chore: remove security API ReadFile/WriteFile

This seems to be unused completely, and they look scary enough at the
same time.

For better readability and to avoid any pitfalls, better to remove them.

Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
(cherry picked from commit c3a4173)

api/security/security.proto

@@ -10,8 +10,6 @@ option java_package = "com.security.api";
 // The security service definition.
 service SecurityService {
   rpc Certificate(CertificateRequest) returns (CertificateResponse);
-  rpc ReadFile(ReadFileRequest) returns (ReadFileResponse);
-  rpc WriteFile(WriteFileRequest) returns (WriteFileResponse);
 }
 
 // The request message containing the process name.
@@ -24,23 +22,3 @@ message CertificateResponse {
   bytes ca = 1;
   bytes crt = 2;
 }
-
-// The request message for reading a file on disk.
-message ReadFileRequest {
-  string path = 1;
-}
-
-// The response message for reading a file on disk.
-message ReadFileResponse {
-  bytes data = 1;
-}
-
-// The request message containing the process name.
-message WriteFileRequest {
-  string path = 1;
-  bytes data = 2;
-  int32 perm = 3;
-}
-
-// The response message containing the requested logs.
-message WriteFileResponse {}

internal/app/trustd/internal/reg/reg.go

@@ -6,10 +6,6 @@ package reg
 
 import (
 	"context"
-	"io/ioutil"
-	"log"
-	"os"
-	"path"
 
 	"github.com/talos-systems/crypto/x509"
 	"google.golang.org/grpc"
@@ -49,35 +45,3 @@ func (r *Registrator) Certificate(ctx context.Context, in *securityapi.Certifica
 
 	return resp, nil
 }
-
-// ReadFile implements the securityapi.SecurityServer interface.
-func (r *Registrator) ReadFile(ctx context.Context, in *securityapi.ReadFileRequest) (resp *securityapi.ReadFileResponse, err error) {
-	var b []byte
-
-	if b, err = ioutil.ReadFile(in.Path); err != nil {
-		return nil, err
-	}
-
-	log.Printf("read file on disk: %s", in.Path)
-
-	resp = &securityapi.ReadFileResponse{Data: b}
-
-	return resp, nil
-}
-
-// WriteFile implements the securityapi.SecurityServer interface.
-func (r *Registrator) WriteFile(ctx context.Context, in *securityapi.WriteFileRequest) (resp *securityapi.WriteFileResponse, err error) {
-	if err = os.MkdirAll(path.Dir(in.Path), os.ModeDir); err != nil {
-		return
-	}
-
-	if err = ioutil.WriteFile(in.Path, in.Data, os.FileMode(in.Perm)); err != nil {
-		return
-	}
-
-	log.Printf("wrote file to disk: %s", in.Path)
-
-	resp = &securityapi.WriteFileResponse{}
-
-	return resp, nil
-}