forked from len0rd/rockbox
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
This commit is contained in:
Maurus Cuelenaere
parent
ab796a2e49
commit
49236bb62b
3 changed files with 605 additions and 496 deletions
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@ -1,453 +1,516 @@
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/*
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* sha1.c
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*
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* Description:
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* This file implements the Secure Hashing Algorithm 1 as
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* defined in FIPS PUB 180-1 published April 17, 1995.
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*
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* The SHA-1, produces a 160-bit message digest for a given
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* data stream. It should take about 2**n steps to find a
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* message with the same digest as a given message and
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* 2**(n/2) to find any two messages with the same digest,
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* when n is the digest size in bits. Therefore, this
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* algorithm can serve as a means of providing a
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* "fingerprint" for a message.
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*
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* Portability Issues:
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* SHA-1 is defined in terms of 32-bit "words". This code
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* uses <stdint.h> (included via "sha1.h" to define 32 and 8
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* bit unsigned integer types. If your C compiler does not
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* support 32 bit unsigned integers, this code is not
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* appropriate.
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*
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* Caveats:
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* SHA-1 is designed to work with messages less than 2^64 bits
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* long. Although SHA-1 allows a message digest to be generated
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* for messages of any number of bits less than 2^64, this
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* implementation only works with messages with a length that is
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* a multiple of the size of an 8-bit character.
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*
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*/
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/* sha1.c - Functions to compute SHA1 message digest of files or
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memory blocks according to the NIST specification FIPS-180-1.
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#include <string.h>
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Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006 Free Software
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Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/* Written by Scott G. Miller
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Credits:
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Robert Klep <robert@ilse.nl> -- Expansion function fix
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*/
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#include "hmac-sha1.h"
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/*
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* Define the SHA1 circular left shift macro
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*/
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#define SHA1CircularShift(bits,word) \
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(((word) << (bits)) | ((word) >> (32-(bits))))
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/* Local Function Prototyptes */
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void SHA1PadMessage(SHA1Context *);
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void SHA1ProcessMessageBlock(SHA1Context *);
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/*
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* SHA1Reset
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*
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* Description:
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* This function will initialize the SHA1Context in preparation
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* for computing a new SHA1 message digest.
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*
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* Parameters:
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* context: [in/out]
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* The context to reset.
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*
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* Returns:
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* sha Error Code.
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*
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*/
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int SHA1Reset(SHA1Context *context)
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{
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if (!context)
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{
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return shaNull;
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}
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context->Length_Low = 0;
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context->Length_High = 0;
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context->Message_Block_Index = 0;
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context->Intermediate_Hash[0] = 0x67452301;
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context->Intermediate_Hash[1] = 0xEFCDAB89;
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context->Intermediate_Hash[2] = 0x98BADCFE;
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context->Intermediate_Hash[3] = 0x10325476;
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context->Intermediate_Hash[4] = 0xC3D2E1F0;
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context->Computed = 0;
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context->Corrupted = 0;
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return shaSuccess;
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}
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/*
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* SHA1Result
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*
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* Description:
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* This function will return the 160-bit message digest into the
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* Message_Digest array provided by the caller.
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* NOTE: The first octet of hash is stored in the 0th element,
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* the last octet of hash in the 19th element.
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*
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* Parameters:
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* context: [in/out]
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* The context to use to calculate the SHA-1 hash.
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* Message_Digest: [out]
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* Where the digest is returned.
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*
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* Returns:
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* sha Error Code.
