因为要做关于硬件设备的开发所以需要加密运算
这里面加密运算和其它的区别是不需要BASE64转码还有在解密的时候不用kCCOptionPKCS7Padding因为会发生部分数据无法解开
+(NSMutableData*) encryptUseDES:(NSMutableData*)plainText key:(NSMutableData*)key
{
NSString*ciphertext =nil;
NSMutableData*textData = [[NSMutableDataalloc]initWithData:plainText];
NSIntegera =8;
NSIntegerb = textData.length%a;
NSIntegerc = a-b;
if(b!=0) {
for(inti =0; i
{
NSString*string =@"00";
NSMutableData*data = [AES128dataWithHexString:string];
[textDataappendData:data];
}
}
NSUIntegerdataLength = [textDatalength];
unsignedcharbuffer[1024];
memset(buffer,0,sizeof(char));
size_tnumBytesEncrypted =0;
constvoid*keyvoid = (constvoid*)[keybytes];
CCCryptorStatuscryptStatus =CCCrypt(kCCEncrypt,kCCAlgorithmDES,
kCCOptionPKCS7Padding|kCCOptionECBMode,
keyvoid,kCCKeySizeDES,iv,
[textDatabytes], dataLength,
buffer,1024,
&numBytesEncrypted);
if(cryptStatus ==kCCSuccess) {
NSMutableData*data = [NSMutableDatadataWithBytes:bufferlength:(NSUInteger)dataLength];
returndata;
}
returnnil;
}
+(NSMutableData*) decryptUseDES:(NSMutableData*)cipherText key:(NSMutableData*)key
{
NSData* cipherData = [[NSDataalloc]initWithData:cipherText];
unsignedcharbuffer[1024];
memset(buffer,0,sizeof(char));
size_tnumBytesDecrypted =0;
Byteiv[] = {1,2,3,4,5,6,7,8};
constvoid*keyvoid = (constvoid*)[keybytes];
CCCryptorStatuscryptStatus =CCCrypt(kCCDecrypt,
kCCAlgorithmDES,
kCCOptionECBMode,
keyvoid,
kCCKeySizeDES,
iv,
[cipherDatabytes],
[cipherDatalength],
buffer,
1024,
&numBytesDecrypted);
NSString* plainText =nil;
if(cryptStatus ==kCCSuccess) {
NSMutableData* data = [NSMutableDatadataWithBytes:bufferlength:(NSUInteger)cipherText.length];
// NSLog(@"DES%@",data);
returndata;
}
returnnil;
}
