银行对接加签验签工具类Sm3withSm2Helper

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Web;
  5 using Org.BouncyCastle.Asn1.X9;
  6 using Org.BouncyCastle.Crypto.Parameters;
  7 using Org.BouncyCastle.Crypto;
  8 using Org.BouncyCastle.Security;
  9 using Org.BouncyCastle.Crypto.Engines;
 10 using Org.BouncyCastle.Crypto.Digests;
 11 using Org.BouncyCastle.Utilities;
 12 using Org.BouncyCastle.Utilities.Encoders;
 13 using Org.BouncyCastle.Crypto.Generators;
 14 using System.IO;
 15 using Org.BouncyCastle.X509;
 16 using Org.BouncyCastle.Math;
 17 using Org.BouncyCastle.Asn1;
 18 using System.Text;
 19 using Org.BouncyCastle.Asn1.GM;
 20 using Org.BouncyCastle.Crypto.Signers;
 21 using System.Configuration;
 22 
 23 namespace FBW.MerchantAP.Tools
 24 {
 25     public class Sm3withSm2Helper
 26     {
 27 
 28         private static X9ECParameters x9ECParameters = GMNamedCurves.GetByName("sm2p256v1");
 29         private static ECDomainParameters ecDomainParameters = new ECDomainParameters(x9ECParameters.Curve, x9ECParameters.G, x9ECParameters.N);
 30 
 31         /**
 32          *
 33          * @param msg
 34          * @param userId
 35          * @param privateKey
 36          * @return r||s，直接拼接byte数组的rs
 37          */
 38         public static byte[] SignSm3WithSm2(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
 39         {
 40             return RsAsn1ToPlainByteArray(SignSm3WithSm2Asn1Rs(msg, userId, privateKey));
 41         }
 42 
 43 
 44 
 45         /**
 46          * 将BC SM2 RAW签名值转化为ASN1格式签名值
 47          * @param bcCipTxt
 48          * @return
 49          * @throws Exception
 50          */
 51         private static byte[] signRawToAsn1(byte[] bcCipTxt)
 52         {
 53 
 54             byte[] netSignCipTxt = new byte[73];
 55 
 56             byte[] signR = new byte[32];
 57             byte[] signS = new byte[32];
 58 
 59             Buffer.BlockCopy(bcCipTxt, 0, signR, 0, 32);
 60             Buffer.BlockCopy(bcCipTxt, 32, signS, 0, 32);
 61 
 62             //signR补位
 63             int wPos = 4;
 64             netSignCipTxt[0] = 0x30;
 65             netSignCipTxt[2] = 0x02;
 66             if ((signR[0] & 0xFF) >= 128)
 67             {
 68                 netSignCipTxt[wPos - 1] = 0x21;
 69                 netSignCipTxt[wPos] = 0x00;
 70                 wPos += 1;
 71             }
 72             else
 73             {
 74                 netSignCipTxt[wPos - 1] = 0x20;
 75             }
 76             Buffer.BlockCopy(signR, 0, netSignCipTxt, wPos, 32);
 77             wPos += 32;
 78 
 79             //signS补位
 80             netSignCipTxt[wPos] = 0x02;
 81             wPos += 1;
 82             if ((signS[0] & 0xFF) >= 128)
 83             {
 84                 netSignCipTxt[wPos] = 0x21;
 85                 wPos += 1;
 86                 netSignCipTxt[wPos] = 0x00;
 87                 wPos += 1;
 88             }
 89             else
 90             {
 91                 netSignCipTxt[wPos] = 0x20;
 92                 wPos += 1;
 93             }
 94             Buffer.BlockCopy(signS, 0, netSignCipTxt, wPos, 32);
 95             wPos += 32;
 96 
 97             if (70 == wPos)
 98             {
 99                 netSignCipTxt[1] = 0x44;
100             }
101             else if (71 == wPos)
102             {
103                 netSignCipTxt[1] = 0x45;
104             }
105             else if (72 == wPos)
106             {
107                 netSignCipTxt[1] = 0x46;
108             }
109             else
110             {
111                 throw new Exception("signRawToAsn1 Error!");
112             }
113 
114             byte[] resultBytes = new byte[wPos];
115             Buffer.BlockCopy(netSignCipTxt, 0, resultBytes, 0, wPos);
116 
117             return resultBytes;
118         }
119 
120         /**
121          * 将ASN1格式签名值转化为BC SM2 RAW 签名值
122          *
123          * @param  signature Asn1格式签名值
124          * @return byte[] Raw签名值
125          */
126         private static byte[] signAsn12Raw(byte[] signature)
127         {
128 
129             byte[] resultBytes = new byte[64];
130 
131             //截取signR
132             int wPos = 3;
133             if ((signature[wPos] & 0xFF) == 32)
134             {
135                 wPos += 1;
136             }
137             else if ((signature[wPos] & 0xFF) == 33)
138             {
139                 wPos += 2;
140             }
141             else