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*
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*/
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int SHA1Result( SHA1Context *context,
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uint8_t Message_Digest[SHA1HashSize])
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{
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int i;
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if (!context || !Message_Digest)
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{
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return shaNull;
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}
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if (context->Corrupted)
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{
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return context->Corrupted;
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}
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if (!context->Computed)
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{
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SHA1PadMessage(context);
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for(i=0; i<64; ++i)
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{
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/* message may be sensitive, clear it out */
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context->Message_Block[i] = 0;
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}
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context->Length_Low = 0; /* and clear length */
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context->Length_High = 0;
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context->Computed = 1;
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}
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for(i = 0; i < SHA1HashSize; ++i)
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{
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Message_Digest[i] = context->Intermediate_Hash[i>>2]
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>> 8 * ( 3 - ( i & 0x03 ) );
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}
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return shaSuccess;
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}
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/*
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* SHA1Input
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*
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* Description:
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* This function accepts an array of octets as the next portion
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* of the message.
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*
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* Parameters:
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* context: [in/out]
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* The SHA context to update
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* message_array: [in]
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* An array of characters representing the next portion of
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* the message.
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* length: [in]
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* The length of the message in message_array
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*
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* Returns:
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* sha Error Code.
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*
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*/
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int SHA1Input( SHA1Context *context,
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const uint8_t *message_array,
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unsigned length)
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{
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if (!length)
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{
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return shaSuccess;
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}
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if (!context || !message_array)
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{
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return shaNull;
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}
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if (context->Computed)
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{
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context->Corrupted = shaStateError;
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return shaStateError;
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}
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if (context->Corrupted)
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{
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return context->Corrupted;
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}
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while(length-- && !context->Corrupted)
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{
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context->Message_Block[context->Message_Block_Index++] =
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(*message_array & 0xFF);
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context->Length_Low += 8;
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if (context->Length_Low == 0)
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{
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context->Length_High++;
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if (context->Length_High == 0)
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{
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/* Message is too long */
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context->Corrupted = 1;
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}
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}
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if (context->Message_Block_Index == 64)
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{
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SHA1ProcessMessageBlock(context);
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}
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message_array++;
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}
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return shaSuccess;
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}
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/*
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* SHA1ProcessMessageBlock
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*
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* Description:
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* This function will process the next 512 bits of the message
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* stored in the Message_Block array.
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*
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* Parameters:
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* None.
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*
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* Returns:
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* Nothing.
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*
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* Comments:
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* Many of the variable names in this code, especially the
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* single character names, were used because those were the
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* names used in the publication.
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*
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*
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*/
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void SHA1ProcessMessageBlock(SHA1Context *context)
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{
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const uint32_t K[] = { /* Constants defined in SHA-1 */
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0x5A827999,
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0x6ED9EBA1,
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0x8F1BBCDC,
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0xCA62C1D6
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};
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int t; /* Loop counter */
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uint32_t temp; /* Temporary word value */
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uint32_t W[80]; /* Word sequence */
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uint32_t A, B, C, D, E; /* Word buffers */
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/*
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* Initialize the first 16 words in the array W
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*/
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for(t = 0; t < 16; t++)
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{
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W[t] = context->Message_Block[t * 4] << 24;
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W[t] |= context->Message_Block[t * 4 + 1] << 16;
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W[t] |= context->Message_Block[t * 4 + 2] << 8;
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W[t] |= context->Message_Block[t * 4 + 3];
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}
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for(t = 16; t < 80; t++)
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{
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W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
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}
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A = context->Intermediate_Hash[0];
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B = context->Intermediate_Hash[1];
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C = context->Intermediate_Hash[2];
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D = context->Intermediate_Hash[3];
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E = context->Intermediate_Hash[4];
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for(t = 0; t < 20; t++)
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{
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temp = SHA1CircularShift(5,A) +
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((B & C) | ((~B) & D)) + E + W[t] + K[0];
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E = D;
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D = C;
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C = SHA1CircularShift(30,B);
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B = A;
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A = temp;
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}
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for(t = 20; t < 40; t++)
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{
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temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1];
