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.DS_Store
.idea

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# Default ignored files
/shelf/
/workspace.xml
# Editor-based HTTP Client requests
/httpRequests/
# Datasource local storage ignored files
/dataSources/
/dataSources.local.xml

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<?xml version="1.0" encoding="UTF-8"?>
<module type="WEB_MODULE" version="4">
<component name="Go" enabled="true" />
<component name="NewModuleRootManager">
<content url="file://$MODULE_DIR$" />
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/.idea/beelzebub.iml" filepath="$PROJECT_DIR$/.idea/beelzebub.iml" />
</modules>
</component>
</project>

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="$PROJECT_DIR$" vcs="Git" />
</component>
</project>

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FROM golang:alpine AS builder
ENV GO111MODULE=on \
CGO_ENABLED=0 \
GOOS=linux \
GOARCH=amd64
RUN apk add git
WORKDIR /build
# Copy and download dependency using go mod
COPY go.mod .
COPY go.sum .
RUN go mod download
# Copy the code into the container
COPY . .
COPY ./configurations /dist/configurations
# Build the application
RUN go build -o main .
# Move to /dist directory as the place for resulting binary folder
WORKDIR /dist
# Copy binary from build to main folder
RUN cp /build/main .
# Build a small image
FROM scratch
COPY --from=builder /dist/main /
COPY --from=builder /dist/configurations /configurations
ENTRYPOINT ["/main"]

