02-09-2011
SSL/TLS uses the public key to encrypt data ?
Hi,
I have a doubt..whether the SSL/TLS protocol uses the public key of the web server to encrypt data before sending it.
I knew the browser verifies the public key of the web server using the digital certificate (by verifying the signature of the certificate using trusted authority). whether the same public key is used to encrypt data ?
Regards,
Chaitanya.
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
We have a requirement to setup secure ftp between our AIX v5.3 system and
our mainframe. We don't want to use openssh with sftp and scp. Our mainframe uses ftp over ssl/tls so we have to use this on our AIX box. We have openssl on our AIX system but I'm not sure how to setup ssl/tls over ftp
on... (4 Replies)
Discussion started by: DANNYC
4 Replies
2. UNIX for Dummies Questions & Answers
Hi everyone,
I have a quick/newb question:
I know that a public key is used to encrypt data and a private key is used to decrypt data but who keeps the public/private keys??
Does the Web Server hold both?
Does the Web Server have the public key and does the client have the private key? ... (3 Replies)
Discussion started by: tical00
3 Replies
3. Cybersecurity
Here's a pretty good, and even PHB-compatible, explanation of the current TLS/SSl protocol vulnerability, including samples. (0 Replies)
Discussion started by: pludi
0 Replies
4. UNIX for Dummies Questions & Answers
hi guys
I configured my openldap but now I want to implement SSL-TLS
This is my basic slapd.conf configuration
include /etc/openldap/schema/core.schema
include /etc/openldap/schema/cosine.schema
include /etc/openldap/schema/inetorgperson.schema
include ... (2 Replies)
Discussion started by: karlochacon
2 Replies
5. Solaris
Hi, I've used the following way to set ssh public key authentication and it is working fine on Solaris 10, RedHat Linux and SuSE Linux servers without any problem. But I got error 'Server refused our key' on Solaris 8 system. Solaris 8 uses SSH2 too. Why? Please help. Thanks.
... (1 Reply)
Discussion started by: aixlover
1 Replies
6. Red Hat
Hi guys, Those who work on Apache may help me on this.
I have following problem
Description:
The remote service encrypts traffic using TLS / SSL and permits clients to renegotiate
connections. The computational requirements for renegotiating a connection are
asymmetrical between the... (3 Replies)
Discussion started by: manalisharmabe
3 Replies
7. UNIX for Advanced & Expert Users
Hey Guys,
I am trying to setup ldap over tls in our lab. I am generating a self signed cert on the ldap server and importing that into the ldap system so it will use ldap over port 636. The clients will be a mix of solaris and redhat. I am lost on what I need to do on the client side to get... (0 Replies)
Discussion started by: s ladd
0 Replies
8. Shell Programming and Scripting
Hello,
I use the following SSH script to upload *.jpg files via FTP:
#!/usr/bin/expect
set timeout -1
spawn ftp -v -i
expect ""
send "\r"
expect "Password:"
send "\r"
expect "ftp>"
send "mput *.jpg\r"
expect "ftp>"
send "quit\r"
replaced with actual ftp server/account data.
... (5 Replies)
Discussion started by: mrpi007
5 Replies
9. UNIX for Advanced & Expert Users
Hello to all,
I'm beguinner in Linux instalations and I'm trying to Communicate from Web Sites that i have running under apache with openLDAP for users authentication using SSL mediation that seems to be connected with LDAPS.
Can someone advise me how to do this, I have already installed... (1 Reply)
Discussion started by: CPMarco
1 Replies
LEARN ABOUT PHP
openssl_verify
OPENSSL_VERIFY(3) 1 OPENSSL_VERIFY(3)
openssl_verify - Verify signature
SYNOPSIS
int openssl_verify (string $data, string $signature, mixed $pub_key_id, [mixed $signature_alg = OPENSSL_ALGO_SHA1])
DESCRIPTION
openssl_verify(3) verifies that the $signature is correct for the specified $data using the public key associated with $pub_key_id. This
must be the public key corresponding to the private key used for signing.
PARAMETERS
o $data
- The string of data used to generate the signature previously
o $signature
- A raw binary string, generated by openssl_sign(3) or similar means
o $pub_key_id
- resource - a key, returned by openssl_get_publickey(3) string - a PEM formatted key, example, "-----BEGIN PUBLIC KEY-----
MIIBCgK..."
o $signature_alg
- int - one of these Signature Algorithms. string - a valid string returned by openssl_get_md_methods(3) example, "sha1WithRSAEn-
cryption" or "sha512".
RETURN VALUES
Returns 1 if the signature is correct, 0 if it is incorrect, and -1 on error.
CHANGELOG
+--------+------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+------------------------------------------+
| 5.2.0 | |
| | |
| | The $signature_alg parameter was added. |
| | |
+--------+------------------------------------------+
EXAMPLES
Example #1
openssl_verify(3) example
<?php
// $data and $signature are assumed to contain the data and the signature
// fetch public key from certificate and ready it
$pubkeyid = openssl_pkey_get_public("file://src/openssl-0.9.6/demos/sign/cert.pem");
// state whether signature is okay or not
$ok = openssl_verify($data, $signature, $pubkeyid);
if ($ok == 1) {
echo "good";
} elseif ($ok == 0) {
echo "bad";
} else {
echo "ugly, error checking signature";
}
// free the key from memory
openssl_free_key($pubkeyid);
?>
Example #2
openssl_verify(3) example
<?php
//data you want to sign
$data = 'my data';
//create new private and public key
$private_key_res = openssl_pkey_new(array(
"private_key_bits" => 2048,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
));
$details = openssl_pkey_get_details($private_key_res);
$public_key_res = openssl_pkey_get_public($details['key']);
//create signature
openssl_sign($data, $signature, $private_key_res, "sha1WithRSAEncryption");
//verify signature
$ok = openssl_verify($data, $signature, $public_key_res, OPENSSL_ALGO_SHA1);
if ($ok == 1) {
echo "valid";
} elseif ($ok == 0) {
echo "invalid";
} else {
echo "error: ".openssl_error_string();
}
?>
SEE ALSO
openssl_sign(3).
PHP Documentation Group OPENSSL_VERIFY(3)