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E = D;
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D = C;
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C = SHA1CircularShift(30,B);
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B = A;
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A = temp;
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}
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for(t = 40; t < 60; t++)
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{
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temp = SHA1CircularShift(5,A) +
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((B & C) | (B & D) | (C & D)) + E + W[t] + K[2];
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E = D;
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D = C;
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C = SHA1CircularShift(30,B);
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B = A;
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A = temp;
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}
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for(t = 60; t < 80; t++)
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{
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temp = SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3];
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E = D;
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D = C;
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C = SHA1CircularShift(30,B);
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B = A;
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A = temp;
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}
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context->Intermediate_Hash[0] += A;
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context->Intermediate_Hash[1] += B;
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context->Intermediate_Hash[2] += C;
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context->Intermediate_Hash[3] += D;
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context->Intermediate_Hash[4] += E;
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context->Message_Block_Index = 0;
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}
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#include <stddef.h>
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#include <string.h>
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/*
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* SHA1PadMessage
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*
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* Description:
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* According to the standard, the message must be padded to an even
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* 512 bits. The first padding bit must be a '1'. The last 64
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* bits represent the length of the original message. All bits in
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* between should be 0. This function will pad the message
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* according to those rules by filling the Message_Block array
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* accordingly. It will also call the ProcessMessageBlock function
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* provided appropriately. When it returns, it can be assumed that
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* the message digest has been computed.
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*
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* Parameters:
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* context: [in/out]
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* The context to pad
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* ProcessMessageBlock: [in]
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* The appropriate SHA*ProcessMessageBlock function
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* Returns:
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* Nothing.
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*
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*/
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#ifdef WORDS_BIGENDIAN
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# define SWAP(n) (n)
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#else
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# define SWAP(n) \
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(((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
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#endif
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void SHA1PadMessage(SHA1Context *context)
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{
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/*
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* Check to see if the current message block is too small to hold
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* the initial padding bits and length. If so, we will pad the
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* block, process it, and then continue padding into a second
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* block.
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*/
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if (context->Message_Block_Index > 55)
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{
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context->Message_Block[context->Message_Block_Index++] = 0x80;
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while(context->Message_Block_Index < 64)
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{
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context->Message_Block[context->Message_Block_Index++] = 0;
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}
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#define BLOCKSIZE 4096
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#if BLOCKSIZE % 64 != 0
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# error "invalid BLOCKSIZE"
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#endif
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SHA1ProcessMessageBlock(context);
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/* This array contains the bytes used to pad the buffer to the next
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64-byte boundary. (RFC 1321, 3.1: Step 1) */
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static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
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while(context->Message_Block_Index < 56)
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{
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context->Message_Block[context->Message_Block_Index++] = 0;
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}
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}
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else
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{
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context->Message_Block[context->Message_Block_Index++] = 0x80;
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while(context->Message_Block_Index < 56)
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{
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context->Message_Block[context->Message_Block_Index++] = 0;
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}
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}
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/*
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* Store the message length as the last 8 octets
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*/
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context->Message_Block[56] = context->Length_High >> 24;
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context->Message_Block[57] = context->Length_High >> 16;
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context->Message_Block[58] = context->Length_High >> 8;
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context->Message_Block[59] = context->Length_High;
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context->Message_Block[60] = context->Length_Low >> 24;
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context->Message_Block[61] = context->Length_Low >> 16;
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context->Message_Block[62] = context->Length_Low >> 8;
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context->Message_Block[63] = context->Length_Low;
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SHA1ProcessMessageBlock(context);
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}
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#define SHA_DIGESTSIZE 20
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#define SHA_BLOCKSIZE 64
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/* Function to compute the digest */
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/* Take a pointer to a 160 bit block of data (five 32 bit ints) and
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initialize it to the start constants of the SHA1 algorithm. This
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must be called before using hash in the call to sha1_hash. */
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void
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hmac_sha(unsigned char* k, /* secret key */
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int lk, /* length of the key in bytes */
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unsigned char* d, /* data */
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int ld, /* length of data in bytes */
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unsigned char* out, /* output buffer, at least "t" bytes */
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int t)
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sha1_init_ctx (struct sha1_ctx *ctx)
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{
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SHA1Context ictx, octx ;
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unsigned char isha[SHA_DIGESTSIZE], osha[SHA_DIGESTSIZE] ;
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unsigned char key[SHA_DIGESTSIZE] ;
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unsigned char buf[SHA_BLOCKSIZE] ;
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int i ;
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ctx->A = 0x67452301;
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ctx->B = 0xefcdab89;
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ctx->C = 0x98badcfe;
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ctx->D = 0x10325476;
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ctx->E = 0xc3d2e1f0;
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if (lk > SHA_BLOCKSIZE) {
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ctx->total[0] = ctx->total[1] = 0;
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ctx->buflen = 0;
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}
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SHA1Context tctx ;
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/* Put result from CTX in first 20 bytes following RESBUF. The result
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must be in little endian byte order.
