diff options
Diffstat (limited to 'src/ssh_audit/ssh2_kexdb.py')
| -rw-r--r-- | src/ssh_audit/ssh2_kexdb.py | 468 |
1 files changed, 468 insertions, 0 deletions
diff --git a/src/ssh_audit/ssh2_kexdb.py b/src/ssh_audit/ssh2_kexdb.py new file mode 100644 index 0000000..36130da --- /dev/null +++ b/src/ssh_audit/ssh2_kexdb.py @@ -0,0 +1,468 @@ +""" + 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 +import copy +import threading + +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_1024BIT_MODULUS = 'using small 1024-bit modulus' + FAIL_3DES = 'using broken & deprecated 3DES cipher' + FAIL_BLOWFISH = 'using weak & deprecated Blowfish cipher' + FAIL_CAST = 'using weak & deprecated CAST cipher' + FAIL_DES = 'using broken DES cipher' + FAIL_IDEA = 'using deprecated IDEA cipher' + FAIL_LOGJAM_ATTACK = 'vulnerable to the Logjam attack: https://en.wikipedia.org/wiki/Logjam_(computer_security)' + FAIL_MD5 = 'using broken MD5 hash algorithm' + FAIL_NSA_BACKDOORED_CURVE = 'using elliptic curves that are suspected as being backdoored by the U.S. National Security Agency' + FAIL_PLAINTEXT = 'no encryption/integrity' + FAIL_RC4 = 'using broken RC4 cipher' + FAIL_RIJNDAEL = 'using deprecated & non-standardized Rijndael cipher' + FAIL_RIPEMD = 'using deprecated RIPEMD hash algorithm' + FAIL_SEED = 'using deprecated SEED cipher' + FAIL_SERPENT = 'using deprecated Serpent cipher' + FAIL_SHA1 = 'using broken SHA-1 hash algorithm' + FAIL_SMALL_ECC_MODULUS = 'using small ECC modulus' + FAIL_UNKNOWN = 'using unknown algorithm' + FAIL_UNPROVEN = 'using unproven algorithm' + FAIL_UNTRUSTED = 'using untrusted algorithm developed in secret by a government entity' + + WARN_2048BIT_MODULUS = '2048-bit modulus only provides 112-bits of symmetric strength' + WARN_BLOCK_SIZE = 'using small 64-bit block size' + WARN_CIPHER_MODE = 'using weak cipher mode' + WARN_ENCRYPT_AND_MAC = 'using encrypt-and-MAC mode' + WARN_EXPERIMENTAL = 'using experimental algorithm' + WARN_RNDSIG_KEY = 'using weak random number generator could reveal the key' + WARN_TAG_SIZE = 'using small 64-bit tag size' + WARN_TAG_SIZE_96 = 'using small 96-bit tag size' + + INFO_DEFAULT_OPENSSH_CIPHER = 'default cipher since OpenSSH 6.9' + INFO_DEFAULT_OPENSSH_KEX = 'default key exchange since OpenSSH 6.4' + INFO_DEPRECATED_IN_OPENSSH88 = 'deprecated in OpenSSH 8.8: https://www.openssh.com/txt/release-8.8' + INFO_DISABLED_IN_DBEAR67 = 'disabled in Dropbear SSH 2015.67' + INFO_DISABLED_IN_OPENSSH70 = 'disabled in OpenSSH 7.0: https://www.openssh.com/txt/release-7.0' + INFO_NEVER_IMPLEMENTED_IN_OPENSSH = 'despite the @openssh.com tag, this was never implemented in OpenSSH' + INFO_REMOVED_IN_OPENSSH61 = 'removed since OpenSSH 6.1, removed from specification' + INFO_REMOVED_IN_OPENSSH69 = 'removed in OpenSSH 6.9: https://www.openssh.com/txt/release-6.9' + INFO_REMOVED_IN_OPENSSH70 = 'removed in OpenSSH 7.0: https://www.openssh.com/txt/release-7.0' + INFO_WITHDRAWN_PQ_ALG = 'the sntrup4591761 algorithm was withdrawn, as it may not provide strong post-quantum security' + INFO_EXTENSION_NEGOTIATION = 'pseudo-algorithm that denotes the peer supports RFC8308 extensions' + INFO_STRICT_KEX = 'pseudo-algorithm that denotes the peer supports a stricter key exchange method as a counter-measure to the Terrapin attack (CVE-2023-48795)' + + # Maintains a dictionary