效果

项目

代码 using Org.BouncyCastle.Crypto.Parameters;using Org.BouncyCastle.Crypto.Signers;using Org.BouncyCastle.Asn1.GM;using System;using System.Text;using System.Windows.Forms;using Org.BouncyCastle.Asn1.X9;using Org.BouncyCastle.Utilities.Encoders;using Org.BouncyCastle.Math;using Org.BouncyCastle.Crypto.Generators;using Org.BouncyCastle.Security;using System.Linq;namespace SM2VerifySignTool{ public partial Form1 : Form { public Form1() { InitializeComponent(); } int toDigit(char ch, int index) { int digit = Convert.ToInt32(ch.ToString(), 16);if (digit == -1) { throw new SystemException("Illegal hexadecimal character " + ch + " at index " + index); }return digit; } string HexToBase64(string hexString) { byte[] bytes = Enumerable.Range(0, hexString.Length) .Where(x => x % 2 == 0) .Select(x => Convert.ToByte(hexString.Substring(x, 2), 16)) .ToArray();return Convert.ToBase64String(bytes); } byte[] hexStrToByte(String hexStr) {if (( == hexStr) || (hexStr.Length == 0)) {return ; } char[] hexData = hexStr.ToCharArray(); int len = hexData.Length;if ((len & 0x1) != 0) { throw new SystemException("Odd number of characters."); } byte[] out1 = new byte[len >> 1]; int i = 0;for (int j = 0; j < len; i++) { int f = toDigit(hexData[j], j) << 4; j++; f |= toDigit(hexData[j], j); j++; out1[i] = ((byte)(f & 0xFF)); }return out1; } X9ECParameters x9ec = GMNamedCurves.GetByName("SM2P256V1"); /** *生成 */ void GenerateKey(out string pubkeyStr, out string prikeyStr) { var g = new ECKeyPairGenerator(); g.Init(new ECKeyGenerationParameters(new ECDomainParameters(x9ec), new SecureRandom())); var k = g.GenerateKeyPair(); byte[] pubkey = ((ECPublicKeyParameters)k.Public).Q.GetEncoded(false); byte[] privkey = ((ECPrivateKeyParameters)k.Private).D.ToByteArray(); prikeyStr = BitConverter.ToString(privkey).Replace("-", ""); pubkeyStr = BitConverter.ToString(pubkey).Replace("-", ""); } /** *加签 */ string Sign(string prikeyStr, string data) { byte[] msg = Encoding.UTF8.GetBytes(data); byte[] priKey = hexStrToByte(prikeyStr); SM2Signer sm2Signer = new SM2Signer(); ECPrivateKeyParameters privateKeyParameters = new ECPrivateKeyParameters(new BigInteger(1, priKey), new ECDomainParameters(x9ec)); sm2Signer.Init(true, privateKeyParameters); sm2Signer.BlockUpdate(msg, 0, msg.Length);return Hex.ToHexString(sm2Signer.GenerateSignature()); } /* * 验签 */ bool verifySign(string pubkeyStr, string data, string sign) { byte[] signHex = hexStrToByte(sign); byte[] pubkey = hexStrToByte(pubkeyStr); byte[] msgByte = Encoding.UTF8.GetBytes(data); SM2Signer sm2Signer = new SM2Signer(); ECPublicKeyParameters publicKeyParameters = new ECPublicKeyParameters(x9ec.Curve.DecodePoint(pubkey), new ECDomainParameters(x9ec)); sm2Signer.Init(false, publicKeyParameters); sm2Signer.BlockUpdate(msgByte, 0, msgByte.Length);return sm2Signer.VerifySignature(signHex); } private void btnVerify_Click(object sender, EventArgs e) { txtResult.Text = ""; try { string pubk = txtPubkey.Text; string data = txtData.Text; string sign = txtSign.Text; bool b = verifySign(pubk, data, sign);if (b) { txtResult.Text = "验证成功"; }else { txtResult.Text = "验证失败"; } } catch (Exception ex) { txtResult.Text = "验证异常:" + ex.Message; } } /// <summary> /// Base64字符串转Hex字符串↓ /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) { try { byte[] bytes = Convert.FromBase64String(txtBase64.Text); // 将base64字符串转换为byte数组 string hexString = BitConverter.ToString(bytes).Replace("-", ""); // 将byte数组转换为Hex字符串 txtHex.Text = hexString; } catch (Exception ex) { txtHex.Text = "转换异常:" + ex.Message; } } private void Form1_Load(object sender, EventArgs e) { //string pubkeyStr = ""; //string prikeyStr = ""; //GenerateKey(out pubkeyStr, out prikeyStr); //txtPriKey.Text = prikeyStr; //txtPubkey.Text = pubkeyStr; } private void button2_Click(object sender, EventArgs e) { try { string prik = txtPriKey.Text; string data = txtData.Text; txtSign.Text = Sign(prik, data); } catch (Exception ex) { txtSign.Text = "加签识别:" + ex.Message; } } private void button3_Click(object sender, EventArgs e) { string pubkeyStr = ""; string prikeyStr = ""; GenerateKey(out pubkeyStr, out prikeyStr); txtPriKey.Text = prikeyStr; txtPubkey.Text = pubkeyStr; } private void button4_Click(object sender, EventArgs e) { try { string hexString = txtHex.Text; string base64String = HexToBase64(hexString); txtBase64.Text = base64String; } catch (Exception ex) { txtBase64.Text = "转换异常:" + ex.Message; } } private void button5_Click(object sender, EventArgs e) { try { string originalString = txtStr.Text; byte[] bytes = System.Text.Encoding.UTF8.GetBytes(originalString); string base64String = Convert.ToBase64String(bytes); txtBase64.Text = base64String; } catch (Exception ex) { txtBase64.Text = "编码异常:" + ex.Message; } } private void button6_Click(object sender, EventArgs e) { try { string base64String = txtBase64.Text; byte[] bytes = Convert.FromBase64String(base64String); string decodedString = Encoding.UTF8.GetString(bytes); txtStr.Text = decodedString; } catch (Exception ex) { txtStr.Text = "解码异常:" + ex.Message; } } }}