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Wolf3s
335 lines
9.6 KiB
C
335 lines
9.6 KiB
C
/**************************** sha.h ****************************/
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/******************* See RFC 4634 for details ******************/
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#ifndef _SHA_H_
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#define _SHA_H_
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#ifndef USE_SHA1
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#define USE_SHA1 0
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#endif
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#ifndef USE_SHA224
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#define USE_SHA224 0
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#endif
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#ifndef USE_SHA384_SHA512
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#define USE_SHA384_SHA512 1
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#endif
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/*
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* Description:
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* This file implements the Secure Hash Signature Standard
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* algorithms as defined in the National Institute of Standards
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* and Technology Federal Information Processing Standards
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* Publication (FIPS PUB) 180-1 published on April 17, 1995, 180-2
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* published on August 1, 2002, and the FIPS PUB 180-2 Change
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* Notice published on February 28, 2004.
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*
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* A combined document showing all algorithms is available at
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* http://csrc.nist.gov/publications/fips/
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* fips180-2/fips180-2withchangenotice.pdf
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*
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* The five hashes are defined in these sizes:
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* SHA-1 20 byte / 160 bit
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* SHA-224 28 byte / 224 bit
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* SHA-256 32 byte / 256 bit
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* SHA-384 48 byte / 384 bit
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* SHA-512 64 byte / 512 bit
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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/*
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* If you do not have the ISO standard stdint.h header file, then you
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* must typedef the following:
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* name meaning
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* uint64_t unsigned 64 bit integer
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* uint32_t unsigned 32 bit integer
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* uint8_t unsigned 8 bit integer (i.e., unsigned char)
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* int_least16_t integer of >= 16 bits
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*
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*/
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#ifndef _SHA_enum_
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#define _SHA_enum_
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/*
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* All SHA functions return one of these values.
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*/
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enum
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{
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shaSuccess = 0,
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shaNull, /* Null pointer parameter */
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shaInputTooLong, /* input data too long */
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shaStateError, /* called Input after FinalBits or Result */
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shaBadParam /* passed a bad parameter */
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};
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#endif /* _SHA_enum_ */
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/*
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* These constants hold size information for each of the SHA
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* hashing operations
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*/
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enum
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{
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#if defined(USE_SHA1) && USE_SHA1
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SHA1_Message_Block_Size = 64,
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SHA1HashSize = 20,
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SHA1HashSizeBits = 160,
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#endif
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#if defined(USE_SHA224) && USE_SHA224
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SHA224_Message_Block_Size = 64,
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SHA224HashSize = 28,
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SHA224HashSizeBits = 224,
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#endif
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#if defined(USE_SHA384_SHA512) && USE_SHA384_SHA512
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SHA384_Message_Block_Size = 128,
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SHA384HashSize = 48,
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SHA384HashSizeBits = 384,
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#endif
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SHA256_Message_Block_Size = 64,
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SHA512_Message_Block_Size = 128,
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USHA_Max_Message_Block_Size = SHA512_Message_Block_Size,
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SHA256HashSize = 32,
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SHA512HashSize = 64,
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USHAMaxHashSize = SHA512HashSize,
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SHA256HashSizeBits = 256,
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SHA512HashSizeBits = 512, USHAMaxHashSizeBits = SHA512HashSizeBits
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};
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/*
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* These constants are used in the USHA (unified sha) functions.
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*/
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typedef enum SHAversion
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{
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#if defined(USE_SHA1) && USE_SHA1
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SHA1,
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#endif
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#if defined(USE_SHA224) && USE_SHA224
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SHA224,
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#endif
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#if defined(USE_SHA384_SHA512) && USE_SHA384_SHA512
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SHA384,
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SHA512,
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#endif
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SHA256
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} SHAversion;
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#if defined(USE_SHA1) && USE_SHA1
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/*
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* This structure will hold context information for the SHA-1
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* hashing operation.
