openssl_pkcs7_verify

PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8
openssl_pkcs7_verify - Verifies the signature of an S/MIME signed message
Manual

openssl_pkcs7_verify(
     string$input_filename,
     int$flags,
     [string|null$signers_certificates_filename = null],
     [array$ca_info = []],
     [string|null$untrusted_certificates_filename = null],
     [string|null$content = null],
     [string|null$output_filename = null]
): bool|int

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

Parameters

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

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.

Notes

Note:

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

Changelog

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.

Function openssl_pkcs7_verify:

  • Manual

OpenSSL Functions

Most used PHP functions