ssh-audit/src/ssh_audit/ssh2_kexdb.py

"""
   The MIT License (MIT)

   Copyright (C) 2017-2023 Joe Testa (jtesta@positronsecurity.com)
   Copyright (C) 2017 Andris Raugulis (moo@arthepsy.eu)

   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   THE SOFTWARE.
"""
# pylint: disable=unused-import
from typing import Dict, List, Set, Sequence, Tuple, Iterable  # noqa: F401
from typing import Callable, Optional, Union, Any  # noqa: F401


class SSH2_KexDB:  # pylint: disable=too-few-public-methods
    FAIL_OPENSSH70_LEGACY = 'removed since OpenSSH 7.0, legacy algorithm'
    FAIL_OPENSSH70_WEAK = 'removed (in server) and disabled (in client) since OpenSSH 7.0, weak algorithm'
    FAIL_OPENSSH70_LOGJAM = 'disabled (in client) since OpenSSH 7.0, logjam attack'
    FAIL_OPENSSH67_UNSAFE = 'removed (in server) since OpenSSH 6.7, unsafe algorithm'
    FAIL_OPENSSH61_REMOVE = 'removed since OpenSSH 6.1, removed from specification'
    FAIL_OPENSSH31_REMOVE = 'removed since OpenSSH 3.1'
    FAIL_DBEAR67_DISABLED = 'disabled since Dropbear SSH 2015.67'
    FAIL_DBEAR53_DISABLED = 'disabled since Dropbear SSH 0.53'
    FAIL_DEPRECATED_CIPHER = 'deprecated cipher'
    FAIL_WEAK_CIPHER = 'using weak cipher'
    FAIL_WEAK_ALGORITHM = 'using weak/obsolete algorithm'
    FAIL_PLAINTEXT = 'no encryption/integrity'
    FAIL_DEPRECATED_MAC = 'deprecated MAC'
    FAIL_1024BIT_MODULUS = 'using small 1024-bit modulus'
    FAIL_UNPROVEN = 'using unproven algorithm'
    FAIL_HASH_WEAK = 'using weak hashing algorithm'
    FAIL_SMALL_ECC_MODULUS = 'using small ECC modulus'
    FAIL_UNKNOWN = 'using unknown algorithm'

    WARN_CURVES_WEAK = 'using weak elliptic curves'
    WARN_RNDSIG_KEY = 'using weak random number generator could reveal the key'
    WARN_HASH_WEAK = 'using weak hashing algorithm'
    WARN_CIPHER_MODE = 'using weak cipher mode'
    WARN_BLOCK_SIZE = 'using small 64-bit block size'
    WARN_CIPHER_WEAK = 'using weak cipher'
    WARN_ENCRYPT_AND_MAC = 'using encrypt-and-MAC mode'
    WARN_TAG_SIZE = 'using small 64-bit tag size'
    WARN_TAG_SIZE_96 = 'using small 96-bit tag size'
    WARN_EXPERIMENTAL = 'using experimental algorithm'
    WARN_OBSOLETE = 'using obsolete algorithm'
    WARN_UNTRUSTED = 'using untrusted algorithm'
    WARN_OPENSSH74_UNSAFE = 'disabled (in client) since OpenSSH 7.4, unsafe algorithm'
    WARN_OPENSSH72_LEGACY = 'disabled (in client) since OpenSSH 7.2, legacy algorithm'

    INFO_OPENSSH82_FUTURE_DEPRECATION = 'a future deprecation notice has been issued in OpenSSH 8.2: https://www.openssh.com/txt/release-8.2'
    INFO_OPENSSH69_CHACHA = 'default cipher since OpenSSH 6.9.'
    INFO_NEVER_IMPLEMENTED_IN_OPENSSH = 'despite the @openssh.com tag, this was never implemented in OpenSSH'


    ALGORITHMS: Dict[str, Dict[str, List[List[Optional[str]]]]] = {
        # Format: 'algorithm_name': [['version_first_appeared_in'], [reason_for_failure1, reason_for_failure2, ...], [warning1, warning2, ...]]
