First implementation

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 # Gradle-related local directories
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 /build
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 /.idea
 # Local dev config
 /application.yaml
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+++ b/README.md
@@ -0,0 +1,47 @@
 # Introduction
 mxisd is an implementation of the Matrix Identity Server which aims to provide an alternative
 to [sydent](https://github.com/matrix-org/sydent) and an external validation implementation of the
 [Identity Service API](http://matrix.org/docs/spec/identity_service/unstable.html).
 mxisd is currently in read-only mode with a LDAP backend, allowing to lookup the Matrix ID from an arbitrary attribute.
 # Quick start
 ## Requirements
 - JDK 1.8
 ## Build
 ```
 git clone https://github.com/kamax-io/mxisd.git
 cd mxisd
 ./gradlew build
 ```
 ## Configure
 1. Create a new local config: `cp application.example.yaml application.yaml`
 - Edit `application.yaml` to your needs - at least provide the LDAP attributes
 - Edit an entity in your LDAP database and set the configure attribute with a Matrix ID (@johndoe:example.org)
 ## Run
 Start the server in foreground with configuration location info `./build/libs/mxisd --spring.config.location=../../`
 You should see a public key with `curl http://localhost:8090/_matrix/identity/api/v1/pubkey/ed25519%3A0`
 You should see some JSON data with `curl http://localhost:8090/_matrix/identity/api/v1/lookup?medium=email&address=johndoe@example.org`
 If you plan on testing the integration with a homeserver, you will need to run an HTTPS reverse proxy in front of it
 as the homeserver implementation seems to require a HTTPS connection to an ID server.
 # Install
 1. Create a dedicated user: `useradd -r mxisd`
 - Create config directory: `mkdir /etc/mxis`
 - Change user ownership of `/etc/mxis` to dedicated user: `chown mxisd /etc/mxis`
 - Copy `./build/libs/mxisd` to `/usr/bin/mxisd`: `sudo cp ./build/libs/mxisd /usr/bin/mxisd`
 - Copy (or create a new) `./application.yaml` to `/etc/mxis/mxisd.yaml`
 - Configure `/etc/mxis/mxisd.yaml` with production value - key.path being the most important - `/etc/mxis/signing.key` is recommended
 - Copy `main/systemd/mxisd.service` to `/etc/systemd/system/` and edit as needed
 - Enable service: `systemctl enable mxisd`
 - Start service: `systemctl start mxisd`
 # TODO
 - Deb package
 - Auto-discovery of matrix ids based on server name and username-like attribute
--- a/application.example.yaml
+++ b/application.example.yaml
@@ -0,0 +1,15 @@
 server:
  port: 8090
  name: 'example.org'
 key:
  path: '/var/tmp/mxis-signing.key'
 ldap:
  host: 'localhost'
  port: 389
  baseDn: 'CN=Users,DC=example,DC=org'
  query: '(|(mailPrimaryAddress=%3pid)(mail=%3pid)(otherMailbox=%3pid))'
  attribute: 'pager'
  bindDn: 'CN=Identity Server,CN=Users,DC=example,DC=org'
  bindPassword: 'password'
--- a/build.gradle
+++ b/build.gradle
@@ -0,0 +1,63 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 apply plugin: 'groovy'
 apply plugin: 'org.springframework.boot'
 buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'org.springframework.boot:spring-boot-gradle-plugin:1.4.3.RELEASE'
    }
 }
 repositories {
    mavenCentral()
 }
 dependencies {
    // We are a groovy project
    compile 'org.codehaus.groovy:groovy-all:2.4.7'
    // Easy file management
    compile 'commons-io:commons-io:2.5'
    // Spring Boot - standalone app
    compile 'org.springframework.boot:spring-boot-starter-web:1.4.3.RELEASE'
    // ed25519 handling
    compile 'net.i2p.crypto:eddsa:0.1.0'
    // LDAP connector
    compile 'org.apache.directory.api:api-all:1.0.0-RC2'
    testCompile 'junit:junit:4.12'
 }
 springBoot {
    executable = true
    embeddedLaunchScriptProperties = [
            confFolder: "/etc/default"
    ]
 }
--- a/gradle/wrapper/gradle-wrapper.jar
+++ b/gradle/wrapper/gradle-wrapper.jar
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
 #Mon Jan 23 02:34:52 CET 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
 distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-bin.zip
--- a/172
+++ b/172
@@ -0,0 +1,172 @@
 #!/usr/bin/env sh
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
 ##
 ##############################################################################
 # Attempt to set APP_HOME
 # Resolve links: $0 may be a link
 PRG="$0"
