Import OpenSSL 1.1.1h.vendor/openssl/1.1.1h

1 files changed, 14 insertions, 7 deletions

diff --git a/crypto/cmac/cmac.c b/crypto/cmac/cmac.c
index 6989c32d0660..1fac53101687 100644
--- a/crypto/cmac/cmac.c
+++ b/crypto/cmac/cmac.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2010-2020 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
@@ -116,11 +116,18 @@ int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen,
         return 1;
     }
     /* Initialise context */
-    if (cipher && !EVP_EncryptInit_ex(ctx->cctx, cipher, impl, NULL, NULL))
-        return 0;
+    if (cipher != NULL) {
+        /* Ensure we can't use this ctx until we also have a key */
+        ctx->nlast_block = -1;
+        if (!EVP_EncryptInit_ex(ctx->cctx, cipher, impl, NULL, NULL))
+            return 0;
+    }
     /* Non-NULL key means initialisation complete */
-    if (key) {
+    if (key != NULL) {
         int bl;
+
+        /* If anything fails then ensure we can't use this ctx */
+        ctx->nlast_block = -1;
         if (!EVP_CIPHER_CTX_cipher(ctx->cctx))
             return 0;
         if (!EVP_CIPHER_CTX_set_key_length(ctx->cctx, keylen))
@@ -128,7 +135,7 @@ int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen,
         if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, key, zero_iv))
             return 0;
         bl = EVP_CIPHER_CTX_block_size(ctx->cctx);
-        if (!EVP_Cipher(ctx->cctx, ctx->tbl, zero_iv, bl))
+        if (EVP_Cipher(ctx->cctx, ctx->tbl, zero_iv, bl) <= 0)
             return 0;
         make_kn(ctx->k1, ctx->tbl, bl);
         make_kn(ctx->k2, ctx->k1, bl);
@@ -166,12 +173,12 @@ int CMAC_Update(CMAC_CTX *ctx, const void *in, size_t dlen)
             return 1;
         data += nleft;
         /* Else not final block so encrypt it */
-        if (!EVP_Cipher(ctx->cctx, ctx->tbl, ctx->last_block, bl))
+        if (EVP_Cipher(ctx->cctx, ctx->tbl, ctx->last_block, bl) <= 0)
             return 0;
     }
     /* Encrypt all but one of the complete blocks left */
     while (dlen > bl) {
-        if (!EVP_Cipher(ctx->cctx, ctx->tbl, data, bl))
+        if (EVP_Cipher(ctx->cctx, ctx->tbl, data, bl) <= 0)
             return 0;
         dlen -= bl;
         data += bl;