1 | <!doctype html> |
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2 | <html> |
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3 | <head> |
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4 | <meta charset="utf-8"> |
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5 | <title>Javascript Signing Demo</title> |
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6 | |
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7 | <script src='https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js'></script> |
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8 | <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css"> |
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9 | <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css"> |
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10 | <style type="text/css"> |
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11 | body,td,th { |
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12 | font-family: Calibri; |
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13 | color: #000; |
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14 | } |
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15 | a:link { |
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16 | color: #0000FF; |
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17 | font-weight: bold; |
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18 | text-decoration: none; |
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19 | } |
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20 | a:visited { |
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21 | text-decoration: none; |
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22 | color: #00F; |
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23 | } |
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24 | a:hover { |
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25 | text-decoration: none; |
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26 | color: #0000FF; |
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27 | } |
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28 | a:active { |
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29 | text-decoration: none; |
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30 | color: #00F; |
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31 | } |
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32 | body { |
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33 | margin-left: 30px; |
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34 | margin-top: 30px; |
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35 | margin-right: 30px; |
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36 | margin-bottom: 30px; |
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37 | } |
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38 | </style> |
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39 | <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> |
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40 | <script src="forge.min.js"></script> |
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41 | </head> |
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42 | <body> |
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43 | |
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44 | <script> |
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45 | |
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46 | |
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47 | // Conversion functions |
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48 | function stringToArrayBuffer(data) |
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49 | { |
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50 | var arrBuff = new ArrayBuffer(data.length); |
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51 | var writer = new Uint8Array(arrBuff); |
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52 | for (var i = 0, len = data.length; i < len; i++) |
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53 | { |
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54 | writer[i] = data.charCodeAt(i); |
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55 | } |
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56 | return arrBuff; |
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57 | } |
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58 | function arrayBufferToString( buffer ) |
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59 | { |
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60 | var binary = ''; |
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61 | var bytes = new Uint8Array( buffer ); |
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62 | var len = bytes.byteLength; |
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63 | for (var i = 0; i < len; i++) |
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64 | { |
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65 | binary += String.fromCharCode( bytes[ i ] ); |
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66 | } |
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67 | return binary; |
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68 | } |
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69 | |
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70 | // From Private Key to a PKCS#8 |
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71 | function privateKeyToPkcs8(privateKey) |
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72 | { |
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73 | var rsaPrivateKey = forge.pki.privateKeyToAsn1(privateKey); |
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74 | var privateKeyInfo = forge.pki.wrapRsaPrivateKey(rsaPrivateKey); |
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75 | var privateKeyInfoDer = forge.asn1.toDer(privateKeyInfo).getBytes(); |
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76 | var privateKeyInfoDerBuff = stringToArrayBuffer(privateKeyInfoDer); |
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77 | return privateKeyInfoDerBuff; |
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78 | } |
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79 | |
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80 | // From Public Key to a PKCS#8 |
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81 | function publicKeyToPkcs8(pk) |
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82 | { |
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83 | var subjectPublicKeyInfo = forge.pki.publicKeyToAsn1(pk); |
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84 | var der = forge.asn1.toDer(subjectPublicKeyInfo).getBytes(); |
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85 | return stringToArrayBuffer(der); |
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86 | } |
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87 | |
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88 | function CreateDownload(text) |
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89 | { |
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90 | var textFile = null; |
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91 | var data = new Blob([text], {type: 'application/x-x509-user-cert'}); |
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92 | textFile = window.URL.createObjectURL(data); |
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93 | return textFile; |
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94 | } |
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95 | |
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96 | function CertInfo(cert) |
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97 | { |
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98 | // Convert to ASN |
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99 | var asn1Cert = forge.pki.certificateToAsn1(cert); |
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100 | |
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101 | // Convert to DER format |
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102 | var p12Der = forge.asn1.toDer(asn1Cert).getBytes(); |
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103 | |
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104 | // Encode with Base64 |
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105 | var p12b64 = forge.util.encode64(p12Der); |
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106 | |