 # Need this for relative symlinks.
 while [ -h "$PRG" ] ; do
    ls=`ls -ld "$PRG"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '/.*' > /dev/null; then
        PRG="$link"
    else
        PRG=`dirname "$PRG"`"/$link"
    fi
 done
 SAVED="`pwd`"
 cd "`dirname \"$PRG\"`/" >/dev/null
 APP_HOME="`pwd -P`"
 cd "$SAVED" >/dev/null
 APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS=""
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 warn ( ) {
    echo "$*"
 }
 die ( ) {
    echo
    echo "$*"
    echo
    exit 1
 }
 # OS specific support (must be 'true' or 'false').
 cygwin=false
 msys=false
 darwin=false
 nonstop=false
 case "`uname`" in
  CYGWIN* )
    cygwin=true
    ;;
  Darwin* )
    darwin=true
    ;;
  MINGW* )
    msys=true
    ;;
  NONSTOP* )
    nonstop=true
    ;;
 esac
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
        # IBM's JDK on AIX uses strange locations for the executables
        JAVACMD="$JAVA_HOME/jre/sh/java"
    else
        JAVACMD="$JAVA_HOME/bin/java"
    fi
    if [ ! -x "$JAVACMD" ] ; then
        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
    fi
 else
    JAVACMD="java"
    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
 fi
 # Increase the maximum file descriptors if we can.
 if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
    MAX_FD_LIMIT=`ulimit -H -n`
    if [ $? -eq 0 ] ; then
        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
            MAX_FD="$MAX_FD_LIMIT"
        fi
        ulimit -n $MAX_FD
        if [ $? -ne 0 ] ; then
            warn "Could not set maximum file descriptor limit: $MAX_FD"
        fi
    else
        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
    fi
 fi
 # For Darwin, add options to specify how the application appears in the dock
 if $darwin; then
    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 # For Cygwin, switch paths to Windows format before running java
 if $cygwin ; then
    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
    JAVACMD=`cygpath --unix "$JAVACMD"`
    # We build the pattern for arguments to be converted via cygpath
    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
    SEP=""
    for dir in $ROOTDIRSRAW ; do
        ROOTDIRS="$ROOTDIRS$SEP$dir"
        SEP="|"
    done
    OURCYGPATTERN="(^($ROOTDIRS))"
    # Add a user-defined pattern to the cygpath arguments
    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
    fi
    # Now convert the arguments - kludge to limit ourselves to /bin/sh
    i=0
    for arg in "$@" ; do
        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
        else
            eval `echo args$i`="\"$arg\""
        fi
        i=$((i+1))
    done
    case $i in
        (0) set -- ;;
        (1) set -- "$args0" ;;
        (2) set -- "$args0" "$args1" ;;
        (3) set -- "$args0" "$args1" "$args2" ;;
        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
    esac
 fi
 # Escape application args
 save ( ) {
    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
    echo " "
 }
 APP_ARGS=$(save "$@")
 # Collect all arguments for the java command, following the shell quoting and substitution rules
 eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
 if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
  cd "$(dirname "$0")"
 fi
 exec "$JAVACMD" "$@"
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -0,0 +1,84 @@
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem  Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
 if "%OS%"=="Windows_NT" setlocal
 set DIRNAME=%~dp0
 if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 set DEFAULT_JVM_OPTS=
@rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if "%ERRORLEVEL%" == "0" goto init
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 echo.
