test(esp_security): Update the Key Manager test to support ESP32-P4

2026-04-27 19:13:21 +00:00 · 2026-02-10 17:35:19 +05:30
parent 5b5ee24f1f
commit 6964de6f45
6 changed files with 115 additions and 25 deletions
@@ -41,8 +41,21 @@ typedef struct {

 #if SOC_RSA_MAX_BIT_LEN == 4096
 #include "digital_signature_test_cases_4096.h"
+
+// Note: generated using the hmac_key_idx = 2 of digital_signature_test_cases_4096
+#define DS_KEY_IDX 1
+static const uint8_t k1_ds_encrypt[] = {
+    0xf1, 0xbf, 0xa0, 0x27, 0x83, 0x02, 0x85, 0x94, 0x07, 0xb4, 0x20, 0x46, 0x1f, 0x1d, 0x4e, 0x24, 0x1d, 0x38, 0xcb, 0x21, 0xed, 0xcf, 0x85, 0x79, 0xe7, 0x17, 0xbf, 0x9d, 0xbb, 0xb8, 0x6f, 0xbd
+};
+
 #elif SOC_RSA_MAX_BIT_LEN == 3072
 #include "digital_signature_test_cases_3072.h"
+
+// Note: generated using the hmac_key_idx = 0 of digital_signature_test_cases_3072
+#define DS_KEY_IDX 0
+static const uint8_t k1_ds_encrypt[] = {
+    0xdc, 0xcc, 0x8e, 0xd4, 0x66, 0xb4, 0x1a, 0x4b, 0x9f, 0xba, 0xa3, 0x2e, 0x99, 0x6b, 0x45, 0x07, 0xd4, 0xf6, 0xe4, 0x4e, 0x6f, 0x26, 0xca, 0x20, 0xbd, 0xb4, 0x98, 0x7c, 0x32, 0x4f, 0x21, 0x55
+};
 #endif
 #endif /* SOC_KEY_MANAGER_DS_KEY_DEPLOY */

@@ -61,14 +74,14 @@ static const uint8_t plaintext_data[ENCRYPTED_DATA_SIZE] = {
 };

