(Ruby) Load RSA Public Key from Hex Modulus and Exponent

Load an RSA public key from a hex modulus and exponent.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'



# Load a 128-byte (1024-bit) modulus + exponent into a Chilkat public key object..
modulus = "BF5F4AF9A018B5F324A0C10448C0D3248D9BE78967FDC551A27876AC5789ADCBA8245D3D942AE3799563D895DA801E765D225A54FA15DAB2C4731DD817DCF94A9AD62197074C2349442093A206234BF3747F0E88AA6F538355684CC1FB26FCE029C9050A1DAF9F507C2BABF6EFC9FB16320C8036721BE0279FBB76122C41E429"

exponent = "00000003"

# We'll need to re-encode from hex to base64..
bdModulus = Chilkat::CkBinData.new()
bdModulus.AppendEncoded(modulus,"hex")
bdExponent = Chilkat::CkBinData.new()
bdExponent.AppendEncoded(exponent,"hex")

xml = Chilkat::CkXml.new()
xml.put_Tag("RsaKeyValue")
xml.NewChild2("Modulus",bdModulus.getEncoded("base64"))
xml.NewChild2("Exponent",bdExponent.getEncoded("base64"))

# Now load into the pubkey object..
pubkey = Chilkat::CkPublicKey.new()
success = pubkey.LoadFromString(xml.getXml())
if (success == false)
    print pubkey.lastErrorText() + "\n";
    exit
end

print "Success." + "\n";