Difference between revisions of "DE4A SSI Authority and Edge Agent"

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(Added logging information. Added installation description for the Authority Agent.)
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==== Receive and validate a Verifiable Presentation ====
 
==== Receive and validate a Verifiable Presentation ====
 +
If deployed on the Data Consumer side, the Authority Agent enables organizations to request a diploma in the form of Verifiable Presentations from the students. In that case, a student can directly submit his/her diploma from the mobile wallet to the eProcedure Portal. Once received, the Portal can validate several aspects of the diploma validity: schema, digital signature, issuer and subject.
  
 
=== Supported interaction patterns ===
 
=== Supported interaction patterns ===
Line 39: Line 40:
 
The Authority Agent includes methods monitoring the communication between the REST API and the Aries agent and internal database, and it records produced log messages into an internal log file for easier metric monitoring (the ''de4a-metrics-log.txt'' file is automatically created in the ''/usr/local/tomcat/logs'' in the AA API Docker container). During each API request, the Authority Agent records error messages to the log file along with the information about the component that generated the message, the internal code and description of the message.  
 
The Authority Agent includes methods monitoring the communication between the REST API and the Aries agent and internal database, and it records produced log messages into an internal log file for easier metric monitoring (the ''de4a-metrics-log.txt'' file is automatically created in the ''/usr/local/tomcat/logs'' in the AA API Docker container). During each API request, the Authority Agent records error messages to the log file along with the information about the component that generated the message, the internal code and description of the message.  
 
===Logging messages===
 
===Logging messages===
====TODO: Message types====
+
====Message types====
 
The Authority Agent implements a custom DE4A Logger, which is responsible for producing a pre-defined format of the log message. The Logger provides the following types of messages:
 
The Authority Agent implements a custom DE4A Logger, which is responsible for producing a pre-defined format of the log message. The Logger provides the following types of messages:
 
*'''Info'''
 
*'''Info'''
Line 48: Line 49:
  
 
'''Services''' – ''(Info level)''
 
'''Services''' – ''(Info level)''
*RequestTransferEvidenceIM message received - RequestId: <code>{0}</code>, CanonicalEvidenceType: <code>{1}</code>, DataEvaluator: <code>{2}</code>, DataOwner: <code>{3}</code>
+
 
*
+
* {0}: Received input eIDAS user data.
'''AS4''' – ''(Info level)''
+
* {0}: Received input userId data.
*Sending request message via AS4 gateway - DataEvaluatorId: <code>{0}</code>, DataOwnerId: <code>{1}</code>, CanonicalEvidenceType: <code>{2}</code>
+
* {0}: Generated DID invitation for edge agent.
 +
* {0}: Received input evidence data.
 +
* {0}: Signed a Verifiable Credential.
 +
* {0}: Sent a Verifiable Credential to the edge agent.
 +
* {0}: Accepted a submitted Verifiable Presentation.
 +
* {0}: Decoded input eIDAS user data.
 +
* {0}: Validated the digital signature of the submitted VP.
 +
* {0}: Validated the subject of the submitted VP.
 +
* {0}: Received HTTP response code: {1} from endpoint: {2}.
 +
* {0}: Processing the JSON response received from /{1}.
 +
* {0}: Stored current state in {1} internal database.
 +
* {0}: Received user {1} status data.
 +
* {0}: Converted input evidence in format: {1} to format: {2}.
 +
* {0}: Received response data PIID: {1}.
 +
* {0}: Found a {1} action match with PIID: {2}.
 +
* {0}: Found a Verifiable Presentation with name: {1}.
 +
* {0}: Found a Verifiable Presentation with ID: {1}.
 +
* {0}: Issuer DID has already been generated and registered in EBSI.
 +
* {0}: Successfully created files for EBSI integration.
 +
* {0}: Successfully generated key: {1}, value: {2}.
 +
* {0}: Successfully exported JWK private key.
 +
* {0}: Successfully imported DID document into Aries.
 
