/**
|
* Javascript implementation of PKCS#12.
|
*
|
* @author Dave Longley
|
* @author Stefan Siegl <stesie@brokenpipe.de>
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*
|
* Copyright (c) 2010-2014 Digital Bazaar, Inc.
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* Copyright (c) 2012 Stefan Siegl <stesie@brokenpipe.de>
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*
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* The ASN.1 representation of PKCS#12 is as follows
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* (see ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12-tc1.pdf for details)
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*
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* PFX ::= SEQUENCE {
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* version INTEGER {v3(3)}(v3,...),
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* authSafe ContentInfo,
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* macData MacData OPTIONAL
|
* }
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*
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* MacData ::= SEQUENCE {
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* mac DigestInfo,
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* macSalt OCTET STRING,
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* iterations INTEGER DEFAULT 1
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* }
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* Note: The iterations default is for historical reasons and its use is
|
* deprecated. A higher value, like 1024, is recommended.
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*
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* DigestInfo is defined in PKCS#7 as follows:
|
*
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* DigestInfo ::= SEQUENCE {
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* digestAlgorithm DigestAlgorithmIdentifier,
|
* digest Digest
|
* }
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*
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* DigestAlgorithmIdentifier ::= AlgorithmIdentifier
|
*
|
* The AlgorithmIdentifier contains an Object Identifier (OID) and parameters
|
* for the algorithm, if any. In the case of SHA1 there is none.
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*
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* AlgorithmIdentifer ::= SEQUENCE {
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* algorithm OBJECT IDENTIFIER,
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* parameters ANY DEFINED BY algorithm OPTIONAL
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* }
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*
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* Digest ::= OCTET STRING
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*
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*
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* ContentInfo ::= SEQUENCE {
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* contentType ContentType,
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* content [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL
|
* }
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*
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* ContentType ::= OBJECT IDENTIFIER
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*
|
* AuthenticatedSafe ::= SEQUENCE OF ContentInfo
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* -- Data if unencrypted
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* -- EncryptedData if password-encrypted
|
* -- EnvelopedData if public key-encrypted
|
*
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*
|
* SafeContents ::= SEQUENCE OF SafeBag
|
*
|
* SafeBag ::= SEQUENCE {
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* bagId BAG-TYPE.&id ({PKCS12BagSet})
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* bagValue [0] EXPLICIT BAG-TYPE.&Type({PKCS12BagSet}{@bagId}),
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* bagAttributes SET OF PKCS12Attribute OPTIONAL
|
* }
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*
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* PKCS12Attribute ::= SEQUENCE {
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* attrId ATTRIBUTE.&id ({PKCS12AttrSet}),
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* attrValues SET OF ATTRIBUTE.&Type ({PKCS12AttrSet}{@attrId})
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* } -- This type is compatible with the X.500 type 'Attribute'
|
*
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* PKCS12AttrSet ATTRIBUTE ::= {
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* friendlyName | -- from PKCS #9
|
* localKeyId, -- from PKCS #9
|
* ... -- Other attributes are allowed
|
* }
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*
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* CertBag ::= SEQUENCE {
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* certId BAG-TYPE.&id ({CertTypes}),
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* certValue [0] EXPLICIT BAG-TYPE.&Type ({CertTypes}{@certId})
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* }
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*
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* x509Certificate BAG-TYPE ::= {OCTET STRING IDENTIFIED BY {certTypes 1}}
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* -- DER-encoded X.509 certificate stored in OCTET STRING
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*
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* sdsiCertificate BAG-TYPE ::= {IA5String IDENTIFIED BY {certTypes 2}}
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* -- Base64-encoded SDSI certificate stored in IA5String
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*
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* CertTypes BAG-TYPE ::= {
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* x509Certificate |
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* sdsiCertificate,
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* ... -- For future extensions
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* }
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*/
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var forge = require('./forge');
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require('./asn1');
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require('./hmac');
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require('./oids');
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require('./pkcs7asn1');
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require('./pbe');
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require('./random');
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require('./rsa');
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require('./sha1');
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require('./util');
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require('./x509');
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// shortcut for asn.1 & PKI API
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var asn1 = forge.asn1;
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var pki = forge.pki;
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// shortcut for PKCS#12 API
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var p12 = module.exports = forge.pkcs12 = forge.pkcs12 || {};
|
|
var contentInfoValidator = {
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name: 'ContentInfo',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE, // a ContentInfo
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constructed: true,
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value: [{
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name: 'ContentInfo.contentType',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.OID,
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constructed: false,
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capture: 'contentType'
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}, {
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name: 'ContentInfo.content',
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tagClass: asn1.Class.CONTEXT_SPECIFIC,
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constructed: true,
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captureAsn1: 'content'
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}]
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};
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var pfxValidator = {
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name: 'PFX',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE,
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constructed: true,
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value: [{
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name: 'PFX.version',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.INTEGER,
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constructed: false,
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capture: 'version'
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},
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contentInfoValidator, {
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name: 'PFX.macData',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE,
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constructed: true,
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optional: true,
