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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295// SPDX-License-Identifier: GPL-2.0/* * base64_kunit_test.c - KUnit tests for base64 encoding and decoding functions * * Copyright (c) 2025, Guan-Chun Wu <409411716@gms.tku.edu.tw> */
#include <kunit/test.h>#include <linux/base64.h>
/* ---------- Benchmark helpers ---------- */static u64 bench_encode_ns(const u8 *data, int len, char *dst, int reps, enum base64_variant variant){ u64 t0, t1;
t0 = ktime_get_ns(); for (int i = 0; i < reps; i++) base64_encode(data, len, dst, true, variant); t1 = ktime_get_ns();
return div64_u64(t1 - t0, (u64)reps);}
static u64 bench_decode_ns(const char *data, int len, u8 *dst, int reps, enum base64_variant variant){ u64 t0, t1;
t0 = ktime_get_ns(); for (int i = 0; i < reps; i++) base64_decode(data, len, dst, true, variant); t1 = ktime_get_ns();
return div64_u64(t1 - t0, (u64)reps);}
static void run_perf_and_check(struct kunit *test, const char *label, int size, enum base64_variant variant){ const int reps = 1000; size_t outlen = DIV_ROUND_UP(size, 3) * 4; u8 *in = kmalloc(size, GFP_KERNEL); char *enc = kmalloc(outlen, GFP_KERNEL); u8 *decoded = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, in); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, enc); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, decoded);
get_random_bytes(in, size); int enc_len = base64_encode(in, size, enc, true, variant); int dec_len = base64_decode(enc, enc_len, decoded, true, variant);
/* correctness sanity check */ KUNIT_EXPECT_EQ(test, dec_len, size); KUNIT_EXPECT_MEMEQ(test, decoded, in, size);
/* benchmark encode */
u64 t1 = bench_encode_ns(in, size, enc, reps, variant);
kunit_info(test, "[%s] encode run : %lluns", label, t1);
u64 t2 = bench_decode_ns(enc, enc_len, decoded, reps, variant);
kunit_info(test, "[%s] decode run : %lluns", label, t2);
kfree(in); kfree(enc); kfree(decoded);}
static void base64_performance_tests(struct kunit *test){ /* run on STD variant only */ run_perf_and_check(test, "64B", 64, BASE64_STD); run_perf_and_check(test, "1KB", 1024, BASE64_STD);}
/* ---------- Helpers for encode ---------- */static void expect_encode_ok(struct kunit *test, const u8 *src, int srclen, const char *expected, bool padding, enum base64_variant variant){ char buf[128]; int encoded_len = base64_encode(src, srclen, buf, padding, variant);
buf[encoded_len] = '\0';
KUNIT_EXPECT_EQ(test, encoded_len, strlen(expected)); KUNIT_EXPECT_STREQ(test, buf, expected);}
/* ---------- Helpers for decode ---------- */static void expect_decode_ok(struct kunit *test, const char *src, const u8 *expected, int expected_len, bool padding, enum base64_variant variant){ u8 buf[128]; int decoded_len = base64_decode(src, strlen(src), buf, padding, variant);
KUNIT_EXPECT_EQ(test, decoded_len, expected_len); KUNIT_EXPECT_MEMEQ(test, buf, expected, expected_len);}
static void expect_decode_err(struct kunit *test, const char *src, int srclen, bool padding, enum base64_variant variant){ u8 buf[64]; int decoded_len = base64_decode(src, srclen, buf, padding, variant);
KUNIT_EXPECT_EQ(test, decoded_len, -1);}
/* ---------- Encode Tests ---------- */static void base64_std_encode_tests(struct kunit *test){ /* With padding */ expect_encode_ok(test, (const u8 *)"", 0, "", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"f", 1, "Zg==", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"fo", 2, "Zm8=", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"foo", 3, "Zm9v", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"foob", 4, "Zm9vYg==", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"fooba", 5, "Zm9vYmE=", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"foobar", 6, "Zm9vYmFy", true, BASE64_STD);
