, F1, K1, x[10] );
+ R( e, a, b, c, d, F1, K1, x[11] );
+ R( d, e, a, b, c, F1, K1, x[12] );
+ R( c, d, e, a, b, F1, K1, x[13] );
+ R( b, c, d, e, a, F1, K1, x[14] );
+ R( a, b, c, d, e, F1, K1, x[15] );
+ R( e, a, b, c, d, F1, K1, M(16) );
+ R( d, e, a, b, c, F1, K1, M(17) );
+ R( c, d, e, a, b, F1, K1, M(18) );
+ R( b, c, d, e, a, F1, K1, M(19) );
+ R( a, b, c, d, e, F2, K2, M(20) );
+ R( e, a, b, c, d, F2, K2, M(21) );
+ R( d, e, a, b, c, F2, K2, M(22) );
+ R( c, d, e, a, b, F2, K2, M(23) );
+ R( b, c, d, e, a, F2, K2, M(24) );
+ R( a, b, c, d, e, F2, K2, M(25) );
+ R( e, a, b, c, d, F2, K2, M(26) );
+ R( d, e, a, b, c, F2, K2, M(27) );
+ R( c, d, e, a, b, F2, K2, M(28) );
+ R( b, c, d, e, a, F2, K2, M(29) );
+ R( a, b, c, d, e, F2, K2, M(30) );
+ R( e, a, b, c, d, F2, K2, M(31) );
+ R( d, e, a, b, c, F2, K2, M(32) );
+ R( c, d, e, a, b, F2, K2, M(33) );
+ R( b, c, d, e, a, F2, K2, M(34) );
+ R( a, b, c, d, e, F2, K2, M(35) );
+ R( e, a, b, c, d, F2, K2, M(36) );
+ R( d, e, a, b, c, F2, K2, M(37) );
+ R( c, d, e, a, b, F2, K2, M(38) );
+ R( b, c, d, e, a, F2, K2, M(39) );
+ R( a, b, c, d, e, F3, K3, M(40) );
+ R( e, a, b, c, d, F3, K3, M(41) );
+ R( d, e, a, b, c, F3, K3, M(42) );
+ R( c, d, e, a, b, F3, K3, M(43) );
+ R( b, c, d, e, a, F3, K3, M(44) );
+ R( a, b, c, d, e, F3, K3, M(45) );
+ R( e, a, b, c, d, F3, K3, M(46) );
+ R( d, e, a, b, c, F3, K3, M(47) );
+ R( c, d, e, a, b, F3, K3, M(48) );
+ R( b, c, d, e, a, F3, K3, M(49) );
+ R( a, b, c, d, e, F3, K3, M(50) );
+ R( e, a, b, c, d, F3, K3, M(51) );
+ R( d, e, a, b, c, F3, K3, M(52) );
+ R( c, d, e, a, b, F3, K3, M(53) );
+ R( b, c, d, e, a, F3, K3, M(54) );
+ R( a, b, c, d, e, F3, K3, M(55) );
+ R( e, a, b, c, d, F3, K3, M(56) );
+ R( d, e, a, b, c, F3, K3, M(57) );
+ R( c, d, e, a, b, F3, K3, M(58) );
+ R( b, c, d, e, a, F3, K3, M(59) );
+ R( a, b, c, d, e, F4, K4, M(60) );
+ R( e, a, b, c, d, F4, K4, M(61) );
+ R( d, e, a, b, c, F4, K4, M(62) );
+ R( c, d, e, a, b, F4, K4, M(63) );
+ R( b, c, d, e, a, F4, K4, M(64) );
+ R( a, b, c, d, e, F4, K4, M(65) );
+ R( e, a, b, c, d, F4, K4, M(66) );
+ R( d, e, a, b, c, F4, K4, M(67) );
+ R( c, d, e, a, b, F4, K4, M(68) );
+ R( b, c, d, e, a, F4, K4, M(69) );
+ R( a, b, c, d, e, F4, K4, M(70) );
+ R( e, a, b, c, d, F4, K4, M(71) );
+ R( d, e, a, b, c, F4, K4, M(72) );
+ R( c, d, e, a, b, F4, K4, M(73) );
+ R( b, c, d, e, a, F4, K4, M(74) );
+ R( a, b, c, d, e, F4, K4, M(75) );
+ R( e, a, b, c, d, F4, K4, M(76) );
+ R( d, e, a, b, c, F4, K4, M(77) );
+ R( c, d, e, a, b, F4, K4, M(78) );
+ R( b, c, d, e, a, F4, K4, M(79) );
+
+ a = ctx->A += a;
+ b = ctx->B += b;
+ c = ctx->C += c;
+ d = ctx->D += d;
+ e = ctx->E += e;
}
- else
- {
- context->Message_Block[context->Message_Block_Index++] = 0x80;
- while(context->Message_Block_Index < 56)
- {
- context->Message_Block[context->Message_Block_Index++] = 0;
- }
- }
-
- /*
- * Store the message length as the last 8 octets
- */
- context->Message_Block[56] = context->Length_High >> 24;
- context->Message_Block[57] = context->Length_High >> 16;
- context->Message_Block[58] = context->Length_High >> 8;
- context->Message_Block[59] = context->Length_High;
- context->Message_Block[60] = context->Length_Low >> 24;
- context->Message_Block[61] = context->Length_Low >> 16;
- context->Message_Block[62] = context->Length_Low >> 8;
- context->Message_Block[63] = context->Length_Low;
-
- SHA1ProcessMessageBlock(context);
}
-#define SHA_DIGESTSIZE 20
-#define SHA_BLOCKSIZE 64
+/* memxor.c -- perform binary exclusive OR operation of two memory blocks.