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captureAsn1: 'mac',
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value: [{
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name: 'PFX.macData.mac',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE, // DigestInfo
|
constructed: true,
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value: [{
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name: 'PFX.macData.mac.digestAlgorithm',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE, // DigestAlgorithmIdentifier
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constructed: true,
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value: [{
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name: 'PFX.macData.mac.digestAlgorithm.algorithm',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.OID,
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constructed: false,
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capture: 'macAlgorithm'
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}, {
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name: 'PFX.macData.mac.digestAlgorithm.parameters',
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tagClass: asn1.Class.UNIVERSAL,
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captureAsn1: 'macAlgorithmParameters'
|
}]
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}, {
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name: 'PFX.macData.mac.digest',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.OCTETSTRING,
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constructed: false,
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capture: 'macDigest'
|
}]
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}, {
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name: 'PFX.macData.macSalt',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.OCTETSTRING,
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constructed: false,
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capture: 'macSalt'
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}, {
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name: 'PFX.macData.iterations',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.INTEGER,
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constructed: false,
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optional: true,
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capture: 'macIterations'
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}]
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}]
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};
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var safeBagValidator = {
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name: 'SafeBag',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE,
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constructed: true,
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value: [{
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name: 'SafeBag.bagId',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.OID,
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constructed: false,
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capture: 'bagId'
|
}, {
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name: 'SafeBag.bagValue',
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tagClass: asn1.Class.CONTEXT_SPECIFIC,
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constructed: true,
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captureAsn1: 'bagValue'
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}, {
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name: 'SafeBag.bagAttributes',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SET,
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constructed: true,
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optional: true,
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capture: 'bagAttributes'
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}]
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};
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var attributeValidator = {
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name: 'Attribute',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE,
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constructed: true,
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value: [{
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name: 'Attribute.attrId',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.OID,
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constructed: false,
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capture: 'oid'
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}, {
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name: 'Attribute.attrValues',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SET,
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constructed: true,
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capture: 'values'
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}]
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};
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var certBagValidator = {
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name: 'CertBag',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.SEQUENCE,
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constructed: true,
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value: [{
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name: 'CertBag.certId',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Type.OID,
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constructed: false,
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capture: 'certId'
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}, {
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name: 'CertBag.certValue',
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tagClass: asn1.Class.CONTEXT_SPECIFIC,
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constructed: true,
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/* So far we only support X.509 certificates (which are wrapped in
|
an OCTET STRING, hence hard code that here). */
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value: [{
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name: 'CertBag.certValue[0]',
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tagClass: asn1.Class.UNIVERSAL,
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type: asn1.Class.OCTETSTRING,
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constructed: false,
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capture: 'cert'
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}]
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}]
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};
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/**
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* Search SafeContents structure for bags with matching attributes.
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*
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* The search can optionally be narrowed by a certain bag type.
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*
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* @param safeContents the SafeContents structure to search in.
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* @param attrName the name of the attribute to compare against.
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* @param attrValue the attribute value to search for.
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* @param [bagType] bag type to narrow search by.
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*
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* @return an array of matching bags.
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*/
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function _getBagsByAttribute(safeContents, attrName, attrValue, bagType) {
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var result = [];
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for(var i = 0; i < safeContents.length; i++) {
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for(var j = 0; j < safeContents[i].safeBags.length; j++) {
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var bag = safeContents[i].safeBags[j];
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if(bagType !== undefined && bag.type !== bagType) {
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continue;
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}
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// only filter by bag type, no attribute specified
|
if(attrName === null) {
|
result.push(bag);
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continue;
|
}
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if(bag.attributes[attrName] !== undefined &&
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bag.attributes[attrName].indexOf(attrValue) >= 0) {
|
result.push(bag);
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}
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}
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}
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return result;
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}
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/**
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* Converts a PKCS#12 PFX in ASN.1 notation into a PFX object.