/* Extra cases with padding */ expect_encode_ok(test, (const u8 *)"Hello, world!", 13, "SGVsbG8sIHdvcmxkIQ==", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26, "QUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVo=", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"abcdefghijklmnopqrstuvwxyz", 26, "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo=", true, BASE64_STD); expect_encode_ok(test, (const u8 *)"0123456789+/", 12, "MDEyMzQ1Njc4OSsv", true, BASE64_STD);
/* Without padding */ expect_encode_ok(test, (const u8 *)"", 0, "", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"f", 1, "Zg", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"fo", 2, "Zm8", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"foo", 3, "Zm9v", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"foob", 4, "Zm9vYg", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"fooba", 5, "Zm9vYmE", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"foobar", 6, "Zm9vYmFy", false, BASE64_STD);
/* Extra cases without padding */ expect_encode_ok(test, (const u8 *)"Hello, world!", 13, "SGVsbG8sIHdvcmxkIQ", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26, "QUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVo", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"abcdefghijklmnopqrstuvwxyz", 26, "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo", false, BASE64_STD); expect_encode_ok(test, (const u8 *)"0123456789+/", 12, "MDEyMzQ1Njc4OSsv", false, BASE64_STD);}
/* ---------- Decode Tests ---------- */static void base64_std_decode_tests(struct kunit *test){ /* -------- With padding --------*/ expect_decode_ok(test, "", (const u8 *)"", 0, true, BASE64_STD); expect_decode_ok(test, "Zg==", (const u8 *)"f", 1, true, BASE64_STD); expect_decode_ok(test, "Zm8=", (const u8 *)"fo", 2, true, BASE64_STD); expect_decode_ok(test, "Zm9v", (const u8 *)"foo", 3, true, BASE64_STD); expect_decode_ok(test, "Zm9vYg==", (const u8 *)"foob", 4, true, BASE64_STD); expect_decode_ok(test, "Zm9vYmE=", (const u8 *)"fooba", 5, true, BASE64_STD); expect_decode_ok(test, "Zm9vYmFy", (const u8 *)"foobar", 6, true, BASE64_STD); expect_decode_ok(test, "SGVsbG8sIHdvcmxkIQ==", (const u8 *)"Hello, world!", 13, true, BASE64_STD); expect_decode_ok(test, "QUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVo=", (const u8 *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26, true, BASE64_STD); expect_decode_ok(test, "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo=", (const u8 *)"abcdefghijklmnopqrstuvwxyz", 26, true, BASE64_STD);
/* Error cases */ expect_decode_err(test, "Zg=!", 4, true, BASE64_STD); expect_decode_err(test, "Zm$=", 4, true, BASE64_STD); expect_decode_err(test, "Z===", 4, true, BASE64_STD); expect_decode_err(test, "Zg", 2, true, BASE64_STD); expect_decode_err(test, "Zm9v====", 8, true, BASE64_STD); expect_decode_err(test, "Zm==A", 5, true, BASE64_STD);
{ char with_nul[4] = { 'Z', 'g', '\0', '=' };
expect_decode_err(test, with_nul, 4, true, BASE64_STD); }
