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 00018 #ifndef _SHA1_H_ 00019 #define _SHA1_H_ 00020 00021 /* 00022 * We assume that the standard asterisk headers have been included before this one. 00023 * If you do not have the ISO standard stdint.h header file, then you 00024 * must typdef the following: 00025 * name meaning 00026 * uint32_t unsigned 32 bit integer 00027 * uint8_t unsigned 8 bit integer (i.e., unsigned char) 00028 * 00029 */ 00030 00031 #ifndef _SHA_enum_ 00032 #define _SHA_enum_ 00033 enum 00034 { 00035 shaSuccess = 0, 00036 shaNull, /* Null pointer parameter */ 00037 shaInputTooLong, /* input data too long */ 00038 shaStateError /* called Input after Result */ 00039 }; 00040 #endif 00041 #define SHA1HashSize 20 00042 00043 /*! 00044 * \brief This structure will hold context information for the SHA-1 hashing operation 00045 */ 00046 typedef struct SHA1Context 00047 { 00048 uint32_t Intermediate_Hash[SHA1HashSize/4]; /*! Message Digest */ 00049 00050 uint32_t Length_Low; /*!< Message length in bits */ 00051 uint32_t Length_High; /*!< Message length in bits */ 00052 00053 /* Index into message block array */ 00054 uint32_t Message_Block_Index; /*!< 8 bits actually suffice */ 00055 uint8_t Message_Block[64]; /*!< 512-bit message blocks */ 00056 00057 int Computed; /*!< Is the digest computed? */ 00058 int Corrupted; /*!< Is the message digest corrupted? */ 00059 } SHA1Context; 00060 00061 /* 00062 * Function Prototypes 00063 */ 00064 00065 00066 int SHA1Reset( SHA1Context *); 00067 int SHA1Input( SHA1Context *, 00068 const uint8_t *, 00069 unsigned int); 00070 int SHA1Result( SHA1Context *, 00071 uint8_t Message_Digest[SHA1HashSize]); 00072 00073 #endif