1 | /**
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2 | * Javascript implementation of ASN.1 validators for PKCS#7 v1.5.
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3 | *
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4 | * @author Dave Longley
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5 | * @author Stefan Siegl
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6 | *
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7 | * Copyright (c) 2012-2015 Digital Bazaar, Inc.
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8 | * Copyright (c) 2012 Stefan Siegl <stesie@brokenpipe.de>
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9 | *
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10 | * The ASN.1 representation of PKCS#7 is as follows
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11 | * (see RFC #2315 for details, http://www.ietf.org/rfc/rfc2315.txt):
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12 | *
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13 | * A PKCS#7 message consists of a ContentInfo on root level, which may
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14 | * contain any number of further ContentInfo nested into it.
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15 | *
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16 | * ContentInfo ::= SEQUENCE {
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17 | * contentType ContentType,
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18 | * content [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL
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19 | * }
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20 | *
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21 | * ContentType ::= OBJECT IDENTIFIER
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22 | *
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23 | * EnvelopedData ::= SEQUENCE {
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24 | * version Version,
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25 | * recipientInfos RecipientInfos,
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26 | * encryptedContentInfo EncryptedContentInfo
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27 | * }
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28 | *
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29 | * EncryptedData ::= SEQUENCE {
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30 | * version Version,
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31 | * encryptedContentInfo EncryptedContentInfo
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32 | * }
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33 | *
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34 | * id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
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35 | * us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
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36 | *
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37 | * SignedData ::= SEQUENCE {
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38 | * version INTEGER,
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39 | * digestAlgorithms DigestAlgorithmIdentifiers,
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40 | * contentInfo ContentInfo,
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41 | * certificates [0] IMPLICIT Certificates OPTIONAL,
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42 | * crls [1] IMPLICIT CertificateRevocationLists OPTIONAL,
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43 | * signerInfos SignerInfos
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44 | * }
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45 | *
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46 | * SignerInfos ::= SET OF SignerInfo
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47 | *
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48 | * SignerInfo ::= SEQUENCE {
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49 | * version Version,
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50 | * issuerAndSerialNumber IssuerAndSerialNumber,
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51 | * digestAlgorithm DigestAlgorithmIdentifier,
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52 | * authenticatedAttributes [0] IMPLICIT Attributes OPTIONAL,
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53 | * digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
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54 | * encryptedDigest EncryptedDigest,
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55 | * unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
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56 | * }
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57 | *
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58 | * EncryptedDigest ::= OCTET STRING
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59 | *
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60 | * Attributes ::= SET OF Attribute
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61 | *
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62 | * Attribute ::= SEQUENCE {
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63 | * attrType OBJECT IDENTIFIER,
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64 | * attrValues SET OF AttributeValue
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65 | * }
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66 | *
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67 | * AttributeValue ::= ANY
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68 | *
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69 | * Version ::= INTEGER
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70 | *
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71 | * RecipientInfos ::= SET OF RecipientInfo
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72 | *
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73 | * EncryptedContentInfo ::= SEQUENCE {
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74 | * contentType ContentType,
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75 | * contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier,
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76 | * encryptedContent [0] IMPLICIT EncryptedContent OPTIONAL
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77 | * }
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78 | *
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79 | * ContentEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
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80 | *
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81 | * The AlgorithmIdentifier contains an Object Identifier (OID) and parameters
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82 | * for the algorithm, if any. In the case of AES and DES3, there is only one,
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83 | * the IV.
