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package Crypt::Perl::RSA::Parse; |
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=encoding utf-8 |
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=head1 NAME |
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Crypt::Perl::RSA::Parse - RSA key parsing |
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=head1 SYNOPSIS |
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use Crypt::Perl::RSA::Parse (); |
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# These accept either DER or PEM, native format or PKCS8/SPKI. |
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my $prkey = Crypt::Perl::RSA::Parse::private($buffer); |
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my $pbkey = Crypt::Perl::RSA::Parse::public($buffer); |
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# Note that this accepts a structure, not raw JSON. |
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my $key = Crypt::Perl::RSA::Parse::jwk($jwk_hr); |
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=head1 DISCUSSION |
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See L and L |
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for descriptions of the interfaces that this module returns. |
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=cut |
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use strict; |
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use warnings; |
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245
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7
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use Try::Tiny; |
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469
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7
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1160
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use Crypt::Format (); |
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1646
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7
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1003
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use Crypt::Perl::ASN1 (); |
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2603
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use Crypt::Perl::RSA::Template (); |
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129
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7
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use Crypt::Perl::X (); |
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7
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7875
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38
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sub _asn1 { |
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333
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333
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2358
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return Crypt::Perl::ASN1->new()->prepare( |
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Crypt::Perl::RSA::Template::get_template('INTEGER'), |
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); |
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} |
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44
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sub private { |
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286
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286
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0
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151265
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my ( $pem_or_der) = @_; |
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47
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286
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1470
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_ensure_der($pem_or_der); |
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49
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286
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539
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my $key_obj; |
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51
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try { |
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286
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286
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24145
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my $parsed = _decode_rsa($pem_or_der); |
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273
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21627281
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$key_obj = _new_private($parsed); |
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} |
55
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catch { |
56
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13
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13
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226
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my $rsa_err = $_; |
57
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58
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try { |
59
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13
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986
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$key_obj = private_pkcs8($pem_or_der); |
60
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} |
61
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catch { |
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11
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303
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die Crypt::Perl::X::create('Generic', "Failed to parse as either RSA ($rsa_err) or PKCS8 ($_)"); |
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13
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145
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}; |
64
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286
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3860
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}; |
65
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66
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275
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7116
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return $key_obj; |
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} |
68
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69
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#Like private(), but only does PKCS8. |
70
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sub private_pkcs8 { |
71
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15
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15
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0
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45
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my ($pem_or_der) = @_; |
72
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73
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15
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58
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_ensure_der($pem_or_der); |
74
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75
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15
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49
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my $pkcs8 = _decode_pkcs8($pem_or_der); |
76
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77
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6
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1778
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my $parsed = _decode_rsa_within_pkcs8_or_die($pkcs8); |
78
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79
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4
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19
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return _new_private($parsed); |
80
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} |
81
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82
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#Checks for RSA format first, then falls back to PKCS8. |
83
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sub public { |
84
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13
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13
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0
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1744
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my ($pem_or_der) = @_; |
85
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86
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13
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48
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_ensure_der($pem_or_der); |
87
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88
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13
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20
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my $key_obj; |
89
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90
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try { |
91
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13
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13
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786
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my $parsed = _decode_rsa_public($pem_or_der); |
92
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2
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44033
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$key_obj = _new_public($parsed); |
93
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} |
94
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catch { |
95
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11
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11
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144
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my $rsa_err = $_; |
96
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97
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try { |
98
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11
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772
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$key_obj = public_SPKI($pem_or_der); |
99
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} |
100
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catch { |
101
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10
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171
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die Crypt::Perl::X::create('Generic', "Failed to parse as either RSA ($rsa_err) or SubjectPublicKeyInfo ($_)"); |
102
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11
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111
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}; |
103
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13
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155
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}; |
104
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105
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3
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73
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return $key_obj; |
106
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} |
107
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108
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#Like public(), but only does SubjectPublicKeyInfo. |
109
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sub public_SPKI { |
110
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11
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11
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0
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28
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my ($pem_or_der) = @_; |
111
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112
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11
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34
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_ensure_der($pem_or_der); |
113
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114
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11
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29
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my $spki = _decode_spki($pem_or_der); |
115
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116
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2
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532
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my $parsed = _decode_rsa_public_within_spki_or_die($spki); |
117
