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117 lines
3.4 KiB
Bash
117 lines
3.4 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2019-01-02 21:08:12 +0000 (Wed, 02 Jan 2019)
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#
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# https://github.com/harisekhon/bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/harisekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# used by utils.sh usage()
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# shellcheck disable=SC2034
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usage_description="Runs curl with either Kerberos SpNego (if \$KRB5 is set) or
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a ram file descriptor using \$PASSWORD to avoid credentials being exposed via process list or command line logging
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Requires prefixing url with http:// or https:// to work on older versions of curl in order to parse hostname
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for constructing the authentication string to be specific to the host as using netrc default login doesn't always work
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"
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# shellcheck source=lib/utils.sh
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. "$srcdir/lib/utils.sh"
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# used by utils.sh usage()
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# shellcheck disable=SC2034
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usage_args="[<curl_options>] <url>"
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if [ $# -lt 1 ]; then
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# shellcheck disable=SC2119
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usage
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fi
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for x in "$@"; do
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# shellcheck disable=SC2119
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case "$x" in
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-h|--help) usage
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;;
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esac
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done
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check_bin curl
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USERNAME="${USERNAME:-$USER}"
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# Only do password mechanism and netrc_contents workaround if not using Kerberos
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if [ -z "${KRB5:-${KERBEROS:-}}" ]; then
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if [ -z "${PASSWORD:-}" ]; then
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pass
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fi
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# ==============================================
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# option 1
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# works on Mac but not on Linux, so going back to parsing the hostname and dynamic loading
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# curl 7.64.1 (x86_64-apple-darwin19.0) libcurl/7.64.1 (SecureTransport) LibreSSL/2.8.3 zlib/1.2.11 nghttp2/1.39.2
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# curl 7.35.0 (x86_64-pc-linux-gnu) libcurl/7.35.0 OpenSSL/1.0.1f zlib/1.2.8 libidn/1.28 librtmp/2.3
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if is_curl_min_version 7.64; then
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netrc_contents="default login $USERNAME password $PASSWORD"
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fi
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# ==============================================
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# option 2
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#
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#hosts="$(awk '{print $1}' < ~/.ssh/known_hosts 2>/dev/null | sed 's/,.*//' | sort -u)"
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# use built-in echo if availble, cat is slow with ~1000 .ssh/known_hosts
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#if help echo &>/dev/null; then
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# netrc_contents="$(for host in $hosts; do echo "machine $host login $USERNAME password $PASSWORD"; done)"
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#else
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# # slow fallback with lots of forks
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# netrc_contents="$(for host in $hosts; do cat <<< "machine $host login $USERNAME password $PASSWORD"; done)"
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#fi
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# ==============================================
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# option 3
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# Instead of generating this for all known hosts above just do it for the host extracted from the args url now
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if [ -z "${netrc_contents:-}" ]; then
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if ! [[ "$*" =~ :// ]]; then
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usage "http(s):// not specified in URL"
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fi
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# sed https* - because sed on Mac doesn't respect either ? or \? and otherwise I'd have to use:
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#
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# perl -pe 's/https?:\/\///'
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#
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# or else wrap
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#
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# if is_mac; then
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# sed(){ gsed "$@" }
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# fi
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#
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host="$(grep -Eom 1 'https?://[^:\/[:space:]]+' <<< "$*" | sed 's,https*://,,' | grep -v localhost | head -n1)"
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netrc_contents="machine $host login $USERNAME password $PASSWORD"
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fi
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# ==============================================
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fi
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if [ -n "${KRB5:-${KERBEROS:-}}" ]; then
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command curl -u : --negotiate "$@"
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else
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command curl --netrc-file <(cat <<< "$netrc_contents") "$@"
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fi
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