*
 
*
 +
 
'''Errors''' – ''(Error level)''
 
'''Errors''' – ''(Error level)''
*The corresponding request to the received response is not found on database - RequestId: <code>{0}</code>
+
 
 +
The following list of error messages are recorded on the Communications, Internal failure and Configuration layers:
 +
 
 +
* Connection error with {0} - {1}
 +
* Error on response from {0} - {1}
 +
* Arguments missing or invalid at {0} - {1}
 +
* Object conversion error on {0} - {1}
 +
* Error accessing/saving data on {0} - {1}
 +
* Error generating {0} key.
 +
* Error exporting JWK private key.
 +
* Error importing DID document into Aries.
 +
* Configuration error occurred on {0}.
 +
 
 
*
 
*
 
----[1] The <code>{x}</code> symbols are placeholders for dynamic text to be logged.
 
----[1] The <code>{x}</code> symbols are placeholders for dynamic text to be logged.
 
===Data management===
 
===Data management===
TODO: The Connector stores and manages certain information such as DE endpoints (not to be confused with SMP endpoints), DO endpoints, certain request records for asynchronous response matching, etc. All this data and where to find it is described in the following subsections.
+
The Authority Agent stores and manages certain information about the DID connections with students' mobile wallets, VC/VP status (e.g. VC offer sent, accepted/rejected, VP request send, VP received, etc.) and its internal EBSI-compliant DID(s).
====DID Information====
 
Once each Data Owner is publishing his Connector service information on the SMP, the request will arrive to that Connector service configured on the SMP (via the AS4 Gateway), and considering that one Connector could be serving to multiples DOs, this Connector has to know the addressing (base endpoint, without path name) information related to a specific participant identifier (e.g. iso6523-actorid-upis::9999:egov) to send forward the request to the corresponding Data Owner, so due to that, the Connector maintains a table, named  '''''<code>owner_addresses</code>''''', with two columns:
 
*'''AgentUrn''': participant identifier in the DE4A format, ''e.g., iso6523-actorid-upis::9999:ess2833002e –'' see the “DE4A Policy for use of identifiers” for further information about the participant identifiers policy.
 
*'''Endpoint''': base endpoint URL of the Data Owner who is exposing the service <code>/requestExtractEvidence</code>
 
The information above will be used by a Connector playing the Transferor role when the ''RequestExtractEvidence'' message is being sent.
 
 
 
==== DID Connection Status ====
 
 
 
==== VC Status ====
 
 
 
==== VP Status ====
 
  
 
==Technology used==
 
==Technology used==
Line 76: Line 100:
  
 
====System core architecture====
 
====System core architecture====
The SSI Authority Agent works as standalone Java EE application that runs different web services according to the RESTful API architecture principles. The application is built with the following tools:
+
The SSI Authority Agent includes several Docker containers necessary for successfull installment (HyperLedger Aries, CouchDB, Aries webhooks, REST API, etc.), where the Authority Agent REST API is the component responsible for the communication between the Evidence/eProcedure portal and the HL Aries agent. The API is implemented as a standalone Java EE application deployed as a WAR file to the Docker container. The application is built with the following tools:
 
*Maven
 
*Maven
 
*Java EE 16
 
*Java EE 16
 
====Third party libraries====
 
====Third party libraries====
TODO: As part of the bunch of libraries used by the Authority Agent, there are some of the related with the core features and which represent a starting point for the functionalities provided by the Authority Agent.
+
To achieve its functionality, the Authority Agent uses some external, third-party libraries explained in the folowing paragraphs.
 
=====Walt.ID library=====
 
=====Walt.ID library=====
The Walt.ID library is a set of shared utility functions used in the Authority Agent to perform common tasks that are required for a safe and interoperable data exchange. In the initial iteration the latest version of the TOOP Connector technical components were reused mainly for the usage of the built-in phase4 AS4 Gateway. Other elements of the TOOP Connector are currently ignored.
+
The Walt.ID library is an open-source library for implementing self-sovereign identity functionality. It comes with a set of shared utility functions, whereby the Authority Agent (AA) uses the functions necessary to interact with the EBSI registries through EBSI/eSSIF APIs (generating EBSI-compliant DID, onboarding the DID into the EBSI DID Registry, checking if the diploma issuer is registered in the EBSI Trusted Issuer Registry). The library is used both by the EBSI connector (component of the Authority Agent running on the AA REST API startup) as well as directly by the AA REST API during the diploma validation.
*Author: ''Walt.ID''
+
*Author: ''Walt.ID (recently open-sourced)''
*Repository:  
+
*Repository: [https://github.com/walt-id/waltid-ssikit]
 
