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201 changes: 201 additions & 0 deletions LICENSE
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107 changes: 107 additions & 0 deletions README.md
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<p align="center">
<img width="250" alt="pesd" src="https://user-images.githubusercontent.com/92733595/215836630-50bbb6cc-1623-4f78-a923-7ebb8db87608.png">
</p>


# PESD Exporter - Burp Suite Extension

Generate security-oriented sequence diagrams and fine-grained parsed traffic from Burp Suite Proxy history.

This extension is based on Proxy Enriched Sequence Diagrams format.

Discover the format [here](mds/Format.md) and read the introduction post in [doyensec blog](https://blog.doyensec.com/2023/02/14/pesd-extension-public-release.html).
<p align="center">
<img width="1000" alt="extension" src="https://github.com/doyensec/PESD-Exporter-Extension/blob/main/images/burptopesd.gif">
</p>
The exporter handles Burp Suite Proxy's traffic conversion to PESD format and offers the possibility to execute templates that will enrich the resulting exports.

## Extension UI
<p align="left">
<img width="550" alt="extension" src="https://user-images.githubusercontent.com/92733595/215848801-3cff0ba6-cab8-4f0f-8cdc-6441ba83c9cc.png">
</p>

- Select and send specific traffic entries from Burp Suite Tabs to the Exporter tab

- Specify a mode of operation for the export. Supported modes :
- ***Domains as Actors*** - Each domain involved in the traffic is represented as an actor in the diagram. Suitable for multi-domain flows analysis
- ***Endpoints as Actors*** - Each endpoint (path) involved in the traffic is represented as an actor in the diagram. Suitable for single-domain flows analysis

- Configure the flags set that will be matched in the generation of the sequence diagram. Read about flags in the format definition page, section ["Base Diagram Syntaxes" ](mds/Format.md#flags)

- Select the templates that will be executed on the resulting export. Read more about templates in the following section

- Auto-Export. Checked by default, sending items to the extension will directly result in a export.
User is redirected to the Browser view and the items are cleaned after the export within the extension

## Export Capabilities


<p align="center">
<img width="600" alt="extension" src="https://github.com/doyensec/PESD-Exporter-Extension/blob/main/images/export.gif">
</p>

- **Expandable Metadata**. Underlined flags can be clicked to show the underlying metadata from the traffic in a scrollable popover

- **Masked Randoms in URL Paths**. UUIDs and pseudorandom strings recognized inside path segments are mapped to variable names `<UUID_N>` / `<VAR_N>`. The re-renderization will reshape the diagram to improve flow readability. Every occurrency with the same value maintains the same name

- **Notes**. Comments from Burp Suite are converted to notes in the resulting diagram. Use `<br>` in Burp Suite comments to obtain multi-line notes in PESD exports

- **Save as** :
- Sequence Diagram in `SVG` format
- `Markdown` file (MermaidJS syntax),
- Traffic `metadata` in `JSON` format. Read about the metadata structure in the format definition page, ["exports section"](https://github.com/doyensec/PESD-Exporter-Extension/blob/main/mds/Format.md#exports)

## Extending the diagram, syntax and metadata with Templates

By default, a generic diagram follows the basic [PESD syntax ](mds/Format.md#base-diagram-syntaxes).
PESD Exporter supports syntax and metadata extension via templates execution.

#### What is a Template?
Templates are iterations that occur on the basic PESD object in order to enrich its content by:
- Adding new Flags or modifying existing ones
- Framing sections of the resulting diagram. Read about [MermaidJS Alt Syntax](https://mermaid-js.github.io/mermaid/#/sequenceDiagram?id=alt).
- Enriching the metadata with new findings

***Approach Idea :*** Users can leverage this extensibility to parse metadata and markdown in order to add new value in both of them by adding new logic.

#### Currently Implemented Templates

The Extension currently supports the following templates :
- **OAuth2 / OpenID Connect.** The template matches standard OAuth2/OpenID Connect flows and adds related flags + flow frame.
Oauth2 supported flows : Implicit Grant and Code Grant. OpenID supported flows : Code Grant, Implicit Grant and Hybrid flow.
Respectively based on [rfc6749](https://datatracker.ietf.org/doc/html/rfc6749) and [openid-connect-core-1_0](https://openid.net/specs/openid-connect-core-1_0.html)

- **SAML SSO**. The template matches Single-Sign-On flows with SAML V2.0 and adds related flags + flow frame.
Based on [SAML V2.0 ](http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-tech-overview-2.0-cd-02.html#5.1.Web%20Browser%20SSO%20Profile|outline), supported flows:
- SP-initiated SSO using a Redirect Binding for the SP-to-IdP <AuthnRequest> message and a POST Binding for the IdP-to-SP <Response> message
- SP-initiated SSO using a POST Binding for the <AuthnRequest> message and an Artifact Binding for the <Response> message
- IDP-initiated SSO using a POST Binding for the IdP-to-SP <Response> message; no SP-to-IdP <AuthnRequest> message is involved.

Template matching example for *SAML SP-initiated SSO with redirect POST*:
<p align="left">

<img width="550" alt="samlex" src="https://user-images.githubusercontent.com/92733595/218618497-a9c98b26-ed31-442d-8de7-a15fc3a8ec96.png">
</p>


#### Development

- Clone the repository
- Import it in Netbeans / your preferred IDE
- Run **gradle build fatjar** to compile the extension
- Import the compiled JAR in `build/libs/pesd-exporter-all.jar`

#### How to write new templates

Find the [template implementation guide](mds/WritingTemplates.md).

## Credits

*Author and Maintainer:* Francesco Lacerenza ([@lacerenza_fra](https://twitter.com/lacerenza_fra))

This project was made with love in the [Doyensec Research island](https://doyensec.com/research.html) during the [internship with 50% research time](https://blog.doyensec.com/2019/11/05/internship-at-doyensec.html).



![alt text](https://doyensec.com/images/logo.svg "Doyensec Logo")
35 changes: 35 additions & 0 deletions build.gradle
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apply plugin: 'java'

repositories {
mavenCentral()
}

dependencies {
implementation 'net.portswigger.burp.extender:burp-extender-api:2.3'
implementation 'org.apache.commons:commons-lang3:3.5'
implementation group: 'org.apache.commons', name: 'commons-collections4', version: '4.1'
implementation group: 'org.json', name: 'json', version: '20210307'
}

sourceSets {
main {
java {
srcDir 'src'
}
resources {
srcDir 'resources'
}
}
}

task fatJar(type: Jar) {
duplicatesStrategy = DuplicatesStrategy.INCLUDE
baseName = project.name + '-all'
from { configurations.compileClasspath.collect { it.isDirectory() ? it : zipTree(it) } }
with jar
}

compileJava {
targetCompatibility '1.8'
sourceCompatibility '1.8'
}
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5 changes: 5 additions & 0 deletions gradle/wrapper/gradle-wrapper.properties
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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
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