Add helper to validate if TLV value is a valid UTF8 string.
Note that both null-terminated and non null-terminated UTF8
strings are considered valid.
---
src/simutil.c | 14 ++++++++++++++
src/simutil.h | 1 +
2 files changed, 15 insertions(+)
diff --git a/src/simutil.c b/src/simutil.c
index 4e0d3311..5808b14e 100644
--- a/src/simutil.c
+++ b/src/simutil.c
@@ -765,6 +765,20 @@ unsigned char *comprehension_tlv_builder_get_data(
return tlv + tag_size + len_size;
}
+gboolean validate_utf8_tlv(const unsigned char *tlv)
+{
+ int len = tlv[1];
+
+ if (len == 0)
+ return FALSE;
+
+ /* support both null-termiated and non null-terminated UTF8 TLV value */
+ if (tlv[len + 1] == '\0')
+ len -= 1;
+
+ return g_utf8_validate_len((const char *)tlv + 2, len, NULL);
+}
+
static char *sim_network_name_parse(const unsigned char *buffer, int length,
gboolean *add_ci)
{
diff --git a/src/simutil.h b/src/simutil.h
index 14a39957..33b775a7 100644
--- a/src/simutil.h
+++ b/src/simutil.h
@@ -403,6 +403,7 @@ gboolean comprehension_tlv_builder_set_length(
unsigned int len);
unsigned char *comprehension_tlv_builder_get_data(
struct comprehension_tlv_builder *builder);
+gboolean validate_utf8_tlv(const unsigned char *data);
void ber_tlv_iter_init(struct ber_tlv_iter *iter, const unsigned char *pdu,
unsigned int len);
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