sha1.h

   1 /*
   2  *  sha1.h
   3  *
   4  *  Description:
   5  *      This is the header file for code which implements the Secure
   6  *      Hashing Algorithm 1 as defined in FIPS PUB 180-1 published
   7  *      April 17, 1995.
   8  *
   9  *      Many of the variable names in this code, especially the
  10  *      single character names, were used because those were the names
  11  *      used in the publication.
  12  *
  13  *      Please read the file sha1.c for more information.
  14  *
  15  */
  16
  17 #ifndef _SHA1_H_
  18 #define _SHA1_H_
  19
  20 #include <stdint.h>
  21
  22 #ifndef _SHA_enum_
  23 #define _SHA_enum_
  24 enum
  25 {
  26     shaSuccess = 0,
  27     shaNull,            /* Null pointer parameter */
  28     shaInputTooLong,    /* input data too long */
  29     shaStateError       /* called Input after Result */
  30 };
  31 #endif
  32 #define SHA1HashSize 20
  33
  34 /*
  35  *  This structure will hold context information for the SHA-1
  36  *  hashing operation
  37  */
  38 typedef struct SHA1Context
  39 {
  40     uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest  */
  41
  42     uint32_t Length_Low;            /* Message length in bits      */
  43     uint32_t Length_High;           /* Message length in bits      */
  44
  45                                /* Index into message block array   */
  46     int_least16_t Message_Block_Index;
  47     uint8_t Message_Block[64];      /* 512-bit message blocks      */
  48
  49     int Computed;               /* Is the digest computed?         */
  50     int Corrupted;             /* Is the message digest corrupted? */
  51 } SHA1Context;
  52
  53 /*
  54  *  Function Prototypes
  55  */
  56
  57 int SHA1Reset(  SHA1Context *);
  58 int SHA1Input(  SHA1Context *,
  59                 const uint8_t *,
  60                 unsigned int);
  61 int SHA1Result( SHA1Context *,
  62                 uint8_t Message_Digest[SHA1HashSize]);
  63
  64 #endif