I have a webhook that sends a header, which needs to be verified. Below are some details: Problem : The Java method always returns false. The provided header and body are correct and should result as TRUE. As per docs from the provider : Signature = Base64(RSA512(WEBHOOK_PRIVATE_KEY, SHA512(eventBody))) Publi…
Tag: rsa
How to decrypt a password protected RSA key in java?
I’m writing a code to consume a private key to encrypt and decrypt a message. The problem is that the key i use is protected by a passphrase. So i have to decrypt the key itself before use it to encrypt and decrypt. This is the header of the key content: How can I achieve that in Java? Answer This
RSA decryption according to the private key reports an error
My code using RSA on the front end： My code using RSA in the backend： PublicKey like this: PrivateKey like this: Bu-t, when i do the java code decryption, it reported such an error： How can i solve this problem ? Answer 1. You are decoding wrong. PEM format has a dash-BEGIN line identifying the type of data, …
How to use public key to encrypt data and use base64 encode it in python?
I want to implement the following function using python, it uses public key to encrypt the password and then using base64 to encode it. I have searched many answers but I didn’t find a solution, I think probably I didn’t understand them. Would you please give me some advice? I use the following co…
Java Decrypt with NodeJS Encrypt padding and oaepHash
I need to decrypt some information coming from an external service built with NodeJS. This service ask for a RSA (2048) public key in pem format in base64, in order to encrypt the information. I am creating the key pair in Java: The external service is encrypting the information as follows and is returning th…
how to construct a java.security.interfaces.RSAPublicKey?
I have the following string, which I understand to be an RSA public key: I need to construct a java.security.interfaces.RSAPublicKey from this string. First I tried calling RSAPublicKeyImpl.newKey(myString.getBytes(StandardCharsets.UTF_8)), but that threw the following exception: Then, following an online gui…
trying to convert Java RSA-PSS signature verification code (with SHA256 hash, SHA1 MGF hash) to Python
Here’s my Java code, which successfully verifies the signature, as expected. The full code (with the imports, keys, message and signature) can be seen at https://pastebin.com/PmhGDaPv in case you want to try to reproduce the issue. My Python code, which does not verify the signature, as expected: The fu…
Encryption/Decryption with bouncycastle-java and RSAES-OAEP
I am not an expert with encryption, but i am trying to create an CMSEnvelopedDataGenerator with bouncycastle 1.67, where the session key is encrypted with RSAES-OAEP (1.2.840.113549.1.1.7) For now my code looks like this: It runs through but when i check it via openssl asn1parse, i see and then the hex dump. …
Rebuild of a RSA Private Key from modulus & exponent fails
I’m trying to rebuild a RSA keypair from modulus & private/public exponents. The conversion works correct for the public key but fails to private key when comparing the encoded private keys. When using this rebuild private/public keypair for encryption it works (!) in Java, but when using the rebuil…
decode south african za-drivers-license
In reference to this discussion: Decode South African (ZA) Drivers License Please assist I seem to be getting an error trying to create PublicKey instance in Java on android. I have pasted the error below: Here is the code snippet: Answer The encoded public keys you’re trying to read are not of the form…