So I already know how to specify locations for trusted certificates using SSL_CTX_load_verify_locations(). Now the documentation says the following: SSL_CTX_load_verify_locations() specifies the locations for ctx, at which CA certificates for verification purposes are located. The certificates available via C…
Tag: openssl
Script to generate MD5 hash with openssl
I’m trying to generate some MD5 hashes with openssl for use with chpasswd Ex. CSV file: Script I created: However, if I take any MD5 generated from this script and try to use it with chpasswd it does not work. This password will fail If I try to do this without the script by hand it works: Answer Your C…
How can I split a CA certificate bundle into separate files?
I’m working with OpenSSL and need a sane default list of CAs. I’m using Mozilla’s list of trusted CAs, as bundled by cURL. However, I need to split this bundle of CA certs, because the OpenSSL documentation says: If CApath is not NULL, it points to a directory containing CA certificates in P…
How to send a string to server using s_client
How to use s_client of openssl to send a short string to the server? I have read the s_client manual but didn’t find any usable flags. Or is there any other ways to achieve this? Answer Does anyone know how to use s_client of openssl to send a short string to the server? You can echo it in. Below, I
How to upgrade OpenSSL in CentOS 6.5 / Linux / Unix from source?
How do I upgrade OpenSSL in CentOS 6.5? I have used these commands, but nothings happens: After using this command, I get the old version Answer Try this config line instead to overwrite the default. It installs to prefix /usr/local/ssl by default in your setup when you leave off the prefix. You probably have…
Kernel Modul and SSL
at the moment I am working on the kernel module of ccn-lite (http://www.ccn-lite.net/). For that I need some security functionality (sha1 and public/private key authentificaton). For the user-space I use the openssl library, but I cannot use a library in the kernel module. It is also hard to pick the function…