Using openssl to get the certificate from a server
I am trying to get the certificate of a remote server, which I can then use to add to my keystore and use within my Java application. A senior dev (who is on holidays :( ) informed me I can run this: openssl s_client -connect host.host:9999 to get a raw certificate dumped out, which I can then copy and export. I receive the following output: depth=1 /C=NZ/ST=Test State or Province/O=Organization N
openssl to negotiate SSL encryption for STARTTLS
I'm using openssl to connect to an SMTP server normally (without encryption), send a STARTTLS command, negotiate the SSL encryption, and then interact with the encrypted session. This is the command I'm using (through telnet): openssl s_client -starttls smtp -crlf -connect 1.2.3.4:25 How can I ensure that TLS handshake was successful? This is the sequence of commands used so far: << 220 example.co
OpenSSL Command-Line HOWTO
OpenSSL Command-Line HOWTO Paul Heinlein First published on June 13, 2004 Last updated on May 3, 2024 Introduction The openssl command-line binary that ships with the OpenSSL libraries can perform a wide range of cryptographic operations. It can come in handy in scripts or for accomplishing one-time command-line tasks. Documentation for using the openssl application is somewhat scattered, however,
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How to convert .crt to .pem
How to get .pem file from .key and .crt files?