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84 | *
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85 | * AlgorithmIdentifer ::= SEQUENCE {
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86 | * algorithm OBJECT IDENTIFIER,
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87 | * parameters ANY DEFINED BY algorithm OPTIONAL
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88 | * }
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89 | *
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90 | * EncryptedContent ::= OCTET STRING
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91 | *
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92 | * RecipientInfo ::= SEQUENCE {
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93 | * version Version,
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94 | * issuerAndSerialNumber IssuerAndSerialNumber,
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95 | * keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
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96 | * encryptedKey EncryptedKey
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97 | * }
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98 | *
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99 | * IssuerAndSerialNumber ::= SEQUENCE {
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100 | * issuer Name,
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101 | * serialNumber CertificateSerialNumber
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102 | * }
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103 | *
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104 | * CertificateSerialNumber ::= INTEGER
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105 | *
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106 | * KeyEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
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107 | *
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108 | * EncryptedKey ::= OCTET STRING
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109 | */
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110 | var forge = require('./forge');
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111 | require('./asn1');
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112 | require('./util');
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113 |
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114 | // shortcut for ASN.1 API
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115 | var asn1 = forge.asn1;
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116 |
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117 | // shortcut for PKCS#7 API
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118 | var p7v = module.exports = forge.pkcs7asn1 = forge.pkcs7asn1 || {};
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119 | forge.pkcs7 = forge.pkcs7 || {};
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120 | forge.pkcs7.asn1 = p7v;
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121 |
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122 | var contentInfoValidator = {
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123 | name: 'ContentInfo',
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124 | tagClass: asn1.Class.UNIVERSAL,
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125 | type: asn1.Type.SEQUENCE,
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126 | constructed: true,
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127 | value: [{
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128 | name: 'ContentInfo.ContentType',
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129 | tagClass: asn1.Class.UNIVERSAL,
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130 | type: asn1.Type.OID,
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131 | constructed: false,
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132 | capture: 'contentType'
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133 | }, {
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134 | name: 'ContentInfo.content',
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135 | tagClass: asn1.Class.CONTEXT_SPECIFIC,
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136 | type: 0,
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137 | constructed: true,
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138 | optional: true,
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139 | captureAsn1: 'content'
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140 | }]
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141 | };
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142 | p7v.contentInfoValidator = contentInfoValidator;
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143 |
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144 | var encryptedContentInfoValidator = {
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145 | name: 'EncryptedContentInfo',
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146 | tagClass: asn1.Class.UNIVERSAL,
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147 | type: asn1.Type.SEQUENCE,
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148 | constructed: true,
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149 | value: [{
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150 | name: 'EncryptedContentInfo.contentType',
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151 | tagClass: asn1.Class.UNIVERSAL,
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152 | type: asn1.Type.OID,
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153 | constructed: false,
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154 | capture: 'contentType'
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155 | }, {
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156 | name: 'EncryptedContentInfo.contentEncryptionAlgorithm',
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157 | tagClass: asn1.Class.UNIVERSAL,
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158 | type: asn1.Type.SEQUENCE,
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159 | constructed: true,
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160 | value: [{
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161 | name: 'EncryptedContentInfo.contentEncryptionAlgorithm.algorithm',
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162 | tagClass: asn1.Class.UNIVERSAL,
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163 | type: asn1.Type.OID,
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164 | constructed: false,
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165 | capture: 'encAlgorithm'
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166 | }, {
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167 | name: 'EncryptedContentInfo.contentEncryptionAlgorithm.parameter',
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168 | tagClass: asn1.Class.UNIVERSAL,
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169 | captureAsn1: 'encParameter'
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170 | }]
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171 | }, {
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172 | name: 'EncryptedContentInfo.encryptedContent',
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173 | tagClass: asn1.Class.CONTEXT_SPECIFIC,
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174 | type: 0,
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175 | /* The PKCS#7 structure output by OpenSSL somewhat differs from what
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176 | * other implementations do generate.
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177 | *
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178 | * OpenSSL generates a structure like this:
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179 | * SEQUENCE {
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180 | * ...
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181 | * [0]
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182 | * 26 DA 67 D2 17 9C 45 3C B1 2A A8 59 2F 29 33 38
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183 | * C3 C3 DF 86 71 74 7A 19 9F 40 D0 29 BE 85 90 45
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184 | * ...
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185 | * }
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186 | *
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187 | * Whereas other implementations (and this PKCS#7 module) generate:
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188 | * SEQUENCE {
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189 | * ...
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190 | * [0] {
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191 | * OCTET STRING
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192 | * 26 DA 67 D2 17 9C 45 3C B1 2A A8 59 2F 29 33 38
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193 | * C3 C3 DF 86 71 74 7A 19 9F 40 D0 29 BE 85 90 45
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194 | * ...
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195 | * }
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196 | * }
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197 | *
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198 | * In order to support both, we just capture the context specific
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199 | * field here. The OCTET STRING bit is removed below.
