Tcl

ConvertToSignedPk

See more MIME Examples

Demonstrates how to digitally sign MIME to create an "opaque" signature. The MIME is converted to an application/x-pkcs7-mime which is a PKCS7 signature that includes both the original MIME message and the signature. This is different than AddDetachedSignaturePk, where the signature is appended to the MIME. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key. Tcl

load ./chilkat.dll

set success 0

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

set mime [new_CkMime]

# Load the certificate from a .cer file.
set cert [new_CkCert]

set success [CkCert_LoadFromFile $cert "aaworkarea/myCert.cer"]
if {$success == 0} then {
    puts [CkCert_lastErrorText $cert]
    delete_CkMime $mime
    delete_CkCert $cert
    exit
}

# Load the private key from an encrypted PEM file.
# (A private key can be loaded from other file formats also..)
set privKey [new_CkPrivateKey]

set success [CkPrivateKey_LoadEncryptedPemFile $privKey "aaworkarea/myPrivateKey.pem" "myPassword"]
if {$success == 0} then {
    puts [CkPrivateKey_lastErrorText $privKey]
    delete_CkMime $mime
    delete_CkCert $cert
    delete_CkPrivateKey $privKey
    exit
}

set success [CkMime_SetBodyFromPlainText $mime "This is the plain-text MIME body."]

# Convert the MIME to application/x-pkcs7-mime, which
# is PKCS7 containing both the original content and the signature.
set success [CkMime_ConvertToSignedPk $mime $cert $privKey]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    delete_CkCert $cert
    delete_CkPrivateKey $privKey
    exit
}

# Save the S/MIME to a file.
set success [CkMime_SaveMime $mime "aaworkarea/opaqueSignedMime.txt"]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    delete_CkCert $cert
    delete_CkPrivateKey $privKey
    exit
}

puts "success!"

delete_CkMime $mime
delete_CkCert $cert
delete_CkPrivateKey $privKey