per calling thread that yields its own copy of MASTER_DB. This prevents results from one thread polluting the results of another thread. + DB_PER_THREAD: Dict[int, Dict[str, Dict[str, List[List[Optional[str]]]]]] = {} + + MASTER_DB: Dict[str, Dict[str, List[List[Optional[str]]]]] = { + # Format: 'algorithm_name': [['version_first_appeared_in'], [reason_for_failure1, reason_for_failure2, ...], [warning1, warning2, ...], [info1, info2, ...]] + 'kex': { + 'Curve25519SHA256': [[]], + 'curve25519-sha256': [['7.4,d2018.76'], [], [], [INFO_DEFAULT_OPENSSH_KEX]], + 'curve25519-sha256@libssh.org': [['6.4,d2013.62,l10.6.0'], [], [], [INFO_DEFAULT_OPENSSH_KEX]], + 'curve448-sha512': [[]], + 'curve448-sha512@libssh.org': [[]], + 'diffie-hellman-group14-sha1': [['3.9,d0.53,l10.6.0'], [FAIL_SHA1], [WARN_2048BIT_MODULUS]], + 'diffie-hellman-group14-sha224@ssh.com': [[]], + 'diffie-hellman-group14-sha256': [['7.3,d2016.73'], [], [WARN_2048BIT_MODULUS]], + 'diffie-hellman-group14-sha256@ssh.com': [[], [], [WARN_2048BIT_MODULUS]], + '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_group17-sha512': [[]], + 'diffie-hellman-group18-sha512': [['7.3']], + 'diffie-hellman-group18-sha512@ssh.com': [[]], + 'diffie-hellman-group1-sha1': [['2.3.0,d0.28,l10.2', '6.6', '6.9'], [FAIL_1024BIT_MODULUS, FAIL_LOGJAM_ATTACK, FAIL_SHA1], [], [INFO_REMOVED_IN_OPENSSH69]], + 'diffie-hellman-group1-sha256': [[], [FAIL_1024BIT_MODULUS]], + 'diffie-hellman-group-exchange-sha1': [['2.3.0', '6.6', None], [FAIL_SHA1]], + 'diffie-hellman-group-exchange-sha224@ssh.com': [[]], + 'diffie-hellman-group-exchange-sha256': [['4.4']], + 'diffie-hellman-group-exchange-sha256@ssh.com': [[]], + 'diffie-hellman-group-exchange-sha384@ssh.com': [[]], + 'diffie-hellman-group-exchange-sha512@ssh.com': [[]], + 'ecdh-nistp256-kyber-512r3-sha256-d00@openquantumsafe.org': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-nistp384-kyber-768r3-sha384-d00@openquantumsafe.org': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-nistp521-kyber-1024r3-sha512-d00@openquantumsafe.org': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-sha2-1.2.840.10045.3.1.1': [[], [FAIL_SMALL_ECC_MODULUS, FAIL_NSA_BACKDOORED_CURVE]], # NIST P-192 / secp192r1 + 'ecdh-sha2-1.2.840.10045.3.1.7': [[], [FAIL_NSA_BACKDOORED_CURVE]], # NIST P-256 / secp256r1 + 'ecdh-sha2-1.3.132.0.10': [[]], # ECDH over secp256k1 (i.e.: the Bitcoin curve) + 'ecdh-sha2-1.3.132.0.16': [[], [FAIL_UNPROVEN]], # sect283k1 + 'ecdh-sha2-1.3.132.0.1': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], # sect163k1 + 'ecdh-sha2-1.3.132.0.26': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], # sect233k1 + 'ecdh-sha2-1.3.132.0.27': [[], [FAIL_SMALL_ECC_MODULUS, FAIL_NSA_BACKDOORED_CURVE]], # sect233r1 + 'ecdh-sha2-1.3.132.0.33': [[], [FAIL_SMALL_ECC_MODULUS, FAIL_NSA_BACKDOORED_CURVE]], # NIST P-224 / secp224r1 + 'ecdh-sha2-1.3.132.0.34': [[], [FAIL_NSA_BACKDOORED_CURVE]], # NIST P-384 / secp384r1 + 'ecdh-sha2-1.3.132.0.35': [[], [FAIL_NSA_BACKDOORED_CURVE]], # NIST P-521 / secp521r1 + 'ecdh-sha2-1.3.132.0.36': [[], [FAIL_UNPROVEN]], # sect409k1 + 'ecdh-sha2-1.3.132.0.37': [[], [FAIL_NSA_BACKDOORED_CURVE]], # sect409r1 + 'ecdh-sha2-1.3.132.0.38': [[], [FAIL_UNPROVEN]], # sect571k1 + + # 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-sha2-4MHB+NBt3AlaSRQ7MnB4cg==': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], # sect163k1 + 'ecdh-sha2-5pPrSUQtIaTjUSt5VZNBjg==': [[], [FAIL_SMALL_ECC_MODULUS, FAIL_NSA_BACKDOORED_CURVE]], # NIST P-192 / secp192r1 + 'ecdh-sha2-9UzNcgwTlEnSCECZa7V1mw==': [[], [FAIL_NSA_BACKDOORED_CURVE]], # NIST P-256 / secp256r1 + 'ecdh-sha2-brainpoolp256r1@genua.de': [[], [FAIL_UNPROVEN]], + 'ecdh-sha2-brainpoolp384r1@genua.de': [[], [FAIL_UNPROVEN]], + 'ecdh-sha2-brainpoolp521r1@genua.de': [[], [FAIL_UNPROVEN]], + 'ecdh-sha2-curve25519': [[], []], + 'ecdh-sha2-D3FefCjYoJ/kfXgAyLddYA==': [[], [FAIL_NSA_BACKDOORED_CURVE]], # sect409r1 + 'ecdh-sha2-h/SsxnLCtRBh7I9ATyeB3A==': [[], [FAIL_NSA_BACKDOORED_CURVE]], # NIST P-521 / secp521r1 + 'ecdh-sha2-m/FtSAmrV4j/Wy6RVUaK7A==': [[], [FAIL_UNPROVEN]], # sect409k1 + 'ecdh-sha2-mNVwCXAoS1HGmHpLvBC94w==': [[], [FAIL_UNPROVEN]], # sect571k1 + 'ecdh-sha2-nistb233': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], + 'ecdh-sha2-nistb409': [[], [FAIL_UNPROVEN]], + 'ecdh-sha2-nistk163': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], + 'ecdh-sha2-nistk233': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], + 'ecdh-sha2-nistk283': [[], [FAIL_UNPROVEN]], + 'ecdh-sha2-nistk409': [[], [FAIL_UNPROVEN]], + 'ecdh-sha2-nistp192': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-sha2-nistp224': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-sha2-nistp256': [['5.7,d2013.62,l10.6.0'], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-sha2-nistp384': [['5.7,d2013.62'], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-sha2-nistp521': [['5.7,d2013.62'], [FAIL_NSA_BACKDOORED_CURVE]], + 'ecdh-sha2-nistt571': [[], [FAIL_UNPROVEN]], + 'ecdh-sha2-qCbG5Cn/jjsZ7nBeR7EnOA==': [[FAIL_SMALL_ECC_MODULUS, FAIL_NSA_BACKDOORED_CURVE]], # sect233r1 + 'ecdh-sha2-qcFQaMAMGhTziMT0z+Tuzw==': [[], [FAIL_NSA_BACKDOORED_CURVE]], # NIST P-384 / secp384r1 + 'ecdh-sha2-VqBg4QRPjxx1EXZdV0GdWQ==': [[], [FAIL_NSA_BACKDOORED_CURVE, FAIL_SMALL_ECC_MODULUS]], # NIST P-224 / secp224r1 + 'ecdh-sha2-wiRIU8TKjMZ418sMqlqtvQ==': [[], [FAIL_UNPROVEN]], # sect283k1 + 'ecdh-sha2-zD/b3hu/71952ArpUG4OjQ==': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS]], # sect233k1 + 'ecmqv-sha2': [[], [FAIL_UNPROVEN]], + 'ext-info-c': [[], [], [], [INFO_EXTENSION_NEGOTIATION]], # Extension negotiation (RFC 8308) + 'ext-info-s': [[], [], [], [INFO_EXTENSION_NEGOTIATION]], # Extension negotiation (RFC 8308) + 'kex-strict-c-v00@openssh.com': [[], [], [], [INFO_STRICT_KEX]], # Strict KEX marker (countermeasure for CVE-2023-48795). + 'kex-strict-s-v00@openssh.com': [[], [], [], [INFO_STRICT_KEX]], # Strict KEX marker (countermeasure for CVE-2023-48795). + + # The GSS kex algorithms get special wildcard handling, since they include variable base64 data after their standard prefixes. + 'gss-13.3.132.0.10-sha256-*': [[], [FAIL_UNKNOWN]], + 'gss-curve25519-sha256-*': [[]], + 'gss-curve448-sha512-*': [[]], + 'gss-gex-sha1-*': [[], [FAIL_SHA1]], + 'gss-gex-sha256-*': [[]], + 'gss-group14-sha1-*': [[], [FAIL_SHA1], [WARN_2048BIT_MODULUS]], + 'gss-group14-sha256-*': [[], [], [WARN_2048BIT_MODULUS]], + 'gss-group15-sha512-*': [[]], + 'gss-group16-sha512-*': [[]], + 'gss-group17-sha512-*': [[]], + 'gss-group18-sha512-*': [[]], + 'gss-group1-sha1-*': [[], [FAIL_1024BIT_MODULUS, FAIL_LOGJAM_ATTACK, FAIL_SHA1]], + 