public RsaCryptoHelper(PKCSType pkcsType, string publicKey, string privateKey)
{
this.pkcsType = pkcsType;
publicKey = publicKey.Trim('\n');
privateKey = privateKey.Trim('\n');
if (publicKey.StartsWith("----"))
{
int fidx = publicKey.IndexOf("\n");
int lidx = publicKey.LastIndexOf("\n");
publicKey = publicKey.Substring(fidx + 1, lidx - 1 - fidx).Replace("\n", "");
}
this.publicKey = Convert.FromBase64String(publicKey);
if (privateKey.StartsWith("----"))
{
int fidx = privateKey.IndexOf("\n");
int lidx = privateKey.LastIndexOf("\n");
privateKey = privateKey.Substring(fidx + 1, lidx - 1 - fidx).Replace("\n", "");
}
this.privateKey = Convert.FromBase64String(privateKey);
}
public static RSAParameters DecodePkcsPrivateKey(string privateKey)
{
if (string.IsNullOrEmpty(privateKey))
{
throw new ArgumentNullException("pemFileConent", "This arg cann't be empty.");
}
try
{
privateKey = privateKey.Replace("-----BEGIN RSA PRIVATE KEY-----", "").Replace("-----END RSA PRIVATE KEY-----", "").Replace("\n", "").Replace("\r", "");
var privateKeyData = Convert.FromBase64String(privateKey);
//解析Pkcs证书
PKCSType type = GetPrivateKeyType(privateKeyData.Length);
if (type == PKCSType.PKCS_8_1024 || type == PKCSType.PKCS_8_2048)
{
//Pkcs#8秘钥需要特殊处理
privateKeyData = DecodePkcs8PrivateKey(privateKeyData);
}
var rsaParams = new RSAParameters();
byte bt = 0;
ushort twobytes = 0;
//转换为二进制值
using (var binr = new BinaryReader(new MemoryStream(privateKeyData)))
{
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130)
{
binr.ReadByte();
}
else if (twobytes == 0x8230)
{
binr.ReadInt16();
}
else
{
throw new ArgumentException("Unexpected value read )");
}
twobytes = binr.ReadUInt16();
if (twobytes != 0x0102)
{
throw new ArgumentException("Unexpected version");
}
bt = binr.ReadByte();
if (bt != 0x00)
{
throw new ArgumentException("Unexpected value read ");
}
//转换XML
rsaParams.Modulus = binr.ReadBytes(GetIntegerSize(binr));
rsaParams.Exponent = binr.ReadBytes(GetIntegerSize(binr));
rsaParams.D = binr.ReadBytes(GetIntegerSize(binr));
rsaParams.P = binr.ReadBytes(GetIntegerSize(binr));
rsaParams.Q = binr.ReadBytes(GetIntegerSize(binr));
rsaParams.DP = binr.ReadBytes(GetIntegerSize(binr));
rsaParams.DQ = binr.ReadBytes(GetIntegerSize(binr));
rsaParams.InverseQ = binr.ReadBytes(GetIntegerSize(binr));
}
return(rsaParams);
}
catch (Exception ex)
{
throw new ArgumentException("此私钥证书无效", ex);
}
}
public static void Init(string appid, PKCSType pkcsType, string publicKey, string privateKey)
{
OpenApiClient.appid = appid;
rsaCryptoHelper = new RsaCryptoHelper(pkcsType, publicKey, privateKey);
}
