(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)
openssl_pkcs7_verify — Verifies the signature of an S/MIME signed message
$input_filename
,$flags
,$signers_certificates_filename
= null
,$ca_info
= [],$untrusted_certificates_filename
= null
,$content
= null
,$output_filename
= null
openssl_pkcs7_verify() reads the S/MIME message contained in the given file and examines the digital signature.
input_filename
Path to the message.
flags
flags
can be used to affect how the signature is verified - see PKCS7 constants for more information.
signers_certificates_filename
If the signers_certificates_filename
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.
ca_info
If the ca_info
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.
untrusted_certificates_filename
If the untrusted_certificates_filename
is specified, it is the filename of a file containing a bunch of certificates to use as untrusted CAs.
content
You can specify a filename with content
that will be filled with the verified data, but with the signature information stripped.
output_filename
Returns 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.
Version | Description |
---|---|
8.0.0 | signers_certificates_filename , untrusted_certificates_filename , content and output_filename are nullable now. |
7.2.0 | The output_filename parameter was added. |
Note: As specified in RFC 2045, lines may not be longer than 76 characters in the
input_filename
parameter.