(Tcl) PKCS7 Encrypt MIME

Encrypt MIME using a digital certificate to create PKCS7 encrypted S/MIME.

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load ./chilkat.dll

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

set mime [new_CkMime]

# Build a simple MIME message to be encrypted:
set success [CkMime_AddHeaderField $mime "Content-Type" "text/plain"]
set success [CkMime_AddHeaderField $mime "abc" "123"]
CkMime_SetBody $mime "This is a test"

# A digital certificate is required to create PKCS7 encrypted MIME.
# It can come from a variety of sources: .cer file, .pfx file, PEM files,
# an in-memory representation, or directly from a Windows
# registry-based certificate store.

# This example will load a certificate object from a .cer file.
# Note: Only the public-key is required to encrypt.  (Decryption
# requires a private key.)

set cert [new_CkCert]

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

# Encrypt the MIME:
set success [CkMime_Encrypt $mime $cert]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    delete_CkCert $cert
    exit
}

# Display the MIME:
puts [CkMime_getMime $mime]

# The resulting S/MIME looks something like this:

# abc: 123
# Content-Disposition: attachment; filename="smime.p7m"
# Content-Transfer-Encoding: base64
# Content-Type: application/x-pkcs7-mime;
#  name="smime.p7m"
# 
# MIICAQYJKoZIhvcNAQcDoIIB8jCCAe4CAQAxggGFMIIBgQIBADBpMFUxCzAJBgNVBAYTAlpBMSUw
# IwYDVQQKExxUaGF3dGUgQ29uc3VsdGluZyAoUHR5KSBMdGQuMR8wHQYDVQQDExZUaGF3dGUgQ29k
# ZSBTaWduaW5nIENBAhB4ouTcAmLszrGi170k1deSMA0GCSqGSIb3DQEBAQUABIIBABz59iwVufLZ
# QIPs0whUYMtBjIQxg5IOCxpoKJeJmLVzu9Q5Q1poxG9uYOveybS9c4wbl5A0DFfKTW5O4HhHcOHW
# TgcH4iqdwhiFWm/q9d5rjceJWBFQsGOcgoXSU/U2Xp+N47/+Pqyc5XJbxKnOc4YhPzO320JZsNB6
# p1NGk5SNnWqgbUDmEnfH8ZPHSV7dNi2aiFALYTyLjyp0lqJCsdZ524OPTZFfusrl/9ibPAW7jKuI
# FgDCcBtRJvolVF8iIHxaTw4rhk0qb1KWzxvB5j9HSLdyIKIPhZbxeS10bx18YkSsBlKfdKRalQag
# 3oWSRdsK9/N75YHG8Pm+x9BOHUAwYAYJKoZIhvcNAQcBMBkGCCqGSIb3DQMCMA0CAToECAb+toBW
# txZigDhGZKSpUpuTiWvvSMemX/c79sSnMpuefVwGKFTDgXVLE2SoD5a9Yh5vcG7Mhl2IkilVwOMc
# fi23+g==

delete_CkMime $mime
delete_CkCert $cert