Adjust all accesses to EVP_MD_CTX to use accessor functions.

Reviewed-by: Rich Salz <rsalz@openssl.org>

test/sha512t.c

diff --git a/test/sha512t.c b/test/sha512t.c
index f60d319..215a71f 100644
--- a/test/sha512t.c
+++ b/test/sha512t.c
@@ -75,7 +75,7 @@
 {
     unsigned char md[SHA512_DIGEST_LENGTH];
     int i;
-    EVP_MD_CTX evp;
+    EVP_MD_CTX *evp;
 
 # ifdef OPENSSL_IA32_SSE2
     /*
@@ -113,10 +113,15 @@
         fprintf(stdout, ".");
     fflush(stdout);
 
-    EVP_MD_CTX_init(&evp);
-    EVP_DigestInit_ex(&evp, EVP_sha512(), NULL);
+    evp = EVP_MD_CTX_create();
+    if (evp == NULL) {
+        fflush(stdout);
+        fprintf(stderr, "\nTEST 3 of 3 failed. (malloc failure)\n");
+        return 1;
+    }
+    EVP_DigestInit_ex(evp, EVP_sha512(), NULL);
     for (i = 0; i < 1000000; i += 288)
-        EVP_DigestUpdate(&evp, "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
+        EVP_DigestUpdate(evp, "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                          "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                          "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                          "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
@@ -126,8 +131,8 @@
                          "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                          "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa",
                          (1000000 - i) < 288 ? 1000000 - i : 288);
-    EVP_DigestFinal_ex(&evp, md, NULL);
-    EVP_MD_CTX_cleanup(&evp);
+    EVP_DigestFinal_ex(evp, md, NULL);
+    EVP_MD_CTX_cleanup(evp);
 
     if (memcmp(md, app_c3, sizeof(app_c3))) {
         fflush(stdout);
@@ -163,14 +168,13 @@
         fprintf(stdout, ".");
     fflush(stdout);
 
-    EVP_MD_CTX_init(&evp);
-    EVP_DigestInit_ex(&evp, EVP_sha384(), NULL);
+    EVP_DigestInit_ex(evp, EVP_sha384(), NULL);
     for (i = 0; i < 1000000; i += 64)
-        EVP_DigestUpdate(&evp, "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
+        EVP_DigestUpdate(evp, "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa"
                          "aaaaaaaa" "aaaaaaaa" "aaaaaaaa" "aaaaaaaa",
                          (1000000 - i) < 64 ? 1000000 - i : 64);
-    EVP_DigestFinal_ex(&evp, md, NULL);
-    EVP_MD_CTX_cleanup(&evp);
+    EVP_DigestFinal_ex(evp, md, NULL);
+    EVP_MD_CTX_destroy(evp);
 
     if (memcmp(md, app_d3, sizeof(app_d3))) {
         fflush(stdout);