72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
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/* mbedTLS AES performance test
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <esp_system.h>
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#include "mbedtls/aes.h"
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#include "unity.h"
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#include "sdkconfig.h"
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#include "esp_timer.h"
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#include "esp_heap_caps.h"
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#include "test_utils.h"
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TEST_CASE("mbedtls AES performance", "[aes]")
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{
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const unsigned CALLS = 256;
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const unsigned CALL_SZ = 32*1024;
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mbedtls_aes_context ctx;
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int64_t start, end;
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uint8_t iv[16];
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uint8_t key[16];
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memset(iv, 0xEE, 16);
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memset(key, 0x44, 16);
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// allocate internal memory
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uint8_t *buf = heap_caps_malloc(CALL_SZ, MALLOC_CAP_8BIT|MALLOC_CAP_INTERNAL);
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TEST_ASSERT_NOT_NULL(buf);
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mbedtls_aes_init(&ctx);
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mbedtls_aes_setkey_enc(&ctx, key, 128);
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start = esp_timer_get_time();
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for (int c = 0; c < CALLS; c++) {
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memset(buf, 0xAA, CALL_SZ);
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mbedtls_aes_crypt_cbc(&ctx, MBEDTLS_AES_ENCRYPT, CALL_SZ, iv, buf, buf);
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}
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end = esp_timer_get_time();
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/* Sanity check: make sure the last ciphertext block matches
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what we expect to see.
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Last block produced via this Python:
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import os, binascii
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from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
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from cryptography.hazmat.backends import default_backend
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key = b'\x44' * 16
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iv = b'\xee' * 16
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cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=default_backend())
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encryptor = cipher.encryptor()
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ct = encryptor.update(b'\xaa' * 256 * 32 * 1024) + encryptor.finalize()
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print(binascii.hexlify(ct[-16:]))
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*/
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const uint8_t expected_last_block[] = {
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0x50, 0x81, 0xe0, 0xe1, 0x15, 0x2f, 0x14, 0xe9,
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0x97, 0xa0, 0xc6, 0xe6, 0x36, 0xf3, 0x5c, 0x25,
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};
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TEST_ASSERT_EQUAL_HEX8_ARRAY(expected_last_block, buf + CALL_SZ - 16, 16);
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free(buf);
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float usecs = end - start;
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// bytes/usec = MB/sec
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float mb_sec = (CALL_SZ * CALLS) / usecs;
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printf("Encryption rate %.3fMB/sec\n", mb_sec);
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#ifdef CONFIG_MBEDTLS_HARDWARE_AES
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// Don't put a hard limit on software AES performance (software is approx 2.3MB/sec on Release config)
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TEST_PERFORMANCE_GREATER_THAN(AES_CBC_THROUGHPUT_MBSEC, "%.3fMB/sec", mb_sec);
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#endif
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}
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