'gss-nistp256-sha256-*': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'gss-nistp384-sha256-*': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'gss-nistp521-sha512-*': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'kexAlgoCurve25519SHA256': [[]], + 'kexAlgoDH14SHA1': [[], [FAIL_SHA1], [WARN_2048BIT_MODULUS]], + 'kexAlgoDH1SHA1': [[], [FAIL_1024BIT_MODULUS, FAIL_LOGJAM_ATTACK, FAIL_SHA1]], + 'kexAlgoECDH256': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'kexAlgoECDH384': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'kexAlgoECDH521': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'kexguess2@matt.ucc.asn.au': [['d2013.57']], + 'm383-sha384@libassh.org': [[], [FAIL_UNPROVEN]], + 'm511-sha512@libassh.org': [[], [FAIL_UNPROVEN]], + 'rsa1024-sha1': [[], [FAIL_1024BIT_MODULUS, FAIL_SHA1]], + 'rsa2048-sha256': [[], [], [WARN_2048BIT_MODULUS]], + 'sm2kep-sha2-nistp256': [[], [FAIL_NSA_BACKDOORED_CURVE, FAIL_UNTRUSTED]], + 'sntrup4591761x25519-sha512@tinyssh.org': [['8.0', '8.4'], [], [WARN_EXPERIMENTAL], [INFO_WITHDRAWN_PQ_ALG]], + 'sntrup761x25519-sha512@openssh.com': [['8.5'], [], []], + 'x25519-kyber-512r3-sha256-d00@amazon.com': [[]], + 'x25519-kyber512-sha512@aws.amazon.com': [[]], + }, + 'key': { + 'dsa2048-sha224@libassh.org': [[], [FAIL_UNPROVEN], [WARN_2048BIT_MODULUS]], + 'dsa2048-sha256@libassh.org': [[], [FAIL_UNPROVEN], [WARN_2048BIT_MODULUS]], + 'dsa3072-sha256@libassh.org': [[], [FAIL_UNPROVEN]], + 'ecdsa-sha2-1.3.132.0.10-cert-v01@openssh.com': [[], [FAIL_UNKNOWN]], + 'ecdsa-sha2-1.3.132.0.10': [[], [], [WARN_RNDSIG_KEY]], # ECDSA over secp256k1 (i.e.: the Bitcoin curve) + 'ecdsa-sha2-curve25519': [[], [], [WARN_RNDSIG_KEY]], # ECDSA with Curve25519? Bizarre... + 'ecdsa-sha2-nistb233': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistb409': [[], [FAIL_UNPROVEN], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistk163': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistk233': [[], [FAIL_UNPROVEN, FAIL_SMALL_ECC_MODULUS], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistk283': [[], [FAIL_UNPROVEN], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistk409': [[], [FAIL_UNPROVEN], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp224': [[], [FAIL_NSA_BACKDOORED_CURVE, FAIL_SMALL_ECC_MODULUS], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp192': [[], [FAIL_NSA_BACKDOORED_CURVE, FAIL_SMALL_ECC_MODULUS], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp256': [['5.7,d2013.62,l10.6.4'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp256-cert-v01@openssh.com': [['5.7'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp384': [['5.7,d2013.62,l10.6.4'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp384-cert-v01@openssh.com': [['5.7'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp521': [['5.7,d2013.62,l10.6.4'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistp521-cert-v01@openssh.com': [['5.7'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'ecdsa-sha2-nistt571': [[], [FAIL_UNPROVEN], [WARN_RNDSIG_KEY]], + '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]], + 'rsa-sha2-256': [['7.2']], + 'rsa-sha2-256-cert-v01@openssh.com': [['7.8']], + 'rsa-sha2-512': [['7.2']], + 'rsa-sha2-512-cert-v01@openssh.com': [['7.8']], + 'sk-ecdsa-sha2-nistp256-cert-v01@openssh.com': [['8.2'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'sk-ecdsa-sha2-nistp256@openssh.com': [['8.2'], [FAIL_NSA_BACKDOORED_CURVE], [WARN_RNDSIG_KEY]], + 