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@ -7,7 +7,7 @@ public static class RSAHelper
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private static string publicKey =
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"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";
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private static string privateKey =
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"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";
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"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";
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// 公钥加密
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public static string Encrypt(string plainText)
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@ -28,36 +28,37 @@ public static class RSAHelper
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/// <returns>RSACryptoServiceProvider 实例</returns>
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private static RSACryptoServiceProvider CreateFromBase64PublicKey(string base64PublicKey)
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{
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byte[] keyBytes = Convert.FromBase64String(base64PublicKey);
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// 解析 DER 格式的公钥，获取 Modulus 和 Exponent
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int offset = 0;
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if (keyBytes[offset++] != 0x30) throw new Exception("Invalid public key format");
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ReadLength(keyBytes, ref offset); // 跳过序列长度
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ReadLengthPublic(keyBytes, ref offset); // 跳过序列长度
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// 跳过算法标识部分
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if (keyBytes[offset++] != 0x30) throw new Exception("Invalid public key format");
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ReadLength(keyBytes, ref offset);
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ReadLengthPublic(keyBytes, ref offset);
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offset += 13; // rsaEncryption OID + NULL
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if (keyBytes[offset++] != 0x03) throw new Exception("Invalid public key format");
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int bitStringLength = ReadLength(keyBytes, ref offset);
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int bitStringLength = ReadLengthPublic(keyBytes, ref offset);
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offset++; // unused bits
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if (keyBytes[offset++] != 0x30) throw new Exception("Invalid public key format");
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ReadLength(keyBytes, ref offset);
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ReadLengthPublic(keyBytes, ref offset);
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// 读取 Modulus
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if (keyBytes[offset++] != 0x02) throw new Exception("Invalid public key format");
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int modulusLength = ReadLength(keyBytes, ref offset);
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int modulusLength = ReadLengthPublic(keyBytes, ref offset);
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byte[] modulus = new byte[modulusLength];
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Array.Copy(keyBytes, offset, modulus, 0, modulusLength);
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offset += modulusLength;
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// 读取 Exponent
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if (keyBytes[offset++] != 0x02) throw new Exception("Invalid public key format");
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int exponentLength = ReadLength(keyBytes, ref offset);
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int exponentLength = ReadLengthPublic(keyBytes, ref offset);
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byte[] exponent = new byte[exponentLength];
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Array.Copy(keyBytes, offset, exponent, 0, exponentLength);
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@ -69,7 +70,7 @@ public static class RSAHelper
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return rsa;
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}
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private static int ReadLength(byte[] data, ref int offset)
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private static int ReadLengthPublic(byte[] data, ref int offset)
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{
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int length = data[offset++];
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if ((length & 0x80) == 0x80)
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@ -84,10 +85,147 @@ public static class RSAHelper
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return length;
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}
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/// <summary>
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/// 从 Base64 私钥（PKCS#1 或 PKCS#8）得到 RSACryptoServiceProvider（适用于 Unity2019.4）
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/// </summary>
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public static RSACryptoServiceProvider LoadPrivateKeyFromBase64(string base64)
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{
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if (string.IsNullOrEmpty(base64)) throw new ArgumentNullException(nameof(base64));
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byte[] data = Convert.FromBase64String(base64);
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// 先尝试解析为 PKCS#8（PrivateKeyInfo -> OCTET STRING 包 PKCS#1）
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try
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{
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byte[] pkcs1 = TryExtractPkcs1FromPkcs8(data);
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return LoadPkcs1(pkcs1);
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}
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catch (Exception)
