Jan 15, 2015 Tag: Security

Looking for Wisdom about Cryptography

Ongoing attempt to collect links and information about cryptography. Will be updated as needed.

Updated on Jul 09, 2015

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Openssl

Openssl faq

Key manipulation

Links: remove passphrase, add or remove passphrase

Add or remove passphrase:

~/.ssh$  openssl rsa -text      -in id_rsa -noout               # test for passphrase
~/.ssh$  openssl rsa       -des -in id_rsa -out id_rsa_changed  # change   passphrase
~/.ssh$  openssl rsa            -in id_rsa -out id_rsa_changed  # remove   passphrase

Commands

Key agent:

$  ssh-agent bash
$  ssh-add ~/.ssh/id-rsa
$  ssh-add -l  # list
$  ssh-add -d  # remove

Transfer and install pubkey:

$  ssh-copy-id -i ~/.ssh/id_rsa  user@target.tld  # enter PW once!
$  ssh-copy-id                   user@target.tld  # enter PW once!

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