lib-otp: Use for-loop instead while

Avoids unsigned integer wrap

diff --git a/src/lib-otp/otp-hash.c b/src/lib-otp/otp-hash.c
index 0ad90bece4022f9851f6bc2e2209a18eb5bd7fab..c1b6f72c2bcf1a3ba295c863060353a034329d9a 100644 (file)
--- a/src/lib-otp/otp-hash.c
+++ b/src/lib-otp/otp-hash.c
@@ -147,7 +147,7 @@ void otp_hash(unsigned int algo, const char *seed, const char *passphrase,
        digest_update(&ctx, passphrase, strlen(passphrase));
        digest_otp_final(&ctx, result);
 
-       while (step-- > 0) {
+       for (unsigned int i = 0; i < step; i++) {
                digest_init(&ctx, algo);
                digest_update(&ctx, result, OTP_HASH_SIZE);
                digest_otp_final(&ctx, result);