roRSA

The RSA component provides an interface to the OpenSSL RSA library of signing algorithms.

This component can be used to sign/verify using RSA.

Typically, you would use the roEVPDigest component to create a message digest, then use roRSA to sign it.

Example: RSA signing using SHA1

ba = CreateObject("roByteArray")

' ...populate bytearray...

digest = CreateObject("roEVPDigest")
digest.Setup("sha1")
hashString = digest.Process(ba)
hashBA = CreateObject("roByteArray")
hashBA.FromHexString(hashString)
rsa = CreateObject("roRSA")

' ... save private key to tmp:/privateKey.txt

rsa.SetPrivateKey("tmp:/privateKey.txt")
rsa.SetDigestAlgorithm("sha1")
signature = rsa.Sign(hashBA)

Example: RSA verification using SHA1

rsa = CreateObject("roRSA")
rsa.SetPublicKey(:tmp:/publicKey.txt")
rsa.SetDigestAlgorithm("sha1")

' see hashBA and signature from above example

result = rsa.Verify(hashBA, signature)
if (result = 1)
    print "Verified"
else
    print "Not verified, result = " ; result
end if

Supported interfaces

• ifRSA