Beispiel #1
0
def load_openssl(crypto_path=None):
    global loaded, libcrypto, libsodium, buf, ctx_cleanup

    crypto_path = dict(crypto_path) if crypto_path else dict()
    path = crypto_path.get('openssl', None)
    libcrypto = util.find_library(('crypto', 'eay32'), 'EVP_get_cipherbyname',
                                  'libcrypto', path)

    if libcrypto is None:
        raise Exception('libcrypto(OpenSSL) not found with path %s' % path)

    libcrypto.EVP_get_cipherbyname.restype = c_void_p
    libcrypto.EVP_CIPHER_CTX_new.restype = c_void_p

    libcrypto.EVP_CipherInit_ex.argtypes = (c_void_p, c_void_p, c_char_p,
                                            c_char_p, c_char_p, c_int)
    libcrypto.EVP_CIPHER_CTX_ctrl.argtypes = (c_void_p, c_int, c_int, c_void_p)

    libcrypto.EVP_CipherUpdate.argtypes = (c_void_p, c_void_p, c_void_p,
                                           c_char_p, c_int)

    libcrypto.EVP_CipherFinal_ex.argtypes = (c_void_p, c_void_p, c_void_p)

    try:
        libcrypto.EVP_CIPHER_CTX_cleanup.argtypes = (c_void_p, )
        ctx_cleanup = libcrypto.EVP_CIPHER_CTX_cleanup
    except AttributeError:
        libcrypto.EVP_CIPHER_CTX_reset.argtypes = (c_void_p, )
        ctx_cleanup = libcrypto.EVP_CIPHER_CTX_reset
    libcrypto.EVP_CIPHER_CTX_free.argtypes = (c_void_p, )
    if hasattr(libcrypto, 'OpenSSL_add_all_ciphers'):
        libcrypto.OpenSSL_add_all_ciphers()

    buf = create_string_buffer(buf_size)
    loaded = True
Beispiel #2
0
def load_openssl():
    global loaded, libcrypto, buf

    libcrypto = util.find_library(('crypto', 'eay32'),
                                  'EVP_get_cipherbyname',
                                  'libcrypto')
    if libcrypto is None:
        raise Exception('libcrypto(OpenSSL) not found')

    libcrypto.EVP_get_cipherbyname.restype = c_void_p
    libcrypto.EVP_CIPHER_CTX_new.restype = c_void_p

    libcrypto.EVP_CipherInit_ex.argtypes = (c_void_p, c_void_p, c_char_p,
                                            c_char_p, c_char_p, c_int)

    libcrypto.EVP_CipherUpdate.argtypes = (c_void_p, c_void_p, c_void_p,
                                           c_char_p, c_int)

    libcrypto.EVP_CIPHER_CTX_cleanup.argtypes = (c_void_p,)
    libcrypto.EVP_CIPHER_CTX_free.argtypes = (c_void_p,)
    if hasattr(libcrypto, 'OpenSSL_add_all_ciphers'):
        libcrypto.OpenSSL_add_all_ciphers()

    buf = create_string_buffer(buf_size)
    loaded = True
Beispiel #3
0
def load_libsodium():
    global loaded, libsodium, buf

    libsodium = util.find_library('sodium', 'crypto_stream_salsa20_xor_ic',
                                  'libsodium')
    if libsodium is None:
        raise Exception('libsodium not found')

    libsodium.crypto_stream_salsa20_xor_ic.restype = c_int
    libsodium.crypto_stream_salsa20_xor_ic.argtypes = (c_void_p, c_char_p,
                                                       c_ulonglong, c_char_p,
                                                       c_ulonglong, c_char_p)
    libsodium.crypto_stream_chacha20_xor_ic.restype = c_int
    libsodium.crypto_stream_chacha20_xor_ic.argtypes = (c_void_p, c_char_p,
                                                        c_ulonglong, c_char_p,
                                                        c_ulonglong, c_char_p)

    buf = create_string_buffer(buf_size)
    loaded = True
def load_libsodium():
    global loaded, libsodium, buf

    libsodium = util.find_library('sodium', 'crypto_stream_salsa20_xor_ic',
                                  'libsodium')
    if libsodium is None:
        raise Exception('libsodium not found')