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{
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// 如果不是 PKCS#8，再尝试直接解析 PKCS#1
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return LoadPkcs1(data);
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}
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}
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private static byte[] TryExtractPkcs1FromPkcs8(byte[] data)
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{
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int offset = 0;
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// Expect: SEQUENCE
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if (data[offset++] != 0x30) throw new Exception("Not a valid ASN.1 SEQUENCE (PKCS#8)");
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ReadLength(data, ref offset); // skip top-level length
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// Optional version INTEGER (usually present)
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if (data[offset] == 0x02)
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{
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offset++; // tag
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int verLen = ReadLength(data, ref offset);
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offset += verLen;
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}
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// Next should be algorithmIdentifier (SEQUENCE) — skip it properly
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if (data[offset] != 0x30) throw new Exception("Invalid PKCS#8, missing alg sequence");
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offset++; // tag
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int algLen = ReadLength(data, ref offset);
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offset += algLen;
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// Next should be OCTET STRING (privateKey)
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if (data[offset++] != 0x04) throw new Exception("Invalid PKCS#8, missing privateKey OCTET STRING");
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int pkcs1Len = ReadLength(data, ref offset);
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if (offset + pkcs1Len > data.Length) throw new Exception("Invalid lengths in PKCS#8");
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|
|
|
byte[] inner = new byte[pkcs1Len];
|
|
|
|
|
Buffer.BlockCopy(data, offset, inner, 0, pkcs1Len);
|
|
|
|
|
return inner;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
private static RSACryptoServiceProvider LoadPkcs1(byte[] data)
|
|
|
|
|
{
|
|
|
|
|
int offset = 0;
|
|
|
|
|
if (data[offset++] != 0x30) throw new Exception("Invalid PKCS#1: no SEQUENCE");
|
|
|
|
|
ReadLength(data, ref offset);
|
|
|
|
|
|
|
|
|
|
// version INTEGER (skip)
|
|
|
|
|
if (data[offset] == 0x02)
|
|
|
|
|
{
|
|
|
|
|
offset++; // tag
|
|
|
|
|
int vlen = ReadLength(data, ref offset);
|
|
|
|
|
offset += vlen;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
RSAParameters p = new RSAParameters();
|
|
|
|
|
p.Modulus = ReadInteger(data, ref offset, "Modulus");
|
|
|
|
|
p.Exponent = ReadInteger(data, ref offset, "Public Exponent");
|
|
|
|
|
p.D = ReadInteger(data, ref offset, "Private Exponent");
|
|
|
|
|
p.P = ReadInteger(data, ref offset, "P");
|
|
|
|
|
p.Q = ReadInteger(data, ref offset, "Q");
|
|
|
|
|
p.DP = ReadInteger(data, ref offset, "DP");
|
|
|
|
|
p.DQ = ReadInteger(data, ref offset, "DQ");
|
|
|
|
|
p.InverseQ = ReadInteger(data, ref offset, "InverseQ");
|
|
|
|
|
|
|
|
|
|
var rsa = new RSACryptoServiceProvider();
|
|
|
|
|
rsa.ImportParameters(p);
|
|
|
|
|
return rsa;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
private static byte[] ReadInteger(byte[] data, ref int offset, string nameForError = null)
|
|
|
|
|
{
|
|
|
|
|
if (data[offset] != 0x02)
|
|
|
|
|
{
|
|
|
|
|
// 报错时输出附近几个字节，便于调试
|
|
|
|
|
string hexSnippet = GetHexSnippet(data, offset, 12);
|
|
|
|
|
throw new Exception($"Expected INTEGER at offset {offset} ({nameForError ?? ""}), but found 0x{data[offset]:X2}. Nearby: {hexSnippet}");
|
|
|
|
|
}
|
|
|
|
|
offset++; // skip INTEGER tag
|
|
|
|
|
int len = ReadLength(data, ref offset);
|
|
|
|
|
|
|
|
|
|
// 如果有前导 0x00, 去掉（去除符号位）
|
|
|
|
|
if (len > 0 && data[offset] == 0x00)
|
|
|
|
|
{
|
|
|
|
|
offset++;
|
|
|
|
|
len--;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (len < 0 || offset + len > data.Length) throw new Exception("Invalid integer length");
|
|
|
|
|
byte[] value = new byte[len];
|
|
|
|
|
Buffer.BlockCopy(data, offset, value, 0, len);
|
|
|
|
|
offset += len;
|
|
|
|
|
return value;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
private static int ReadLength(byte[] data, ref int offset)
|
|
|
|
|
{
|
|
|
|
|
if (offset >= data.Length) throw new Exception("Invalid offset while reading length");
|
|
|
|
|
int length = data[offset++];
|
|
|
|
|
|
|
|
|
|
if ((length & 0x80) == 0) // short form
|
|
|
|
|
{
|
|
|
|
|
return length;
|
|
|
|
|
}
|
|
|
|
|
int bytesCount = length & 0x7F;
|
|
|
|
|
if (bytesCount <= 0 || bytesCount > 4) throw new Exception("Invalid length bytes");
|
|
|
|
|
if (offset + bytesCount > data.Length) throw new Exception("Invalid length (overflow)");
|
|
|
|
|
int val = 0;
|
|
|
|
|
for (int i = 0; i < bytesCount; i++)
|
|
|
|
|
{
|
|
|
|
|
val = (val << 8) | data[offset++];
|
|
|
|
|
}
|
|
|
|
|
return val;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
private static string GetHexSnippet(byte[] data, int offset, int maxLen)
|
|
|
|
|
{
|
|
|
|
|
int start = Math.Max(0, offset - 6);
|
|
|
|
|
int end = Math.Min(data.Length, offset + maxLen);
|
|
|
|
|
System.Text.StringBuilder sb = new System.Text.StringBuilder();
|
|
|
|
|
for (int i = start; i < end; i++)
|
|
|
|
|
{
|
|
|
|
|
sb.AppendFormat("{0:X2} ", data[i]);
|
|
|
|
|
}
|
|
|
|
|
return sb.ToString().Trim();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 私钥解密
|
|
|
|
|
public static string Decrypt(string cipherText)
|
|
|
|
|
{
|
|
|
|
|
using (RSACryptoServiceProvider rsa = RSAHelper.CreateFromBase64PublicKey(privateKey))
|
|
|
|
|
using (RSACryptoServiceProvider rsa = RSAHelper.LoadPrivateKeyFromBase64(privateKey))
|
|
|
|
|
{
|
|
|
|
|
byte[] data = Convert.FromBase64String(cipherText);
|
|
|
|
|
byte[] dec = rsa.Decrypt(data, false);
|
|
|
|
|
|