=====Jackson =====
 
=====Jackson =====
Set of Java libraries to build Java web applications.
+
Set of Java libraries to parse JSON data when building Java web applications.
*Author:
+
*Author: open-source
*Repository:  
+
*Repository: [https://github.com/FasterXML/jackson]
 
====Data management====
 
====Data management====
 
To manage the model and the data stored by the SSI Authority Agent the following technologies are used:
 
To manage the model and the data stored by the SSI Authority Agent the following technologies are used:
 
*'''Ektorp:''' A Java Persistence API that used CouchDB as the underlying storage engine. It is used to persist data between Java objects and the CouchDB database.  
 
*'''Ektorp:''' A Java Persistence API that used CouchDB as the underlying storage engine. It is used to persist data between Java objects and the CouchDB database.  
====Utilities libraries====
 
TODO: The project uses several libraries and utilities to process and transform the data. They can be divided according to their nature:
 
*'''Commercial libraries'''
 
To perform common and non-business operations on web and data exchange projects, the Connector uses different commercial solutions, also all the libraries embedded in the Java development kit.
 
*'''In-house solutions'''
 
The Connector project includes some utilities that allow the data processing and internal tools to perform all the Connector tasks. Those utilities are within the Connector project as a module called ''de4a-commons.''
 
  
 
=== Edge Agent ===
 
=== Edge Agent ===
Line 109: Line 127:
  
 
====Installation====
 
====Installation====
//TODO: enter information from the WP5 Github.
+
The installation guidelines are available at https://github.com/de4a-wp5/ssi-authority-agent.
 
 
As a prerequisite to deploy the SSI Authority Agent is to have at least Java 16 and Apache Maven 3.6 or later installed.
 
 
 
You should be able to compile entire packages from the parent POM file:
 
 
 
mvn clean install
 
 
 
It is also possible to compile each package separately by browsing to the folder and running the command above.
 
=====Package=====
 
The compilation process will be packaging the project into a <code>.war</code> file located on <code>/target/</code> path, which should be deployable on any applications server. If you compile the parent pom, the IDK and Connector target paths will be created with their corresponding <code>war</code> files.
 
*'''de4a-commons'''
 
de4a-commons project is now on maven central OSS Sonatype repository
 
*'''Toop version v2.1.2-SNAPSHOT'''
 
Due to the lastest changes on de4a-commons Toop-connector-ng version should be <code>2.1.2-SNAPSHOT</code>, so you may need to add following repo server on your maven settings
 
 
 
https://oss.sonatype.org/content/repositories/snapshots/
 
 
====SSI Authority Agent configuration guide====
 
====SSI Authority Agent configuration guide====
 
For a correct configuration of the Connector, three main property files must be considered:
 
For a correct configuration of the Connector, three main property files must be considered:
*<code>application.properties</code>: main system configuration
+
*<code>.env</code>: main system configuration (Aries agent, public IP address and ports, CouchDB database)
*<code>phase4.properties</code>: AS4 gateway configurations
+
*<code>docker-compose.yml</code>: general script for deploying the SSI Authority Agent containers
*<code>log4j2.xml</code>: logging configuration
+
*<code>app.properties</code>: main configuration of the REST API i.e. web application (database credentials, EBSI bearer token, HL Aries agent public address and port)
Bellow, a working example of the <code>application.properties</code> file:<pre># Database properties
+
Bellow, a working example of the <code>app.properties</code> file:<pre>db.ip.address=http://couchdb.de4a.eu:5984/
database.datasourceConf.url=jdbc:h2:mem:testdb
+
db.username=<INSERT DB administrator username>
database.datasourceConf.driverClassName=org.h2.Driver
+
db.password=<INSERT DB administrator password>
database.datasourceConf.username=sa
+
db.name=<INSERT DB name>
database.datasourceConf.password=password
+
alias=<INSERT ORGANIZATION ALIAS NAME>
database.datasourceConf.initializationMode=always
+
aries.enterprise.ip.address=http://<INSERT_PUBLIC_DOMAIN_HERE>:8082/
database.datasourceConf.jpaHibernate.dialectPlatform=org.hibernate.dialect.H2Dialect
+
signature.type=Ed25519Signature2018
database.datasourceConf.jpaHibernate.ddlauto=create-drop
+
bearer.token=<INSERT session token>
database.datasourceConf.jpaHibernate.generateddl=true
 
database.datasourceConf.jpaHibernate.namingStrategy=org.hibernate.cfg.ImprovedNamingStrategy
 
database.datasourceConf.jpaHibernate.showSql=true
 
database.datasourceConf.jpaHibernate.formatSql=true
 
 
 
