Factorize nifs for OTP crypto module

Move implementation from ESP32 to otp_crypto.c and make it available to all
platforms using mbedtls.

Alter Pico's mbedtls configuration to handle the ciphers we support

Also fix crypto implementation to accept iv for ciphers that do not require one,
following OTP's API.

Signed-off-by: Paul Guyot <pguyot@kallisys.net>

.github/workflows/build-and-test-other.yaml

@@ -148,7 +148,7 @@ jobs:
             ${{ matrix.install_deps }}
         else
             apt update &&
-            apt install -y file gcc g++ binutils cmake make doxygen gperf zlib1g-dev libssl-dev
+            apt install -y file gcc g++ binutils cmake make doxygen gperf zlib1g-dev libssl-dev libmbedtls-dev
         fi &&
         file /bin/bash &&
         uname -a &&

src/libAtomVM/otp_crypto.h

@@ -0,0 +1,36 @@
+/*
+ * This file is part of AtomVM.
+ *
+ * Copyright 2023 Paul Guyot <pguyot@kallisys.net>
+ *
+ * Licensed 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
+ */
+
+#ifndef _OTP_CRYPTO_H_
+#define _OTP_CRYPTO_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <nifs.h>
+
+const struct Nif *otp_crypto_nif_get_nif(const char *nifname);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/platforms/esp32/components/avm_builtins/CMakeLists.txt

@@ -28,6 +28,7 @@ set(AVM_BUILTIN_COMPONENT_SRCS
     "socket_driver.c"
     "spi_driver.c"
     "uart_driver.c"
+    "otp_crypto_platform.c"
     "otp_net_platform.c"
     "otp_socket_platform.c"
     "otp_ssl_platform.c"
@@ -39,7 +40,7 @@ else()
     set(ADDITIONAL_PRIV_REQUIRES "")
 endif()
 
-if(CONFIG_AVM_ENABLE_OTP_SSL_NIFS)
+if(CONFIG_AVM_ENABLE_OTP_SSL_NIFS OR CONFIG_AVM_ENABLE_OTP_CRYPTO_NIFS)
    set(ADDITIONAL_PRIV_REQUIRES ${ADDITIONAL_PRIV_REQUIRES} "mbedtls")
 endif()
 

src/platforms/esp32/components/avm_builtins/Kconfig

@@ -66,6 +66,10 @@ config AVM_ENABLE_UART_PORT_DRIVER
     bool "Enable UART port driver"
     default y
 
+config AVM_ENABLE_OTP_CRYPTO_NIFS
+    bool "Enable OTP Crypto NIFs"
+    default y
+
 config AVM_ENABLE_OTP_SOCKET_NIFS
     bool "Enable OTP Socket NIFs"
     default y

src/platforms/esp32/components/avm_builtins/otp_crypto_platform.c

@@ -0,0 +1,30 @@
+/*
+ * This file is part of AtomVM.
+ *
+ * Copyright 2023 by Paul Guyot <pguyot@kallisys.net>
+ *
+ * Licensed 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
+ */
+
+#include <esp32_sys.h>
+#include <nifs.h>
+#include <otp_crypto.h>
+#include <sdkconfig.h>
+
+#ifdef CONFIG_AVM_ENABLE_OTP_CRYPTO_NIFS
+
+REGISTER_NIF_COLLECTION(otp_crypto, NULL, NULL, otp_crypto_nif_get_nif)
+
+#endif

src/platforms/esp32/components/avm_sys/CMakeLists.txt

@@ -26,6 +26,7 @@ set(AVM_SYS_COMPONENT_SRCS
     "platform_nifs.c"
     "platform_defaultatoms.c"
     "../../../../libAtomVM/inet.c"
+    "../../../../libAtomVM/otp_crypto.c"
     "../../../../libAtomVM/otp_net.c"
     "../../../../libAtomVM/otp_socket.c"
     "../../../../libAtomVM/otp_ssl.c"