Tag: cryptography

Verifying an ECDSA P-384 or P-256 signature with PHP 8

cryptography ecdsa javascript php public-key-encryption

I would like to sign the message “hello” on the browser using SubtleCrypto with ECDSA curve P-384 or P-256, then verify the signature on the server with PHP 8. On the browser, I generate a keypair and use it to sign the message: I then send pk_hex and sign_hex to the server. This is what they look like: On the

Converting a php cryptography and hash_hmac(‘sha512’ code to c#

c# cryptography php

I am having troubles converting a cryptography code from php to c#, and i would really appreciate some help, here is the php code example data are the following: what i did so far is i am stuck in these two lines and i have no idea if i translate it them right Answer To compare both implementations, sample data

Using Libsodium with PHP on WAMP

cryptography libsodium pear php

I’m having really hard trouble installing libsodium on my local server (WAMP64). I used this guide and many others, but still no luck. I successfully installed PEAR but I can’t use it to install the PHP wrapper of libsodium. Can someone post a little guide step by step to help me? I would appreciate help installing Halite, wich needs libsodium,

RSA Encryption in Java / Decryption in PHP Fails

android cryptography java php rsa

I have a PHP script that I have been using do decrypt a session key that I encrypted from iOS. The encryption is done on the client using a 1024-bit public key. Decryption on the server side is done with the corresponding private key. Now I’m trying to write an encryption method for Android. Unfortunately, the decryption continues to fail,

looking for c# equivalent of php’s password-verify()

c# cryptography passwords php

I need to import a bunch of user accounts Moodle into a system written in c#. Moodle uses password_hash() function to create hashes of passwords. I need to be able to verify these passwords in c#. In other words I looking for a c# implementation of PHP’s password verify function ( http://www.php.net/manual/en/function.password-verify.php ). I’ve googled a bit but couldn’t really

How do you Encrypt and Decrypt a PHP String?

cryptography encryption encryption-symmetric php security

What I mean is: Maybe something like: In PHP, how can you do this? Attempted to use Crypt_Blowfish, but it didn’t work for me. Answer Updated PHP 7 ready version. It uses openssl_encrypt function from PHP OpenSSL Library.

Simplest two-way encryption using PHP

cryptography encryption encryption-symmetric php security

What is the simplest way of doing two way encryption in common PHP installs? I need to be able to encrypt data with a string key, and use the same key to decrypt on the other end. The security isn’t as big of a concern as the portability of the code, so I’d like to be able to keep things