Php/docs/function.openssl-pkcs7-verify

• PHP Manual
• OpenSSL Functions
• Verifies the signature of an S/MIME signed message

openssl_pkcs7_verify

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

openssl_pkcs7_verify — Verifies the signature of an S/MIME signed message

Description

openssl_pkcs7_verify ( string $filename , int $flags [, string $outfilename [, array $cainfo [, string $extracerts [, string $content [, string $p7bfilename ]]]]] ) : mixed

openssl_pkcs7_verify() reads the S/MIME message contained in the given file and examines the digital signature.

Parameters

filename

Path to the message.

flags

flags can be used to affect how the signature is verified - see PKCS7 constants for more information.

outfilename

If the 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

If the 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

If the extracerts 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.

p7bfilename

Return Values

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.

Changelog

Version	Description
7.2.0	The p7bfilename parameter was added.

Notes

Note:

As specified in RFC 2045, lines may not be longer than 76 characters in the filename parameter.