Sign a File to Create a .p7m File

Python example to sign a file creating a .p7m file as output. The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M.

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import sys
import chilkat

crypt = chilkat.CkCrypt2()

#  Any string argument automatically begins the 30-day trial.
success = crypt.UnlockComponent("30-day trial")
if (success != True):
    print "Crypt component unlock failed"
    sys.exit()

#  Find our digital certificate from the Current User certificate store.
ccs = chilkat.CkCreateCS()

certStore = ccs.OpenCurrentUserStore()

cert = certStore.FindCertBySubjectCN("Chilkat Software, Inc.")
if (cert == None ):
    print cert.lastErrorText()

    sys.exit()

#  Tell the crypt component to use this cert.
crypt.SetSigningCert(cert)

#  We can sign any type of file, creating a .p7s as output:
success = crypt.CreateP7M("test.xml","test.p7m")
if (success == False):
    print crypt.lastErrorText()

    sys.exit()

#  Verify and restore the original file:
crypt.SetVerifyCert(cert)

success = crypt.VerifyP7M("test.p7m","testRestored.xml")
if (success == False):
    print crypt.lastErrorText()

    sys.exit()

print "Success!"