142             {
143                 throw new Exception("signR length Error!");
144             }
145             Buffer.BlockCopy(signature, wPos, resultBytes, 0, 32);
146             wPos += 32;
147 
148             //截取signS
149             wPos += 1;
150             if ((signature[wPos] & 0xFF) == 32)
151             {
152                 wPos += 1;
153             }
154             else if ((signature[wPos] & 0xFF) == 33)
155             {
156                 wPos += 2;
157             }
158             else
159             {
160                 throw new Exception("signS length Error!");
161             }
162             Buffer.BlockCopy(signature, wPos, resultBytes, 32, 32);
163 
164 
165 
166             return resultBytes;
167         }
168 
169         /**
170           * @param msg
171           * @param userId
172           * @param privateKey
173           * @return rs in <b>asn1 format</b>
174           */
175         public static byte[] SignSm3WithSm2Asn1Rs(byte[] msg, byte[] userId, AsymmetricKeyParameter privateKey)
176         {
177             try
178             {
179                 ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
180                 signer.Init(true, new ParametersWithID(privateKey, userId));
181                 signer.BlockUpdate(msg, 0, msg.Length);
182                 byte[] sig = signer.GenerateSignature();
183                 return sig;
184             }
185             catch (Exception e)
186             {
187                 ////log.Error("SignSm3WithSm2Asn1Rs error: " + e.Message, e);
188                 return null;
189             }
190         }
191 
192         /**
193         *
194         * @param msg
195         * @param userId
196         * @param rs r||s，直接拼接byte数组的rs
197         * @param publicKey
198         * @return
199         */
200         public static bool VerifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, AsymmetricKeyParameter publicKey)
201         {
202             if (rs == null || msg == null || userId == null) return false;
203             if (rs.Length != RS_LEN * 2) return false;
204             return VerifySm3WithSm2Asn1Rs(msg, userId, RsPlainByteArrayToAsn1(rs), publicKey);
205         }
206 
207         /**
208          *
209          * @param msg
210          * @param userId
211          * @param rs in <b>asn1 format</b>
212          * @param publicKey
213          * @return
214          */
215 
216         public static bool VerifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] sign, AsymmetricKeyParameter publicKey)
217         {
218             try
219             {
220                 ISigner signer = SignerUtilities.GetSigner("SM3withSM2");
221                 signer.Init(false, new ParametersWithID(publicKey, userId));
222                 signer.BlockUpdate(msg, 0, msg.Length);
223                 return signer.VerifySignature(sign);
224             }
225             catch (Exception e)
226             {
227                 ////log.Error("VerifySm3WithSm2Asn1Rs error: " + e.Message, e);
228                 return false;
229             }
230         }
231 
232         /**
233          * bc加解密使用旧标c1||c2||c3，此方法在加密后调用，将结果转化为c1||c3||c2
234          * @param c1c2c3
235          * @return
236          */
237         private static byte[] ChangeC1C2C3ToC1C3C2(byte[] c1c2c3)
238         {
239             int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
240             const int c3Len = 32; //new SM3Digest().getDigestSize();
241             byte[] result = new byte[c1c2c3.Length];
242             Buffer.BlockCopy(c1c2c3, 0, result, 0, c1Len); //c1
243             Buffer.BlockCopy(c1c2c3, c1c2c3.Length - c3Len, result, c1Len, c3Len); //c3
244             Buffer.BlockCopy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.Length - c1Len - c3Len); //c2
245             return result;
246         }
247 
248 
249         /**
250          * bc加解密使用旧标c1||c3||c2，此方法在解密前调用，将密文转化为c1||c2||c3再去解密
251          * @param c1c3c2
252          * @return
253          */
254         private static byte[] ChangeC1C3C2ToC1C2C3(byte[] c1c3c2)
255         {
256             int c1Len = (x9ECParameters.Curve.FieldSize + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
257             const int c3Len = 32; //new SM3Digest().GetDigestSize();
258             byte[] result = new byte[c1c3c2.Length];
259             Buffer.BlockCopy(c1c3c2, 0, result, 0, c1Len); //c1: 0->65
