diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c167f4f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+go.sum
+certgraph
+build/
+*.json
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..23cb790
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
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+the GNU Lesser General Public License instead.) You can apply it to
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+
+ When we speak of free software, we are referring to freedom, not
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+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+Activities other than copying, distribution and modification are not
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+ 1. You may copy and distribute verbatim copies of the Program's
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+You may charge a fee for the physical act of transferring a copy, and
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+These requirements apply to the modified work as a whole. If
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+ 4. You may not copy, modify, sublicense, or distribute the Program
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+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
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+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
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+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
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+
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+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
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+Foundation.
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+ 10. If you wish to incorporate parts of the Program into other free
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+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ {description}
+ Copyright (C) {year} {fullname}
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ {signature of Ty Coon}, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..178312e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,39 @@
+GIT_DATE := $(shell git log -1 --date=short --pretty='%cd' | tr -d -)
+GIT_HASH := $(shell git rev-parse HEAD)
+
+BUILD_FLAGS := -ldflags "-X main.gitDate=$(GIT_DATE) -X main.gitHash=$(GIT_HASH)"
+
+PLATFORMS := linux/amd64 linux/386 linux/arm darwin/amd64 windows/amd64 windows/386 openbsd/amd64
+SOURCES := $(shell find . -maxdepth 1 -type f -name "*.go")
+ALL_SOURCES = $(shell find . -type f -name '*.go')
+
+temp = $(subst /, ,$@)
+os = $(word 1, $(temp))
+arch = $(word 2, $(temp))
+ext = $(shell if [ "$(os)" = "windows" ]; then echo ".exe"; fi)
+
+.PHONY: all release fmt clean serv $(PLATFORMS)
+
+all: certgraph
+
+release: $(PLATFORMS)
+ rm -r build/bin/
+
+certgraph: $(SOURCES) $(ALL_SOURCES)
+ go build $(BUILD_FLAGS) -o $@ $(SOURCES)
+
+$(PLATFORMS): $(SOURCES)
+ CGO_ENABLED=0 GOOS=$(os) GOARCH=$(arch) go build $(BUILD_FLAGS) -o 'build/bin/$(os)/$(arch)/certgraph$(ext)' $(SOURCES)
+ mkdir -p build/$(GIT_DATE)/; cd build/bin/$(os)/$(arch)/; zip -r ../../../$(GIT_DATE)/certgraph-$(os)-$(arch)-$(GIT_DATE).zip .; cd ../../../
+
+fmt:
+ gofmt -s -w -l .
+
+install: $(SOURCES) $(ALL_SOURCES)
+ go install $(BUILD_FLAGS)
+
+clean:
+ rm -r certgraph build/
+
+serv:
+ (cd docs; python -m SimpleHTTPServer)
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e83f643
--- /dev/null
+++ b/README.md
@@ -0,0 +1,113 @@
+# CertGraph
+### A tool to crawl the graph of certificate Alternate Names
+
+CertGraph crawls SSL certificates creating a directed graph where each domain is a node and the certificate alternative names for that domain's certificate are the edges to other domain nodes. New domains are printed as they are found. In Detailed mode upon completion the Graph's adjacency list is printed.
+
+Crawling defaults to collecting certificate by connecting over TCP, however there are multiple drivers that can search [Certificate Transparency](https://www.certificate-transparency.org/) logs.
+
+This tool was designed to be used for host name enumeration via SSL certificates, but it can also show you a "chain" of trust between domains and the certificates that re-used between them.
+
+[Blog post with more information](https://lanrat.com/certgraph/)
+
+## Usage
+```
+Usage of ./certgraph: [OPTION]... HOST...
