Fix segfault when failing to read random numbers.

[tinc] / src / nolegacy / crypto.c

diff --git a/src/nolegacy/crypto.c b/src/nolegacy/crypto.c
index 44692fd..d6e2ce1 100644 (file)
--- a/src/nolegacy/crypto.c
+++ b/src/nolegacy/crypto.c
@@ -42,12 +42,14 @@ static void random_exit(void) {
        close(random_fd);
 }
 
-void randomize(void *out, size_t outlen) {
+void randomize(void *vout, size_t outlen) {
+       char *out = vout;
+
        while(outlen) {
-               size_t len = read(random_fd, out, outlen);
+               ssize_t len = read(random_fd, out, outlen);
 
                if(len <= 0) {
-                       if(errno == EAGAIN || errno == EINTR) {
+                       if(len == -1 && (errno == EAGAIN || errno == EINTR)) {
                                continue;
                        }