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M. Mert Yıldıran 2ad4838cf5
Add Go crypto/tls eBPF tracer for TLS connections (#1120) 
* Run `go generate tls_tapper.go`

* Add `golang_uprobes.c`

* Add Golang hooks and offsets

* Add `golangConnection` struct and implement `pollGolangReadWrite` method

* Upgrade `github.com/cilium/ebpf` version to `v0.8.1`

* Fix the linter error

* Move map related stuff to `maps.h` and run `go generate tls_tapper.go`

* Remove unused parameter

* Add an environment variable to test Golang locally

* Replace `Libssl` occurrences with `Ssllib` for consistency

* Fix exe path finding

* Temporarily disable OpenSSL

* Fix the mixed offsets and dissection preparation

* Change the read symbol from `net/http.(*persistConn).Read` to `crypto/tls.(*Conn).Read`

* Remove `len` and `cap` fields

* Fix the indent

* Fix the read data address

* Make `golang_dial_writes` key `__u64` and include the PID

* Fix the read data address one more time

* Temporarily disable the PCAP capture

* Add a uprobe for `net/http.(*gzipReader).Read` to read chunked HTTP response body

* Cancel `golang_crypto_tls_read_uprobe` if it's a gzip read

* Make hash map names more meaningful

* Pass the connection address from `write` to `gzip` through a common address between `gzip` and `dial`

* Fix the probed line number links

* Add `golangReader` struct and implement its `Read` method

* Have a single counter pair and request response matcher per Golang connection

* Add `MIZU_GLOBAL_GOLANG_PATH` environment variable

* `NULL` terminate the bytes with `unix.ByteSliceToString`

* Temporarily reject the gzip chunks

* Add malformed TODOs

* Revert "`NULL` terminate the bytes with `unix.ByteSliceToString`"

This reverts commit 7ee7ef7e44.

* Bring back `len` and `cap` fields

* Set `len` and `cap` in `golang_net_http_gzipreader_read_uprobe` as well

* Remove two `TODO`s

* Fix the `key_gzip` offsets

* Compress if it's gzip chunk (probably wrong!)

* Revert "Compress if it's gzip chunk (probably wrong!)"

This reverts commit 094a7c3da4.

* Remove `golang_net_http_gzipreader_read_uprobe`

* Read constant 4KiB

* Use constant read length

* Get the correct len of bytes (saw the second entry)

* Set all buffer sizes to `CHUNK_SIZE`

* Remove a `TODO`

* Revert "Temporarily disable the PCAP capture"

This reverts commit a2da15ef2d.

* Update `golang_crypto_tls_read_uprobe`

* Set the `reader` field of `tlsStream` to fix a `nil pointer dereference` error

* Don't export any fields of `golangConnection`

* Close the reader when we drop the connection

* Add a tracepoint for `sys_enter_close` to detect socket closes

* Rename `socket` struct to `golang_socket`

* Call `should_tap` in Golang uprobes

* Add `log_error` calls

* Revert "Temporarily disable OpenSSL"

This reverts commit f54d9a453f.

* Fix linter

* Revert "Revert "Temporarily disable OpenSSL""

This reverts commit 2433d867af.

* Change `golang_read_writes` map type from `BPF_RINGBUF` to `BPF_PERF_OUTPUT`

* Rename `golang_read_write` to `golang_event`

* Define an error

* Add comments

* Revert "Revert "Revert "Temporarily disable OpenSSL"""

This reverts commit e5a1de9c71.

* Fix `pollGolang`

* Revert "Revert "Revert "Revert "Temporarily disable OpenSSL""""

This reverts commit 6e1bd5d4f3.

* Fix `panic: send on closed channel`

* Revert "Revert "Revert "Revert "Revert "Temporarily disable OpenSSL"""""

This reverts commit 57d0584655.

* Use `findLibraryByPid`

* Revert "Revert "Revert "Revert "Revert "Revert "Temporarily disable OpenSSL""""""

This reverts commit 46f3d290b0.

* Revert "Revert "Revert "Revert "Revert "Revert "Revert "Temporarily disable OpenSSL"""""""

This reverts commit 775c833c06.

* Log tapping Golang

* Fix `Poll`

* Refactor `golang_net_http_dialconn_uprobe`

* Remove an excess error check

* Fix `can only use path@version syntax with 'go get' and 'go install' in module-aware mode` error in `tap/tlstapper/bpf-builder/build.sh`

* Unify Golang and OpenSSL under a single perf event buffer and `tls_chunk` struct

* Generate `tlsTapperChunkType` type (enum) as well

* Use kernel page size for the `sys_closes` perf buffer

* Fix the linter error

* Fix `MIZU_GLOBAL_GOLANG_PID` environment variable's functionality

* Rely on tracepoints for file descriptor retrieval in Golang implementation

* Remove the unnecessary changes

* Move common functions into `common.c`

* Declare `lookup_ssl_info` function to reduce duplication

* Fix linter

* Add comments and TODOs

* Remove `MIZU_GLOBAL_GOLANG_PATH` environment variable

* Update the object files

* Fix indentation

* Update object files

* Add `go_abi_internal.h`

* Fix `lookup_ssl_info`

* Convert indentation to spaces

* Add header guard comment

* Add more comments

* Find the `ret` instructions using Capstone Engine and `uprobe` the `return` statements

* Implement `get_fd_from_tcp_conn` function

* Separate SSL contexts to OpenSSL and Go

* Move `get_count_bytes` from `common.c` to `openssl_uprobes.c`

* Rename everything contains Golang to Go

* Reduce duplication in `go_uprobes.c`

* Update the comments

* Install Capstone in CI and Docker native builds

* Update `devops/install-capstone.sh`

* Add Capstone to AArch64 cross-compilation target

* Fix some of the issues on ARM64

* Delete the map element in `_ex_urpobe`

* Remove an unsued `LOG_` macro

* Rename `aquynh` to `capstone-engine`

* Add comment

* Revert "Fix some of the issues on ARM64"

This reverts commit 0b3eceddf4.

* Revert "Revert "Fix some of the issues on ARM64""

This reverts commit 681534ada1.

* Update object files

* Remove unnecessary return

* Increase timeout

* #run_acceptance_tests

* #run_acceptance_tests

* Fix the `arm64v8` sourced builds

* #run_acceptance_tests
2022-06-12 14:14:41 +03:00
..
build.sh Support TLS big buffers (#893) 2022-03-23 11:27:06 +02:00
Dockerfile Add Go crypto/tls eBPF tracer for TLS connections (#1120) 2022-06-12 14:14:41 +03:00
README.md Add tls tapper (#683) 2022-02-16 15:34:51 +02:00

README.md

Bpf builder

Currently we push the ebpf *.o files to source control, the motivation for it is to avoid the need for everyone to compile it in their PC.

This directory helps those who do want to build the .o files, it also serve as a documentation for the process of compiling the ebpf code.

How to run ebpf-builder

From you shell, go to this directory and run ./build.sh

Once the docker finished successfully, make sure to commit the four relevant files.

tlstapper_bpfeb.go tlstapper_bpfel.go tlstapper_bpfeb.o tlstapper_bpfel.o