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From my...@apache.org
Subject [fineract-cn-crypto] 01/05: Initial Commit
Date Mon, 22 Jan 2018 15:07:26 GMT
This is an automated email from the ASF dual-hosted git repository.

myrle pushed a commit to branch develop
in repository https://gitbox.apache.org/repos/asf/fineract-cn-crypto.git

commit a1fa99632ac81e430d039b2078dc68571470415b
Author: Markus Geiss <mgeiss@mifos.org>
AuthorDate: Wed Mar 15 16:49:50 2017 +0100

    Initial Commit
---
 .gitignore                                         |  15 ++
 HEADER                                             |  13 ++
 LICENSE                                            | 201 +++++++++++++++++++++
 README.md                                          |  26 +++
 build.gradle                                       |  77 ++++++++
 gradlew                                            | 172 ++++++++++++++++++
 gradlew.bat                                        |  84 +++++++++
 settings.gradle                                    |   2 +
 .../java/io/mifos/tool/crypto/HashGenerator.java   |  75 ++++++++
 .../java/io/mifos/tool/crypto/SaltGenerator.java   |  43 +++++
 .../crypto/config/CryptoSpringConfiguration.java   |  37 ++++
 .../io/mifos/tool/crypto/config/EnableCrypto.java  |  35 ++++
 .../io/mifos/tool/crypto/HashGeneratorSample.java  | 140 ++++++++++++++
 src/test/resources/.hash                           | Bin 0 -> 32 bytes
 src/test/resources/.password                       | Bin 0 -> 32 bytes
 src/test/resources/.salt                           |   1 +
 src/test/resources/.secret                         |   1 +
 src/test/resources/logback.xml                     |  30 +++
 18 files changed, 952 insertions(+)

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..89f536d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,15 @@
+.gradle
+.idea
+build/
+target/
+gradle/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+*.iml
+
+*.log
\ No newline at end of file
diff --git a/HEADER b/HEADER
new file mode 100644
index 0000000..76f9222
--- /dev/null
+++ b/HEADER
@@ -0,0 +1,13 @@
+Copyright ${year} ${name}
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..8dada3e
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      "Licensor" shall mean the copyright owner or entity authorized by
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+
+      "Legal Entity" shall mean the union of the acting entity and all
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+      direction or management of such entity, whether by contract or
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+      the terms of any separate license agreement you may have executed
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+   6. Trademarks. This License does not grant permission to use the trade
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
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+      on Your own behalf and on Your sole responsibility, not on behalf
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+   APPENDIX: How to apply the Apache License to your work.
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+      To apply the Apache License to your work, attach the following
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+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0bf5bba
--- /dev/null
+++ b/README.md
@@ -0,0 +1,26 @@
+# Mifos I/O Crypto Tools
+
+[![Join the chat at https://gitter.im/mifos-initiative/mifos.io](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/mifos-initiative/mifos.io?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+## Abstract
+Utility component to create random salts and hash credentials.
+
+## Versioning
+The version numbers follow the [Semantic Versioning](http://semver.org/) scheme.
+
+In addition to MAJOR.MINOR.PATCH the following postfixes are used to indicate the development
state.
+
+* BUILD-SNAPSHOT - A release currently in development. 
+* M - A _milestone_ release include specific sets of functions and are released as soon as
the functionality is complete.
+* RC - A _release candidate_ is a version with potential to be a final product, considered
_code complete_.
+* RELEASE - indicates that this release is the best available version and is recommended
for all usage.
+
+The versioning layout is {MAJOR}.{MINOR}.{PATCH}-{INDICATOR}[.{PATCH}]. Only milestones and
release candidates can  have patch versions. Some examples:
+
+1.2.3-BUILD-SNAPSHOT  
+1.3.5-M.1  
+1.5.7-RC.2  
+2.0.0-RELEASE
+
+## License
+See [LICENSE](LICENSE) file.
