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74 lines
1.8 KiB
C
74 lines
1.8 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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#ifdef __cplusplus
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extern "C" {
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#endif
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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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/*
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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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unsigned long Intermediate_Hash[20/4]; /* Message Digest */
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unsigned long Length_Low; /* Message length in bits */
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unsigned long Length_High; /* Message length in bits */
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int Message_Block_Index; /* Index into message block array */
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unsigned char 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 unsigned char *,
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unsigned int);
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int SHA1Result( SHA1Context *,
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unsigned char Message_Digest[20]);
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#if defined( SHA1_TEST )
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int SHA1Test( );
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#endif // SHA1_TEST
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#ifdef __cplusplus
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}
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#endif
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#endif // _SHA1_H_
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