telnet.sh

#!/bin/bash

# a telnet-like command to debug text protocols over SSL (https, smtps...).

# usage:
# telnets example.com https
# telnets example.com:https
# telnets https://example.com

if echo "$1" | grep -q "^[a-z]*://"; then
  host="$(echo $1 | sed -e "s,^\([a-z]*\)://\(.*\),\2,")"
  port="$(echo $1 | sed -e "s,^\([a-z]*\)://\(.*\),\1,")"
elif echo "$1" | grep -q :; then
  host="$(echo $1 | sed -e "s,\([^:]*\):\(.*\),\1,")"
  port="$(echo $1 | sed -e "s,\([^:]*\):\(.*\),\2,")"
else
  host="$1"
  port="$2"
fi

openssl s_client -quiet -connect "$host":"$port"

telnets_snippet.sh

function telnets()
{
  # a telnet-like command to debug text protocols over SSL (https, smtps...).
  # implemented as function cause I put it in my .bashrc .

  # usage:
  # telnets example.com https
  # telnets example.com:https
  # telnets https://example.com

  local host port
  if echo "$1" | grep -q "^[a-z]*://"; then
    host="$(echo $1 | sed -e "s,^\([a-z]*\)://\(.*\),\2,")"
    port="$(echo $1 | sed -e "s,^\([a-z]*\)://\(.*\),\1,")"
  elif echo "$1" | grep -q :; then
    host="$(echo $1 | sed -e "s,\([^:]*\):\(.*\),\1,")"
    port="$(echo $1 | sed -e "s,\([^:]*\):\(.*\),\2,")"
  else
    host="$1"
    port="$2"
  fi

  openssl s_client -quiet -connect "$host":"$port"
}