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GNU GENERAL PUBLIC LICENSE
==========================
Version 3, 29 June 2007
Copyright &copy; 2007 Free Software Foundation, Inc. &lt;<https://www.fsf.org/>&gt;
Everyone is permitted to copy and distribute verbatim copies of this license
document, but changing it is not allowed.
## Preamble
The GNU General Public License is a free, copyleft license for software and other
kinds of works.
The licenses for most software and other practical works are designed to take away
your freedom to share and change the works. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change all versions of a
program--to make sure it remains free software for all its users. We, the Free
Software Foundation, use the GNU General Public License for most of our software; it
applies also to any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not price. Our General
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## TERMS AND CONDITIONS
### 0. Definitions.
&ldquo;This License&rdquo; refers to version 3 of the GNU General Public License.
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&ldquo;The Program&rdquo; refers to any copyrightable work licensed under this
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### 4. Conveying Verbatim Copies.
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A compilation of a covered work with other separate and independent works, which are
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### 6. Conveying Non-Source Forms.
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### 7. Additional Terms.
&ldquo;Additional permissions&rdquo; are terms that supplement the terms of this
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were included in this License, to the extent that they are valid under applicable
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used separately under those permissions, but the entire Program remains governed by
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When you convey a copy of a covered work, you may at your option remove any
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All other non-permissive additional terms are considered &ldquo;further
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along with a term that is a further restriction, you may remove that term. If a
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If you add terms to a covered work in accord with this section, you must place, in
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Additional terms, permissive or non-permissive, may be stated in the form of a
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### 8. Termination.
You may not propagate or modify a covered work except as expressly provided under
this License. Any attempt otherwise to propagate or modify it is void, and will
automatically terminate your rights under this License (including any patent licenses
granted under the third paragraph of section 11).
However, if you cease all violation of this License, then your license from a
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copyright holder explicitly and finally terminates your license, and (b) permanently,
if the copyright holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is reinstated permanently
if the copyright holder notifies you of the violation by some reasonable means, this
is the first time you have received notice of violation of this License (for any
work) from that copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.
Termination of your rights under this section does not terminate the licenses of
parties who have received copies or rights from you under this License. If your
rights have been terminated and not permanently reinstated, you do not qualify to
receive new licenses for the same material under section 10.
### 9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or run a copy of the
Program. Ancillary propagation of a covered work occurring solely as a consequence of
using peer-to-peer transmission to receive a copy likewise does not require
acceptance. However, nothing other than this License grants you permission to
propagate or modify any covered work. These actions infringe copyright if you do not
accept this License. Therefore, by modifying or propagating a covered work, you
indicate your acceptance of this License to do so.
### 10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically receives a license
from the original licensors, to run, modify and propagate that work, subject to this
License. You are not responsible for enforcing compliance by third parties with this
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An &ldquo;entity transaction&rdquo; is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an organization, or
merging organizations. If propagation of a covered work results from an entity
transaction, each party to that transaction who receives a copy of the work also
receives whatever licenses to the work the party's predecessor in interest had or
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has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the rights granted or
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or other charge for exercise of rights granted under this License, and you may not
initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging
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importing the Program or any portion of it.
### 11. Patents.
A &ldquo;contributor&rdquo; is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The work thus
licensed is called the contributor's &ldquo;contributor version&rdquo;.
A contributor's &ldquo;essential patent claims&rdquo; are all patent claims owned or
controlled by the contributor, whether already acquired or hereafter acquired, that
would be infringed by some manner, permitted by this License, of making, using, or
selling its contributor version, but do not include claims that would be infringed
only as a consequence of further modification of the contributor version. For
purposes of this definition, &ldquo;control&rdquo; includes the right to grant patent
sublicenses in a manner consistent with the requirements of this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free patent license
under the contributor's essential patent claims, to make, use, sell, offer for sale,
import and otherwise run, modify and propagate the contents of its contributor
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In the following three paragraphs, a &ldquo;patent license&rdquo; is any express
agreement or commitment, however denominated, not to enforce a patent (such as an
express permission to practice a patent or covenant not to sue for patent
infringement). To &ldquo;grant&rdquo; such a patent license to a party means to make
such an agreement or commitment not to enforce a patent against the party.
If you convey a covered work, knowingly relying on a patent license, and the
Corresponding Source of the work is not available for anyone to copy, free of charge
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Source to be so available, or (2) arrange to deprive yourself of the benefit of the
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the requirements of this License, to extend the patent license to downstream
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for the patent license, your conveying the covered work in a country, or your
recipient's use of the covered work in a country, would infringe one or more
identifiable patents in that country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or arrangement, you
convey, or propagate by procuring conveyance of, a covered work, and grant a patent
license to some of the parties receiving the covered work authorizing them to use,
propagate, modify or convey a specific copy of the covered work, then the patent
license you grant is automatically extended to all recipients of the covered work and
works based on it.
A patent license is &ldquo;discriminatory&rdquo; if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned on the
non-exercise of one or more of the rights that are specifically granted under this
License. You may not convey a covered work if you are a party to an arrangement with
a third party that is in the business of distributing software, under which you make
payment to the third party based on the extent of your activity of conveying the
work, and under which the third party grants, to any of the parties who would receive
the covered work from you, a discriminatory patent license (a) in connection with
copies of the covered work conveyed by you (or copies made from those copies), or (b)
primarily for and in connection with specific products or compilations that contain
the covered work, unless you entered into that arrangement, or that patent license
was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting any implied
license or other defenses to infringement that may otherwise be available to you
under applicable patent law.
### 12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or otherwise)
that contradict the conditions of this License, they do not excuse you from the
conditions of this License. If you cannot convey a covered work so as to satisfy
simultaneously your obligations under this License and any other pertinent
obligations, then as a consequence you may not convey it at all. For example, if you
agree to terms that obligate you to collect a royalty for further conveying from
those to whom you convey the Program, the only way you could satisfy both those terms
and this License would be to refrain entirely from conveying the Program.
### 13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have permission to link or
combine any covered work with a work licensed under version 3 of the GNU Affero
General Public License into a single combined work, and to convey the resulting work.
The terms of this License will continue to apply to the part which is the covered
work, but the special requirements of the GNU Affero General Public License, section
13, concerning interaction through a network will apply to the combination as such.
### 14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of the GNU
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 address new problems or concerns.
Each version is given a distinguishing version number. If the Program specifies that
a certain numbered version of the GNU General Public License &ldquo;or any later
version&rdquo; applies to it, you have the option of following the terms and
conditions either of that numbered version or of any later version published by the
Free Software Foundation. If the Program does not specify a version number of the GNU
General Public License, you may choose any version ever published by the Free
Software Foundation.
If the Program specifies that a proxy can decide which future versions of the GNU
General Public License can be used, that proxy's public statement of acceptance of a
version permanently authorizes you to choose that version for the Program.
Later license versions may give you additional or different permissions. However, no
additional obligations are imposed on any author or copyright holder as a result of
your choosing to follow a later version.
### 15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM &ldquo;AS IS&rdquo; WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE
QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
### 16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS
PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE
OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE
WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
### 17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided above cannot be
given local legal effect according to their terms, reviewing courts shall apply local
law that most closely approximates an absolute waiver of all civil liability in
connection with the Program, unless a warranty or assumption of liability accompanies
a copy of the Program in return for a fee.
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 state the exclusion of warranty;
and each file should have at least the &ldquo;copyright&rdquo; line and a pointer to
where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short notice like this
when it starts in an interactive mode:
Beelzebub Copyright (C) 2022 Mario Candela
This program 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, your program's commands might be different;
for a GUI interface, you would use an &ldquo;about box&rdquo;.
You should also get your employer (if you work as a programmer) or school, if any, to
sign a &ldquo;copyright disclaimer&rdquo; for the program, if necessary. For more
information on this, and how to apply and follow the GNU GPL, see
&lt;<https://www.gnu.org/licenses/>&gt;.
The GNU 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. But first, please read
&lt;<https://www.gnu.org/philosophy/why-not-lgpl.html>&gt;.

