LoadRunner C language to implement SHA1 encryption

Source: Internet
Author: User
Tags sha1 sha1 encryption

//sha1.h: Sha1 encryption of the string


#ifndef _SHA1_H_


#define _SHA1_H_


typedef struct SHA1Context {


unsigned Message_Digest [5];


unsigned Length_Low;


unsigned Length_High;


unsigned char Message_Block [64];


int Message_Block_Index;


int Computed;


int Corrupted;


} SHA1Context;




void SHA1Reset (SHA1Context *);


int SHA1Result (SHA1Context *);


void SHA1Input (SHA1Context *, const char *, unsigned);


#endif






#define SHA1CircularShift (bits, word) ((((word) << (bits)) & 0xFFFFFFFF) | ((word) >> (32- (bits))))




void SHA1ProcessMessageBlock (SHA1Context *);


void SHA1PadMessage (SHA1Context *);




void SHA1Reset (SHA1Context * context) {// initialization action


context-> Length_Low = 0;


context-> Length_High = 0;


context-> Message_Block_Index = 0;




context-> Message_Digest [0] = 0x67452301;


context-> Message_Digest [1] = 0xEFCDAB89;


context-> Message_Digest [2] = 0x98BADCFE;


context-> Message_Digest [3] = 0x10325476;


context-> Message_Digest [4] = 0xC3D2E1F0;




context-> Computed = 0;


context-> Corrupted = 0;


}






int SHA1Result (SHA1Context * context) {// Returns 1 on success, 0 on failure


if (context-> Corrupted) {


return 0;


}


if (! context-> Computed) {


SHA1PadMessage (context);


context-> Computed = 1;


}


return 1;


}






void SHA1Input (SHA1Context * context, const char * message_array, unsigned length) {


if (! length) return;




if (context-> Computed || context-> Corrupted) {


context-> Corrupted = 1;


return;


}




while (length-- &&! context-> Corrupted) {


context-> Message_Block [context-> Message_Block_Index ++] = (* message_array & 0xFF);




context-> Length_Low + = 8;




context-> Length_Low & = 0xFFFFFFFF;


if (context-> Length_Low == 0) {


context-> Length_High ++;


context-> Length_High & = 0xFFFFFFFF;


if (context-> Length_High == 0) context-> Corrupted = 1;


}




if (context-> Message_Block_Index == 64) {


SHA1ProcessMessageBlock (context);


}


message_array ++;


}


}




void SHA1ProcessMessageBlock (SHA1Context * context) {


const unsigned K [] = {0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6};


int t;


unsigned temp;


unsigned W [80];


unsigned A, B, C, D, E;




for (t = 0; t <16; t ++) {


W [t] = ((unsigned) context-> Message_Block [t * 4]) << 24;


W [t] | = ((unsigned) context-> Message_Block [t * 4 + 1]) << 16;


W [t] | = ((unsigned) context-> Message_Block [t * 4 + 2]) << 8;


W [t] | = ((unsigned) context-> Message_Block [t * 4 + 3]);


}


Ranch


for (t = 16; t <80; t ++) W [t] = SHA1CircularShift (1, W [t-3] ^ W [t-8] ^ W [t-14] ^ W [t-16]);




A = context-> Message_Digest [0];


B = context-> Message_Digest [1];


C = context-> Message_Digest [2];


D = context-> Message_Digest [3];


E = context-> Message_Digest [4];




for (t = 0; t <20; t ++) {


temp = SHA1CircularShift (5, A) + ((B & C) | ((~ B) & D)) + E + W [t] + K [0];


temp & = 0xFFFFFFFF;


E = D;


D = C;


C = SHA1CircularShift (30, B);


B = A;


A = temp;


}


for (t = 20; t <40; t ++) {


temp = SHA1CircularShift (5, A) + (B ^ C ^ D) + E + W [t] + K [1];


temp & = 0xFFFFFFFF;


E = D;


D = C;


C = SHA1CircularShift (30, B);


B = A;


A = temp;


}


for (t = 40; t <60; t ++) {


temp = SHA1CircularShift (5, A) + ((B & C) | (B & D) | (C & D)) + E + W [t] + K [2];


temp & = 0xFFFFFFFF;


E = D;


D = C;


C = SHA1CircularShift (30, B);


B = A;


A = temp;


}


for (t = 60; t <80; t ++) {


temp = SHA1CircularShift (5, A) + (B ^ C ^ D) + E + W [t] + K [3];


temp & = 0xFFFFFFFF;


E = D;


D = C;


C = SHA1CircularShift (30, B);


B = A;


A = temp;


}


context-> Message_Digest [0] = (context-> Message_Digest [0] + A) & 0xFFFFFFFF;


context-> Message_Digest [1] = (context-> Message_Digest [1] + B) & 0xFFFFFFFF;


context-> Message_Digest [2] = (context-> Message_Digest [2] + C) & 0xFFFFFFFF;


context-> Message_Digest [3] = (context-> Message_Digest [3] + D) & 0xFFFFFFFF;


context-> Message_Digest [4] = (context-> Message_Digest [4] + E) & 0xFFFFFFFF;


context-> Message_Block_Index = 0;


}




void SHA1PadMessage (SHA1Context * context) {


if (context-> Message_Block_Index> 55) {


context-> Message_Block [context-> Message_Block_Index ++] = 0x80;


while (context-> Message_Block_Index <64) context-> Message_Block [context-> Message_Block_Index ++] = 0;


SHA1ProcessMessageBlock (context);


while (context-> Message_Block_Index <56) context-> Message_Block [context-> Message_Block_Index ++] = 0;


} else {


context-> Message_Block [context-> Message_Block_Index ++] = 0x80;


while (context-> Message_Block_Index <56) context-> Message_Block [context-> Message_Block_Index ++] = 0;


}


context-> Message_Block [56] = (context-> Length_High >> 24) & 0xFF;


context-> Message_Block [57] = (context-> Length_High >> 16) & 0xFF;


context-> Message_Block [58] = (context-> Length_High >> 8) & 0xFF;


context-> Message_Block [59] = (context-> Length_High) & 0xFF;


context-> Message_Block [60] = (context-> Length_Low >> 24) & 0xFF;


context-> Message_Block [61] = (context-> Length_Low >> 16) & 0xFF;


context-> Message_Block [62] = (context-> Length_Low >> 8) & 0xFF;


context-> Message_Block [63] = (context-> Length_Low) & 0xFF;




SHA1ProcessMessageBlock (context);


}




int sha1_hash (const char * source, char * lrvar) {// Main


SHA1Context sha;


char buf [128];




SHA1Reset (& sha);


SHA1Input (& sha, source, strlen (source));




if (! SHA1Result (& sha)) {


lr_error_message ("SHA1 ERROR: Could not compute message digest");


return -1;


} else {


memset (buf, 0, sizeof (buf));


sprintf (buf, "% 08X% 08X% 08X% 08X% 08X", sha.Message_Digest [0], sha.Message_Digest [1],


sha.Message_Digest [2], sha.Message_Digest [3], sha.Message_Digest [4]);


lr_save_string (buf, lrvar);


return strlen (buf);


}


}


 Save the above source code as sha1.h, and call it in LoadRunner as follows: #include "sha1.h"




Action ()


{


     sha1_hash ("Hello higkoo.", "SHA1");


     lr_output_message ("SHA1 encryption result: \ n Notify: \ t% s", lr_eval_string ("{SHA1}"));


     return 0;


} Operation result: Notify: 5B725E51D7EC7765BADA4A0EE3CCB52649EBE6AE



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