I am using TCPDF to sign PDF, but when running the example 52 I got this error:
Warning: openssl_pkcs7_sign() [function.openssl-pkcs7-sign]: error getting
private key in C:\xampp\htdocs\this\tcpdf\tcpdf.php on line 8366
Could you please tell me or guide me where is the problem. I am just running the example without changing anything. I am using xampp.
The problem is with the location from where it tries to access the private key. Instead of '' like in their example use 'file://'.( dirname(FILE)).'./path/to/file'. This worked for me.
I solved it by using:
$certificate = 'file://'.realpath('../tcpdf.crt');
When you create your own certificate use this:
/*
NOTES:
- To create self-signed signature: openssl req -x509 -nodes -days 365000 -newkey rsa:1024 -keyout tcpdf.crt -out tcpdf.crt
- To export crt to p12: openssl pkcs12 -export -in tcpdf.crt -out tcpdf.p12
- To convert pfx certificate to pem: openssl pkcs12 -in tcpdf.pfx -out tcpdf.crt -nodes
*/
Finally, after weeks ago, I found the solution. I just donwloaded the TCPDF 5.9 Version and it works :D if you wanna try, here's the link to download that version
来源：https://stackoverflow.com/questions/7096877/warning-openssl-pkcs7-sign-function-openssl-pkcs7-sign-error-getting-priva