diff --git a/core/pkg/logbuffer/BUILD.bazel b/core/pkg/logbuffer/BUILD.bazel
index fb7512a..958389e 100644
--- a/core/pkg/logbuffer/BUILD.bazel
+++ b/core/pkg/logbuffer/BUILD.bazel
@@ -8,6 +8,7 @@
     ],
     importpath = "git.monogon.dev/source/nexantic.git/core/pkg/logbuffer",
     visibility = ["//visibility:public"],
+    deps = ["//core/proto/api:go_default_library"],
 )
 
 go_test(
diff --git a/core/pkg/logbuffer/linebuffer.go b/core/pkg/logbuffer/linebuffer.go
index 6ee7d6b..fa4dc33 100644
--- a/core/pkg/logbuffer/linebuffer.go
+++ b/core/pkg/logbuffer/linebuffer.go
@@ -21,6 +21,8 @@
 	"fmt"
 	"strings"
 	"sync"
+
+	apb "git.monogon.dev/source/nexantic.git/core/proto/api"
 )
 
 // Line is a line stored in the log buffer - a string, that has been perhaps truncated (due to exceeded limits).
@@ -43,6 +45,29 @@
 	return l.Data
 }
 
+// ProtoLog returns a Logging-specific protobuf structure.
+func (l *Line) ProtoLog() *apb.LogEntry_Raw {
+	return &apb.LogEntry_Raw{
+		Data:           l.Data,
+		OriginalLength: int64(l.OriginalLength),
+	}
+}
+
+// LineFromLogProto converts a Logging-specific protobuf message back into a Line.
+func LineFromLogProto(raw *apb.LogEntry_Raw) (*Line, error) {
+	if raw.OriginalLength < int64(len(raw.Data)) {
+		return nil, fmt.Errorf("original_length smaller than length of data")
+	}
+	originalLength := int(raw.OriginalLength)
+	if int64(originalLength) < raw.OriginalLength {
+		return nil, fmt.Errorf("original_length larger than native int size")
+	}
+	return &Line{
+		Data:           raw.Data,
+		OriginalLength: originalLength,
+	}, nil
+}
+
 // LineBuffer is a io.WriteCloser that will call a given callback every time a line is completed.
 type LineBuffer struct {
 	maxLineLength int