Mercurial > gemma
annotate pkg/controllers/pwreset.go @ 2685:39a05f8c34e6 import-overview-rework
import_overview: Refactoring of detailed information.
When the entry is opened, a request is made to retrieve the
detailed information for this entry. It contains the log
protocol information as well as the executive summary.
This is passed down to child components of the entry.
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Fri, 15 Mar 2019 13:42:49 +0100 |
parents | cabf4789e02b |
children | ed4820efb7e6 |
rev | line source |
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1017
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1 // This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 // without warranty, see README.md and license for details. |
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3 // |
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4 // SPDX-License-Identifier: AGPL-3.0-or-later |
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5 // License-Filename: LICENSES/AGPL-3.0.txt |
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6 // |
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7 // Copyright (C) 2018 by via donau |
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 // Software engineering by Intevation GmbH |
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10 // |
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11 // Author(s): |
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 // * Bernhard E. Reiter <bernhard.reiter@intevation.de> |
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14 // * Tom Gottfried <tom.gottfried.intevation.de> |
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15 |
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16 package controllers |
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17 |
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18 import ( |
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19 "bytes" |
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20 "context" |
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21 "database/sql" |
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22 "encoding/hex" |
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23 "errors" |
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24 "log" |
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25 "net/http" |
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26 "os/exec" |
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27 "strconv" |
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28 "strings" |
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29 "text/template" |
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30 "time" |
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31 |
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32 "github.com/gorilla/mux" |
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33 |
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34 "gemma.intevation.de/gemma/pkg/auth" |
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35 "gemma.intevation.de/gemma/pkg/common" |
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36 "gemma.intevation.de/gemma/pkg/config" |
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37 "gemma.intevation.de/gemma/pkg/misc" |
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38 "gemma.intevation.de/gemma/pkg/models" |
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39 ) |
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40 |
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41 const ( |
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42 insertRequestSQL = `INSERT INTO sys_admin.password_reset_requests |
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43 (hash, username) VALUES ($1, $2)` |
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44 |
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45 countRequestsSQL = `SELECT count(*) FROM sys_admin.password_reset_requests` |
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46 |
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47 countRequestsUserSQL = `SELECT count(*) FROM sys_admin.password_reset_requests |
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48 WHERE username = $1` |
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49 |
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50 deleteRequestSQL = `DELETE FROM sys_admin.password_reset_requests |
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51 WHERE hash = $1` |
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52 |
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53 findRequestSQL = `SELECT lu.email_address, lu.username |
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54 FROM sys_admin.password_reset_requests prr |
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55 JOIN users.list_users lu on prr.username = lu.username |
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56 WHERE prr.hash = $1` |
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57 |
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58 cleanupRequestsSQL = `DELETE FROM sys_admin.password_reset_requests |
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59 WHERE issued < $1` |
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60 |
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61 userExistsSQL = `SELECT email_address |
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62 FROM users.list_users WHERE username = $1` |
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63 |
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64 updatePasswordSQL = `UPDATE users.list_users |
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65 SET pw = $1 WHERE username = $2` |
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66 ) |
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67 |
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68 const ( |
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69 hashLength = 16 |
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70 passwordLength = 20 |
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71 passwordResetValid = 12 * time.Hour |
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72 maxPasswordResets = 1000 |
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73 maxPasswordRequestsPerUser = 5 |
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74 cleanupPause = 15 * time.Minute |
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75 ) |
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76 |
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77 const pwResetRole = "sys_admin" |
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78 |
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79 var ( |
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80 errTooMuchPasswordResets = errors.New("Too many password resets") |
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81 errTooMuchPasswordResetsPerUser = errors.New("Too many password resets per user") |
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82 errNoSuchUser = errors.New("User does not exist") |
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83 errInvalidUser = errors.New("Invalid user") |
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84 ) |
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85 |
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86 var ( |
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87 passwordResetRequestMailTmpl = template.Must( |
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88 template.New("request").Parse(`You or someone else has requested a password change |
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89 for your account {{ .User }} on |
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90 {{ .HTTPS }}://{{ .Server }} |
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91 |
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92 Please follow this link to have a new password generated and mailed to you: |
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93 |
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94 {{ .HTTPS }}://{{ .Server }}/api/users/passwordreset/{{ .Hash }} |
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95 |
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96 The link is only valid for 12 hours. |
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97 |
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98 If you did not initiate this password reset or do not want to reset the |
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99 password, just ignore this email. |
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100 |
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101 Best regards |
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102 Your service team`)) |
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103 |
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104 passwordResetMailTmpl = template.Must( |
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105 template.New("reset").Parse(`Your password for your account {{ .User }} on |
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106 {{ .HTTPS }}://{{ .Server }} |
