java C# objective-c通用AES对称加解密

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1.java

/**
 * AES加解密
 * 
 * @author talver
 */
public class Security {
	final static String AES_KEY = "Q*1_3@c!4kd^j&g%";

	/**
	 * AES加密
	 * 
	 * @param str
	 *            待加密字符串
	 * @return 加密后字符串
	 */
	public static String aesEncrypt(String str) {
		try {
			String password = AES_KEY;
			SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES");
			Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
			cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
			String strTmp = Base64.encodeToString(cipher.doFinal(str.getBytes()), Base64.DEFAULT);
			return strTmp;
		} catch (Exception e) {
			e.printStackTrace();
		}
		return str;
	}

	/**
	 * AES解密
	 * 
	 * @param str
	 *            待解密字符串
	 * @return 解密后字符串
	 */
	public static String aesDecrypt(String str) {
		try {
			String password = AES_KEY;
			SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES");
			Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
			cipher.init(Cipher.DECRYPT_MODE, skeySpec);
			String strTmp = new String(cipher.doFinal(Base64.decode(str, Base64.DEFAULT)));
			return strTmp;
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return str;
	}
}

2.C#

public class Security
    {
        const string AES_KEY = "Q*1_3@c!4kd^j&g%";

        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="str">待加密字符串</param>
        /// <returns>加密后字符串</returns>
        public static string AesEncrypt(string str)
        {
            try
            {
                string key = AES_KEY;
                //分组加密算法
                AesCryptoServiceProvider aes =new AesCryptoServiceProvider();
                byte[] inputByteArray = Encoding.UTF8.GetBytes(str);//得到需要加密的字节数组 
                //设置密钥及密钥向量
                aes.Key = Encoding.UTF8.GetBytes(key);
                //aes.IV = Encoding.UTF8.GetBytes(key);
                aes.Mode = CipherMode.ECB;
                aes.Padding = PaddingMode.PKCS7;
                byte[] cipherBytes = null;
                using (MemoryStream ms = new MemoryStream())
                {
                    using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
                    {
                        cs.Write(inputByteArray, 0, inputByteArray.Length);
                        cs.FlushFinalBlock();
                        cipherBytes = ms.ToArray();//得到加密后的字节数组
                        cs.Close();
                        ms.Close();
                    }
                }
                return Convert.ToBase64String(cipherBytes);
            }
            catch { }
            return str;
        }

        /// <summary>
        /// AES解密
        /// </summary>
        /// <param name="str">待解密字符串</param>
        /// <returns>解密后字符串</returns>
        public static string AesDecrypt(string str)
        {
            try
            {
                string key = AES_KEY;
                byte[] cipherText = Convert.FromBase64String(str);
                AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
                aes.Key = Encoding.UTF8.GetBytes(key);
                //aes.IV = Encoding.UTF8.GetBytes(key);
                aes.Mode = CipherMode.ECB;
                aes.Padding = PaddingMode.PKCS7;
                byte[] decryptBytes = new byte[cipherText.Length];
                using (MemoryStream ms = new MemoryStream(cipherText))
                {
                    using (CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Read))
                    {
                        cs.Read(decryptBytes, 0, decryptBytes.Length);
                        cs.Close();
                        ms.Close();
                    }
                }
                return Encoding.UTF8.GetString(decryptBytes).Replace("\0", "");   //将字符串后尾的'\0'去掉
            }
            catch { }
            return str;
        }
    }

3.objective-c

1）.h文件

#import <Foundation/Foundation.h>

@interface Security : NSObject
+(NSString*)AesEncrypt:(NSString*)str;
+(NSString*)AesDecrypt:(NSString*)str;
@end

2）.m文件

#import "Security.h"
#import <CommonCrypto/CommonCryptor.h>
static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
#define LocalStr_None @"" //空字符串

@implementation Security

/*
 * AES加密
 *
 */
+(NSString*)AesEncrypt:(NSString*)str{
    NSString *key=@"Q*1_3@c!4kd^j&g%"; // 密钥
    NSData *data=[str dataUsingEncoding:NSUTF8StringEncoding]; // 待加密字符转为NSData型
    char keyPtr[kCCKeySizeAES128 + 1];
    memset(keyPtr, 0, sizeof(keyPtr));
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    
    NSUInteger dataLength = [data length];
    size_t bufferSize = dataLength + kCCBlockSizeAES128;
    void *buffer = malloc(bufferSize);
    
    size_t numBytesCrypted = 0;
    CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt,
                                          kCCAlgorithmAES128,
                                          kCCOptionPKCS7Padding|kCCOptionPKCS7Padding,
                                          keyPtr,
                                          kCCBlockSizeAES128,
                                          nil,
                                          [data bytes],
                                          dataLength,
                                          buffer,
                                          bufferSize,
                                          &numBytesCrypted);
    if (cryptStatus == kCCSuccess) {
        NSData *resultData=[NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
        NSString *result =[self base64EncodedStringFrom:resultData];
        return result;
    }
    free(buffer);
    return str;
}