+ https://github.com/lanrat/certgraph
+OPTIONS:
+ -cdn
+ include certificates from CDNs
+ -ct-expired
+ include expired certificates in certificate transparency search
+ -ct-subdomains
+ include sub-domains in certificate transparency search
+ -depth uint
+ maximum BFS depth to go (default 5)
+ -details
+ print details about the domains crawled
+ -driver string
+ driver to use [crtsh, google, http, smtp] (default "http")
+ -json
+ print the graph as json, can be used for graph in web UI
+ -ns
+ check for NS records to determine if domain is registered
+ -parallel uint
+ number of certificates to retrieve in parallel (default 10)
+ -sanscap int
+ maximum number of uniq TLD+1 domains in certificate to include, 0 has no limit (default 80)
+ -save string
+ save certs to folder in PEM format
+ -timeout uint
+ tcp timeout in seconds (default 10)
+ -tldplus1
+ for every domain found, add tldPlus1 of the domain's parent
+ -verbose
+ verbose logging
+ -version
+ print version and exit
+```
+
+## Drivers
+
+CertGraph has multiple options for querying SSL certificates. The driver is responsible for retrieving the certificates for a given domain. Currently there are the following drivers:
+
+ * **http** this is the default driver which works by connecting to the hosts over HTTPS and retrieving the certificates from the SSL connection
+
+ * **smtp** like the *http* driver, but connects over port 25 and issues the *starttls* command to retrieve the certificates from the SSL connection
+
+ * **crtsh** this driver searches Certificate Transparency logs via [crt.sh](https://crt.sh/). No packets are sent to any of the domains when using this driver
+
+ * **google** this is another Certificate Transparency driver that behaves like *crtsh* but uses the [Google Certificate Transparency Lookup Tool](https://transparencyreport.google.com/https/certificates)
+
+
+## Example
+```
+$ ./certgraph -details eff.org
+eff.org 0 Good 42E3E4605D8BB4608EB64936E2176A98B97EBF2E0F8F93A64A6640713C7D4325
+maps.eff.org 1 Good 42E3E4605D8BB4608EB64936E2176A98B97EBF2E0F8F93A64A6640713C7D4325
+https-everywhere-atlas.eff.org 1 Good 42E3E4605D8BB4608EB64936E2176A98B97EBF2E0F8F93A64A6640713C7D4325
+httpse-atlas.eff.org 1 Good 42E3E4605D8BB4608EB64936E2176A98B97EBF2E0F8F93A64A6640713C7D4325
+atlas.eff.org 1 Good 42E3E4605D8BB4608EB64936E2176A98B97EBF2E0F8F93A64A6640713C7D4325
+kittens.eff.org 1 Good 42E3E4605D8BB4608EB64936E2176A98B97EBF2E0F8F93A64A6640713C7D4325
+```
+The above output represents the adjacency list for the graph for the root domain `eff.org`. The adjacency list is in the form:
+`Node Depth Status Cert-Fingerprint`
+
+## [Releases](https://github.com/lanrat/certgraph/releases)
+
+Precompiled releases will occasionally be uploaded to the [releases github page](https://github.com/lanrat/certgraph/releases). https://github.com/lanrat/certgraph/releases
+
+Also available in [BlackArch](https://blackarch.org).
+
+## Compiling
+
+To compile certgraph you must have a working go 1.11 or newer compiler on your system, as certgraph makes use of go's modules for dependencies.
+To compile for the running system compilation is as easy as running make
+```
+certgraph$ make
+go build -o certgraph certgraph.go
+```
+
+Alternatively you can use `go get` to install with this one-liner:
+```
+go get -u github.com/lanrat/certgraph
+```
+
+## [Web UI](https://lanrat.github.io/certgraph/)
+
+A web UI is provided in the docs folder and is accessible at the github pages url [https://lanrat.github.io/certgraph/](https://lanrat.github.io/certgraph/).
+
+The web UI takes the output provided with the `-json` flag.
+The JSON graph can be sent to the web interface as an uploaded file, remote URL, or as the query string using the data variable.