'sk-ssh-ed25519-cert-v01@openssh.com': [['8.2']], + 'sk-ssh-ed25519@openssh.com': [['8.2']], + 'spi-sign-rsa': [[]], + 'spki-sign-dss': [[], [FAIL_1024BIT_MODULUS]], + 'spki-sign-rsa': [[], [FAIL_1024BIT_MODULUS]], + 'ssh-dsa': [[], [FAIL_1024BIT_MODULUS], [WARN_RNDSIG_KEY]], + 'ssh-dss': [['2.1.0,d0.28,l10.2', '6.9'], [FAIL_1024BIT_MODULUS], [WARN_RNDSIG_KEY], [INFO_DISABLED_IN_OPENSSH70]], + 'ssh-dss-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_1024BIT_MODULUS], [WARN_RNDSIG_KEY], [INFO_DISABLED_IN_OPENSSH70]], + 'ssh-dss-cert-v01@openssh.com': [['5.6', '6.9'], [FAIL_1024BIT_MODULUS], [WARN_RNDSIG_KEY]], + 'ssh-dss-sha224@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'ssh-dss-sha256@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'ssh-dss-sha384@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'ssh-dss-sha512@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'ssh-ed25519': [['6.5,l10.7.0']], + 'ssh-ed25519-cert-v01@openssh.com': [['6.5']], + 'ssh-ed448': [[]], + 'ssh-ed448-cert-v01@openssh.com': [[], [], [], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]], + 'ssh-gost2001': [[], [FAIL_UNTRUSTED]], + 'ssh-gost2012-256': [[], [FAIL_UNTRUSTED]], + 'ssh-gost2012-512': [[], [FAIL_UNTRUSTED]], + 'ssh-rsa1': [[], [FAIL_SHA1]], + 'ssh-rsa': [['2.5.0,d0.28,l10.2'], [FAIL_SHA1], [], [INFO_DEPRECATED_IN_OPENSSH88]], + 'ssh-rsa-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_SHA1], [], [INFO_REMOVED_IN_OPENSSH70]], + 'ssh-rsa-cert-v01@openssh.com': [['5.6'], [FAIL_SHA1], [], [INFO_DEPRECATED_IN_OPENSSH88]], + 'ssh-rsa-sha224@ssh.com': [[]], + 'ssh-rsa-sha2-256': [[]], + 'ssh-rsa-sha2-512': [[]], + 'ssh-rsa-sha256@ssh.com': [[]], + 'ssh-rsa-sha384@ssh.com': [[]], + 'ssh-rsa-sha512@ssh.com': [[]], + 'ssh-xmss-cert-v01@openssh.com': [['7.7'], [WARN_EXPERIMENTAL]], + 'ssh-xmss@openssh.com': [['7.7'], [WARN_EXPERIMENTAL]], + 'webauthn-sk-ecdsa-sha2-nistp256@openssh.com': [['8.3'], [FAIL_NSA_BACKDOORED_CURVE]], + 'x509v3-ecdsa-sha2-1.3.132.0.10': [[], [FAIL_UNKNOWN]], + 'x509v3-ecdsa-sha2-nistp256': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'x509v3-ecdsa-sha2-nistp384': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'x509v3-ecdsa-sha2-nistp521': [[], [FAIL_NSA_BACKDOORED_CURVE]], + 'x509v3-rsa2048-sha256': [[]], + 'x509v3-sign-dss': [[], [FAIL_1024BIT_MODULUS], [WARN_RNDSIG_KEY]], + 'x509v3-sign-dss-sha1': [[], [FAIL_1024BIT_MODULUS, FAIL_SHA1]], + 'x509v3-sign-dss-sha224@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'x509v3-sign-dss-sha256@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'x509v3-sign-dss-sha384@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'x509v3-sign-dss-sha512@ssh.com': [[], [FAIL_1024BIT_MODULUS]], + 'x509v3-sign-rsa': [[], [FAIL_SHA1]], + 'x509v3-sign-rsa-sha1': [[], [FAIL_SHA1]], + 'x509v3-sign-rsa-sha224@ssh.com': [[]], + 'x509v3-sign-rsa-sha256': [[]], + 'x509v3-sign-rsa-sha256@ssh.com': [[]], + 'x509v3-sign-rsa-sha384@ssh.com': [[]], + 'x509v3-sign-rsa-sha512@ssh.com': [[]], + 'x509v3-ssh-dss': [[], [FAIL_1024BIT_MODULUS], [WARN_RNDSIG_KEY]], + 'x509v3-ssh-rsa': [[], [FAIL_SHA1], [], [INFO_DEPRECATED_IN_OPENSSH88]], + }, + 'enc': { + '3des-cbc': [['1.2.2,d0.28,l10.2', '6.6', None], [FAIL_3DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + '3des-cfb': [[], [FAIL_3DES], [WARN_CIPHER_MODE]], + '3des-ctr': [['d0.52'], [FAIL_3DES]], + '3des-ecb': [[], [FAIL_3DES], [WARN_CIPHER_MODE]], + '3des': [[], [FAIL_3DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + '3des-ofb': [[], [FAIL_3DES], [WARN_CIPHER_MODE]], + 'AEAD_AES_128_GCM': [[]], + 'AEAD_AES_256_GCM': [[]], + 'aes128-cbc': [['2.3.0,d0.28,l10.2', '6.6', None], [], [WARN_CIPHER_MODE]], + 'aes128-ctr': [['3.7,d0.52,l10.4.1']], + 'aes128-gcm': [[]], + 'aes128-gcm@openssh.com': [['6.2']], + 'aes192-cbc': [['2.3.0,l10.2', '6.6', None], [], [WARN_CIPHER_MODE]], + 'aes192-ctr': [['3.7,l10.4.1']], + 'aes192-gcm@openssh.com': [[], [], [], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]], + 'aes256-cbc': [['2.3.0,d0.47,l10.2', '6.6', None], [], [WARN_CIPHER_MODE]], + 'aes256-ctr': [['3.7,d0.52,l10.4.1']], + 'aes256-gcm': [[]], + 'aes256-gcm@openssh.com': [['6.2']], + 'arcfour128': [['4.2', '6.6', '7.1'], [FAIL_RC4]], + 'arcfour': [['2.1.0', '6.6', '7.1'], [FAIL_RC4]], + 'arcfour256': [['4.2', '6.6', '7.1'], [FAIL_RC4]], + 'blowfish-cbc': [['1.2.2,d0.28,l10.2', '6.6,d0.52', '7.1,d0.52'], [FAIL_BLOWFISH], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'blowfish-cfb': [[], [FAIL_BLOWFISH], [WARN_CIPHER_MODE]], + 'blowfish-ctr': [[], [FAIL_BLOWFISH], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'blowfish-ecb': [[], [FAIL_BLOWFISH], [WARN_CIPHER_MODE]], + 'blowfish': [[], [FAIL_BLOWFISH], [WARN_BLOCK_SIZE]], + 'blowfish-ofb': [[], [FAIL_BLOWFISH], [WARN_CIPHER_MODE]], + 'camellia128-cbc@openssh.org': [[], [], [WARN_CIPHER_MODE]], + 'camellia128-cbc': [[], [], [WARN_CIPHER_MODE]], + 'camellia128-ctr': [[]], + 'camellia128-ctr@openssh.org': [[]], + 'camellia192-cbc@openssh.org': [[], [], [WARN_CIPHER_MODE]], + 'camellia192-cbc': [[], [], [WARN_CIPHER_MODE]], + 'camellia192-ctr': [[]], + 'camellia192-ctr@openssh.org': [[]], + 'camellia256-cbc@openssh.org': [[], [], [WARN_CIPHER_MODE]], + 'camellia256-cbc': [[], [], [WARN_CIPHER_MODE]], + 'camellia256-ctr': [[]], + 'camellia256-ctr@openssh.org': [[]], + 'cast128-12-cbc@ssh.com': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'cast128-cbc': [['2.1.0', '6.6', '7.1'], [FAIL_CAST], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'cast128-12-cbc': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'cast128-12-cfb': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'cast128-12-ecb': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'cast128-12-ofb': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'cast128-cfb': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'cast128-ctr': [[], [FAIL_CAST]], + 'cast128-ecb': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'cast128-ofb': [[], [FAIL_CAST], [WARN_CIPHER_MODE]], + 'chacha20-poly1305': [[], [], [], [INFO_DEFAULT_OPENSSH_CIPHER]], + 'chacha20-poly1305@openssh.com': [['6.5'], [], [], [INFO_DEFAULT_OPENSSH_CIPHER]], + 'crypticore128@ssh.com': [[], [FAIL_UNPROVEN]], + 'des-cbc': [[], [FAIL_DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'des-cfb': [[], [FAIL_DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'des-ecb': [[], [FAIL_DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'des-ofb': [[], [FAIL_DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'des-cbc-ssh1': [[], [FAIL_DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'des-cbc@ssh.com': [[], [FAIL_DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'des': [[], [FAIL_DES], [WARN_CIPHER_MODE, WARN_BLOCK_SIZE]], + 