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*/
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typedef struct SHA1Context
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{
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uint32_t Intermediate_Hash[SHA1HashSize / 4]; /* Message Digest */
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uint32_t Length_Low; /* Message length in bits */
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uint32_t Length_High; /* Message length in bits */
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int_least16_t Message_Block_Index; /* Message_Block array index */
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/* 512-bit message blocks */
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uint8_t Message_Block[SHA1_Message_Block_Size];
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int Computed; /* Is the digest computed? */
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int Corrupted; /* Is the digest corrupted? */
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} SHA1Context;
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#endif
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/*
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* This structure will hold context information for the SHA-256
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* hashing operation.
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*/
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typedef struct SHA256Context
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{
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uint32_t Intermediate_Hash[SHA256HashSize / 4]; /* Message Digest */
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uint32_t Length_Low; /* Message length in bits */
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uint32_t Length_High; /* Message length in bits */
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int_least16_t Message_Block_Index; /* Message_Block array index */
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/* 512-bit message blocks */
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uint8_t Message_Block[SHA256_Message_Block_Size];
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int Computed; /* Is the digest computed? */
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int Corrupted; /* Is the digest corrupted? */
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} SHA256Context;
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/*
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* This structure will hold context information for the SHA-512
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* hashing operation.
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*/
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typedef struct SHA512Context
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{
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#ifdef USE_32BIT_ONLY
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uint32_t Intermediate_Hash[SHA512HashSize / 4]; /* Message Digest */
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uint32_t Length[4]; /* Message length in bits */
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#else /* !USE_32BIT_ONLY */
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uint64_t Intermediate_Hash[SHA512HashSize / 8]; /* Message Digest */
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uint64_t Length_Low, Length_High; /* Message length in bits */
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#endif /* USE_32BIT_ONLY */
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int_least16_t Message_Block_Index; /* Message_Block array index */
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/* 1024-bit message blocks */
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uint8_t Message_Block[SHA512_Message_Block_Size];
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int Computed; /* Is the digest computed? */
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int Corrupted; /* Is the digest corrupted? */
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} SHA512Context;
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#if defined(USE_SHA224) && USE_SHA224
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/*
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* This structure will hold context information for the SHA-224
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* hashing operation. It uses the SHA-256 structure for computation.
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*/
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typedef struct SHA256Context SHA224Context;
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#endif
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#if defined(USE_SHA384_SHA512) && USE_SHA384_SHA512
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/*
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* This structure will hold context information for the SHA-384
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* hashing operation. It uses the SHA-512 structure for computation.
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*/
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typedef struct SHA512Context SHA384Context;
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#endif
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/*
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* This structure holds context information for all SHA
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* hashing operations.
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*/
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typedef struct USHAContext
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{
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SHAversion whichSha; /* which SHA is being used */
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union
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{
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#if defined(USE_SHA1) && USE_SHA1
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SHA1Context sha1Context;
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#endif
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#if defined(USE_SHA224) && USE_SHA224
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SHA224Context sha224Context;
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#endif
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SHA256Context sha256Context;
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#if defined(USE_SHA384_SHA512) && USE_SHA384_SHA512
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SHA384Context sha384Context;
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SHA512Context sha512Context;
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#endif
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} ctx;
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} USHAContext;
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/*
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* This structure will hold context information for the HMAC
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* keyed hashing operation.