/*
 * AES解密
 *
 */
+(NSString*)AesDecrypt:(NSString*)str{
    NSString *key=@"Q*1_3@c!4kd^j&g%"; // 密钥
    NSData *data=[self dataWithBase64EncodedString:str]; // base4解码
    char keyPtr[kCCKeySizeAES128 + 1];
    memset(keyPtr, 0, sizeof(keyPtr));
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    
    NSUInteger dataLength = [data length];
    size_t bufferSize = dataLength + kCCBlockSizeAES128;
    void *buffer = malloc(bufferSize);
    
    size_t numBytesCrypted = 0;
    CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,
                                          kCCAlgorithmAES128,
                                          kCCOptionPKCS7Padding|kCCOptionPKCS7Padding,
                                          keyPtr,
                                          kCCBlockSizeAES128,
                                          nil,
                                          [data bytes],
                                          dataLength,
                                          buffer,
                                          bufferSize,
                                          &numBytesCrypted);
    if (cryptStatus == kCCSuccess) {
        NSData *resultData=[NSData dataWithBytesNoCopy:buffer length:numBytesCrypted];
        NSString *result =[[NSString alloc]initWithData:resultData encoding:NSUTF8StringEncoding];
        return result;
    }
    free(buffer);
    return str;
}


+ (NSString *)base64StringFromText:(NSString *)text
{
    if (text && ![text isEqualToString:LocalStr_None]) {
        NSData *data = [text dataUsingEncoding:NSUTF8StringEncoding];
        return [self base64EncodedStringFrom:data];
    }
    else {
        return LocalStr_None;
    }
}

+ (NSString *)textFromBase64String:(NSString *)base64
{
    if (base64 && ![base64 isEqualToString:LocalStr_None]) {
        NSData *data = [self dataWithBase64EncodedString:base64];
        return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    }
    else {
        return LocalStr_None;
    }
}

+ (NSData *)dataWithBase64EncodedString:(NSString *)string
{
    if (string == nil)
        [NSException raise:NSInvalidArgumentException format:nil];
    if ([string length] == 0)
        return [NSData data];
    
    static char *decodingTable = NULL;
    if (decodingTable == NULL)
    {
        decodingTable = malloc(256);
        if (decodingTable == NULL)
            return nil;
        memset(decodingTable, CHAR_MAX, 256);
        NSUInteger i;
        for (i = 0; i < 64; i++)
            decodingTable[(short)encodingTable[i]] = i;
    }
    
    const char *characters = [string cStringUsingEncoding:NSASCIIStringEncoding];
    if (characters == NULL)     //  Not an ASCII string!
        return nil;
    char *bytes = malloc((([string length] + 3) / 4) * 3);
    if (bytes == NULL)
        return nil;
    NSUInteger length = 0;
    
    NSUInteger i = 0;
    while (YES)
    {
        char buffer[4];
        short bufferLength;
        for (bufferLength = 0; bufferLength < 4; i++)
        {
            if (characters[i] == '\0')
                break;
            if (isspace(characters[i]) || characters[i] == '=')
                continue;
            buffer[bufferLength] = decodingTable[(short)characters[i]];
            if (buffer[bufferLength++] == CHAR_MAX)      //  Illegal character!
            {
                free(bytes);
                return nil;
            }
        }
        
        if (bufferLength == 0)
            break;
        if (bufferLength == 1)      //  At least two characters are needed to produce one byte!
        {
            free(bytes);
            return nil;
        }
        
        //  Decode the characters in the buffer to bytes.
        bytes[length++] = (buffer[0] << 2) | (buffer[1] >> 4);
        if (bufferLength > 2)
            bytes[length++] = (buffer[1] << 4) | (buffer[2] >> 2);
        if (bufferLength > 3)
            bytes[length++] = (buffer[2] << 6) | buffer[3];
    }
    
    bytes = realloc(bytes, length);
    return [NSData dataWithBytesNoCopy:bytes length:length];
}

+ (NSString *)base64EncodedStringFrom:(NSData *)data
{
    if ([data length] == 0)
        return @"";
    
    char *characters = malloc((([data length] + 2) / 3) * 4);
    if (characters == NULL)
        return nil;
    NSUInteger length = 0;
    
    NSUInteger i = 0;
    while (i < [data length])
    {
        char buffer[3] = {0,0,0};
        short bufferLength = 0;
        while (bufferLength < 3 && i < [data length])
            buffer[bufferLength++] = ((char *)[data bytes])[i++];
        
        //  Encode the bytes in the buffer to four characters, including padding "=" characters if necessary.
        characters[length++] = encodingTable[(buffer[0] & 0xFC) >> 2];
        characters[length++] = encodingTable[((buffer[0] & 0x03) << 4) | ((buffer[1] & 0xF0) >> 4)];
        if (bufferLength > 1)
            characters[length++] = encodingTable[((buffer[1] & 0x0F) << 2) | ((buffer[2] & 0xC0) >> 6)];
        else characters[length++] = '=';
        if (bufferLength > 2)
            characters[length++] = encodingTable[buffer[2] & 0x3F];
        else characters[length++] = '=';
    }
    
    return [[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSASCIIStringEncoding freeWhenDone:YES];
}

@end

4.源代码下载：http://download.youkuaiyun.com/detail/talver/7985063