为了保护存储文件不被无聊的吊丝破解，对存储文件里一些明感数据加密还是必须的。
之前自己参考资料写了个Base64，没调试通，死于胎腹。之后在网上找到个GTMBase64，Google Toolbox for Mac。
EncryptUtil.h
1 // 2 // EncryptUtil.h 3 // 4 // Created by Wu Kurodo on 12-6-27. 5 // Copyright (c) 2012年 Kurodo Inc. All rights reserved. 6 // 7 8 #import <Foundation/Foundation.h> 9 10 @interface EncryptUtil : NSObject 11 12 + (NSString *)encryptWithText:(NSString *)sText; 13 + (NSString *)decryptWithText:(NSString *)sText; 14 15 @end
EncryptUtil.m
// // EncryptUtil.m // // Created by Wu Kurodo on 12-6-27. // Copyright (c) 2012年 Kurodo Inc. All rights reserved. // #import " EncryptUtil.h " #import <CommonCrypto/CommonCryptor.h> #import " GTMBase64.h " @implementation EncryptUtil + (NSString *)encrypt:(NSString *)sText encryptOrDecrypt:(CCOperation)encryptOperation key:(NSString *)key { const void *vplainText; size_t plainTextBufferSize; if (encryptOperation == kCCDecrypt) { NSData *decryptData = [GTMBase64 decodeData:[sText dataUsingEncoding:NSUTF8StringEncoding]]; plainTextBufferSize = [decryptData length]; vplainText = [decryptData bytes]; } else { NSData* encryptData = [sText dataUsingEncoding:NSUTF8StringEncoding]; plainTextBufferSize = [encryptData length]; vplainText = ( const void *)[encryptData bytes]; } CCCryptorStatus ccStatus; uint8_t *bufferPtr = NULL; size_t bufferPtrSize = 0; size_t movedBytes = 0; bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1); bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t)); memset(( void *)bufferPtr, 0x0, bufferPtrSize); NSString *initVec = @" init Kurodo "; const void *vkey = ( const void *) [key UTF8String]; const void *vinitVec = ( const void *) [initVec UTF8String]; ccStatus = CCCrypt(encryptOperation, kCCAlgorithm3DES, kCCOptionPKCS7Padding, vkey, kCCKeySize3DES, vinitVec, vplainText, plainTextBufferSize, ( void *)bufferPtr, bufferPtrSize, &movedBytes); NSString *result = nil; if (encryptOperation == kCCDecrypt) { result = [[[NSString alloc] initWithData:[NSData dataWithBytes:( const void *)bufferPtr length:(NSUInteger)movedBytes] encoding:NSUTF8StringEncoding] autorelease]; } else { NSData *data = [NSData dataWithBytes:( const void *)bufferPtr length:(NSUInteger)movedBytes]; result = [GTMBase64 stringByEncodingData:data]; } return result; } + (NSString *)encryptWithText:(NSString *)sText { return [self encrypt:sText encryptOrDecrypt:kCCEncrypt key: @" Kurodo "]; } + (NSString *)decryptWithText:(NSString *)sText { return [self encrypt:sText encryptOrDecrypt:kCCDecrypt key: @" Kurodo "]; } @end
效果如下
转载于:https://www.cnblogs.com/Kurodo/archive/2012/06/28/2567362.html
相关资源：Base64 DES加密