Function openMessage

vmm/src/x25519.js:1572–1584

* Verifies signed message with the public key and returns the original message without signature if it's correct or null if verification fails. * * @export * @param {Uint8Array} publicKey * @param {*} signedMsg * @returns Message

(publicKey, signedMsg)

     * @returns Message
     */
    function openMessage(publicKey, signedMsg) {
        checkArrayTypes(signedMsg, publicKey);
        if (publicKey.length !== 32)
            throw new Error('wrong public key length');
        var tmp = new Uint8Array(signedMsg.length);
        var mlen = curve25519_sign_open(tmp, signedMsg, signedMsg.length, publicKey);
        if (mlen < 0)
            return null;
        var m = new Uint8Array(mlen);
        for (var i = 0; i < m.length; i++)
            m[i] = tmp[i];
        return m;
    }
    /**
     * Signs the given message using the private key and returns signature.
     *