GenerateV1DsaBlob()

static unsafe void System.Security.Cryptography.DSACng.GenerateV1DsaBlob ( out byte[] blob, DSAParameters parameters, int cbKey, bool includePrivate )

inlinestaticprivate

Definition at line 230 of file DSACng.cs.

    {
        int num = sizeof(global::Interop.BCrypt.BCRYPT_DSA_KEY_BLOB) + cbKey + cbKey + cbKey;
        if (includePrivate)
        {
            num += 20;
        }
        blob = new byte[num];
        fixed (byte* ptr = &blob[0])
        {
            global::Interop.BCrypt.BCRYPT_DSA_KEY_BLOB* ptr2 = (global::Interop.BCrypt.BCRYPT_DSA_KEY_BLOB*)ptr;
            ptr2->Magic = (includePrivate ? global::Interop.BCrypt.KeyBlobMagicNumber.BCRYPT_DSA_PRIVATE_MAGIC : global::Interop.BCrypt.KeyBlobMagicNumber.BCRYPT_DSA_PUBLIC_MAGIC);
            ptr2->cbKey = cbKey;
            int offset = 8;
            if (parameters.Seed != null)
            {
                if (parameters.Seed.Length != 20)
                {
                    throw new ArgumentException(System.SR.Cryptography_InvalidDsaParameters_SeedRestriction_ShortKey);
                }
                global::Interop.BCrypt.EmitBigEndian(blob, ref offset, parameters.Counter);
                global::Interop.BCrypt.Emit(blob, ref offset, parameters.Seed);
            }
            else
            {
                global::Interop.BCrypt.EmitByte(blob, ref offset, byte.MaxValue, 24);
            }
            if (parameters.Q.Length != 20)
            {
                throw new ArgumentException(System.SR.Cryptography_InvalidDsaParameters_QRestriction_ShortKey);
            }
            global::Interop.BCrypt.Emit(blob, ref offset, parameters.Q);
            global::Interop.BCrypt.Emit(blob, ref offset, parameters.P);
            global::Interop.BCrypt.Emit(blob, ref offset, parameters.G);
            global::Interop.BCrypt.Emit(blob, ref offset, parameters.Y);
            if (includePrivate)
            {
                global::Interop.BCrypt.Emit(blob, ref offset, parameters.X);
            }
        }
    }

References System.Security.Cryptography.DSAParameters.Counter, System.SR.Cryptography_InvalidDsaParameters_QRestriction_ShortKey, System.SR.Cryptography_InvalidDsaParameters_SeedRestriction_ShortKey, System.Security.Cryptography.DSAParameters.G, System.offset, System.Security.Cryptography.DSAParameters.P, System.Security.Cryptography.DSAParameters.Q, System.Security.Cryptography.DSAParameters.Seed, System.Security.Cryptography.DSAParameters.X, and System.Security.Cryptography.DSAParameters.Y.

Referenced by System.Security.Cryptography.DSACng.ImportParameters().