6
configurations/beelzebub.yaml Normal file
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core:
logging:
debug: false
debugReportCaller: false
logDisableTimestamp: true
logsPath: ./logs

18
configurations/services/http-80.yaml Normal file
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10
configurations/services/http-8080.yaml Normal file
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apiVersion: "v1"
protocol: "http"
address: ":8080"
commands:
- regex: "wp-admin"
handler: "login"
headers:
- "Content-Type: text/html"
- "Expires: 0"
- "Version: 6.42.12"

24
configurations/services/ssh-22.yaml Normal file
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apiVersion: "v1"
protocol: "ssh"
address: ":22"
commands:
- regex: "^ls$"
handler: "Documents Images Desktop Downloads .m2 .kube .ssh .docker"
- regex: "^pwd$"
handler: "/home/"
- regex: "^uname -m$"
handler: "x86_64"
- regex: "^docker ps$"
handler: "CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES"
- regex: "^docker .*$"
handler: "Error response from daemon: dial unix docker.raw.sock: connect: connection refused"
- regex: "^uname$"
handler: "Linux"
- regex: "^ps$"
handler: " PID TTY TIME CMD\n21642 ttys000 0:00.07 /bin/dockerd"
- regex: "^(.+)$"
handler: "command not found"
serverVersion: "OpenSSH"
serverName: "ubuntu"
passwordRegex: "^(root|qwerty)$"
deadlineTimeoutSeconds: 60

11
docker-compose.yml Normal file
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version: "3.9"
services:
beelzebub:
build: .
#network_mode: host #baby jesus mac os
container_name: beelzebub
ports:
- "22:22"
- "8080:8080"
- "80:80"

12
go.mod Normal file
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module beelzebub
go 1.16
require (
github.com/gliderlabs/ssh v0.3.3 // indirect
github.com/google/uuid v1.3.0 // indirect
github.com/sirupsen/logrus v1.8.1
github.com/stretchr/testify v1.2.2 // indirect
golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e // indirect
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
)

30
go.sum Normal file
View File

@ -0,0 +1,30 @@
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/gliderlabs/ssh v0.3.3 h1:mBQ8NiOgDkINJrZtoizkC3nDNYgSaWtxyem6S2XHBtA=
github.com/gliderlabs/ssh v0.3.3/go.mod h1:ZSS+CUoKHDrqVakTfTWUlKSr9MtMFkC4UvtQKD7O914=
github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e h1:gsTQYXdTw2Gq7RBsWvlQ91b+aEQ6bXFUngBGuR8sPpI=
golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210616094352-59db8d763f22 h1:RqytpXGR1iVNX7psjB3ff8y7sNFinVFvkx1c8SjBkio=
golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

