# rsa-pem-from-mod-exp

> Create RSA Public Key PEM from Modulus and Exponent value in node.js

Latest version **0.8.6** (published 2023-06-16) · MIT license · 0 weekly downloads

## Install

```sh
npm install rsa-pem-from-mod-exp
pnpm add rsa-pem-from-mod-exp
yarn add rsa-pem-from-mod-exp
bun add rsa-pem-from-mod-exp
```

## Health

**Score 25/100 (F)** — status: abandoned.

Positive: has types; no vulnerabilities; high quality score.

Warnings: low downloads; no esm support; pre 1.0.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 0.8.6 |
| Published | 2023-06-16 |
| First published | 2014-02-13 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | CommonJS |
| Dependencies | 0 |
| Unpacked size | 12.4 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 41 |
| Author | Michael J. Ryan |
| Maintainers | tracker1 |
| Keywords | rsa, public-key, pem, modulus, exponent |

## Links

- npm: https://www.npmjs.com/package/rsa-pem-from-mod-exp
- Repository: https://github.com/tracker1/node-rsa-pem-from-mod-exp
- Homepage: https://github.com/tracker1/node-rsa-pem-from-mod-exp#readme
- Issues: https://github.com/tracker1/node-rsa-pem-from-mod-exp/issues
- npm.io page: https://npm.io/package/rsa-pem-from-mod-exp

## Recent versions

- 0.8.6 (latest) — 2023-06-16
- 0.8.5 — 2022-09-14
- 0.8.4 — 2014-02-13
- 0.8.0 — 2014-02-13
- 0.2.0 — 2014-02-13

## README

node-rsa-pem-from-mod-exp
=========================

Create RSA Public Key PEM from Modulus and Exponent value in [node.js](http://nodejs.org/). There are no dependencies to other modules for use.

This allows you to use the modulus/exponent values for validating signed value.

The original code is based on the answer to [this stackoverflow question](http://stackoverflow.com/questions/18835132/xml-to-pem-in-node-js).


## Install ##
```
npm install rsa-pem-from-mod-exp
```

## Usage ##
``` javascript
//getPem = function(modulus_base);
var getPem = require('rsa-pem-from-mod-exp');

//modulus should be a base64/base64Url string
var modulus =  "niqcAxl7LclB0kE6q9AcAd8EE+0W6AsriR9Fs9T+6QVXl8uiCiAbh/KCyy8X8C2bHsFpNBvwGTqMwHbqZqWBVUvYRtfCFcy3Xmertb09DnOBeWqKS4181kss97JDO6G07QNbuLSWwkkO82CHD1kUmeF5/dof0Ra6bsRXqppdo86NzlgFud+E2s5BM3XwewZVSpA69bwEiXaRDhrsg5mqeOm68VyxE8LQu+895kKsBnTvTueZTrXT+HNaIveoYe8+Lb7b/mZYtlhrDK0i/8EDox85vxnzKZ7wNswqqcDg6vfC2911phSTPh13jv2FIOkjO/WHhHEzRnS2VQqivqIbsQ";

//exponent should be base64/base64url
var exponent = "AQAB";

var pem = getPem(modulus, exponent);
```

In the above example pem will now contain the following string.
```
-----BEGIN RSA PUBLIC KEY-----
MIIBCgKCAQEAniqcAxl7LclB0kE6q9AcAd8EE+0W6AsriR9Fs9T+6QVXl8uiCiAb
h/KCyy8X8C2bHsFpNBvwGTqMwHbqZqWBVUvYRtfCFcy3Xmertb09DnOBeWqKS418
1kss97JDO6G07QNbuLSWwkkO82CHD1kUmeF5/dof0Ra6bsRXqppdo86NzlgFud+E
2s5BM3XwewZVSpA69bwEiXaRDhrsg5mqeOm68VyxE8LQu+895kKsBnTvTueZTrXT
+HNaIveoYe8+Lb7b/mZYtlhrDK0i/8EDox85vxnzKZ7wNswqqcDg6vfC2911phST
Ph13jv2FIOkjO/WHhHEzRnS2VQqivqIbsQIDAQAB
-----END RSA PUBLIC KEY-----
```

## Testing and Code Coverage ##
```javascript
npm test
npm run cover
```

---
_Source: https://npm.io/package/rsa-pem-from-mod-exp · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._