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SHA1Reset(&tctx) ;
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SHA1Input(&tctx, k, lk) ;
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SHA1Result(&tctx, key) ;
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IMPORTANT: On some systems it is required that RESBUF is correctly
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aligned for a 32-bit value. */
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void *
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sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf)
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{
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((uint32_t *) resbuf)[0] = SWAP (ctx->A);
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((uint32_t *) resbuf)[1] = SWAP (ctx->B);
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((uint32_t *) resbuf)[2] = SWAP (ctx->C);
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((uint32_t *) resbuf)[3] = SWAP (ctx->D);
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((uint32_t *) resbuf)[4] = SWAP (ctx->E);
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k = key ;
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lk = SHA_DIGESTSIZE ;
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return resbuf;
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}
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|
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/* Process the remaining bytes in the internal buffer and the usual
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prolog according to the standard and write the result to RESBUF.
|
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|
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IMPORTANT: On some systems it is required that RESBUF is correctly
|
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aligned for a 32-bit value. */
|
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void *
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sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf)
|
||||
{
|
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/* Take yet unprocessed bytes into account. */
|
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uint32_t bytes = ctx->buflen;
|
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size_t size = (bytes < 56) ? 64 / 4 : 64 * 2 / 4;
|
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|
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/* Now count remaining bytes. */
|
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ctx->total[0] += bytes;
|
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if (ctx->total[0] < bytes)
|
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++ctx->total[1];
|
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|
||||
/* 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));
|
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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 sha1_read_ctx (ctx, resbuf);
|
||||
}
|
||||
|
||||
/* 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)
|
||||
{
|
||||
struct sha1_ctx ctx;
|
||||
char buffer[BLOCKSIZE + 72];
|
||||
size_t sum;
|
||||
|
||||
/* Initialize the computation context. */
|
||||
sha1_init_ctx (&ctx);
|
||||
|
||||
/* Iterate over full file contents. */
|
||||
while (1)
|
||||
{
|
||||
/* 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);
|
||||
}
|
||||
|
||||
/**** Inner Digest ****/
|
||||
process_partial_block:;
|
||||
|
||||
SHA1Reset(&ictx) ;
|
||||
|
||||
/* Pad the key for inner digest */
|
||||
for (i = 0 ; i < lk ; ++i)
|
||||
buf[i] = k[i] ^ 0x36 ;
|
||||