        'kex': {
            'diffie-hellman-group1-sha1': [['2.3.0,d0.28,l10.2', '6.6', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH67_UNSAFE, FAIL_OPENSSH70_LOGJAM], [WARN_HASH_WEAK]],
            'gss-group1-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH67_UNSAFE, FAIL_OPENSSH70_LOGJAM], [WARN_HASH_WEAK]],
            'gss-gex-sha1-eipGX3TCiQSrx573bT1o1Q==': [[], [], [WARN_HASH_WEAK]],
            'gss-gex-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [], [WARN_HASH_WEAK]],
            'gss-gex-sha1-': [[], [], [WARN_HASH_WEAK]],
            'gss-group1-sha1-eipGX3TCiQSrx573bT1o1Q==': [[], [FAIL_1024BIT_MODULUS], [WARN_HASH_WEAK]],
            'gss-group1-sha1-': [[], [FAIL_1024BIT_MODULUS], [WARN_HASH_WEAK]],
            'gss-group14-sha1-': [[], [], [WARN_HASH_WEAK]],
            'gss-group14-sha1-eipGX3TCiQSrx573bT1o1Q==': [[], [], [WARN_HASH_WEAK]],
            'gss-group14-sha1-toWM5Slw5Ew8Mqkay+al2g==': [[], [], [WARN_HASH_WEAK]],
            'gss-group14-sha256-': [[]],
            'gss-group14-sha256-toWM5Slw5Ew8Mqkay+al2g==': [[]],
            'gss-group15-sha512-': [[]],
            'gss-group15-sha512-toWM5Slw5Ew8Mqkay+al2g==': [[]],
            'gss-group16-sha512-': [[]],
            'gss-nistp256-sha256-': [[], [WARN_CURVES_WEAK]],
            'gss-curve25519-sha256-': [[]],
            'gss-13.3.132.0.10-sha256-*': [[], [FAIL_UNKNOWN]],
            'gss-curve25519-sha256-*': [[]],
            'gss-curve448-sha512-*': [[]],
            'gss-gex-sha1-*': [[], [], [WARN_HASH_WEAK]],
            'gss-gex-sha256-*': [[]],
            'gss-group1-sha1-*': [[], [], [WARN_HASH_WEAK]],
            'gss-group14-sha1-*': [[], [], [WARN_HASH_WEAK]],
            'gss-group14-sha256-*': [[]],
            'gss-group15-sha512-*': [[]],
            'gss-group16-sha512-*': [[]],
            'gss-group17-sha512-*': [[]],
            'gss-group18-sha512-*': [[]],
            'gss-nistp256-sha256-*': [[], [WARN_CURVES_WEAK]],
            'gss-nistp384-sha256-*': [[], [WARN_CURVES_WEAK]],
            'gss-nistp521-sha512-*': [[], [WARN_CURVES_WEAK]],
            'diffie-hellman-group1-sha256': [[], [FAIL_1024BIT_MODULUS]],
            'diffie-hellman-group14-sha1': [['3.9,d0.53,l10.6.0'], [], [WARN_HASH_WEAK]],
            'diffie-hellman-group14-sha256': [['7.3,d2016.73']],
            'diffie-hellman-group14-sha256@ssh.com': [[]],
            'diffie-hellman-group15-sha256': [[]],
            'diffie-hellman-group15-sha256@ssh.com': [[]],
            'diffie-hellman-group15-sha384@ssh.com': [[]],
            'diffie-hellman-group15-sha512': [[]],
            'diffie-hellman-group16-sha256': [[]],
            'diffie-hellman-group16-sha384@ssh.com': [[]],
            'diffie-hellman-group16-sha512': [['7.3,d2016.73']],
            'diffie-hellman-group16-sha512@ssh.com': [[]],
            'diffie-hellman-group17-sha512': [[]],
            'diffie-hellman-group18-sha512': [['7.3']],
            'diffie-hellman-group18-sha512@ssh.com': [[]],
            'diffie-hellman-group-exchange-sha1': [['2.3.0', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_HASH_WEAK]],
            'diffie-hellman-group-exchange-sha256': [['4.4']],
            'diffie-hellman-group-exchange-sha256@ssh.com': [[]],
            'diffie-hellman-group-exchange-sha512@ssh.com': [[]],
            'diffie-hellman-group-exchange-sha224@ssh.com': [[]],
            'diffie-hellman-group-exchange-sha384@ssh.com': [[]],
            'diffie-hellman-group14-sha224@ssh.com': [[]],
            'diffie-hellman_group17-sha512': [[]],
            'ecmqv-sha2': [[], [FAIL_UNPROVEN]],
            'ecdh-sha2-curve25519': [[], []],
