Expand redaction system to handle uncommon MQSC cases (#304)
* Expand redaction system to handle uncommon MQSC cases * add invalidMQSC fixes * address PR comments
This commit is contained in:
Rob Parker
Arthur Barr
264
internal/mqscredact/mqscredact.go
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264
internal/mqscredact/mqscredact.go
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@@ -0,0 +1,264 @@
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/*
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© Copyright IBM Corporation 2019
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package mqscredact
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import (
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"bufio"
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"io"
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"regexp"
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"strings"
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)
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/* List of sensitive MQ Parameters */
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var sensitiveParameters = []string{"LDAPPWD", "PASSWORD", "SSLCRYP"}
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// redactionString is what sensitive paramters will be replaced with
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const redactionString = "(*********)"
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func findEndOfParamterString(stringDenoter rune, r *bufio.Reader) string {
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parameter := ""
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for {
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char, _, err := r.ReadRune()
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if err != nil {
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return parameter
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}
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parameter = parameter + string(char)
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if char == stringDenoter {
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break
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} else if char == '\n' {
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// Check if we're on a comment line
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NewLineLoop:
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for {
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// Look at next character without moving buffer forwards
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chars, err := r.Peek(1)
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if err != nil {
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return parameter
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}
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// Check if we're at the beginning of some data.
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startOutput, _ := regexp.MatchString(`[^:0-9\s]`, string(chars[0]))
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if startOutput {
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// We are at the start, check if we're on a comment line
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if chars[0] == '*' {
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// found a comment line. go to the next newline chraracter
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CommentLoop:
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for {
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char, _, err = r.ReadRune()
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if err != nil {
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return parameter
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}
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parameter = parameter + string(char)
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if char == '\n' {
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break CommentLoop
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}
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}
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// Go round again as we're now on a new line
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continue NewLineLoop
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}
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// We've checked for comment and it isn't a comment line so break without moving buffer forwards
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break NewLineLoop
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}
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// Move the buffer forward and try again
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char, _, _ = r.ReadRune()
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parameter = parameter + string(char)
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}
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}
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}
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return parameter
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}
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// getParameterString reads from r in order to find the end of the MQSC Parameter value. This is enclosed in ( ).
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// This function will return what it finds and will increment the reader pointer along as it goes.
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func getParameterString(r *bufio.Reader) string {
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// Add the ( in as it will have been dropped before.
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parameter := "("
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Loop:
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for {
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char, _, err := r.ReadRune()
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if err != nil {
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return parameter
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}
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parameter = parameter + string(char)
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switch char {
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case ')':
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break Loop
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// TODO: Duplicate code..
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case '\'', '"':
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parameter = parameter + findEndOfParamterString(char, r)
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}
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}
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return parameter
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}
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func resetAllParameters(currentVerb, originalString *string, lineContinuation, foundGap, parameterNext, redacting, checkComment *bool) {
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*currentVerb = ""
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*originalString = ""
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*lineContinuation = false
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*foundGap = false
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*parameterNext = false
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*redacting = false
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*checkComment = true
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}
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// Redact is the main function for redacting sensitive parameters in MQSC strings
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// It accepts a string and redacts sensitive paramters such as LDAPPWD or PASSWORD
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func Redact(out string) (string, error) {
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out = strings.TrimSpace(out)
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var returnStr, currentVerb, originalString string
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var lineContinuation, foundGap, parameterNext, redacting, checkComment bool
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newline := true
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resetAllParameters(¤tVerb, &originalString, &lineContinuation, &foundGap, ¶meterNext, &redacting, &checkComment)
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r := bufio.NewReader(strings.NewReader(out))
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MainLoop:
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for {
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// We have found a opening ( so use special parameter parsing
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if parameterNext {
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parameterStr := getParameterString(r)
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if !redacting {
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returnStr = returnStr + parameterStr
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} else {
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returnStr = returnStr + redactionString
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}
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resetAllParameters(¤tVerb, &originalString, &lineContinuation, &foundGap, ¶meterNext, &redacting, &checkComment)
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}
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// Loop round getting hte next parameter
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char, _, err := r.ReadRune()
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if err == io.EOF {
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if originalString != "" {
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returnStr = returnStr + originalString
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}
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break
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} else if err != nil {
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return returnStr, err
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}
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/* We need to push forward until we find a non-whitespace, digit or colon character */
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if newline {
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startOutput, _ := regexp.MatchString(`[^:0-9\s]`, string(char))
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if !startOutput {
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originalString = originalString + string(char)
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continue MainLoop
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}
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newline = false
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}
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switch char {
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// Found a line continuation character
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case '+', '-':
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lineContinuation = true
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foundGap = false
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originalString = originalString + string(char)
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continue MainLoop
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// Found whitespace/new line
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case '\n':
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checkComment = true
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newline = true
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fallthrough
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case '\t', '\r', ' ':
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if !lineContinuation {
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foundGap = true
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}
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originalString = originalString + string(char)
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continue MainLoop
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// Found a paramter value
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case '(':
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parameterNext = true
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/* Do not continue as we need to do some checks */
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// Found a comment, parse in a special manner
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case '*':
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if checkComment {
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originalString = originalString + string(char)
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// Loop round until we find the new line character that marks the end of the comment
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CommentLoop:
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for {
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char, _, err := r.ReadRune()
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if err == io.EOF {
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if originalString != "" {
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returnStr = returnStr + originalString
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}
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break MainLoop
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} else if err != nil {
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return returnStr, err
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}
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originalString = originalString + string(char)
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if char == '\n' {
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break CommentLoop
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}
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}
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//Comment has been read and added to original string, go back to start
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checkComment = true
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newline = true
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continue MainLoop
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}
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/* Do not continue as we need to do some checks */
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} //end of switch
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checkComment = false
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if lineContinuation {
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lineContinuation = false
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}
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if foundGap || parameterNext {
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// we've completed an parameter so check whether it is sensitive
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currentVerb = strings.ToUpper(currentVerb)
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if isSensitiveCommand(currentVerb) {
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redacting = true
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}
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// Add the unedited string to the return string
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returnStr = returnStr + originalString
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//reset some of the parameters
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originalString = ""
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currentVerb = ""
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foundGap = false
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lineContinuation = false
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}
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originalString = originalString + string(char)
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currentVerb = currentVerb + string(char)
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}
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return returnStr, nil
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}
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// isSensitiveCommand checks whether the given string contains a sensitive parameter.
