/usr/share/perl5/Crypt/Monkeysphere/OpenPGP.pm is in msva-perl 0.9.2-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | package Crypt::Monkeysphere::OpenPGP;
use strict;
use warnings;
use Math::BigInt;
use Digest::SHA;
## WARNING! This entire module has an unstable API at the moment.
## Please do not rely on it, as it may change in the near future.
my $tables = {
# see RFC 4880 section 9.1 (ignoring deprecated algorithms for now)
asym_algos => { rsa => 1,
elgamal => 16,
dsa => 17,
},
# see RFC 4880 section 9.2
ciphers => { plaintext => 0,
idea => 1,
tripledes => 2,
cast5 => 3,
blowfish => 4,
aes128 => 7,
aes192 => 8,
aes256 => 9,
twofish => 10,
},
# see RFC 4880 section 9.3
compression => { uncompressed => 0,
zip => 1,
zlib => 2,
bzip2 => 3,
},
# see RFC 4880 section 9.4
digests => { md5 => 1,
sha1 => 2,
ripemd160 => 3,
sha256 => 8,
sha384 => 9,
sha512 => 10,
sha224 => 11,
},
# see RFC 4880 section 5.2.3.21
usage_flags => { certify => 0x01,
sign => 0x02,
encrypt_comms => 0x04,
encrypt_storage => 0x08,
encrypt => 0x0c, ## both comms and storage
split => 0x10, # the private key is split via secret sharing
authenticate => 0x20,
shared => 0x80, # more than one person holds the entire private key
},
# see RFC 4880 section 4.3
packet_types => { pubkey_enc_session => 1,
sig => 2,
symkey_enc_session => 3,
onepass_sig => 4,
seckey => 5,
pubkey => 6,
sec_subkey => 7,
compressed_data => 8,
symenc_data => 9,
marker => 10,
literal => 11,
trust => 12,
uid => 13,
pub_subkey => 14,
uat => 17,
symenc_w_integrity => 18,
mdc => 19,
},
# see RFC 4880 section 5.2.1
sig_types => { binary_doc => 0x00,
text_doc => 0x01,
standalone => 0x02,
generic_certification => 0x10,
persona_certification => 0x11,
casual_certification => 0x12,
positive_certification => 0x13,
subkey_binding => 0x18,
primary_key_binding => 0x19,
key_signature => 0x1f,
key_revocation => 0x20,
subkey_revocation => 0x28,
certification_revocation => 0x30,
timestamp => 0x40,
thirdparty => 0x50,
},
# see RFC 4880 section 5.2.3.23
revocation_reasons => { no_reason_specified => 0,
key_superseded => 1,
key_compromised => 2,
key_retired => 3,
user_id_no_longer_valid => 32,
},
# see RFC 4880 section 5.2.3.1
subpacket_types => { sig_creation_time => 2,
sig_expiration_time => 3,
exportable => 4,
trust_sig => 5,
regex => 6,
revocable => 7,
key_expiration_time => 9,
preferred_cipher => 11,
revocation_key => 12,
issuer => 16,
notation => 20,
preferred_digest => 21,
preferred_compression => 22,
keyserver_prefs => 23,
preferred_keyserver => 24,
primary_uid => 25,
policy_uri => 26,
usage_flags => 27,
signers_uid => 28,
revocation_reason => 29,
features => 30,
signature_target => 31,
embedded_signature => 32,
},
# bitstring (see RFC 4880 section 5.2.3.24)
features => { mdc => 0x01
},
# bitstring (see RFC 4880 5.2.3.17)
keyserver_prefs => { nomodify => 0x80
},
};
# takes a Math::BigInt, returns it formatted as OpenPGP MPI
# (RFC 4880 section 3.2)
sub mpi_pack {
my $num = shift;
my $hex = $num->as_hex();
$hex =~ s/^0x//;
# ensure we've got an even multiple of 2 nybbles here.
$hex = '0'.$hex
if (length($hex) % 2);
my $val = pack('H*', $hex);
my $mpilen = length($val)*8;
# this is a kludgy way to get the number of significant bits in the
# first byte:
my $bitsinfirstbyte = length(sprintf("%b", ord($val)));
$mpilen -= (8 - $bitsinfirstbyte);
return pack('n', $mpilen).$val;
}
sub make_rsa_pub_key_body {
my $key = shift;
my $key_timestamp = shift;
return
pack('CN', 4, $key_timestamp).
pack('C', $tables->{asym_algos}->{rsa}).
mpi_pack($key->{modulus}).
mpi_pack($key->{exponent});
}
sub fingerprint {
my $key = shift;
my $key_timestamp = shift;
my $rsabody = make_rsa_pub_key_body($key, $key_timestamp);
return Digest::SHA::sha1(pack('Cn', 0x99, length($rsabody)).$rsabody);
}
1;
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