This file is indexed.

/usr/lib/python3/dist-packages/pgpdump/utils.py is in python3-pgpdump 1.4-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 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
import binascii


class PgpdumpException(Exception):
    '''Base exception class raised by any parsing errors, etc.'''
    pass


# 256 values corresponding to each possible byte
CRC24_TABLE = (
    0x000000, 0x864cfb, 0x8ad50d, 0x0c99f6, 0x93e6e1, 0x15aa1a, 0x1933ec,
    0x9f7f17, 0xa18139, 0x27cdc2, 0x2b5434, 0xad18cf, 0x3267d8, 0xb42b23,
    0xb8b2d5, 0x3efe2e, 0xc54e89, 0x430272, 0x4f9b84, 0xc9d77f, 0x56a868,
    0xd0e493, 0xdc7d65, 0x5a319e, 0x64cfb0, 0xe2834b, 0xee1abd, 0x685646,
    0xf72951, 0x7165aa, 0x7dfc5c, 0xfbb0a7, 0x0cd1e9, 0x8a9d12, 0x8604e4,
    0x00481f, 0x9f3708, 0x197bf3, 0x15e205, 0x93aefe, 0xad50d0, 0x2b1c2b,
    0x2785dd, 0xa1c926, 0x3eb631, 0xb8faca, 0xb4633c, 0x322fc7, 0xc99f60,
    0x4fd39b, 0x434a6d, 0xc50696, 0x5a7981, 0xdc357a, 0xd0ac8c, 0x56e077,
    0x681e59, 0xee52a2, 0xe2cb54, 0x6487af, 0xfbf8b8, 0x7db443, 0x712db5,
    0xf7614e, 0x19a3d2, 0x9fef29, 0x9376df, 0x153a24, 0x8a4533, 0x0c09c8,
    0x00903e, 0x86dcc5, 0xb822eb, 0x3e6e10, 0x32f7e6, 0xb4bb1d, 0x2bc40a,
    0xad88f1, 0xa11107, 0x275dfc, 0xdced5b, 0x5aa1a0, 0x563856, 0xd074ad,
    0x4f0bba, 0xc94741, 0xc5deb7, 0x43924c, 0x7d6c62, 0xfb2099, 0xf7b96f,
    0x71f594, 0xee8a83, 0x68c678, 0x645f8e, 0xe21375, 0x15723b, 0x933ec0,
    0x9fa736, 0x19ebcd, 0x8694da, 0x00d821, 0x0c41d7, 0x8a0d2c, 0xb4f302,
    0x32bff9, 0x3e260f, 0xb86af4, 0x2715e3, 0xa15918, 0xadc0ee, 0x2b8c15,
    0xd03cb2, 0x567049, 0x5ae9bf, 0xdca544, 0x43da53, 0xc596a8, 0xc90f5e,
    0x4f43a5, 0x71bd8b, 0xf7f170, 0xfb6886, 0x7d247d, 0xe25b6a, 0x641791,
    0x688e67, 0xeec29c, 0x3347a4, 0xb50b5f, 0xb992a9, 0x3fde52, 0xa0a145,
    0x26edbe, 0x2a7448, 0xac38b3, 0x92c69d, 0x148a66, 0x181390, 0x9e5f6b,
    0x01207c, 0x876c87, 0x8bf571, 0x0db98a, 0xf6092d, 0x7045d6, 0x7cdc20,
    0xfa90db, 0x65efcc, 0xe3a337, 0xef3ac1, 0x69763a, 0x578814, 0xd1c4ef,
    0xdd5d19, 0x5b11e2, 0xc46ef5, 0x42220e, 0x4ebbf8, 0xc8f703, 0x3f964d,
    0xb9dab6, 0xb54340, 0x330fbb, 0xac70ac, 0x2a3c57, 0x26a5a1, 0xa0e95a,
    0x9e1774, 0x185b8f, 0x14c279, 0x928e82, 0x0df195, 0x8bbd6e, 0x872498,
    0x016863, 0xfad8c4, 0x7c943f, 0x700dc9, 0xf64132, 0x693e25, 0xef72de,
    0xe3eb28, 0x65a7d3, 0x5b59fd, 0xdd1506, 0xd18cf0, 0x57c00b, 0xc8bf1c,
    0x4ef3e7, 0x426a11, 0xc426ea, 0x2ae476, 0xaca88d, 0xa0317b, 0x267d80,
    0xb90297, 0x3f4e6c, 0x33d79a, 0xb59b61, 0x8b654f, 0x0d29b4, 0x01b042,
    0x87fcb9, 0x1883ae, 0x9ecf55, 0x9256a3, 0x141a58, 0xefaaff, 0x69e604,
    0x657ff2, 0xe33309, 0x7c4c1e, 0xfa00e5, 0xf69913, 0x70d5e8, 0x4e2bc6,
    0xc8673d, 0xc4fecb, 0x42b230, 0xddcd27, 0x5b81dc, 0x57182a, 0xd154d1,
    0x26359f, 0xa07964, 0xace092, 0x2aac69, 0xb5d37e, 0x339f85, 0x3f0673,
    0xb94a88, 0x87b4a6, 0x01f85d, 0x0d61ab, 0x8b2d50, 0x145247, 0x921ebc,
    0x9e874a, 0x18cbb1, 0xe37b16, 0x6537ed, 0x69ae1b, 0xefe2e0, 0x709df7,
    0xf6d10c, 0xfa48fa, 0x7c0401, 0x42fa2f, 0xc4b6d4, 0xc82f22, 0x4e63d9,
    0xd11cce, 0x575035, 0x5bc9c3, 0xdd8538
)


