diff --git a/aes/host/main.c b/aes/host/main.c
new file mode 100644
index 0000000..7c9d79e
--- /dev/null
+++ b/aes/host/main.c
@@ -0,0 +1,210 @@
+/*
+ * Copyright (c) 2017, Linaro Limited
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+
+/* OP-TEE TEE client API (built by optee_client) */
+#include <tee_client_api.h>
+
+/* To the the UUID (found the the TA's h-file(s)) */
+#include <aes_ta.h>
+
+#define AES_TEST_BUFFER_SIZE	4096
+#define AES_TEST_KEY_SIZE	16
+
+#define DECODE			0
+#define ENCODE			1
+
+/* TEE resources */
+struct test_ctx {
+	TEEC_Context ctx;
+	TEEC_Session sess;
+};
+
+void prepare_tee_session(struct test_ctx *ctx)
+{
+	TEEC_UUID uuid = TA_AES_UUID;
+	uint32_t origin;
+	TEEC_Result res;
+
+	/* Initialize a context connecting us to the TEE */
+	res = TEEC_InitializeContext(NULL, &ctx->ctx);
+	if (res != TEEC_SUCCESS)
+		errx(1, "TEEC_InitializeContext failed with code 0x%x", res);
+
+	/* Open a session with the TA */
+	res = TEEC_OpenSession(&ctx->ctx, &ctx->sess, &uuid,
+			       TEEC_LOGIN_PUBLIC, NULL, NULL, &origin);
+	if (res != TEEC_SUCCESS)
+		errx(1, "TEEC_Opensession failed with code 0x%x origin 0x%x",
+			res, origin);
+}
+
+void terminate_tee_session(struct test_ctx *ctx)
+{
+	TEEC_CloseSession(&ctx->sess);
+	TEEC_FinalizeContext(&ctx->ctx);
+}
+
+void prepare_aes(struct test_ctx *ctx, int encode)
+{
+	TEEC_Operation op;
+	uint32_t origin;
+	TEEC_Result res;
+
+	memset(&op, 0, sizeof(op));
+	op.paramTypes = TEEC_PARAM_TYPES(TEEC_VALUE_INPUT,
+					 TEEC_VALUE_INPUT,
+					 TEEC_VALUE_INPUT,
+					 TEEC_NONE);
+
+	op.params[0].value.a = TA_AES_ALGO_CTR;
+	op.params[1].value.a = TA_AES_SIZE_128BIT;
+	op.params[2].value.a = encode ? TA_AES_MODE_ENCODE :
+					TA_AES_MODE_DECODE;
+
+	res = TEEC_InvokeCommand(&ctx->sess, TA_AES_CMD_PREPARE,
+				 &op, &origin);
+	if (res != TEEC_SUCCESS)
+		errx(1, "TEEC_InvokeCommand(PREPARE) failed 0x%x origin 0x%x",
+			res, origin);
+}
+
+void set_key(struct test_ctx *ctx, char *key, size_t key_sz)
+{
+	TEEC_Operation op;
+	uint32_t origin;
+	TEEC_Result res;
+
+	memset(&op, 0, sizeof(op));
+	op.paramTypes = TEEC_PARAM_TYPES(TEEC_MEMREF_TEMP_INPUT,
+					 TEEC_NONE, TEEC_NONE, TEEC_NONE);
+
+	op.params[0].tmpref.buffer = key;
+	op.params[0].tmpref.size = key_sz;
+
+	res = TEEC_InvokeCommand(&ctx->sess, TA_AES_CMD_SET_KEY,
+				 &op, &origin);
+	if (res != TEEC_SUCCESS)
+		errx(1, "TEEC_InvokeCommand(SET_KEY) failed 0x%x origin 0x%x",
+			res, origin);
+}
+
+void set_iv(struct test_ctx *ctx, char *iv, size_t iv_sz)
+{
+	TEEC_Operation op;
+	uint32_t origin;
+	TEEC_Result res;
+
+	memset(&op, 0, sizeof(op));
