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08 solution proposal taking arguments #32

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08 solution proposal taking arguments #32

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36 changes: 28 additions & 8 deletions problems/09.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,24 +5,44 @@

```js
// sign.js
// usage:
// node sign.js "message"
// signature and publickey will be in hex format
var sodium = require('sodium-native')
const args = process.argv.slice(2)
const messageString = args[0]

var publicKey = Buffer.alloc(sodium.crypto_sign_PUBLICKEYBYTES)
var secretKey = Buffer.alloc(sodium.crypto_sign_SECRETKEYBYTES)
sodium.crypto_sign_keypair(publicKey, secretKey)

var message = Buffer.from('Hello world!')
const messageBuffer = Buffer.from(messageString)
var publickey = Buffer.alloc(sodium.crypto_sign_PUBLICKEYBYTES)
var secretkey = Buffer.alloc(sodium.crypto_sign_SECRETKEYBYTES)
var signature = Buffer.alloc(sodium.crypto_sign_BYTES)

sodium.crypto_sign_detached(signature, message, secretKey)
sodium.crypto_sign_keypair(publickey, secretkey)

sodium.crypto_sign_detached(signature, messageBuffer, secretkey)

console.log('Public key: ' + publicKey.toString('hex'))
console.log('Message: ' + message.toString())
console.log('Signature: ' + signature.toString('hex'))
console.log('Message: "' + messageBuffer.toString()+'"')
console.log('Public key: ' + publickey.toString('hex'))
```

```js
// verify.js
// usage:
// node verify.js signature "message" publickey
// signature and publickey should be in hex format

var sodium = require('sodium-native')
const args = process.argv.slice(2)
var publickey = Buffer.alloc(sodium.crypto_sign_PUBLICKEYBYTES)
var signature = Buffer.alloc(sodium.crypto_sign_BYTES)

signature = Buffer.from(args[0],'hex')
message = Buffer.from(args[1])
publickey = Buffer.from(args[2],'hex')

const isValid = sodium.crypto_sign_verify_detached(signature,message,publickey)
console.log("isValid: "+isValid)

```

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