260             Buffer.BlockCopy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.Length - c1Len - c3Len); //c2
261             Buffer.BlockCopy(c1c3c2, c1Len, result, c1c3c2.Length - c3Len, c3Len); //c3
262             return result;
263         }
264 
265         /**
266          * c1||c3||c2
267          * @param data
268          * @param key
269          * @return
270          */
271         public static byte[] Sm2Decrypt(byte[] data, AsymmetricKeyParameter key)
272         {
273             return Sm2DecryptOld(ChangeC1C3C2ToC1C2C3(data), key);
274         }
275 
276         /**
277          * c1||c3||c2
278          * @param data
279          * @param key
280          * @return
281          */
282 
283         public static byte[] Sm2Encrypt(byte[] data, AsymmetricKeyParameter key)
284         {
285             return ChangeC1C2C3ToC1C3C2(Sm2EncryptOld(data, key));
286         }
287 
288         /**
289          * c1||c2||c3
290          * @param data
291          * @param key
292          * @return
293          */
294         public static byte[] Sm2EncryptOld(byte[] data, AsymmetricKeyParameter pubkey)
295         {
296             try
297             {
298                 SM2Engine sm2Engine = new SM2Engine();
299                 sm2Engine.Init(true, new ParametersWithRandom(pubkey, new SecureRandom()));
300                 return sm2Engine.ProcessBlock(data, 0, data.Length);
301             }
302             catch (Exception e)
303             {
304                 ////log.Error("Sm2EncryptOld error: " + e.Message, e);
305                 return null;
306             }
307         }
308 
309         /**
310          * c1||c2||c3
311          * @param data
312          * @param key
313          * @return
314          */
315         public static byte[] Sm2DecryptOld(byte[] data, AsymmetricKeyParameter key)
316         {
317             try
318             {
319                 SM2Engine sm2Engine = new SM2Engine();
320                 sm2Engine.Init(false, key);
321                 return sm2Engine.ProcessBlock(data, 0, data.Length);
322             }
323             catch (Exception e)
324             {
325                 ////log.Error("Sm2DecryptOld error: " + e.Message, e);
326                 return null;
327             }
328         }
329 
330         /**
331          * @param bytes
332          * @return
333          */
334         public static byte[] Sm3(byte[] bytes)
335         {
336             try
337             {
338                 SM3Digest digest = new SM3Digest();
339                 digest.BlockUpdate(bytes, 0, bytes.Length);
340                 byte[] result = DigestUtilities.DoFinal(digest);
341                 return result;
342             }
343             catch (Exception e)
344             {
345                 //log.Error("Sm3 error: " + e.Message, e);
346                 return null;
347             }
348         }
349 
350         private const int RS_LEN = 32;
351 
352         private static byte[] BigIntToFixexLengthBytes(BigInteger rOrS)
353         {
354             // for sm2p256v1, n is 00fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123,
355             // r and s are the result of mod n, so they should be less than n and have length<=32
356             byte[] rs = rOrS.ToByteArray();
357             if (rs.Length == RS_LEN) return rs;
358             else if (rs.Length == RS_LEN + 1 && rs[0] == 0) return Arrays.CopyOfRange(rs, 1, RS_LEN + 1);
359             else if (rs.Length < RS_LEN)
360             {
361                 byte[] result = new byte[RS_LEN];
362                 Arrays.Fill(result, (byte)0);
363                 Buffer.BlockCopy(rs, 0, result, RS_LEN - rs.Length, rs.Length);
364                 return result;
365             }
366             else
367             {
368                 throw new ArgumentException("err rs: " + Hex.ToHexString(rs));
369             }
370         }
371 
372         /**
373          * BC的SM3withSM2签名得到的结果的rs是asn1格式的，这个方法转化成直接拼接r||s
374          * @param rsDer rs in asn1 format
375          * @return sign result in plain byte array
376          */
377         private static byte[] RsAsn1ToPlainByteArray(byte[] rsDer)
378         {
379             Asn1Sequence seq = Asn1Sequence.GetInstance(rsDer);
380             byte[] r = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[0]).Value);
381             byte[] s = BigIntToFixexLengthBytes(DerInteger.GetInstance(seq[1]).Value);
