src/crypto-sha1/rfc-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.cpp for more information.
  14  *
  15  */
  16
  17 #ifndef _SHA1_H_
  18 #define _SHA1_H_
  19
  20 #include <stdint.h>
  21 /*
  22  * If you do not have the ISO standard stdint.h header file, then you
  23  * must typdef the following:
  24  *    name              meaning
  25  *  uint32_t         unsigned 32 bit integer
  26  *  uint8_t          unsigned 8 bit integer (i.e., unsigned char)
  27  *  int_least16_t    integer of >= 16 bits
  28  *
  29  */
  30
  31 #ifndef _SHA_enum_
  32 #define _SHA_enum_
  33 enum
  34 {
  35     shaSuccess = 0,
  36     shaNull,            /* Null pointer parameter */
  37     shaInputTooLong,    /* input data too long */
  38     shaStateError       /* called Input after Result */
  39 };
  40 #endif
  41 #define SHA1HashSize 20
  42
  43 /*
  44  *  This structure will hold context information for the SHA-1
  45  *  hashing operation
  46  */
  47 typedef struct SHA1Context
  48 {
  49     uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest  */
  50
  51     uint32_t Length_Low;            /* Message length in bits      */
  52     uint32_t Length_High;           /* Message length in bits      */
  53
  54                                /* Index into message block array   */
  55     int_least16_t Message_Block_Index;
  56     uint8_t Message_Block[64];      /* 512-bit message blocks      */
  57
  58     int Computed;               /* Is the digest computed?         */
  59     int Corrupted;             /* Is the message digest corrupted? */
  60 } SHA1Context;
  61
  62 /*
  63  *  Function Prototypes
  64  */
  65
  66 int SHA1Reset(  SHA1Context *);
  67 int SHA1Input(  SHA1Context *,
  68                 const uint8_t *,
  69                 unsigned int);
  70 int SHA1Result( SHA1Context *,
  71                 uint8_t Message_Digest[SHA1HashSize]);
  72
  73 #endif