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..cb15e74
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,77 @@
+buildscript {
+    repositories {
+        jcenter()
+    }
+
+    dependencies {
+        classpath ("io.spring.gradle:dependency-management-plugin:0.6.0.RELEASE")
+    }
+}
+
+plugins {
+    id "com.github.hierynomus.license" version "0.13.1"
+}
+
+group 'io.mifos.tools'
+version '0.1.0-BUILD-SNAPSHOT'
+
+apply plugin: 'java'
+apply plugin: 'idea'
+apply plugin: 'maven'
+apply plugin: 'maven-publish'
+
+sourceCompatibility = JavaVersion.VERSION_1_8
+targetCompatibility = JavaVersion.VERSION_1_8
+
+repositories {
+    jcenter()
+}
+
+ext.versions = [
+        spring        : '4.3.2.RELEASE',
+        springsecurity: '4.0.2.RELEASE',
+        logback       : '1.1.3',
+        slf4j         : '1.7.13',
+        findbugs      : '3.0.1',
+        junit         : '4.12',
+        springtest    : '4.3.2.RELEASE'
+]
+
+configurations {
+    compile.exclude group: 'commons-logging', module: 'commons-logging'
+}
+
+dependencies {
+    compile(
+            [group: 'org.springframework', name: 'spring-context', version: versions.spring],
+            [group: 'org.springframework.security', name: 'spring-security-core', version:
versions.springsecurity],
+            [group: 'ch.qos.logback', name: 'logback-classic', version: versions.logback],
+            [group: 'org.slf4j', name: 'jcl-over-slf4j', version: versions.slf4j],
+            [group: 'com.google.code.findbugs', name: 'jsr305', version: versions.findbugs]
+    )
+    testCompile(
+            [group: 'junit', name: 'junit', version: versions.junit],
+            [group: 'org.springframework', name: 'spring-test', version: versions.springtest]
+    )
+}
+
+license {
+    header rootProject.file('HEADER')
+    strictCheck true
+    mapping {
+        java = 'SLASHSTAR_STYLE'
+    }
+    ext.year = Calendar.getInstance().get(Calendar.YEAR)
+    ext.name = 'The Mifos Initiative'
+}
+
+publishing {
+    publications {
+        babel(MavenPublication) {
+            from components.java
+            groupId project.group
+            artifactId project.name
+            version project.version
+        }
+    }
+}
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..4453cce
--- /dev/null
+++ b/gradlew
@@ -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" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..f955316
--- /dev/null
+++ 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
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..10a18f0
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = 'crypto'
+
diff --git a/src/main/java/io/mifos/tool/crypto/HashGenerator.java b/src/main/java/io/mifos/tool/crypto/HashGenerator.java
new file mode 100644
index 0000000..78a9ef0
--- /dev/null
+++ b/src/main/java/io/mifos/tool/crypto/HashGenerator.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2017 The Mifos Initiative
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.mifos.tool.crypto;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.security.crypto.util.EncodingUtils;
+import org.springframework.stereotype.Component;
+import org.springframework.util.Assert;
+import org.springframework.util.Base64Utils;
+
+import javax.annotation.Nonnegative;
+import javax.annotation.Nonnull;
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.PBEKeySpec;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.InvalidKeySpecException;
+
+@Component
+public class HashGenerator {
+
+  private final Environment environment;
+
+  @Autowired
+  public HashGenerator(final Environment environment) {
+    super();
+    this.environment = environment;
+  }
+
+  @Nonnull
+  public byte[] hash(@Nonnull final String password, @Nonnull final byte[] salt,
+                     @Nonnegative final int iterationCount, @Nonnegative final int length)
{
+    Assert.notNull(password, "Password must be given!");
+    Assert.notNull(salt, "Salt must be given!");
+    Assert.isTrue(iterationCount > 0, "Iteration count must be greater than zero!");
+    Assert.isTrue(length > 0, "Length must be greater than zero!");
+
+    try {
+      final PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(), salt, iterationCount,
length);
+      final SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
+      final byte[] encodedHash = secretKeyFactory.generateSecret(pbeKeySpec).getEncoded();
+      return encodedHash;
+    } catch (final NoSuchAlgorithmException | InvalidKeySpecException ex) {
+      throw new IllegalStateException(ex);
