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-rw-r--r--lib/crypto/.kunitconfig1
-rw-r--r--lib/crypto/tests/Kconfig9
-rw-r--r--lib/crypto/tests/Makefile1
-rw-r--r--lib/crypto/tests/aes_ccm_kunit.c356
4 files changed, 367 insertions, 0 deletions
diff --git a/lib/crypto/.kunitconfig b/lib/crypto/.kunitconfig
index 3efc854a2c08..f0237e602f28 100644
--- a/lib/crypto/.kunitconfig
+++ b/lib/crypto/.kunitconfig
@@ -3,6 +3,7 @@ CONFIG_KUNIT=y
CONFIG_CRYPTO_LIB_ENABLE_ALL_FOR_KUNIT=y
CONFIG_CRYPTO_LIB_AES_CBC_MACS_KUNIT_TEST=y
+CONFIG_CRYPTO_LIB_AES_CCM_KUNIT_TEST=y
CONFIG_CRYPTO_LIB_BLAKE2B_KUNIT_TEST=y
CONFIG_CRYPTO_LIB_BLAKE2S_KUNIT_TEST=y
CONFIG_CRYPTO_LIB_CHACHA20POLY1305_KUNIT_TEST=y
diff --git a/lib/crypto/tests/Kconfig b/lib/crypto/tests/Kconfig
index bc084dde424f..320236e996b1 100644
--- a/lib/crypto/tests/Kconfig
+++ b/lib/crypto/tests/Kconfig
@@ -9,6 +9,15 @@ config CRYPTO_LIB_AES_CBC_MACS_KUNIT_TEST
KUnit tests for the AES-CMAC, AES-XCBC-MAC, and AES-CBC-MAC message
authentication codes.
+config CRYPTO_LIB_AES_CCM_KUNIT_TEST
+ tristate "KUnit tests for AES-CCM" if !KUNIT_ALL_TESTS
+ depends on KUNIT && CRYPTO_LIB_AES_CCM
+ default KUNIT_ALL_TESTS
+ select CRYPTO_LIB_BENCHMARK_VISIBLE
+ # This test uses BLAKE2s, but that's always built-in.
+ help
+ KUnit tests for the AES-CCM authenticated encryption algorithm.
+
config CRYPTO_LIB_BLAKE2B_KUNIT_TEST
tristate "KUnit tests for BLAKE2b" if !KUNIT_ALL_TESTS
depends on KUNIT && CRYPTO_LIB_BLAKE2B
diff --git a/lib/crypto/tests/Makefile b/lib/crypto/tests/Makefile
index a739413500b6..085852ba008b 100644
--- a/lib/crypto/tests/Makefile
+++ b/lib/crypto/tests/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-or-later
obj-$(CONFIG_CRYPTO_LIB_AES_CBC_MACS_KUNIT_TEST) += aes_cbc_macs_kunit.o
+obj-$(CONFIG_CRYPTO_LIB_AES_CCM_KUNIT_TEST) += aes_ccm_kunit.o
obj-$(CONFIG_CRYPTO_LIB_BLAKE2B_KUNIT_TEST) += blake2b_kunit.o
obj-$(CONFIG_CRYPTO_LIB_BLAKE2S_KUNIT_TEST) += blake2s_kunit.o
obj-$(CONFIG_CRYPTO_LIB_CHACHA20POLY1305_KUNIT_TEST) += chacha20poly1305_kunit.o
diff --git a/lib/crypto/tests/aes_ccm_kunit.c b/lib/crypto/tests/aes_ccm_kunit.c
new file mode 100644
index 000000000000..e8f2b3446017
--- /dev/null
+++ b/lib/crypto/tests/aes_ccm_kunit.c
@@ -0,0 +1,356 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * KUnit test suite for AES-CCM
+ *
+ * Copyright 2026 Google LLC
+ */
+#include <crypto/aes-ccm.h>
+#include <crypto/blake2s.h>
+#include "test-utils.h"
+
+/* AES-CCM test vectors from external sources */
+static const struct aes_ccm_testvec {
+ const char *name;
+ const char *key;
+ size_t key_len;
+ const char *nonce;
+ size_t nonce_len;
+ const char *ad;
+ size_t ad_len;
