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luks: Create a very simple JSON library

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LUKS version 2 uses JSON as a means of communicating the key
information. Add a simple library which can print JSON in a
human-readable format.

Note that it does not fully parse the JSON fragment. That may be
considered later, if needed.

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2025-10-23 13:15:42 +01:00
parent 414baddf37
commit 2737bf15bf
7 changed files with 368 additions and 0 deletions
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1
test/lib/Makefile
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@@ -12,6 +12,7 @@ obj-$(CONFIG_EFI_LOADER) += efi_device_path.o
obj-$(CONFIG_EFI_SECURE_BOOT) += efi_image_region.o
obj-$(CONFIG_EFI_LOG) += efi_log.o
obj-y += hexdump.o
obj-$(CONFIG_JSON) += json.o
obj-$(CONFIG_SANDBOX) += kconfig.o
obj-y += lmb.o
obj-$(CONFIG_HAVE_SETJMP) += longjmp.o

211
test/lib/json.c Normal file
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@@ -0,0 +1,211 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Tests for JSON pretty-printer
*
* Copyright (C) 2025 Canonical Ltd
* Written by Simon Glass <simon.glass@canonical.com>
*/
#include <json.h>
#include <test/lib.h>
#include <test/test.h>
#include <test/ut.h>
static int lib_test_json_simple_object(struct unit_test_state *uts)
{
const char *json = "{\"name\":\"value\"}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"name\": \"value\"");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_simple_object, UTF_CONSOLE);
static int lib_test_json_simple_array(struct unit_test_state *uts)
{
const char *json = "[1,2,3]";
json_print_pretty(json, strlen(json));
ut_assert_nextline("[");
ut_assert_nextline(" 1,");
ut_assert_nextline(" 2,");
ut_assert_nextline(" 3");
ut_assert_nextline("]");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_simple_array, UTF_CONSOLE);
static int lib_test_json_nested_object(struct unit_test_state *uts)
{
const char *json = "{\"outer\":{\"inner\":\"value\"}}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"outer\": {");
ut_assert_nextline(" \"inner\": \"value\"");
ut_assert_nextline(" }");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_nested_object, UTF_CONSOLE);
static int lib_test_json_nested_array(struct unit_test_state *uts)
{
const char *json = "[[1,2],[3,4]]";
json_print_pretty(json, strlen(json));
ut_assert_nextline("[");
ut_assert_nextline(" [");
ut_assert_nextline(" 1,");
ut_assert_nextline(" 2");
ut_assert_nextline(" ],");
ut_assert_nextline(" [");
ut_assert_nextline(" 3,");
ut_assert_nextline(" 4");
ut_assert_nextline(" ]");
ut_assert_nextline("]");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_nested_array, UTF_CONSOLE);
static int lib_test_json_mixed_nested(struct unit_test_state *uts)
{
const char *json = "{\"array\":[1,{\"nested\":\"obj\"}]}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"array\": [");
ut_assert_nextline(" 1,");
ut_assert_nextline(" {");
ut_assert_nextline(" \"nested\": \"obj\"");
ut_assert_nextline(" }");
ut_assert_nextline(" ]");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_mixed_nested, UTF_CONSOLE);
static int lib_test_json_string_with_colon(struct unit_test_state *uts)
{
const char *json = "{\"url\":\"http://example.com\"}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"url\": \"http://example.com\"");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_string_with_colon, UTF_CONSOLE);
static int lib_test_json_string_with_comma(struct unit_test_state *uts)
{
const char *json = "{\"name\":\"last, first\"}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"name\": \"last, first\"");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_string_with_comma, UTF_CONSOLE);
static int lib_test_json_string_with_braces(struct unit_test_state *uts)
{
const char *json = "{\"text\":\"some {braces} here\"}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"text\": \"some {braces} here\"");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_string_with_braces, UTF_CONSOLE);
static int lib_test_json_escaped_quote(struct unit_test_state *uts)
{
const char *json = "{\"quote\":\"He said \\\"hello\\\"\"}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"quote\": \"He said \\\"hello\\\"\"");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_escaped_quote, UTF_CONSOLE);
static int lib_test_json_multiple_fields(struct unit_test_state *uts)
{
const char *json = "{\"name\":\"test\",\"age\":25,\"active\":true}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"name\": \"test\",");
ut_assert_nextline(" \"age\": 25,");
ut_assert_nextline(" \"active\": true");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_multiple_fields, UTF_CONSOLE);
static int lib_test_json_empty_object(struct unit_test_state *uts)
{
const char *json = "{}";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_empty_object, UTF_CONSOLE);
static int lib_test_json_empty_array(struct unit_test_state *uts)
{
const char *json = "[]";
json_print_pretty(json, strlen(json));
ut_assert_nextline("[");
ut_assert_nextline("]");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_empty_array, UTF_CONSOLE);
static int lib_test_json_whitespace(struct unit_test_state *uts)
{
const char *json = "{ \"name\" : \"value\" , \"num\" : 42 }";
json_print_pretty(json, strlen(json));
ut_assert_nextline("{");
ut_assert_nextline(" \"name\": \"value\",");
ut_assert_nextline(" \"num\": 42");
ut_assert_nextline("}");
ut_assert_console_end();
return 0;
}
LIB_TEST(lib_test_json_whitespace, UTF_CONSOLE);