+    }
+  }
+
+  public boolean isEqual(@Nonnull final byte[] knownHash, @Nonnull final byte[] password,
@Nonnull final byte[] secret,
+                         @Nonnull final byte[] salt, @Nonnegative final int iterationCount,
@Nonnegative final int length) {
+    Assert.notNull(knownHash, "Known hash must be given!");
+    Assert.notNull(password, "Password must be given!");
+    Assert.notNull(salt, "Salt must be given!");
+    Assert.isTrue(iterationCount > 0, "Iteration count must be greater than zero!");
+    Assert.isTrue(length > 0, "Length must be greater than zero!");
+    final byte[] internalSalt = EncodingUtils.concatenate(salt, secret);
+
+    final byte[] computedHash = this.hash(Base64Utils.encodeToString(password), internalSalt,
iterationCount, length);
+
+    return MessageDigest.isEqual(knownHash, computedHash);
+  }
+}
diff --git a/src/main/java/io/mifos/tool/crypto/SaltGenerator.java b/src/main/java/io/mifos/tool/crypto/SaltGenerator.java
new file mode 100644
index 0000000..7cb0943
--- /dev/null
+++ b/src/main/java/io/mifos/tool/crypto/SaltGenerator.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2017 The Mifos Initiative
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.mifos.tool.crypto;
+
+import org.springframework.stereotype.Component;
+import org.springframework.util.Base64Utils;
+
+import javax.annotation.Nonnull;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+
+@Component
+public final class SaltGenerator {
+
+  public SaltGenerator() {
+    super();
+  }
+
+  @Nonnull
+  public byte[] createRandomSalt() {
+    try {
+      final SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
+      final byte[] salt = new byte[32];
+      secureRandom.nextBytes(salt);
+      return Base64Utils.encode(salt);
+    } catch (final NoSuchAlgorithmException nsaex) {
+      throw new IllegalStateException(nsaex);
+    }
+  }
+}
diff --git a/src/main/java/io/mifos/tool/crypto/config/CryptoSpringConfiguration.java b/src/main/java/io/mifos/tool/crypto/config/CryptoSpringConfiguration.java
new file mode 100644
index 0000000..bfce20e
--- /dev/null
+++ b/src/main/java/io/mifos/tool/crypto/config/CryptoSpringConfiguration.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2017 The Mifos Initiative
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.mifos.tool.crypto.config;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.FilterType;
+
+@Configuration
+@ComponentScan(
+    basePackages = {
+        "io.mifos.tool.crypto"
+    },
+    excludeFilters = {
+        @ComponentScan.Filter(
+            type = FilterType.ASSIGNABLE_TYPE,
+            value = {
+                CryptoSpringConfiguration.class
+            }
+        )
+    }
+)
+public class CryptoSpringConfiguration {
+}
diff --git a/src/main/java/io/mifos/tool/crypto/config/EnableCrypto.java b/src/main/java/io/mifos/tool/crypto/config/EnableCrypto.java
new file mode 100644
index 0000000..e7391f8
--- /dev/null
+++ b/src/main/java/io/mifos/tool/crypto/config/EnableCrypto.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2017 The Mifos Initiative
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.mifos.tool.crypto.config;
+
+import org.springframework.context.annotation.Import;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Inherited
+@Import({
+    CryptoSpringConfiguration.class
+})
+public @interface EnableCrypto {
+}
diff --git a/src/test/java/io/mifos/tool/crypto/HashGeneratorSample.java b/src/test/java/io/mifos/tool/crypto/HashGeneratorSample.java
new file mode 100644
index 0000000..1e7017a
--- /dev/null
+++ b/src/test/java/io/mifos/tool/crypto/HashGeneratorSample.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2017 The Mifos Initiative
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.mifos.tool.crypto;
+
+import io.mifos.tool.crypto.config.EnableCrypto;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.crypto.util.EncodingUtils;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.util.Base64Utils;
+
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+    classes = {
+        HashGeneratorSample.SampleSpringConfiguration.class
+    },
+    loader = AnnotationConfigContextLoader.class
+)
+public class HashGeneratorSample {
+
+  @Configuration
+  @EnableCrypto
+  public static class SampleSpringConfiguration {
+
+    public SampleSpringConfiguration() {
+      super();
+    }
+  }
+
+  private static final String USERNAME = "nebuchadnezzar";
+  private static final String TENANT = "sippar";
+  private static final String DOMAIN = "babylon.ad";
