fixup! WIP: generate and compute key using PSA API

Author: bettio

src/libAtomVM/otp_crypto.c

@@ -433,6 +433,31 @@ static term make_crypto_error(const char *file, int line, const char *message, C
     return make_crypto_error_tag(file, line, message, BADARG_ATOM, ctx);
 }
 
+static const char *avm_mbedtls_version_string_full(char *buf, size_t buf_size)
+{
+#if defined(MBEDTLS_VERSION_C)
+    /*
+     * Mbed TLS 2.x / 3.x: void mbedtls_version_get_string_full(char *string)
+     * Mbed TLS 4.x:       const char *mbedtls_version_get_string_full(void)
+     */
+#if defined(MBEDTLS_VERSION_MAJOR) && (MBEDTLS_VERSION_MAJOR >= 4)
+    UNUSED(buf);
+    UNUSED(buf_size);
+    return mbedtls_version_get_string_full();
+#else
+    if (buf_size < 18) {
+        return MBEDTLS_VERSION_STRING_FULL;
+    }
+    mbedtls_version_get_string_full(buf);
+    return buf;
+#endif
+#else
+    UNUSED(buf);
+    UNUSED(buf_size);
+    return MBEDTLS_VERSION_STRING_FULL;
+#endif
+}
+
 static term nif_crypto_crypto_one_time(Context *ctx, int argc, term argv[])
 {
     bool has_iv = argc == 5;
@@ -2954,13 +2979,9 @@ term nif_crypto_info_lib(Context *ctx, int argc, term argv[])
     const char *mbedtls_str = "mbedtls";
     size_t mbedtls_len = strlen("mbedtls");
 
-#ifdef MBEDTLS_VERSION_C
-    // 18 bytes including null byte according to mbedtls doc
-    char version_string[18];
-    mbedtls_version_get_string_full(version_string);
-#else
-    const char *version_string = MBEDTLS_VERSION_STRING_FULL;
-#endif
+    char version_string_buf[18];
+    const char *version_string =
+        avm_mbedtls_version_string_full(version_string_buf, sizeof(version_string_buf));
     size_t version_string_len = strlen(version_string);
 
     if (UNLIKELY(memory_ensure_free(ctx,