C++加密解密php代码的方法

#include "php.h"#include "php_ini.h"#include "ext/standard/info.h"#include "string.h"char * key = "abcd";PHP_FUNCTION(encode){  long key_len = strlen(key);  char * code, * encode_code;  long code_len;  if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &code, &code_len) == FAILURE){    return;  }  encode_code = encode(code, code_len, key, key_len);  RETURN_STRING(encode_code, 0);}PHP_FUNCTION(decode){  long key_len = strlen(key);  char * code, * decode_code;  long code_len;  if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &code, &code_len) == FAILURE){    return;  }  decode_code = decode(code, code_len, key, key_len);  RETURN_STRING(decode_code, 0);}PHP_FUNCTION(run){  char * en_base64_code;  long en_base64_code_len;  char * decode_code;  long key_len = strlen(key);  char * eval_code;  char * str_name;  if(zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &en_base64_code, &en_base64_code_len) == FAILURE){    return;  }  str_name = zend_make_compiled_string_description("phpencoder" TSRMLS_CC);  decode_code = decode(en_base64_code, en_base64_code_len, key, key_len); //解码  spprintf(&eval_code, 0, " ?>%s<?php ", decode_code);  free(decode_code);  if(zend_eval_string(eval_code, NULL, str_name TSRMLS_CC) == FAILURE){ //解析失败    efree(str_name);    efree(eval_code);    php_error_docref(NULL TSRMLS_CC, E_RECOVERABLE_ERROR, "Please make sure '<?php' end with '?>'", PHP_EOL);    RETURN_FALSE;  }  efree(str_name);  efree(eval_code);  RETURN_TRUE;}inline char * encode(char * code, long code_len, char* key, long key_len){  char * code_encode;  int i;  long offset = 0, ret_len;  code_encode = strdup(code);  for(i =0; i<code_len; i++){    if(offset == key_len){      offset = 0;    }    * (code_encode + i) = * (code + i) ^ * (key + offset);    offset ++;  }  return php_base64_encode(code_encode, code_len, &ret_len); //base64 加密}inline char * decode(char * code,long code_len, char* key, long key_len){  char * code_decode;  char * nobase_code;  int i;  long offset = 0, ret_len;  zend_bool strict = 0;  code_decode = strdup(code);  nobase_code = php_base64_decode_ex((unsigned char*)code, code_len, &ret_len, strict); //解密，ret_len 返回长度  for(i =0; i<ret_len; i++){    if(offset == key_len){      offset = 0;    }    * (code_decode + i) = * (nobase_code + i) ^ * (key + offset);    offset ++;  }  * (code_decode + i) = '/0';  return code_decode;}