|
||||
for (i = lk ; i < SHA_BLOCKSIZE ; ++i)
|
||||
buf[i] = 0x36 ;
|
||||
|
||||
SHA1Input(&ictx, buf, SHA_BLOCKSIZE) ;
|
||||
SHA1Input(&ictx, d, ld) ;
|
||||
|
||||
SHA1Result(&ictx, isha) ;
|
||||
|
||||
/**** Outter Digest ****/
|
||||
|
||||
SHA1Reset(&octx) ;
|
||||
|
||||
/* Pad the key for outter digest */
|
||||
|
||||
|
||||
for (i = 0 ; i < lk ; ++i) buf[i] = k[i] ^ 0x5C ;
|
||||
for (i = lk ; i < SHA_BLOCKSIZE ; ++i) buf[i] = 0x5C ;
|
||||
|
||||
SHA1Input(&octx, buf, SHA_BLOCKSIZE) ;
|
||||
SHA1Input(&octx, isha, SHA_DIGESTSIZE) ;
|
||||
|
||||
SHA1Result(&octx, osha) ;
|
||||
|
||||
/* truncate the results */
|
||||
t = t > SHA_DIGESTSIZE ? SHA_DIGESTSIZE : t ;
|
||||
memcpy(out, osha, t);
|
||||
/* Process any remaining bytes. */
|
||||
if (sum > 0)
|
||||
sha1_process_bytes (buffer, sum, &ctx);
|
||||
|
||||
/* Construct result in desired memory. */
|
||||
sha1_finish_ctx (&ctx, resblock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* 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)
|
||||
{
|
||||
struct sha1_ctx ctx;
|
||||
|
||||
/* Initialize the computation context. */
|
||||
sha1_init_ctx (&ctx);
|
||||
|
||||
/* Process whole buffer but last len % 64 bytes. */
|
||||
sha1_process_bytes (buffer, len, &ctx);
|
||||
|
||||
/* Put result in desired memory area. */
|
||||
return sha1_finish_ctx (&ctx, resblock);
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
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;
|
||||
}
|
||||
|
||||
/* Process available complete blocks. */
|
||||
if (len >= 64)
|
||||
{
|
||||
#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;
|
||||
}
|
||||
}
|
||||
|
||||
/* Move remaining bytes in internal buffer. */
|
||||
if (len > 0)
|
||||
{
|
||||
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;
|
||||
}
|
||||
}
|
||||
|
||||
/* --- Code below is the primary difference between md5.c and sha1.c --- */
|
||||
|
||||
/* 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. */
|
||||
|
||||
void
|
||||
sha1_process_block (const void *buffer, size_t len, struct sha1_ctx *ctx)
|
||||
{
|
||||
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)
|
||||
{
|
||||
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;
|
||||
}
|
||||
}
|
||||
|
||||
/* memxor.c -- perform binary exclusive OR operation of two memory blocks.
|
||||
Copyright (C) 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 Simon Josefsson. The interface was inspired by memxor
|
||||
in Niels Möller's Nettle. */
|
||||
|
||||
void *
|
||||
memxor (void * dest, const void * src, size_t n)
|
||||
{
|
||||
char const *s = src;
|
||||
char *d = dest;
|
||||
|
||||
for (; n > 0; n--)
|
||||
*d++ ^= *s++;
|
||||
|
||||
return dest;
|
||||
}
|
||||
|
||||
/* hmac-sha1.c -- hashed message authentication codes
|
||||
Copyright (C) 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 Simon Josefsson. */
|
||||
|
||||
#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;
|
||||
}
|
||||
|
||||
/* Compute INNERHASH from KEY and IN. */
|
||||
|
||||
sha1_init_ctx (&inner);
|
||||
|
||||
memset (block, IPAD, sizeof (block));
|
||||
memxor (block, key, keylen);
|
||||
|
||||
sha1_process_block (block, 64, &inner);
|
||||
sha1_process_bytes (in, inlen, &inner);
|
||||
|
||||
sha1_finish_ctx (&inner, innerhash);
|
||||
|
||||
/* Compute result from KEY and INNERHASH. */
|
||||
|
||||
sha1_init_ctx (&outer);
|
||||
|
||||
memset (block, OPAD, sizeof (block));
|
||||
memxor (block, key, keylen);
|
||||
|
||||
sha1_process_block (block, 64, &outer);
|
||||
sha1_process_bytes (innerhash, 20, &outer);
|
||||
|
||||
sha1_finish_ctx (&outer, resbuf);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue