commit 669981b3b14dd16dec42089d6ac8d6449fde8abd
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Wed Feb 12 21:12:53 2020 -0800
committer GitHub <noreply@github.com> Wed Feb 12 21:12:53 2020 -0800
tree ae7bb92dc4c4ec5957b91d25cfcdc8fdb871d810
parent 2076d4f97ef514bb4dc4ca768fbaa3f538ce7f1f

closes bpo-39621: Make buf arg to md5_compress be const. (GH-18497)

(cherry picked from commit 597ebed748d0b0c061f8c108bd98270d103286c1)

Co-authored-by: Andy Lester <andy@petdance.com>

Modules/md5module.c

diff --git a/Modules/md5module.c b/Modules/md5module.c
index b9a351a..c2ebaaf 100644
--- a/Modules/md5module.c
+++ b/Modules/md5module.c
@@ -119,7 +119,7 @@
     a = (a + I(b,c,d) + M + t); a = ROLc(a, s) + b;
 
 
-static void md5_compress(struct md5_state *md5, unsigned char *buf)
+static void md5_compress(struct md5_state *md5, const unsigned char *buf)
 {
     MD5_INT32 i, W[16], a, b, c, d;
 
@@ -242,7 +242,7 @@
 
     while (inlen > 0) {
         if (md5->curlen == 0 && inlen >= MD5_BLOCKSIZE) {
-           md5_compress(md5, (unsigned char *)in);
+           md5_compress(md5, in);
            md5->length    += MD5_BLOCKSIZE * 8;
            in             += MD5_BLOCKSIZE;
            inlen          -= MD5_BLOCKSIZE;