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118
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1
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5
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return _new_public($parsed); |
119
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} |
120
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121
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my %JTK_TO_NEW = qw( |
122
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n modulus |
123
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e publicExponent |
124
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d privateExponent |
125
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p prime1 |
126
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q prime2 |
127
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dp exponent1 |
128
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dq exponent2 |
129
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qi coefficient |
130
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); |
131
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132
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sub jwk { |
133
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4
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4
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0
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5640
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my ($hr) = @_; |
134
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135
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4
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7
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my %constr_args; |
136
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137
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4
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331
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require Crypt::Perl::JWK; |
138
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139
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4
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17
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for my $k (keys %$hr) { |
140
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24
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100
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22844
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next if !$JTK_TO_NEW{$k}; |
141
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20
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46
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$constr_args{ $JTK_TO_NEW{$k} } = Crypt::Perl::JWK::jwk_num_to_bigint($hr->{$k}); |
142
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} |
143
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144
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4
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100
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12333
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if ($hr->{'d'}) { |
145
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2
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6
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$constr_args{'version'} = 0; |
146
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2
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739
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require Crypt::Perl::RSA::PrivateKey; |
147
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2
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15
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return Crypt::Perl::RSA::PrivateKey->new( \%constr_args ); |
148
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} |
149
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150
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2
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903
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require Crypt::Perl::RSA::PublicKey; |
151
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2
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15
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return Crypt::Perl::RSA::PublicKey->new( \%constr_args ); |
152
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} |
153
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154
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#---------------------------------------------------------------------- |
155
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156
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sub _decode_macro { |
157
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333
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333
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1084
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my ( $der_r, $macro ) = ( \$_[0], $_[1] ); |
158
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159
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333
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1075
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my $parser = _asn1()->find($macro); |
160
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161
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333
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7117
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return $parser->decode($$der_r); |
162
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} |
163
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164
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#Checks for RSA format first, then falls back to PKCS8. |
165
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sub _decode_rsa { |
166
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292
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292
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851
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my ($der_r) = (\$_[0]); |
167
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168
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292
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1218
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return _decode_macro( $$der_r, 'RSAPrivateKey' ); |
169
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} |
170
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171
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sub _decode_rsa_public { |
172
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15
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15
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42
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my ($der_r) = (\$_[0]); |
173
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174
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15
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43
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return _decode_macro( $$der_r, 'RSAPublicKey' ); |
175
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} |
176
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177
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sub _decode_rsa_within_pkcs8_or_die { |
178
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6
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6
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15
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my ($pkcs8_hr) = @_; |
179
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180
|
6
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|
11
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my $dec; |
181
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|
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|
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try { |
182
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6
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6
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|
423
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$dec = _decode_rsa( $pkcs8_hr->{'privateKey'} ); |
183
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|
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} |
184
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|
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catch { |
185
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2
|
|
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2
|
|
58
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die Crypt::Perl::X::create('Generic', "Failed to parse RSA within PKCS8: $_"); |
186
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6
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54
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}; |
187
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|
|
|
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|
188
|
4
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|
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|
|
337818
|
return $dec; |
189
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|
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|
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} |
190
|
|
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191
|
|
|
|
|
|
|
sub _decode_rsa_public_within_spki_or_die { |
192
|
2
|
|
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2
|
|
6
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my ($spki_hr) = @_; |
193
|
|
|
|
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194
|
2
|
|
|
|
|
3
|
my $dec; |
195
|
|
|
|
|
|
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try { |
196
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2
|
|
|
2
|
|
144
|
$dec = _decode_rsa_public( $spki_hr->{'subjectPublicKey'}[0] ); |
197
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|
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} |
198
|
|
|
|
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catch { |
199
|
1
|
|
|
1
|
|
15
|
die Crypt::Perl::X::create('Generic', "Failed to parse RSA within SubjectPublicKeyInfo: $_"); |
200
|
2
|
|
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|
63
|
}; |
201
|
|
|
|
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|
202
|
1
|
|
|
|
|
13658
|
return $dec; |
203
|
|
|
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} |
204
|
|
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205
|
|
|
|
|
|
|
sub _decode_pkcs8 { |
206
|
15
|
|
|
15
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|
32
|
my ($der_r) = (\$_[0]); |
207
|
|
|
|
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|
208
|
15
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|
42
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return _decode_macro( $$der_r, 'PrivateKeyInfo' ); |
209
|
|
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} |
210
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|
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211
|
|
|
|
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|
|
sub _decode_spki { |
212
|
11
|
|
|
11
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|
28
|
my ($der_r) = (\$_[0]); |
213
|
|
|
|
|
|
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|
214
|
11
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|
|
|
|
41
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return _decode_macro( $$der_r, 'SubjectPublicKeyInfo' ); |
215
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|
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|
|
|
|
} |
216
|
|
|
|
|
|
|
|
217
|
|
|
|
|
|
|
sub _new_public { |
218
|
3
|
|
|
3
|
|
9
|
my ($parsed_hr) = @_; |
219
|
|
|
|
|
|
|
|
220
|
3
|
|
|
|
|
22
|
require Crypt::Perl::RSA::PublicKey; |
221
|
3
|
|
|
|
|
24
|
return Crypt::Perl::RSA::PublicKey->new($parsed_hr); |
222
|
|
|
|
|
|
|
} |
223
|
|
|
|
|
|
|
|
224
|
|
|
|
|
|
|
sub _new_private { |
225
|
277
|
|
|
277
|
|
844
|
my ($parsed_hr) = @_; |
226
|
|
|
|
|
|
|
|
227
|
277
|
|
|
|
|
3810
|
require Crypt::Perl::RSA::PrivateKey; |
228
|
277
|
|
|
|
|
2276
|
return Crypt::Perl::RSA::PrivateKey->new($parsed_hr); |
229
|
|
|
|
|
|
|
} |
230
|
|
|
|
|
|
|
|
231
|
|
|
|
|
|
|
#Modifies in-place. |
232
|
|
|
|
|
|
|
sub _pem_to_der { |
233
|
299
|
|
|
299
|
|
1577
|
$_[0] = Crypt::Format::pem2der(@_); |
234
|
|
|
|
|
|
|
|
235
|
299
|
|
|
|
|
21548
|
return; |
236
|
|
|
|
|
|
|
} |
237
|
|
|
|
|
|
|
|
238
|
|
|
|
|
|
|
sub _ensure_der { |
239
|
325
|
|
|
325
|
|
899
|
my ($pem_or_der_r) = \$_[0]; |
240
|
|
|
|
|
|
|
|
241
|
325
|
100
|
|
|
|
2104
|
if ( $$pem_or_der_r =~ m<\A-> ) { |
242
|
299
|
|
|
|
|
1197
|
_pem_to_der($$pem_or_der_r); |
243
|
|
|
|
|
|
|
} |
244
|
|
|
|
|
|
|
|
245
|
325
|
|
|
|
|
608
|
return; |
246
|
|
|
|
|
|
|
} |
247
|
|
|
|
|
|
|
|
248
|
|
|
|
|
|
|
1; |