+
+### [Example 1: eff.org](https://lanrat.github.io/certgraph/?data=https://gist.githubusercontent.com/lanrat/8187d01793bf3e578d76495182654206/raw/c49741b5206d81935febdf563452cc4346381e52/eff.json)
+
+[](https://lanrat.github.io/certgraph/?data=https://gist.githubusercontent.com/lanrat/8187d01793bf3e578d76495182654206/raw/c49741b5206d81935febdf563452cc4346381e52/eff.json)
+
+### [Example 2: google.com](https://lanrat.github.io/certgraph/?data=https://gist.githubusercontent.com/lanrat/1ab1e78aaf5798049650d8d8ad7b58a1/raw/426d3a2498626014cb5ba2856ad0899787e4103f/google.json)
+
+[](https://lanrat.github.io/certgraph/?data=https://gist.githubusercontent.com/lanrat/1ab1e78aaf5798049650d8d8ad7b58a1/raw/426d3a2498626014cb5ba2856ad0899787e4103f/google.json)
+
+### [Example 3: whitehouse.gov](https://lanrat.github.io/certgraph/?data=https://gist.githubusercontent.com/lanrat/96c47dfee0faaaad633cc830b7e3b997/raw/3c79fed837cb3202e220de21d2a8eb128f4bbd9f/whitehouse.json)
+
+[](https://lanrat.github.io/certgraph/?data=https://gist.githubusercontent.com/lanrat/96c47dfee0faaaad633cc830b7e3b997/raw/3c79fed837cb3202e220de21d2a8eb128f4bbd9f/whitehouse.json)
+
diff --git a/certgraph.go b/certgraph.go
new file mode 100644
index 0000000..f45d0ce
--- /dev/null
+++ b/certgraph.go
@@ -0,0 +1,411 @@
+package main
+
+import (
+ "encoding/json"
+ "flag"
+ "fmt"
+ "net/url"
+ "os"
+ "strings"
+ "sync"
+ "time"
+
+ "github.com/lanrat/certgraph/dns"
+ "github.com/lanrat/certgraph/driver"
+ "github.com/lanrat/certgraph/driver/crtsh"
+ "github.com/lanrat/certgraph/driver/google"
+ "github.com/lanrat/certgraph/driver/http"
+ "github.com/lanrat/certgraph/driver/smtp"
+ "github.com/lanrat/certgraph/graph"
+)
+
+var (
+ gitDate = "none"
+ gitHash = "master"
+ certGraph = graph.NewCertGraph()
+)
+
+var certDriver driver.Driver
+
+// config & flags
+var config struct {
+ timeout time.Duration
+ verbose bool
+ maxDepth uint
+ parallel uint
+ savePath string
+ details bool
+ printJSON bool
+ driver string
+ includeCTSubdomains bool
+ includeCTExpired bool
+ cdn bool
+ maxSANsSize int
+ tldPlus1 bool
+ updatePSL bool
+ checkDNS bool
+ printVersion bool
+}
+
+func init() {
+ var timeoutSeconds uint
+ flag.BoolVar(&config.printVersion, "version", false, "print version and exit")
+ flag.UintVar(&timeoutSeconds, "timeout", 10, "tcp timeout in seconds")
+ flag.BoolVar(&config.verbose, "verbose", false, "verbose logging")
+ flag.StringVar(&config.driver, "driver", "http", fmt.Sprintf("driver to use [%s]", strings.Join(driver.Drivers, ", ")))
+ flag.BoolVar(&config.includeCTSubdomains, "ct-subdomains", false, "include sub-domains in certificate transparency search")
+ flag.BoolVar(&config.includeCTExpired, "ct-expired", false, "include expired certificates in certificate transparency search")
+ flag.IntVar(&config.maxSANsSize, "sanscap", 80, "maximum number of uniq TLD+1 domains in certificate to include, 0 has no limit")
+ flag.BoolVar(&config.cdn, "cdn", false, "include certificates from CDNs")
+ flag.BoolVar(&config.checkDNS, "dns", false, "check for DNS records to determine if domain is registered")
+ flag.BoolVar(&config.tldPlus1, "tldplus1", false, "for every domain found, add tldPlus1 of the domain's parent")
+ flag.BoolVar(&config.updatePSL, "updatepsl", false, "Update the default Public Suffix List")
+ flag.UintVar(&config.maxDepth, "depth", 5, "maximum BFS depth to go")
+ flag.UintVar(&config.parallel, "parallel", 10, "number of certificates to retrieve in parallel")
+ flag.BoolVar(&config.details, "details", false, "print details about the domains crawled")
+ flag.BoolVar(&config.printJSON, "json", false, "print the graph as json, can be used for graph in web UI")
+ flag.StringVar(&config.savePath, "save", "", "save certs to folder in PEM format")
+ flag.Usage = func() {
+ fmt.Fprintf(os.Stderr, "Usage of %s: [OPTION]... HOST...\n\thttps://github.com/lanrat/certgraph\nOPTIONS:\n", os.Args[0])
+ flag.PrintDefaults()
+ }
+ flag.Parse()
+ config.timeout = time.Duration(timeoutSeconds) * time.Second
+}
+
+func main() {
+ // check for version flag
+ if config.printVersion {
+ fmt.Println(version())
+ return
+ }
+
+ // print usage if no domain passed
+ if flag.NArg() < 1 {
+ flag.Usage()
+ return
+ }
+
+ // cant run on 0 threads
+ if config.parallel < 1 {
+ fmt.Fprintln(os.Stderr, "Must enter a positive number of parallel threads")
+ flag.Usage()
+ return
+ }
+
+ // update the public suffix list if required
+ if config.updatePSL {
+ err := dns.UpdatePublicSuffixList(config.timeout)
+ if err != nil {
+ e(err)
+ return
+ }
+ }
+
+ // add domains passed to startDomains
+ startDomains := make([]string, 0, 1)
+ for _, domain := range flag.Args() {
+ d := strings.ToLower(domain)
+ if len(d) > 0 {
+ startDomains = append(startDomains, cleanInput(d))
+ if config.tldPlus1 {
+ tldPlus1, err := dns.TLDPlus1(domain)
+ if err != nil {
+ continue
+ }
+ startDomains = append(startDomains, tldPlus1)
+ }
+ }
+ }
+
+ // set driver
+ err := setDriver(config.driver)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ return
+ }
+
+ // create the output directory if it does not exist
+ if len(config.savePath) > 0 {
+ err := os.MkdirAll(config.savePath, 0777)
+ if err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ return
+ }
+ }
+
+ // perform breath-first-search on the graph
+ breathFirstSearch(startDomains)
+
+ // print the json output
+ if config.printJSON {
+ printJSONGraph()
+ }
+
+ v("Found", certGraph.NumDomains(), "domains")
+ v("Graph Depth:", certGraph.DomainDepth())
+}
+
+// setDriver sets the driver variable for the provided driver string and does any necessary driver prep work
+// TODO make config generic and move this to driver module
+func setDriver(driver string) error {
+ var err error
+ switch driver {
+ case "google":
+ certDriver, err = google.Driver(50, config.savePath, config.includeCTSubdomains, config.includeCTExpired)
+ case "crtsh":
+ certDriver, err = crtsh.Driver(1000, config.timeout, config.savePath, config.includeCTSubdomains, config.includeCTExpired)
+ case "http":
+ certDriver, err = http.Driver(config.timeout, config.savePath)
+ case "smtp":
+ certDriver, err = smtp.Driver(config.timeout, config.savePath)
+ default:
+ return fmt.Errorf("Unknown driver name: %s", config.driver)
+ }
+ return err
+}
+
+// verbose logging
+func v(a ...interface{}) {
+ if config.verbose {
+ e(a...)
+ }
+}
+
+func e(a ...interface{}) {
+ if a != nil {
+ fmt.Fprintln(os.Stderr, a...)