382             byte[] result = new byte[RS_LEN * 2];
383             Buffer.BlockCopy(r, 0, result, 0, r.Length);
384             Buffer.BlockCopy(s, 0, result, RS_LEN, s.Length);
385             return result;
386         }
387 
388         /**
389          * BC的SM3withSM2验签需要的rs是asn1格式的，这个方法将直接拼接r||s的字节数组转化成asn1格式
390          * @param sign in plain byte array
391          * @return rs result in asn1 format
392          */
393         private static byte[] RsPlainByteArrayToAsn1(byte[] sign)
394         {
395             if (sign.Length != RS_LEN * 2) throw new ArgumentException("err rs. ");
396             BigInteger r = new BigInteger(1, Arrays.CopyOfRange(sign, 0, RS_LEN));
397             BigInteger s = new BigInteger(1, Arrays.CopyOfRange(sign, RS_LEN, RS_LEN * 2));
398             Asn1EncodableVector v = new Asn1EncodableVector();
399             v.Add(new DerInteger(r));
400             v.Add(new DerInteger(s));
401             try
402             {
403                 return new DerSequence(v).GetEncoded("DER");
404             }
405             catch (IOException e)
406             {
407                 //log.Error("RsPlainByteArrayToAsn1 error: " + e.Message, e);
408                 return null;
409             }
410         }
411 
412         public static AsymmetricCipherKeyPair GenerateKeyPair()
413         {
414             try
415             {
416                 ECKeyPairGenerator kpGen = new ECKeyPairGenerator();
417                 kpGen.Init(new ECKeyGenerationParameters(ecDomainParameters, new SecureRandom()));
418                 return kpGen.GenerateKeyPair();
419             }
420             catch (Exception e)
421             {
422                 //log.Error("generateKeyPair error: " + e.Message, e);
423                 return null;
424             }
425         }
426 
427         public static ECPrivateKeyParameters GetPrivatekeyFromD(BigInteger d)
428         {
429             return new ECPrivateKeyParameters(d, ecDomainParameters);
430         }
431 
432         public static ECPublicKeyParameters GetPublickeyFromXY(BigInteger x, BigInteger y)
433         {
434             return new ECPublicKeyParameters(x9ECParameters.Curve.CreatePoint(x, y), ecDomainParameters);
435         }
436 
437         public static AsymmetricKeyParameter GetPublickeyFromX509File(FileInfo file)
438         {
439 
440             FileStream fileStream = null;
441             try
442             {
443                 //file.DirectoryName + "\\" + file.Name
444                 fileStream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read);
445                 X509Certificate certificate = new X509CertificateParser().ReadCertificate(fileStream);
446                 return certificate.GetPublicKey();
447             }
448             catch (Exception e)
449             {
450                 //log.Error(file.Name + "读取失败，异常：" + e);
451             }
452             finally
453             {
454                 if (fileStream != null)
455                     fileStream.Close();
456             }
457             return null;
458         }
459 
460         public class Sm2Cert
461         {
462             public AsymmetricKeyParameter privateKey;
463             public AsymmetricKeyParameter publicKey;
464             public String certId;
465         }
466 
467         private static byte[] ToByteArray(int i)
468         {
469             byte[] byteArray = new byte[4];
470             byteArray[0] = (byte)(i >> 24);
471             byteArray[1] = (byte)((i & 0xFFFFFF) >> 16);
472             byteArray[2] = (byte)((i & 0xFFFF) >> 8);
473             byteArray[3] = (byte)(i & 0xFF);
474             return byteArray;
475         }
476 
477         /**
478          * 字节数组拼接
479          *
480          * @param params
481          * @return
482          */
483         private static byte[] Join(params byte[][] byteArrays)
484         {
485             List<byte> byteSource = new List<byte>();
486             for (int i = 0; i < byteArrays.Length; i++)
487             {
488                 byteSource.AddRange(byteArrays[i]);
489             }
490             byte[] data = byteSource.ToArray();
491             return data;
492         }
493 
494         /**
495          * 密钥派生函数
496          *
497          * @param Z
498          * @param klen
499          *            生成klen字节数长度的密钥
500          * @return
501          */
