(PHP 4 >= 4.0.6, PHP 5, PHP 7)
openssl_pkcs7_verify — Verifies the signature of an S/MIME signed message
openssl_pkcs7_verify() reads the S/MIME message contained in the given file and examines the digital signature.
Path to the message.
flags can be used to affect how the signature is
verified - see PKCS7 constants
for more information.
outfilename is specified, it should be a
string holding the name of a file into which the certificates of the
persons that signed the messages will be stored in PEM format.
cainfo is specified, it should hold
information about the trusted CA certificates to use in the verification
process - see certificate
verification for more information about this parameter.
extracerts is specified, it is the filename
of a file containing a bunch of certificates to use as untrusted CAs.
You can specify a filename with
content that will
be filled with the verified data, but with the signature information
TRUE if the signature is verified,
FALSE if it is not correct
(the message has been tampered with, or the signing certificate is invalid),
or -1 on error.
Note: As specified in RFC 2045, lines may not be longer than 76 characters in the