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.

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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

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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.

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Changelog

Version	Description
7.2.0	The `p7bfilename` parameter was added.
5.1.0	The `content` parameter was added.

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Notes

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

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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-openssl-pkcs7-verify.html

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References

Manuel PHP : http://php.net

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