utzig commented on a change in pull request #2174: Updates to crypto_test app;
STM32 crypto HW driver; CBC/CTR speed
URL: https://github.com/apache/mynewt-core/pull/2174#discussion_r387698511
##########
File path: apps/crypto_test/src/main.c
##########
@@ -282,6 +286,66 @@ run_benchmark(char *name, block_encrypt_func_t encfn,
void *data, uint8_t iter)
}
printf("done in %lu ticks\n", os_time_get() - t);
}
+
+static void
+run_cbc_bench(struct crypto_dev *crypto, uint8_t iter)
+{
+ int i, j;
+ uint8_t iv[AES_BLOCK_LEN];
+ uint8_t output[AES_BLOCK_LEN];
+ uint16_t blkidx;
+ os_time_t t;
+
+ printf("AES-128-CBC - running %d iterations of 4096 block encrypt... ",
iter);
+ t = os_time_get();
+ for (i = 0; i < iter; i++) {
+ memcpy(iv, aes_128_cbc_iv, AES_BLOCK_LEN);
+ for (blkidx = 0; blkidx < 4096; blkidx += AES_BLOCK_LEN) {
+ (void)crypto_encrypt_aes_cbc(crypto, aes_128_key, 128, iv,
+ &aes_128_input[blkidx], output, AES_BLOCK_LEN);
+ if (memcmp(output, &aes_128_cbc_expected[blkidx],
+ AES_BLOCK_LEN)) {
+ printf("fail... blkidx=%u\n", blkidx);
+ for (j = 0; j < AES_BLOCK_LEN; j++) {
+ printf("[%02x]<%02x> ", output[j],
+ aes_128_cbc_expected[blkidx + j]);
+ }
+ return;
+ }
+ }
+ }
+ printf("done in %lu ticks\n", os_time_get() - t);
Review comment:
Comparing to different boards is not relevant IMO, what is being done here
is to compare the HW acceleration speed to SW implementations using
tinycrypt/mbedTLS.
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