commit 111159b89c08b6f691b4fe33a2732f4bf84da9a9
author Yanray Wang <yanray.wang@arm.com> Fri Nov 10 13:41:12 2023 +0800
committer Yanray Wang <yanray.wang@arm.com> Fri Nov 10 15:03:23 2023 +0800
tree 3109c7e0b1ad96376fdb5097cbd291a827e6744b
parent 799bd84b0d50790a335d2ba9930687b3fb4f9df7

BLOCK_CIPHER_NO_DECRYPT: call encrypt direction unconditionally

Signed-off-by: Yanray Wang <yanray.wang@arm.com>

library/aesni.c

diff --git a/library/aesni.c b/library/aesni.c
index 6c917da..c68b081 100644
--- a/library/aesni.c
+++ b/library/aesni.c
@@ -93,24 +93,25 @@
     ++rk;
     --nr;
 
-    if (mode == MBEDTLS_AES_ENCRYPT) {
-        while (nr != 0) {
-            state = _mm_aesenc_si128(state, *rk);
-            ++rk;
-            --nr;
-        }
-        state = _mm_aesenclast_si128(state, *rk);
-    } else {
 #if !defined(MBEDTLS_BLOCK_CIPHER_NO_DECRYPT)
+    if (mode == MBEDTLS_AES_DECRYPT) {
         while (nr != 0) {
             state = _mm_aesdec_si128(state, *rk);
             ++rk;
             --nr;
         }
         state = _mm_aesdeclast_si128(state, *rk);
+    } else
 #else
-        return MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE;
+    (void) mode;
 #endif
+    {
+        while (nr != 0) {
+            state = _mm_aesenc_si128(state, *rk);
+            ++rk;
+            --nr;
+        }
+        state = _mm_aesenclast_si128(state, *rk);
     }
 
     memcpy(output, &state, 16);
@@ -445,12 +446,6 @@
                             const unsigned char input[16],
                             unsigned char output[16])
 {
-#if defined(MBEDTLS_BLOCK_CIPHER_NO_DECRYPT)
-    if (mode == MBEDTLS_AES_DECRYPT) {
-        return MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE;
-    }
-#endif
-
     asm ("movdqu    (%3), %%xmm0    \n\t" // load input
          "movdqu    (%1), %%xmm1    \n\t" // load round key 0
          "pxor      %%xmm1, %%xmm0  \n\t" // round 0