Base64解密加密_lr base64编码

1. LoadRunner/C语言 实现：Base64加解码
   之前分享过一个LoadRunner执行Base64编码的函数，由于当时没有提供解码。如今又在网上重新收集了一套编解码的函数。
   在LoadRunner脚本里包含头文件即可使用，示例如下：
   #include “base64.h”

Action(){
int res;
// ENCODE
lr_save_string("testddd_001@dddd.cn:ttttt",“plain”);
b64_encode_string( lr_eval_string("{plain}"), “b64str” );
lr_output_message(“Encoded: %s”, lr_eval_string("{b64str}") );
// DECODE
b64_decode_string( lr_eval_string("{b64str}"), “plain2” );
lr_output_message(“Decoded: %s”, lr_eval_string("{plain2}") );
// Verify decoded matches original plain text
res = strcmp( lr_eval_string("{plain}"), lr_eval_string("{plain2}") );
if (res==0) lr_output_message(“Decoded matches original plain text”);

return 0 ;
}

文件base64.h源码如下：
//为LoadRunner提供Base64的编码和解码函数,
//有直接编码和解决的函数和输出LoadRunner参数的函数。

/*
Base 64 Encode and Decode functions for LoadRunner

===========================================
This include file provides functions to Encode and Decode
LoadRunner variables. It’s based on source codes found on the
internet and has been modified to work in LoadRunner.
Created by Kim Sandell / Celarius -www.celarius.com
*/
// Encoding lookup table
char base64encode_lut[] = {
‘A’,‘B’,‘C’,‘D’,‘E’,‘F’,‘G’,‘H’,‘I’,‘J’,‘K’,‘L’,‘M’,‘N’,‘O’,‘P’,‘Q’,
‘R’,‘S’,‘T’,‘U’,‘V’,‘W’,‘X’,‘Y’,‘Z’,‘a’,‘b’,‘c’,‘d’,‘e’,‘f’,‘g’,‘h’,
‘i’,‘j’,‘k’,‘l’,‘m’,‘n’,‘o’,‘p’,‘q’,‘r’,‘s’,‘t’,‘u’,‘v’,‘w’,‘x’,‘y’,
‘z’,‘0’,‘1’,‘2’,‘3’,‘4’,‘5’,‘6’,‘7’,‘8’,‘9’,’+’,’/’,’=’};
// Decode lookup table
char base64decode_lut[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,62, 0, 0, 0,63,52,53,54,55,56,57,58,59,60,61, 0, 0,
0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,
15,16,17,18,19,20,21,22,23,24,25, 0, 0, 0, 0, 0, 0,26,27,28,
29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,
49,50,51, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, };
void base64encode(char *src, char *dest, int len)
// Encodes a buffer to base64
{
int i=0, slen=strlen(src);
for(i=0;i<slen && i<len;i+=3,src+=3)
{ // Enc next 4 characters
*(dest++)=base64encode_lut[(*src&0xFC)>>0x2];
(dest++)=base64encode_lut[(src&0x3)<<0x4|((src+1)&0xF0)>>0x4];
(dest++)=((i+1)<slen)?base64encode_lut[((src+1)&0xF)<<0x2|((src+2)&0xC0)>>0x6]:’=’;
(dest++)=((i+2)<slen)?base64encode_lut[(src+2)&0x3F]:’=’;
}
*dest=’\0’; // Append terminator
}

void base64decode(char src, char dest, int len)
// Encodes a buffer to base64
{
int i=0, slen=strlen(src);
for(i=0;i<slen&&i<len;i+=4,src+=4)
{ // Store next 4 chars in vars for faster access
char c1=base64decode_lut[src], c2=base64decode_lut[(src+1)], c3=base64decode_lut[(src+2)], c4=base64decode_lut[(src+3)];
// Decode to 3 chars
*(dest++)=(c1&0x3F)<<0x2|(c2&0x30)>>0x4;
*(dest++)=(c3!=64)?((c2&0xF)<<0x4|(c3&0x3C)>>0x2):’\0’;
*(dest++)=(c4!=64)?((c3&0x3)<<0x6|c4&0x3F):’\0’;
}
*dest=’\0’; // Append terminator
}
int b64_encode_string( char *source, char *lrvar )
// ----------------------------------------------------------------------------
// Encodes a string to base64 format ----- Method 1
//
// Parameters:
// source Pointer to source string to encode
// lrvar LR variable where base64 encoded string is stored
//
// Example:
//
// b64_encode_string( “Encode Me!”, “b64” )
// ----------------------------------------------------------------------------
{
int dest_size;
int res;
char dest;
// Allocate dest buffer
dest_size = 1 + ((strlen(source)+2)/34);
dest = (char *)malloc(dest_size);
memset(dest,0,dest_size);
// Encode & Save
base64encode(source, dest, dest_size);
lr_save_string( dest, lrvar );
// Free dest buffer
res = strlen(dest);
free(dest);
// Return length of dest string
return res;
}

int b64_decode_string( char *source, char *lrvar )
// ----------------------------------------------------------------------------
// Decodes a base64 string to plaintext ----- Method 2
//
// Parameters:
// source Pointer to source base64 encoded string
// lrvar LR variable where decoded string is stored
//
// Example:
//
// b64_decode_string( lr_eval_string("{b64}"), “Plain” )
// ----------------------------------------------------------------------------
{
int dest_size;
int res;
char *dest;
// Allocate dest buffer
dest_size = strlen(source);
dest = (char *)malloc(dest_size);
memset(dest,0,dest_size);
// Encode & Save
base64decode(source, dest, dest_size);
lr_save_string( dest, lrvar );
// Free dest buffer
res = strlen(dest);
free(dest);
// Return length of dest string
return res;
}

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