'idea-cbc': [[], [FAIL_IDEA], [WARN_CIPHER_MODE]], + 'idea-cfb': [[], [FAIL_IDEA], [WARN_CIPHER_MODE]], + 'idea-ctr': [[], [FAIL_IDEA]], + 'idea-ecb': [[], [FAIL_IDEA], [WARN_CIPHER_MODE]], + 'idea-ofb': [[], [FAIL_IDEA], [WARN_CIPHER_MODE]], + 'none': [['1.2.2,d2013.56,l10.2'], [FAIL_PLAINTEXT]], + 'rijndael128-cbc': [['2.3.0', '7.0'], [FAIL_RIJNDAEL], [WARN_CIPHER_MODE], [INFO_DISABLED_IN_OPENSSH70]], + 'rijndael192-cbc': [['2.3.0', '7.0'], [FAIL_RIJNDAEL], [WARN_CIPHER_MODE], [INFO_DISABLED_IN_OPENSSH70]], + 'rijndael256-cbc': [['2.3.0', '7.0'], [FAIL_RIJNDAEL], [WARN_CIPHER_MODE], [INFO_DISABLED_IN_OPENSSH70]], + 'rijndael-cbc@lysator.liu.se': [['2.3.0', '6.6', '7.0'], [FAIL_RIJNDAEL], [WARN_CIPHER_MODE], [INFO_DISABLED_IN_OPENSSH70]], + 'rijndael-cbc@ssh.com': [[], [FAIL_RIJNDAEL], [WARN_CIPHER_MODE]], + 'seed-cbc@ssh.com': [[], [FAIL_SEED], [WARN_CIPHER_MODE]], + 'seed-ctr@ssh.com': [[], [FAIL_SEED]], + 'serpent128-cbc': [[], [FAIL_SERPENT], [WARN_CIPHER_MODE]], + 'serpent128-ctr': [[], [FAIL_SERPENT]], + 'serpent128-gcm@libassh.org': [[], [FAIL_SERPENT]], + 'serpent192-cbc': [[], [FAIL_SERPENT], [WARN_CIPHER_MODE]], + 'serpent192-ctr': [[], [FAIL_SERPENT]], + 'serpent256-cbc': [[], [FAIL_SERPENT], [WARN_CIPHER_MODE]], + 'serpent256-ctr': [[], [FAIL_SERPENT]], + 'serpent256-gcm@libassh.org': [[], [FAIL_SERPENT]], + 'twofish128-cbc': [['d0.47', 'd2014.66'], [], [WARN_CIPHER_MODE], [INFO_DISABLED_IN_DBEAR67]], + 'twofish128-ctr': [['d2015.68']], + 'twofish128-gcm@libassh.org': [[]], + 'twofish192-cbc': [[], [], [WARN_CIPHER_MODE]], + 'twofish192-ctr': [[]], + 'twofish256-cbc': [['d0.47', 'd2014.66'], [], [WARN_CIPHER_MODE], [INFO_DISABLED_IN_DBEAR67]], + 'twofish256-ctr': [['d2015.68']], + 'twofish256-gcm@libassh.org': [[]], + 'twofish-cbc': [['d0.28', 'd2014.66'], [], [WARN_CIPHER_MODE], [INFO_DISABLED_IN_DBEAR67]], + 'twofish-cfb': [[], [], [WARN_CIPHER_MODE]], + 'twofish-ctr': [[]], + 'twofish-ecb': [[], [], [WARN_CIPHER_MODE]], + 'twofish-ofb': [[], [], [WARN_CIPHER_MODE]], + }, + 'mac': { + 'AEAD_AES_128_GCM': [[]], + 'AEAD_AES_256_GCM': [[]], + 'aes128-gcm': [[]], + 'aes256-gcm': [[]], + 'cbcmac-3des': [[], [FAIL_UNPROVEN, FAIL_3DES]], + 'cbcmac-aes': [[], [FAIL_UNPROVEN]], + 'cbcmac-blowfish': [[], [FAIL_UNPROVEN, FAIL_BLOWFISH]], + 'cbcmac-des': [[], [FAIL_UNPROVEN, FAIL_DES]], + 'cbcmac-rijndael': [[], [FAIL_UNPROVEN, FAIL_RIJNDAEL]], + 'cbcmac-twofish': [[], [FAIL_UNPROVEN]], + '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]], + 'hmac-md5': [['2.1.0,d0.28', '6.6', '7.1'], [FAIL_MD5], [WARN_ENCRYPT_AND_MAC]], + 'hmac-md5-96': [['2.5.0', '6.6', '7.1'], [FAIL_MD5], [WARN_ENCRYPT_AND_MAC]], + 'hmac-md5-96-etm@openssh.com': [['6.2', '6.6', '7.1'], [FAIL_MD5]], + 'hmac-md5-etm@openssh.com': [['6.2', '6.6', '7.1'], [FAIL_MD5]], + 'hmac-ripemd160': [['2.5.0', '6.6', '7.1'], [FAIL_RIPEMD], [WARN_ENCRYPT_AND_MAC]], + 'hmac-ripemd160-96': [[], [FAIL_RIPEMD], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE]], + 'hmac-ripemd160-etm@openssh.com': [['6.2', '6.6', '7.1'], [FAIL_RIPEMD]], + 'hmac-ripemd160@openssh.com': [['2.1.0', '6.6', '7.1'], [FAIL_RIPEMD], [WARN_ENCRYPT_AND_MAC]], + 