+ }
+}
+
+// prints the graph as a json object
+func printJSONGraph() {
+ jsonGraph := certGraph.GenerateMap()
+ jsonGraph["certgraph"] = generateGraphMetadata()
+
+ j, err := json.MarshalIndent(jsonGraph, "", "\t")
+ if err != nil {
+ fmt.Println(err)
+ return
+ }
+ fmt.Println(string(j))
+}
+
+// breathFirstSearch perform Breadth first search to build the graph
+func breathFirstSearch(roots []string) {
+ var wg sync.WaitGroup
+ domainNodeInputChan := make(chan *graph.DomainNode, 5) // input queue
+ domainNodeOutputChan := make(chan *graph.DomainNode, 5) // output queue
+
+ // thread limit code
+ threadPass := make(chan bool, config.parallel)
+ for i := uint(0); i < config.parallel; i++ {
+ threadPass <- true
+ }
+
+ // thread to put root nodes/domains into queue
+ wg.Add(1)
+ go func() {
+ // the waitGroup Add and Done for this thread ensures that we don't exit before any of the inputs domains are put into the Queue
+ defer wg.Done()
+ for _, root := range roots {
+ wg.Add(1)
+ n := graph.NewDomainNode(root, 0)
+ n.Root = true
+ domainNodeInputChan <- n
+ }
+ }()
+ // thread to start all other threads from DomainChan
+ go func() {
+ for {
+ domainNode := <-domainNodeInputChan
+
+ // depth check
+ if domainNode.Depth > config.maxDepth {
+ v("Max depth reached, skipping:", domainNode.Domain)
+ wg.Done()
+ continue
+ }
+ // use certGraph.domains map as list of
+ // domains that are queued to be visited, or already have been
+
+ if _, found := certGraph.GetDomain(domainNode.Domain); !found {
+ certGraph.AddDomain(domainNode)
+ go func(domainNode *graph.DomainNode) {
+ defer wg.Done()
+ // wait for pass
+ <-threadPass
+ defer func() { threadPass <- true }()
+
+ // operate on the node
+ v("Visiting", domainNode.Depth, domainNode.Domain)
+ visit(domainNode)
+ domainNodeOutputChan <- domainNode
+ for _, neighbor := range certGraph.GetDomainNeighbors(domainNode.Domain, config.cdn, config.maxSANsSize) {
+ wg.Add(1)
+ domainNodeInputChan <- graph.NewDomainNode(neighbor, domainNode.Depth+1)
+ if config.tldPlus1 {
+ tldPlus1, err := dns.TLDPlus1(neighbor)
+ if err != nil {
+ continue
+ }
+ wg.Add(1)
+ domainNodeInputChan <- graph.NewDomainNode(tldPlus1, domainNode.Depth+1)
+ }
+ }
+ }(domainNode)
+ } else {
+ wg.Done()
+ }
+ }
+ }()
+
+ // save/output thread
+ done := make(chan bool)
+ go func() {
+ for {
+ domainNode, more := <-domainNodeOutputChan
+ if more {
+ if !config.printJSON {
+ printNode(domainNode)
+ } else if config.details {
+ fmt.Fprintln(os.Stderr, domainNode)
+ }
+ } else {
+ done <- true
+ return
+ }
+ }
+ }()
+
+ wg.Wait() // wait for querying to finish
+ close(domainNodeOutputChan)
+ <-done // wait for save to finish
+}
+
+// visit visits each node and get and set its neighbors
+func visit(domainNode *graph.DomainNode) {
+ // check NS if necessary
+ if config.checkDNS {
+ _, err := domainNode.CheckForDNS(config.timeout)
+ if err != nil {
+ v("CheckForNS", err)
+ }
+ }
+
+ // perform cert search
+ // TODO do pagination in multiple threads to not block on long searches
+ results, err := certDriver.QueryDomain(domainNode.Domain)
