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 00023 #if defined(__OpenBSD__) || defined( __FreeBSD__) 00024 #include <inttypes.h> 00025 #else 00026 #include <stdint.h> 00027 #endif 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 * 00036 */ 00037 00038 #ifndef _SHA_enum_ 00039 #define _SHA_enum_ 00040 enum 00041 { 00042 shaSuccess = 0, 00043 shaNull, /* Null pointer parameter */ 00044 shaInputTooLong, /* input data too long */ 00045 shaStateError /* called Input after Result */ 00046 }; 00047 #endif 00048 #define SHA1HashSize 20 00049 00050 /* 00051 * This structure will hold context information for the SHA-1 00052 * hashing operation 00053 */ 00054 typedef struct SHA1Context 00055 { 00056 uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest */ 00057 00058 uint32_t Length_Low; /* Message length in bits */ 00059 uint32_t Length_High; /* Message length in bits */ 00060 00061 /* Index into message block array */ 00062 uint32_t Message_Block_Index; /* 8 bits actually suffice */ 00063 uint8_t Message_Block[64]; /* 512-bit message blocks */ 00064 00065 int Computed; /* Is the digest computed? */ 00066 int Corrupted; /* Is the message digest corrupted? */ 00067 } SHA1Context; 00068 00069 /* 00070 * Function Prototypes 00071 */ 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 #endif