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107 | var j = '<a href="data:application/x-x509-ca-cert;base64,' + p12b64 + '" download="cert.der">Certificate Information</a><br>'; |
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108 | try { j += "NAME: " + cert.subject.getField('CN').value + "<br>" } catch (err) {}; |
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109 | try { j += "MAIL: " + cert.subject.getField('E').value + "<br>" } catch(err) {}; |
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110 | try { j += "ISSUER: " + cert.issuer.getField('CN').value + "<br>" } catch(err) {}; |
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111 | return j; |
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112 | } |
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113 | |
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114 | |
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115 | // Create a CryptoKey from from a PKCS#12 Private Key |
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116 | function importCryptoKeyPkcs8(privateKey,extractable) |
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117 | { |
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118 | var privateKeyInfoDerBuff = privateKeyToPkcs8(privateKey); |
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119 | |
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120 | //Importa la clave en la webcrypto |
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121 | return crypto.subtle.importKey( |
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122 | 'pkcs8', |
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123 | privateKeyInfoDerBuff, |
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124 | { name: "RSASSA-PKCS1-v1_5", hash:{name:"SHA-256"}}, |
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125 | extractable, |
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126 | ["sign"]); |
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127 | } |
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128 | |
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129 | function Verify() |
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130 | { |
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131 | var pem = forge.util.decode64($('#pfxc').val()); |
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132 | var signature64 = $('#pfxs').val(); |
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133 | var signature = forge.util.decode64(signature64); |
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134 | var data = $('#pfxd').val(); |
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135 | var cert = forge.pki.certificateFromPem(pem); |
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136 | |
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137 | window.crypto.subtle.importKey("spki",publicKeyToPkcs8(cert.publicKey), |
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138 | { |
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139 | name: "RSASSA-PKCS1-v1_5", |
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140 | hash: {name: "SHA-256"}, |
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141 | }, |
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142 | false, |
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143 | ["verify"] |
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144 | ).then(function(k) |
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145 | { |
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146 | window.crypto.subtle.verify( |
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147 | { |
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148 | name: "RSASSA-PKCS1-v1_5", |
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149 | }, |
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150 | k, //from generateKey or importKey above |
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151 | stringToArrayBuffer(signature), //ArrayBuffer of the signature |
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152 | stringToArrayBuffer(data) //ArrayBuffer of the data |
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153 | ).then(function(isvalid) |
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154 | { |
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155 | //returns a boolean on whether the signature is true or not |
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156 | if (!isvalid) |
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157 | { |
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158 | var msg = 'Invalid digital Signature!<br>'; |
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159 | msg += 'Signed Document: '; |
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160 | msg += forge.util.decode64($('#pfxd').val()); |
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161 | |
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162 | msg += '<br>'; |
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163 | msg += CertInfo(cert); |
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164 | |
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165 | |
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166 | $('#dr').html(msg); |
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167 | } |
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168 | else |
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169 | { |
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170 | var msg = 'Valid Digital Signature!<br>'; |
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171 | msg += 'Signed Document: '; |
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172 | msg += forge.util.decode64($('#pfxd').val()); |
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173 | |
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174 | msg += '<br>'; |
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175 | msg += CertInfo(cert); |
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176 | |
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177 | |
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178 | $('#dr').html(msg); |
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179 | } |
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180 | }).catch(function(err) |
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181 | { |
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182 | $('#dr').html('Invalid Digital Signature!'); |
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183 | }); |
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184 | } |
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185 | |
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186 | ); |
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187 | } |
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188 | |
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189 | function Sign2() |
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190 | { |
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191 | // Get PFX |
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192 | var fileInput = document.getElementById('pfx'); |
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193 | var file = fileInput.files[0]; |
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194 | |
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195 | // Read it |
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196 | var reader = new FileReader(); |
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197 | reader.onload = function(e) |
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198 | { |
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199 | var contents = e.target.result; |
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200 | var pkcs12Der = arrayBufferToString(contents) |
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201 | var pkcs12B64 = forge.util.encode64(pkcs12Der); |
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202 | var privateKey; |
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203 | var pkcs12Asn1 = forge.asn1.fromDer(pkcs12Der); |
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204 | var password = $('#pfxp').val(); |
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205 | |
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206 | var pkcs12 = forge.pkcs12.pkcs12FromAsn1(pkcs12Asn1, false, password); |
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207 | // load keys |
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208 | for(var sci = 0; sci < pkcs12.safeContents.length; ++sci) |