 echo Please set the JAVA_HOME variable in your environment to match the
 echo location of your Java installation.
 goto fail
 :findJavaFromJavaHome
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 if exist "%JAVA_EXE%" goto init
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
 echo.
 echo Please set the JAVA_HOME variable in your environment to match the
 echo location of your Java installation.
 goto fail
 :init
@rem Get command-line arguments, handling Windows variants
 if not "%OS%" == "Windows_NT" goto win9xME_args
 :win9xME_args
@rem Slurp the command line arguments.
 set CMD_LINE_ARGS=
 set _SKIP=2
 :win9xME_args_slurp
 if "x%~1" == "x" goto execute
 set CMD_LINE_ARGS=%*
 :execute
@rem Setup the command line
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
 "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
 :end
@rem End local scope for the variables with windows NT shell
 if "%ERRORLEVEL%"=="0" goto mainEnd
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
 if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
 exit /b 1
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal
 :omega
--- a/src/main/groovy/io/kamax/mxisd/MatrixIdentityServerApplication.groovy
+++ b/src/main/groovy/io/kamax/mxisd/MatrixIdentityServerApplication.groovy
@@ -0,0 +1,33 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd
 import org.springframework.boot.SpringApplication
 import org.springframework.boot.autoconfigure.SpringBootApplication
@SpringBootApplication
 class MatrixIdentityServerApplication {
    static void main(String[] args) throws Exception {
        SpringApplication.run(MatrixIdentityServerApplication.class, args)
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/config/KeyConfig.groovy
+++ b/src/main/groovy/io/kamax/mxisd/config/KeyConfig.groovy
@@ -0,0 +1,49 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.config
 import org.apache.commons.lang.StringUtils
 import org.springframework.beans.factory.InitializingBean
 import org.springframework.boot.context.properties.ConfigurationProperties
 import org.springframework.context.annotation.Configuration
@Configuration
@ConfigurationProperties(prefix = "key")
 class KeyConfig implements InitializingBean {
    private String path
    void setPath(String path) {
        this.path = path
    }
    String getPath() {
        return path
    }
    @Override
    void afterPropertiesSet() throws Exception {
        if (StringUtils.isBlank(getPath())) {
            throw new RuntimeException("Key path must be configured!")
        }
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/config/LdapConfig.groovy
+++ b/src/main/groovy/io/kamax/mxisd/config/LdapConfig.groovy
@@ -0,0 +1,94 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.config
 import org.springframework.boot.context.properties.ConfigurationProperties
 import org.springframework.context.annotation.Configuration
@Configuration
@ConfigurationProperties(prefix = "ldap")
 class LdapConfig {
    private String host
    private int port
    private String baseDn
    private String query
    private String attribute
    private String bindDn
    private String bindPassword
    String getHost() {
        return host
    }
    void setHost(String host) {
        this.host = host
    }
    int getPort() {
        return port
    }
    void setPort(int port) {
        this.port = port
    }
    String getBaseDn() {
        return baseDn
    }
    void setBaseDn(String baseDn) {
        this.baseDn = baseDn
    }
    String getQuery() {
        return query
    }
    void setQuery(String query) {
        this.query = query
    }
    String getAttribute() {
        return attribute
    }
    void setAttribute(String attribute) {
        this.attribute = attribute
    }
    String getBindDn() {
        return bindDn
    }
    void setBindDn(String bindDn) {
        this.bindDn = bindDn
    }
    String getBindPassword() {
        return bindPassword
    }
    void setBindPassword(String bindPassword) {
        this.bindPassword = bindPassword
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/config/ServerConfig.groovy
+++ b/src/main/groovy/io/kamax/mxisd/config/ServerConfig.groovy
@@ -0,0 +1,49 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.config
 import org.apache.commons.lang.StringUtils
 import org.springframework.beans.factory.InitializingBean
 import org.springframework.boot.context.properties.ConfigurationProperties
 import org.springframework.context.annotation.Configuration
@Configuration
@ConfigurationProperties(prefix = "server")
 class ServerConfig implements InitializingBean {
    private String name
    String getName() {
        return name
    }
    void setName(String name) {
        this.name = name
    }
    @Override
    void afterPropertiesSet() throws Exception {
        if (StringUtils.isBlank(getName())) {
            throw new RuntimeException("Server name must be configured!")