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*
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* @param obj The PKCS#12 PFX in ASN.1 notation.
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* @param strict true to use strict DER decoding, false not to (default: true).
|
* @param {String} password Password to decrypt with (optional).
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*
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* @return PKCS#12 PFX object.
|
*/
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p12.pkcs12FromAsn1 = function(obj, strict, password) {
|
// handle args
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if(typeof strict === 'string') {
|
password = strict;
|
strict = true;
|
} else if(strict === undefined) {
|
strict = true;
|
}
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|
// validate PFX and capture data
|
var capture = {};
|
var errors = [];
|
if(!asn1.validate(obj, pfxValidator, capture, errors)) {
|
var error = new Error('Cannot read PKCS#12 PFX. ' +
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'ASN.1 object is not an PKCS#12 PFX.');
|
error.errors = error;
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throw error;
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}
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|
var pfx = {
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version: capture.version.charCodeAt(0),
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safeContents: [],
|
|
/**
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* Gets bags with matching attributes.
|
*
|
* @param filter the attributes to filter by:
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* [localKeyId] the localKeyId to search for.
|
* [localKeyIdHex] the localKeyId in hex to search for.
|
* [friendlyName] the friendly name to search for.
|
* [bagType] bag type to narrow each attribute search by.
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*
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* @return a map of attribute type to an array of matching bags or, if no
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* attribute was given but a bag type, the map key will be the
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* bag type.
|
*/
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getBags: function(filter) {
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var rval = {};
|
|
var localKeyId;
|
if('localKeyId' in filter) {
|
localKeyId = filter.localKeyId;
|
} else if('localKeyIdHex' in filter) {
|
localKeyId = forge.util.hexToBytes(filter.localKeyIdHex);
|
}
|
|
// filter on bagType only
|
if(localKeyId === undefined && !('friendlyName' in filter) &&
|
'bagType' in filter) {
|
rval[filter.bagType] = _getBagsByAttribute(
|
pfx.safeContents, null, null, filter.bagType);
|
}
|
|
if(localKeyId !== undefined) {
|
rval.localKeyId = _getBagsByAttribute(
|
pfx.safeContents, 'localKeyId',
|
localKeyId, filter.bagType);
|
}
|
if('friendlyName' in filter) {
|
rval.friendlyName = _getBagsByAttribute(
|
pfx.safeContents, 'friendlyName',
|
filter.friendlyName, filter.bagType);
|
}
|
|
return rval;
|
},
|
|
/**
|
* DEPRECATED: use getBags() instead.
|
*
|
* Get bags with matching friendlyName attribute.
|
*
|
* @param friendlyName the friendly name to search for.
|
* @param [bagType] bag type to narrow search by.
|
*
|
* @return an array of bags with matching friendlyName attribute.
|
*/
|
getBagsByFriendlyName: function(friendlyName, bagType) {
|
return _getBagsByAttribute(
|
pfx.safeContents, 'friendlyName', friendlyName, bagType);
|
},
|
|
/**
|
* DEPRECATED: use getBags() instead.
|
*
|
* Get bags with matching localKeyId attribute.
|
*
|
* @param localKeyId the localKeyId to search for.
|
* @param [bagType] bag type to narrow search by.
|
*
|
* @return an array of bags with matching localKeyId attribute.
|
*/
|
getBagsByLocalKeyId: function(localKeyId, bagType) {
|
return _getBagsByAttribute(
|
pfx.safeContents, 'localKeyId', localKeyId, bagType);
|
}
|
};
|
|
if(capture.version.charCodeAt(0) !== 3) {
|
var error = new Error('PKCS#12 PFX of version other than 3 not supported.');
|
error.version = capture.version.charCodeAt(0);
|
throw error;
|
}
|
|
if(asn1.derToOid(capture.contentType) !== pki.oids.data) {
|
var error = new Error('Only PKCS#12 PFX in password integrity mode supported.');
|
error.oid = asn1.derToOid(capture.contentType);
|
throw error;
|
}
|
|
var data = capture.content.value[0];
|
if(data.tagClass !== asn1.Class.UNIVERSAL ||
|
data.type !== asn1.Type.OCTETSTRING) {
|
throw new Error('PKCS#12 authSafe content data is not an OCTET STRING.');
|
}
|
data = _decodePkcs7Data(data);
|
|
// check for MAC
|
if(capture.mac) {
|
var md = null;
|
var macKeyBytes = 0;
|
var macAlgorithm = asn1.derToOid(capture.macAlgorithm);
|
switch(macAlgorithm) {
|
case pki.oids.sha1:
|
md = forge.md.sha1.create();
|
macKeyBytes = 20;
|
break;
|
case pki.oids.sha256:
|
md = forge.md.sha256.create();
|
macKeyBytes = 32;
|
break;
|
case pki.oids.sha384:
|
md = forge.md.sha384.create();
|
macKeyBytes = 48;
|
break;
|
case pki.oids.sha512:
|
md = forge.md.sha512.create();
|
macKeyBytes = 64;
|
break;
|
case pki.oids.md5:
|
md = forge.md.md5.create();
|
macKeyBytes = 16;
|
break;
|
}
|
if(md === null) {
|
throw new Error('PKCS#12 uses unsupported MAC algorithm: ' + macAlgorithm);
|
}
|
|
// verify MAC (iterations default to 1)
|
var macSalt = new forge.util.ByteBuffer(capture.macSalt);
|
var macIterations = (('macIterations' in capture) ?
