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[v4,09/37] crypto: Add aesenc_SB_SR_MC_AK

Message ID 20230703100520.68224-10-richard.henderson@linaro.org
State Superseded
Headers show
Series crypto: Provide aes-round.h and host accel | expand

Commit Message

Richard Henderson July 3, 2023, 10:04 a.m. UTC 
Add a primitive for SubBytes + ShiftRows + MixColumns + AddRoundKey.

Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 host/include/generic/host/crypto/aes-round.h |  3 +
 include/crypto/aes-round.h                   | 21 +++++++
 crypto/aes.c                                 | 58 ++++++++++++++++++++
 3 files changed, 82 insertions(+)
diff mbox series

Patch

diff --git a/host/include/generic/host/crypto/aes-round.h b/host/include/generic/host/crypto/aes-round.h
index 335ec3f11e..9886e81e50 100644
--- a/host/include/generic/host/crypto/aes-round.h
+++ b/host/include/generic/host/crypto/aes-round.h
@@ -14,6 +14,9 @@  void aesenc_MC_accel(AESState *, const AESState *, bool)
 void aesenc_SB_SR_AK_accel(AESState *, const AESState *,
                            const AESState *, bool)
     QEMU_ERROR("unsupported accel");
+void aesenc_SB_SR_MC_AK_accel(AESState *, const AESState *,
+                              const AESState *, bool)
+    QEMU_ERROR("unsupported accel");
 
 void aesdec_IMC_accel(AESState *, const AESState *, bool)
     QEMU_ERROR("unsupported accel");
diff --git a/include/crypto/aes-round.h b/include/crypto/aes-round.h
index 7be2cc0d8e..03688c8640 100644
--- a/include/crypto/aes-round.h
+++ b/include/crypto/aes-round.h
@@ -59,6 +59,27 @@  static inline void aesenc_SB_SR_AK(AESState *r, const AESState *st,
     }
 }
 
+/*
+ * Perform SubBytes + ShiftRows + MixColumns + AddRoundKey.
+ */
+
+void aesenc_SB_SR_MC_AK_gen(AESState *ret, const AESState *st,
+                            const AESState *rk);
+void aesenc_SB_SR_MC_AK_genrev(AESState *ret, const AESState *st,
+                               const AESState *rk);
+
+static inline void aesenc_SB_SR_MC_AK(AESState *r, const AESState *st,
+                                      const AESState *rk, bool be)
+{
+    if (HAVE_AES_ACCEL) {
+        aesenc_SB_SR_MC_AK_accel(r, st, rk, be);
+    } else if (HOST_BIG_ENDIAN == be) {
+        aesenc_SB_SR_MC_AK_gen(r, st, rk);
+    } else {
+        aesenc_SB_SR_MC_AK_genrev(r, st, rk);
+    }
+}
+
 /*
  * Perform InvMixColumns.
  */
diff --git a/crypto/aes.c b/crypto/aes.c
index 6c05d731f4..a193d98d54 100644
--- a/crypto/aes.c
+++ b/crypto/aes.c
@@ -1322,6 +1322,64 @@  void aesenc_SB_SR_AK_genrev(AESState *r, const AESState *s, const AESState *k)
     aesenc_SB_SR_AK_swap(r, s, k, true);
 }
 
+/*
+ * Perform SubBytes + ShiftRows + MixColumns + AddRoundKey.
+ */
+static inline void
+aesenc_SB_SR_MC_AK_swap(AESState *r, const AESState *st,
+                        const AESState *rk, bool swap)
+{
+    int swap_b = swap * 0xf;
+    int swap_w = swap * 0x3;
+    bool be = HOST_BIG_ENDIAN ^ swap;
+    uint32_t w0, w1, w2, w3;
+
+    w0 = (AES_Te0[st->b[swap_b ^ AES_SH(0x0)]] ^
+          AES_Te1[st->b[swap_b ^ AES_SH(0x1)]] ^
+          AES_Te2[st->b[swap_b ^ AES_SH(0x2)]] ^
+          AES_Te3[st->b[swap_b ^ AES_SH(0x3)]]);
+
+    w1 = (AES_Te0[st->b[swap_b ^ AES_SH(0x4)]] ^
+          AES_Te1[st->b[swap_b ^ AES_SH(0x5)]] ^
+          AES_Te2[st->b[swap_b ^ AES_SH(0x6)]] ^
+          AES_Te3[st->b[swap_b ^ AES_SH(0x7)]]);
+
+    w2 = (AES_Te0[st->b[swap_b ^ AES_SH(0x8)]] ^
+          AES_Te1[st->b[swap_b ^ AES_SH(0x9)]] ^
+          AES_Te2[st->b[swap_b ^ AES_SH(0xA)]] ^
+          AES_Te3[st->b[swap_b ^ AES_SH(0xB)]]);
+
+    w3 = (AES_Te0[st->b[swap_b ^ AES_SH(0xC)]] ^
+          AES_Te1[st->b[swap_b ^ AES_SH(0xD)]] ^
+          AES_Te2[st->b[swap_b ^ AES_SH(0xE)]] ^
+          AES_Te3[st->b[swap_b ^ AES_SH(0xF)]]);
+
+    /* Note that AES_TeX is encoded for big-endian. */
+    if (!be) {
+        w0 = bswap32(w0);
+        w1 = bswap32(w1);
+        w2 = bswap32(w2);
+        w3 = bswap32(w3);
+    }
+
+    r->w[swap_w ^ 0] = rk->w[swap_w ^ 0] ^ w0;
+    r->w[swap_w ^ 1] = rk->w[swap_w ^ 1] ^ w1;
+    r->w[swap_w ^ 2] = rk->w[swap_w ^ 2] ^ w2;
+    r->w[swap_w ^ 3] = rk->w[swap_w ^ 3] ^ w3;
+}
+
+void aesenc_SB_SR_MC_AK_gen(AESState *r, const AESState *st,
+                            const AESState *rk)
+{
+    aesenc_SB_SR_MC_AK_swap(r, st, rk, false);
+}
+
+void aesenc_SB_SR_MC_AK_genrev(AESState *r, const AESState *st,
+                               const AESState *rk)
+{
+    aesenc_SB_SR_MC_AK_swap(r, st, rk, true);
+}
+
 /*
  * Perform InvMixColumns.
  */