from __future__ import absolute_import, print_function, division import re import codecs import six def always_bytes(unicode_or_bytes, *encode_args): if isinstance(unicode_or_bytes, six.text_type): return unicode_or_bytes.encode(*encode_args) return unicode_or_bytes def native(s, *encoding_opts): """ Convert :py:class:`bytes` or :py:class:`unicode` to the native :py:class:`str` type, using latin1 encoding if conversion is necessary. https://www.python.org/dev/peps/pep-3333/#a-note-on-string-types """ if not isinstance(s, (six.binary_type, six.text_type)): raise TypeError("%r is neither bytes nor unicode" % s) if six.PY2: if isinstance(s, six.text_type): return s.encode(*encoding_opts) else: if isinstance(s, six.binary_type): return s.decode(*encoding_opts) return s # Translate control characters to "safe" characters. This implementation initially # replaced them with the matching control pictures (http://unicode.org/charts/PDF/U2400.pdf), # but that turned out to render badly with monospace fonts. We are back to "." therefore. _control_char_trans = { x: ord(".") # x + 0x2400 for unicode control group pictures for x in range(32) } _control_char_trans[127] = ord(".") # 0x2421 _control_char_trans_newline = _control_char_trans.copy() for x in ("\r", "\n", "\t"): del _control_char_trans_newline[ord(x)] if six.PY2: pass else: _control_char_trans = str.maketrans(_control_char_trans) _control_char_trans_newline = str.maketrans(_control_char_trans_newline) def escape_control_characters(text, keep_spacing=True): """ Replace all unicode C1 control characters from the given text with a single "." Args: keep_spacing: If True, tabs and newlines will not be replaced. """ # type: (six.string_types) -> six.text_type if not isinstance(text, six.string_types): raise ValueError("text type must be unicode but is {}".format(type(text).__name__)) trans = _control_char_trans_newline if keep_spacing else _control_char_trans if six.PY2: return u"".join( six.unichr(trans.get(ord(ch), ord(ch))) for ch in text ) return text.translate(trans) def bytes_to_escaped_str(data, keep_spacing=False, escape_single_quotes=False): """ Take bytes and return a safe string that can be displayed to the user. Single quotes are always escaped, double quotes are never escaped: "'" + bytes_to_escaped_str(...) + "'" gives a valid Python string. Args: keep_spacing: If True, tabs and newlines will not be escaped. """ if not isinstance(data, bytes): raise ValueError("data must be bytes, but is {}".format(data.__class__.__name__)) # We always insert a double-quote here so that we get a single-quoted string back # https://stackoverflow.com/questions/29019340/why-does-python-use-different-quotes-for-representing-strings-depending-on-their ret = repr(b'"' + data).lstrip("b")[2:-1] if not escape_single_quotes: ret = re.sub(r"(? bool if not s or len(s) == 0: return False return sum( i < 9 or 13 < i < 32 or 126 < i for i in six.iterbytes(s[:100]) ) / len(s[:100]) > 0.3 def is_xml(s): # type: (bytes) -> bool return s.strip().startswith(b"<") def clean_hanging_newline(t): """ Many editors will silently add a newline to the final line of a document (I'm looking at you, Vim). This function fixes this common problem at the risk of removing a hanging newline in the rare cases where the user actually intends it. """ if t and t[-1] == "\n": return t[:-1] return t def hexdump(s): """ Returns: A generator of (offset, hex, str) tuples """ for i in range(0, len(s), 16): offset = "{:0=10x}".format(i) part = s[i:i + 16] x = " ".join("{:0=2x}".format(i) for i in six.iterbytes(part)) x = x.ljust(47) # 16*2 + 15 part_repr = native(escape_control_characters( part.decode("ascii", "replace").replace(u"\ufffd", u"."), False )) yield (offset, x, part_repr) >72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 
import os, ssl, time, datetime
from pyasn1.type import univ, constraint, char, namedtype, tag
from pyasn1.codec.der.decoder import decode
from pyasn1.error import PyAsn1Error
import OpenSSL
import tcp

default_exp = 62208000 # =24 * 60 * 60 * 720
default_o = "mitmproxy"
default_cn = "mitmproxy"

def create_ca(o=default_o, cn=default_cn, exp=default_exp):
    key = OpenSSL.crypto.PKey()
    key.generate_key(OpenSSL.crypto.TYPE_RSA, 1024)
    ca = OpenSSL.crypto.X509()
    ca.set_serial_number(int(time.time()*10000))
    ca.set_version(2)
    ca.get_subject().CN = cn
    ca.get_subject().O = o
    ca.gmtime_adj_notBefore(0)
    ca.gmtime_adj_notAfter(exp)
    ca.set_issuer(ca.get_subject())
    ca.set_pubkey(key)
    ca.add_extensions([
      OpenSSL.crypto.X509Extension("basicConstraints", True,
                                   "CA:TRUE"),
      OpenSSL.crypto.X509Extension("nsCertType", True,
                                   "sslCA"),
      OpenSSL.crypto.X509Extension("extendedKeyUsage", True,
                                    "serverAuth,clientAuth,emailProtection,timeStamping,msCodeInd,msCodeCom,msCTLSign,msSGC,msEFS,nsSGC"
                                    ),
      OpenSSL.crypto.X509Extension("keyUsage", False,
                                   "keyCertSign, cRLSign"),
      OpenSSL.crypto.X509Extension("subjectKeyIdentifier", False, "hash",
                                   subject=ca),
      ])
    ca.sign(key, "sha1")
    return key, ca


def dummy_ca(path, o=default_o, cn=default_cn, exp=default_exp):
    dirname = os.path.dirname(path)
    if not os.path.exists(dirname):
        os.makedirs(dirname)
    if path.endswith(".pem"):
        basename, _ = os.path.splitext(path)
        basename = os.path.basename(basename)
    else:
        basename = os.path.basename(path)

    key, ca = create_ca(o=o, cn=cn, exp=exp)