|
parseInt(forge.util.bytesToHex(capture.macIterations), 16) : 1);
|
var macKey = p12.generateKey(
|
password, macSalt, 3, macIterations, macKeyBytes, md);
|
var mac = forge.hmac.create();
|
mac.start(md, macKey);
|
mac.update(data.value);
|
var macValue = mac.getMac();
|
if(macValue.getBytes() !== capture.macDigest) {
|
throw new Error('PKCS#12 MAC could not be verified. Invalid password?');
|
}
|
}
|
|
_decodeAuthenticatedSafe(pfx, data.value, strict, password);
|
return pfx;
|
};
|
|
/**
|
* Decodes PKCS#7 Data. PKCS#7 (RFC 2315) defines "Data" as an OCTET STRING,
|
* but it is sometimes an OCTET STRING that is composed/constructed of chunks,
|
* each its own OCTET STRING. This is BER-encoding vs. DER-encoding. This
|
* function transforms this corner-case into the usual simple,
|
* non-composed/constructed OCTET STRING.
|
*
|
* This function may be moved to ASN.1 at some point to better deal with
|
* more BER-encoding issues, should they arise.
|
*
|
* @param data the ASN.1 Data object to transform.
|
*/
|
function _decodePkcs7Data(data) {
|
// handle special case of "chunked" data content: an octet string composed
|
// of other octet strings
|
if(data.composed || data.constructed) {
|
var value = forge.util.createBuffer();
|
for(var i = 0; i < data.value.length; ++i) {
|
value.putBytes(data.value[i].value);
|
}
|
data.composed = data.constructed = false;
|
data.value = value.getBytes();
|
}
|
return data;
|
}
|
|
/**
|
* Decode PKCS#12 AuthenticatedSafe (BER encoded) into PFX object.
|
*
|
* The AuthenticatedSafe is a BER-encoded SEQUENCE OF ContentInfo.
|
*
|
* @param pfx The PKCS#12 PFX object to fill.
|
* @param {String} authSafe BER-encoded AuthenticatedSafe.
|
* @param strict true to use strict DER decoding, false not to.
|
* @param {String} password Password to decrypt with (optional).
|
*/
|
function _decodeAuthenticatedSafe(pfx, authSafe, strict, password) {
|
authSafe = asn1.fromDer(authSafe, strict); /* actually it's BER encoded */
|
|
if(authSafe.tagClass !== asn1.Class.UNIVERSAL ||
|
authSafe.type !== asn1.Type.SEQUENCE ||
|
authSafe.constructed !== true) {
|
throw new Error('PKCS#12 AuthenticatedSafe expected to be a ' +
|
'SEQUENCE OF ContentInfo');
|
}
|
|
for(var i = 0; i < authSafe.value.length; i++) {
|
var contentInfo = authSafe.value[i];
|
|
// validate contentInfo and capture data
|
var capture = {};
|
var errors = [];
|
if(!asn1.validate(contentInfo, contentInfoValidator, capture, errors)) {
|
var error = new Error('Cannot read ContentInfo.');
|
error.errors = errors;
|
throw error;
|
}
|
|
var obj = {
|
encrypted: false
|
};
|
var safeContents = null;
|
var data = capture.content.value[0];
|
switch(asn1.derToOid(capture.contentType)) {
|
case pki.oids.data:
|
if(data.tagClass !== asn1.Class.UNIVERSAL ||
|
data.type !== asn1.Type.OCTETSTRING) {
|
throw new Error('PKCS#12 SafeContents Data is not an OCTET STRING.');
|
}
|
safeContents = _decodePkcs7Data(data).value;
|
break;
|
case pki.oids.encryptedData:
|
safeContents = _decryptSafeContents(data, password);
|
obj.encrypted = true;
|
break;
|
default:
|
var error = new Error('Unsupported PKCS#12 contentType.');
|
error.contentType = asn1.derToOid(capture.contentType);
|
throw error;
|
}
|
|
obj.safeBags = _decodeSafeContents(safeContents, strict, password);
|
pfx.safeContents.push(obj);
|
}
|
}
|
|
/**
|
* Decrypt PKCS#7 EncryptedData structure.
