mbedtls-alt/poly1305-alt: add poly1305 alternative implementation

Signed-off-by: makejian <[email protected]>

Author: ThePassionate

crypto/mbedtls/Kconfig

@@ -578,6 +578,11 @@ config MBEDTLS_MD5_ALT
 	select MBEDTLS_ALT
 	default n
 
+config MBEDTLS_POLY1305_ALT
+	bool "Enable Mbedt TLS POLY1305 module alted by nuttx crypto"
+	select MBEDTLS_ALT
+	default n
+
 config MBEDTLS_RIPEMD160_ALT
 	bool "Enable Mbedt TLS RIPEMD160 module alted by nuttx crypto"
 	select MBEDTLS_ALT

crypto/mbedtls/Makefile

@@ -127,6 +127,10 @@ ifeq ($(CONFIG_MBEDTLS_MD5_ALT),y)
 CSRCS += $(APPDIR)/crypto/mbedtls/source/md5_alt.c
 endif
 
+ifeq ($(CONFIG_MBEDTLS_POLY1305_ALT),y)
+CSRCS += $(APPDIR)/crypto/mbedtls/source/poly1305_alt.c
+endif
+
 ifeq ($(CONFIG_MBEDTLS_RIPEMD160_ALT),y)
 CSRCS += $(APPDIR)/crypto/mbedtls/source/ripemd160_alt.c
 endif

crypto/mbedtls/include/mbedtls/mbedtls_config.h

@@ -374,8 +374,9 @@
 #ifdef CONFIG_MBEDTLS_MD5_ALT
 #define MBEDTLS_MD5_ALT
 #endif
-/* #define MBEDTLS_POLY1305_ALT
- */
+#ifdef CONFIG_MBEDTLS_POLY1305_ALT
+#define MBEDTLS_POLY1305_ALT
+#endif
 #ifdef CONFIG_MBEDTLS_RIPEMD160_ALT
 #define MBEDTLS_RIPEMD160_ALT
 #endif

crypto/mbedtls/include/poly1305_alt.h

@@ -0,0 +1,31 @@
+/****************************************************************************
+ * apps/crypto/mbedtls/include/poly1305_alt.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ ****************************************************************************/
+
+#ifndef __APPS_CRYPTO_MBEDTLS_INCLUDE_POLY1305_ALT_H
+#define __APPS_CRYPTO_MBEDTLS_INCLUDE_POLY1305_ALT_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include "dev_alt.h"
+
+#define mbedtls_poly1305_context cryptodev_context_t
+
+#endif /* __APPS_CRYPTO_MBEDTLS_INCLUDE_POLY1305_ALT_H */

crypto/mbedtls/source/poly1305_alt.c

@@ -0,0 +1,101 @@
+/****************************************************************************
+ * apps/crypto/mbedtls/source/poly1305_alt.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include "mbedtls/error.h"
+#include "mbedtls/poly1305.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void mbedtls_poly1305_init(FAR mbedtls_poly1305_context *ctx)
+{
+  cryptodev_init(ctx);
+}
+
+void mbedtls_poly1305_free(FAR mbedtls_poly1305_context *ctx)
+{
+  cryptodev_free(ctx);
+}
+
+int mbedtls_poly1305_starts(mbedtls_poly1305_context *ctx,
+                            const unsigned char key[32])
+{
+  ctx->session.mac = CRYPTO_POLY1305;
+  ctx->session.mackey = (caddr_t)key;
+  ctx->session.mackeylen = 32;
+  return cryptodev_get_session(ctx);
+}
+
+int mbedtls_poly1305_update(FAR mbedtls_poly1305_context *ctx,
+                            FAR const unsigned char *input,
+                            size_t ilen)
+{
+  ctx->crypt.op = COP_ENCRYPT;
+  ctx->crypt.flags |= COP_FLAG_UPDATE;
+  ctx->crypt.src = (caddr_t)input;
+  ctx->crypt.len = ilen;
+  return cryptodev_crypt(ctx);
+}
+
+int mbedtls_poly1305_finish(FAR mbedtls_poly1305_context *ctx,
+                            unsigned char mac[16])
+{
+  int ret;
+
+  ctx->crypt.op = COP_ENCRYPT;
+  ctx->crypt.flags = 0;
+  ctx->crypt.mac = (caddr_t)mac;
+  ret = cryptodev_crypt(ctx);
+  cryptodev_free_session(ctx);
+  return ret;
+}
+
+int mbedtls_poly1305_mac(const unsigned char key[32],
+                         FAR const unsigned char *input,
+                         size_t ilen,
+                         unsigned char mac[16])
+{
+  mbedtls_poly1305_context ctx;
+  int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+  mbedtls_poly1305_init(&ctx);
+
+  ret = mbedtls_poly1305_starts(&ctx, key);
+  if (ret != 0)
+    {
+      goto cleanup;
+    }
+
+  ret = mbedtls_poly1305_update(&ctx, input, ilen);
+  if (ret != 0)
+    {
+      goto cleanup;
+    }
+
+  ret = mbedtls_poly1305_finish(&ctx, mac);
+
+cleanup:
+  mbedtls_poly1305_free(&ctx);
+  return ret;
+}