3 things: AES: Advanced Encryption Standard. This is the name of the encryption algorithm (symmetric encryption). Other symmetric encryption algorithms are: DES, 3-DES etc. 128: This probably refers to the key size. AES encryption uses 3 key sizes (128bit, 192bit and 256bit). Block size in AES is also 128 bits. CBC: This is the mode … Read more
You can’t just change the delimiters from —- BEGIN SSH2 PUBLIC KEY —- to —–BEGIN RSA PUBLIC KEY—– and expect that it will be sufficient to convert from one format to another (which is what you’ve done in your example). This article has a good explanation about both formats. What you get in an RSA … Read more
In order to make it work you need to convert key from str to tuple before decryption(ast.literal_eval function). Here is fixed code:
Looks like the secret key isn’t on the other machine, so even with the right passphrase (read from a file) it wouldn’t work. These options should work, to Either copy the keyrings (maybe only secret keyring required, but public ring is public anyway) over to the other machine Or export the secret key & then … Read more
A simple way of doing this is to use Password Based Encryption in Java. This allows you to encrypt and decrypt a text by using a password. This basically means initializing a javax.crypto.Cipher with algorithm “AES/CBC/PKCS5Padding” and getting a key from javax.crypto.SecretKeyFactory with the “PBKDF2WithHmacSHA512” algorithm. Here is a code example (updated to replace the less secure MD5-based variant): One problem remains: Where … Read more
A simple way of doing this is to use Password Based Encryption in Java. This allows you to encrypt and decrypt a text by using a password. This basically means initializing a javax.crypto.Cipher with algorithm “AES/CBC/PKCS5Padding” and getting a key from javax.crypto.SecretKeyFactory with the “PBKDF2WithHmacSHA512” algorithm. Here is a code example (updated to replace the … Read more
Security Warning: AES-256-CBC does not provide authenticated encryption and is vulnerable to padding oracle attacks. You should use something like age instead. Encrypt: Decrypt: More details on the various flags
What I’d like to know is simple. Can I use OpenSSL to encrypt a string “hello” with a private key then send it to everyone who can decrypt it with the public key to retrieve the original string. I’ve searched all around and can’t really find anything. Mathematically I can use the private exponent and … Read more
Here is my implementation and works for me with some fixes and enhances the alignment of the key and secret phrase with 32 bytes and iv to 16 bytes:
Once I have a list of providers, as described in JB Nizet’s post, I still don’t have a list of algorithms. I found that each Provider functions as a Properties object, and the Properties encode the algorithm names. I’m not entirely clear on if this is the correct way to look for them or not, … Read more