App encryption algorithm

PHP side

<?php
namespace App\controllers;
Use Yii\web\controller;
Class TestController extends Controller
{
Public Function Actionindex () {
return $this->get_real_ip ();
$time =time (). ' 000 ';
$ip = $this->get_real_ip ();
return $this->aes128encrypt (' e234242423 ', "timestamp=". $time. " &ip= ". $ip);
$sign =bin2hex ($this->aes128encrypt (' same as key characters in software background ', "timestamp=". $time. " &ip= ". $ip));
return $sign;
}

Public Function Aes128encrypt ($key, $data) {
$padding =-(strlen ($data)% 16);
$data. = Str_repeat (Chr ($padding), $padding);
$keySize = 16;
$ivSize = 16;
$rawKey = $key;
$genKeyData = ";
return MD5 (' Sdfsfs ', true);
return MD5 ($genKeyData. $rawKey, True);
Do
{
$genKeyData = $genKeyData. MD5 ($genKeyData. $rawKey, True);
} while (Strlen ($genKeyData) < ($keySize + $ivSize));
return $genKeyData;

$generatedKey = substr ($genKeyData, 0, $keySize);
$generatedIV = substr ($genKeyData, $keySize, $ivSize);
Return Mcrypt_encrypt (mcrypt_rijndael_128, $generatedKey, $data, MCRYPT_MODE_CBC, $generatedIV);
}

Public Function get_real_ip () {
$ip =false;
if (!empty ($_server["Http_client_ip")) {
$ip = $_server["Http_client_ip"];
}
if (!empty ($_server[' http_x_forwarded_for ')) {
$ips = Explode (",", $_server[' http_x_forwarded_for ');
if ($IP) {array_unshift ($ips, $ip); $ip = FALSE;}
for ($i = 0; $i < count ($ips); $i + +) {
if (!eregi ("^ (10|172\.16|192\.168) \.", $ips [$i])) {
$ip = $ips [$i];
Break
}
}
}
Return ($ip $ip: $_server[' remote_addr ');
}

}

iOS side

NSData *datavalue = [NSData datawithbytes:[value cstringusingencoding:nsutf8stringencoding] length:value.length];

int padding = 16-value.length%16;
Returns the value from the specified ASCII
NSString * Asciivalue = [NSData strchr:padding];

nsmutablestring * paddingstring = [nsmutablestring string];

for (int i=0; i<padding; i++) {
[Paddingstring Appendstring:asciivalue];
}

Encrypted data plus padding
NSString * datastring = [NSString stringwithformat:@ "%@%@", value,paddingstring];

NSLog (@ "%@", datastring);

int keySize = 16;
int ivsize = 16;
NSString * Rawkey = key;
nsmutablestring * Genkeydata = [nsmutablestring string];

do {

NSString *md5str = [NSString stringwithformat:@ "%@%@", Genkeydata,rawkey];

MD5 16-bit encryption
NSString *newmd5str = [NSData createmd5:md5str];

[Genkeydata APPENDSTRING:NEWMD5STR];

} while (Genkeydata.length < keySize + ivsize);

The most total encrypted keys and vectors
NSString *generatedkey = [Genkeydata substringwithrange:nsmakerange (0, keySize)];
NSString *generatediv = [Genkeydata substringwithrange:nsmakerange (KeySize, ivsize)];

Encryption
size_t buffersize = [DataValue length] + kCCBlockSizeAES128;
void *buffer = malloc (buffersize);
size_t numbytesencrypted = 0;
Cccryptorstatus cryptorstatus = Cccrypt (Kccencrypt, kCCAlgorithmAES128, kccoptionpkcs7padding,
(__bridge const void *) (Generatedkey), kCCKeySizeAES128,
(__bridge const void *) (Generatediv),
[DataValue bytes], [datavalue length],
Buffer, buffersize,
&numbytesencrypted);

if (Cryptorstatus = = kccsuccess) {
NSLog (@ "Success");
return [NSData Datawithbytesnocopy:buffer length:numbytesencrypted];
}else{
NSLog (@ "Error");
}

Free (buffer);
return nil;

App encryption algorithm