77
main.go Normal file
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package main
import (
"beelzebub/parser"
"beelzebub/protocols"
log "github.com/sirupsen/logrus"
"io"
"os"
)
var quit = make(chan struct{})
func main() {
configurationsParser := parser.Init("./configurations/beelzebub.yaml", "./configurations/services/")
coreConfigurations, err := configurationsParser.ReadConfigurationsCore()
if err != nil {
log.Fatal(err)
}
fileLogs := configureLogging(coreConfigurations.Core.Logging)
defer fileLogs.Close()
beelzebubServicesConfiguration, err := configurationsParser.ReadConfigurationsServices()
if err != nil {
log.Fatal(err)
}
// Protocol strategies
secureShellStrategy := &protocols.SecureShellStrategy{}
hypertextTransferProtocolStrategy := &protocols.HypertextTransferProtocolStrategy{}
// Protocol manager
manager := protocols.ProtocolManager{}
serviceManager := manager.InitServiceManager()
for _, beelzebubServiceConfiguration := range beelzebubServicesConfiguration {
switch beelzebubServiceConfiguration.Protocol {
case "http":
serviceManager.SetProtocolStrategy(hypertextTransferProtocolStrategy)
break
case "ssh":
serviceManager.SetProtocolStrategy(secureShellStrategy)
break
default:
log.Fatalf("Protocol %s not managed", beelzebubServiceConfiguration.Protocol)
continue
}
err := serviceManager.InitService(beelzebubServiceConfiguration)
if err != nil {
log.Errorf("Error during init protocol: %s, %s", beelzebubServiceConfiguration.Protocol, err.Error())
}
}
<-quit
}
func configureLogging(configurations parser.Logging) *os.File {
file, err := os.OpenFile(configurations.LogsPath, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0666)
if err != nil {
log.Fatalf("error opening file: %v", err)
}
mw := io.MultiWriter(os.Stdout, file)
log.SetOutput(mw)
log.SetFormatter(&log.JSONFormatter{
DisableTimestamp: configurations.LogDisableTimestamp,
})
log.SetReportCaller(configurations.DebugReportCaller)
if configurations.Debug {
log.SetLevel(log.DebugLevel)
} else {
log.SetLevel(log.InfoLevel)
}
return file
}

119
parser/configurationsParser.go Normal file
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package parser
import (
"fmt"
log "github.com/sirupsen/logrus"
"gopkg.in/yaml.v3"
"io/ioutil"
"os"
"path/filepath"
)
type BeelzebubCoreConfigurations struct {
Core struct {
Logging Logging `yaml:"logging"`
}
}
type Logging struct {
Debug bool `yaml:"debug"`
DebugReportCaller bool `yaml:"debugReportCaller"`
LogDisableTimestamp bool `yaml:"logDisableTimestamp"`
LogsPath string `yaml:"logsPath,omitempty"`
}
type BeelzebubServiceConfiguration struct {
ApiVersion string `yaml:"apiVersion"`
Protocol string `yaml:"protocol"`
Address string `yaml:"address"`
Commands []Command `yaml:"commands"`
ServerVersion string `yaml:"serverVersion"`
ServerName string `yaml:"serverName"`
DeadlineTimeoutSeconds int `yaml:"deadlineTimeoutSeconds"`
PasswordRegex string `yaml:"passwordRegex"`
}
type Command struct {
Regex string `yaml:"regex"`
Handler string `yaml:"handler"`
Headers []string `yaml:"headers"`
StatusCode int `yaml:"statusCode"`
}
type configurationsParser struct {
configurationsCorePath string
configurationsServicesDirectory string
readFileBytes ReadFileBytes
readDir ReadDir
}
type ReadFileBytes func(filePath string) ([]byte, error)
type ReadDir func(dirName string) ([]string, error)
// Init Parser, return a configurationsParser and use the DI Pattern to inject the dependencies
func Init(configurationsCorePath, configurationsServicesDirectory string) *configurationsParser {
return &configurationsParser{
configurationsCorePath: configurationsCorePath,
configurationsServicesDirectory: configurationsServicesDirectory,
readFileBytes: readFileBytes,
readDir: readDir,
}
}
func (bp configurationsParser) ReadConfigurationsCore() (*BeelzebubCoreConfigurations, error) {
buf, err := bp.readFileBytes(bp.configurationsCorePath)
if err != nil {
return nil, fmt.Errorf("in file %s: %v", bp.configurationsCorePath, err)
}
beelzebubConfiguration := &BeelzebubCoreConfigurations{}
err = yaml.Unmarshal(buf, beelzebubConfiguration)
if err != nil {
return nil, fmt.Errorf("in file %s: %v", bp.configurationsCorePath, err)
}
return beelzebubConfiguration, nil
}
func (bp configurationsParser) ReadConfigurationsServices() ([]BeelzebubServiceConfiguration, error) {
services, err := bp.readDir(bp.configurationsServicesDirectory)
if err != nil {
return nil, fmt.Errorf("in directory %s: %v", bp.configurationsServicesDirectory, err)
}
var servicesConfiguration []BeelzebubServiceConfiguration
for _, servicesName := range services {
filePath := filepath.Join(bp.configurationsServicesDirectory, servicesName)
buf, err := bp.readFileBytes(filePath)
if err != nil {
return nil, fmt.Errorf("in file %s: %v", filePath, err)
}
beelzebubServiceConfiguration := &BeelzebubServiceConfiguration{}
err = yaml.Unmarshal(buf, beelzebubServiceConfiguration)
if err != nil {
return nil, fmt.Errorf("in file %s: %v", filePath, err)
}
log.Debug(beelzebubServiceConfiguration)
servicesConfiguration = append(servicesConfiguration, *beelzebubServiceConfiguration)
}
return servicesConfiguration, nil
}
func readDir(dirName string) ([]string, error) {
var filesName []string
files, err := ioutil.ReadDir(dirName)
if err != nil {
return nil, err
}
for _, file := range files {
filesName = append(filesName, file.Name())
}
return filesName, nil
}
func readFileBytes(filePath string) ([]byte, error) {
return os.ReadFile(filePath)
}