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209 | { |
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210 | var safeContents = pkcs12.safeContents[sci]; |
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211 | for(var sbi = 0; sbi < safeContents.safeBags.length; ++sbi) |
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212 | { |
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213 | var safeBag = safeContents.safeBags[sbi]; |
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214 | if(safeBag.type === forge.pki.oids.keyBag) |
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215 | { |
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216 | //Found plain private key |
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217 | privateKey = safeBag.key; |
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218 | } |
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219 | else |
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220 | if(safeBag.type === forge.pki.oids.pkcs8ShroudedKeyBag) |
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221 | { |
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222 | // found encrypted private key |
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223 | privateKey = safeBag.key; |
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224 | } |
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225 | else |
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226 | if(safeBag.type === forge.pki.oids.certBag) |
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227 | { |
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228 | // this bag has a certificate... |
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229 | cert = safeBag.cert; |
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230 | } |
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231 | } |
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232 | } |
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233 | |
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234 | importCryptoKeyPkcs8(privateKey,true).then(function(cryptoKey) |
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235 | { |
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236 | // Signed! |
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237 | |
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238 | // Empty stuff |
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239 | var ser = forge.util.encode64($('#form1').serialize()); |
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240 | var digestToSignBuf = stringToArrayBuffer(ser); |
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241 | $('#pfxd').val(ser); |
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242 | var pem = forge.pki.certificateToPem(cert); |
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243 | $('#pfxc').val(forge.util.encode64(pem)); |
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244 | |
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245 | crypto.subtle.sign( |
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246 | {name: "RSASSA-PKCS1-v1_5"}, |
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247 | cryptoKey, |
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248 | digestToSignBuf) |
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249 | .then(function(signature){ |
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250 | sign = arrayBufferToString(signature); |
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251 | signatureB64 = forge.util.encode64(sign); |
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252 | $('#pfxs').val(signatureB64); |
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253 | |
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254 | |
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255 | |
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256 | }); |
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257 | |
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258 | }); |
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259 | |
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260 | } |
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261 | |
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262 | reader.readAsArrayBuffer(file); |
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263 | } |
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264 | |
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265 | function Sign1() |
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266 | { |
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267 | // Check validity |
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268 | var myForm = document.getElementById('form1'); |
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269 | if (myForm.checkValidity()) |
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270 | { |
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271 | Sign2(); |
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272 | } |
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273 | } |
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274 | |
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275 | </script> |
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276 | |
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277 | <strong>Form to fill</strong> |
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278 | <hr> |
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279 | <form name="form1" id="form1" method="post" action=""> |
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280 | <label for="firstname">First name:</label> |
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281 | <input type="text" class="form-control" name="firstname" id="firstname" required><br> |
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282 | <label for="lastname">Last name:</label> |
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283 | <input type="text" class="form-control" name="lastname" id="lastname" required><br> |
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284 | </form> |
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285 | |
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286 | <label for="pfx">Select PFX/P12 file:</label><br> |
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287 | <input name="pfx" class="form-control" type="file" id="pfx" accept=".pfx,.p12" required /><br> |
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288 | <label for="pfxp">Enter Private Key password:</label><br> |
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289 | <input name="pfxp" class="form-control" type="password" id="pfxp" /><br> |
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290 | |
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291 | <button type="button" name="buttonsubmit2" id="buttonsubmit2" onclick="Sign1();" class="btn btn-primary btn-lg">SIGN DOCUMENT</button> |
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292 | |
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293 | <p> </p><br><br> |
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294 | <p><strong>Output</strong></p> |
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295 | <hr> |
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296 | <p> |
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297 | <label for="pfxs">Signature:</label><textarea name="pfxs" id="pfxs" class="form-control" ></textarea><br> |
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298 | <label for="pfxd">Data signed:</label><textarea name="pfxd" id="pfxd" class="form-control" ></textarea><br> |
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299 | <label for="pfxc">Certificate:</label><textarea name="pfxc" id="pfxc" class="form-control" ></textarea><br> |
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300 | <button type="button" name="buttonsubmit3" id="buttonsubmit3" onclick="Verify();" class="btn btn-primary btn-lg">VERIFY SIGNATURE</button> |
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301 | </p> |
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302 | |
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303 | <div id="dr"></div> |
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304 | |
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305 | </body> |
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306 | </html> |
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