My output is of 256 length which is alpha-numeric while checking I got modulus and exponent in dev tools

Question

My input : 09876543212
Modulus : 5ad283c0c4922f5c12a4c4040f7ec5cd316c984f4e74edc99bf92eb19f40f430b5903a1a4b8d0e39512205769c3575679ed2abf4516bd9cb6f5e3391b1cc2254babb63fb0cf8cb878438851cb3bbc4f3a1728ef6d84871b3ff1ec2f31361fc527e6ff87056712c9d72ebcb7536b50bc0856cc8c4c05088a41f83e954f3e49c91
Exponent : 10001
Output : is alpha numeric 256 length

From my under standing I come to now it is using rsa encryption and sha 256 to convert my output in precise length
Help me to use it in jmeter

Answer 1

What do you want exactly? RSA-encode your "input" with the public key create from your modulus and exponent?

If yes you can use a suitableJSR223 Test Element and the following sample code (you might need to amend it according to your needs)

def modulus = '5ad283c0c4922f5c12a4c4040f7ec5cd316c984f4e74edc99bf92eb19f40f430b5903a1a4b8d0e39512205769c3575679ed2abf4516bd9cb6f5e3391b1cc2254babb63fb0cf8cb878438851cb3bbc4f3a1728ef6d84871b3ff1ec2f31361fc527e6ff87056712c9d72ebcb7536b50bc0856cc8c4c05088a41f83e954f3e49c91'
def exponent = '10001'

def modulusInt = new BigInteger(modulus, 16)
def exponentInt = new BigInteger(exponent, 16)

def keySpec = new java.security.spec.RSAPublicKeySpec(modulusInt, exponentInt)
def keyFactory = java.security.KeyFactory.getInstance("RSA")

publicKey = keyFactory.generatePublic(keySpec)

def input = '09876543212'

def cipher = javax.crypto.Cipher.getInstance("RSA/ECB/NoPadding")
cipher.init(javax.crypto.Cipher.ENCRYPT_MODE, publicKey)

def encryptedValue = cipher.doFinal(input.getBytes())

log.info('Encrypted value: ' + encryptedValue.encodeBase64().toString())

Demo:

More information on Groovy scripting in JMeter: Apache Groovy: What Is Groovy Used For?