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107 |
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108 has been changed to |
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109 {{ .Password }} |
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110 |
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111 Change it as soon as possible. |
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112 |
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113 Best regards |
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114 Your service team`)) |
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115 ) |
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116 |
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117 func init() { |
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118 go removeOutdated() |
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119 } |
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120 |
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121 func removeOutdated() { |
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122 config.WaitReady() |
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123 for { |
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124 time.Sleep(cleanupPause) |
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125 ctx := context.Background() |
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126 err := auth.RunAs( |
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127 ctx, pwResetRole, |
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128 func(conn *sql.Conn) error { |
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129 good := time.Now().Add(-passwordResetValid) |
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130 _, err := conn.ExecContext( |
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131 ctx, cleanupRequestsSQL, good) |
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132 return err |
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133 }) |
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134 if err != nil { |
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135 log.Printf("error: %v\n", err) |
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136 } |
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137 } |
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138 } |
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139 |
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140 func requestMessageBody(https, user, hash, server string) string { |
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141 var content = struct { |
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142 User string |
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143 HTTPS string |
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144 Server string |
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145 Hash string |
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146 }{ |
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147 User: user, |
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148 HTTPS: https, |
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149 Server: server, |
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150 Hash: hash, |
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151 } |
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152 var buf bytes.Buffer |
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153 if err := passwordResetRequestMailTmpl.Execute(&buf, &content); err != nil { |
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154 log.Printf("error: %v\n", err) |
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155 } |
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156 return buf.String() |
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157 } |
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158 |
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159 func changedMessageBody(https, user, password, server string) string { |
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160 var content = struct { |
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161 User string |
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162 HTTPS string |
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163 Server string |
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164 Password string |
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165 }{ |
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166 User: user, |
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167 HTTPS: https, |
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168 Server: server, |
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169 Password: password, |
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170 } |
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171 var buf bytes.Buffer |
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172 if err := passwordResetMailTmpl.Execute(&buf, &content); err != nil { |
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173 log.Printf("error: %v\n", err) |
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174 } |
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175 return buf.String() |
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176 } |
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177 |
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178 func useHTTPS(req *http.Request) string { |
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179 if req.Header.Get("X-Use-Protocol") == "https" || |
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180 req.URL.Scheme == "https" { |
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181 return "https" |
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182 } |
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183 return "http" |
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184 } |
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185 |
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186 func generateHash() string { |
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187 return hex.EncodeToString(common.GenerateRandomKey(hashLength)) |
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188 } |
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189 |
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190 func generateNewPassword() string { |
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191 // First try pwgen |
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192 out, err := exec.Command( |
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193 "pwgen", "-y", strconv.Itoa(passwordLength), "1").Output() |
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194 if err == nil { |
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195 return strings.TrimSpace(string(out)) |
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196 } |
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197 // Use internal generator. |
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198 return common.RandomString(passwordLength) |
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199 } |
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200 |
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201 func backgroundRequest(https, host string, user *models.PWResetUser) error { |
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202 |
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203 if user.User == "" { |
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204 return errInvalidUser |
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205 } |
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206 |
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207 var hash, email string |
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208 |
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209 ctx := context.Background() |
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210 |
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211 if err := auth.RunAs( |
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212 ctx, pwResetRole, |
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213 func(conn *sql.Conn) error { |
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214 |
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215 var count int64 |
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216 if err := conn.QueryRowContext( |
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217 ctx, countRequestsSQL).Scan(&count); err != nil { |
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218 return err |
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219 } |
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220 |
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221 // Limit total number of password requests. |
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222 if count >= maxPasswordResets { |
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223 return errTooMuchPasswordResets |
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224 } |
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225 |