+ Copyright (C) 2005, 2006 Free Software Foundation, Inc.
-/* Function to compute the digest */
-void
-hmac_sha(unsigned char* k, /* secret key */
- int lk, /* length of the key in bytes */
- unsigned char* d, /* data */
- int ld, /* length of data in bytes */
- unsigned char* out, /* output buffer, at least "t" bytes */
- int t)
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/* Written by Simon Josefsson. The interface was inspired by memxor
+ in Niels Möller's Nettle. */
+
+void *
+memxor (void * dest, const void * src, size_t n)
{
- SHA1Context ictx, octx ;
- unsigned char isha[SHA_DIGESTSIZE], osha[SHA_DIGESTSIZE] ;
- unsigned char key[SHA_DIGESTSIZE] ;
- unsigned char buf[SHA_BLOCKSIZE] ;
- int i ;
+ char const *s = src;
+ char *d = dest;
- if (lk > SHA_BLOCKSIZE) {
+ for (; n > 0; n--)
+ *d++ ^= *s++;
- SHA1Context tctx ;
+ return dest;
+}
- SHA1Reset(&tctx) ;
- SHA1Input(&tctx, k, lk) ;
- SHA1Result(&tctx, key) ;
+/* hmac-sha1.c -- hashed message authentication codes
+ Copyright (C) 2005, 2006 Free Software Foundation, Inc.
- k = key ;
- lk = SHA_DIGESTSIZE ;
- }
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
- /**** Inner Digest ****/
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- SHA1Reset(&ictx) ;
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
- /* Pad the key for inner digest */
- for (i = 0 ; i < lk ; ++i)
- buf[i] = k[i] ^ 0x36 ;
+/* Written by Simon Josefsson. */
- for (i = lk ; i < SHA_BLOCKSIZE ; ++i)
- buf[i] = 0x36 ;
+#define IPAD 0x36
+#define OPAD 0x5c
+
+int
+hmac_sha1 (const void *key, size_t keylen,
+ const void *in, size_t inlen, void *resbuf)
+{
+ struct sha1_ctx inner;
+ struct sha1_ctx outer;
+ char optkeybuf[20];
+ char block[64];
+ char innerhash[20];
+
+ /* Reduce the key's size, so that it becomes <= 64 bytes large. */
+
+ if (keylen > 64)
+ {
+ struct sha1_ctx keyhash;
+
+ sha1_init_ctx (&keyhash);
+ sha1_process_bytes (key, keylen, &keyhash);
+ sha1_finish_ctx (&keyhash, optkeybuf);
+
+ key = optkeybuf;
+ keylen = 20;
+ }
- SHA1Input(&ictx, buf, SHA_BLOCKSIZE) ;
- SHA1Input(&ictx, d, ld) ;
+ /* Compute INNERHASH from KEY and IN. */
- SHA1Result(&ictx, isha) ;
+ sha1_init_ctx (&inner);
- /**** Outter Digest ****/
+ memset (block, IPAD, sizeof (block));
+ memxor (block, key, keylen);
- SHA1Reset(&octx) ;
+ sha1_process_block (block, 64, &inner);
+ sha1_process_bytes (in, inlen, &inner);
- /* Pad the key for outter digest */
+ sha1_finish_ctx (&inner, innerhash);
+ /* Compute result from KEY and INNERHASH. */
- for (i = 0 ; i < lk ; ++i) buf[i] = k[i] ^ 0x5C ;
- for (i = lk ; i < SHA_BLOCKSIZE ; ++i) buf[i] = 0x5C ;
+ sha1_init_ctx (&outer);
- SHA1Input(&octx, buf, SHA_BLOCKSIZE) ;
- SHA1Input(&octx, isha, SHA_DIGESTSIZE) ;
+ memset (block, OPAD, sizeof (block));
+ memxor (block, key, keylen);
- SHA1Result(&octx, osha) ;
+ sha1_process_block (block, 64, &outer);
+ sha1_process_bytes (innerhash, 20, &outer);
- /* truncate the results */
- t = t > SHA_DIGESTSIZE ? SHA_DIGESTSIZE : t ;
- memcpy(out, osha, t);
+ sha1_finish_ctx (&outer, resbuf);
+ return 0;
}
diff --git a/tools/hmac-sha1.h b/tools/hmac-sha1.h
index e5be1cfc38..b3969d6148 100644
--- a/tools/hmac-sha1.h
+++ b/tools/hmac-sha1.h
@@ -1,77 +1,123 @@
-/*
- * sha1.h
- *
- * Description:
- * This is the header file for code which implements the Secure
- * Hashing Algorithm 1 as defined in FIPS PUB 180-1 published
- * April 17, 1995.
