Google have recently announced that they are going to start reporting that SSL certificates that are signed with a SHA-1 Hash will be treated as having a lower security than those signed with newer, higher strength hashes such as SHA-256 or SHA-512.
Google’s announcement can be found here at http://googleonlinesecurity.blogspot.co.uk/2014/09/gradually-sunsetting-sha-1.html
Technically at the moment there isn’t anything really wrong with the SHA-1 hash function, but it is now quite old and is starting to show potential cracks. Hence the reason that the security industry is advising to move to something better. In this case SHA-256.
1. Generate a SSL Key File
Firstly you will need to generate a key file. Free windows xp activation key. The example below will generate a 2048 bit key file with a SHA-256 signature.
If you want extra security you could increase the bit lengths.
Openssl Generate Rsa Pkcs8
** Please note that both these examples will not add a password to the key file. To do that you will need to add -aes256 to the command.
2. Create a Certificate Signing Request (CSR)
Openssl Generate Rsa 256 Key Pair 1
This step will create the actually request file that you will submit to the Certificate Authority (CA) of your choice.
You can check that your Certificate Signing Request (CSR) has the correct signature by running the following.
I am trying to generate RSA 1024 key pair (public/private) using the following command openssl genrsa -des3 -out server.key 1024 In the server.key file, only RSA private block is there, so where.
Openssl Generate Rsa 256 Key Pair Key
Need for speed pro street cd key generator. It should display the following if the signature is correct.
3. Install the Certificate (CRT)
This step is very dependant of the software you use and I won’t really cover. All I will say is that these certificates are supported by a multitude of software, including Apache HTTPD and NGINX.
4. Test your installed Certificate
This step is extremely important and will show you any security problems with your SSL configuration.
Qualys have a free hosted service that tests the SSL configuration of Internet facing web servers for SSL issues. The sites tested are rated from A to F, and a report is generated. This report is really useful for tuning your SSL configuration.
The SSL Labs tests are regularly updated when new issues are discovered. This means that if your server is rated as A today, next week it maybe rated as C.
How to generate keys in PEM formatusing the OpenSSL command line tools?
RSA keys
The JOSE standard recommends a minimum RSA key size of 2048 bits.
To generate a 2048-bit RSA private + public key pair for use in RSxxx and PSxxxsignatures:
Elliptic Curve keys
To generate an EC key pair the curve designation must be specified. Note thatJOSE ESxxx signatures require P-256, P-384 and P-521 curves (see theircorresponding OpenSSL identifiers below).
Elliptic Curve private + public key pair for use with ES256 signatures:
Elliptic Curve private + public key pair for use with ES384 signatures:
Elliptic Curve private + public key pair for use with ES512 signatures:
PEM key parsing in Java
The BouncyCastle library provides a simpleutility to parse PEM-encoded keys in Java, to use them for JWS or JWE later.
For Maven you should include the following BouncyCastle dependencies (where1.52 is the latest stable version as of May 2015):
Example parsing of an PEM-encoded EC key in Java: