PHP using openssl_verify to validate signature instance program _php Tutorial

Let's take a look at the PHP use openssl_verify verification Signature Instance program, hope this article will help you.

The code is as follows

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!--? php /** * Verify signature * tobeverified to be verified signature redaction * PlainText signature Clear Text * Ce Rtfile signer Public key certificate * Return validation successfully returns TRUE, Failure returns false (the reason for failure from the Lasterrmsg property) */ Function verifymsg ($ Tobeverified, $PlainText, $CertFile, $signature _alg=openssl_algo_sha1) { //Check with public key $FP =fopen ($ CertFile, "R"); if (! $fp) { //echo "error number:-10005, error description:er_find_cert_failed (certificate not found)"; return false; } $pub _key=fread ($fp, 8192); Fclose ($FP); $res = Openssl_get_publickey ($pub _key); if (1==openssl_verify ($PlainText, Pack ("H". strlen ($TobeVerified), $TobeVerified), $res, $signature _alg)) { br> //print ("www.bKjia.c0m prompts you: Verify success.") "); return true; } Else { //echo "error number:-10021, error Description:er_verify_error (verification failed) |". Openssl_error_string (); return false; } } ?;

Openssl_verify may have three return values of 1,0,-1, and only 1 is returned to verify that the signature was successful.

$signature _alg default OPENSSL_ALGO_SHA1, if DSA encryption is set to Openssl_algo_dss1

http://www.bkjia.com/PHPjc/632817.html www.bkjia.com true http://www.bkjia.com/PHPjc/632817.html techarticle Let's take a look at the PHP use openssl_verify verification Signature Instance program, hope this article will help you. Code to copy code as follows? PHP/** * Verify signature ...

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