res_crypto.c: Gracefully handle potential key filename truncation.

Partially resolves .
pull/38/head
Sean Bright 2 years ago
parent a36af23f20
commit e06bb85ad3

@ -196,7 +196,14 @@ static struct ast_key *try_load_key(const char *dir, const char *fname, int ifd,
}
/* Get actual filename */
snprintf(ffname, sizeof(ffname), "%s/%s", dir, fname);
n = snprintf(ffname, sizeof(ffname), "%s/%s", dir, fname);
if (n >= sizeof(ffname)) {
ast_log(LOG_WARNING,
"Key filenames can be up to %zu bytes long, but the filename for the"
" key we are currently trying to load (%s/%s) is %d bytes long.",
sizeof(ffname) - 1, dir, fname, n);
return NULL;
}
/* Open file */
if (!(f = fopen(ffname, "r"))) {

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