        }
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/controller/InvitationController.groovy
+++ b/src/main/groovy/io/kamax/mxisd/controller/InvitationController.groovy
@@ -0,0 +1,37 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.controller
 import io.kamax.mxisd.exception.NotImplementedException
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RestController
 import static org.springframework.web.bind.annotation.RequestMethod.POST
@RestController
 class InvitationController {
    @RequestMapping(value = "/_matrix/identity/api/v1/store-invite", method = POST)
    String store() {
        throw new NotImplementedException()
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/controller/KeyController.groovy
+++ b/src/main/groovy/io/kamax/mxisd/controller/KeyController.groovy
@@ -0,0 +1,61 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.controller
 import groovy.json.JsonOutput
 import io.kamax.mxisd.exception.BadRequestException
 import io.kamax.mxisd.exception.NotImplementedException
 import io.kamax.mxisd.key.KeyManager
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.web.bind.annotation.PathVariable
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RestController
 import static org.springframework.web.bind.annotation.RequestMethod.GET
@RestController
 class KeyController {
    @Autowired
    private KeyManager keyMgr
    @RequestMapping(value = "/_matrix/identity/api/v1/pubkey/{keyType}:{keyId}", method = GET)
    String getKey(@PathVariable String keyType, @PathVariable int keyId) {
        if (!"ed25519".contentEquals(keyType)) {
            throw new BadRequestException("Invalid algorithm: " + keyType)
        }
        return JsonOutput.toJson([
                public_key: keyMgr.getPublicKeyBase64(keyId)
        ])
    }
    @RequestMapping(value = "/_matrix/identity/api/v1/pubkey/ephemeral/isvalid", method = GET)
    String checkEphemeralKeyValidity() {
        throw new NotImplementedException()
    }
    @RequestMapping(value = "/_matrix/identity/api/v1/pubkey/isvalid", method = GET)
    String checkKeyValidity() {
        throw new NotImplementedException()
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/controller/MappingController.groovy
+++ b/src/main/groovy/io/kamax/mxisd/controller/MappingController.groovy
@@ -0,0 +1,89 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.controller
 import groovy.json.JsonOutput
 import io.kamax.mxisd.config.LdapConfig
 import io.kamax.mxisd.exception.BadRequestException
 import io.kamax.mxisd.signature.SignatureManager
 import org.apache.directory.api.ldap.model.cursor.EntryCursor
 import org.apache.directory.api.ldap.model.entry.Attribute
 import org.apache.directory.api.ldap.model.message.SearchScope
 import org.apache.directory.ldap.client.api.LdapConnection
 import org.apache.directory.ldap.client.api.LdapNetworkConnection
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RequestParam
 import org.springframework.web.bind.annotation.RestController
 import static org.springframework.web.bind.annotation.RequestMethod.GET
@RestController
 class MappingController {
    @Autowired
    private LdapConfig ldapCfg
    @Autowired
    private SignatureManager signMgr
    @RequestMapping(value = "/_matrix/identity/api/v1/lookup", method = GET)
    String lookup(@RequestParam String medium, @RequestParam String address) {
        if (!"email".contentEquals(medium)) {
            throw new BadRequestException("Invalid medium type")
        }
        LdapConnection conn = new LdapNetworkConnection(ldapCfg.getHost(), ldapCfg.getPort())
        try {
            conn.bind(ldapCfg.getBindDn(), ldapCfg.getBindPassword())
            String searchQuery = ldapCfg.getQuery().replaceAll("%3pid", address)
            EntryCursor cursor = conn.search(ldapCfg.getBaseDn(), searchQuery, SearchScope.SUBTREE, ldapCfg.getAttribute())
            try {
                if (!cursor.next()) {