502         private static byte[] KDF(byte[] Z, int klen)
503         {
504             int ct = 1;
505             int end = (int)Math.Ceiling(klen * 1.0 / 32);
506             List<byte> byteSource = new List<byte>();
507             try
508             {
509                 for (int i = 1; i < end; i++)
510                 {
511                     byteSource.AddRange(Sm3withSm2Helper.Sm3(Join(Z, ToByteArray(ct))));
512                     ct++;
513                 }
514                 byte[] last = Sm3withSm2Helper.Sm3(Join(Z, ToByteArray(ct)));
515                 if (klen % 32 == 0)
516                 {
517                     byteSource.AddRange(last);
518                 }
519                 else
520                     byteSource.AddRange(Arrays.CopyOfRange(last, 0, klen % 32));
521                 return byteSource.ToArray();
522             }
523             catch (Exception e)
524             {
525                 //log.Error("KDF error: " + e.Message, e);
526             }
527             return null;
528         }
529 
530         public static byte[] Sm4DecryptCBC(byte[] keyBytes, byte[] cipher, byte[] iv, String algo)
531         {
532             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
533             if (cipher.Length % 16 != 0) throw new ArgumentException("err data length");
534 
535             try
536             {
537                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
538                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
539                 if (iv == null) iv = ZeroIv(algo);
540                 c.Init(false, new ParametersWithIV(key, iv));
541                 return c.DoFinal(cipher);
542             }
543             catch (Exception e)
544             {
545                 //log.Error("Sm4DecryptCBC error: " + e.Message, e);
546                 return null;
547             }
548         }
549 
550 
551         public static byte[] Sm4EncryptCBC(byte[] keyBytes, byte[] plain, byte[] iv, String algo)
552         {
553             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
554             if (plain.Length % 16 != 0) throw new ArgumentException("err data length");
555 
556             try
557             {
558                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
559                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
560                 if (iv == null) iv = ZeroIv(algo);
561                 c.Init(true, new ParametersWithIV(key, iv));
562                 return c.DoFinal(plain);
563             }
564             catch (Exception e)
565             {
566                 //log.Error("Sm4EncryptCBC error: " + e.Message, e);
567                 return null;
568             }
569         }
570 
571 
572         public static byte[] Sm4EncryptECB(byte[] keyBytes, byte[] plain, string algo)
573         {
574             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
575             if (plain.Length % 16 != 0) throw new ArgumentException("err data length");
576 
577             try
578             {
579                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
580                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
581                 c.Init(true, key);
582                 return c.DoFinal(plain);
583             }
584             catch (Exception e)
585             {
586                 //log.Error("Sm4EncryptECB error: " + e.Message, e);
587                 return null;
588             }
589         }
590 
591         public static byte[] Sm4DecryptECB(byte[] keyBytes, byte[] cipher, string algo)
592         {
593             if (keyBytes.Length != 16) throw new ArgumentException("err key length");
594             if (cipher.Length % 16 != 0) throw new ArgumentException("err data length");
595 
596             try
597             {
598                 KeyParameter key = ParameterUtilities.CreateKeyParameter("SM4", keyBytes);
599                 IBufferedCipher c = CipherUtilities.GetCipher(algo);
600                 c.Init(false, key);
601                 return c.DoFinal(cipher);
602             }
603             catch (Exception e)
604             {
605                 //log.Error("Sm4DecryptECB error: " + e.Message, e);
606                 return null;
607             }
608         }
609 
610         public const String SM4_ECB_NOPADDING = "SM4/ECB/NoPadding";
611         public const String SM4_CBC_NOPADDING = "SM4/CBC/NoPadding";