    # Dump the CA plus private key
    f = open(path, "wb")
    f.write(OpenSSL.crypto.dump_privatekey(OpenSSL.crypto.FILETYPE_PEM, key))
    f.write(OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, ca))
    f.close()

    # Dump the certificate in PEM format
    f = open(os.path.join(dirname, basename + "-cert.pem"), "wb")
    f.write(OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, ca))
    f.close()

    # Create a .cer file with the same contents for Android
    f = open(os.path.join(dirname, basename + "-cert.cer"), "wb")
    f.write(OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, ca))
    f.close()

    # Dump the certificate in PKCS12 format for Windows devices
    f = open(os.path.join(dirname, basename + "-cert.p12"), "wb")
    p12 = OpenSSL.crypto.PKCS12()
    p12.set_certificate(ca)
    p12.set_privatekey(key)
    f.write(p12.export())
    f.close()
    return True


def dummy_cert(ca, commonname, sans):
    """
        Generates and writes a certificate to fp.

        ca: Path to the certificate authority file, or None.
        commonname: Common name for the generated certificate.
        sans: A list of Subject Alternate Names.

        Returns cert path if operation succeeded, None if not.
    """
    ss = []
    for i in sans:
        ss.append("DNS: %s"%i)
    ss = ", ".join(ss)

    raw = file(ca, "rb").read()
    ca = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, raw)
    key = OpenSSL.crypto.load_privatekey(OpenSSL.crypto.FILETYPE_PEM, raw)

    cert = OpenSSL.crypto.X509()
    cert.gmtime_adj_notBefore(-3600*48)
    cert.gmtime_adj_notAfter(60 * 60 * 24 * 30)
    cert.set_issuer(ca.get_subject())
    cert.get_subject().CN = commonname
    cert.set_serial_number(int(time.time()*10000))
    if ss:
        cert.set_version(2)
        cert.add_extensions([OpenSSL.crypto.X509Extension("subjectAltName", True, ss)])
    cert.set_pubkey(ca.get_pubkey())
    cert.sign(key, "sha1")
    return SSLCert(cert)


class CertStore:
    """
        Implements an in-memory certificate store.
    """
    def __init__(self):
        self.certs = {}

    def get_cert(self, commonname, sans, cacert):
        """
            Returns an SSLCert object.

            commonname: Common name for the generated certificate. Must be a
            valid, plain-ASCII, IDNA-encoded domain name.

            sans: A list of Subject Alternate Names.

            cacert: The path to a CA certificate.

            Return None if the certificate could not be found or generated.
        """
        if commonname in self.certs:
            return self.certs[commonname]
        c = dummy_cert(cacert, commonname, sans)
        self.certs[commonname] = c
        return c


class _GeneralName(univ.Choice):
    # We are only interested in dNSNames. We use a default handler to ignore
    # other types.
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('dNSName', char.IA5String().subtype(
                implicitTag=tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 2)
            )
        ),
    )


class _GeneralNames(univ.SequenceOf):
    componentType = _GeneralName()
    sizeSpec = univ.SequenceOf.sizeSpec + constraint.ValueSizeConstraint(1, 1024)


class SSLCert:
    def __init__(self, cert):
        """
            Returns a (common name, [subject alternative names]) tuple.
        """
        self.x509 = cert

    @classmethod
    def from_pem(klass, txt):
        x509 = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, txt)
        return klass(x509)

    @classmethod
    def from_der(klass, der):
        pem = ssl.DER_cert_to_PEM_cert(der)
        return klass.from_pem(pem)

    def to_pem(self):
        return OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, self.x509)

    def digest(self, name):
        return self.x509.digest(name)

    @property
    def issuer(self):
        return self.x509.get_issuer().get_components()

    @property
    def notbefore(self):
        t = self.x509.get_notBefore()
        return datetime.datetime.strptime(t, "%Y%m%d%H%M%SZ")

    @property
    def notafter(self):
        t = self.x509.get_notAfter()
        return datetime.datetime.strptime(t, "%Y%m%d%H%M%SZ")

    @property
    def has_expired(self):
        return self.x509.has_expired()

    @property
    def subject(self):
        return self.x509.get_subject().get_components()

    @property
    def serial(self):
        return self.x509.get_serial_number()

    @property
    def keyinfo(self):
        pk = self.x509.get_pubkey()
        types = {
            OpenSSL.crypto.TYPE_RSA: "RSA",
            OpenSSL.crypto.TYPE_DSA: "DSA",
        }
        return (
            types.get(pk.type(), "UNKNOWN"),
            pk.bits()
        )

    @property
    def cn(self):
        c = None
        for i in self.subject:
            if i[0] == "CN":
                c = i[1]
        return c

    @property
    def altnames(self):
        altnames = []
        for i in range(self.x509.get_extension_count()):
            ext = self.x509.get_extension(i)
            if ext.get_short_name() == "subjectAltName":
                try:
                    dec = decode(ext.get_data(), asn1Spec=_GeneralNames())
                except PyAsn1Error:
                    continue
                for i in dec[0]:
                    altnames.append(i[0].asOctets())
        return altnames


def get_remote_cert(host, port, sni):
    c = tcp.TCPClient(host, port)
    c.connect()
    c.convert_to_ssl(sni=sni)
    return c.cert
generated by cgit v1.2.3 (git 2.25.1) at 2025-09-05 23:58:59 +0000