            'ecdh-sha2-nistb233': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistb409': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistk163': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistk233': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistk283': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistk409': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistp192': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistp224': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistp256': [['5.7,d2013.62,l10.6.0'], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistp384': [['5.7,d2013.62'], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistp521': [['5.7,d2013.62'], [WARN_CURVES_WEAK]],
            'ecdh-sha2-nistt571': [[], [WARN_CURVES_WEAK]],
            'ecdh-sha2-1.3.132.0.10': [[]],  # ECDH over secp256k1 (i.e.: the Bitcoin curve)

            # Note: the base64 strings, according to draft 6 of RFC5656, is Base64(MD5(DER(OID))).  The final RFC5656 dropped the base64 strings in favor of plain OID concatenation, but apparently some SSH servers implement them anyway.  See: https://datatracker.ietf.org/doc/html/draft-green-secsh-ecc-06#section-9.2
            'ecdh-sha2-1.3.132.0.1': [[], [FAIL_SMALL_ECC_MODULUS]],  # sect163k1
            'ecdh-sha2-4MHB+NBt3AlaSRQ7MnB4cg==': [[], [FAIL_SMALL_ECC_MODULUS]],  # sect163k1
            'ecdh-sha2-1.2.840.10045.3.1.1': [[], [FAIL_SMALL_ECC_MODULUS, WARN_CURVES_WEAK]],  # NIST P-192 / secp192r1
            'ecdh-sha2-5pPrSUQtIaTjUSt5VZNBjg==': [[], [FAIL_SMALL_ECC_MODULUS, WARN_CURVES_WEAK]],  # NIST P-192 / secp192r1
            'ecdh-sha2-1.3.132.0.33': [[], [FAIL_SMALL_ECC_MODULUS, WARN_CURVES_WEAK]],  # NIST P-224 / secp224r1
            'ecdh-sha2-VqBg4QRPjxx1EXZdV0GdWQ==': [[], [FAIL_SMALL_ECC_MODULUS, WARN_CURVES_WEAK]],  # NIST P-224 / secp224r1
            'ecdh-sha2-1.3.132.0.26': [[], [FAIL_SMALL_ECC_MODULUS]],  # sect233k1
            'ecdh-sha2-zD/b3hu/71952ArpUG4OjQ==': [[], [FAIL_SMALL_ECC_MODULUS]],  # sect233k1
            'ecdh-sha2-1.3.132.0.27': [[], [FAIL_SMALL_ECC_MODULUS, WARN_CURVES_WEAK]],  # sect233r1
            'ecdh-sha2-qCbG5Cn/jjsZ7nBeR7EnOA==': [[FAIL_SMALL_ECC_MODULUS, WARN_CURVES_WEAK]],  # sect233r1
            'ecdh-sha2-1.2.840.10045.3.1.7': [[], [WARN_CURVES_WEAK]],  # NIST P-256 / secp256r1
            'ecdh-sha2-9UzNcgwTlEnSCECZa7V1mw==': [[], [WARN_CURVES_WEAK]],  # NIST P-256 / secp256r1
            'ecdh-sha2-1.3.132.0.16': [[]],  # sect283k1
            'ecdh-sha2-wiRIU8TKjMZ418sMqlqtvQ==': [[]],  # sect283k1
            'ecdh-sha2-1.3.132.0.34': [[], [WARN_CURVES_WEAK]],  # NIST P-384 / secp384r1
            'ecdh-sha2-qcFQaMAMGhTziMT0z+Tuzw==': [[], [WARN_CURVES_WEAK]],  # NIST P-384 / secp384r1
            'ecdh-sha2-1.3.132.0.36': [[]],  # sect409k1
            'ecdh-sha2-m/FtSAmrV4j/Wy6RVUaK7A==': [[]],  # sect409k1
            'ecdh-sha2-1.3.132.0.37': [[], [WARN_CURVES_WEAK]],  # sect409r1
            'ecdh-sha2-D3FefCjYoJ/kfXgAyLddYA==': [[], [WARN_CURVES_WEAK]],  # sect409r1
            'ecdh-sha2-1.3.132.0.35': [[], [WARN_CURVES_WEAK]],  # NIST P-521 / secp521r1
            'ecdh-sha2-h/SsxnLCtRBh7I9ATyeB3A==': [[], [WARN_CURVES_WEAK]],  # NIST P-521 / secp521r1
            'ecdh-sha2-1.3.132.0.38': [[]],  # sect571k1
            'ecdh-sha2-mNVwCXAoS1HGmHpLvBC94w==': [[]],  # sect571k1
            'curve25519-sha256@libssh.org': [['6.5,d2013.62,l10.6.0']],
            'curve25519-sha256': [['7.4,d2018.76']],
            'curve448-sha512': [[]],
            'kexguess2@matt.ucc.asn.au': [['d2013.57']],
            'rsa1024-sha1': [[], [FAIL_1024BIT_MODULUS], [WARN_HASH_WEAK]],
            'rsa2048-sha256': [[]],
            'sntrup4591761x25519-sha512@tinyssh.org': [['8.0', '8.4'], [], [WARN_EXPERIMENTAL]],
            'sntrup761x25519-sha512@openssh.com': [['8.5'], [], []],