+ if err != nil {
+ // this is VERY common to error, usually this is a DNS or tcp connection related issue
+ // we will skip the domain if we can't query it
+ v("QueryDomain", domainNode.Domain, err)
+ return
+ }
+ statuses := results.GetStatus()
+ domainNode.AddStatusMap(statuses)
+ relatedDomains, err := results.GetRelated()
+ if err != nil {
+ v("GetRelated", domainNode.Domain, err)
+ return
+ }
+ domainNode.AddRelatedDomains(relatedDomains)
+
+ // TODO parallelize this
+ // TODO fix printing domains as they are found with new driver
+ // add cert nodes to graph
+ fingerprintMap, err := results.GetFingerprints()
+ if err != nil {
+ v("GetFingerprints", err)
+ return
+ }
+
+ // fingerprints for the domain queried
+ fingerprints := fingerprintMap[domainNode.Domain]
+ for _, fp := range fingerprints {
+ // add certnode to graph
+ certNode, exists := certGraph.GetCert(fp)
+ if !exists {
+ // get cert details
+ certResult, err := results.QueryCert(fp)
+ if err != nil {
+ v("QueryCert", err)
+ continue
+ }
+
+ certNode = certNodeFromCertResult(certResult)
+ certGraph.AddCert(certNode)
+ }
+
+ certNode.AddFound(certDriver.GetName())
+ domainNode.AddCertFingerprint(certNode.Fingerprint, certDriver.GetName())
+ }
+
+ // we dont process any other certificates returned, they will be collected
+ // when we process the related domains
+}
+
+func printNode(domainNode *graph.DomainNode) {
+ if config.details {
+ fmt.Fprintln(os.Stdout, domainNode)
+ } else {
+ fmt.Fprintln(os.Stdout, domainNode.Domain)
+ }
+ if config.checkDNS && !domainNode.HasDNS {
+ // TODO print this in a better way
+ // TODO for debugging
+ realDomain, _ := dns.TLDPlus1(domainNode.Domain)
+ fmt.Fprintf(os.Stdout, "* Missing DNS for: %s\n", realDomain)
+
+ }
+}
+
+// certNodeFromCertResult convert certResult to certNode
+func certNodeFromCertResult(certResult *driver.CertResult) *graph.CertNode {
+ certNode := &graph.CertNode{
+ Fingerprint: certResult.Fingerprint,
+ Domains: certResult.Domains,
+ }
+ return certNode
+}
+
+// generates metadata for the JSON output
+// TODO map all config json
+func generateGraphMetadata() map[string]interface{} {
+ data := make(map[string]interface{})
+ data["version"] = version()
+ data["website"] = "https://lanrat.github.io/certgraph/"
+ data["scan_date"] = time.Now().UTC()
+ data["command"] = strings.Join(os.Args, " ")
+ options := make(map[string]interface{})
+ options["parallel"] = config.parallel
+ options["driver"] = config.driver
+ options["ct_subdomains"] = config.includeCTSubdomains
+ options["ct_expired"] = config.includeCTExpired
+ options["sanscap"] = config.maxSANsSize
+ options["cdn"] = config.cdn
+ options["timeout"] = config.timeout
+ data["options"] = options
+ return data
+}
+
+// returns the version string
+func version() string {
+ return fmt.Sprintf("Git commit: %s [%s]", gitDate, gitHash)
+}
+
+// cleanInput attempts to parse the input string as a url to extract the hostname
+// if it fails, then the input string is returned
+// also removes tailing '.'
+func cleanInput(host string) string {
+ host = strings.TrimSuffix(host, ".")
