Problem with GOST2012 key - can't read it.

[keymsr]

We have private key (GOST3410-2012, alg.id 1.2.643.7.1.1.1.1). But we can't read it using BouncyCastle 1.8.6.1

Here is a key data:

-----BEGIN PRIVATE KEY----- MIGiAgEAMCEGCCqFAwcBAQECMBUGCSqFAwcBAgECAQYIKoUDBwEBAgMEQIXnWrZ6 ajvbCU6x9jK49PgQqCP00T/lW3laXCXueMF8X4Q1y3N9zfOJT2s/IgyPJVrUhgtO 1Akp+Roh8bCPPlqgODA2BggqhQMCCQMIATEqBCi72ZvrBVW6mFL/bQeXeMTf8Jh8 p/diI7Cg8ig4mXg3tsIUf4vBi61b -----END PRIVATE KEY-----

And here is a code to read it:

    const string keyPath = "D:\\testkey\\priv.key";
    using (var textReader = File.OpenText(keyPath))
    {
        var pemReader = new Org.BouncyCastle.OpenSsl.PemReader(textReader);
        var pemObj = pemReader.ReadPemObject();
        var seq = (Asn1Sequence)Asn1Object.FromByteArray(pemObj.Content);
        var keyInfo = PrivateKeyInfo.GetInstance(seq);
        var akp = Org.BouncyCastle.Security.PrivateKeyFactory.CreateKey(keyInfo);
    }

this code provide exception: "DER length more than 4 bytes: 103". Does anyone knows how to read it?

This watHave tried this way:

        using (var textReader = File.OpenText(filename))
        {
            var pemReader = new Org.BouncyCastle.OpenSsl.PemReader(textReader);
            var pemObj = pemReader.ReadPemObject();
            var seq = (Org.BouncyCastle.Asn1.Asn1Sequence)Org.BouncyCastle.Asn1.Asn1Object.FromByteArray(pemObj.Content);
            var keyInfo = PrivateKeyInfo.GetInstance(seq);
            Org.BouncyCastle.Asn1.X509.AlgorithmIdentifier algID = keyInfo.PrivateKeyAlgorithm;
            Org.BouncyCastle.Asn1.DerObjectIdentifier algOid = algID.ObjectID;
            if (algOid.Equals(Org.BouncyCastle.Asn1.Rosstandart.RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256))
            {
                var gostParams = new Gost3410PublicKeyAlgParameters(
                Org.BouncyCastle.Asn1.Asn1Sequence.GetInstance(algID.Parameters.ToAsn1Object()));
                var i = (Org.BouncyCastle.Asn1.DerInteger)keyInfo.ParsePrivateKey();
            }
            pemReader.ReadObject();
        }

And now have exception: corrupted stream - "out of bounds length found: 47 >= 32"

Old GOST keys (GOST3410-2001) works ok.

Thanks for the report. This should now be fixed. You'll need to pick up:

crypto/src/asn1/pkcs/PrivateKeyInfo.cs
crypto/src/security/PrivateKeyFactory.cs

Should be appearing here on github shortly.