crypto: Add aesdec_ISB_ISR_AK_IMC

Add a primitive for InvSubBytes + InvShiftRows + AddRoundKey + InvMixColumns. Acked-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
qemu · Jul 8, 2023 · 28e9147 · 28e9147
1 parent 15ff159
commit 28e9147
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diff --git a/crypto/aes.c b/crypto/aes.c
@@ -1542,6 +1542,20 @@ void aesdec_ISB_ISR_IMC_AK_genrev(AESState *r, const AESState *st,
     aesdec_ISB_ISR_IMC_AK_swap(r, st, rk, true);
 }
 
+void aesdec_ISB_ISR_AK_IMC_gen(AESState *ret, const AESState *st,
+                               const AESState *rk)
+{
+    aesdec_ISB_ISR_AK_gen(ret, st, rk);
+    aesdec_IMC_gen(ret, ret);
+}
+
+void aesdec_ISB_ISR_AK_IMC_genrev(AESState *ret, const AESState *st,
+                                  const AESState *rk)
+{
+    aesdec_ISB_ISR_AK_genrev(ret, st, rk);
+    aesdec_IMC_genrev(ret, ret);
+}
+
 /**
  * Expand the cipher key into the encryption key schedule.
  */

diff --git a/host/include/generic/host/crypto/aes-round.h b/host/include/generic/host/crypto/aes-round.h
@@ -23,6 +23,9 @@ void aesdec_IMC_accel(AESState *, const AESState *, bool)
 void aesdec_ISB_ISR_AK_accel(AESState *, const AESState *,
                              const AESState *, bool)
     QEMU_ERROR("unsupported accel");
+void aesdec_ISB_ISR_AK_IMC_accel(AESState *, const AESState *,
+                                 const AESState *, bool)
+    QEMU_ERROR("unsupported accel");
 void aesdec_ISB_ISR_IMC_AK_accel(AESState *, const AESState *,
                                  const AESState *, bool)
     QEMU_ERROR("unsupported accel");

diff --git a/include/crypto/aes-round.h b/include/crypto/aes-round.h
@@ -119,6 +119,27 @@ static inline void aesdec_ISB_ISR_AK(AESState *r, const AESState *st,
     }
 }
 
+/*
+ * Perform InvSubBytes + InvShiftRows + AddRoundKey + InvMixColumns.
+ */
+
+void aesdec_ISB_ISR_AK_IMC_gen(AESState *ret, const AESState *st,
+                               const AESState *rk);
+void aesdec_ISB_ISR_AK_IMC_genrev(AESState *ret, const AESState *st,
+                                  const AESState *rk);
+
+static inline void aesdec_ISB_ISR_AK_IMC(AESState *r, const AESState *st,
+                                         const AESState *rk, bool be)
+{
+    if (HAVE_AES_ACCEL) {
+        aesdec_ISB_ISR_AK_IMC_accel(r, st, rk, be);
+    } else if (HOST_BIG_ENDIAN == be) {
+        aesdec_ISB_ISR_AK_IMC_gen(r, st, rk);
+    } else {
+        aesdec_ISB_ISR_AK_IMC_genrev(r, st, rk);
+    }
+}
+
 /*
  * Perform InvSubBytes + InvShiftRows + InvMixColumns + AddRoundKey.
  */