# H2 in-memory database console port (default 21080)
 
h2.console.port=21080
 
 
 
# i18n properties
 
spring.messages.basename=messages/messages
 
spring.messages.default_locale=en
 
 
 
# Spring allowing override beans
 
spring.main.allow-bean-definition-overriding=true
 
 
 
# Charset encoding
 
server.servlet.encoding.charset=UTF-8
 
server.servlet.encoding.enabled=true
 
server.servlet.encoding.force=true
 
 
 
# SSL context enabled (true|false)
 
ssl.context.enabled=false
 
 
 
# SSL configuration (optional when ssl.context.enabled is false, otherwise, it must be configured)
 
#ssl.keystore.type=
 
#ssl.keystore.path=
 
#ssl.keystore.password=
 
#ssl.truststore.path=
 
#ssl.truststore.password=
 
 
 
# Global flags for initializer
 
global.debug = true
 
global.production = false
 
 
 
# Instance name for logging
 
global.instancename = dev-from-ide
 
 
 
# DE4A Kafka settings
 
de4a.kafka.enabled=true
 
# Enables the standard logging separately of the Kafka messages. It is necessary for print metrics messages - (default: true)
 
de4a.kafka.logging.enabled=true
 
# Enables Kafka connection via HTTP (Only enable HTTP mode if outbound TCP connections are blocked from your internal network)
 
de4a.kafka.http.enabled=false
 
 
 
# Kafka server address (Eg.: de4a-dev-kafka.egovlab.eu:9092)
 
de4a.kafka.url=de4a-dev-kafka.egovlab.eu:9092
 
# Uncomment the following property and remove the above one if HTTP mode is enabled
 
# de4a.kafka.url=https://de4a-dev-kafka.egovlab.eu
 
 
 
# Establish a topic on kafka tracker - Pattern: de4a-<country-code>-<partner-name> - Eg.: de4a-se-egovlab - (default: de4a-connector)
 
de4a.kafka.topic=de4a-connector
 
 
 
# Logging metrics messages prefix - Default: DE4A METRICS
 
log.metrics.prefix=DE4A METRICS
 
 
 
# toop legacy kafka properties (Do not touch)
 
toop.tracker.enabled = false
 
 
 
# DSD base URL (Do not modify)
 
toop.dsd.service.baseurl = http://dsd.dev.exchange.toop.eu
 
 
 
# What AS4 implementation to use?
 
toop.mem.implementation = phase4
 
 
 
# Our AS4 sending AP endpoint (holodeck)
 
#toop.mem.as4.endpoint = http://localhost:8083/tc-webapp/as4
 
 
 
# Domibus server endpoint
 
# domibus.endpoint=
 
 
 
# SMP Client configuration stuff - Do not modify (default values)
 
smpclient.truststore.type = JKS
 
smpclient.truststore.path = truststore/de4a-truststore-test-smp-pw-de4a.jks
 
smpclient.truststore.password = de4a
 
 
 
# Spring As4 gateway implementation bean(provided: phase4GatewayClient and domibusGatewayClient).Implements eu.toop.as4.client.As4GatewayInterface
 
as4.gateway.implementation.bean=phase4GatewayClient
 
 
 
# External endpoints
 
# SMP endpoint Eg.: https://de4a-smp.egovlab.eu/
 
smp.endpoint=
 
# IDK endpoint Eg.: https://de4a-dev-idk.egovlab.eu/
 
idk.endpoint=
 
 
 
# IM response timeout
 
as4.timeout.miliseconds=30000
 
 
 
# Properties to create the http client connection through a proxy (optional)
 
#http.proxy.enabled=
 
#http.proxy.address=
 
#http.proxy.port=
 
#http.proxy.non-proxy=
 
#http.proxyUsername=
 
#http.proxyPassword=
 
 
 
# Required renamed proxy configuration for BDXRClient (if is needed, only uncomment)
 
#http.proxyHost=${http.proxy.address}
 
#http.proxyPort=${http.proxy.port}
 
#http.nonProxyHosts=${http.proxy.non-proxy}
 
 
</pre>From now on, we will explain the main and most critical configuration.
 