                    return JsonOutput.toJson([])
                }
                Attribute attribute = cursor.get().get(ldapCfg.getAttribute())
                if (attribute == null) {
                    return JsonOutput.toJson([])
                }
                def data = new LinkedHashMap([
                        address   : address,
                        medium    : medium,
                        mxid      : attribute.get().toString(),
                        not_before: 0,
                        not_after : 9223372036854775807,
                        ts        : 0
                ])
                data['signatures'] = signMgr.signMessage(JsonOutput.toJson(data))
                return JsonOutput.toJson(data)
            } finally {
                cursor.close()
            }
        } finally {
            conn.close()
        }
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/controller/SessionController.groovy
+++ b/src/main/groovy/io/kamax/mxisd/controller/SessionController.groovy
@@ -0,0 +1,53 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.controller
 import io.kamax.mxisd.exception.NotImplementedException
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RestController
 import static org.springframework.web.bind.annotation.RequestMethod.GET
 import static org.springframework.web.bind.annotation.RequestMethod.POST
@RestController
 class SessionController {
    @RequestMapping(value = "/_matrix/identity/api/v1/validate/email/requestToken", method = POST)
    String init() {
        throw new NotImplementedException()
    }
    @RequestMapping(value = "/_matrix/identity/api/v1/validate/email/submitToken", method = [GET, POST])
    String validate() {
        throw new NotImplementedException()
    }
    @RequestMapping(value = "/_matrix/identity/api/v1/3pid/getValidated3pid", method = POST)
    String check() {
        throw new NotImplementedException()
    }
    @RequestMapping(value = "/_matrix/identity/api/v1/3pid/bind", method = POST)
    String bind() {
        throw new NotImplementedException()
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/exception/BadRequestException.groovy
+++ b/src/main/groovy/io/kamax/mxisd/exception/BadRequestException.groovy
@@ -0,0 +1,33 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.exception
 import org.springframework.http.HttpStatus
 import org.springframework.web.bind.annotation.ResponseStatus
@ResponseStatus(value = HttpStatus.BAD_REQUEST)
 class BadRequestException extends RuntimeException {
    BadRequestException(String s) {
        super(s)
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/exception/NotImplementedException.groovy
+++ b/src/main/groovy/io/kamax/mxisd/exception/NotImplementedException.groovy
@@ -0,0 +1,28 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.exception
 import org.springframework.http.HttpStatus
 import org.springframework.web.bind.annotation.ResponseStatus
@ResponseStatus(value = HttpStatus.NOT_IMPLEMENTED)
 class NotImplementedException extends RuntimeException {
 }
--- a/src/main/groovy/io/kamax/mxisd/key/KeyManager.groovy
+++ b/src/main/groovy/io/kamax/mxisd/key/KeyManager.groovy
@@ -0,0 +1,107 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.key
 import io.kamax.mxisd.config.KeyConfig
 import net.i2p.crypto.eddsa.EdDSAEngine
 import net.i2p.crypto.eddsa.EdDSAPrivateKey
 import net.i2p.crypto.eddsa.EdDSAPublicKey
 import net.i2p.crypto.eddsa.KeyPairGenerator
 import net.i2p.crypto.eddsa.spec.EdDSANamedCurveTable
 import net.i2p.crypto.eddsa.spec.EdDSAParameterSpec
 import net.i2p.crypto.eddsa.spec.EdDSAPrivateKeySpec
 import net.i2p.crypto.eddsa.spec.EdDSAPublicKeySpec
 import org.apache.commons.io.FileUtils
 import org.springframework.beans.factory.InitializingBean
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.stereotype.Component
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
 import java.nio.file.Path