113
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package parser
import (
"errors"
"github.com/stretchr/testify/assert"
"testing"
)
func mockReadfilebytesConfigurationsCore(filePath string) ([]byte, error) {
configurationsCoreBytes := []byte(`
core:
logging:
debug: false
debugReportCaller: false
logDisableTimestamp: true
logsPath: ./logs`)
return configurationsCoreBytes, nil
}
func mockReadfilebytesFormatError(filePath string) ([]byte, error) {
configurationsCoreBytes := []byte(`{{}`)
return configurationsCoreBytes, nil
}
func mockReadfilebytesError(filePath string) ([]byte, error) {
return nil, errors.New("mockErrorReadFileBytes")
}
func mockReadDirError(dirPath string) ([]string, error) {
return nil, errors.New("mockErrorReadFileBytes")
}
func mockReadDirValid(dirPath string) ([]string, error) {
return []string{""}, nil
}
func mockReadfilebytesBeelzebubServiceConfiguration(filePath string) ([]byte, error) {
beelzebubServiceConfiguration := []byte(`
apiVersion: "v1"
protocol: "http"
address: ":8080"
commands:
- regex: "wp-admin"
handler: "login"
headers:
- "Content-Type: text/html"`)
return beelzebubServiceConfiguration, nil
}
func TestReadConfigurationsCoreError(t *testing.T) {
configurationsParser := Init("mockConfigurationsCorePath", "mockConfigurationsServicesDirectory")
configurationsParser.readFileBytes = mockReadfilebytesError
beelzebubCoreConfigurations, err := configurationsParser.ReadConfigurationsCore()
assert.Nil(t, beelzebubCoreConfigurations)
assert.Error(t, err)
assert.Equal(t, "in file mockConfigurationsCorePath: mockErrorReadFileBytes", err.Error())
configurationsParser.readFileBytes = mockReadfilebytesFormatError
beelzebubCoreConfigurations, err = configurationsParser.ReadConfigurationsCore()
assert.Nil(t, beelzebubCoreConfigurations)
assert.Error(t, err)
assert.Equal(t, "in file mockConfigurationsCorePath: yaml: line 1: did not find expected ',' or '}'", err.Error())
}
func TestReadConfigurationsCoreValid(t *testing.T) {
configurationsParser := Init("", "")
configurationsParser.readFileBytes = mockReadfilebytesConfigurationsCore
coreConfigurations, err := configurationsParser.ReadConfigurationsCore()
assert.Nil(t, err)
assert.NotNil(t, coreConfigurations.Core)
assert.NotNil(t, coreConfigurations.Core.Logging)
assert.Equal(t, coreConfigurations.Core.Logging.Debug, false)
assert.Equal(t, coreConfigurations.Core.Logging.LogDisableTimestamp, true)
assert.Equal(t, coreConfigurations.Core.Logging.DebugReportCaller, false)
assert.Equal(t, coreConfigurations.Core.Logging.LogsPath, "./logs")
}
func TestReadConfigurationsServicesFail(t *testing.T) {
configurationsParser := Init("", "")
configurationsParser.readFileBytes = mockReadfilebytesError
configurationsParser.readDir = mockReadDirError
beelzebubServiceConfiguration, err := configurationsParser.ReadConfigurationsServices()
assert.Nil(t, beelzebubServiceConfiguration)
assert.Error(t, err)
}
func TestReadConfigurationsServicesValid(t *testing.T) {
configurationsParser := Init("", "")
configurationsParser.readFileBytes = mockReadfilebytesBeelzebubServiceConfiguration
configurationsParser.readDir = mockReadDirValid
beelzebubServicesConfiguration, err := configurationsParser.ReadConfigurationsServices()
firstBeelzebubServiceConfiguration := beelzebubServicesConfiguration[0]
assert.Nil(t, err)
assert.Equal(t, firstBeelzebubServiceConfiguration.Protocol, "http")
assert.Equal(t, firstBeelzebubServiceConfiguration.ApiVersion, "v1")
assert.Equal(t, firstBeelzebubServiceConfiguration.Address, ":8080")
assert.Equal(t, len(firstBeelzebubServiceConfiguration.Commands), 1)
assert.Equal(t, len(firstBeelzebubServiceConfiguration.Commands), 1)
assert.Equal(t, firstBeelzebubServiceConfiguration.Commands[0].Regex, "wp-admin")
assert.Equal(t, firstBeelzebubServiceConfiguration.Commands[0].Handler, "login")
assert.Equal(t, len(firstBeelzebubServiceConfiguration.Commands[0].Headers), 1)
assert.Equal(t, firstBeelzebubServiceConfiguration.Commands[0].Headers[0], "Content-Type: text/html")
}