</pre>From now on, we will explain the main and most critical configuration.
 
=====Database properties=====
 
=====Database properties=====

Revision as of 11:16, 7 January 2022

Introduction

The SSI Agent infrastructure is established through the use of the SSI Authority and Edge agents. The SSI Authority Agent is an enterprise-level solution to be deployed on the premises of organizations that act as diploma Issuers (Data Providers) or Verifiers (Data Consumers), while the Edge Agent is a mobile solution, which can be used by the end users (in case of the SA pilot, students) to interact with the Authority Agent.

SSI Authority Agent

Functionalities provided

The main purpose of the SSI Authority Agent is to provide functionalities related to establishing a DID connection between the Hyperledger Aries agent deployed on the organization's premises and the user's Edge Agent as well as issuing the user's diploma as a Verifiable Credential (Data Provider) or request and validate the submitted diploma in the form of a Verifiable Presentation (Data Consumer). The Authority Agent also facilitates the communication with EBSI ledgers for storing the information about the trusted diploma issuers and their EBSI-compliant DIDs used for digitally signing the issued verifiable credentials and validating the issuers of submitted verifiable presentations.

Generate and issue an EBSI-compliant DID for the organization

In order to digitally sign verifiable credentials for the users, which can later be validated by the Verifier, the DID used for signing must be trustworthy and publicly available. To achieve this, the information about organizations listed as trusted diploma issuers and their DIDs is anchored to EBSI ledgers, where it can be accessed by calling the DID and Trusted Issuers Registry REST APIs. This information is produced on the Authority Agent startup by the underlying EBSI Connector component, which makes sure that the necessary keys are generated and imported to the cloud HL Aries agent, so that they can be used to sign the verifiable credentials. During the VP validation, the Authority Agent is then able to retrieve and resolve the DID information from the EBSI ledgers to validate the diploma issuer.

Establish DID connection between agents

The first step necessary in the diploma issuance/submission flow is to establish a secure connection between the Evidence Portal/eProcedure Portal and the user's Edge Agent (i.e. digital wallet). This is done by generating a QR code to be displayed on the portal side, which includes information about the DID invitation generated by the Authority Agent. The user can use his/her mobile application to scan the QR code and accept the DID invitation. Once this is done, a DID connection is established between the two agents (specifically, between the two HL Aries agents in the background). This step is a pre-condition needed to uniquely identify the two agents that will echange messages in the later flow.

Issue a Verifiable Credential

Once deployed on the Data Provider side, the Authority Agent supports the process of issuing a diploma in the form of a Verifiable Credential (VC) digitally signed with an EBSI-compliant DID of the Issuer. The VC information is retrieved from the received diploma evidence data in the canonical XML format. Sending the Verifiable Credential produced by the Authority Agent includes sending the VC offer for the user to preview the included data, followed by actually sending the Verifiable Credential once the offer is accepted.

Receive and validate a Verifiable Presentation

If deployed on the Data Consumer side, the Authority Agent enables organizations to request a diploma in the form of Verifiable Presentations from the students. In that case, a student can directly submit his/her diploma from the mobile wallet to the eProcedure Portal. Once received, the Portal can validate several aspects of the diploma validity: schema, digital signature, issuer and subject.

Supported interaction patterns

Interaction patterns define the flow of data through the Connector and the intercommunication between the different components. Each pattern exchanges certain types of messages, and the incoming/outgoing information will depend on the processes occurring in the external components [3].

The SSI Authority Agent currently supports the following interaction pattern:

  • Verifiable Credentials (VC) pattern
    • ­Synchronous communication between the SSI Authority and Edge Agent.
    • The Mediator component enables the correct routing between multiple Edge Agents (multiple users) and the Authority Agent deployed on DR or DT premises.
    • Since the interaction flow is managed by the user, the Data Requestor does not need to communicate directly with the Data Owner.

SSI Authority Agent roles

A SSI Authority Agent instance can play two different roles:

  • Data Requestor (DR)
  • Data Transferor (DT)

No configuration is needed to differentiate the roles, it only depends on the usage, i.e., the behaviour will be according to the messages sent.

