Objective-C 与JAVA的SHA1/HmacSHA1加密算法实现

最近研究IOS手机上登录的功能。由于加密方式使用SHA1算法。网上也没找到直接的例子，最终参照StackoverFlow上的大神，完成了加密实现。

先上代码：

//HmacSHA1加密；
+(NSString *)HmacSha1:(NSString *)key data:(NSString *)data
{
    const char *cKey  = [key cStringUsingEncoding:NSASCIIStringEncoding];
    const char *cData = [data cStringUsingEncoding:NSASCIIStringEncoding];
    //Sha256:
    // unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH];
    //CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC);

    //sha1
    unsigned char cHMAC[CC_SHA1_DIGEST_LENGTH];
    CCHmac(kCCHmacAlgSHA1, cKey, strlen(cKey), cData, strlen(cData), cHMAC);

    NSData *HMAC = [[NSData alloc] initWithBytes:cHMAC
                                          length:sizeof(cHMAC)];

    NSString *hash = [HMAC base64EncodedStringWithOptions:0];//将加密结果进行一次BASE64编码。
    return hash;
}

//密码加密方式：SHA1
+(NSString *)EncriptPassword_SHA1:(NSString *)password{
    const char *cstr = [password cStringUsingEncoding:NSUTF8StringEncoding];
    NSData *data = [NSData dataWithBytes:cstr length:password.length];
    uint8_t digest[CC_SHA1_DIGEST_LENGTH];
    CC_SHA1(data.bytes, data.length, digest);

    NSMutableString* result = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH *2];

    for(int i =0; i < CC_SHA1_DIGEST_LENGTH; i++) {
        [result appendFormat:@"%02x", digest[i]];
    }

    return [result uppercaseString];
}

由于Android版本也用到，附上JAVA版本代码：

1.HmacSHA1:

 SecretKeySpec localSecretKeySpec = new SecretKeySpec(mySecretKey.getBytes("UTF-8"), "HmacSHA1");//加密密钥
 Mac localMac = Mac.getInstance("HmacSHA1");
 localMac.init(localSecretKeySpec);
 localMac.update(myDate.getBytes("UTF-8"));//加密内容，这里使用时间
 String result = Base64.encodeToString(localMac.doFinal(), 0).trim(); //获取加密结果并转BASE64

2:直接SHA1

  public static String authPassword(String paramString)
      {
        try
        {
          MessageDigest localMessageDigest = MessageDigest.getInstance("SHA1");
          localMessageDigest.update(paramString.getBytes());
          String str = bytes2Hex(localMessageDigest.digest()).toUpperCase();
          return str;
        }
        catch (NoSuchAlgorithmException localNoSuchAlgorithmException)
        {
        }
        return "";
      }

      public static String bytes2Hex(byte[] paramArrayOfByte)
      {
        String str1 = "";
        for (int i = 0; ; i++)
        {
          if (i >= paramArrayOfByte.length)
            return str1;
          String str2 = Integer.toHexString(0xFF & paramArrayOfByte[i]);
          if (str2.length() == 1)
            str1 = str1 + "0";
          str1 = str1 + str2;
        }
      }