[crypto] PSA API: remove otPlatCryptoInit API

This commit removes otPlatCryptoInit API and moves responsibility of
initializing the Crypto subsystem to the platform.

Signed-off-by: Łukasz Duda <lukasz.duda@nordicsemi.no>

examples/platforms/simulation/system.c

@@ -55,6 +55,10 @@
 #include <openthread/platform/radio.h>
 #include <openthread/platform/toolchain.h>
 
+#if (OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_PSA)
+#include <psa/crypto.h>
+#endif
+
 #include "simul_utils.h"
 
 uint32_t gNodeId = 1;
@@ -201,10 +205,13 @@ void otSysInit(int aArgCount, char *aArgVector[])
     signal(SIGTERM, &handleSignal);
     signal(SIGHUP, &handleSignal);
 
-#if OPENTHREAD_PSA_CRYPTO_NATIVE_ITS_FILE && (OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_PSA)
+#if (OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_PSA)
+    psa_crypto_init();
+#if OPENTHREAD_PSA_CRYPTO_NATIVE_ITS_FILE
     snprintf(sNativeItsFileNamePrefix, sizeof(sNativeItsFileNamePrefix), "%s/%s_%d_",
              OPENTHREAD_CONFIG_POSIX_SETTINGS_PATH, getenv("PORT_OFFSET") ? getenv("PORT_OFFSET") : "0", gNodeId);
     gItsFileNamePrefix = sNativeItsFileNamePrefix;
+#endif
 #endif
 
     platformLoggingInit(basename(aArgVector[0]));

examples/platforms/simulation/virtual_time/platform-sim.c

@@ -51,6 +51,9 @@
 #include <openthread/platform/alarm-milli.h>
 
 #include "../simul_utils.h"
+#if (OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_PSA)
+#include <psa/crypto.h>
+#endif
 #include "lib/platform/exit_code.h"
 #include "utils/uart.h"
 
@@ -278,10 +281,13 @@ void otSysInit(int argc, char *argv[])
         DieNow(OT_EXIT_FAILURE);
     }
 
-#if OPENTHREAD_PSA_CRYPTO_NATIVE_ITS_FILE && (OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_PSA)
+#if (OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_PSA)
+    psa_crypto_init();
+#if OPENTHREAD_PSA_CRYPTO_NATIVE_ITS_FILE
     snprintf(sNativeItsFileNamePrefix, sizeof(sNativeItsFileNamePrefix), "%s/%s_%d_",
              OPENTHREAD_CONFIG_POSIX_SETTINGS_PATH, getenv("PORT_OFFSET") ? getenv("PORT_OFFSET") : "0", gNodeId);
     gItsFileNamePrefix = sNativeItsFileNamePrefix;
+#endif
 #endif
 
     socket_init();

include/openthread/platform/crypto.h

@@ -215,11 +215,6 @@ typedef struct otPlatCryptoEcdsaSignature otPlatCryptoEcdsaSignature;
  */
 #define OT_CRYPTO_PBDKF2_MAX_SALT_SIZE 30
 
-/**
- * Initialize the Crypto module.
- */
-void otPlatCryptoInit(void);
-
 /**
  * Import a key into PSA ITS.
  *

src/core/crypto/crypto_platform_mbedtls.cpp

@@ -78,11 +78,6 @@ static constexpr uint16_t kEntropyMinThreshold = 16;
 #endif
 #endif
 
-OT_TOOL_WEAK void otPlatCryptoInit(void)
-{
-    // Intentionally empty.
-}
-
 // AES  Implementation
 OT_TOOL_WEAK otError otPlatCryptoAesInit(otCryptoContext *aContext)
 {

src/core/crypto/crypto_platform_psa.cpp

@@ -200,8 +200,6 @@ exit:
     return error;
 }
 
-OT_TOOL_WEAK void otPlatCryptoInit(void) { psa_crypto_init(); }
-
 OT_TOOL_WEAK otError otPlatCryptoImportKey(otCryptoKeyRef      *aKeyRef,
                                            otCryptoKeyType      aKeyType,
                                            otCryptoKeyAlgorithm aKeyAlgorithm,

src/core/thread/key_manager.cpp

@@ -176,8 +176,6 @@ KeyManager::KeyManager(Instance &aInstance)
     , mKekFrameCounter(0)
     , mIsPskcSet(false)
 {
-    otPlatCryptoInit();
-
 #if OPENTHREAD_CONFIG_PLATFORM_KEY_REFERENCES_ENABLE
     {
         NetworkKey networkKey;