/* -------- Without padding --------*/ expect_decode_ok(test, "", (const u8 *)"", 0, false, BASE64_STD); expect_decode_ok(test, "Zg", (const u8 *)"f", 1, false, BASE64_STD); expect_decode_ok(test, "Zm8", (const u8 *)"fo", 2, false, BASE64_STD); expect_decode_ok(test, "Zm9v", (const u8 *)"foo", 3, false, BASE64_STD); expect_decode_ok(test, "Zm9vYg", (const u8 *)"foob", 4, false, BASE64_STD); expect_decode_ok(test, "Zm9vYmE", (const u8 *)"fooba", 5, false, BASE64_STD); expect_decode_ok(test, "Zm9vYmFy", (const u8 *)"foobar", 6, false, BASE64_STD); expect_decode_ok(test, "TWFu", (const u8 *)"Man", 3, false, BASE64_STD); expect_decode_ok(test, "SGVsbG8sIHdvcmxkIQ", (const u8 *)"Hello, world!", 13, false, BASE64_STD); expect_decode_ok(test, "QUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVo", (const u8 *)"ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26, false, BASE64_STD); expect_decode_ok(test, "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo", (const u8 *)"abcdefghijklmnopqrstuvwxyz", 26, false, BASE64_STD); expect_decode_ok(test, "MDEyMzQ1Njc4OSsv", (const u8 *)"0123456789+/", 12, false, BASE64_STD);
/* Error cases */ expect_decode_err(test, "Zg=!", 4, false, BASE64_STD); expect_decode_err(test, "Zm$=", 4, false, BASE64_STD); expect_decode_err(test, "Z===", 4, false, BASE64_STD); expect_decode_err(test, "Zg=", 3, false, BASE64_STD); expect_decode_err(test, "Zm9v====", 8, false, BASE64_STD); expect_decode_err(test, "Zm==v", 4, false, BASE64_STD);
{ char with_nul[4] = { 'Z', 'g', '\0', '=' };
expect_decode_err(test, with_nul, 4, false, BASE64_STD); }}
/* ---------- Variant tests (URLSAFE / IMAP) ---------- */static void base64_variant_tests(struct kunit *test){ const u8 sample1[] = { 0x00, 0xfb, 0xff, 0x7f, 0x80 }; char std_buf[128], url_buf[128], imap_buf[128]; u8 back[128]; int n_std, n_url, n_imap, m; int i;
n_std = base64_encode(sample1, sizeof(sample1), std_buf, false, BASE64_STD); n_url = base64_encode(sample1, sizeof(sample1), url_buf, false, BASE64_URLSAFE); std_buf[n_std] = '\0'; url_buf[n_url] = '\0';
for (i = 0; i < n_std; i++) { if (std_buf[i] == '+') std_buf[i] = '-'; else if (std_buf[i] == '/') std_buf[i] = '_'; } KUNIT_EXPECT_STREQ(test, std_buf, url_buf);
m = base64_decode(url_buf, n_url, back, false, BASE64_URLSAFE); KUNIT_EXPECT_EQ(test, m, (int)sizeof(sample1)); KUNIT_EXPECT_MEMEQ(test, back, sample1, sizeof(sample1));
n_std = base64_encode(sample1, sizeof(sample1), std_buf, false, BASE64_STD); n_imap = base64_encode(sample1, sizeof(sample1), imap_buf, false, BASE64_IMAP); std_buf[n_std] = '\0'; imap_buf[n_imap] = '\0';
for (i = 0; i < n_std; i++) if (std_buf[i] == '/') std_buf[i] = ','; KUNIT_EXPECT_STREQ(test, std_buf, imap_buf);
m = base64_decode(imap_buf, n_imap, back, false, BASE64_IMAP); KUNIT_EXPECT_EQ(test, m, (int)sizeof(sample1)); KUNIT_EXPECT_MEMEQ(test, back, sample1, sizeof(sample1));
{ const char *bad = "Zg=="; u8 tmp[8];
m = base64_decode(bad, strlen(bad), tmp, false, BASE64_URLSAFE); KUNIT_EXPECT_EQ(test, m, -1);
m = base64_decode(bad, strlen(bad), tmp, false, BASE64_IMAP); KUNIT_EXPECT_EQ(test, m, -1); }}
/* ---------- Test registration ---------- */static struct kunit_case base64_test_cases[] = { KUNIT_CASE(base64_performance_tests), KUNIT_CASE(base64_std_encode_tests), KUNIT_CASE(base64_std_decode_tests), KUNIT_CASE(base64_variant_tests), {}};
static struct kunit_suite base64_test_suite = { .name = "base64", .test_cases = base64_test_cases,};
kunit_test_suite(base64_test_suite);
MODULE_AUTHOR("Guan-Chun Wu <409411716@gms.tku.edu.tw>");MODULE_DESCRIPTION("KUnit tests for Base64 encoding/decoding, including performance checks");MODULE_LICENSE("GPL");