Fix UBSAN failure in b64decode_tinc()

[tinc] / src / utils.c

diff --git a/src/utils.c b/src/utils.c
index 231938d..8655e2b 100644 (file)
--- a/src/utils.c
+++ b/src/utils.c
@@ -138,7 +138,7 @@ size_t b64decode_tinc(const char *src, void *dst, size_t length) {
        unsigned char *udst = (unsigned char *)dst;
 
        for(i = 0; i < length && src[i]; i++) {
-               triplet |= base64_decode[src[i] & 0xff] << (6 * (i & 3));
+               triplet |= (uint32_t)(base64_decode[src[i] & 0xff] << (6 * (i & 3)));
 
                if((i & 3) == 3) {
                        if(triplet & 0xff000000U) {