            'kexAlgoCurve25519SHA256': [[]],
            'Curve25519SHA256': [[]],
            'ext-info-c': [[]],  # Extension negotiation (RFC 8308)
            'ext-info-s': [[]],  # Extension negotiation (RFC 8308)
            'm383-sha384@libassh.org': [[], [FAIL_UNPROVEN]],
            'm511-sha512@libassh.org': [[], [FAIL_UNPROVEN]],
        },
        'key': {
            'ssh-rsa1': [[], [FAIL_WEAK_ALGORITHM]],
            'rsa-sha2-256': [['7.2']],
            'rsa-sha2-512': [['7.2']],
            'ssh-ed25519': [['6.5,l10.7.0']],
            'ssh-ed25519-cert-v01@openssh.com': [['6.5']],
            'ssh-rsa': [['2.5.0,d0.28,l10.2'], [FAIL_HASH_WEAK], [], [INFO_OPENSSH82_FUTURE_DEPRECATION]],
            'ssh-dss': [['2.1.0,d0.28,l10.2', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
            'ecdsa-sha2-nistp256': [['5.7,d2013.62,l10.6.4'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'ecdsa-sha2-nistp384': [['5.7,d2013.62,l10.6.4'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'ecdsa-sha2-nistp521': [['5.7,d2013.62,l10.6.4'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'ecdsa-sha2-1.3.132.0.10': [[], [], [WARN_RNDSIG_KEY]],  # ECDSA over secp256k1 (i.e.: the Bitcoin curve)
            'x509v3-sign-dss': [[], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
            'x509v3-sign-rsa': [[], [FAIL_HASH_WEAK], [], [INFO_OPENSSH82_FUTURE_DEPRECATION]],
            'x509v3-sign-rsa-sha256@ssh.com': [[]],
            'x509v3-ssh-dss': [[], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
            'x509v3-ssh-rsa': [[], [FAIL_HASH_WEAK], [], [INFO_OPENSSH82_FUTURE_DEPRECATION]],
            'ssh-rsa-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_OPENSSH70_LEGACY, FAIL_HASH_WEAK], [], [INFO_OPENSSH82_FUTURE_DEPRECATION]],
            'ssh-dss-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_LEGACY], [WARN_RNDSIG_KEY]],
            'ssh-rsa-cert-v01@openssh.com': [['5.6'], [FAIL_HASH_WEAK], [], [INFO_OPENSSH82_FUTURE_DEPRECATION]],
            'ssh-dss-cert-v01@openssh.com': [['5.6', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_OPENSSH70_WEAK], [WARN_RNDSIG_KEY]],
            'ecdsa-sha2-nistp256-cert-v01@openssh.com': [['5.7'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'ecdsa-sha2-nistp384-cert-v01@openssh.com': [['5.7'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'ecdsa-sha2-nistp521-cert-v01@openssh.com': [['5.7'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'rsa-sha2-256-cert-v01@openssh.com': [['7.8']],
            'rsa-sha2-512-cert-v01@openssh.com': [['7.8']],
            'ssh-rsa-sha256@ssh.com': [[]],
            'ssh-dss-sha256@ssh.com': [[], [FAIL_1024BIT_MODULUS]],
            'sk-ecdsa-sha2-nistp256-cert-v01@openssh.com': [['8.2'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'sk-ecdsa-sha2-nistp256@openssh.com': [['8.2'], [WARN_CURVES_WEAK], [WARN_RNDSIG_KEY]],
            'sk-ssh-ed25519-cert-v01@openssh.com': [['8.2']],
            'sk-ssh-ed25519@openssh.com': [['8.2']],
            'ssh-gost2001': [[], [], [WARN_UNTRUSTED]],
            'ssh-gost2012-256': [[], [], [WARN_UNTRUSTED]],
            'ssh-gost2012-512': [[], [], [WARN_UNTRUSTED]],
            'spi-sign-rsa': [[]],
            'ssh-ed448': [[]],
            'x509v3-ecdsa-sha2-nistp256': [[], [WARN_CURVES_WEAK]],
            'x509v3-ecdsa-sha2-nistp384': [[], [WARN_CURVES_WEAK]],
            'x509v3-ecdsa-sha2-nistp521': [[], [WARN_CURVES_WEAK]],
            'x509v3-rsa2048-sha256': [[]],
            'webauthn-sk-ecdsa-sha2-nistp256@openssh.com': [['8.3'], [WARN_CURVES_WEAK]],
            'ssh-xmss@openssh.com': [['7.7'], [WARN_EXPERIMENTAL]],
            'ssh-xmss-cert-v01@openssh.com': [['7.7'], [WARN_EXPERIMENTAL]],
            'dsa2048-sha224@libassh.org': [[], [FAIL_UNPROVEN]],
