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#!/bin/bash
# Copyright (c) 2010, 2012 Yu-Jie Lin
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is furnished to do
# so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
BASHOAUTH_VERSION=0.1.2
OAuth_debug () {
# Print out all parameters, each in own line
[[ "$OAUTH_DEBUG" == "" ]] && return
local t=$(date +%FT%T.%N)
while (( $# > 0 )); do
echo "[OAuth][DEBUG][$t] $1"
shift 1
done
}
OAuth_nonce () {
# Return a nonce
md5sum <<< "$RANDOM-$(date +%s.%N)" | cut -d' ' -f 1
}
OAuth_timestamp () {
# Return timestamp
echo "$(date +%s)"
}
OAuth_PE () {
# Encode $1 using Percent-encoding as defined in
# http://tools.ietf.org/html/rfc5849#section-3.6
# Any character other than [a-zA-Z0-9-._~] is converted into format %XX
[ -n "$1" ] \
&& echo -n "$1" | perl -p -e 's/([^A-Za-z0-9-._~])/sprintf("%%%02X", ord($1))/seg'
}
OAuth_PE_file () {
# Encode a file $1 using Percent-encoding as defined in
# http://tools.ietf.org/html/rfc5849#section-3.6
# $1 a filename, not the content of file
perl -p -e 's/([^A-Za-z0-9-._~])/sprintf("%%%02X", ord($1))/seg' < "$1"
}
OAuth_params_string () {
# Sort the paramters and join them into one-line string
while (( $# > 0 )); do
echo $1
shift 1
done | sort | tr '\n' '&' | sed 's/&$//'
}
OAuth_base_string () {
# $1 method: "GET", "POST", etc
# $2 url
# $3-$N params
local method=$1
local url=$2
shift 2
local params_string=$(OAuth_params_string $@)
echo "$method&$(OAuth_PE "$url")&$(OAuth_PE "$params_string")"
}
OAuth_param () {
# Return a percent encoded key-value pair
# $1 key
# $2 value
echo "$(OAuth_PE "$1")=$(OAuth_PE "$2")"
}
OAuth_param_quote () {
# Return a percent encoded key-value pair, value is quoted
# $1 key
# $2 value
echo "$(OAuth_PE "$1")=\"$(OAuth_PE "$2")\""
}
OAuth_param_file () {
# Return a percent encoded key-value pair, the value is an encoded file content
# $1 key
# $2 filename
echo "$(OAuth_PE "$1")=$(OAuth_PE_file "$2")"
}
OAuth_param_raw_value () {
# Return a percent encoded key-value pair, only key will be encoded by this function
# $1 key
# $2 value
echo "$(OAuth_PE "$1")=$2"
}
OAuth_HMAC_SHA1 () {
# Hash the text $1 with key $2
local text="$1"
local key="$2"
echo -n "$text" | openssl dgst -sha1 -binary -hmac "$key" | base64
}
_OAuth_signature () {
# Return the signature, note it's necessary to pass to OAuth_PE before add to header
# $1 signature_method
# $2 base_string
# $3 consumer_secret
# $4 token_secret
local signature_method="OAuth_${1//-/_}"
local base_string=$2
local c_secret=$3
local t_secret=$4
$signature_method "$base_string" "$c_secret&$t_secret"
}
OAuth_signature () {
# Return the signature, note it's necessary to pass to OAuth_PE before add to header
# $1 base_string
_OAuth_signature "$oauth_signature_method" "$1" "$oauth_consumer_secret" "$oauth_token_secret"
}
_OAuth_authorization_header_params_string () {
while (( $# > 0 )); do
echo -n "$(cut -d\= -f 1 <<< "$1")=\"$(cut -d\= -f 2 <<< "$1")\""
shift 1
# Use break to prevent error code being returned
(( $# > 0 )) && echo -n ', ' || break
done
}
_OAuth_authorization_header () {
# Return header string
# $1 header key
# $2 OAuth realm, can be empty string
# $3 OAuth consumer key
# $4 OAuth consumer secret
# $5 OAuth token
# $6 OAuth token secret
# $7 OAuth signature method
# $8 OAuth version
# $9 nonce
# $10 timestamp
# $11 method
# $12 url
# $13-$N params
echo -n "$1: OAuth "
[[ "$2" != "" ]] && echo -n "realm=\"$2\", "
local oauth_consumer_key="$3"
local oauth_consumer_secret="$4"
local oauth_token="$5"
local oauth_token_secret="$6"
local oauth_signature_method="$7"
local oauth_version="$8"
local oauth_nonce="$9"
[[ "$oauth_nonce" == "" ]] && oauth_nonce="$(OAuth_nonce)"
local oauth_timestamp="${10}"
[[ "$oauth_timestamp" == "" ]] && oauth_timestamp="$(OAuth_timestamp)"
local method="${11}"
local url="${12}"
shift 12
local params=(
$(OAuth_param 'oauth_consumer_key' "$oauth_consumer_key")
$(OAuth_param 'oauth_signature_method' "$oauth_signature_method")
$(OAuth_param 'oauth_version' "$oauth_version")
$(OAuth_param 'oauth_nonce' "$oauth_nonce")
$(OAuth_param 'oauth_timestamp' "$oauth_timestamp")
)
[[ "$oauth_token" != "" ]] && params[${#params[@]}]=$(OAuth_param 'oauth_token' "$oauth_token")
local sign_params=${params[@]}
while (( $# > 0 )); do
sign_params[${#sign_params[@]}]="$1"
shift 1
done
local base_string=$(OAuth_base_string "$method" "$url" ${sign_params[@]})
local signature=$(_OAuth_signature "$oauth_signature_method" "$base_string" "$oauth_consumer_secret" "$oauth_token_secret")
params[${#params[@]}]=$(OAuth_param 'oauth_signature' "$signature")
_OAuth_authorization_header_params_string ${params[@]}
}
OAuth_authorization_header () {
# Return header string
# $1 header key
# $2 OAuth realm, can be empty string
# $3 OAuth nonce
# $4 OAuth timestamp
# $5 method
# $6 url
# $7-$N params
local header_key="$1"
local realm="$2"
local oauth_nonce="$3"
local oauth_timestamp="$4"
local method="$5"
local url="$6"
shift 6
local params=()
while (( $# > 0 )); do
params[${#params[@]}]="$1"
shift 1
done
_OAuth_authorization_header "$header_key" "$realm" "$oauth_consumer_key" "$oauth_consumer_secret" "$oauth_token" "$oauth_token_secret" "$oauth_signature_method" "$oauth_version" "$oauth_nonce" "$oauth_timestamp" "$method" "$url" ${params[@]}
}
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