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-rw-r--r--src/common/crypto.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/common/crypto.c b/src/common/crypto.c
index 424a6f417..05c1ce9ea 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -2145,13 +2145,14 @@ crypto_rand(char *to, size_t n)
}
/** Return a pseudorandom integer, chosen uniformly from the values
- * between 0 and <b>max</b>-1. */
+ * between 0 and <b>max</b>-1 inclusive. <b>max</b> must be between 1 and
+ * INT_MAX+1, inclusive. */
int
crypto_rand_int(unsigned int max)
{
unsigned int val;
unsigned int cutoff;
- tor_assert(max < UINT_MAX);
+ tor_assert(max <= ((unsigned int)INT_MAX)+1);
tor_assert(max > 0); /* don't div by 0 */
/* We ignore any values that are >= 'cutoff,' to avoid biasing the