+ const char *ptext;
+ const char *ctext;
+ size_t data_len;
+ const char *tag;
+ size_t tag_len;
+} aes_ccm_testvecs[] = {
+ {
+ .name = "RFC 3610 Packet Vector #1",
+ .key = "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7"
+ "\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf",
+ .key_len = 16,
+ .nonce = "\x00\x00\x00\x03\x02\x01\x00\xa0"
+ "\xa1\xa2\xa3\xa4\xa5",
+ .nonce_len = 13,
+ .ad = "\x00\x01\x02\x03\x04\x05\x06\x07",
+ .ad_len = 8,
+ .ptext = "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+ "\x10\x11\x12\x13\x14\x15\x16\x17"
+ "\x18\x19\x1a\x1b\x1c\x1d\x1e",
+ .ctext = "\x58\x8c\x97\x9a\x61\xc6\x63\xd2"
+ "\xf0\x66\xd0\xc2\xc0\xf9\x89\x80"
+ "\x6d\x5f\x6b\x61\xda\xc3\x84",
+ .data_len = 23,
+ .tag = "\x17\xe8\xd1\x2c\xfd\xf9\x26\xe0",
+ .tag_len = 8,
+ },
+ {
+ .name = "RFC 3610 Packet Vector #5",
+ .key = "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7"
+ "\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf",
+ .key_len = 16,
+ .nonce = "\x00\x00\x00\x07\x06\x05\x04\xa0"
+ "\xa1\xa2\xa3\xa4\xa5",
+ .nonce_len = 13,
+ .ad = "\x00\x01\x02\x03\x04\x05\x06\x07"
+ "\x08\x09\x0a\x0b",
+ .ad_len = 12,
+ .ptext = "\x0c\x0d\x0e\x0f\x10\x11\x12\x13"
+ "\x14\x15\x16\x17\x18\x19\x1a\x1b"
+ "\x1c\x1d\x1e\x1f",
+ .ctext = "\xdc\xf1\xfb\x7b\x5d\x9e\x23\xfb"
+ "\x9d\x4e\x13\x12\x53\x65\x8a\xd8"
+ "\x6e\xbd\xca\x3e",
+ .data_len = 20,
+ .tag = "\x51\xe8\x3f\x07\x7d\x9c\x2d\x93",
+ .tag_len = 8,
+ },
+ {
+ .name = "RFC 3610 Packet Vector #9",
+ .key = "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7"
+ "\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf",
+ .key_len = 16,
+ .nonce = "\x00\x00\x00\x0b\x0a\x09\x08\xa0"
+ "\xa1\xa2\xa3\xa4\xa5",
+ .nonce_len = 13,
+ .ad = "\x00\x01\x02\x03\x04\x05\x06\x07",
+ .ad_len = 8,
+ .ptext = "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+ "\x10\x11\x12\x13\x14\x15\x16\x17"
+ "\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"
+ "\x20",
+ .ctext = "\x82\x53\x1a\x60\xcc\x24\x94\x5a"
+ "\x4b\x82\x79\x18\x1a\xb5\xc8\x4d"
+ "\xf2\x1c\xe7\xf9\xb7\x3f\x42\xe1"
+ "\x97",
+ .data_len = 25,
+ .tag = "\xea\x9c\x07\xe5\x6b\x5e\xb1\x7e"
+ "\x5f\x4e",
+ .tag_len = 10,
+ },
+ {
+ .name = "NIST SP 800-38C Example 1",
+ .key = "\x40\x41\x42\x43\x44\x45\x46\x47"
+ "\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f",
+ .key_len = 16,
+ .nonce = "\x10\x11\x12\x13\x14\x15\x16",
+ .nonce_len = 7,
+ .ad = "\x00\x01\x02\x03\x04\x05\x06\x07",
+ .ad_len = 8,
+ .ptext = "\x20\x21\x22\x23",
+ .ctext = "\x71\x62\x01\x5b",
+ .data_len = 4,
+ .tag = "\x4d\xac\x25\x5d",
+ .tag_len = 4,
+ },
+ {
+ .name = "NIST SP 800-38C Example 2",
+ .key = "\x40\x41\x42\x43\x44\x45\x46\x47"
