I have this following piece of code which stores data in an encrypted 
format and decrypts when given the passwd. When i pass in the text which is 
less than 8 bytes, say for example (a b c), it gets encrypted and decrypted 
without any problem. If i use a larger string (hello there), am getting bad 
decrypt error while decrypting. What am is missing?


function storeContent(postData, store, response) {


var hash = crypto.createHash('sha1');

hash.update(postData, 'utf8');

var passwd = hash.digest('hex');

console.log(passwd);


var cypher = crypto.createCipher('aes192', passwd);

cypher.update(postData, 'utf8', 'hex');

var encrypt = cypher.final('hex');

store[passwd] = encrypt;

console.log(encrypt);


response.writeHead(200, {"Content-Type": "text/plain"});

response.write("Your content is securely stored, use " + passwd + 

" to retrieve it back"); 

response.end();


}


function retrieveContent(passwd, store, response) {


encrypt = store[passwd];


console.log(store);

if (!encrypt) {


response.writeHead(200, {"Content-Type": "text/plain"});

response.write("Incorrect passwd");

response.end();


} else {

var decypher = crypto.createDecipher('aes192', passwd);

console.log(encrypt);

decypher.update(encrypt, 'hex', 'utf8');


response.writeHead(200, {"Content-Type": "text/plain"});

response.write("Stored content: " + decypher.final('utf8'));

response.end();

}

}



crypto.js:286

  var ret = this._binding.final();

                          ^

TypeError: error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad 
decrypt

    at Decipher.Cipher.final (crypto.js:286:27)

    at Object.retrieveContent 
(/Users/kousik/Documents/workspace/EasyCopy/routes/secure.js:45:48)

    at Object.respond [as /respond] 
(/Users/kousik/Documents/workspace/EasyCopy/routes/requestHandlers.js:53:9)

    at route 
(/Users/kousik/Documents/workspace/EasyCopy/routes/router.js:8:19)

    at IncomingMessage.<anonymous> 
(/Users/kousik/Documents/workspace/EasyCopy/routes/server.js:20:4)

    at IncomingMessage.EventEmitter.emit (events.js:92:17)

    at _stream_readable.js:910:16

    at process._tickCallback (node.js:415:13)



Thanks

Kousik

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