'hmac-ripemd': [[], [FAIL_RIPEMD], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha1': [['2.1.0,d0.28,l10.2'], [FAIL_SHA1], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha1-96': [['2.5.0,d0.47', '6.6', '7.1'], [FAIL_SHA1], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha1-96-etm@openssh.com': [['6.2', '6.6', None], [FAIL_SHA1]], + 'hmac-sha1-96@openssh.com': [[], [FAIL_SHA1], [WARN_TAG_SIZE, WARN_ENCRYPT_AND_MAC], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]], + 'hmac-sha1-etm@openssh.com': [['6.2'], [FAIL_SHA1]], + 'hmac-sha2-224': [[], [], [WARN_TAG_SIZE, WARN_ENCRYPT_AND_MAC]], + 'hmac-sha224@ssh.com': [[], [], [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'], [], [WARN_ENCRYPT_AND_MAC], [INFO_REMOVED_IN_OPENSSH61]], + 'hmac-sha2-256-96-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-sha2-384': [[], [], [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'], [], [WARN_ENCRYPT_AND_MAC], [INFO_REMOVED_IN_OPENSSH61]], + 'hmac-sha2-512-96-etm@openssh.com': [[], [], [WARN_TAG_SIZE_96], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]], # Only ever implemented in AsyncSSH (?). + 'hmac-sha2-512-etm@openssh.com': [['6.2']], + 'hmac-sha256-2@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha256-96@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE]], + 'hmac-sha256-96': [[], [], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE]], + 'hmac-sha256@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha256': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha2-56': [[], [], [WARN_TAG_SIZE, 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-sha384@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha512@ssh.com': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'hmac-sha512': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'hmac-whirlpool': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'md5': [[], [FAIL_PLAINTEXT]], + 'md5-8': [[], [FAIL_PLAINTEXT]], + 'none': [['d2013.56'], [FAIL_PLAINTEXT]], + 'ripemd160': [[], [FAIL_PLAINTEXT]], + 'ripemd160-8': [[], [FAIL_PLAINTEXT]], + 'sha1': [[], [FAIL_PLAINTEXT]], + 'sha1-8': [[], [FAIL_PLAINTEXT]], + 'umac-128': [[], [], [WARN_ENCRYPT_AND_MAC]], + 'umac-128-etm@openssh.com': [['6.2']], + 'umac-128@openssh.com': [['6.2'], [], [WARN_ENCRYPT_AND_MAC]], + '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-64@openssh.com': [['4.7'], [], [WARN_ENCRYPT_AND_MAC, WARN_TAG_SIZE]], + 'umac-96@openssh.com': [[], [], [WARN_ENCRYPT_AND_MAC], [INFO_NEVER_IMPLEMENTED_IN_OPENSSH]], + } + } + + + @staticmethod + def get_db() -> Dict[str, Dict[str, List[List[Optional[str]]]]]: + '''Returns a copy of the MASTER_DB that is private to the calling thread. This prevents multiple threads from polluting the results of other threads.''' + calling_thread_id = threading.get_ident() + + if calling_thread_id not in SSH2_KexDB.DB_PER_THREAD: + SSH2_KexDB.DB_PER_THREAD[calling_thread_id] = copy.deepcopy(SSH2_KexDB.MASTER_DB) + + return SSH2_KexDB.DB_PER_THREAD[calling_thread_id] + + + @staticmethod + def thread_exit() -> None: + '''Deletes the calling thread's copy of the MASTER_DB. This is needed because, in rare circumstances, a terminated thread's ID can be re-used by new threads.''' + + calling_thread_id = threading.get_ident() + + if calling_thread_id in SSH2_KexDB.DB_PER_THREAD: + del SSH2_KexDB.DB_PER_THREAD[calling_thread_id] |