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// CryptorTools.m
// 加密/解密工具
//
// Created by Erma on 15/4/26.
// Copyright (c) 2015年 Erma. All rights reserved.
//
#import "CryptorTools.h"
#import <CommonCrypto/CommonCrypto.h>
// 填充模式
#define kTypeOfWrapPadding kSecPaddingPKCS1
@interface CryptorTools() {
SecKeyRef _publicKeyRef; // 公钥引用
SecKeyRef _privateKeyRef; // 私钥引用
}
@end
@implementation CryptorTools
#pragma mark - DES 加密/解密
#pragma mark 加密
+ (NSData *)DESEncryptData:(NSData *)data keyString:(NSString *)keyString iv:(NSData *)iv {
return [self CCCryptData:data algorithm:kCCAlgorithmDES operation:kCCEncrypt keyString:keyString iv:iv];
}
+ (NSString *)DESEncryptString:(NSString *)string keyString:(NSString *)keyString iv:(NSData *)iv {
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
NSData *result = [self DESEncryptData:data keyString:keyString iv:iv];
// BASE 64 编码
return [result base64EncodedStringWithOptions:0];
}
#pragma mark 解密
+ (NSData *)DESDecryptData:(NSData *)data keyString:(NSString *)keyString iv:(NSData *)iv {
return [self CCCryptData:data algorithm:kCCAlgorithmDES operation:kCCDecrypt keyString:keyString iv:iv];
}
+ (NSString *)DESDecryptString:(NSString *)string keyString:(NSString *)keyString iv:(NSData *)iv {
// BASE 64 解码
NSData *data = [[NSData alloc] initWithBase64EncodedString:string options:0];
NSData *result = [self DESDecryptData:data keyString:keyString iv:iv];
return [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];
}
#pragma mark - AES 加密/解密
#pragma mark 加密
+ (NSData *)AESEncryptData:(NSData *)data keyString:(NSString *)keyString iv:(NSData *)iv {
return [self CCCryptData:data algorithm:kCCAlgorithmAES operation:kCCEncrypt keyString:keyString iv:iv];
}
+ (NSString *)AESEncryptString:(NSString *)string keyString:(NSString *)keyString iv:(NSData *)iv {
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
NSData *result = [self AESEncryptData:data keyString:keyString iv:iv];
// BASE 64 编码
return [result base64EncodedStringWithOptions:0];
}
#pragma mark 解密
+ (NSData *)AESDecryptData:(NSData *)data keyString:(NSString *)keyString iv:(NSData *)iv {
return [self CCCryptData:data algorithm:kCCAlgorithmAES operation:kCCDecrypt keyString:keyString iv:iv];
}
+ (NSString *)AESDecryptString:(NSString *)string keyString:(NSString *)keyString iv:(NSData *)iv {
// BASE 64 解码
NSData *data = [[NSData alloc] initWithBase64EncodedString:string options:0];
NSData *result = [self AESDecryptData:data keyString:keyString iv:iv];
return [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];
}
#pragma mark 对称加密&解密核心方法
/// 对称加密&解密核心方法
///
/// @param data 加密/解密的二进制数据
/// @param algorithm 加密算法
/// @param operation 加密/解密操作
/// @param keyString 密钥字符串
/// @param iv IV 向量
///
/// @return 加密/解密结果
+ (NSData *)CCCryptData:(NSData *)data algorithm:(CCAlgorithm)algorithm operation:(CCOperation)operation keyString:(NSString *)keyString iv:(NSData *)iv {
int keySize = (algorithm == kCCAlgorithmAES) ? kCCKeySizeAES128 : kCCKeySizeDES;
int blockSize = (algorithm == kCCAlgorithmAES) ? kCCBlockSizeAES128: kCCBlockSizeDES;
// 设置密钥
NSData *keyData = [keyString dataUsingEncoding:NSUTF8StringEncoding];
uint8_t cKey[keySize];
bzero(cKey, sizeof(cKey));
[key |