Implement RSA generation and signing of messages

This commit is contained in:
GCHQ 77703 2018-08-30 22:38:01 +01:00
parent 0420aa8edb
commit f81ca3ba60
3 changed files with 144 additions and 0 deletions

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@ -89,6 +89,8 @@
"Derive EVP key",
"Bcrypt",
"Scrypt",
"Generate RSA Key Pair",
"RSA Sign",
"Pseudo-Random Number Generator"
]
},

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@ -0,0 +1,82 @@
/**
* @author gchq77703 []
* @copyright Crown Copyright 2018
` * @license Apache-2.0
*/
import Operation from "../Operation";
import forge from "node-forge/dist/forge.min.js";
/**
* Generate RSA Key Pair operation
*/
class GenerateRSAKeyPair extends Operation {
/**
* GenerateRSAKeyPair constructor
*/
constructor() {
super();
this.name = "Generate RSA Key Pair";
this.module = "Ciphers";
this.description = "Generate an RSA key pair with a given number of bits";
this.infoURL = "https://wikipedia.org/wiki/RSA_(cryptosystem)";
this.inputType = "string";
this.outputType = "string";
this.args = [
{
name: "RSA Key Length",
type: "option",
value: [
"1024",
"2048",
"4096"
]
},
{
name: "Output Format",
type: "option",
value: [
"PEM",
"JSON",
"DER"
]
}
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
async run(input, args) {
const [keyLength, outputFormat] = args
return new Promise((resolve, reject) => {
forge.pki.rsa.generateKeyPair({ bits: Number(keyLength), workers: 2 }, (err, keypair) => {
if (err) return reject(err)
let result;
switch(outputFormat) {
case "PEM":
result = forge.pki.publicKeyToPem(keypair.publicKey) + "\n" + forge.pki.privateKeyToPem(keypair.privateKey);
break;
case "JSON":
result = JSON.stringify(keypair);
break;
case "DER":
result = forge.asn1.toDer(forge.pki.privateKeyToAsn1(keypair.privateKey)).getBytes();
break;
};
resolve(result);
})
})
}
}
export default GenerateRSAKeyPair;

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/**
* @author gchq77703 []
* @copyright Crown Copyright 2018
* @license Apache-2.0
*/
import Operation from "../Operation";
import forge from "node-forge/dist/forge.min.js";
/**
* RSA Sign operation
*/
class RSASign extends Operation {
/**
* RSASign constructor
*/
constructor() {
super();
this.name = "RSA Sign";
this.module = "Ciphers";
this.description = "Sign a plaintext message with a PEM encoded RSA key.";
this.infoURL = "https://wikipedia.org/wiki/RSA_(cryptosystem)";
this.inputType = "string";
this.outputType = "byteArray";
this.args = [
{
name: "RSA Private Key (PEM)",
type: "text",
value: "-----BEGIN RSA PRIVATE KEY-----"
},
{
name: "Password",
type: "text",
value: ""
}
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
run(input, args) {
const [key, password] = args;
const privateKey = forge.pki.decryptRsaPrivateKey(key, password);
const md = forge.md.sha1.create();
md.update(input, 'utf8');
const signature = privateKey.sign(md);
return signature.split('').map(char => char.charCodeAt());
}
}
export default RSASign;