|
*
|
* @param data ASN.1 encoded EncryptedContentInfo object.
|
* @param password The user-provided password.
|
*
|
* @return The decrypted SafeContents (ASN.1 object).
|
*/
|
function _decryptSafeContents(data, password) {
|
var capture = {};
|
var errors = [];
|
if(!asn1.validate(
|
data, forge.pkcs7.asn1.encryptedDataValidator, capture, errors)) {
|
var error = new Error('Cannot read EncryptedContentInfo.');
|
error.errors = errors;
|
throw error;
|
}
|
|
var oid = asn1.derToOid(capture.contentType);
|
if(oid !== pki.oids.data) {
|
var error = new Error(
|
'PKCS#12 EncryptedContentInfo ContentType is not Data.');
|
error.oid = oid;
|
throw error;
|
}
|
|
// get cipher
|
oid = asn1.derToOid(capture.encAlgorithm);
|
var cipher = pki.pbe.getCipher(oid, capture.encParameter, password);
|
|
// get encrypted data
|
var encryptedContentAsn1 = _decodePkcs7Data(capture.encryptedContentAsn1);
|
var encrypted = forge.util.createBuffer(encryptedContentAsn1.value);
|
|
cipher.update(encrypted);
|
if(!cipher.finish()) {
|
throw new Error('Failed to decrypt PKCS#12 SafeContents.');
|
}
|
|
return cipher.output.getBytes();
|
}
|
|
/**
|
* Decode PKCS#12 SafeContents (BER-encoded) into array of Bag objects.
|
*
|
* The safeContents is a BER-encoded SEQUENCE OF SafeBag.
|
*
|
* @param {String} safeContents BER-encoded safeContents.
|
* @param strict true to use strict DER decoding, false not to.
|
* @param {String} password Password to decrypt with (optional).
|
*
|
* @return {Array} Array of Bag objects.
|
*/
|
function _decodeSafeContents(safeContents, strict, password) {
|
// if strict and no safe contents, return empty safes
|
if(!strict && safeContents.length === 0) {
|
return [];
|
}
|
|
// actually it's BER-encoded
|
safeContents = asn1.fromDer(safeContents, strict);
|
|
if(safeContents.tagClass !== asn1.Class.UNIVERSAL ||
|
safeContents.type !== asn1.Type.SEQUENCE ||
|
safeContents.constructed !== true) {
|
throw new Error(
|
'PKCS#12 SafeContents expected to be a SEQUENCE OF SafeBag.');
|
}
|
|
var res = [];
|
for(var i = 0; i < safeContents.value.length; i++) {
|
var safeBag = safeContents.value[i];
|
|
// validate SafeBag and capture data
|
var capture = {};
|
var errors = [];
|
if(!asn1.validate(safeBag, safeBagValidator, capture, errors)) {
|
var error = new Error('Cannot read SafeBag.');
|
error.errors = errors;
|
throw error;
|
}
|
|
/* Create bag object and push to result array. */
|
var bag = {
|
type: asn1.derToOid(capture.bagId),
|
attributes: _decodeBagAttributes(capture.bagAttributes)
|
};
|
res.push(bag);
|
|
var validator, decoder;
|
var bagAsn1 = capture.bagValue.value[0];
|
switch(bag.type) {
|
case pki.oids.pkcs8ShroudedKeyBag:
|
/* bagAsn1 has a EncryptedPrivateKeyInfo, which we need to decrypt.