Error handling

The Authority Agent includes methods monitoring the communication between the REST API and the Aries agent and internal database, and it records produced log messages into an internal log file for easier metric monitoring (the de4a-metrics-log.txt file is automatically created in the /usr/local/tomcat/logs in the AA API Docker container). During each API request, the Authority Agent records error messages to the log file along with the information about the component that generated the message, the internal code and description of the message.

Logging messages

Message types

The Authority Agent implements a custom DE4A Logger, which is responsible for producing a pre-defined format of the log message. The Logger provides the following types of messages:

  • Info
  • Error

Those basic message categories are used to record success or failure of individual operations executed within each API method call.

List of messages

The messages currently logged by the Authority Agent are as follows:

Services(Info level)

  • {0}: Received input eIDAS user data.
  • {0}: Received input userId data.
  • {0}: Generated DID invitation for edge agent.
  • {0}: Received input evidence data.
  • {0}: Signed a Verifiable Credential.
  • {0}: Sent a Verifiable Credential to the edge agent.
  • {0}: Accepted a submitted Verifiable Presentation.
  • {0}: Decoded input eIDAS user data.
  • {0}: Validated the digital signature of the submitted VP.
  • {0}: Validated the subject of the submitted VP.
  • {0}: Received HTTP response code: {1} from endpoint: {2}.
  • {0}: Processing the JSON response received from /{1}.
  • {0}: Stored current state in {1} internal database.
  • {0}: Received user {1} status data.
  • {0}: Converted input evidence in format: {1} to format: {2}.
  • {0}: Received response data PIID: {1}.
  • {0}: Found a {1} action match with PIID: {2}.
  • {0}: Found a Verifiable Presentation with name: {1}.
  • {0}: Found a Verifiable Presentation with ID: {1}.
  • {0}: Issuer DID has already been generated and registered in EBSI.
  • {0}: Successfully created files for EBSI integration.
  • {0}: Successfully generated key: {1}, value: {2}.
  • {0}: Successfully exported JWK private key.
  • {0}: Successfully imported DID document into Aries.

Errors(Error level)

The following list of error messages are recorded on the Communications, Internal failure and Configuration layers:

  • Connection error with {0} - {1}
  • Error on response from {0} - {1}
  • Arguments missing or invalid at {0} - {1}
  • Object conversion error on {0} - {1}
  • Error accessing/saving data on {0} - {1}
  • Error generating {0} key.
  • Error exporting JWK private key.
  • Error importing DID document into Aries.
  • Configuration error occurred on {0}.

[1] The {x} symbols are placeholders for dynamic text to be logged.

Data management

The Authority Agent stores and manages certain information about the DID connections with students' mobile wallets, VC/VP status (e.g. VC offer sent, accepted/rejected, VP request send, VP received, etc.) and its internal EBSI-compliant DID(s).

Technology used

SSI Authority Agent

System core architecture

The SSI Authority Agent includes several Docker containers necessary for successfull installment (HyperLedger Aries, CouchDB, Aries webhooks, REST API, etc.), where the Authority Agent REST API is the component responsible for the communication between the Evidence/eProcedure portal and the HL Aries agent. The API is implemented as a standalone Java EE application deployed as a WAR file to the Docker container. The application is built with the following tools:

  • Maven
  • Java EE 16

Third party libraries

To achieve its functionality, the Authority Agent uses some external, third-party libraries explained in the folowing paragraphs.

Walt.ID library

The Walt.ID library is an open-source library for implementing self-sovereign identity functionality. It comes with a set of shared utility functions, whereby the Authority Agent (AA) uses the functions necessary to interact with the EBSI registries through EBSI/eSSIF APIs (generating EBSI-compliant DID, onboarding the DID into the EBSI DID Registry, checking if the diploma issuer is registered in the EBSI Trusted Issuer Registry). The library is used both by the EBSI connector (component of the Authority Agent running on the AA REST API startup) as well as directly by the AA REST API during the diploma validation.

  • Author: Walt.ID (recently open-sourced)
  • Repository: [1]
Jackson

Set of Java libraries to parse JSON data when building Java web applications.

  • Author: open-source
  • Repository: [2]

Data management

To manage the model and the data stored by the SSI Authority Agent the following technologies are used:

  • Ektorp: A Java Persistence API that used CouchDB as the underlying storage engine. It is used to persist data between Java objects and the CouchDB database.

