/// <summary>
///
/// </summary>
public static class StringExtentions
{
/// <summary>
/// 转换为MD5加密后的字符串（默认加密为32位）
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string ToMD5String(this string str)
{
MD5 md5 = MD5.Create();
byte[] inputBytes = Encoding.UTF8.GetBytes(str);
byte[] hashBytes = md5.ComputeHash(inputBytes);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < hashBytes.Length; i++)
{
sb.Append(hashBytes[i].ToString("x2"));
}
md5.Dispose();
return sb.ToString();
}
/// <summary>
/// 转换为MD5加密后的字符串（16位）
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string ToMD5String16(this string str)
{
return str.ToMD5String().Substring(8, 16);
}
/// <summary>
/// Base64加密
/// 注:默认采用UTF8编码
/// </summary>
/// <param name="source">待加密的明文</param>
/// <returns>加密后的字符串</returns>
public static string Base64Encode(this string source)
{
return Base64Encode(source, Encoding.UTF8);
}
/// <summary>
/// Base64加密
/// </summary>
/// <param name="source">待加密的明文</param>
/// <param name="encoding">加密采用的编码方式</param>
/// <returns></returns>
public static string Base64Encode(this string source, Encoding encoding)
{
string encode = string.Empty;
byte[] bytes = encoding.GetBytes(source);
try
{
encode = Convert.ToBase64String(bytes);
}
catch
{
encode = source;
}
return encode;
}
/// <summary>
/// Base64解密
/// 注:默认使用UTF8编码
/// </summary>
/// <param name="result">待解密的密文</param>
/// <returns>解密后的字符串</returns>
public static string Base64Decode(this string result)
{
return Base64Decode(result, Encoding.UTF8);
}
/// <summary>
/// Base64解密
/// </summary>
/// <param name="result">待解密的密文</param>
/// <param name="encoding">解密采用的编码方式，注意和加密时采用的方式一致</param>
/// <returns>解密后的字符串</returns>
public static string Base64Decode(this string result, Encoding encoding)
{
string decode = string.Empty;
byte[] bytes = Convert.FromBase64String(result);
try
{
decode = encoding.GetString(bytes);
}
catch
{
decode = result;
}
return decode;
}
/// <summary>
/// Base64Url编码
/// </summary>
/// <param name="text">待编码的文本字符串</param>
/// <returns>编码的文本字符串</returns>
public static string Base64UrlEncode(this string text)
{
var plainTextBytes = Encoding.UTF8.GetBytes(text);
var base64 = Convert.ToBase64String(plainTextBytes).Replace('+', '-').Replace('/', '_').TrimEnd('=');
return base64;
}
/// <summary>
/// Base64Url解码
/// </summary>
/// <param name="base64UrlStr">使用Base64Url编码后的字符串</param>
/// <returns>解码后的内容</returns>
public static string Base64UrlDecode(this string base64UrlStr)
{
base64UrlStr = base64UrlStr.Replace('-', '+').Replace('_', '/');
switch (base64UrlStr.Length % 4)
{
case 2:
base64UrlStr += "==";
break;
case 3:
base64UrlStr += "=";
break;
}
var bytes = Convert.FromBase64String(base64UrlStr);
return Encoding.UTF8.GetString(bytes);
}
/// <summary>
/// 计算SHA1摘要
/// 注：默认使用UTF8编码
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static byte[] ToSHA1Bytes(this string str)
{
return str.ToSHA1Bytes(Encoding.UTF8);
}
/// <summary>
/// 计算SHA1摘要
/// </summary>
/// <param name="str">字符串</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
public static byte[] ToSHA1Bytes(this string str, Encoding encoding)
{
SHA1 sha1 = new SHA1CryptoServiceProvider();
byte[] inputBytes = encoding.GetBytes(str);
byte[] outputBytes = sha1.ComputeHash(inputBytes);
return outputBytes;
}
/// <summary>
/// 转为SHA1哈希加密字符串
/// 注：默认使用UTF8编码
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static string ToSHA1String(this string str)
{
return str.ToSHA1String(Encoding.UTF8);