|
Afterwards we can handle it like a keyBag,
|
which is a PrivateKeyInfo. */
|
bagAsn1 = pki.decryptPrivateKeyInfo(bagAsn1, password);
|
if(bagAsn1 === null) {
|
throw new Error(
|
'Unable to decrypt PKCS#8 ShroudedKeyBag, wrong password?');
|
}
|
|
/* fall through */
|
case pki.oids.keyBag:
|
/* A PKCS#12 keyBag is a simple PrivateKeyInfo as understood by our
|
PKI module, hence we don't have to do validation/capturing here,
|
just pass what we already got. */
|
try {
|
bag.key = pki.privateKeyFromAsn1(bagAsn1);
|
} catch(e) {
|
// ignore unknown key type, pass asn1 value
|
bag.key = null;
|
bag.asn1 = bagAsn1;
|
}
|
continue; /* Nothing more to do. */
|
|
case pki.oids.certBag:
|
/* A PKCS#12 certBag can wrap both X.509 and sdsi certificates.
|
Therefore put the SafeBag content through another validator to
|
capture the fields. Afterwards check & store the results. */
|
validator = certBagValidator;
|
decoder = function() {
|
if(asn1.derToOid(capture.certId) !== pki.oids.x509Certificate) {
|
var error = new Error(
|
'Unsupported certificate type, only X.509 supported.');
|
error.oid = asn1.derToOid(capture.certId);
|
throw error;
|
}
|
|
// true=produce cert hash
|
var certAsn1 = asn1.fromDer(capture.cert, strict);
|
try {
|
bag.cert = pki.certificateFromAsn1(certAsn1, true);
|
} catch(e) {
|
// ignore unknown cert type, pass asn1 value
|
bag.cert = null;
|
bag.asn1 = certAsn1;
|
}
|
};
|
break;
|
|
default:
|
var error = new Error('Unsupported PKCS#12 SafeBag type.');
|
error.oid = bag.type;
|
throw error;
|
}
|
|
/* Validate SafeBag value (i.e. CertBag, etc.) and capture data if needed. */
|
if(validator !== undefined &&
|
!asn1.validate(bagAsn1, validator, capture, errors)) {
|
var error = new Error('Cannot read PKCS#12 ' + validator.name);
|
error.errors = errors;
|
throw error;
|
}
|
|
/* Call decoder function from above to store the results. */
|
decoder();
|
}
|
|
return res;
|
}
|
|
/**
|
* Decode PKCS#12 SET OF PKCS12Attribute into JavaScript object.
|
*
|
* @param attributes SET OF PKCS12Attribute (ASN.1 object).
|
*
|
* @return the decoded attributes.
|
*/
|
function _decodeBagAttributes(attributes) {
|
var decodedAttrs = {};
|
|
if(attributes !== undefined) {
|
for(var i = 0; i < attributes.length; ++i) {
|
var capture = {};
|
var errors = [];
|
if(!asn1.validate(attributes[i], attributeValidator, capture, errors)) {
|
var error = new Error('Cannot read PKCS#12 BagAttribute.');
|
error.errors = errors;
|
throw error;
|
}
|
|
var oid = asn1.derToOid(capture.oid);
|
if(pki.oids[oid] === undefined) {
|
// unsupported attribute type, ignore.
|
continue;
|
}
|
|
decodedAttrs[pki.oids[oid]] = [];
|
for(var j = 0; j < capture.values.length; ++j) {
|
decodedAttrs[pki.oids[oid]].push(capture.values[j].value);
|
}
|
}
|
}
|
|
return decodedAttrs;
|
}
|
|
/**
|
* Wraps a private key and certificate in a PKCS#12 PFX wrapper. If a
|
* password is provided then the private key will be encrypted.
|
*
|
* An entire certificate chain may also be included. To do this, pass
|
* an array for the "cert" parameter where the first certificate is
|
* the one that is paired with the private key and each subsequent one
|
* verifies the previous one. The certificates may be in PEM format or
|
* have been already parsed by Forge.
|
*
|
* @todo implement password-based-encryption for the whole package
|
*
|
* @param key the private key.
|
* @param cert the certificate (may be an array of certificates in order
|
* to specify a certificate chain).
|
* @param password the password to use, null for none.
|
* @param options:
|
* algorithm the encryption algorithm to use
|
* ('aes128', 'aes192', 'aes256', '3des'), defaults to 'aes128'.
|
* count the iteration count to use.
|
* saltSize the salt size to use.
|
* useMac true to include a MAC, false not to, defaults to true.
|
* localKeyId the local key ID to use, in hex.
|
* friendlyName the friendly name to use.
|
* generateLocalKeyId true to generate a random local key ID,
|
* false not to, defaults to true.
