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package Authen::HTTP::Signature::Method::RSA; |
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use strict; |
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85
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use warnings; |
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use 5.010; |
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89
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use Moo; |
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2565
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use Crypt::OpenSSL::RSA; |
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20008
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1817
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use MIME::Base64 qw(encode_base64 decode_base64); |
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2097
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168
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use Carp qw(confess); |
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1311
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=head1 NAME |
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Crypt::HTTP::Signature::Method::RSA - Compute digest using asymmetric keys |
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=cut |
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our $VERSION = '0.02'; |
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=head1 PURPOSE |
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This class uses asymmetric RSA keys to compute a HTTP signature digest. It implements the |
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RSA-SHA{1, 256, 512} algorithms. |
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=head1 ATTRIBUTES |
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=over |
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=item key |
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32
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Holds the key data. This should be a string that L can instantiate into |
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a private or public key. |
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35
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If the operation is C, then this attribute must hold a private key. |
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In other words, the string this attribute holds should start with |
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-----BEGIN RSA PRIVATE KEY----- |
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40
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41
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If the operation is C, then this attribute must hold a public key. |
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In other words, the string this attribute holds should start with |
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-----BEGIN PUBLIC KEY----- |
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46
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=back |
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=cut |
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has 'key' => ( |
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is => 'ro', |
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required => 1, |
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53
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); |
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55
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=over |
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57
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=item data |
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59
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Holds the data to be signed or verified. This is typically the C attribute |
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from L. Read-only. Required. |
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62
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=back |
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64
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=cut |
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66
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has 'data' => ( |
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is => 'ro', |
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required => 1, |
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69
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); |
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71
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=over |
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73
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=item hash |
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Digest algorithm. Read-only. Required. |
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77
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=back |
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79
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=cut |
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81
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has 'hash' => ( |
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is => 'ro', |
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required => 1, |
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84
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); |
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85
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86
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=head1 METHODS |
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87
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88
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=over |
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89
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90
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=item sign() |
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91
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92
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Signs C using C. |
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93
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94
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Returns a base 64 encoded signature. |
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95
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96
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=back |
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98
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=cut |
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99
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100
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sub sign { |
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101
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0
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0
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my $self = shift; |
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102
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103
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0
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my $key = Crypt::OpenSSL::RSA->new_private_key($self->key); |
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104
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0
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0
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confess "I don't have a key!" unless $key; |
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105
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106
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0
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$self->_set_digest($key); |
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107
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108
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0
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my $s = $key->sign($self->data); |
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109
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110
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# pass empty string as second arg to prevent line breaks in stream |
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111
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0
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return encode_base64($s, ""); |
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112
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} |
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113
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114
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sub _set_digest { |
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115
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my $self = shift; |
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116
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my $key = shift; |
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117
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118
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for ( $self->hash ) { |
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119
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when ( /sha1/ ) { |
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120
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$key->use_sha1_hash(); |
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121
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} |
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122
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when ( /sha256/ ) { |
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123
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$key->use_sha256_hash(); |
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124
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} |
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125
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when ( /sha512/ ) { |
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126
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$key->use_sha512_hash(); |
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127
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} |
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128
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} |
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129
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} |
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130
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131
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=over |
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132
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133
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=item verify() |
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134
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135
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This method validates a signature was generated by a specific private key by using the corresponding |
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136
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public key. |
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137
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138
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Takes a Base64 encoded signature string as input. |
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139
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140
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Returns a boolean. |
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141
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142
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=back |
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143
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144
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=cut |
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145
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146
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sub verify { |
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147
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my $self = shift; |
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148
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my $signature = shift; |
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149
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150
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confess "I don't have a signature to verify!" unless $signature; |
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151
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152
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my $key = Crypt::OpenSSL::RSA->new_public_key($self->key); |
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153
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confess "I don't have a key!" unless $key; |
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154
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155
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$self->_set_digest($key); |
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156
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157
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return $key->verify($self->data, decode_base64( $signature )); |
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158
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} |
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159
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160
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=head1 SEE ALSO |
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161
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162
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L |
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163
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164
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=cut |
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165
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166
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1; |