Mercurial > cgi-bin > hgweb.cgi > PassMan

annotate src/main/kotlin/name/blackcap/passman/UpdateSubcommand.kt @ 8:698c4a3d758d

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Some code clean-up.
author David Barts <n5jrn@me.com>
date Fri, 23 Sep 2022 20:59:52 -0700
parents 711cc42e96d7
children 72619175004e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 package name.blackcap.passman
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2
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3 import org.apache.commons.cli.*
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4 import java.sql.Types
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5 import java.util.*
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6 import kotlin.properties.Delegates
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7 import kotlin.system.exitProcess
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8
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9 class UpdateSubcommand(): Subcommand() {
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10 private lateinit var commandLine: CommandLine
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11 private lateinit var db: Database
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12 private lateinit var nameIn: String
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13 private var id by Delegates.notNull<Long>()
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14 private var length by Delegates.notNull<Int>()
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15 private val fields = StringBuilder()
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16 private val fieldValues = mutableListOf<Any?>()
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17
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18 private companion object {
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19 const val GENERATE = "generate"
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20 const val HELP = "help"
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21 const val LENGTH = "length"
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22 const val SYMBOLS = "symbols"
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23 const val VERBOSE = "verbose"
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24 const val NULL_SPECIFIED = "."
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25 val NULLABLE_FIELDS = setOf<String>("notes")
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26 val SENSITIVE_FIELDS = setOf<String>("password")
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27 }
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28
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29 override fun run(args: Array<String>) {
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30 parseArguments(args)
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31 checkDatabase()
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32 try {
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33 update()
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34 } finally {
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35 cleanUp()
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36 }
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37 }
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38
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39 private fun parseArguments(args: Array<String>) {
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40 val options = Options().apply {
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41 addOption("g", GENERATE, false, "Use password generator.")
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42 addOption("h", HELP, false, "Print this help message.")
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43 addOption("l", LENGTH, true, "Length of generated password.")
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44 addOption("s", SYMBOLS, false, "Use symbol characters in generated password.")
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45 addOption("v", VERBOSE, false, "Print the generated password.")
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46 }
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47 try {
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48 commandLine = DefaultParser().parse(options, args)
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49 } catch (e: ParseException) {
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50 die(e.message ?: "syntax error", 2)
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51 }
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52 if (commandLine.hasOption(HELP)) {
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53 HelpFormatter().printHelp("$SHORTNAME update", options)
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54 exitProcess(0)
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55 }
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56 checkArguments()
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57 db = Database.open()
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58 nameIn = commandLine.args[0]
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59 id = db.makeKey(nameIn)
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60 length = commandLine.getOptionValue(LENGTH)?.let { rawLength ->
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61 try {
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62 rawLength.toInt()
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63 } catch (e: NumberFormatException) {
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64 die("${see(rawLength)} - invalid length")
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65 -1 /* will never happen */
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66 }
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67 } ?: DEFAULT_GENERATED_LENGTH
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68 }
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69
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70 private fun checkArguments(): Unit {
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71 var bad = false
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72 if (!commandLine.hasOption(GENERATE)) {
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73 for (option in listOf<String>(LENGTH, SYMBOLS, VERBOSE)) {
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74 if (commandLine.hasOption(option)) {
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75 error("--$option requires --$GENERATE")
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76 bad = true
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77 }
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78 }
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79 }
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80 if (commandLine.args.isEmpty()) {
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81 error("expecting site name")
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82 }
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83 if (commandLine.args.size > 1) {
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84 error("unexpected trailing arguments")
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85 }
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86 if (bad) {
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87 exitProcess(2);
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88 }
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89 }
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90
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91 private fun checkDatabase(): Unit {
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92 db.connection.prepareStatement("select count(*) from passwords where id = ?").use {
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93 it.setLong(1, id)
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94 val result = it.executeQuery()
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95 result.next()
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96 val count = result.getInt(1)
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97 if (count < 1) {
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98 die("no record matches " + see(nameIn))
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99 }
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100 }
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101 }
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102
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103 private fun update(): Unit {
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104 updateOne("username")
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105 if (commandLine.hasOption(GENERATE)) {
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106 generatePassword()
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107 } else {
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108 updateOne("password")
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109 }
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110 updateOne("notes")
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111 if (fieldValues.isEmpty()) {
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112 error("no values changed")
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113 return
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114 }
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115
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116 db.connection.prepareStatement("update passwords set modified = ?, $fields where id = ?").use { stmt ->
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117 stmt.setLong(1, System.currentTimeMillis())
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118 fieldValues.indices.forEach { fieldIndex ->
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119 val fieldValue = fieldValues[fieldIndex]
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120 val columnIndex = fieldIndex + 2
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121 when (fieldValue) {
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122 is String -> stmt.setEncryptedString(columnIndex, fieldValue, db.encryption)
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123 is CharArray -> stmt.setEncrypted(columnIndex, fieldValue, db.encryption)
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124 null -> stmt.setNull(columnIndex, Types.BLOB)
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125 else -> throw RuntimeException("this shouldn't happen")
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126 }
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127 }
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128 stmt.setLong(fieldValues.size + 2, id)
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129 stmt.execute()
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130 }
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131 }
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132
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133 private fun cleanUp(): Unit {
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134 fieldValues.forEach { if (it is CharArray) { it.clear() } }
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135 }
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136
0
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137 private fun updateOne(name: String): Unit {
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138 val prompt = name.replaceFirstChar { it.titlecase(Locale.getDefault()) } + ": "
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139 val value: Any? = if (name in SENSITIVE_FIELDS) {
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140 getPassword(prompt, verify = true)
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141 } else {
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142 val rawValue = readLine(prompt)
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143 if (name in NULLABLE_FIELDS && rawValue == NULL_SPECIFIED) {
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144 null
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145 } else {
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146 rawValue
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147 }
0
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148 }
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149
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150 val noChange = when (value) {
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151 is String -> value.isEmpty()
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152 is CharArray -> value.isEmpty()
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153 else -> false
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154 }
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155 if (noChange) {
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156 return
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157 }
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158
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159 addOne(name, value)
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160 }
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161
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162 private fun addOne(name: String, value: Any?) {
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163 if (fields.isNotEmpty()) {
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164 fields.append(", ")
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165 }
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166 fields.append(name)
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167 fields.append(" = ?")
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168 fieldValues.add(value)
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169 }
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170
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171 private fun generatePassword(): Unit {
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172 val newPassword = generate(length, commandLine.hasOption(SYMBOLS))
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173 if (commandLine.hasOption(VERBOSE)) {
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174 printPassword(newPassword)
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175 }
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176 addOne("password", newPassword)
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177 }
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178
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179 }