+ u, err := url.Parse(host)
+ if err != nil {
+ return host
+ }
+ hostname := u.Hostname()
+ if hostname == "" {
+ return host
+ }
+ return hostname
+}
diff --git a/dns/ns.go b/dns/ns.go
new file mode 100644
index 0000000..5cd2635
--- /dev/null
+++ b/dns/ns.go
@@ -0,0 +1,87 @@
+package dns
+
+import (
+ "context"
+ "net"
+ "time"
+)
+
+var (
+ dnsCache = make(map[string]bool)
+ dnsResolver = &net.Resolver{}
+)
+
+func init() {
+ //dnsResolver.PreferGo = true
+ dnsResolver.StrictErrors = false
+}
+
+func noSuchHostDNSError(err error) bool {
+ dnsErr, ok := err.(*net.DNSError)
+ if !ok {
+ // not a DNSError
+ return false
+ }
+ return dnsErr.Err == "no such host"
+}
+
+// HasRecords does NS, CNAME, A, and AAAA lookups with a timeout
+// returns error when no NS found, does not use TLDPlus1
+func HasRecords(domain string, timeout time.Duration) (bool, error) {
+ ctx, cancel := context.WithTimeout(context.Background(), timeout)
+ defer cancel()
+
+ // first check for NS
+ ns, err := dnsResolver.LookupNS(ctx, domain)
+ if err != nil && !noSuchHostDNSError(err) {
+ //fmt.Println("NS error ", err)
+ return false, err
+ }
+ if len(ns) > 0 {
+ //fmt.Printf("Found %d NS for %s\n", len(ns), domain)
+ return true, nil
+ }
+
+ // next check for CNAME
+ cname, err := dnsResolver.LookupCNAME(ctx, domain)
+ if err != nil && !noSuchHostDNSError(err) {
+ //fmt.Println("cname error ", err)
+ return false, err
+ }
+ if len(cname) > 2 {
+ //fmt.Printf("found CNAME %s for %s\n", cname, domain)
+ return true, nil
+ }
+
+ // next check for IP
+ addrs, err := dnsResolver.LookupHost(ctx, domain)
+ if err != nil && !noSuchHostDNSError(err) {
+ //fmt.Println("ip error ", err)
+ return false, err
+ }
+ if len(addrs) > 0 {
+ //fmt.Printf("Found %d IPs for %s\n", len(addrs), domain)
+ return true, nil
+ }
+
+ //fmt.Printf("Found no DNS records for %s\n", domain)
+ return false, nil
+}
+
+// HasRecordsCache returns true if the domain has no DNS records (at the tldplus1 level)
+// uses a cache to store results to prevent lots of DNS lookups
+func HasRecordsCache(domain string, timeout time.Duration) (bool, error) {
+ domain, err := TLDPlus1(domain)
+ if err != nil {
+ return false, err
+ }
+ hasDNS, found := dnsCache[domain]
+ if found {
+ return hasDNS, nil
+ }
+ hasRecords, err := HasRecords(domain, timeout)
+ if err != nil {
+ dnsCache[domain] = hasRecords
+ }
+ return hasRecords, err
+}
diff --git a/dns/publicsuffix.go b/dns/publicsuffix.go
new file mode 100644
index 0000000..86c9ef3
--- /dev/null
+++ b/dns/publicsuffix.go
@@ -0,0 +1,42 @@
+package dns
+
+import (
+ "net/http"
+ "time"
+
+ "github.com/weppos/publicsuffix-go/publicsuffix"
+)
+
+var (
+ suffixListFindOptions = &publicsuffix.FindOptions{
+ IgnorePrivate: true,
+ DefaultRule: publicsuffix.DefaultRule,
+ }
+ suffixListURL = "https://publicsuffix.org/list/public_suffix_list.dat"
+ suffixList = publicsuffix.DefaultList
+ nsCache = make(map[string]bool)
+)
+
+// UpdatePublicSuffixList gets a new copy of the public suffix list from the internat and updates the built in copy with the new rules
+func UpdatePublicSuffixList(timeout time.Duration) error {
+ suffixListParseOptions := &publicsuffix.ParserOption{
+ PrivateDomains: !suffixListFindOptions.IgnorePrivate,
+ }
+ client := http.Client{
+ Timeout: timeout,
+ }
+ resp, err := client.Get(suffixListURL)
+ if err != nil {
+ return err
+ }
+ defer resp.Body.Close()
+ newSuffixList := publicsuffix.NewList()
+ newSuffixList.Load(resp.Body, suffixListParseOptions)
+ suffixList = newSuffixList
+ return err
+}
+
+// TLDPlus1 returns TLD+1 of domain
+func TLDPlus1(domain string) (string, error) {
+ return publicsuffix.DomainFromListWithOptions(suffixList, domain, suffixListFindOptions)
+}
diff --git a/docs/index.html b/docs/index.html
new file mode 100644
index 0000000..c227b54
--- /dev/null
+++ b/docs/index.html
@@ -0,0 +1,523 @@
+
+
+
+
+
+
+CertGraph
+
+
+
+
+
+