Edge Agent

System core architecture

The SSI Edge Agent works as standalone mobile device application that runs different components to implement SSI approach. The application is built with Android Studio using Kotlin language.

Installation and configuration

SSI Authority Agent

Installation

The installation guidelines are available at https://github.com/de4a-wp5/ssi-authority-agent.

SSI Authority Agent configuration guide

For a correct configuration of the Connector, three main property files must be considered:

  • .env: main system configuration (Aries agent, public IP address and ports, CouchDB database)
  • docker-compose.yml: general script for deploying the SSI Authority Agent containers
  • app.properties: main configuration of the REST API i.e. web application (database credentials, EBSI bearer token, HL Aries agent public address and port)

Bellow, a working example of the app.properties file:

db.ip.address=http://couchdb.de4a.eu:5984/
db.username=<INSERT DB administrator username>
db.password=<INSERT DB administrator password>
db.name=<INSERT DB name>
alias=<INSERT ORGANIZATION ALIAS NAME>
aries.enterprise.ip.address=http://<INSERT_PUBLIC_DOMAIN_HERE>:8082/
signature.type=Ed25519Signature2018
bearer.token=<INSERT session token>

From now on, we will explain the main and most critical configuration.

Database properties

Regarding database configuration and structure, the component creates an in-memory database through an H2 DB Engine, which will be created and deleted on each execution.

  • Datasource parameters
spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=password
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.datasource.initialization-mode=always
spring.jpa.hibernate.ddl-auto=create-drop
spring.jpa.generate-ddl=true

On the previous properties you also can specify any driver o connection configuration in order to stablish the connection to any database engine.

  • H2 in-memory database console

In order to access and manage information stored, until an external environment is created, the Connector expose H2 server engine console on the port defined by the property:

h2.console.port=21080

By default, even if you do not define the property (non-empty), port will be 21080, so you will be able to access through the following direction pattern:

http://<host-endpoint>:<portH2Console>

SSL Context (not for AS4) application.properties

You can configure secure HTTP connections from the Connector by setting the following property to true:

# SSL context enabled (true|false)
ssl.context.enabled=true

In this case you should properly configure the following properties in order to create an SSL context for HTTP communications:

  1. SSL configuration (optional when ssl.context.enables is false)

ssl.keystore.type= #(JKS|PKCS12) ssl.keystore.path= #(Path to keystore where signing private key are included) ssl.keystore.password= #(Private key password) ssl.truststore.path= #(JKS truststore) ssl.truststore.password= #(Truststore password)

In the case that you disabled the SSL context property, you should configure the corresponding JVM parameters to specify the truststore, keystore, etc. or the further actions depending of your environment configuration.

Starting up the SSI Authority Agent

Once you have all configuration parameters well configured (if not, check the logs to find out the problem), it is time to deploy the component into an applications server. Once you have deployed the war file or the docker image, there are several checks to ensure that the deployment was successful:

  • Open Swagger UI browsing: http://host:port/swagger-ui/

­     E.g.:

  • DE4A Connector index page will be at root path: http://host:port/

­     E.g.:

  • The Connector will be able to process requests through the following interfaces:

­    

  • Accessing to CouchDB database: http://host:h2.console.port/

Edge Agent

Installation

To install the Edge Agent, it is necessary to install the DE4A Mobile App in a mobile device.

Requirements

To install the DE4A Mobile app in a mobile device, these are the requirements needed:

  • Android Operating System installed (version android 9.0 or superior)
  • Recommended 2Gb RAM and 1Ghz processor
  • Fingerprint reader
Steps
  • Download The apk is available here: https://github.com/de4a-wp5/de4a-mobile-app
  • Set-up Once the app is downloaded, tap on the apk file to open it. The Android device will prompt for allowing apps from an unknown sources to be installed.
  • Allow apps from unknown source

The user has to tap on “Settings” button and the settings menu will appear with the following option for allowing the apps installation from this source, and to turn off this setting after the installation:

Install apps from unknown sources setting

User guide

The user manual can be found here: https://github.com/de4a-wp5/de4a-mobile-app/blob/master/DE4A%20Mobile%20App%20Manual%20v0.2.pdf