Having TLS certificate in local file, I can display its details using syntax like:
openssl x509 -text -noout -in cert_filename
Is there any way to display remote SMTP/POP3/HTTP server's TLS certificate in this same format in bash terminal?
How to display server’s TLS certicicate details in terminal
command lineopenssltls
Related Solutions
Since this question has been viewed so much (for me at least) but no answers were submitted, passing on the solution adopted...
NOTE
Some functions, like the multi-interface output functions ifHelpShow() and uiShow() are used but not included here as their calls contain relevant information but their implementations do not.
###############################################################################
# FUNCTIONS (bash 4.1.0)
###############################################################################
function isOption () {
# isOption "$@"
# Return true (0) if argument has 1 or more leading hyphens.
# Example:
# isOption "$@" && ...
# Note:
# Cannot use ifHelpShow() here since cannot distinguish 'isOption --help'
# from 'isOption "$@"' where first argument in "$@" is '--help'
# Revised:
# 20140117 docsalvage
#
# support both short and long options
[[ "${1:0:1}" == "-" ]] && return 0
return 1
}
function optionArg () {
ifHelpShow "$1" 'optionArg --option "$@"
Echo argument to option if any. Within "$@", option and argument may be separated
by space or "=". Quoted strings are preserved. If no argument, nothing echoed.
Return true (0) if option is in argument list, whether an option-argument supplied
or not. Return false (1) if option not in argument list. See also option().
Examples:
FILE=$(optionArg --file "$1")
if $(optionArg -f "$@"); then ...
optionArg --file "$@" && ...
Revised:
20140117 docsalvage' && return
#
# --option to find (without '=argument' if any)
local FINDOPT="$1"; shift
local OPTION=""
local ARG=
local o=
local re="^$FINDOPT="
#
# echo "option start: FINDOPT=$FINDOPT, o=$o, OPTION=$OPTION, ARG=$ARG, @=$@" >&2
#
# let "$@" split commandline, respecting quoted strings
for o in "$@"
do
# echo "FINDOPT=$FINDOPT, o=$o, OPTION=$OPTION, ARG=$ARG" >&2
# echo " o=$o" >&2
# echo "re=$re" >&2
#
# detect --option and handle --option=argument
[[ $o =~ $re ]] && { OPTION=$FINDOPT; ARG="${o/$FINDOPT=/}"; break; }
#
# $OPTION will be non-null if --option was detected in last pass through loop
[[ ! $OPTION ]] && [[ "$o" != $FINDOPT ]] && { continue; } # is a positional arg (no previous --option)
[[ ! $OPTION ]] && [[ "$o" == $FINDOPT ]] && { OPTION="$o"; continue; } # is the arg to last --option
[[ $OPTION ]] && isOption "$o" && { break; } # no more arguments
[[ $OPTION ]] && ! isOption "$o" && { ARG="$o"; break; } # only allow 1 argument
done
#
# echo "option final: FINDOPT=$FINDOPT, o=$o, OPTION=$OPTION, ARG=$ARG, @=$@" >&2
#
# use '-n' to remove any blank lines
echo -n "$ARG"
[[ "$OPTION" == "$FINDOPT" ]] && return 0
return 1
}
###############################################################################
# MAIN (bash 4.1.0) (excerpt of relevant lines)
###############################################################################
# options
[[ "$@" == "" ]] && { zimdialog --help ; exit 0; }
[[ "$1" == "--help" ]] && { zimdialog --help ; exit 0; }
[[ "$1" == "--version" ]] && { uiShow "version $VERSION\n"; exit 0; }
# options with arguments
TITLE="$(optionArg --title "$@")"
TIP="$( optionArg --tip "$@")"
FILE="$( optionArg --file "$@")"
As for command-line spreadsheet programs there are sc and oleo.
See:
Best Answer
openssl s_client -connect server:portdisplay some informations. Maybe is it sufficient for you. It is not exactly the same format, but it can help.