mbedtls: add the python script used to generate PSA Kconfigs

Since PSA has several different symbols defined and since it's
better to keep them aligned with the current MbedTLS release,
a python script is used to generate both:
- Kconfig.psa
- config-psa-generic.h

Signed-off-by: Valerio Setti <vsetti@baylibre.com>

modules/mbedtls/create_psa_files.py

@@ -0,0 +1,128 @@
+#!/bin/python3
+
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+import re
+import os
+import sys
+import argparse
+from typing import List
+
+SCRIPT_PATH = os.path.dirname(__file__)
+INPUT_REL_PATH = os.path.join("..", "..", "..", "modules", "crypto", "mbedtls",
+                              "include", "psa", "crypto_config.h")
+INPUT_FILE = os.path.normpath(os.path.join(SCRIPT_PATH, INPUT_REL_PATH))
+
+KCONFIG_PATH=os.path.join(SCRIPT_PATH, "Kconfig.psa")
+HEADER_PATH=os.path.join(SCRIPT_PATH, "configs", "config-psa.h")
+
+KCONFIG_HEADER="""\
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+# This file was automatically generated by {}
+# from: {}.
+# Do not edit it manually.
+
+config MBEDTLS_PSA_CRYPTO_CLIENT
+	bool
+	default y
+	depends on BUILD_WITH_TFM || MBEDTLS_PSA_CRYPTO_C
+
+if MBEDTLS_PSA_CRYPTO_CLIENT
+
+config PSA_CRYPTO_ENABLE_ALL
+	bool "All PSA crypto features"
+""".format(os.path.basename(__file__), INPUT_REL_PATH)
+
+KCONFIG_FOOTER="\nendif # MBEDTLS_PSA_CRYPTO_CLIENT\n"
+
+H_HEADER="""\
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* This file was automatically generated by {}
+ * from: {}
+ * Do not edit it manually.
+ */
+
+#ifndef CONFIG_PSA_H
+#define CONFIG_PSA_H
+""".format(os.path.basename(__file__), INPUT_REL_PATH)
+
+H_FOOTER="\n#endif /* CONFIG_PSA_H */\n"
+
+def parse_psa_symbols(input_file: str):
+    symbols = []
+    with open(input_file) as file:
+        content = file.readlines()
+        for line in content:
+            res = re.findall(r"^#define *(PSA_WANT_\w+)", line)
+            if len(res) > 0:
+                symbols.append(res[0])
+    return symbols
+
+def generate_kconfig_content(symbols: List[str]) -> str:
+    output = []
+    for sym in symbols:
+        output.append("""
+config {0}
+\tbool "{0}" if !MBEDTLS_PROMPTLESS
+\tdefault y if PSA_CRYPTO_ENABLE_ALL
+""".format(sym))
+
+    return KCONFIG_HEADER + "".join(output) + KCONFIG_FOOTER
+
+def generate_header_content(symbols: List[str]) -> str:
+    output = []
+    for sym in symbols:
+        output.append("""
+#if defined(CONFIG_{0})
+#define {0}   1
+#endif
+""".format(sym))
+
+    return H_HEADER + "".join(output) + H_FOOTER
+
+def generate_output_file(content: str, file_name: str):
+    with open(file_name, "wt") as output_file:
+        output_file.write(content)
+
+def check_file(content: str, file_name: str):
+    file_content = ""
+    with open(file_name) as input_file:
+        file_content = input_file.read()
+        if file_content != content:
+            print()
+            return False
+    return True
+
+def main():
+    arg_parser = argparse.ArgumentParser(allow_abbrev = False)
+    arg_parser.add_argument("--check", action = "store_true", default = False)
+    args = arg_parser.parse_args()
+
+    check_files = args.check
+
+    psa_symbols = parse_psa_symbols(INPUT_FILE)
+    kconfig_content = generate_kconfig_content(psa_symbols)
+    header_content = generate_header_content(psa_symbols)
+
+    if check_files:
+        if ((not check_file(kconfig_content, KCONFIG_PATH)) or
+            (not check_file(header_content, HEADER_PATH))):
+            print("Error: PSA Kconfig and header files do not match with the current"
+                  "version of MbedTLS. Please update them.")
+            sys.exit(1)
+    else:
+        generate_output_file(kconfig_content, KCONFIG_PATH)
+        generate_output_file(header_content, HEADER_PATH)
+
+    sys.exit(0)
+
+if __name__ == "__main__":
+    main()