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200 | */
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201 | capture: 'encryptedContent',
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202 | captureAsn1: 'encryptedContentAsn1'
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203 | }]
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204 | };
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205 |
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206 | p7v.envelopedDataValidator = {
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207 | name: 'EnvelopedData',
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208 | tagClass: asn1.Class.UNIVERSAL,
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209 | type: asn1.Type.SEQUENCE,
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210 | constructed: true,
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211 | value: [{
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212 | name: 'EnvelopedData.Version',
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213 | tagClass: asn1.Class.UNIVERSAL,
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214 | type: asn1.Type.INTEGER,
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215 | constructed: false,
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216 | capture: 'version'
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217 | }, {
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218 | name: 'EnvelopedData.RecipientInfos',
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219 | tagClass: asn1.Class.UNIVERSAL,
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220 | type: asn1.Type.SET,
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221 | constructed: true,
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222 | captureAsn1: 'recipientInfos'
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223 | }].concat(encryptedContentInfoValidator)
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224 | };
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225 |
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226 | p7v.encryptedDataValidator = {
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227 | name: 'EncryptedData',
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228 | tagClass: asn1.Class.UNIVERSAL,
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229 | type: asn1.Type.SEQUENCE,
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230 | constructed: true,
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231 | value: [{
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232 | name: 'EncryptedData.Version',
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233 | tagClass: asn1.Class.UNIVERSAL,
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234 | type: asn1.Type.INTEGER,
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235 | constructed: false,
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236 | capture: 'version'
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237 | }].concat(encryptedContentInfoValidator)
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238 | };
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239 |
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240 | var signerValidator = {
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241 | name: 'SignerInfo',
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242 | tagClass: asn1.Class.UNIVERSAL,
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243 | type: asn1.Type.SEQUENCE,
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244 | constructed: true,
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245 | value: [{
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246 | name: 'SignerInfo.version',
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247 | tagClass: asn1.Class.UNIVERSAL,
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248 | type: asn1.Type.INTEGER,
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249 | constructed: false
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250 | }, {
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251 | name: 'SignerInfo.issuerAndSerialNumber',
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252 | tagClass: asn1.Class.UNIVERSAL,
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253 | type: asn1.Type.SEQUENCE,
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254 | constructed: true,
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255 | value: [{
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256 | name: 'SignerInfo.issuerAndSerialNumber.issuer',
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257 | tagClass: asn1.Class.UNIVERSAL,
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258 | type: asn1.Type.SEQUENCE,
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259 | constructed: true,
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260 | captureAsn1: 'issuer'
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261 | }, {
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262 | name: 'SignerInfo.issuerAndSerialNumber.serialNumber',
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263 | tagClass: asn1.Class.UNIVERSAL,
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264 | type: asn1.Type.INTEGER,
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265 | constructed: false,
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266 | capture: 'serial'
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267 | }]
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268 | }, {
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269 | name: 'SignerInfo.digestAlgorithm',
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270 | tagClass: asn1.Class.UNIVERSAL,
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271 | type: asn1.Type.SEQUENCE,
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272 | constructed: true,
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273 | value: [{
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274 | name: 'SignerInfo.digestAlgorithm.algorithm',
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275 | tagClass: asn1.Class.UNIVERSAL,
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276 | type: asn1.Type.OID,
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277 | constructed: false,
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278 | capture: 'digestAlgorithm'
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279 | }, {
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280 | name: 'SignerInfo.digestAlgorithm.parameter',
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281 | tagClass: asn1.Class.UNIVERSAL,
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282 | constructed: false,
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283 | captureAsn1: 'digestParameter',
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284 | optional: true
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285 | }]
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286 | }, {
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287 | name: 'SignerInfo.authenticatedAttributes',
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288 | tagClass: asn1.Class.CONTEXT_SPECIFIC,
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289 | type: 0,
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290 | constructed: true,
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291 | optional: true,
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292 | capture: 'authenticatedAttributes'
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293 | }, {
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294 | name: 'SignerInfo.digestEncryptionAlgorithm',
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295 | tagClass: asn1.Class.UNIVERSAL,
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296 | type: asn1.Type.SEQUENCE,
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297 | constructed: true,
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298 | capture: 'signatureAlgorithm'
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299 | }, {
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300 | name: 'SignerInfo.encryptedDigest',
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301 | tagClass: asn1.Class.UNIVERSAL,
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302 | type: asn1.Type.OCTETSTRING,
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303 | constructed: false,
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304 | capture: 'signature'
