Reputation: 1

openssl not compatible with forge library?

I am trying to encrypt a message using forge Javascript library and to decipher it using Openssl library suite using RSA algorithm. For some reason, the encrypted message is so corrupt, it can not be deciphered. Most likely I am missing somewhere something basic such as importing correctly the public key into forge. Please note: I am using version 1.0.0 of the forge library.

The error I get when trying to decrypt is this (see also below):

Public Key operation error 4050F776:error:0200009F:rsa routines:RSA_padding_check_PKCS1_type_2:pkcs decoding error:../crypto/rsa/rsa_pk1.c:269: 4050F776:error:02000072:rsa routines:rsa_ossl_private_decrypt:padding check failed:../crypto/rsa/rsa_ossl.c:499:

Can somebody lend me a hand of help?

First the Javascript code I came up with:

 <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/forge.min.js"></script>
 <script type='text/javascript'>
    function encryptMsg(msg) {
        var publicKeyStr = "-----BEGIN PUBLIC KEY-----\n" +
        "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlUQyQ4nO6kv/MPDZxHcO\n" +
        "4vcLpzRAMxhRVkOXH2o2kjJYAjYd5K//29N4QhKYS3pRC+s4iZX6pL5OIMojpxjd\n" +
        "vCwlHQ2OdouTGT1qDBAc+bfcF6C6m6u8dfSEOZn9+hWl9TL8wgtLNp07L5//2VT5\n" +
        "zk2RIIraYOf1RFuVoFd3d4Bwv7sNkLVzw9rBgXpj6NnBpxD4w3m33NAVAblXteYi\n" +
        "nq/SOn+4wTkPqkFzQm70dWfzOiRiz1OJBYR3Wn6ripuqoQ1qD0n7EEMoTdGfIeDP\n" +
        "SHD2pt2CM27ZXUOPi11IUG9aS9ExmPS0Gz8IClSIcW+ErV/QYW4X/5PHDt2rtwg+\n" +
        "TQIDAQAB\n" +
        "-----END PUBLIC KEY-----"
        console.log(publicKeyStr)
        var msg = forge.pem.decode(publicKeyStr)[0]
        var obj = forge.asn1.fromDer(msg.body);
        var publicKey = forge.pki.publicKeyFromAsn1(obj)
        var encrypted = publicKey.encrypt(msg)

        //
        // Dump the encrypted messsage as base64 string
        //
        var anArray = Uint8Array.from(encrypted.split("").map(x => x.charCodeAt()))
        var buffer = forge.util.binary.base64.encode(anArray, 64)
        console.log(buffer)
    }

Content of private key file:

When running above Javascript code under Firefox (as part of a minimal webpage not shown here), I get this on Javascript console:

Next I copied the encrypted message above and saved it to file (encrypted.base64) and after that I have attempted to decrypt it using Openssl with a command like this:

$ cat encrypted.base64 | base64 -d | openssl pkeyutl -decrypt -in /dev/stdin   -out /dev/stdout  -inkey privatekey.pem
Public Key operation error
4050F776:error:0200009F:rsa routines:RSA_padding_check_PKCS1_type_2:pkcs decoding error:../crypto/rsa/rsa_pk1.c:269:
4050F776:error:02000072:rsa routines:rsa_ossl_private_decrypt:padding check failed:../crypto/rsa/rsa_ossl.c:499:

I suspect the root of the problem is the corrupted encryption key, but then what is the proper way to import ssl generated keys into "forge" library?

Upvotes: 0

openssl not compatible with forge library?

Answers (0)

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