sha1.h

00001 /*
00002  *  sha1.h
00003  *
00004  *  Description:
00005  *      This is the header file for code which implements the Secure
00006  *      Hashing Algorithm 1 as defined in FIPS PUB 180-1 published
00007  *      April 17, 1995.
00008  *
00009  *      Many of the variable names in this code, especially the
00010  *      single character names, were used because those were the names
00011  *      used in the publication.
00012  *
00013  *      Please read the file sha1.c for more information.
00014  *
00015  */
00016 
00017 #ifndef _SHA1_H_
00018 #define _SHA1_H_
00019 
00020 #ifdef __cplusplus
00021 extern "C" {
00022 #endif
00023 
00024 //#include <stdint.h>
00025 typedef unsigned long uint32_t;
00026 typedef int int_least16_t;
00027 typedef unsigned char uint8_t;
00028 
00029 /*
00030  * If you do not have the ISO standard stdint.h header file, then you
00031  * must typdef the following:
00032  *    name              meaning
00033  *  uint32_t         unsigned 32 bit integer
00034  *  uint8_t          unsigned 8 bit integer (i.e., unsigned char)
00035  *  int_least16_t    integer of >= 16 bits
00036  *
00037  */
00038 
00039 #ifndef _SHA_enum_
00040 #define _SHA_enum_
00041 enum
00042 {
00043     shaSuccess = 0,
00044     shaNull,            /* Null pointer parameter */
00045     shaInputTooLong,    /* input data too long */
00046     shaStateError       /* called Input after Result */
00047 };
00048 #endif
00049 #define SHA1HashSize 20
00050 
00051 /*
00052  *  This structure will hold context information for the SHA-1
00053  *  hashing operation
00054  */
00055 typedef struct SHA1Context
00056 {
00057     uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest  */
00058 
00059     uint32_t Length_Low;            /* Message length in bits      */
00060     uint32_t Length_High;           /* Message length in bits      */
00061 
00062                                /* Index into message block array   */
00063     int_least16_t Message_Block_Index;
00064     uint8_t Message_Block[64];      /* 512-bit message blocks      */
00065 
00066     int Computed;               /* Is the digest computed?         */
00067     int Corrupted;             /* Is the message digest corrupted? */
00068 } SHA1Context;
00069 
00070 /*
00071  *  Function Prototypes
00072  */
00073 
00074 int SHA1Reset(  SHA1Context *);
00075 int SHA1Input(  SHA1Context *,
00076                 const uint8_t *,
00077                 unsigned int);
00078 int SHA1Result( SHA1Context *,
00079                 uint8_t Message_Digest[SHA1HashSize]);
00080 
00081 #ifdef __cplusplus
00082 }
00083 #endif
00084 
00085 #endif