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305 | }, {
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306 | name: 'SignerInfo.unauthenticatedAttributes',
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307 | tagClass: asn1.Class.CONTEXT_SPECIFIC,
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308 | type: 1,
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309 | constructed: true,
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310 | optional: true,
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311 | capture: 'unauthenticatedAttributes'
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312 | }]
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313 | };
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314 |
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315 | p7v.signedDataValidator = {
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316 | name: 'SignedData',
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317 | tagClass: asn1.Class.UNIVERSAL,
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318 | type: asn1.Type.SEQUENCE,
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319 | constructed: true,
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320 | value: [{
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321 | name: 'SignedData.Version',
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322 | tagClass: asn1.Class.UNIVERSAL,
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323 | type: asn1.Type.INTEGER,
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324 | constructed: false,
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325 | capture: 'version'
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326 | }, {
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327 | name: 'SignedData.DigestAlgorithms',
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328 | tagClass: asn1.Class.UNIVERSAL,
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329 | type: asn1.Type.SET,
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330 | constructed: true,
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331 | captureAsn1: 'digestAlgorithms'
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332 | },
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333 | contentInfoValidator,
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334 | {
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335 | name: 'SignedData.Certificates',
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336 | tagClass: asn1.Class.CONTEXT_SPECIFIC,
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337 | type: 0,
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338 | optional: true,
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339 | captureAsn1: 'certificates'
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340 | }, {
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341 | name: 'SignedData.CertificateRevocationLists',
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342 | tagClass: asn1.Class.CONTEXT_SPECIFIC,
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343 | type: 1,
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344 | optional: true,
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345 | captureAsn1: 'crls'
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346 | }, {
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347 | name: 'SignedData.SignerInfos',
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348 | tagClass: asn1.Class.UNIVERSAL,
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349 | type: asn1.Type.SET,
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350 | capture: 'signerInfos',
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351 | optional: true,
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352 | value: [signerValidator]
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353 | }]
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354 | };
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355 |
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356 | p7v.recipientInfoValidator = {
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357 | name: 'RecipientInfo',
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358 | tagClass: asn1.Class.UNIVERSAL,
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359 | type: asn1.Type.SEQUENCE,
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360 | constructed: true,
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361 | value: [{
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362 | name: 'RecipientInfo.version',
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363 | tagClass: asn1.Class.UNIVERSAL,
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364 | type: asn1.Type.INTEGER,
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365 | constructed: false,
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366 | capture: 'version'
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367 | }, {
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368 | name: 'RecipientInfo.issuerAndSerial',
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369 | tagClass: asn1.Class.UNIVERSAL,
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370 | type: asn1.Type.SEQUENCE,
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371 | constructed: true,
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372 | value: [{
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373 | name: 'RecipientInfo.issuerAndSerial.issuer',
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374 | tagClass: asn1.Class.UNIVERSAL,
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375 | type: asn1.Type.SEQUENCE,
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376 | constructed: true,
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377 | captureAsn1: 'issuer'
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378 | }, {
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379 | name: 'RecipientInfo.issuerAndSerial.serialNumber',
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380 | tagClass: asn1.Class.UNIVERSAL,
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381 | type: asn1.Type.INTEGER,
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382 | constructed: false,
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383 | capture: 'serial'
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384 | }]
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385 | }, {
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386 | name: 'RecipientInfo.keyEncryptionAlgorithm',
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387 | tagClass: asn1.Class.UNIVERSAL,
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388 | type: asn1.Type.SEQUENCE,
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389 | constructed: true,
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390 | value: [{
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391 | name: 'RecipientInfo.keyEncryptionAlgorithm.algorithm',
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392 | tagClass: asn1.Class.UNIVERSAL,
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393 | type: asn1.Type.OID,
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394 | constructed: false,
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395 | capture: 'encAlgorithm'
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396 | }, {
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397 | name: 'RecipientInfo.keyEncryptionAlgorithm.parameter',
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398 | tagClass: asn1.Class.UNIVERSAL,
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399 | constructed: false,
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400 | captureAsn1: 'encParameter'
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401 | }]
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402 | }, {
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403 | name: 'RecipientInfo.encryptedKey',
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404 | tagClass: asn1.Class.UNIVERSAL,
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405 | type: asn1.Type.OCTETSTRING,
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406 | constructed: false,
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407 | capture: 'encKey'
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408 | }]
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409 | };
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