 static const uint8_t expected_ciphertext[ENCRYPTED_DATA_SIZE] = {
-    0xf9, 0xb6, 0x08, 0x0f, 0xfb, 0x37, 0x46, 0xe4, 0x99, 0x3c, 0xf9, 0x29, 0xab, 0x90, 0xd5, 0x3f,
-    0xc8, 0x70, 0x45, 0xae, 0x28, 0x16, 0xbd, 0x83, 0x66, 0x16, 0x83, 0x86, 0x01, 0xc9, 0xa2, 0x97,
-    0xa4, 0xf6, 0xf0, 0x40, 0xb5, 0xfd, 0xb7, 0x13, 0x60, 0xc3, 0x39, 0xf2, 0x32, 0x5a, 0xa3, 0x89,
-    0xfd, 0x77, 0x9c, 0x6b, 0x0e, 0x98, 0xdf, 0x8f, 0xf7, 0xcc, 0x2a, 0x1e, 0xce, 0xdc, 0xef, 0x41,
-    0xac, 0x0f, 0x48, 0x97, 0xa1, 0x1a, 0xc0, 0x82, 0x42, 0x7e, 0x1a, 0x35, 0xcd, 0xcb, 0x2b, 0x1d,
-    0x72, 0xc6, 0x78, 0xab, 0x35, 0x58, 0xd1, 0xe3, 0xb1, 0x61, 0x8d, 0x11, 0x70, 0x91, 0x62, 0xb4,
-    0x5f, 0xdd, 0x75, 0x2f, 0x78, 0xc4, 0x95, 0x67, 0x3a, 0xd3, 0x87, 0x02, 0x35, 0x78, 0x48, 0xef,
-    0xf2, 0xde, 0xdb, 0x59, 0xda, 0x33, 0xa6, 0x27, 0xdd, 0x33, 0x18, 0x0c, 0x57, 0x24, 0x95, 0x38,
+    0xa, 0x6, 0x88, 0xb9, 0x9f, 0x3e, 0xff, 0xf5, 0x63, 0x37, 0xa2, 0xd6, 0xbb, 0x71, 0x50, 0x89,
+    0xa7, 0xbf, 0xa1, 0x5d, 0x3a, 0xc7, 0x18, 0x66, 0xa7, 0xab, 0x5f, 0x7, 0xd, 0x7c, 0xad, 0xcc,
+    0x8c, 0x9a, 0xc7, 0xff, 0x10, 0xf6, 0xab, 0xef, 0x62, 0x71, 0xdf, 0xc, 0x60, 0x18, 0x4f, 0xa2,
+    0x2c, 0x55, 0x14, 0x41, 0xd5, 0xfc, 0x87, 0x44, 0xe1, 0xd1, 0xd1, 0x78, 0x76, 0x9f, 0x43, 0x87,
+    0xa0, 0xb4, 0xea, 0x66, 0xbc, 0x56, 0x35, 0x39, 0x53, 0x60, 0xa6, 0xea, 0x1e, 0x7d, 0x48, 0x17,
+    0x6e, 0x58, 0x4c, 0x68, 0xc0, 0xfb, 0x54, 0x35, 0x92, 0x7b, 0x89, 0x9f, 0x69, 0x33, 0x1, 0x17,
+    0x85, 0xe2, 0x69, 0x26, 0xfb, 0x61, 0x7e, 0x15, 0x11, 0x26, 0x59, 0xf1, 0x4f, 0xeb, 0x4d, 0x25,
+    0x8e, 0xc5, 0xb9, 0x64, 0xdf, 0xc7, 0x52, 0x87, 0x2d, 0xb, 0xd6, 0xdd, 0xb1, 0xb3, 0xfe, 0xaf,
 };

 /* Big endian */
@@ -79,27 +92,21 @@ static const uint8_t init_key[] = {

 /* Big endian */
 static const uint8_t k2_info[] = {
-    0x8f, 0x96, 0x33, 0x47, 0xe1, 0xa5, 0x57, 0xe9, 0x2a, 0x51, 0xa9, 0xbe, 0x48, 0x84, 0x25, 0x4e,
-    0x6f, 0x50, 0x1c, 0x45, 0xdb, 0xb6, 0xfa, 0xeb, 0x35, 0xd2, 0x27, 0x91, 0x3f, 0x67, 0x57, 0xd9,
-    0xcb, 0x55, 0xe4, 0x2b, 0x18, 0x16, 0xe7, 0xce, 0x6c, 0xf2, 0x58, 0x71, 0x17, 0x76, 0x2a, 0x86,
-    0x05, 0xe7, 0x37, 0x45, 0x71, 0x34, 0xca, 0xaf, 0x60, 0x07, 0xdf, 0xf4, 0xd2, 0xee, 0x3d, 0x4b,
+    0xba, 0x7f, 0xe1, 0x43, 0xce, 0x19, 0xaf, 0xe8, 0xee, 0x04, 0x17, 0xcf, 0x67, 0x9d, 0xf4, 0xeb,
+    0x44, 0x12, 0x6f, 0xee, 0x9f, 0xfe, 0x9f, 0x5f, 0x20, 0x18, 0x9f, 0x27, 0x3f, 0xcb, 0x7b, 0xba,
+    0x92, 0x37, 0x07, 0x92, 0x47, 0xee, 0x1a, 0xbe, 0xa8, 0x7e, 0x32, 0x70, 0xc1, 0x05, 0x42, 0xe4,
+    0x88, 0x9d, 0x0b, 0x2b, 0x40, 0x87, 0x6e, 0x58, 0xf3, 0xf3, 0x63, 0x62, 0xd1, 0x5c, 0x9a, 0xe8
 };

