Move print_buf into mbedtls_test_print_buf helper function in sample programs
Reduce code duplication and fix missing-prototype error for print_buf
Signed-off-by: Michael Schuster <michael@schuster.ms>
diff --git a/programs/hash/md_hmac_demo.c b/programs/hash/md_hmac_demo.c
index 581816a..a0127ed 100644
--- a/programs/hash/md_hmac_demo.c
+++ b/programs/hash/md_hmac_demo.c
@@ -32,6 +32,8 @@
#include "mbedtls/platform_util.h" // for mbedtls_platform_zeroize
+#include <test/helpers.h>
+
#include <stdlib.h>
#include <stdio.h>
@@ -56,16 +58,6 @@
* This example program uses SHA-256, so a 32-byte key makes sense. */
const unsigned char key_bytes[32] = { 0 };
-/* Print the contents of a buffer in hex */
-void print_buf(const char *title, unsigned char *buf, size_t len)
-{
- printf("%s:", title);
- for (size_t i = 0; i < len; i++) {
- printf(" %02x", buf[i]);
- }
- printf("\n");
-}
-
/* Run an Mbed TLS function and bail out if it fails.
* A string description of the error code can be recovered with:
* programs/util/strerror <value> */
@@ -107,14 +99,14 @@
CHK(mbedtls_md_hmac_update(&ctx, msg1_part1, sizeof(msg1_part1)));
CHK(mbedtls_md_hmac_update(&ctx, msg1_part2, sizeof(msg1_part2)));
CHK(mbedtls_md_hmac_finish(&ctx, out));
- print_buf("msg1", out, mbedtls_md_get_size(info));
+ mbedtls_test_print_buf("msg1", out, mbedtls_md_get_size(info));
/* compute HMAC(key, msg2_part1 | msg2_part2) */
CHK(mbedtls_md_hmac_reset(&ctx)); // prepare for new operation
CHK(mbedtls_md_hmac_update(&ctx, msg2_part1, sizeof(msg2_part1)));
CHK(mbedtls_md_hmac_update(&ctx, msg2_part2, sizeof(msg2_part2)));
CHK(mbedtls_md_hmac_finish(&ctx, out));
- print_buf("msg2", out, mbedtls_md_get_size(info));
+ mbedtls_test_print_buf("msg2", out, mbedtls_md_get_size(info));
exit:
mbedtls_md_free(&ctx);