90
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package protocols
import (
"beelzebub/parser"
"fmt"
log "github.com/sirupsen/logrus"
"io"
"net/http"
"regexp"
"strings"
)
type HypertextTransferProtocolStrategy struct {
serverMux *http.ServeMux
beelzebubServiceConfiguration parser.BeelzebubServiceConfiguration
}
func (httpStrategy HypertextTransferProtocolStrategy) Init(beelzebubServiceConfiguration parser.BeelzebubServiceConfiguration) error {
httpStrategy.beelzebubServiceConfiguration = beelzebubServiceConfiguration
httpStrategy.serverMux = http.NewServeMux()
httpStrategy.buildHandler()
go func() {
httpStrategy.listenAndServe()
}()
log.WithFields(log.Fields{
"port": beelzebubServiceConfiguration.Address,
"commands": len(beelzebubServiceConfiguration.Commands),
}).Infof("Init service %s", beelzebubServiceConfiguration.Protocol)
return nil
}
func (httpStrategy HypertextTransferProtocolStrategy) listenAndServe() {
err := http.ListenAndServe(httpStrategy.beelzebubServiceConfiguration.Address, httpStrategy.serverMux)
if err != nil {
log.Errorf("Error during init HTTP Protocol: %s", err.Error())
return
}
}
func (httpStrategy HypertextTransferProtocolStrategy) buildHandler() {
httpStrategy.serverMux.HandleFunc("/", func(responseWriter http.ResponseWriter, request *http.Request) {
traceRequest(request)
for _, command := range httpStrategy.beelzebubServiceConfiguration.Commands {
matched, err := regexp.MatchString(command.Regex, request.RequestURI)
if err != nil {
log.Errorf("Error regex: %s, %s", command.Regex, err.Error())
continue
}
if matched {
setResponseHeaders(responseWriter, command.Headers, command.StatusCode)
fmt.Fprintf(responseWriter, command.Handler)
break
}
}
})
}
func traceRequest(request *http.Request) {
bodyBytes, err := io.ReadAll(request.Body)
body := ""
if err == nil {
body = string(bodyBytes)
}
log.WithFields(log.Fields{
"requestURI": request.RequestURI,
"proto": request.Proto,
"method": request.Method,
"body": body,
"host": request.Host,
"userAgent": request.UserAgent(),
"cookies": request.Cookies(),
"ip": request.RemoteAddr,
"headers": request.Header,
"remoteAddr": request.RemoteAddr,
}).Info("New HTTP request")
}
func setResponseHeaders(responseWriter http.ResponseWriter, headers []string, statusCode int) {
responseWriter.WriteHeader(statusCode)
for _, headerStr := range headers {
keyValue := strings.Split(headerStr, ":")
if len(keyValue) > 1 {
responseWriter.Header().Add(keyValue[0], keyValue[1])
}
}
}