 /* Big endian */
-static const uint8_t k1_encrypt[] = {
-    0xe0, 0xe8, 0x41, 0xe3, 0xd0, 0x92, 0x71, 0x84, 0x4b, 0x02, 0x1e, 0xec, 0x14, 0xdd, 0xaf, 0xf8,
-    0x39, 0xf9, 0x6a, 0x8d, 0x1b, 0xd7, 0x64, 0x3b, 0x7b, 0xa6, 0x05, 0x42, 0x01, 0xfb, 0xab, 0xe1,
+static const uint8_t k1_xts_aes_encrypt[] = {
+    0x0a, 0x43, 0x2a, 0xee, 0xb5, 0xd0, 0x6b, 0x58, 0x34, 0x2d, 0x0d, 0xbf, 0xf7, 0x04, 0x60, 0x81,
+    0x08, 0x79, 0x38, 0xb3, 0xb5, 0xdf, 0x25, 0xb4, 0x38, 0x8e, 0x93, 0x5d, 0xbf, 0xd1, 0x91, 0x6d,
 };

 static const uint8_t k1_hmac_encrypt[] = {
-    0x9e, 0xd8, 0x62, 0x4f, 0x27, 0xe1, 0x13, 0xfc, 0x50, 0x4b, 0x7f, 0x68, 0x70, 0x7b, 0xa1, 0xb2,
-    0xb1, 0x75, 0x21, 0x43, 0x88, 0x7d, 0xed, 0x4b, 0x58, 0x27, 0xb4, 0x15, 0x57, 0xc2, 0x46, 0x78,
-};
-
-// Note: generated using the hmac_key_idx = 0 of digital_signature_test_cases_3072
-static const uint8_t k1_ds_encrypt[] = {
-    0xa9, 0xf7, 0xd1, 0xd9, 0xaa, 0x80, 0xfa, 0x6f, 0xfa, 0x34, 0xf6, 0x66, 0xbf, 0xba, 0x7b, 0xc9,
-    0xa9, 0xf4, 0xeb, 0xba, 0x43, 0x61, 0x59, 0x32, 0x5d, 0xa0, 0xda, 0xd9, 0x0d, 0xc7, 0xde, 0xb2,
+    0x02, 0xf7, 0x05, 0x75, 0xfd, 0x12, 0x99, 0xc2, 0xb9, 0xc0, 0x2e, 0x40, 0xd0, 0x69, 0xb0, 0x83,
+    0x13, 0xfc, 0x74, 0xc3, 0xec, 0x4f, 0xf4, 0xd4, 0xe2, 0x35, 0xb5, 0x42, 0x4e, 0x61, 0x0f, 0x6d,
 };

 static const uint8_t k1_G[] = {
@@ -144,7 +151,7 @@ TEST_CASE("Key Manager AES mode: XTS-AES-128 key deployment", "[hw_crypto] [key_
    TEST_ASSERT_NOT_NULL(key_config);

    memcpy(key_config->k2_info, (uint8_t*) k2_info, KEY_MGR_K2_INFO_SIZE);
-    memcpy(key_config->k1_encrypted, (uint8_t*) k1_encrypt, KEY_MGR_K1_ENCRYPTED_SIZE);
+    memcpy(key_config->k1_encrypted, (uint8_t*) k1_xts_aes_encrypt, KEY_MGR_K1_ENCRYPTED_SIZE);
    memcpy(key_config->sw_init_key, (uint8_t*) init_key, KEY_MGR_SW_INIT_KEY_SIZE);
    key_config->use_pre_generated_sw_init_key = 1;
    key_config->key_type = ESP_KEY_MGR_FLASH_XTS_AES_KEY;
@@ -317,7 +324,7 @@ static esp_err_t test_ds_key(void)
    for (int i = 0; i < NUM_MESSAGES; i++) {
        printf("Running test case %d...\n", i);
        const encrypt_testcase_t *t = &test_cases[0];
-        assert(t->hmac_key_idx == 0); // as the key deployed using Key Manager is the HMAC key ID 0
+        assert(t->hmac_key_idx == DS_KEY_IDX); // as the key deployed using Key Manager is the HMAC key with index DS_KEY_IDX