|
*
|
* @return the PKCS#12 PFX ASN.1 object.
|
*/
|
p12.toPkcs12Asn1 = function(key, cert, password, options) {
|
// set default options
|
options = options || {};
|
options.saltSize = options.saltSize || 8;
|
options.count = options.count || 2048;
|
options.algorithm = options.algorithm || options.encAlgorithm || 'aes128';
|
if(!('useMac' in options)) {
|
options.useMac = true;
|
}
|
if(!('localKeyId' in options)) {
|
options.localKeyId = null;
|
}
|
if(!('generateLocalKeyId' in options)) {
|
options.generateLocalKeyId = true;
|
}
|
|
var localKeyId = options.localKeyId;
|
var bagAttrs;
|
if(localKeyId !== null) {
|
localKeyId = forge.util.hexToBytes(localKeyId);
|
} else if(options.generateLocalKeyId) {
|
// use SHA-1 of paired cert, if available
|
if(cert) {
|
var pairedCert = forge.util.isArray(cert) ? cert[0] : cert;
|
if(typeof pairedCert === 'string') {
|
pairedCert = pki.certificateFromPem(pairedCert);
|
}
|
var sha1 = forge.md.sha1.create();
|
sha1.update(asn1.toDer(pki.certificateToAsn1(pairedCert)).getBytes());
|
localKeyId = sha1.digest().getBytes();
|
} else {
|
// FIXME: consider using SHA-1 of public key (which can be generated
|
// from private key components), see: cert.generateSubjectKeyIdentifier
|
// generate random bytes
|
localKeyId = forge.random.getBytes(20);
|
}
|
}
|
|
var attrs = [];
|
if(localKeyId !== null) {
|
attrs.push(
|
// localKeyID
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// attrId
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
asn1.oidToDer(pki.oids.localKeyId).getBytes()),
|
// attrValues
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SET, true, [
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OCTETSTRING, false,
|
localKeyId)
|
])
|
]));
|
}
|
if('friendlyName' in options) {
|
attrs.push(
|
// friendlyName
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// attrId
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
asn1.oidToDer(pki.oids.friendlyName).getBytes()),
|
// attrValues
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SET, true, [
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.BMPSTRING, false,
|
options.friendlyName)
|
])
|
]));
|
}
|
|
if(attrs.length > 0) {
|
bagAttrs = asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SET, true, attrs);
|
}
|
|
// collect contents for AuthenticatedSafe
|
var contents = [];
|
|
// create safe bag(s) for certificate chain
|
var chain = [];
|
if(cert !== null) {
|
if(forge.util.isArray(cert)) {
|
chain = cert;
|
} else {
|
chain = [cert];
|
}
|
}
|
|
var certSafeBags = [];
|
for(var i = 0; i < chain.length; ++i) {
|
// convert cert from PEM as necessary
|
cert = chain[i];
|
if(typeof cert === 'string') {
|
cert = pki.certificateFromPem(cert);
|
}
|
|
// SafeBag
|
var certBagAttrs = (i === 0) ? bagAttrs : undefined;
|
var certAsn1 = pki.certificateToAsn1(cert);
|
var certSafeBag =
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// bagId
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
asn1.oidToDer(pki.oids.certBag).getBytes()),
|
// bagValue
|
asn1.create(asn1.Class.CONTEXT_SPECIFIC, 0, true, [
|
// CertBag
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// certId
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
asn1.oidToDer(pki.oids.x509Certificate).getBytes()),
|
// certValue (x509Certificate)
|
asn1.create(asn1.Class.CONTEXT_SPECIFIC, 0, true, [
|
asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.OCTETSTRING, false,
|
asn1.toDer(certAsn1).getBytes())
|
])])]),
|
// bagAttributes (OPTIONAL)
|
certBagAttrs
|
]);
|
certSafeBags.push(certSafeBag);
|
}
|
|
if(certSafeBags.length > 0) {
|
// SafeContents
|
var certSafeContents = asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, certSafeBags);
|
|
// ContentInfo
|
var certCI =
|
// PKCS#7 ContentInfo
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// contentType
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
// OID for the content type is 'data'
|
asn1.oidToDer(pki.oids.data).getBytes()),
|
// content
|
asn1.create(asn1.Class.CONTEXT_SPECIFIC, 0, true, [
|
asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.OCTETSTRING, false,
|
asn1.toDer(certSafeContents).getBytes())
|
])
|
]);
|
