public static PrivateKey parse()

in jsign-core/src/main/java/net/jsign/PVK.java [65:96]

• 25 lines of code
• 3 McCabe index (conditional complexity)

    public static PrivateKey parse(ByteBuffer buffer, String password) throws GeneralSecurityException {
        buffer.order(ByteOrder.LITTLE_ENDIAN);
        buffer.rewind();
        
        long magic = buffer.getInt() & 0xFFFFFFFFL;
        if (PVK_MAGIC != magic) {
            throw new IllegalArgumentException("PVK header signature not found");
        }
        
        buffer.position(buffer.position() + 4); // reserved
        int keyType = buffer.getInt();
        boolean encrypted = buffer.getInt() != 0;
        int saltLength = buffer.getInt();
        int keyLength = buffer.getInt();
        byte[] salt = new byte[saltLength];
        buffer.get(salt);
        
        // BLOBHEADER structure: https://msdn.microsoft.com/en-us/library/cc235198.aspx
        byte btype = buffer.get();
        byte version = buffer.get();
        buffer.position(buffer.position() + 2); // reserved
        int keyalg = buffer.getInt();
        
        byte[] key = new byte[keyLength - 8];
        buffer.get(key);
        
        if (encrypted) {
            key = decrypt(key, salt, password);
        }
        
        return parseKey(key);
    }