19
protocols/protocolManager.go Normal file
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package protocols
import "beelzebub/parser"
type ProtocolManager struct {
strategy ServiceStrategy
}
func (pm *ProtocolManager) InitServiceManager() *ProtocolManager {
return &ProtocolManager{}
}
func (pm *ProtocolManager) SetProtocolStrategy(strategy ServiceStrategy) {
pm.strategy = strategy
}
func (pm *ProtocolManager) InitService(beelzebubServiceConfiguration parser.BeelzebubServiceConfiguration) error {
return pm.strategy.Init(beelzebubServiceConfiguration)
}

7
protocols/protocolStrategy.go Normal file
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package protocols
import "beelzebub/parser"
type ServiceStrategy interface {
Init(beelzebubServiceConfiguration parser.BeelzebubServiceConfiguration) error
}

113
protocols/secureShellStrategy.go Normal file
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package protocols
import (
"beelzebub/parser"
"fmt"
"github.com/gliderlabs/ssh"
"github.com/google/uuid"
log "github.com/sirupsen/logrus"
"golang.org/x/crypto/ssh/terminal"
"regexp"
"time"
)
type SecureShellStrategy struct {
}
func (SSHStrategy *SecureShellStrategy) Init(beelzebubServiceConfiguration parser.BeelzebubServiceConfiguration) error {
go func() {
server := &ssh.Server{
Addr: beelzebubServiceConfiguration.Address,
MaxTimeout: time.Duration(beelzebubServiceConfiguration.DeadlineTimeoutSeconds) * time.Second,
IdleTimeout: time.Duration(beelzebubServiceConfiguration.DeadlineTimeoutSeconds) * time.Second,
Version: beelzebubServiceConfiguration.ServerVersion,
Handler: func(sess ssh.Session) {
uuidSession := uuid.New()
traceSessionStart(sess, uuidSession)
term := terminal.NewTerminal(sess, buildPrompt(sess.User(), beelzebubServiceConfiguration.ServerName))
for {
commandInput, err := term.ReadLine()
if err != nil {
break
}
traceCommand(commandInput, uuidSession)
if commandInput == "exit" {
break
}
for _, command := range beelzebubServiceConfiguration.Commands {
matched, err := regexp.MatchString(command.Regex, commandInput)
if err != nil {
log.Errorf("Error regex: %s, %s", command.Regex, err.Error())
continue
}
if matched {
term.Write(append([]byte(command.Handler), '\n'))
break
}
}
}
traceSessionEnd(sess, uuidSession)
},
PasswordHandler: func(ctx ssh.Context, password string) bool {
traceAttempt(ctx, password)
matched, err := regexp.MatchString(beelzebubServiceConfiguration.PasswordRegex, password)
if err != nil {
log.Errorf("Error regex: %s, %s", beelzebubServiceConfiguration.PasswordRegex, err.Error())
return false
}
return matched
},
}
err := server.ListenAndServe()
if err != nil {
log.Errorf("Error during init SSH Protocol: %s", err.Error())
}
}()
log.WithFields(log.Fields{
"port": beelzebubServiceConfiguration.Address,
"commands": len(beelzebubServiceConfiguration.Commands),
}).Infof("Init service %s", beelzebubServiceConfiguration.Protocol)
return nil
}
func buildPrompt(user string, serverName string) string {
return fmt.Sprintf("%s@%s:~$ ", user, serverName)
}
func traceAttempt(ctx ssh.Context, password string) {
log.WithFields(log.Fields{
"remoteAddr": ctx.RemoteAddr(),
"user": ctx.User(),
"password": password,
"client": ctx.ClientVersion(),
}).Info("New SSH attempt")
}
func traceSessionStart(sess ssh.Session, uuidSession uuid.UUID) {
log.WithFields(log.Fields{
"uuidSession": uuidSession,
"remoteAddr": sess.RemoteAddr(),
"command": sess.Command(),
"environ": sess.Environ(),
"user": sess.User(),
}).Info("New SSH Session")
}
func traceSessionEnd(sess ssh.Session, uuidSession uuid.UUID) {
log.WithFields(log.Fields{
"uuidSession": uuidSession,
"remoteAddr": sess.RemoteAddr(),
"command": sess.Command(),
"environ": sess.Environ(),
"user": sess.User(),
}).Info("End SSH Session")
}
func traceCommand(command string, uuidSession uuid.UUID) {
log.WithFields(log.Fields{
"uuidSession": uuidSession,
"command": command,
}).Info("New SSH Command")
}