74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* sha1.h
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*
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* Description:
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* This is the header file for code which implements the Secure
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* Hashing Algorithm 1 as defined in FIPS PUB 180-1 published
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* April 17, 1995.
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*
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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 names
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* used in the publication.
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*
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* Please read the file sha1.c for more information.
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*
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*/
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#ifndef _SHA1_H_
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#define _SHA1_H_
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/*
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* We assume that the standard asterisk headers have been included before this one.
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* If you do not have the ISO standard stdint.h header file, then you
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* must typdef the following:
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* name meaning
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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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*
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*/
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#ifndef _SHA_enum_
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#define _SHA_enum_
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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 Result */
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};
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#endif
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#define SHA1HashSize 20
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/*!
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* \brief This structure will hold context information for the SHA-1 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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/* Index into message block array */
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uint32_t Message_Block_Index; /*!< 8 bits actually suffice */
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uint8_t Message_Block[64]; /*!< 512-bit message blocks */
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int Computed; /*!< Is the digest computed? */
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int Corrupted; /*!< Is the message digest corrupted? */
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} SHA1Context;
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/*
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* Function Prototypes
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*/
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int SHA1Reset( SHA1Context *);
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int SHA1Input( SHA1Context *,
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const uint8_t *,
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unsigned int);
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int SHA1Result( SHA1Context *,
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uint8_t Message_Digest[SHA1HashSize]);
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#endif
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