62 lines
2.0 KiB
Bash
Executable File
62 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
# Set Content-Type for CGI script
|
|
echo "Content-type: application/json"
|
|
echo ""
|
|
|
|
# Read POST data
|
|
read -r POST_DATA
|
|
|
|
# Extract the password from POST data (URL encoded)
|
|
USER="root"
|
|
INPUT_PASSWORD=$(echo "$POST_DATA" | grep -o 'password=[^&]*' | cut -d= -f2-)
|
|
RESPONSE=""
|
|
HOST_DIR=$(pwd)
|
|
|
|
# URL-decode the password while preserving most special characters
|
|
# First decode percent-encoded sequences
|
|
urldecode() {
|
|
local encoded="${1//+/ }"
|
|
printf '%b' "${encoded//%/\\x}"
|
|
}
|
|
|
|
# Decode the password
|
|
INPUT_PASSWORD=$(urldecode "$INPUT_PASSWORD")
|
|
|
|
# Basic validation to reject & and $ characters
|
|
if echo "$INPUT_PASSWORD" | grep -q '[&$]'; then
|
|
echo '{"state":"failed", "message":"Password contains forbidden characters (& or $)"}'
|
|
exit 1
|
|
fi
|
|
|
|
# Sanitize the password for shell usage
|
|
INPUT_PASSWORD=$(printf '%s' "$INPUT_PASSWORD" | sed 's/[\"]/\\&/g')
|
|
|
|
# Extract the hashed password from /etc/shadow for the specified user
|
|
USER_SHADOW_ENTRY=$(grep "^$USER:" /etc/shadow)
|
|
|
|
if [ -z "$USER_SHADOW_ENTRY" ]; then
|
|
echo '{"state":"failed", "message":"User not found"}'
|
|
exit 1
|
|
fi
|
|
|
|
# Extract the password hash (it's the second field, colon-separated)
|
|
USER_HASH=$(echo "$USER_SHADOW_ENTRY" | cut -d: -f2)
|
|
|
|
# Extract the salt (MD5 uses the $1$ prefix followed by the salt)
|
|
SALT=$(echo "$USER_HASH" | cut -d'$' -f3)
|
|
|
|
# Generate a hash from the input password using the same salt
|
|
# Use printf to avoid issues with special characters in echo
|
|
GENERATED_HASH=$(printf '%s' "$INPUT_PASSWORD" | openssl passwd -1 -salt "$SALT" -stdin)
|
|
|
|
# Check if the request for AUTH contains the Authorization Header so as to assure we're not at an initial login
|
|
SUPPLIED_TOKEN="${HTTP_AUTHORIZATION}"
|
|
# Compare the generated hash with the one in the shadow file
|
|
if [ "$GENERATED_HASH" = "$USER_HASH" ]; then
|
|
RESPONSE=$(/bin/sh ${HOST_DIR}/cgi-bin/quecmanager/auth-token.sh process "$SUPPLIED_TOKEN")
|
|
else
|
|
RESPONSE=$(/bin/sh ${HOST_DIR}/cgi-bin/quecmanager/auth-token.sh removeToken "$SUPPLIED_TOKEN")
|
|
fi
|
|
|
|
echo "$RESPONSE" |