shm: re-introduce _oidc_strncpy as a __STDC_LIB_EXT1__ macro

possibly using strncpy_s (but not null-checking t->section_key, #1353!)

Signed-off-by: Hans Zandbelt <[email protected]>

Author: zandbelt

src/cache/shm.c

@@ -302,7 +302,7 @@ static apr_byte_t oidc_cache_shm_set(request_rec *r, const char *section, const
 	if (value != NULL) {
 
 		/* fill out the entry with the provided data */
-		_oidc_strcpy(t->section_key, section_key);
+		_oidc_strncpy(t->section_key, section_key, OIDC_CACHE_SHM_KEY_MAX - 1);
 		_oidc_strcpy(t->value, value);
 		t->expires = expiry;
 		t->access = current_time;

src/const.h

@@ -70,10 +70,12 @@
 #define _oidc_memset(b, c, __len) memset_s(b, __len, c, __len)
 #define _oidc_memcpy(__dst, __src, __n) memcpy_s(__dst, __src, __n)
 #define _oidc_strcpy(__dst, __src) strcpy_s(__dst, __src)
+#define _oidc_strncpy(__dst, __src, __n) strncpy_s(__dst, __src, __n)
 #else
 #define _oidc_memset(b, c, __len) memset(b, c, __len)
 #define _oidc_memcpy(__dst, __src, __n) memcpy(__dst, __src, __n)
 #define _oidc_strcpy(__dst, __src) strcpy(__dst, __src)
+#define _oidc_strncpy(__dst, __src, __n) strncpy(__dst, __src, __n)
 #endif
 
 static inline size_t _oidc_strlen(const char *s) {