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-rw-r--r--crypto/sha2.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/sha2.c b/crypto/sha2.c
index 26162e83e6..00a1af3419 100644
--- a/crypto/sha2.c
+++ b/crypto/sha2.c
@@ -208,7 +208,7 @@ static void sha2_update(sha2_context * ctx, const uint8_t * input, size_t length
size_t fill;
uint32_t left;
- if (length <= 0)
+ if (length == 0)
return;
left = ctx->total[0] & 0x3F;