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✏️ Editing: _libssl.py

# coding: utf-8
from __future__ import unicode_literals, division, absolute_import, print_function

from .. import ffi

# Initialize OpenSSL
from ._libcrypto import libcrypto_version_info

if ffi() == 'cffi':
    from ._libssl_cffi import libssl
else:
    from ._libssl_ctypes import libssl

__all__ = [
    'libssl',
    'LibsslConst',
]

if libcrypto_version_info < (1, 1):
    libssl.SSL_library_init()
# Enables SHA2 algorithms on 0.9.8n and older
if libcrypto_version_info < (1, 0):
    libssl.OPENSSL_add_all_algorithms_noconf()

class LibsslConst():
    ERR_LIB_ASN1 = 13
    ERR_LIB_SSL = 20

SSL_CTRL_OPTIONS = 32
    SSL_CTRL_SET_SESS_CACHE_MODE = 44

SSL_VERIFY_NONE = 0
    SSL_VERIFY_PEER = 1

SSL_ST_OK = 3

SSL_ERROR_WANT_READ = 2
    SSL_ERROR_WANT_WRITE = 3
    SSL_ERROR_ZERO_RETURN = 6

SSL_OP_NO_SSLv2 = 0x01000000
    SSL_OP_NO_SSLv3 = 0x02000000
    SSL_OP_NO_TLSv1 = 0x04000000
    SSL_OP_NO_TLSv1_2 = 0x08000000
    SSL_OP_NO_TLSv1_1 = 0x10000000

SSL_SESS_CACHE_CLIENT = 0x0001

SSL_R_NO_SHARED_CIPHER = 193

SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM = 130
    SSL_F_SSL3_GET_KEY_EXCHANGE = 141
    SSL_F_SSL3_GET_SERVER_CERTIFICATE = 144
    SSL_R_BAD_DH_P_LENGTH = 110
    SSL_R_CERTIFICATE_VERIFY_FAILED = 134
    SSL_R_UNKNOWN_PROTOCOL = 252
    SSL_R_DH_KEY_TOO_SMALL = 372

# OpenSSL 1.1.0
    SSL_F_TLS_PROCESS_SKE_DHE = 419
    SSL_F_SSL3_GET_RECORD = 143
    SSL_R_WRONG_VERSION_NUMBER = 267
    SSL_F_TLS_PROCESS_SERVER_CERTIFICATE = 367

# OpenSSL < 1.1.0
    SSL_F_SSL23_GET_SERVER_HELLO = 119
    SSL_F_SSL3_READ_BYTES = 148
    SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE = 1040
    SSL_R_TLSV1_ALERT_PROTOCOL_VERSION = 1070

SSL_CTRL_SET_TLSEXT_HOSTNAME = 55
    TLSEXT_NAMETYPE_host_name = 0

X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY = 20
    X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN = 19
    X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT = 18

X509_V_ERR_CERT_NOT_YET_VALID = 9
    X509_V_ERR_CERT_HAS_EXPIRED = 10

ASN1_F_ASN1_ITEM_VERIFY = 197
    ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM = 161

if libcrypto_version_info >= (1, 1, 0):
    LibsslConst.SSL_R_DH_KEY_TOO_SMALL = 394

Sid Gifari From Gifari Industries - BD Cyber Security Team