+ "\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f",
+ .key_len = 16,
+ .nonce = "\x10\x11\x12\x13\x14\x15\x16\x17",
+ .nonce_len = 8,
+ .ad = "\x00\x01\x02\x03\x04\x05\x06\x07"
+ "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+ .ad_len = 16,
+ .ptext = "\x20\x21\x22\x23\x24\x25\x26\x27"
+ "\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f",
+ .ctext = "\xd2\xa1\xf0\xe0\x51\xea\x5f\x62"
+ "\x08\x1a\x77\x92\x07\x3d\x59\x3d",
+ .data_len = 16,
+ .tag = "\x1f\xc6\x4f\xbf\xac\xcd",
+ .tag_len = 6,
+ },
+ {
+ .name = "NIST SP 800-38C Example 3",
+ .key = "\x40\x41\x42\x43\x44\x45\x46\x47"
+ "\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f",
+ .key_len = 16,
+ .nonce = "\x10\x11\x12\x13\x14\x15\x16\x17"
+ "\x18\x19\x1a\x1b",
+ .nonce_len = 12,
+ .ad = "\x00\x01\x02\x03\x04\x05\x06\x07"
+ "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+ "\x10\x11\x12\x13",
+ .ad_len = 20,
+ .ptext = "\x20\x21\x22\x23\x24\x25\x26\x27"
+ "\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f"
+ "\x30\x31\x32\x33\x34\x35\x36\x37",
+ .ctext = "\xe3\xb2\x01\xa9\xf5\xb7\x1a\x7a"
+ "\x9b\x1c\xea\xec\xcd\x97\xe7\x0b"
+ "\x61\x76\xaa\xd9\xa4\x42\x8a\xa5",
+ .data_len = 24,
+ .tag = "\x48\x43\x92\xfb\xc1\xb0\x99\x51",
+ .tag_len = 8,
+ },
+};
+
+static void test_aes_ccm_one_test_vector(struct kunit *test,
+ const struct aes_ccm_testvec *tv)
+{
+ u8 *ctext = alloc_buf(test, tv->data_len);
+ u8 *decrypted = alloc_buf(test, tv->data_len);
+ u8 *tag = alloc_buf(test, tv->tag_len);
+ struct aes_ccm_key key;
+ int err;
+
+ err = aes_ccm_preparekey(&key, tv->key, tv->key_len, tv->tag_len);
+ KUNIT_ASSERT_EQ_MSG(test, 0, err, "Failed to prepare key for %s",
+ tv->name);
+
+ err = aes_ccm_encrypt(ctext, tv->ptext, tv->data_len, tag, tv->ad,
+ tv->ad_len, tv->nonce, tv->nonce_len, &key);
+ KUNIT_ASSERT_EQ_MSG(test, 0, err, "Encryption failed for %s", tv->name);
+ KUNIT_ASSERT_MEMEQ_MSG(test, tv->ctext, ctext, tv->data_len,
+ "Wrong ciphertext for %s", tv->name);
+ KUNIT_ASSERT_MEMEQ_MSG(test, tag, tv->tag, tv->tag_len,
+ "Wrong tag for %s", tv->name);
+
+ err = aes_ccm_decrypt(decrypted, ctext, tv->data_len, tag, tv->ad,
+ tv->ad_len, tv->nonce, tv->nonce_len, &key);
+ KUNIT_ASSERT_EQ_MSG(test, 0, err, "Decryption failed for %s", tv->name);
+ KUNIT_ASSERT_MEMEQ_MSG(test, tv->ptext, decrypted, tv->data_len,
+ "Wrong plaintext for %s", tv->name);
+}
+
+static void test_aes_ccm_test_vectors(struct kunit *test)
+{
+ for (size_t i = 0; i < ARRAY_SIZE(aes_ccm_testvecs); i++)
+ test_aes_ccm_one_test_vector(test, &aes_ccm_testvecs[i]);
+}
+
+/*
+ * Test NIST SP 800-38C Example 4, which uses a deterministically-generated
+ * 65536-byte associated data string.