}
/// <summary>
/// 转为SHA1哈希
/// </summary>
/// <param name="str">字符串</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
public static string ToSHA1String(this string str, Encoding encoding)
{
byte[] sha1Bytes = str.ToSHA1Bytes(encoding);
string resStr = BitConverter.ToString(sha1Bytes);
return resStr.Replace("-", "").ToLower();
}
/// <summary>
/// SHA256加密
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static string ToSHA256String(this string str)
{
byte[] bytes = Encoding.UTF8.GetBytes(str);
byte[] hash = SHA256.Create().ComputeHash(bytes);
StringBuilder builder = new StringBuilder();
for (int i = 0; i < hash.Length; i++)
{
builder.Append(hash[i].ToString("x2"));
}
return builder.ToString();
}
/// <summary>
/// HMACSHA256算法
/// </summary>
/// <param name="text">内容</param>
/// <param name="secret">密钥</param>
/// <returns></returns>
public static string ToHMACSHA256String(this string text, string secret)
{
secret = secret ?? "";
byte[] keyByte = Encoding.UTF8.GetBytes(secret);
byte[] messageBytes = Encoding.UTF8.GetBytes(text);
using (var hmacsha256 = new HMACSHA256(keyByte))
{
byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
return Convert.ToBase64String(hashmessage).Replace('+', '-').Replace('/', '_').TrimEnd('=');
}
}
/// <summary>
/// string转int
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static int ToInt(this string str)
{
str = str.Replace("\0", "");
if (string.IsNullOrEmpty(str))
return 0;
return Convert.ToInt32(str);
}
/// <summary>
/// string转long
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static long ToLong(this string str)
{
str = str.Replace("\0", "");
if (string.IsNullOrEmpty(str))
return 0;
return Convert.ToInt64(str);
}
/// <summary>
/// 二进制字符串转为Int
/// </summary>
/// <param name="str">二进制字符串</param>
/// <returns></returns>
public static int ToInt_FromBinString(this string str)
{
return Convert.ToInt32(str, 2);
}
/// <summary>
/// 将16进制字符串转为Int
/// </summary>
/// <param name="str">数值</param>
/// <returns></returns>
public static int ToInt0X(this string str)
{
int num = Int32.Parse(str, NumberStyles.HexNumber);
return num;
}
/// <summary>
/// 转换为double
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static double ToDouble(this string str)
{
return Convert.ToDouble(str);
}
/// <summary>
/// string转byte[]
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static byte[] ToBytes(this string str)
{
return Encoding.Default.GetBytes(str);
}
/// <summary>
/// string转byte[]
/// </summary>
/// <param name="str">字符串</param>
/// <param name="theEncoding">需要的编码</param>
/// <returns></returns>
public static byte[] ToBytes(this string str, Encoding theEncoding)
{
return theEncoding.GetBytes(str);
}
/// <summary>
/// 将16进制字符串转为Byte数组
/// </summary>
/// <param name="str">16进制字符串(2个16进制字符表示一个Byte)</param>
/// <returns></returns>
public static byte[] To0XBytes(this string str)
{
List<byte> resBytes = new List<byte>();
for (int i = 0; i < str.Length; i = i + 2)
{
string numStr = $@"{str[i]}{str[i + 1]}";
resBytes.Add((byte)numStr.ToInt0X());
}
return resBytes.ToArray();
}
/// <summary>
/// 将ASCII码形式的字符串转为对应字节数组
/// 注：一个字节一个ASCII码字符
/// </summary>
/// <param name="str">字符串</param>
/// <returns></returns>
public static byte[] ToASCIIBytes(this string str)
{
return str.ToList().Select(x => (byte)x).ToArray();
}
/// <summary>
/// 转为网络终结点IPEndPoint
/// </summary>=
/// <param name="str">字符串</param>
/// <returns></returns>