            'dsa2048-sha256@libassh.org': [[], [FAIL_UNPROVEN]],
            'dsa3072-sha256@libassh.org': [[], [FAIL_UNPROVEN]],
            'ecdsa-sha2-1.3.132.0.10-cert-v01@openssh.com': [[], [FAIL_UNKNOWN]],
            'eddsa-e382-shake256@libassh.org': [[], [FAIL_UNPROVEN]],
            'eddsa-e521-shake256@libassh.org': [[], [FAIL_UNPROVEN]],
            'null': [[], [FAIL_PLAINTEXT]],
            'pgp-sign-dss': [[], [FAIL_1024BIT_MODULUS]],
            'pgp-sign-rsa': [[], [FAIL_1024BIT_MODULUS]],
        },
        'enc': {
            'none': [['1.2.2,d2013.56,l10.2'], [FAIL_PLAINTEXT]],
            'des': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            'des-cbc': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            'des-cbc@ssh.com': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            'des-cbc-ssh1': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            '3des': [[], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH74_UNSAFE, WARN_CIPHER_WEAK, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            '3des-cbc': [['1.2.2,d0.28,l10.2', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH74_UNSAFE, WARN_CIPHER_WEAK, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            '3des-ctr': [['d0.52'], [FAIL_WEAK_CIPHER]],
            'blowfish': [[], [FAIL_WEAK_ALGORITHM], [WARN_BLOCK_SIZE]],
            'blowfish-cbc': [['1.2.2,d0.28,l10.2', '6.6,d0.52', '7.1,d0.52'], [FAIL_OPENSSH67_UNSAFE, FAIL_DBEAR53_DISABLED], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            'blowfish-ctr': [[], [FAIL_OPENSSH67_UNSAFE, FAIL_DBEAR53_DISABLED], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            'twofish-cbc': [['d0.28', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [WARN_CIPHER_MODE]],
            'twofish128-cbc': [['d0.47', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [WARN_CIPHER_MODE]],
            'twofish192-cbc': [[], [], [WARN_CIPHER_MODE]],
            'twofish256-cbc': [['d0.47', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [WARN_CIPHER_MODE]],
            'twofish-ctr': [[]],
            'twofish128-ctr': [['d2015.68']],
            'twofish192-ctr': [[]],
            'twofish256-ctr': [['d2015.68']],
            'serpent128-cbc': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'serpent192-cbc': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'serpent256-cbc': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'serpent128-ctr': [[], [FAIL_DEPRECATED_CIPHER]],
            'serpent192-ctr': [[], [FAIL_DEPRECATED_CIPHER]],
            'serpent256-ctr': [[], [FAIL_DEPRECATED_CIPHER]],
            'idea-cbc': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'idea-ctr': [[], [FAIL_DEPRECATED_CIPHER]],
            'cast128-ctr': [[], [FAIL_DEPRECATED_CIPHER]],
            'cast128-cbc': [['2.1.0', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_MODE, WARN_BLOCK_SIZE]],
            'arcfour': [['2.1.0', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_WEAK]],
            'arcfour128': [['4.2', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_WEAK]],
            'arcfour256': [['4.2', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_WEAK]],
            'aes128-cbc': [['2.3.0,d0.28,l10.2', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_CIPHER_MODE]],
            'aes192-cbc': [['2.3.0,l10.2', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_CIPHER_MODE]],
            'aes256-cbc': [['2.3.0,d0.47,l10.2', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_CIPHER_MODE]],
            'rijndael128-cbc': [['2.3.0', '3.0.2'], [FAIL_OPENSSH31_REMOVE], [WARN_CIPHER_MODE]],
            'rijndael192-cbc': [['2.3.0', '3.0.2'], [FAIL_OPENSSH31_REMOVE], [WARN_CIPHER_MODE]],
