Hi,
>> var decipher = crypto.createDecipher('aes-256-cbc',binkey, biniv);
I think you want crypto.createDecipheriv here, instead of
crypto.createDecipher.
crypto.createDecipheriv(algorithm, key, iv)
creates and returns a decipher object, with the given algorithm, key and
iv. This is the mirror of
thecreateCipheriv()<http://nodejs.org/api/crypto.html#crypto_crypto_createcipheriv_algorithm_key_iv>
above
-Kelsey
On Thu, Jun 27, 2013 at 7:57 AM, Thijs Koerselman <[email protected]
> wrote:
> Hi,
>
> I'm trying to encrypt some string in C#, send it to a Node server and
> decrypt it there. I am having a hard time because I keep getting this error:
>
> TypeError: error:06065064:digital envelope
> routines:EVP_DecryptFinal_ex:bad decrypt
> at Decipher.Cipher.final (crypto.js:257:27)
>
> I have tried different AES modes and key sizes but it didn't help. Just
> for testing I'm sending a json post to the server containing base64 encoded
> versions of key, iv and the encrypted string (fingerprint in this example).
>
> In the post request handler I do this:
>
> var crypto = require('crypto');
> var key = req.body.key;
> var iv = req.body.iv;
> var binkey = new Buffer(key, 'base64');
> var biniv = new Buffer(iv, 'base64');
>
> var crypted = req.body.fingerprint;
> var bincrypted = new Buffer(crypted, 'base64');
> var decipher = crypto.createDecipher('aes-256-cbc',binkey, biniv);
> var dec = decipher.update(bincrypted,'binary','utf8');
> dec += decipher.final('utf8');
> console.log("dec", dec);
>
> To be sure I'm using the same Aes mode and padding on the encryption this
> is what's reported by my C# Aes, including the JSON being sent.
>
> Keysize 256
> Mode CBC
> Padding PKCS7
> Key: YJAG4xYTTQ0Ke3FBIDgmobERgbi/Tl/LYt9cNmt5w0g=
> IV :VUdInSdIlCLS/D3AbXhhnQ==
> json: {
> "fingerprint" : "a7pNFC3Bnac7Y/k7/b+b4jHdH5CE/nbu23Mmj9pAhZw=",
> "key" : "YJAG4xYTTQ0Ke3FBIDgmobERgbi/Tl/LYt9cNmt5w0g=",
> "iv" : "VUdInSdIlCLS/D3AbXhhnQ=="
> }
>
> Am I overlooking something maybe?
>
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