contents.push(certCI);
|
}
|
|
// create safe contents for private key
|
var keyBag = null;
|
if(key !== null) {
|
// SafeBag
|
var pkAsn1 = pki.wrapRsaPrivateKey(pki.privateKeyToAsn1(key));
|
if(password === null) {
|
// no encryption
|
keyBag = asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// bagId
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
asn1.oidToDer(pki.oids.keyBag).getBytes()),
|
// bagValue
|
asn1.create(asn1.Class.CONTEXT_SPECIFIC, 0, true, [
|
// PrivateKeyInfo
|
pkAsn1
|
]),
|
// bagAttributes (OPTIONAL)
|
bagAttrs
|
]);
|
} else {
|
// encrypted PrivateKeyInfo
|
keyBag = asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// bagId
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
asn1.oidToDer(pki.oids.pkcs8ShroudedKeyBag).getBytes()),
|
// bagValue
|
asn1.create(asn1.Class.CONTEXT_SPECIFIC, 0, true, [
|
// EncryptedPrivateKeyInfo
|
pki.encryptPrivateKeyInfo(pkAsn1, password, options)
|
]),
|
// bagAttributes (OPTIONAL)
|
bagAttrs
|
]);
|
}
|
|
// SafeContents
|
var keySafeContents =
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [keyBag]);
|
|
// ContentInfo
|
var keyCI =
|
// PKCS#7 ContentInfo
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// contentType
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
// OID for the content type is 'data'
|
asn1.oidToDer(pki.oids.data).getBytes()),
|
// content
|
asn1.create(asn1.Class.CONTEXT_SPECIFIC, 0, true, [
|
asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.OCTETSTRING, false,
|
asn1.toDer(keySafeContents).getBytes())
|
])
|
]);
|
contents.push(keyCI);
|
}
|
|
// create AuthenticatedSafe by stringing together the contents
|
var safe = asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, contents);
|
|
var macData;
|
if(options.useMac) {
|
// MacData
|
var sha1 = forge.md.sha1.create();
|
var macSalt = new forge.util.ByteBuffer(
|
forge.random.getBytes(options.saltSize));
|
var count = options.count;
|
// 160-bit key
|
var key = p12.generateKey(password, macSalt, 3, count, 20);
|
var mac = forge.hmac.create();
|
mac.start(sha1, key);
|
mac.update(asn1.toDer(safe).getBytes());
|
var macValue = mac.getMac();
|
macData = asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// mac DigestInfo
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// digestAlgorithm
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// algorithm = SHA-1
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
asn1.oidToDer(pki.oids.sha1).getBytes()),
|
// parameters = Null
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.NULL, false, '')
|
]),
|
// digest
|
asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.OCTETSTRING,
|
false, macValue.getBytes())
|
]),
|
// macSalt OCTET STRING
|
asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.OCTETSTRING, false, macSalt.getBytes()),
|
// iterations INTEGER (XXX: Only support count < 65536)
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.INTEGER, false,
|
asn1.integerToDer(count).getBytes()
|
)
|
]);
|
}
|
|
// PFX
|
return asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// version (3)
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.INTEGER, false,
|
asn1.integerToDer(3).getBytes()),
|
// PKCS#7 ContentInfo
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.SEQUENCE, true, [
|
// contentType
|
asn1.create(asn1.Class.UNIVERSAL, asn1.Type.OID, false,
|
// OID for the content type is 'data'
|
asn1.oidToDer(pki.oids.data).getBytes()),
|
// content
|
asn1.create(asn1.Class.CONTEXT_SPECIFIC, 0, true, [
|
asn1.create(
|
asn1.Class.UNIVERSAL, asn1.Type.OCTETSTRING, false,
|
asn1.toDer(safe).getBytes())
|
])
|
]),
|
macData
|
]);
|
};
|
|
/**
|
* Derives a PKCS#12 key.
|
*
|
* @param password the password to derive the key material from, null or
|
* undefined for none.
|
* @param salt the salt, as a ByteBuffer, to use.
|
* @param id the PKCS#12 ID byte (1 = key material, 2 = IV, 3 = MAC).
|
* @param iter the iteration count.
|
* @param n the number of bytes to derive from the password.
|
* @param md the message digest to use, defaults to SHA-1.
|
*
|
* @return a ByteBuffer with the bytes derived from the password.
|
*/
|
p12.generateKey = forge.pbe.generatePkcs12Key;
|
