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|
require 'base64'
require 'json'
require 'securerandom'
require 'uri'
module Gitlab
class Workhorse
SEND_DATA_HEADER = 'Gitlab-Workhorse-Send-Data'.freeze
VERSION_FILE = 'GITLAB_WORKHORSE_VERSION'.freeze
INTERNAL_API_CONTENT_TYPE = 'application/vnd.gitlab-workhorse+json'.freeze
INTERNAL_API_REQUEST_HEADER = 'Gitlab-Workhorse-Api-Request'.freeze
NOTIFICATION_CHANNEL = 'workhorse:notifications'.freeze
# Supposedly the effective key size for HMAC-SHA256 is 256 bits, i.e. 32
# bytes https://tools.ietf.org/html/rfc4868#section-2.6
SECRET_LENGTH = 32
class << self
def git_http_ok(repository, is_wiki, user, action)
project = repository.project
repo_path = repository.path_to_repo
params = {
GL_ID: Gitlab::GlId.gl_id(user),
GL_REPOSITORY: Gitlab::GlRepository.gl_repository(project, is_wiki),
RepoPath: repo_path
}
if Gitlab.config.gitaly.enabled
address = Gitlab::GitalyClient.address(project.repository_storage)
params[:Repository] = repository.gitaly_repository.to_h
feature_enabled = case action.to_s
when 'git_receive_pack'
Gitlab::GitalyClient.feature_enabled?(:post_receive_pack)
when 'git_upload_pack'
Gitlab::GitalyClient.feature_enabled?(:post_upload_pack)
when 'info_refs'
true
else
raise "Unsupported action: #{action}"
end
params[:GitalyAddress] = address if feature_enabled
end
params
end
def lfs_upload_ok(oid, size)
{
StoreLFSPath: "#{Gitlab.config.lfs.storage_path}/tmp/upload",
LfsOid: oid,
LfsSize: size
}
end
def artifact_upload_ok
{ TempPath: ArtifactUploader.artifacts_upload_path }
end
def send_git_blob(repository, blob)
params = {
'RepoPath' => repository.path_to_repo,
'BlobId' => blob.id
}
[
SEND_DATA_HEADER,
"git-blob:#{encode(params)}"
]
end
def send_git_archive(repository, ref:, format:)
format ||= 'tar.gz'
format.downcase!
params = repository.archive_metadata(ref, Gitlab.config.gitlab.repository_downloads_path, format)
raise "Repository or ref not found" if params.empty?
[
SEND_DATA_HEADER,
"git-archive:#{encode(params)}"
]
end
def send_git_diff(repository, diff_refs)
params = {
'RepoPath' => repository.path_to_repo,
'ShaFrom' => diff_refs.base_sha,
'ShaTo' => diff_refs.head_sha
}
[
SEND_DATA_HEADER,
"git-diff:#{encode(params)}"
]
end
def send_git_patch(repository, diff_refs)
params = {
'RepoPath' => repository.path_to_repo,
'ShaFrom' => diff_refs.base_sha,
'ShaTo' => diff_refs.head_sha
}
[
SEND_DATA_HEADER,
"git-format-patch:#{encode(params)}"
]
end
def send_artifacts_entry(build, entry)
params = {
'Archive' => build.artifacts_file.path,
'Entry' => Base64.encode64(entry.path)
}
[
SEND_DATA_HEADER,
"artifacts-entry:#{encode(params)}"
]
end
def terminal_websocket(terminal)
details = {
'Terminal' => {
'Subprotocols' => terminal[:subprotocols],
'Url' => terminal[:url],
'Header' => terminal[:headers],
'MaxSessionTime' => terminal[:max_session_time]
}
}
details['Terminal']['CAPem'] = terminal[:ca_pem] if terminal.key?(:ca_pem)
details
end
def version
path = Rails.root.join(VERSION_FILE)
path.readable? ? path.read.chomp : 'unknown'
end
def secret
@secret ||= begin
bytes = Base64.strict_decode64(File.read(secret_path).chomp)
raise "#{secret_path} does not contain #{SECRET_LENGTH} bytes" if bytes.length != SECRET_LENGTH
bytes
end
end
def write_secret
bytes = SecureRandom.random_bytes(SECRET_LENGTH)
File.open(secret_path, 'w:BINARY', 0600) do |f|
f.chmod(0600) # If the file already existed, the '0600' passed to 'open' above was a no-op.
f.write(Base64.strict_encode64(bytes))
end
end
def verify_api_request!(request_headers)
decode_jwt(request_headers[INTERNAL_API_REQUEST_HEADER])
end
def decode_jwt(encoded_message)
JWT.decode(
encoded_message,
secret,
true,
{ iss: 'gitlab-workhorse', verify_iss: true, algorithm: 'HS256' }
)
end
def secret_path
Gitlab.config.workhorse.secret_file
end
def set_key_and_notify(key, value, expire: nil, overwrite: true)
Gitlab::Redis.with do |redis|
result = redis.set(key, value, ex: expire, nx: !overwrite)
if result
redis.publish(NOTIFICATION_CHANNEL, "#{key}=#{value}")
value
else
redis.get(key)
end
end
end
protected
def encode(hash)
Base64.urlsafe_encode64(JSON.dump(hash))
end
end
end
end
|