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// We use contains here because we can't determine whether a line continuation seperates
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// parts of a parameter or two different parameters.
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func isSensitiveCommand(command string) bool {
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for _, v := range sensitiveParameters {
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if strings.Contains(command, v) {
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return true
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}
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}
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return false
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}
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171
internal/mqscredact/mqscredact_test.go
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171
internal/mqscredact/mqscredact_test.go
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@@ -0,0 +1,171 @@
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/*
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© Copyright IBM Corporation 2019
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package mqscredact
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import (
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"strings"
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"testing"
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)
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const passwordString = passwordHalf1 + passwordHalf2
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const passwordHalf1 = "hippo"
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const passwordHalf2 = "123456"
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var testStrings = [...]string{
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD('" + passwordString + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordString + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD ('" + passwordString + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD\t\t('" + passwordString + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) ldappwd('" + passwordString + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LdApPwD('" + passwordString + "')",
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD('" + passwordString + "')",
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD(\"" + passwordString + "\")",
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD ('" + passwordString + "')",
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD\t\t('" + passwordString + "')",
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) password('" + passwordString + "')",
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) pAsSwOrD('" + passwordString + "')",
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"ALTER QMGR SSLCRYP('" + passwordString + "')",
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"ALTER QMGR SSLCRYP(\"" + passwordString + "\")",
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"ALTER QMGR SSLCRYP ('" + passwordString + "')",
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"ALTER QMGR SSLCRYP\t\t('" + passwordString + "')",
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"ALTER QMGR sslcryp('" + passwordString + "')",
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"ALTER QMGR sslCRYP('" + passwordString + "')",
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// Line continuation ones
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "+\n " + passwordHalf2 + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "+\n\t" + passwordHalf2 + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "+\n\t " + passwordHalf2 + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD('" + passwordHalf1 + "+\n " + passwordHalf2 + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD('" + passwordHalf1 + "+\n\t" + passwordHalf2 + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD('" + passwordHalf1 + "+\n\t " + passwordHalf2 + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "-\n" + passwordHalf2 + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD('" + passwordHalf1 + "-\n" + passwordHalf2 + "')",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "+ \n " + passwordHalf2 + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "+\t\n " + passwordHalf2 + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "- \n" + passwordHalf2 + "\")",
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD(\"" + passwordHalf1 + "-\t\n" + passwordHalf2 + "\")",
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD(\"" + passwordHalf1 + "+\n " + passwordHalf2 + "\")",
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"ALTER QMGR SSLCRYP(\"" + passwordHalf1 + "+\n " + passwordHalf2 + "\")",
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//edge cases
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"ALTER QMGR SSLCRYP(\"" + passwordHalf1 + "+\n 123+\n 456\")",
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"ALTER QMGR SSLCRYP(\"" + passwordHalf1 + "-\n123-\n456\")",
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"ALTER QMGR SSLCRYP(\"" + passwordHalf1 + "+\n 1+\n 2+\n 3+\n 4+\n 5+\n 6\")",
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"ALTER QMGR SSLCRYP(\"" + passwordHalf1 + "-\n1-\n2-\n3-\n4-\n5-\n6\")",
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"ALTER QMGR SSLCRYP + \n (\"" + passwordHalf1 + "+\n 1+\n 2+\n 3+\n 4+\n 5+\n 6\")",
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"ALTER QMGR SSLCRYP - \n(\"" + passwordHalf1 + "-\n1-\n2-\n3-\n4-\n5-\n6\")",
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"ALTER QMGR SSL + \n CRYP(\"" + passwordHalf1 + "+\n 1+\n 2+\n 3+\n 4+\n 5+\n 6\")",
