encrypt file with php and public key

Question

I generated a key pair (public and private), and from console by:

openssl smime -encrypt -aes256 -in backup.sql -binary -DEM -out outform backup_encrypted.sql public_key.pem

I encrypt the file correctly. Sql, as I can do this with php? I've tried several and nothing Functions

Here I leave one of them.

$data=file_get_contents("backup.sql");
$key=file_get_contents("public_key.pem");
openssl_public_encrypt($data,$output,$key);
echo $output;

$output returns nothing .. Thank you.

Before encrypting a file.. Are you using a two way encryption? one to passively encrypt so it cannot be read, and another to decrypt so it can be read? — Daryl Gill
– Daryl Gill, Commented May 23, 2013 at 8:54

HamZa · Accepted Answer · 2013-05-23 08:58:41Z

2

Please take a look at the manual, you have to give the path of the public key:

$data=file_get_contents("backup.sql");
$key="file://path/to/public_key.pem";
openssl_public_encrypt($data,$output,$key);
echo $output;

answered May 23, 2013 at 8:58

HamZa

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3 Comments

Aitor Chicharro Over a year ago

not work.. openssl_public_encrypt works with large text files?

Aitor Chicharro Over a year ago

and got to see the record and get this .. what I was saying .. is there any solution? "error:0406B06E:rsa routines:RSA_padding_add_none:data too large for key size"tt

HamZa Over a year ago

@AitorChicharro What if you tried: openssl_public_encrypt($data,$output,$key, OPENSSL_NO_PADDING); ?

Mohammad Shahnewaz Sarker · Accepted Answer · 2015-11-15 17:49:27Z

1

you can you file_get_contents(), as example:

$data=file_get_contents("backup.sql");
$key= file_get_contents('public_key.pem');
openssl_public_encrypt($data,$output,$key);
echo $output;

I checked this snippets and its working.

answered Nov 15, 2015 at 17:49

Mohammad Shahnewaz Sarker

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