def crc24(data):
    '''Implementation of the CRC-24 algorithm used by OpenPGP.'''
    # CRC-24-Radix-64
    # x24 + x23 + x18 + x17 + x14 + x11 + x10 + x7 + x6
    #   + x5 + x4 + x3 + x + 1 (OpenPGP)
    # 0x864CFB / 0xDF3261 / 0xC3267D
    crc = 0x00b704ce
    # this saves a bunch of slower global accesses
    crc_table = CRC24_TABLE
    for byte in data:
        tbl_idx = ((crc >> 16) ^ byte) & 0xff
        crc = (crc_table[tbl_idx] ^ (crc << 8)) & 0x00ffffff
    return crc


def get_int2(data, offset):
    '''Pull two bytes from data at offset and return as an integer.'''
    return (data[offset] << 8) + data[offset + 1]


def get_int4(data, offset):
    '''Pull four bytes from data at offset and return as an integer.'''
    return ((data[offset] << 24) + (data[offset + 1] << 16) +
            (data[offset + 2] << 8) + data[offset + 3])


def get_int8(data, offset):
    '''Pull eight bytes from data at offset and return as an integer.'''
    return (get_int4(data, offset) << 32) + get_int4(data, offset + 4)


def get_mpi(data, offset):
    '''Gets a multi-precision integer as per RFC-4880.
    Returns the MPI and the new offset.
    See: http://tools.ietf.org/html/rfc4880#section-3.2'''
    mpi_len = get_int2(data, offset)
    offset += 2
    to_process = (mpi_len + 7) // 8
    mpi = 0
    i = -4
    for i in range(0, to_process - 3, 4):
        mpi <<= 32
        mpi += get_int4(data, offset + i)
    for j in range(i + 4, to_process):
        mpi <<= 8
        mpi += data[offset + j]
    # Python 3.2 and later alternative:
    #mpi = int.from_bytes(data[offset:offset + to_process], byteorder='big')
    offset += to_process
    return mpi, offset


def get_key_id(data, offset):
    '''Pull eight bytes from data at offset and return as a 16-byte hex-encoded
    string.'''
    key_id = binascii.hexlify(data[offset:offset + 8])
    return key_id.upper()


def get_int_bytes(data):
    '''Get the big-endian byte form of an integer or MPI.'''
    hexval = '%X' % data
    new_len = (len(hexval) + 1) // 2 * 2
    hexval = hexval.zfill(new_len)
    return binascii.unhexlify(hexval.encode('ascii'))


def same_key(key_a, key_b):
    '''Comparison function for key ID or fingerprint strings, taking into
    account varying length.'''
    if len(key_a) == len(key_b):
        return key_a == key_b
    elif len(key_a) < len(key_b):
        return key_b.endswith(key_a)
    else:
        return key_a.endswith(key_b)