        // copy encrypt parameter test case into ds_data structure
        memcpy(ds_data.iv, t->iv, ESP_DS_IV_LEN);
@@ -0,0 +1,80 @@
+# SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Unlicense OR CC0-1.0
+import hashlib
+import hmac
+import os
+from typing import Any
+
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives.ciphers import Cipher
+from cryptography.hazmat.primitives.ciphers import algorithms
+from cryptography.hazmat.primitives.ciphers import modes
+
+
+def key_to_c_format(key: bytes) -> str:
+    return ', '.join([f'0x{byte:02x}' for byte in key])
+
+
+def calculate_aes_cipher(data: bytes, key: bytes) -> Any:
+    cipher = Cipher(algorithms.AES(key), modes.ECB(), backend=default_backend())
+    encryptor = cipher.encryptor()
+    return encryptor.update(data) + encryptor.finalize()
+
+
+# Helper functions
+def generate_random_key(size: int = 32) -> bytes:
+    return os.urandom(size)
+
+
+def save_key_to_file(key: bytes, filename: str) -> None:
+    with open(filename, 'wb') as file:
+        file.write(key)
+
+
+def key_from_file_or_generate(filename: str, size: int = 32) -> bytes:
+    if not os.path.exists(filename):
+        key = generate_random_key(size)
+        save_key_to_file(key, filename)
+
+    with open(filename, 'rb') as file:
+        return file.read()
+
+
+init_key = key_from_file_or_generate('init_key.bin', 32)
+k2 = key_from_file_or_generate('k2.bin', 32)
+rand_num = key_from_file_or_generate('rand_num.bin', 32)
+
+temp_result_inner = calculate_aes_cipher(k2, rand_num)
+temp_result_outer = calculate_aes_cipher(temp_result_inner + rand_num, init_key)
+k2_info = temp_result_outer
+
+print(f'init_key = {key_to_c_format(init_key)}')
+print(f'k2_info = {key_to_c_format(k2_info)}')
+
+# XTS-AES key
+k1_xts_aes = key_from_file_or_generate('k1_xts_aes.bin', 32)
+k1_xts_aes_reversed = k1_xts_aes[::-1]
+k1_xts_aes_encrypted_reversed = calculate_aes_cipher(k1_xts_aes_reversed, k2)
+print(f'k1_xts_aes_encrypt = {key_to_c_format(k1_xts_aes_encrypted_reversed)}')
+
+# HMAC Key
+# Key from hmac_test_cases.h
+# k1_hmac_reversed = bytes([
+#     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+#     17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32
+# ])
+k1_hmac_reversed = bytes([])
+k1_hmac_encrypted_reversed = calculate_aes_cipher(k1_hmac_reversed, k2)
+print(f'k1_hmac_encrypt = {key_to_c_format(k1_hmac_encrypted_reversed)}')
+
+# Digital Signature
+# Key DS_KEY_IDX from digital_signature_test_cases_<bits>.h
+# hmac_key_for_ds = bytes([
+#     0x3d, 0x71, 0xd5, 0xc7, 0xe0, 0x15, 0xe6, 0x30, 0x66, 0xe8, 0xee, 0x5d, 0x14, 0x1e, 0xe1, 0xa1,
+#     0x03, 0xd9, 0x7d, 0x48, 0x16, 0xde, 0xbc, 0xba, 0xaa, 0xf4, 0x3e, 0xd5, 0xb2, 0xbc, 0x46, 0xbc
+# ])
+hmac_key_for_ds = bytes([])
+k1_ds = hmac.HMAC(hmac_key_for_ds, b'\xff' * 32, hashlib.sha256).digest()
+k1_ds_reversed = k1_ds[::-1]
+k1_ds_encrypted_reversed = calculate_aes_cipher(k1_ds_reversed, k2)
+print(f'k1_ds_encrypt = {key_to_c_format(k1_ds_encrypted_reversed)}')
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