md5: fix large size handling

Follow-up to dd7fcd581f68fb76198497d

Closes #21180

diff --git a/lib/md5.c b/lib/md5.c
index f44078ba1ea72096c26856391640ab925f76fbfb..b4b77e41627757e496e19bdd4a1f13254d5f17ee 100644 (file)
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -551,7 +551,7 @@ CURLcode Curl_md5it(unsigned char *output,
       unsigned int ilen = (unsigned int) CURLMIN(len, UINT_MAX);
       my_md5_update(&ctx, input, ilen);
       input += ilen;
-      len -= len;
+      len -= ilen;
     } while(len);
     my_md5_final(output, &ctx);
   }