objective c encrypt decrypt string
NSString *const IV = @"AEE0515D0B08A4E4";
NSString *const KEY = @"9336565521E5F082BB5929E8E033BC69";
#import "SecurityUtils.h"
@implementation SecurityUtils
+ (NSString *)encrypt:(NSString *)plainText error:(NSError **)error {
NSMutableData *result = [SecurityUtils doAES:[plainText dataUsingEncoding:NSUTF8StringEncoding] context: kCCEncrypt error:error];
return [result base64EncodedStringWithOptions:0];
}
+ (NSString *)decrypt:(NSString *)encryptedBase64String error:(NSError **)error {
NSData *dataToDecrypt = [[NSData alloc] initWithBase64EncodedString:encryptedBase64String options:0];
NSMutableData *result = [SecurityUtils doAES:dataToDecrypt context: kCCDecrypt error:error];
return [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];
}
+ (NSMutableData *)doAES:(NSData *)dataIn context:(CCOperation)kCCEncrypt_or_kCCDecrypt error:(NSError **)error {
CCCryptorStatus ccStatus = kCCSuccess;
size_t cryptBytes = 0;
NSMutableData *dataOut = [NSMutableData dataWithLength:dataIn.length + kCCBlockSizeBlowfish];
NSData *key =[KEY dataUsingEncoding:NSUTF8StringEncoding];
NSData *iv = [IV dataUsingEncoding:NSUTF8StringEncoding];
ccStatus = CCCrypt( kCCEncrypt_or_kCCDecrypt,
kCCAlgorithmAES,
kCCOptionPKCS7Padding,
key.bytes,
key.length,
(iv)?nil:iv.bytes,
dataIn.bytes,
dataIn.length,
dataOut.mutableBytes,
dataOut.length,
&cryptBytes);
if (ccStatus == kCCSuccess) {
dataOut.length = cryptBytes;
}
else {
if (error) {
*error = [NSError errorWithDomain:@"kEncryptionError"
code:ccStatus
userInfo:nil];
}
dataOut = nil;
}
return dataOut;
}
@end