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"ALTER QMGR SSL - \nCRYP(\"" + passwordHalf1 + "-\n1-\n2-\n3-\n4-\n5-\n6\")",
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"ALTER QMGR + \n SSL +\n CRYP(\"" + passwordHalf1 + "+\n 1+\n 2+\n 3+\n 4+\n 5+\n 6\") +\n TEST(1234)",
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"ALTER QMGR -\nSSL -\nCRYP(\"" + passwordHalf1 + "-\n1-\n2-\n3-\n4-\n5-\n6\") -\nTEST(1234)",
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"ALTER QMGR +\n * COMMENT\n SSL +\n * COMMENT IN MIDDLE\n CRYP('" + passwordString + "')",
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" 1: ALTER CHANNEL(TEST2) CHLTYPE(SDR) PASS+\n : *test comment\n : WORD('" + passwordString + "')",
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" 2: ALTER CHANNEL(TEST3) CHLTYPE(SDR) PASSWORD('" + passwordHalf1 + "-\n*commentinmiddle with ' \n" + passwordHalf2 + "')",
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" 3: ALTER CHANNEL(TEST3) CHLTYPE(SDR) PASSWORD('" + passwordHalf1 + "-\n*commentinmiddle with ') \n" + passwordHalf2 + "')",
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}
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var expected = [...]string{
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD " + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD\t\t" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) ldappwd" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LdApPwD" + redactionString,
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD" + redactionString,
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD" + redactionString,
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD " + redactionString,
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD\t\t" + redactionString,
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) password" + redactionString,
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) pAsSwOrD" + redactionString,
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"ALTER QMGR SSLCRYP" + redactionString,
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"ALTER QMGR SSLCRYP" + redactionString,
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"ALTER QMGR SSLCRYP " + redactionString,
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"ALTER QMGR SSLCRYP\t\t" + redactionString,
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"ALTER QMGR sslcryp" + redactionString,
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"ALTER QMGR sslCRYP" + redactionString,
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// Line continuation ones
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
|
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
|
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"DEFINE AUTHINFO(TEST) AUTHTYPE(IDPWLDAP) LDAPPWD" + redactionString,
|
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|
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"DEFINE CHANNEL(CHL) CHLTYPE(SOMETHING) PASSWORD" + redactionString,
|
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|
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"ALTER QMGR SSLCRYP" + redactionString,
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|
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//edge cases
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"ALTER QMGR SSLCRYP" + redactionString,
|
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"ALTER QMGR SSLCRYP" + redactionString,
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|
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"ALTER QMGR SSLCRYP" + redactionString,
|
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"ALTER QMGR SSLCRYP" + redactionString,
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"ALTER QMGR SSLCRYP + \n \t " + redactionString,
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"ALTER QMGR SSLCRYP - \n " + redactionString,
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|
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"ALTER QMGR SSL + \n CRYP" + redactionString,
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"ALTER QMGR SSL - \nCRYP" + redactionString,
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"ALTER QMGR + \n SSL +\n CRYP" + redactionString + " +\n TEST(1234)",
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"ALTER QMGR -\nSSL -\nCRYP" + redactionString + " -\nTEST(1234)",
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"ALTER QMGR +\n * COMMENT\n SSL +\n * COMMENT IN MIDDLE\n CRYP" + redactionString,
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"1: ALTER CHANNEL(TEST2) CHLTYPE(SDR) PASS+\n : *test comment\n : WORD" + redactionString,
|
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"2: ALTER CHANNEL(TEST3) CHLTYPE(SDR) PASSWORD" + redactionString,
|
||||
"3: ALTER CHANNEL(TEST3) CHLTYPE(SDR) PASSWORD" + redactionString,
|
||||
}
|
||||
|
||||
// Returns true if the 2 strings are equal ignoring whitespace characters
|
||||
func compareIgnoreWhiteSpace(str1, str2 string) bool {
|
||||
whiteSpaces := [...]string{" ", "\t", "\n", "\r"}
|
||||
for _, w := range whiteSpaces {
|
||||
str1 = strings.Replace(str1, w, "", -1)
|
||||
str2 = strings.Replace(str2, w, "", -1)
|
||||
}
|
||||
|
||||
return str1 == str2
|
||||
}
|
||||
|
||||
func TestAll(t *testing.T) {
|
||||
for i, v := range testStrings {
|
||||
back, _ := Redact(v)
|
||||
if strings.Contains(back, passwordHalf1) || strings.Contains(back, passwordHalf2) || strings.Contains(back, passwordString) {
|
||||
t.Errorf("MAJOR FAIL[%d]: Found an instance of the password. ", i)
|
||||
}
|
||||
|
||||
if !compareIgnoreWhiteSpace(back, expected[i]) {
|
||||
t.Errorf("FAIL[%d]:\nGave :%s\nexpected:%s\ngot :%s", i, v, expected[i], back)
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user