pkcs7_sign

Sign an S/MIME message

Syntax

Function pkcs7_sign (infilename As String, outfilename As String, signcert, privkey, [headers], [flags], [extracerts]) As Boolean

pkcs7_sign() takes the contents of the file named infilename and signs them using the certificate and it's matching private key specified by signcert and privkey parameters.

headers is an array of headers that will be prepended to the data after it has been signed (see pkcs7_encrypt() for more information about the format of this parameter.

flags can be used to alter the output - see PKCS7 constants - if not specified, it defaults to PKCS7_DETACHED.

extracerts specifies the name of a file containing a bunch of extra certificates to include in the signature which can for example be used to help the recipient to verify the certificate that you used.