1 files changed, 112 insertions, 0 deletions
diff --git a/test/monniaux/BearSSL/src/symcipher/aes_ct_enc.c b/test/monniaux/BearSSL/src/symcipher/aes_ct_enc.c
new file mode 100644
index 00000000..089bf356
--- /dev/null
+++ b/test/monniaux/BearSSL/src/symcipher/aes_ct_enc.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be 
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "inner.h"
+
+static inline void
+add_round_key(uint32_t *q, const uint32_t *sk)
+{
+	q[0] ^= sk[0];
+	q[1] ^= sk[1];
+	q[2] ^= sk[2];
+	q[3] ^= sk[3];
+	q[4] ^= sk[4];
+	q[5] ^= sk[5];
+	q[6] ^= sk[6];
+	q[7] ^= sk[7];
+}
+
+static inline void
+shift_rows(uint32_t *q)
+{
+	int i;
+
+	for (i = 0; i < 8; i ++) {
+		uint32_t x;
+
+		x = q[i];
+		q[i] = (x & 0x000000FF)
+			| ((x & 0x0000FC00) >> 2) | ((x & 0x00000300) << 6)
+			| ((x & 0x00F00000) >> 4) | ((x & 0x000F0000) << 4)
+			| ((x & 0xC0000000) >> 6) | ((x & 0x3F000000) << 2);
+	}
+}
+
+static inline uint32_t
+rotr16(uint32_t x)
+{
+	return (x << 16) | (x >> 16);
+}
+
+static inline void
+mix_columns(uint32_t *q)
+{
+	uint32_t q0, q1, q2, q3, q4, q5, q6, q7;
+	uint32_t r0, r1, r2, r3, r4, r5, r6, r7;
+
+	q0 = q[0];
+	q1 = q[1];
+	q2 = q[2];
+	q3 = q[3];
+	q4 = q[4];
+	q5 = q[5];
+	q6 = q[6];
+	q7 = q[7];
+	r0 = (q0 >> 8) | (q0 << 24);
+	r1 = (q1 >> 8) | (q1 << 24);
+	r2 = (q2 >> 8) | (q2 << 24);
+	r3 = (q3 >> 8) | (q3 << 24);
+	r4 = (q4 >> 8) | (q4 << 24);
+	r5 = (q5 >> 8) | (q5 << 24);
+	r6 = (q6 >> 8) | (q6 << 24);
+	r7 = (q7 >> 8) | (q7 << 24);
+
+	q[0] = q7 ^ r7 ^ r0 ^ rotr16(q0 ^ r0);
+	q[1] = q0 ^ r0 ^ q7 ^ r7 ^ r1 ^ rotr16(q1 ^ r1);
+	q[2] = q1 ^ r1 ^ r2 ^ rotr16(q2 ^ r2);
+	q[3] = q2 ^ r2 ^ q7 ^ r7 ^ r3 ^ rotr16(q3 ^ r3);
+	q[4] = q3 ^ r3 ^ q7 ^ r7 ^ r4 ^ rotr16(q4 ^ r4);
+	q[5] = q4 ^ r4 ^ r5 ^ rotr16(q5 ^ r5);
+	q[6] = q5 ^ r5 ^ r6 ^ rotr16(q6 ^ r6);
+	q[7] = q6 ^ r6 ^ r7 ^ rotr16(q7 ^ r7);
+}
+
+/* see inner.h */
+void
+br_aes_ct_bitslice_encrypt(unsigned num_rounds,
+	const uint32_t *skey, uint32_t *q)
+{
+	unsigned u;
+
+	add_round_key(q, skey);
+	for (u = 1; u < num_rounds; u ++) {
+		br_aes_ct_bitslice_Sbox(q);
+		shift_rows(q);
+		mix_columns(q);
+		add_round_key(q, skey + (u << 3));
+	}
+	br_aes_ct_bitslice_Sbox(q);
+	shift_rows(q);
+	add_round_key(q, skey + (num_rounds << 3));
+}