public static IPEndPoint ToIPEndPoint(this string str)
{
IPEndPoint iPEndPoint = null;
try
{
string[] strArray = str.Split(':').ToArray();
string addr = strArray[0];
int port = Convert.ToInt32(strArray[1]);
iPEndPoint = new IPEndPoint(IPAddress.Parse(addr), port);
}
catch
{
iPEndPoint = null;
}
return iPEndPoint;
}
/// <summary>
/// 将枚举类型的文本转为枚举类型
/// </summary>
/// <typeparam name="TEnum">枚举类型</typeparam>
/// <param name="enumText">枚举文本</param>
/// <returns></returns>
public static TEnum ToEnum<TEnum>(this string enumText) where TEnum : struct
{
Enum.TryParse(enumText, out TEnum value);
return value;
}
/// <summary>
/// 是否为弱密码
/// 注:密码必须包含数字、小写字母、大写字母和其他符号中的两种并且长度大于8
/// </summary>
/// <param name="pwd">密码</param>
/// <returns></returns>
public static bool IsWeakPwd(this string pwd)
{
if (pwd.IsNullOrEmpty())
throw new Exception("pwd不能为空");
string pattern = "(^[0-9]+$)|(^[a-z]+$)|(^[A-Z]+$)|(^.{0,8}$)";
if (Regex.IsMatch(pwd, pattern))
return true;
else
return false;
}
/// <summary>
/// 获取字符串中的所有邮件地址并转为小写
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static List<string> GetEmailAddress(this string text)
{
string pattern = "([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\\.[a-zA-Z0-9_-]+)";
return Regex.Matches(text, pattern).Cast<Match>().Select(x => x.Groups[0].ToString().ToLower()).ToList();
}
private static readonly Encoding _utf8Encoder = Encoding.GetEncoding(
"UTF-8",
new EncoderReplacementFallback(string.Empty),
new DecoderExceptionFallback()
);
/// <summary>
/// 移除非utf8字符
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static string RemoveNotUtf8(this string str)
{
return _utf8Encoder.GetString(_utf8Encoder.GetBytes(str));
}
/// <summary>
/// RSA SHA256签名
/// </summary>
/// <param name="str">字符串</param>
/// <param name="privateKey">私钥(PKCS1 若是JAVA的PKCS8则需要使用RSAPrivateKeyJavaToDotNet转换)</param>
/// <returns></returns>
public static string RSASign(string str, string privateKey)
{
//根据需要加签时的哈希算法转化成对应的hash字符节
byte[] bt = Encoding.GetEncoding("utf-8").GetBytes(str);
var sha256 = new SHA256CryptoServiceProvider();
byte[] rgbHash = sha256.ComputeHash(bt);
RSACryptoServiceProvider key = new RSACryptoServiceProvider();
key.FromXmlString(privateKey);
RSAPKCS1SignatureFormatter formatter = new RSAPKCS1SignatureFormatter(key);
formatter.SetHashAlgorithm("SHA256"); //此处是你需要加签的hash算法，需要和上边你计算的hash值的算法一致，不然会报错。
byte[] inArray = formatter.CreateSignature(rgbHash);
return Convert.ToBase64String(inArray);
}
/// <summary>
/// RSA私钥格式转换，java 2 .net
/// </summary>
/// <param name="privateKey">java生成的RSA私钥</param>
/// <returns></returns>
public static string RSAPrivateKeyJavaToDotNet(string privateKey)
{
RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKey));
return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent><P>{2}</P><Q>{3}</Q><DP>{4}</DP><DQ>{5}</DQ><InverseQ>{6}</InverseQ><D>{7}</D></RSAKeyValue>",
Convert.ToBase64String(privateKeyParam.Modulus.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.PublicExponent.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.P.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.Q.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.DP.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.DQ.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.QInv.ToByteArrayUnsigned()),
Convert.ToBase64String(privateKeyParam.Exponent.ToByteArrayUnsigned()));
}
}
标签：return,string,扩展,static,str,字符串,byte,public From： https://www.cnblogs.com/51net/p/16964584.html