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Fix OTR whitespace tag detection to prevent false positives

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The previous implementation used strstr() which would match OTR tag patterns anywhere in the message. This caused normal messages containing these patterns to incorrectly trigger OTR session initialization.

Changed to use strncmp() to verify that V1/V2 tags immediately follow the base tag, ensuring only legitimate OTR whitespace tags trigger session establishment.

Fixes #1957
This commit is contained in:
aryansri05
2025-10-19 00:11:36 +05:30
committed by Steffen Jaeckel
parent 58d130a0a9
commit cff26a97af
1 changed files with 2 additions and 1 deletions
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3
src/otr/otr.c
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@@ -296,7 +296,8 @@ otr_on_message_recv(const char* const barejid, const char* const resource, const
// check for OTR whitespace (opportunistic or always)
if (policy == PROF_OTRPOLICY_OPPORTUNISTIC || policy == PROF_OTRPOLICY_ALWAYS) {
if (whitespace_base) {
if (strstr(message, OTRL_MESSAGE_TAG_V2) || strstr(message, OTRL_MESSAGE_TAG_V1)) {
char* tag_position = whitespace_base + strlen(OTRL_MESSAGE_TAG_BASE);
if (strncmp(tag_position, OTRL_MESSAGE_TAG_V2, strlen(OTRL_MESSAGE_TAG_V2)) == 0 || strncmp(tag_position, OTRL_MESSAGE_TAG_V1, strlen(OTRL_MESSAGE_TAG_V1)) == 0) {
// Remove whitespace pattern for proper display in UI
// Handle both BASE+TAGV1/2(16+8) and BASE+TAGV1+TAGV2(16+8+8)
int tag_length = 24;