            'rijndael256-cbc': [['2.3.0', '3.0.2'], [FAIL_OPENSSH31_REMOVE], [WARN_CIPHER_MODE]],
            'rijndael-cbc@lysator.liu.se': [['2.3.0', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_CIPHER_MODE]],
            'aes128-ctr': [['3.7,d0.52,l10.4.1']],
            'aes192-ctr': [['3.7,l10.4.1']],
            'aes256-ctr': [['3.7,d0.52,l10.4.1']],
            'aes128-gcm': [[]],
            'aes256-gcm': [[]],
            'AEAD_AES_128_GCM': [[]],
            'AEAD_AES_256_GCM': [[]],
            'aes128-gcm@openssh.com': [['6.2']],
            'aes256-gcm@openssh.com': [['6.2']],
            'chacha20-poly1305': [[], [], [], [INFO_OPENSSH69_CHACHA]],
            'chacha20-poly1305@openssh.com': [['6.5'], [], [], [INFO_OPENSSH69_CHACHA]],
            'camellia128-cbc': [[], [], [WARN_CIPHER_MODE]],
            'camellia128-ctr': [[]],
            'camellia192-cbc': [[], [], [WARN_CIPHER_MODE]],
            'camellia192-ctr': [[]],
            'camellia256-cbc': [[], [], [WARN_CIPHER_MODE]],
            'camellia256-ctr': [[]],
            'crypticore128@ssh.com': [[], [FAIL_UNPROVEN]],
            'seed-cbc@ssh.com': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            '3des-cfb': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE]],
            '3des-ecb': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE]],
            '3des-ofb': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE]],
            'blowfish-cfb': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE]],
            'blowfish-ecb': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE]],
            'blowfish-ofb': [[], [FAIL_WEAK_CIPHER], [WARN_CIPHER_MODE]],
            'camellia128-cbc@openssh.org': [[], [], [WARN_CIPHER_MODE]],
            'camellia128-ctr@openssh.org': [[]],
            'camellia192-cbc@openssh.org': [[], [], [WARN_CIPHER_MODE]],
            'camellia192-ctr@openssh.org': [[]],
            'camellia256-cbc@openssh.org': [[], [], [WARN_CIPHER_MODE]],
            'camellia256-ctr@openssh.org': [[]],
            'cast128-cfb': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'cast128-ecb': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'cast128-ofb': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'idea-cfb': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'idea-ecb': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'idea-ofb': [[], [FAIL_DEPRECATED_CIPHER], [WARN_CIPHER_MODE]],
            'seed-ctr@ssh.com': [[], [FAIL_DEPRECATED_CIPHER]],
            'serpent128-gcm@libassh.org': [[], [FAIL_DEPRECATED_CIPHER]],
            'serpent256-gcm@libassh.org': [[], [FAIL_DEPRECATED_CIPHER]],
            'twofish-cfb': [[], [], [WARN_CIPHER_MODE]],
            'twofish-ecb': [[], [], [WARN_CIPHER_MODE]],
            'twofish-ofb': [[], [], [WARN_CIPHER_MODE]],
            'twofish128-gcm@libassh.org': [[]],
            'twofish256-gcm@libassh.org': [[]],
        },
        'mac': {
            'none': [['d2013.56'], [FAIL_PLAINTEXT]],
            'hmac-sha1': [['2.1.0,d0.28,l10.2'], [], [WARN_ENCRYPT_AND_MAC, WARN_HASH_WEAK]],
            'hmac-sha1-96': [['2.5.0,d0.47', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_ENCRYPT_AND_MAC, WARN_HASH_WEAK]],
            'hmac-sha1-96@openssh.com': [[], [], [WARN_TAG_SIZE, WARN_ENCRYPT_AND_MAC, WARN_HASH_WEAK], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]],
            'hmac-sha2-56': [[], [], [WARN_TAG_SIZE, WARN_ENCRYPT_AND_MAC]],
            'hmac-sha2-224': [[], [], [WARN_TAG_SIZE, WARN_ENCRYPT_AND_MAC]],
