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110 lines
3.2 KiB
110 lines
3.2 KiB
using Org.BouncyCastle.Crypto.Generators;
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using Org.BouncyCastle.Crypto.Parameters;
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using Org.BouncyCastle.Math;
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using Org.BouncyCastle.Math.EC;
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using Org.BouncyCastle.Security;
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namespace Admin.NET.Core;
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public class SM2
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{
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public static SM2 Instance
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{
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get
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{
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return new SM2();
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}
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}
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public static SM2 InstanceTest
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{
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get
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{
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return new SM2();
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}
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}
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public static readonly string[] sm2_param = {
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"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF",// p,0
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"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC",// a,1
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"28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93",// b,2
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"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123",// n,3
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"32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7",// gx,4
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"BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0" // gy,5
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};
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public string[] ecc_param = sm2_param;
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public readonly BigInteger ecc_p;
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public readonly BigInteger ecc_a;
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public readonly BigInteger ecc_b;
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public readonly BigInteger ecc_n;
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public readonly BigInteger ecc_gx;
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public readonly BigInteger ecc_gy;
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public readonly ECCurve ecc_curve;
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public readonly ECPoint ecc_point_g;
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public readonly ECDomainParameters ecc_bc_spec;
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public readonly ECKeyPairGenerator ecc_key_pair_generator;
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private SM2()
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{
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ecc_param = sm2_param;
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ecc_p = new BigInteger(ecc_param[0], 16);
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ecc_a = new BigInteger(ecc_param[1], 16);
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ecc_b = new BigInteger(ecc_param[2], 16);
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ecc_n = new BigInteger(ecc_param[3], 16);
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ecc_gx = new BigInteger(ecc_param[4], 16);
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ecc_gy = new BigInteger(ecc_param[5], 16);
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ecc_curve = new FpCurve(ecc_p, ecc_a, ecc_b, null, null);
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ecc_point_g = ecc_curve.CreatePoint(ecc_gx, ecc_gy);
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ecc_bc_spec = new ECDomainParameters(ecc_curve, ecc_point_g, ecc_n);
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ECKeyGenerationParameters ecc_ecgenparam;
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ecc_ecgenparam = new ECKeyGenerationParameters(ecc_bc_spec, new SecureRandom());
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ecc_key_pair_generator = new ECKeyPairGenerator();
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ecc_key_pair_generator.Init(ecc_ecgenparam);
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}
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public virtual byte[] Sm2GetZ(byte[] userId, ECPoint userKey)
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{
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var sm3 = new SM3Digest();
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byte[] p;
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// userId length
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int len = userId.Length * 8;
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sm3.Update((byte)(len >> 8 & 0x00ff));
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sm3.Update((byte)(len & 0x00ff));
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// userId
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sm3.BlockUpdate(userId, 0, userId.Length);
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// a,b
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p = ecc_a.ToByteArray();
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sm3.BlockUpdate(p, 0, p.Length);
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p = ecc_b.ToByteArray();
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sm3.BlockUpdate(p, 0, p.Length);
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// gx,gy
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p = ecc_gx.ToByteArray();
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sm3.BlockUpdate(p, 0, p.Length);
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p = ecc_gy.ToByteArray();
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sm3.BlockUpdate(p, 0, p.Length);
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// x,y
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p = userKey.AffineXCoord.ToBigInteger().ToByteArray();
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sm3.BlockUpdate(p, 0, p.Length);
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p = userKey.AffineYCoord.ToBigInteger().ToByteArray();
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sm3.BlockUpdate(p, 0, p.Length);
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// Z
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byte[] md = new byte[sm3.GetDigestSize()];
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sm3.DoFinal(md, 0);
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return md;
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}
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}
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