612         public const String SM4_CBC_PKCS7PADDING = "SM4/CBC/PKCS7Padding";
613 
614         /**
615          * cfca官网CSP沙箱导出的sm2文件
616          * @param pem 二进制原文
617          * @param pwd 密码
618          * @return
619          */
620         public static Sm2Cert readSm2File(byte[] pem, String pwd)
621         {
622 
623             Sm2Cert sm2Cert = new Sm2Cert();
624             try
625             {
626                 Asn1Sequence asn1Sequence = (Asn1Sequence)Asn1Object.FromByteArray(pem);
627                 //            ASN1Integer asn1Integer = (ASN1Integer) asn1Sequence.getObjectAt(0); //version=1
628                 Asn1Sequence priSeq = (Asn1Sequence)asn1Sequence[1];//private key
629                 Asn1Sequence pubSeq = (Asn1Sequence)asn1Sequence[2];//public key and x509 cert
630 
631                 //            ASN1ObjectIdentifier sm2DataOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(0);
632                 //            ASN1ObjectIdentifier sm4AlgOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(1);
633                 Asn1OctetString priKeyAsn1 = (Asn1OctetString)priSeq[2];
634                 byte[] key = KDF(System.Text.Encoding.UTF8.GetBytes(pwd), 32);
635                 byte[] priKeyD = Sm4DecryptCBC(Arrays.CopyOfRange(key, 16, 32),
636                         priKeyAsn1.GetOctets(),
637                         Arrays.CopyOfRange(key, 0, 16), SM4_CBC_PKCS7PADDING);
638                 sm2Cert.privateKey = GetPrivatekeyFromD(new BigInteger(1, priKeyD));
639                 //            //log.Info(Hex.toHexString(priKeyD));
640 
641                 //            ASN1ObjectIdentifier sm2DataOidPub = (ASN1ObjectIdentifier) pubSeq.getObjectAt(0);
642                 Asn1OctetString pubKeyX509 = (Asn1OctetString)pubSeq[1];
643                 X509Certificate x509 = (X509Certificate)new X509CertificateParser().ReadCertificate(pubKeyX509.GetOctets());
644                 sm2Cert.publicKey = x509.GetPublicKey();
645                 sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
646                 return sm2Cert;
647             }
648             catch (Exception e)
649             {
650                 //log.Error("readSm2File error: " + e.Message, e);
651                 return null;
652             }
653         }
654 
655         /**
656          *
657          * @param cert
658          * @return
659          */
660         public static Sm2Cert ReadSm2X509Cert(byte[] cert)
661         {
662             Sm2Cert sm2Cert = new Sm2Cert();
663             try
664             {
665 
666                 X509Certificate x509 = new X509CertificateParser().ReadCertificate(cert);
667                 sm2Cert.publicKey = x509.GetPublicKey();
668                 sm2Cert.certId = x509.SerialNumber.ToString(10); //这里转10进账，有啥其他进制要求的自己改改
669                 return sm2Cert;
670             }
671             catch (Exception e)
672             {
673                 //log.Error("ReadSm2X509Cert error: " + e.Message, e);
674                 return null;
675             }
676         }
677 
678         public static byte[] ZeroIv(String algo)
679         {
680 
681             try
682             {
683                 IBufferedCipher cipher = CipherUtilities.GetCipher(algo);
684                 int blockSize = cipher.GetBlockSize();
685                 byte[] iv = new byte[blockSize];
686                 Arrays.Fill(iv, (byte)0);
687                 return iv;
688             }
689             catch (Exception e)
690             {
691                 //log.Error("ZeroIv error: " + e.Message, e);
692                 return null;
693             }
694         }
695 
696         //国密标准公钥头
697         public const String SM2_KEY_TITLE = "3059301306072a8648ce3d020106082a811ccf5501822d03420004";
698         public const String USER_ID = "1234567812345678";
699 
700         public class Sm2Vo
701         {
702             public String sm2_x;
703             public String sm2_y;
704         }
705 
706 
707         /**
708          * BASE64格式公钥转换为裸公钥
709          * @param sm2Key
710          * @return
711          */
712         private static Sm2Vo parseBase64TRawKey(String sm2Key)
713         {
714             if (null == sm2Key)
715             {
716                 return null;
717             }
718 
719             String sm2_asn1 = Hex.ToHexString(Convert.FromBase64String(sm2Key));