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226 err := conn.QueryRowContext(ctx, userExistsSQL, user.User).Scan(&email) |
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227 |
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228 switch { |
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229 case err == sql.ErrNoRows: |
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230 return errNoSuchUser |
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231 case err != nil: |
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232 return err |
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233 } |
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234 |
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235 if err := conn.QueryRowContext( |
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236 ctx, countRequestsUserSQL, user.User).Scan(&count); err != nil { |
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237 return err |
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238 } |
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239 |
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240 // Limit requests per user |
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241 if count >= maxPasswordRequestsPerUser { |
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242 return errTooMuchPasswordResetsPerUser |
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243 } |
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244 |
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245 hash = generateHash() |
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246 _, err = conn.ExecContext(ctx, insertRequestSQL, hash, user.User) |
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247 return err |
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248 }, |
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249 ); err != nil { |
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250 return err |
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251 } |
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252 |
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253 body := requestMessageBody(https, user.User, hash, host) |
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254 |
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255 return misc.SendMail(email, "Password Reset Link", body) |
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256 } |
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257 |
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258 // host checks if we are behind a proxy and returns the name |
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259 // of the up-front server. |
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260 func host(req *http.Request) string { |
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261 if fwd := req.Header.Get("X-Forwarded-Host"); fwd != "" { |
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262 return fwd |
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263 } |
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264 return req.Host |
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265 } |
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266 |
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267 func passwordResetRequest( |
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268 input interface{}, |
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269 req *http.Request, |
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270 _ *sql.Conn, |
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271 ) (jr JSONResult, err error) { |
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272 |
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273 // We do the checks and the emailing in background |
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274 // no reduce the risks of timing attacks. |
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275 go func(https, host string, user *models.PWResetUser) { |
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276 if err := backgroundRequest(https, host, user); err != nil { |
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277 log.Printf("error: %v\n", err) |
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278 } |
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279 }(useHTTPS(req), host(req), input.(*models.PWResetUser)) |
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280 |
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281 // Send a neutral message to avoid being an user oracle. |
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282 const neutralMessage = "If this account exists, a reset link will be mailed." |
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283 |
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284 jr.Result = &struct { |
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285 Message string `json:"message"` |
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286 }{neutralMessage} |
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287 |
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288 return |
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289 } |
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290 |
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291 func passwordReset( |
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292 _ interface{}, |
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293 req *http.Request, |
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294 _ *sql.Conn, |
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295 ) (jr JSONResult, err error) { |
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296 |
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297 hash := mux.Vars(req)["hash"] |
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298 if _, err = hex.DecodeString(hash); err != nil { |
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299 err = JSONError{http.StatusBadRequest, "Invalid hash"} |
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300 return |
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301 } |
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302 |
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303 var email, user, password string |
310
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304 |
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305 ctx := req.Context() |
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306 |
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307 if err = auth.RunAs( |
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308 ctx, pwResetRole, func(conn *sql.Conn) error { |
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309 err := conn.QueryRowContext(ctx, findRequestSQL, hash).Scan(&email, &user) |
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310 switch { |
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311 case err == sql.ErrNoRows: |
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312 return JSONError{http.StatusNotFound, "No such hash"} |
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313 case err != nil: |
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314 return err |
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315 } |
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316 password = generateNewPassword() |
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317 res, err := conn.ExecContext(ctx, updatePasswordSQL, password, user) |
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318 if err != nil { |
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319 return err |
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320 } |
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321 if n, err2 := res.RowsAffected(); err2 == nil && n == 0 { |
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322 return JSONError{http.StatusNotFound, "User not found"} |
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323 } |
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324 _, err = conn.ExecContext(ctx, deleteRequestSQL, hash) |
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325 return err |
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326 }); err == nil { |
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327 body := changedMessageBody(useHTTPS(req), user, password, host(req)) |
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328 if err = misc.SendMail(email, "Password Reset Done", body); err == nil { |
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329 jr.Result = &struct { |
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330 SendTo string `json:"send-to"` |
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331 }{email} |
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332 } |
310
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333 } |
304
69e291f26bbd
Password reset: Part II.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
302
diff
changeset
|
334 return |
69e291f26bbd
Password reset: Part II.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
302
diff
changeset
|
335 } |