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*/
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typedef struct HMACContext
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{
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SHAversion whichSha; /* which SHA is being used */
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int hashSize; /* hash size of SHA being used */
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int blockSize; /* block size of SHA being used */
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USHAContext shaContext; /* SHA context */
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unsigned char k_opad[USHA_Max_Message_Block_Size];
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/* outer padding - key XORd with opad */
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} HMACContext;
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/*
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* Function Prototypes
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*/
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#if defined(USE_SHA1) && USE_SHA1
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/* SHA-1 */
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extern int SHA1Reset (SHA1Context *);
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extern int SHA1Input (SHA1Context *, const uint8_t * bytes,
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size_t bytecount);
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extern int SHA1FinalBits (SHA1Context *, const uint8_t bits,
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size_t bitcount);
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extern int SHA1Result (SHA1Context *, uint8_t Message_Digest[SHA1HashSize]);
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#endif
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#if defined(USE_SHA224) && USE_SHA224
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/* SHA-224 */
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extern int SHA224Reset (SHA224Context *);
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extern int SHA224Input (SHA224Context *, const uint8_t * bytes,
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size_t bytecount);
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extern int SHA224FinalBits (SHA224Context *, const uint8_t bits,
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size_t bitcount);
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extern int SHA224Result (SHA224Context *,
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uint8_t Message_Digest[SHA224HashSize]);
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#endif
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/* SHA-256 */
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extern int SHA256Reset (SHA256Context *);
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extern int SHA256Input (SHA256Context *, const uint8_t * bytes,
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size_t bytecount);
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extern int SHA256FinalBits (SHA256Context *, const uint8_t bits,
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size_t bitcount);
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extern int SHA256Result (SHA256Context *,
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uint8_t Message_Digest[SHA256HashSize]);
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#if defined(USE_SHA384_SHA512) && USE_SHA384_SHA512
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/* SHA-384 */
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extern int SHA384Reset (SHA384Context *);
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extern int SHA384Input (SHA384Context *, const uint8_t * bytes,
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size_t bytecount);
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extern int SHA384FinalBits (SHA384Context *, const uint8_t bits,
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size_t bitcount);
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extern int SHA384Result (SHA384Context *,
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uint8_t Message_Digest[SHA384HashSize]);
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/* SHA-512 */
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extern int SHA512Reset (SHA512Context *);
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extern int SHA512Input (SHA512Context *, const uint8_t * bytes,
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size_t bytecount);
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extern int SHA512FinalBits (SHA512Context *, const uint8_t bits,
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size_t bitcount);
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extern int SHA512Result (SHA512Context *,
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uint8_t Message_Digest[SHA512HashSize]);
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#endif
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/* Unified SHA functions, chosen by whichSha */
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extern int USHAReset (USHAContext *, SHAversion whichSha);
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extern int USHAInput (USHAContext *,
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const uint8_t * bytes, size_t bytecount);
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extern int USHAFinalBits (USHAContext *,
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const uint8_t bits, size_t bitcount);
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extern int USHAResult (USHAContext *,
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uint8_t Message_Digest[USHAMaxHashSize]);
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extern int USHABlockSize (enum SHAversion whichSha);
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extern int USHAHashSize (enum SHAversion whichSha);
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extern int USHAHashSizeBits (enum SHAversion whichSha);
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/*
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* HMAC Keyed-Hashing for Message Authentication, RFC2104,
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* for all SHAs.
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* This interface allows a fixed-length text input to be used.
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*/
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extern int hmac (SHAversion whichSha, /* which SHA algorithm to use */
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const unsigned char *text, /* pointer to data stream */
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size_t text_len, /* length of data stream */
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const unsigned char *key, /* pointer to authentication key */
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size_t key_len, /* length of authentication key */
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uint8_t digest[USHAMaxHashSize]); /* caller digest to fill in */
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/*
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* HMAC Keyed-Hashing for Message Authentication, RFC2104,
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* for all SHAs.
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* This interface allows any length of text input to be used.
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*/
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extern int hmacReset (HMACContext * ctx, enum SHAversion whichSha,
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const unsigned char *key, size_t key_len);
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extern int hmacInput (HMACContext * ctx, const unsigned char *text,
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size_t text_len);
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extern int hmacFinalBits (HMACContext * ctx, const uint8_t bits,
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size_t bitcount);
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extern int hmacResult (HMACContext * ctx, uint8_t *digest);
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#endif /* _SHA_H_ */
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