(Ruby) Create PKCS7 Signed File (.p7m)

Demonstrates how to sign a file to create a .p7m that contains both the file contents and the signature.

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

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

crypt = Chilkat::CkCrypt2.new()

certStore = Chilkat::CkCertStore.new()

# Load a PFX file into a certificate store object.
success = certStore.LoadPfxFile("myPfx.pfx","pfxPassword")
if (success != true)
    print certStore.lastErrorText() + "\n";
    exit
end

# Get the certificate by subject common name.
# This should be the cert within the PFX that also
# has a private key (also stored within the PFX).
# cert is a CkCert
cert = certStore.FindCertBySubjectCN("myCert")
if (certStore.get_LastMethodSuccess() == false)
    print certStore.lastErrorText() + "\n";
    exit
end

# Tell the crypt object to use the certificate for signing:
success = crypt.SetSigningCert(cert)

# Sign a file, producing a .p7m as output.
# The input file is unchanged, the test.p7m contains the 
# contents of the input file and the signature.
inFile = "test.txt"
outFile = "testp7m"
success = crypt.CreateP7M(inFile,outFile)
if (success != true)
    print crypt.lastErrorText() + "\n";
    exit
end

print "Success!" + "\n";