+	op.paramTypes = TEEC_PARAM_TYPES(TEEC_MEMREF_TEMP_INPUT,
+					  TEEC_NONE, TEEC_NONE, TEEC_NONE);
+	op.params[0].tmpref.buffer = iv;
+	op.params[0].tmpref.size = iv_sz;
+
+	res = TEEC_InvokeCommand(&ctx->sess, TA_AES_CMD_SET_IV,
+				 &op, &origin);
+	if (res != TEEC_SUCCESS)
+		errx(1, "TEEC_InvokeCommand(SET_IV) failed 0x%x origin 0x%x",
+			res, origin);
+}
+
+void cipher_buffer(struct test_ctx *ctx, char *in, char *out, size_t sz)
+{
+	TEEC_Operation op;
+	uint32_t origin;
+	TEEC_Result res;
+
+	memset(&op, 0, sizeof(op));
+	op.paramTypes = TEEC_PARAM_TYPES(TEEC_MEMREF_TEMP_INPUT,
+					 TEEC_MEMREF_TEMP_OUTPUT,
+					 TEEC_NONE, TEEC_NONE);
+	op.params[0].tmpref.buffer = in;
+	op.params[0].tmpref.size = sz;
+	op.params[1].tmpref.buffer = out;
+	op.params[1].tmpref.size = sz;
+
+	res = TEEC_InvokeCommand(&ctx->sess, TA_AES_CMD_CIPHER,
+				 &op, &origin);
+	if (res != TEEC_SUCCESS)
+		errx(1, "TEEC_InvokeCommand(CIPHER) failed 0x%x origin 0x%x",
+			res, origin);
+}
+
+int main(int argc, char *argv[])
+{
+	struct test_ctx ctx;
+	char key[AES_TEST_KEY_SIZE];
+	char iv[AES_TEST_KEY_SIZE];
+	char clear[AES_TEST_BUFFER_SIZE];
+	char ciph[AES_TEST_BUFFER_SIZE];
+	char temp[AES_TEST_BUFFER_SIZE];
+
+	printf("Prepare session with the TA\n");
+	prepare_tee_session(&ctx);
+
+	printf("Prepare encode operation\n");
+	prepare_aes(&ctx, ENCODE);
+
+	printf("Load key in TA\n");
+	memset(key, 0xa5, sizeof(key)); /* Load some dummy value */
+	set_key(&ctx, key, AES_TEST_KEY_SIZE);
+
+	printf("Reset ciphering operation in TA (provides the initial vector)\n");
+	memset(iv, 0, sizeof(iv)); /* Load some dummy value */
+	set_iv(&ctx, iv, AES_TEST_KEY_SIZE);
+
+	printf("Encore buffer from TA\n");
+	memset(clear, 0x5a, sizeof(clear)); /* Load some dummy value */
+	cipher_buffer(&ctx, clear, ciph, AES_TEST_BUFFER_SIZE);
+
+	printf("Prepare decode operation\n");
+	prepare_aes(&ctx, DECODE);
+
+	printf("Load key in TA\n");
+	memset(key, 0xa5, sizeof(key)); /* Load some dummy value */
+	set_key(&ctx, key, AES_TEST_KEY_SIZE);
+
+	printf("Reset ciphering operation in TA (provides the initial vector)\n");
+	memset(iv, 0, sizeof(iv)); /* Load some dummy value */
+	set_iv(&ctx, iv, AES_TEST_KEY_SIZE);
+
+	printf("Decode buffer from TA\n");
+	memset(clear, 0x5a, sizeof(clear)); /* Load some dummy value */
+	cipher_buffer(&ctx, ciph, temp, AES_TEST_BUFFER_SIZE);
+
+	/* Check decoded is the clear content */
+	if (memcmp(clear, temp, AES_TEST_BUFFER_SIZE))
+		printf("Clear text and decoded text differ => ERROR\n");
+	else
+		printf("Clear text and decoded text match\n");
+
+	terminate_tee_session(&ctx);
+	return 0;
+}