Update pre10

crypto/hmac/hmac.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -18,8 +18,9 @@
 int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
                  const EVP_MD *md, ENGINE *impl)
 {
+    int rv = 0;
     int i, j, reset = 0;
-    unsigned char pad[HMAC_MAX_MD_CBLOCK];
+    unsigned char pad[HMAC_MAX_MD_CBLOCK_SIZE];
 
     /* If we are changing MD then we must have a key */
     if (md != NULL && md != ctx->md && (key == NULL || len < 0))
@@ -38,46 +39,44 @@ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
         reset = 1;
         j = EVP_MD_block_size(md);
         if (!ossl_assert(j <= (int)sizeof(ctx->key)))
-            goto err;
+            return 0;
         if (j < len) {
-            if (!EVP_DigestInit_ex(ctx->md_ctx, md, impl))
-                goto err;
-            if (!EVP_DigestUpdate(ctx->md_ctx, key, len))
-                goto err;
-            if (!EVP_DigestFinal_ex(ctx->md_ctx, ctx->key,
-                                    &ctx->key_length))
-                goto err;
+            if (!EVP_DigestInit_ex(ctx->md_ctx, md, impl)
+                    || !EVP_DigestUpdate(ctx->md_ctx, key, len)
+                    || !EVP_DigestFinal_ex(ctx->md_ctx, ctx->key,
+                                           &ctx->key_length))
+                return 0;
         } else {
             if (len < 0 || len > (int)sizeof(ctx->key))
                 return 0;
             memcpy(ctx->key, key, len);
             ctx->key_length = len;
         }
-        if (ctx->key_length != HMAC_MAX_MD_CBLOCK)
+        if (ctx->key_length != HMAC_MAX_MD_CBLOCK_SIZE)
             memset(&ctx->key[ctx->key_length], 0,
-                   HMAC_MAX_MD_CBLOCK - ctx->key_length);
+                   HMAC_MAX_MD_CBLOCK_SIZE - ctx->key_length);
     }
 
     if (reset) {
-        for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
+        for (i = 0; i < HMAC_MAX_MD_CBLOCK_SIZE; i++)
             pad[i] = 0x36 ^ ctx->key[i];
-        if (!EVP_DigestInit_ex(ctx->i_ctx, md, impl))
-            goto err;
-        if (!EVP_DigestUpdate(ctx->i_ctx, pad, EVP_MD_block_size(md)))
+        if (!EVP_DigestInit_ex(ctx->i_ctx, md, impl)
+                || !EVP_DigestUpdate(ctx->i_ctx, pad, EVP_MD_block_size(md)))
             goto err;
 
-        for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
+        for (i = 0; i < HMAC_MAX_MD_CBLOCK_SIZE; i++)
             pad[i] = 0x5c ^ ctx->key[i];
-        if (!EVP_DigestInit_ex(ctx->o_ctx, md, impl))
-            goto err;
-        if (!EVP_DigestUpdate(ctx->o_ctx, pad, EVP_MD_block_size(md)))
+        if (!EVP_DigestInit_ex(ctx->o_ctx, md, impl)
+                || !EVP_DigestUpdate(ctx->o_ctx, pad, EVP_MD_block_size(md)))
             goto err;
     }
     if (!EVP_MD_CTX_copy_ex(ctx->md_ctx, ctx->i_ctx))
         goto err;
-    return 1;
+    rv = 1;
  err:
-    return 0;
+    if (reset)
+        OPENSSL_cleanse(pad, sizeof(pad));
+    return rv;
 }
 
 #if OPENSSL_API_COMPAT < 0x10100000L
@@ -195,7 +194,7 @@ int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx)
         goto err;
     if (!EVP_MD_CTX_copy_ex(dctx->md_ctx, sctx->md_ctx))
         goto err;
-    memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK);
+    memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK_SIZE);
     dctx->key_length = sctx->key_length;
     dctx->md = sctx->md;
     return 1;

crypto/hmac/hmac_lcl.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -10,13 +10,16 @@
 #ifndef HEADER_HMAC_LCL_H
 # define HEADER_HMAC_LCL_H
 
+/* The current largest case is for SHA3-224 */
+#define HMAC_MAX_MD_CBLOCK_SIZE     144
+
 struct hmac_ctx_st {
     const EVP_MD *md;
     EVP_MD_CTX *md_ctx;
     EVP_MD_CTX *i_ctx;
     EVP_MD_CTX *o_ctx;
     unsigned int key_length;
-    unsigned char key[HMAC_MAX_MD_CBLOCK];
+    unsigned char key[HMAC_MAX_MD_CBLOCK_SIZE];
 };
 
 #endif