1 files changed, 111 insertions, 0 deletions
diff --git a/test/monniaux/BearSSL/src/symcipher/aes_ct_cbcdec.c b/test/monniaux/BearSSL/src/symcipher/aes_ct_cbcdec.c
new file mode 100644
index 00000000..522645ad
--- /dev/null
+++ b/test/monniaux/BearSSL/src/symcipher/aes_ct_cbcdec.c
@@ -0,0 +1,111 @@
+/*
+ * 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"
+
+/* see bearssl_block.h */
+void
+br_aes_ct_cbcdec_init(br_aes_ct_cbcdec_keys *ctx,
+	const void *key, size_t len)
+{
+	ctx->vtable = &br_aes_ct_cbcdec_vtable;
+	ctx->num_rounds = br_aes_ct_keysched(ctx->skey, key, len);
+}
+
+/* see bearssl_block.h */
+void
+br_aes_ct_cbcdec_run(const br_aes_ct_cbcdec_keys *ctx,
+	void *iv, void *data, size_t len)
+{
+	unsigned char *buf, *ivbuf;
+	uint32_t iv0, iv1, iv2, iv3;
+	uint32_t sk_exp[120];
+
+	br_aes_ct_skey_expand(sk_exp, ctx->num_rounds, ctx->skey);
+	ivbuf = iv;
+	iv0 = br_dec32le(ivbuf);
+	iv1 = br_dec32le(ivbuf + 4);
+	iv2 = br_dec32le(ivbuf + 8);
+	iv3 = br_dec32le(ivbuf + 12);
+	buf = data;
+	while (len > 0) {
+		uint32_t q[8], sq[8];
+
+		q[0] = br_dec32le(buf);
+		q[2] = br_dec32le(buf + 4);
+		q[4] = br_dec32le(buf + 8);
+		q[6] = br_dec32le(buf + 12);
+		if (len >= 32) {
+			q[1] = br_dec32le(buf + 16);
+			q[3] = br_dec32le(buf + 20);
+			q[5] = br_dec32le(buf + 24);
+			q[7] = br_dec32le(buf + 28);
+		} else {
+			q[1] = 0;
+			q[3] = 0;
+			q[5] = 0;
+			q[7] = 0;
+		}
+		memcpy(sq, q, sizeof q);
+		br_aes_ct_ortho(q);
+		br_aes_ct_bitslice_decrypt(ctx->num_rounds, sk_exp, q);
+		br_aes_ct_ortho(q);
+		br_enc32le(buf, q[0] ^ iv0);
+		br_enc32le(buf + 4, q[2] ^ iv1);
+		br_enc32le(buf + 8, q[4] ^ iv2);
+		br_enc32le(buf + 12, q[6] ^ iv3);
+		if (len < 32) {
+			iv0 = sq[0];
+			iv1 = sq[2];
+			iv2 = sq[4];
+			iv3 = sq[6];
+			break;
+		}
+		br_enc32le(buf + 16, q[1] ^ sq[0]);
+		br_enc32le(buf + 20, q[3] ^ sq[2]);
+		br_enc32le(buf + 24, q[5] ^ sq[4]);
+		br_enc32le(buf + 28, q[7] ^ sq[6]);
+		iv0 = sq[1];
+		iv1 = sq[3];
+		iv2 = sq[5];
+		iv3 = sq[7];
+		buf += 32;
+		len -= 32;
+	}
+	br_enc32le(ivbuf, iv0);
+	br_enc32le(ivbuf + 4, iv1);
+	br_enc32le(ivbuf + 8, iv2);
+	br_enc32le(ivbuf + 12, iv3);
+}
+
+/* see bearssl_block.h */
+const br_block_cbcdec_class br_aes_ct_cbcdec_vtable = {
+	sizeof(br_aes_ct_cbcdec_keys),
+	16,
+	4,
+	(void (*)(const br_block_cbcdec_class **, const void *, size_t))
+		&br_aes_ct_cbcdec_init,
+	(void (*)(const br_block_cbcdec_class *const *, void *, void *, size_t))
+		&br_aes_ct_cbcdec_run
+};