    libsodium.crypto_stream_salsa20_xor_ic.restype = c_int
    libsodium.crypto_stream_salsa20_xor_ic.argtypes = (c_void_p, c_char_p,
                                                       c_ulonglong,
                                                       c_char_p, c_ulonglong,
                                                       c_char_p)
    libsodium.crypto_stream_chacha20_xor_ic.restype = c_int
    libsodium.crypto_stream_chacha20_xor_ic.argtypes = (c_void_p, c_char_p,
                                                        c_ulonglong,
                                                        c_char_p, c_ulonglong,
                                                        c_char_p)

    buf = create_string_buffer(buf_size)
    loaded = True
Beispiel #5
0

class ip6t_entry(ct.Structure):
    """This class is a representation of the C struct ip6t_entry."""
    _fields_ = [
        ("ipv6", ip6t_ip6),
        ("nfcache", ct.c_uint),  # fields that we care about
        ("target_offset", ct.c_uint16),  # size of ip6t_entry + matches
        ("next_offset", ct.c_uint16),  # size of e + matches + target
        ("comefrom", ct.c_uint),  # back pointer
        ("counters", xt_counters),  # packet and byte counters
        ("elems", ct.c_ubyte * 0)
    ]  # the matches then the target


_libiptc, _ = find_library("ip6tc", "iptc")  # old iptables versions use iptc


class ip6tc(object):
    """This class contains all libip6tc API calls."""
    iptc_init = _libiptc.ip6tc_init
    iptc_init.restype = ct.POINTER(ct.c_int)
    iptc_init.argstype = [ct.c_char_p]

    iptc_free = _libiptc.ip6tc_free
    iptc_free.restype = None
    iptc_free.argstype = [ct.c_void_p]

    iptc_commit = _libiptc.ip6tc_commit
    iptc_commit.restype = ct.c_int
    iptc_commit.argstype = [ct.c_void_p]
Beispiel #6
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                ("v2", _xtables_target_v2),
                # Apparently v3 was skipped
                ("v4", _xtables_target_v4),
                ("v5", _xtables_target_v5),
                ("v6", _xtables_target_v6),
                ("v7", _xtables_target_v7),
                # Apparently v8 was skipped
                ("v9", _xtables_target_v9),
                ("v10", _xtables_target_v10)]


class XTablesError(Exception):
    """Raised when an xtables call fails for some reason."""


_libc, _ = find_library("c")
_optind = ct.c_long.in_dll(_libc, "optind")
_optarg = ct.c_char_p.in_dll(_libc, "optarg")

_lib_xtables, _xtables_version = find_library("xtables")
_xtables_libdir = os.getenv("XTABLES_LIBDIR")
if _xtables_libdir is None:
    import os.path
    for xtdir in ["/lib/xtables", "/lib64/xtables", "/usr/lib/xtables",
                  "/usr/lib/iptables", "/usr/lib64/xtables",
                  "/usr/lib64/iptables", "/usr/local/lib/xtables"]:
        if os.path.isdir(xtdir):
            _xtables_libdir = xtdir
            break
if _xtables_libdir is None:
    raise XTablesError("can't find directory with extensions; "
Beispiel #7
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        # default: full netmask
        self.smsk.s6_addr = self.dmsk.s6_addr = 0xff * 16


class ip6t_entry(ct.Structure):
    """This class is a representation of the C struct ip6t_entry."""
    _fields_ = [("ipv6", ip6t_ip6),
                ("nfcache", ct.c_uint),          # fields that we care about
                ("target_offset", ct.c_uint16),  # size of ip6t_entry + matches
                ("next_offset", ct.c_uint16),    # size of e + matches + target
                ("comefrom", ct.c_uint),         # back pointer
                ("counters", xt_counters),       # packet and byte counters
                ("elems", ct.c_ubyte * 0)]       # the matches then the target


_libiptc, _ = find_library("ip6tc", "iptc")  # old iptables versions use iptc


class ip6tc(object):
    """This class contains all libip6tc API calls."""
    iptc_init = _libiptc.ip6tc_init
    iptc_init.restype = ct.c_void_p
    iptc_init.argstype = [ct.c_char_p]

    iptc_free = _libiptc.ip6tc_free
    iptc_free.restype = None
    iptc_free.argstype = [ct.c_void_p]

    iptc_commit = _libiptc.ip6tc_commit
    iptc_commit.restype = ct.c_int
    iptc_commit.argstype = [ct.c_void_p]