            'hmac-sha2-256': [['5.9,d2013.56,l10.7.0'], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha2-256-96': [['5.9', '6.0'], [FAIL_OPENSSH61_REMOVE], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha2-384': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha2-512': [['5.9,d2013.56,l10.7.0'], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha2-512-96': [['5.9', '6.0'], [FAIL_OPENSSH61_REMOVE], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha3-224': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha3-256': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha3-384': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha3-512': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha256': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha256-96@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE]],
            'hmac-sha256@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha512': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha512@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-md5': [['2.1.0,d0.28', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_ENCRYPT_AND_MAC, WARN_HASH_WEAK]],
            'hmac-md5-96': [['2.5.0', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_ENCRYPT_AND_MAC, WARN_HASH_WEAK]],
            'hmac-ripemd': [[], [FAIL_DEPRECATED_MAC], [WARN_OPENSSH72_LEGACY, WARN_ENCRYPT_AND_MAC]],
            'hmac-ripemd160': [['2.5.0', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_ENCRYPT_AND_MAC]],
            'hmac-ripemd160-96': [[], [FAIL_DEPRECATED_MAC], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE]],
            'hmac-ripemd160@openssh.com': [['2.1.0', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_ENCRYPT_AND_MAC]],
            'umac-64@openssh.com': [['4.7'], [], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE]],
            'umac-128@openssh.com': [['6.2'], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha1-etm@openssh.com': [['6.2'], [], [WARN_HASH_WEAK]],
            'hmac-sha1-96-etm@openssh.com': [['6.2', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [WARN_HASH_WEAK]],
            'hmac-sha2-256-96-etm@openssh.com': [[], [], [WARN_TAG_SIZE_96], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]],  # Only ever implemented in AsyncSSH (?).
            'hmac-sha2-512-96-etm@openssh.com': [[], [], [WARN_TAG_SIZE_96], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]],  # Only ever implemented in AsyncSSH (?).
            'hmac-sha2-256-etm@openssh.com': [['6.2']],
            'hmac-sha2-512-etm@openssh.com': [['6.2']],
            'hmac-md5-etm@openssh.com': [['6.2', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_HASH_WEAK]],
            'hmac-md5-96-etm@openssh.com': [['6.2', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY, WARN_HASH_WEAK]],
            'hmac-ripemd160-etm@openssh.com': [['6.2', '6.6', '7.1'], [FAIL_OPENSSH67_UNSAFE], [WARN_OPENSSH72_LEGACY]],
            'umac-32@openssh.com': [[], [], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]],
            'umac-64-etm@openssh.com': [['6.2'], [], [WARN_TAG_SIZE]],
            'umac-96@openssh.com': [[], [], [WARN_ENCRYPT_AND_MAC], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]],
            'umac-128-etm@openssh.com': [['6.2']],
            'aes128-gcm': [[]],
            'aes256-gcm': [[]],
            'chacha20-poly1305@openssh.com': [[], [], [], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]],  # Despite the @openssh.com tag, this was never shipped as a MAC in OpenSSH (only as a cipher); it is only implemented as a MAC in Syncplify.
            'crypticore-mac@ssh.com': [[], [FAIL_UNPROVEN]],
            'AEAD_AES_128_GCM': [[]],
            'AEAD_AES_256_GCM': [[]],
            'hmac-sha224@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha256-2@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-sha384@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]],
            'hmac-whirlpool': [[], [], [WARN_ENCRYPT_AND_MAC]],
        }
    }