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feat: move bits from https://github.com/richardschneider/ipfs-encryption
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| <mxfile userAgent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36" version="7.8.2" editor="www.draw.io"><diagram id="a8b2919f-aefc-d24c-c550-ea0bf34e92af" name="Page-1">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</diagram></mxfile> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| 'use strict' | ||
|
|
||
| const async = require('async') | ||
| const forge = require('node-forge') | ||
| const util = require('./util') | ||
|
|
||
| class CMS { | ||
| constructor (keystore) { | ||
| if (!keystore) { | ||
| throw new Error('keystore is required') | ||
| } | ||
|
|
||
| this.keystore = keystore; | ||
| } | ||
|
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||
| createAnonymousEncryptedData (name, plain, callback) { | ||
| const self = this | ||
| if (!Buffer.isBuffer(plain)) { | ||
| return callback(new Error('Data is required')) | ||
| } | ||
|
|
||
| self.keystore._getPrivateKey(name, (err, key) => { | ||
| if (err) { | ||
| return callback(err) | ||
| } | ||
|
|
||
| try { | ||
| const privateKey = forge.pki.decryptRsaPrivateKey(key, self.keystore._()) | ||
| util.certificateForKey(privateKey, (err, certificate) => { | ||
| if (err) return callback(err) | ||
|
|
||
| // create a p7 enveloped message | ||
| const p7 = forge.pkcs7.createEnvelopedData() | ||
| p7.addRecipient(certificate) | ||
| p7.content = forge.util.createBuffer(plain) | ||
| p7.encrypt() | ||
|
|
||
| // convert message to DER | ||
| const der = forge.asn1.toDer(p7.toAsn1()).getBytes() | ||
| callback(null, Buffer.from(der, 'binary')) | ||
| }) | ||
| } catch (err) { | ||
| callback(err) | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| readData (cmsData, callback) { | ||
| if (!Buffer.isBuffer(cmsData)) { | ||
| return callback(new Error('CMS data is required')) | ||
| } | ||
|
|
||
| const self = this | ||
| let cms | ||
| try { | ||
| const buf = forge.util.createBuffer(cmsData.toString('binary')); | ||
| const obj = forge.asn1.fromDer(buf) | ||
| cms = forge.pkcs7.messageFromAsn1(obj) | ||
| } catch (err) { | ||
| return callback(new Error('Invalid CMS: ' + err.message)) | ||
| } | ||
|
|
||
| // Find a recipient whose key we hold. We only deal with recipient certs | ||
| // issued by ipfs (O=ipfs). | ||
| const recipients = cms.recipients | ||
| .filter(r => r.issuer.find(a => a.shortName === 'O' && a.value === 'ipfs')) | ||
| .filter(r => r.issuer.find(a => a.shortName === 'CN')) | ||
| .map(r => { | ||
| return { | ||
| recipient: r, | ||
| keyId: r.issuer.find(a => a.shortName === 'CN').value | ||
| } | ||
| }) | ||
| async.detect( | ||
| recipients, | ||
| (r, cb) => self.keystore.findKeyById(r.keyId, (err, info) => cb(null, !err && info)), | ||
| (err, r) => { | ||
| if (err) return callback(err) | ||
| if (!r) return callback(new Error('No key found for decryption')) | ||
|
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| async.waterfall([ | ||
| (cb) => self.keystore.findKeyById(r.keyId, cb), | ||
| (key, cb) => self.keystore._getPrivateKey(key.name, cb) | ||
| ], (err, pem) => { | ||
| if (err) return callback(err); | ||
|
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| const privateKey = forge.pki.decryptRsaPrivateKey(pem, self.keystore._()) | ||
| cms.decrypt(r.recipient, privateKey) | ||
| async.setImmediate(() => callback(null, Buffer.from(cms.content.getBytes(), 'binary'))) | ||
| }) | ||
| } | ||
| ) | ||
| } | ||
|
|
||
| } | ||
|
|
||
| module.exports = CMS |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,3 @@ | ||
| 'use strict' | ||
|
|
||
| module.exports = require('./keychain') |
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