- *
- * Many of the variable names in this code, especially the
- * single character names, were used because those were the names
- * used in the publication.
- *
- * Please read the file sha1.c for more information.
- *
- */
-
-#ifndef _SHA1_H_
-#define _SHA1_H_
+/* Taken from gnulib (http://savannah.gnu.org/projects/gnulib/) */
+/* Declarations of functions and data types used for SHA1 sum
+ library functions.
+ Copyright (C) 2000, 2001, 2003, 2005, 2006 Free Software Foundation, Inc.
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef SHA1_H
+#define SHA1_H 1
+
+#include <stdio.h>
#include <stdint.h>
-/*
- * If you do not have the ISO standard stdint.h header file, then you
- * must typdef the following:
- * name meaning
- * uint32_t unsigned 32 bit integer
- * uint8_t unsigned 8 bit integer (i.e., unsigned char)
- * int_least16_t integer of >= 16 bits
- *
- */
-
-#ifndef _SHA_enum_
-#define _SHA_enum_
-enum
+
+/* Structure to save state of computation between the single steps. */
+struct sha1_ctx
{
- shaSuccess = 0,
- shaNull, /* Null pointer parameter */
- shaInputTooLong, /* input data too long */
- shaStateError /* called Input after Result */
+ uint32_t A;
+ uint32_t B;
+ uint32_t C;
+ uint32_t D;
+ uint32_t E;
+
+ uint32_t total[2];
+ uint32_t buflen;
+ uint32_t buffer[32];
};
-#endif
-#define SHA1HashSize 20
-/*
- * This structure will hold context information for the SHA-1
- * hashing operation
- */
-typedef struct SHA1Context
-{
- uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest */
- uint32_t Length_Low; /* Message length in bits */
- uint32_t Length_High; /* Message length in bits */
+/* Initialize structure containing state of computation. */
+extern void sha1_init_ctx (struct sha1_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is necessary that LEN is a multiple of 64!!! */
+extern void sha1_process_block (const void *buffer, size_t len,
+ struct sha1_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is NOT required that LEN is a multiple of 64. */
+extern void sha1_process_bytes (const void *buffer, size_t len,
+ struct sha1_ctx *ctx);
+
+/* Process the remaining bytes in the buffer and put result from CTX
+ in first 20 bytes following RESBUF. The result is always in little
+ endian byte order, so that a byte-wise output yields to the wanted
+ ASCII representation of the message digest.
+
+ IMPORTANT: On some systems it is required that RESBUF be correctly
+ aligned for a 32 bits value. */
+extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf);
- /* Index into message block array */
- int_least16_t Message_Block_Index;
- uint8_t Message_Block[64]; /* 512-bit message blocks */
- int Computed; /* Is the digest computed? */
- int Corrupted; /* Is the message digest corrupted? */
-} SHA1Context;
+/* Put result from CTX in first 20 bytes following RESBUF. The result is
+ always in little endian byte order, so that a byte-wise output yields
+ to the wanted ASCII representation of the message digest.
-/*
- * Function Prototypes
- */
+ IMPORTANT: On some systems it is required that RESBUF is correctly
+ aligned for a 32 bits value. */
+extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf);
-int SHA1Reset( SHA1Context *);
-int SHA1Input( SHA1Context *,
- const uint8_t *,
- unsigned int);
-int SHA1Result( SHA1Context *,
- uint8_t Message_Digest[SHA1HashSize]);
-void hmac_sha(unsigned char* k, int lk,
- unsigned char* d, int ld,
- unsigned char* out, int t);
+/* Compute SHA1 message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 20 bytes
+ beginning at RESBLOCK. */
+extern int sha1_stream (FILE *stream, void *resblock);
+
+/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+extern void *sha1_buffer (const char *buffer, size_t len, void *resblock);
#endif
+
+
+/* hmac.h -- hashed message authentication codes
+ Copyright (C) 2005 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/* Written by Simon Josefsson. */
+
+#ifndef HMAC_H
+#define HMAC_H 1
+
+#include <stddef.h>
+
+/* Compute Hashed Message Authentication Code with SHA-1, over BUFFER
+ data of BUFLEN bytes using the KEY of KEYLEN bytes, writing the
+ output to pre-allocated 20 byte minimum RESBUF buffer. Return 0 on
+ success. */
+int
+hmac_sha1 (const void *key, size_t keylen,
+ const void *in, size_t inlen, void *resbuf);
+
+#endif /* HMAC_H */