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开源软件名称：inevolin/ipfs-file-encryption开源软件地址：https://github.com/inevolin/ipfs-file-encryption开源编程语言：JavaScript 88.3%开源软件介绍：IPFS File Encryption in NodeJSThis repo shows how to encrypt files prior to uploading them to IPFS. Similarly it can decrypt and download these files. The solution uses both RSA and AES encryption algorithms to achieve maximum security. installationDownload and install IPFS CLI: https://docs.ipfs.io/install/command-line/#official-distributions Init IPFS: Start IPFS: Run the following in another prompt: usagewebUIIPFS has a webUI located at http://localhost:5001/webui/ file upload and download functionsUse the provided async function _testing() {
const file = 'package.json' // file to upload
const ipfspath = '/encrypted/data/' + file // ipfspath
// upload to ipfs path
await uploadFileEncrypted(file, ipfspath)
// download from ipfs path
const dl = await downloadFileEncrypted(ipfspath)
// to buffer
const buff = Buffer.from(dl, 'hex')
// save buffer to file
const outfile = ipfspath.replace(/\//g, '_');
console.log('writing:', outfile)
fs.writeFile(outfile, buff, function(err) {
if (err) throw err;
})
}file browserVisit http://localhost:3000/ to see all the uploaded files. Clicking the filename will decrypt and download that file. configYou may want to change these variables in
cryptographyThe encryption strategy uses both RSA and AES to achieve maximum security. Encrypting a file for upload is done as shown on the diagram below, all of this happens in-memory. For very large files you may want to do this on-disk instead (e.g. using pipes).
note: The 16 byte key and 8 byte IV values are converted to hex and result in a 32 byte key and 16 byte IV as required by the AES encryption algo. The output file consists of a header, RSA encrypted key + IV, and the AES encrypted data of the original file. Decrypting the file happens in a similar fashion:
notesWe use both RSA and AES algorithms: RSA can only encrypt a limited amount of data, no longer than its key size, thus we use it to encrypt the AES's secret key. Then the symmetrical AES strategy is used for encrypting potentially large amounts of data, i.e. the file's data itself. You could use AES solely as well for simplicity reasons. However the advantage of having RSA included is that we can generate many RSA decryption keys (= private keys) for end-users whilst having only one encryption key (= public key); instead of sharing just one key with all of the users. Further developments are definitely possible and in some cases encouraged. ContactFor enquiries or issues get in touch with me: Name: Ilya Nevolin Email: [email protected] Q&A
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2023-10-27
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