+ */
+static void test_aes_ccm_nist_sp800_38c_example4(struct kunit *test)
+{
+ struct aes_ccm_testvec tv = {
+ .name = "NIST SP 800-38C Example 4",
+ .key_len = 16,
+ .nonce_len = 13,
+ .ad_len = 65536,
+ .ctext = "\x69\x91\x5d\xad\x1e\x84\xc6\x37"
+ "\x6a\x68\xc2\x96\x7e\x4d\xab\x61"
+ "\x5a\xe0\xfd\x1f\xae\xc4\x4c\xc4"
+ "\x84\x82\x85\x29\x46\x3c\xcf\x72",
+ .data_len = 32,
+ .tag = "\xb4\xac\x6b\xec\x93\xe8\x59\x8e"
+ "\x7f\x0d\xad\xbc\xea\x5b",
+ .tag_len = 14,
+ };
+ u8 *key, *nonce, *ad, *ptext;
+
+ key = alloc_buf(test, tv.key_len);
+ for (size_t i = 0; i < tv.key_len; i++)
+ key[i] = 0x40 + i;
+
+ nonce = alloc_guarded_buf(test, tv.nonce_len);
+ for (size_t i = 0; i < tv.nonce_len; i++)
+ nonce[i] = 0x10 + i;
+
+ ad = alloc_guarded_buf(test, tv.ad_len);
+ for (size_t i = 0; i < tv.ad_len; i++)
+ ad[i] = (u8)i;
+
+ ptext = alloc_guarded_buf(test, tv.data_len);
+ for (size_t i = 0; i < tv.data_len; i++)
+ ptext[i] = 0x20 + i;
+
+ tv.key = key;
+ tv.nonce = nonce;
+ tv.ad = ad;
+ tv.ptext = ptext;
+
+ test_aes_ccm_one_test_vector(test, &tv);
+}
+
+static const size_t aes_ccm_valid_key_lens[] = { 16, 24, 32 };
+#define AEAD_MAX_KEY_LEN 32
+#define AEAD_VALID_KEY_LENS aes_ccm_valid_key_lens
+
+static const size_t aes_ccm_valid_nonce_lens[] = { 7, 8, 9, 10, 11, 12, 13 };
+#define AEAD_MAX_NONCE_LEN 13
+#define AEAD_VALID_NONCE_LENS aes_ccm_valid_nonce_lens
+
+static const size_t aes_ccm_valid_tag_lens[] = { 4, 6, 8, 10, 12, 14, 16 };
+#define AEAD_MAX_TAG_LEN 16
+#define AEAD_VALID_TAG_LENS aes_ccm_valid_tag_lens
+
+#define AEAD_KEY aes_ccm_key
+#define AEAD_CTX aes_ccm_ctx
+#define AEAD_PREPAREKEY aes_ccm_preparekey
+#define AEAD_ENCRYPT aes_ccm_encrypt
+#define AEAD_DECRYPT aes_ccm_decrypt
+
+#define AEAD_INIT aes_ccm_init
+#define AEAD_AUTH_UPDATE aes_ccm_auth_update
+#define AEAD_ENCRYPT_UPDATE aes_ccm_encrypt_update
+#define AEAD_DECRYPT_UPDATE aes_ccm_decrypt_update
+#define AEAD_ENCRYPT_FINAL aes_ccm_encrypt_final
+#define AEAD_DECRYPT_FINAL aes_ccm_decrypt_final
+
+/* This value was generated by gen-aead-testvecs.py. */
+static const u8 aes_ccm_monte_carlo_checksum[BLAKE2S_HASH_SIZE] = {
+ 0x70, 0x1c, 0xde, 0xa4, 0xe2, 0x03, 0x50, 0xb2, 0xf5, 0x9e, 0x61,
+ 0x66, 0xe4, 0xe5, 0x13, 0x1a, 0x00, 0x95, 0x34, 0x03, 0xb7, 0x61,
+ 0x2c, 0xdb, 0xc3, 0x15, 0x36, 0x84, 0x93, 0x7f, 0xb4, 0x5b,
+};
+#define AEAD_MONTE_CARLO_CHECKSUM aes_ccm_monte_carlo_checksum
+
+#include "aead-test-template.h"
+
+/*
+ * Test that for each AES-CCM nonce length, the message length is validated
+ * against the correct corresponding maximum message length.
