sshd-common/src/main/java/org/apache/sshd/common/signature/SignatureDSA.java [55:79]:
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    @Override
    public byte[] sign(SessionContext session) throws Exception {
        byte[] sig = super.sign(session);

        try (DERParser parser = new DERParser(sig)) {
            int type = parser.read();
            if (type != 0x30) {
                throw new StreamCorruptedException(
                        "Invalid signature format - not a DER SEQUENCE: 0x" + Integer.toHexString(type));
            }

            // length of remaining encoding of the 2 integers
            int remainLen = parser.readLength();
            /*
             * There are supposed to be 2 INTEGERs, each encoded with:
             *
             * - one byte representing the fact that it is an INTEGER - one byte of the integer encoding length - at
             * least one byte of integer data (zero length is not an option)
             */
            if (remainLen < (2 * 3)) {
                throw new StreamCorruptedException("Invalid signature format - not enough encoded data length: " + remainLen);
            }

            BigInteger r = parser.readBigInteger();
            BigInteger s = parser.readBigInteger();
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sshd-common/src/main/java/org/apache/sshd/common/signature/SignatureECDSA.java [68:92]:
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    @Override
    public byte[] sign(SessionContext session) throws Exception {
        byte[] sig = super.sign(session);

        try (DERParser parser = new DERParser(sig)) {
            int type = parser.read();
            if (type != 0x30) {
                throw new StreamCorruptedException(
                        "Invalid signature format - not a DER SEQUENCE: 0x" + Integer.toHexString(type));
            }

            // length of remaining encoding of the 2 integers
            int remainLen = parser.readLength();
            /*
             * There are supposed to be 2 INTEGERs, each encoded with:
             *
             * - one byte representing the fact that it is an INTEGER - one byte of the integer encoding length - at
             * least one byte of integer data (zero length is not an option)
             */
            if (remainLen < (2 * 3)) {
                throw new StreamCorruptedException("Invalid signature format - not enough encoded data length: " + remainLen);
            }

            BigInteger r = parser.readBigInteger();
            BigInteger s = parser.readBigInteger();
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