小编Pet*_*ter的帖子

我正在为iOS实现一些解密代码,用于源自我无法控制的服务器上的消息.所以解密要求是:

Cipher Method : AES256
Cipher Mode: ECB
Padding: PKCS5Padding

由于我最初的试验未能解密.所以我玩了一些测试向量,看看我使用的代码是对的,

这是加密数据的代码:

NSString+AESCrypt.h
-------------------
#import <Foundation/Foundation.h>
#import "NSData+AESCrypt.h"

@interface NSString (AESCrypt)

- (NSString *)AES256EncryptWithKey:(NSString *)key;
- (NSString *)AES256DecryptWithKey:(NSString *)key;

@end


NSString+AESCrypt.m
-------------------
#import "NSString+AESCrypt.h"

@implementation NSString (AESCrypt)

- (NSString *)AES256EncryptWithKey:(NSString *)key
{
   NSData *plainData = [self dataUsingEncoding:NSUTF8StringEncoding];
   NSData *encryptedData = [plainData AES256EncryptWithKey:key];

   NSString *encryptedString = [encryptedData base64Encoding];

   return encryptedString;
}

- (NSString *)AES256DecryptWithKey:(NSString *)key
{
   NSData *encryptedData = [NSData dataWithBase64EncodedString:self];
   NSData *plainData = [encryptedData AES256DecryptWithKey:key];

   NSString *plainString = …