From c7795fcd30a6649eede1abac18bcfbfd0ecd0975 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Wed, 11 Mar 2020 12:07:49 +0100
Subject: Pull changes from common 887a122 and d609df3

---
 lib/edi/STIDecoder.cpp | 2 +-
 lib/edi/STIWriter.cpp  | 8 ++++----
 lib/edi/common.cpp     | 7 ++++++-
 3 files changed, 11 insertions(+), 6 deletions(-)

(limited to 'lib')

diff --git a/lib/edi/STIDecoder.cpp b/lib/edi/STIDecoder.cpp
index 1f5d45e..d55cc12 100644
--- a/lib/edi/STIDecoder.cpp
+++ b/lib/edi/STIDecoder.cpp
@@ -110,7 +110,7 @@ bool STIDecoder::decode_dsti(const vector<uint8_t> &value, uint16_t)
         (md.rfadf ? 9 : 0);
 
     if (value.size() != expected_length) {
-        throw std::logic_error("EDI dsti: Assertion error:"
+        throw std::runtime_error("EDI dsti: decoding error:"
                 "value.size() != expected_length: " +
                to_string(value.size()) + " " +
                to_string(expected_length));
diff --git a/lib/edi/STIWriter.cpp b/lib/edi/STIWriter.cpp
index 389a838..a7e4f20 100644
--- a/lib/edi/STIWriter.cpp
+++ b/lib/edi/STIWriter.cpp
@@ -95,7 +95,7 @@ void STIWriter::update_edi_time(
         uint32_t seconds)
 {
     if (not m_proto_valid) {
-        throw std::logic_error("Cannot update time before protocol");
+        throw std::runtime_error("Cannot update time before protocol");
     }
 
     m_utco = utco;
@@ -109,15 +109,15 @@ void STIWriter::update_edi_time(
 void STIWriter::assemble()
 {
     if (not m_proto_valid) {
-        throw std::logic_error("Cannot assemble STI before protocol");
+        throw std::runtime_error("Cannot assemble STI before protocol");
     }
 
     if (not m_management_data_valid) {
-        throw std::logic_error("Cannot assemble STI before management data");
+        throw std::runtime_error("Cannot assemble STI before management data");
     }
 
     if (not m_payload_valid) {
-        throw std::logic_error("Cannot assemble STI without frame data");
+        throw std::runtime_error("Cannot assemble STI without frame data");
     }
 
     // TODO check time validity
diff --git a/lib/edi/common.cpp b/lib/edi/common.cpp
index 87a15ce..e4a51b4 100644
--- a/lib/edi/common.cpp
+++ b/lib/edi/common.cpp
@@ -307,13 +307,18 @@ bool TagDispatcher::decode_tagpacket(const vector<uint8_t> &payload)
         uint32_t taglength = read_32b(payload.begin() + i + 4);
 
         if (taglength % 8 != 0) {
-            etiLog.log(warn, "Invalid tag length!");
+            etiLog.log(warn, "Invalid tag length: not multiple of 8!");
             break;
         }
         taglength /= 8;
 
         length = taglength;
 
+        if (i + 8 + taglength >= payload.size()) {
+            etiLog.log(warn, "Invalid tag length: tag larger than tagpacket!");
+            break;
+        }
+
         vector<uint8_t> tag_value(taglength);
         copy(   payload.begin() + i+8,
                 payload.begin() + i+8+taglength,
-- 
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