+ */
+static void test_aes_ccm_data_len_too_large(struct kunit *test)
+{
+ static const struct {
+ size_t nonce_len;
+ u64 max_data_len;
+ } lens[] = {
+ /* clang-format off */
+ { 7, 0xffffffffffffffff }, /* U64_MAX */
+ { 8, 0xffffffffffffff },
+ { 9, 0xffffffffffff },
+ { 10, 0xffffffffff },
+ { 11, 0xffffffff },
+ { 12, 0xffffff },
+ { 13, 0xffff },
+ /* clang-format on */
+ };
+ u8 nonce[13] = {};
+ u8 raw_key[AES_KEYSIZE_256] = {};
+ int err;
+ struct aes_ccm_key *key = alloc_buf(test, sizeof(*key));
+ struct aes_ccm_ctx ctx;
+
+ err = aes_ccm_preparekey(key, raw_key, sizeof(raw_key), 16);
+ KUNIT_ASSERT_EQ(test, 0, err);
+
+ for (size_t i = 0; i < ARRAY_SIZE(lens); i++) {
+ size_t nonce_len = lens[i].nonce_len;
+ u64 max_data_len = lens[i].max_data_len;
+
+ /* data_len <= max_data_len should be accepted. */
+ err = aes_ccm_init(&ctx, 0, 0, nonce, nonce_len, key);
+ KUNIT_ASSERT_EQ_MSG(
+ test, 0, err,
+ "data_len=0 wasn't accepted with nonce_len=%zu",
+ nonce_len);
+ err = aes_ccm_init(&ctx, max_data_len, 0, nonce, nonce_len,
+ key);
+ KUNIT_ASSERT_EQ_MSG(
+ test, 0, err,
+ "data_len=%llu wasn't accepted with nonce_len=%zu",
+ max_data_len, nonce_len);
+
+ /* data_len > max_data_len should be rejected. */
+ if (max_data_len == U64_MAX)
+ continue;
+ err = aes_ccm_init(&ctx, max_data_len + 1, 0, nonce, nonce_len,
+ key);
+ KUNIT_ASSERT_EQ_MSG(
+ test, -EOVERFLOW, err,
+ "data_len=%llu wasn't rejected with -EOVERFLOW with nonce_len=%zu (aes_ccm_init)",
+ max_data_len + 1, nonce_len);
+ if (max_data_len + 1 <= SIZE_MAX) {
+ err = aes_ccm_encrypt(NULL, NULL, max_data_len + 1,
+ NULL, NULL, 0, nonce, nonce_len,
+ key);
+ KUNIT_ASSERT_EQ_MSG(
+ test, -EOVERFLOW, err,
+ "data_len=%llu wasn't rejected with -EOVERFLOW with nonce_len=%zu (aes_ccm_encrypt)",
+ max_data_len + 1, nonce_len);
+ err = aes_ccm_decrypt(NULL, NULL, max_data_len + 1,
+ NULL, NULL, 0, nonce, nonce_len,
+ key);
+ KUNIT_ASSERT_EQ_MSG(
+ test, -EOVERFLOW, err,
+ "data_len=%llu wasn't rejected with -EOVERFLOW with nonce_len=%zu (aes_ccm_decrypt)",
+ max_data_len + 1, nonce_len);
+ }
+ err = aes_ccm_init(&ctx, U64_MAX, 0, nonce, nonce_len, key);
+ KUNIT_ASSERT_EQ_MSG(
+ test, -EOVERFLOW, err,
+ "data_len=U64_MAX wasn't rejected with -EOVERFLOW with nonce_len=%zu (aes_ccm_init)",
+ nonce_len);
+ }
+}
+
+static struct kunit_case aes_ccm_test_cases[] = {
+ KUNIT_CASE(test_aes_ccm_test_vectors),
+ KUNIT_CASE(test_aes_ccm_nist_sp800_38c_example4),
+ KUNIT_CASE(test_aes_ccm_data_len_too_large),
+ AEAD_KUNIT_CASES,
+ {},
+};
+
+static struct kunit_suite aes_ccm_test_suite = {
+ .name = "aes_ccm",
+ .test_cases = aes_ccm_test_cases,
+};
+kunit_test_suite(aes_ccm_test_suite);
+
+MODULE_DESCRIPTION("KUnit tests and benchmark for AES-CCM");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.0.4) at 2026-08-20 23:25:22 +0000