+  private static final String PASSWORD = "m4duk";
+  private static final int ITERATION_COUNT = 4096;
+  private static final int HASH_LENGTH = 256;
+
+  @Autowired
+  private SaltGenerator saltGenerator;
+
+  @Autowired
+  private HashGenerator hashGenerator;
+
+  public HashGeneratorSample() {
+    super();
+  }
+
+  @Test
+  public void clientPasswordHashSpecification() throws Exception {
+    // 1. create user specific salt, username+tenant+TLD, Base64 URL encoded
+    final StringBuilder saltBuilder = new StringBuilder();
+    saltBuilder.append(USERNAME).append(TENANT).append(DOMAIN);
+    final byte[] salt = Base64Utils.encode(saltBuilder.toString().getBytes());
+
+    // 2. encode user password URL safe with Base64
+    final String encodedPassword = Base64Utils.encodeToString(PASSWORD.getBytes());
+
+    // 3. create user password hash, to be send to service
+    final byte[] hash = this.hashGenerator.hash(encodedPassword, salt, ITERATION_COUNT, HASH_LENGTH);
+
+    Assert.assertNotNull(hash);
+    Assert.assertTrue(hash.length > 0);
+  }
+
+  @Test
+  public void servicePasswordHashSpecification() throws Exception {
+    // 0. retrieve user password
+    final byte[] password = Files.readAllBytes(
+        Paths.get(getClass().getClassLoader()
+            .getResource(".password")
+            .toURI()));
+
+    // 1. read stored secret
+    final byte[] storedSecret = Files.readAllBytes(
+        Paths.get(getClass().getClassLoader()
+            .getResource(".secret")
+            .toURI()));
+
+    // 2. create variable salt, to be stored with user info
+    final byte[] variableSalt = this.saltGenerator.createRandomSalt();
+
+    // 3. concatenate variable salt and secret to create unique salt for this user
+    final byte[] salt = EncodingUtils.concatenate(variableSalt, storedSecret);
+
+    // 4. create hash to be stored with user info
+    final byte[] hash = this.hashGenerator.hash(Base64Utils.encodeToString(password), salt,
ITERATION_COUNT, HASH_LENGTH);
+    Assert.assertNotNull(hash);
+    Assert.assertTrue(hash.length > 0);
+  }
+
+  @Test
+  public void clientPasswordIsEqual() throws Exception {
+    // 0. retrieve user password
+    final byte[] password = Files.readAllBytes(
+        Paths.get(getClass().getClassLoader()
+            .getResource(".password")
+            .toURI()));
+
+    // 1. read stored secret
+    final byte[] storedSecret = Files.readAllBytes(
+        Paths.get(getClass().getClassLoader()
+            .getResource(".secret")
+            .toURI()));
+
+    // 2. read stored variable salt from user info
+    final byte[] storedSalt = Files.readAllBytes(
+        Paths.get(getClass().getClassLoader()
+            .getResource(".salt")
+            .toURI()));
+
+    // 3. read stored hash from user info
+    final byte[] storedHash = Files.readAllBytes(
+        Paths.get(getClass().getClassLoader()
+            .getResource(".hash")
+            .toURI()));
+
+    // 4. check if password is equal with stored hash
+    Assert.assertTrue(this.hashGenerator.isEqual(storedHash, password, storedSecret, storedSalt,
ITERATION_COUNT, HASH_LENGTH));
+  }
+}
diff --git a/src/test/resources/.hash b/src/test/resources/.hash
new file mode 100644
index 0000000..d4f3801
Binary files /dev/null and b/src/test/resources/.hash differ
diff --git a/src/test/resources/.password b/src/test/resources/.password
new file mode 100644
index 0000000..6aaf78e
Binary files /dev/null and b/src/test/resources/.password differ
diff --git a/src/test/resources/.salt b/src/test/resources/.salt
new file mode 100644
index 0000000..66a5a99
--- /dev/null
+++ b/src/test/resources/.salt
@@ -0,0 +1 @@
+qvFMiCnkH83nTZhvgqiPZnQh36syAZdOpv2pQJHvfG4=
\ No newline at end of file
diff --git a/src/test/resources/.secret b/src/test/resources/.secret
new file mode 100644
index 0000000..08987ef
--- /dev/null
+++ b/src/test/resources/.secret
@@ -0,0 +1 @@
+vpkiXILjtE02sg_VPCWXla8Bj6F_zegQmbHgcM0N8Ps=
\ No newline at end of file
diff --git a/src/test/resources/logback.xml b/src/test/resources/logback.xml
new file mode 100644
index 0000000..73dbc1a
--- /dev/null
+++ b/src/test/resources/logback.xml
@@ -0,0 +1,30 @@
+<!--
+
+    Copyright 2017 The Mifos Initiative
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+-->
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>
+                %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="ERROR">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>
\ No newline at end of file

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