 import java.nio.file.Paths
 import java.security.KeyPair
 import java.security.MessageDigest
 import java.security.PrivateKey
 import java.security.PublicKey
@Component
 class KeyManager implements InitializingBean {
    @Autowired
    private KeyConfig keyCfg
    private EdDSAParameterSpec keySpecs
    private EdDSAEngine signEngine
    private List<KeyPair> keys
    @Override
    void afterPropertiesSet() throws Exception {
        keySpecs = EdDSANamedCurveTable.getByName(EdDSANamedCurveTable.CURVE_ED25519_SHA512)
        signEngine = new EdDSAEngine(MessageDigest.getInstance(keySpecs.getHashAlgorithm()))
        keys = new ArrayList<>()
        Path privKey = Paths.get(keyCfg.getPath())
        if (!Files.exists(privKey)) {
            KeyPair pair = (new KeyPairGenerator()).generateKeyPair()
            String keyEncoded = Base64.getEncoder().encodeToString(pair.getPrivate().getEncoded())
            FileUtils.writeStringToFile(privKey.toFile(), keyEncoded, StandardCharsets.ISO_8859_1)
            keys.add(pair)
        } else {
            if (Files.isDirectory(privKey)) {
                throw new RuntimeException("Invalid path for private key: ${privKey.toString()}")
            }
            if (Files.isReadable(privKey)) {
                byte[] seed = Base64.getDecoder().decode(FileUtils.readFileToString(privKey.toFile(), StandardCharsets.ISO_8859_1))
                EdDSAPrivateKeySpec privKeySpec = new EdDSAPrivateKeySpec(seed, keySpecs)
                EdDSAPublicKeySpec pubKeySpec = new EdDSAPublicKeySpec(privKeySpec.getA(), keySpecs)
                keys.add(new KeyPair(new EdDSAPublicKey(pubKeySpec), new EdDSAPrivateKey(privKeySpec)))
            }
        }
    }
    int getCurrentIndex() {
        return 0
    }
    KeyPair getKeys(int index) {
        return keys.get(index)
    }
    PrivateKey getPrivateKey(int index) {
        return getKeys(index).getPrivate()
    }
    PublicKey getPublicKey(int index) {
        return getKeys(index).getPublic()
    }
    EdDSAParameterSpec getSpecs() {
        return keySpecs
    }
    String getPublicKeyBase64(int index) {
        return Base64.getEncoder().encodeToString(getPublicKey(index).getEncoded())
    }
 }
--- a/src/main/groovy/io/kamax/mxisd/signature/SignatureManager.groovy
+++ b/src/main/groovy/io/kamax/mxisd/signature/SignatureManager.groovy
@@ -0,0 +1,59 @@
 /*
 * mxisd - Matrix Identity Server Daemon
 * Copyright (C) 2017 Maxime Dor
 *
 * https://max.kamax.io/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 package io.kamax.mxisd.signature
 import io.kamax.mxisd.config.ServerConfig
 import io.kamax.mxisd.key.KeyManager
 import net.i2p.crypto.eddsa.EdDSAEngine
 import org.springframework.beans.factory.InitializingBean
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.stereotype.Component
 import java.security.MessageDigest
@Component
 class SignatureManager implements InitializingBean {
    @Autowired
    private KeyManager keyMgr
    @Autowired
    private ServerConfig srvCfg
    private EdDSAEngine signEngine
    Map<?, ?> signMessage(String message) {
        byte[] signRaw = signEngine.signOneShot(message.getBytes())
        String sign = Base64.getEncoder().encodeToString(signRaw)
        return [
                "${srvCfg.getName()}": [
                        "ed25519:${keyMgr.getCurrentIndex()}": sign
                ]
        ]
    }
    @Override
    void afterPropertiesSet() throws Exception {
        signEngine = new EdDSAEngine(MessageDigest.getInstance(keyMgr.getSpecs().getHashAlgorithm()))
        signEngine.initSign(keyMgr.getPrivateKey(keyMgr.getCurrentIndex()))
    }
 }
--- a/src/main/systemd/mxisd.service
+++ b/src/main/systemd/mxisd.service
@@ -0,0 +1,11 @@
 [Unit]
 Description=mxisd
 After=syslog.target
 [Service]
 User=mxisd
 ExecStart=/usr/bin/mxisd --spring.config.location=/etc/mxis/ --spring.config.name=mxisd
 SuccessExitStatus=143
 [Install]
 WantedBy=multi-user.target