720             if (!sm2_asn1.StartsWith(SM2_KEY_TITLE))
721             {
722                 return null;
723             }
724             Sm2Vo sm2Cert = new Sm2Vo();
725             String sm2_xy = sm2_asn1.Substring(SM2_KEY_TITLE.Length, sm2_asn1.Length - SM2_KEY_TITLE.Length);
726             sm2Cert.sm2_x = sm2_xy.Substring(0, sm2_xy.Length / 2);
727             sm2Cert.sm2_y = sm2_xy.Substring(sm2_xy.Length / 2, sm2_xy.Length - sm2_xy.Length / 2);
728 
729             return sm2Cert;
730         }
731 
732         /// <summary>
733         /// 使用国密加签(聚合支付)
734         /// </summary>
735         /// <param name="str">需要加签的字符</param>
736         /// <returns></returns>
737         public static string GenerateSmSign(string str)
738         {
739             // 生成公私钥对
740             AsymmetricCipherKeyPair kp = Sm3withSm2Helper.GenerateKeyPair();
741             string a = Convert.ToString(((ECPrivateKeyParameters)kp.Private).D);
742             string privateKey = ConfigurationManager.AppSettings["privatekey"].ToString();
743 
744             AsymmetricKeyParameter SMprivateKey = GetPrivatekeyFromD(new BigInteger(privateKey, 16));
745 
746             //1.国密签名
747             byte[] msg = System.Text.Encoding.UTF8.GetBytes(str);
748             //签名 USER_ID 应使用国密局推荐 ID，即“1234567812345678”
749             byte[] userId = System.Text.Encoding.UTF8.GetBytes(USER_ID);
750             byte[] sig = SignSm3WithSm2(msg, userId, SMprivateKey);
751             //国密加签结果
752             string c = System.Convert.ToBase64String(signRawToAsn1(sig));
753             return c;
754         }
755 
756         /// <summary>
757         /// 验证加签是否正确(聚合)
758         /// </summary>
759         /// <param name="rawMsg">原字符</param>
760         /// <param name="signedStr">返回的签名</param>
761         /// <returns></returns>
762         public static bool VerifySmSign(string rawMsg, string signedStr)
763         {
764 
765             string publicKey = ConfigurationManager.AppSettings["publickey"];
766             byte[] sig2 = Convert.FromBase64String(signedStr);
767             Sm2Vo sm2Vo = parseBase64TRawKey(publicKey);
768             string privateKeyRawX = sm2Vo.sm2_x;
769             string privateKeyRawY = sm2Vo.sm2_y;
770             AsymmetricKeyParameter SMPbkey = GetPublickeyFromXY(new BigInteger(privateKeyRawX, 16), new BigInteger(privateKeyRawY, 16));
771             byte[] sig3 = signAsn12Raw(sig2);
772             byte[] msg = System.Text.Encoding.UTF8.GetBytes(rawMsg);
773             //签名 USER_ID 应使用国密局推荐 ID，即“1234567812345678”
774             byte[] userId = System.Text.Encoding.UTF8.GetBytes(USER_ID);
775             bool flag = VerifySm3WithSm2(msg, userId, sig3, SMPbkey);
776             return flag;
777         }
778 
779         /// <summary>
780         /// 单笔下单使用国密加签(apiSign)
781         /// </summary>
782         /// <param name="str">需要加签的字符</param>
783         /// <returns></returns>
784         public static string SingOrderGenerateSmSign(string str)
785         {
786             string privateKey = ConfigurationManager.AppSettings["singprivateKey"].ToString();
787             AsymmetricKeyParameter SMprivateKey = GetPrivatekeyFromD(new BigInteger(privateKey, 16));
788             //1.国密签名
789             byte[] msg = System.Text.Encoding.UTF8.GetBytes(str);
790             var sm2 = new SM2Signer(new SM3Digest());
791             ICipherParameters cp; cp = new ParametersWithRandom(SMprivateKey);
792             sm2.Init(true, cp);
793             sm2.BlockUpdate(msg, 0, msg.Length);
794             var signbyte = sm2.GenerateSignature();
795             return Hex.ToHexString(RsAsn1ToPlainByteArray(signbyte));
796         }
797 
798         /// <summary>
799         ///单笔下单 sm3加密(Sign)
800         /// </summary>
801         /// <param name="data"></param>
802         /// <returns></returns>
803         public static string ToSM3byte(string data)
804         {
805             byte[] msg = Encoding.GetEncoding("utf-8").GetBytes(data);
806             SM3Digest sm3 = new SM3Digest();
807             sm3.BlockUpdate(msg, 0, msg.Length);
808             byte[] md = new byte[sm3.GetDigestSize()];//SM3算法产生的哈希值大小
809             sm3.DoFinal(md, 0);
810             return new UTF8Encoding().GetString(Hex.Encode(md));
811         }
812 
813     }
814 }
使用 nuget 第三方加密算法包：
posted on 2023-03-24 15:40 95后的码农阅读(935) 评论(0) 编辑收藏举报
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