From bdc3f44a6bf4de61d99c818b3e8e71b07a9eea52 Mon Sep 17 00:00:00 2001 From: Raymond Mao Date: Thu, 3 Oct 2024 14:50:19 -0700 Subject: mbedtls: add digest shim layer for MbedTLS Implement digest shim layer on top of MbedTLS crypto library. Introduce _MBEDTLS kconfig for MbedTLS crypto implementations. Signed-off-by: Raymond Mao --- lib/mbedtls/md5.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 lib/mbedtls/md5.c (limited to 'lib/mbedtls/md5.c') diff --git a/lib/mbedtls/md5.c b/lib/mbedtls/md5.c new file mode 100644 index 00000000000..04388fce249 --- /dev/null +++ b/lib/mbedtls/md5.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Hash shim layer on MbedTLS Crypto library + * + * Copyright (c) 2024 Linaro Limited + * Author: Raymond Mao + */ +#include "compiler.h" + +#ifndef USE_HOSTCC +#include +#endif /* USE_HOSTCC */ +#include + +void MD5Init(MD5Context *ctx) +{ + mbedtls_md5_init(ctx); + mbedtls_md5_starts(ctx); +} + +void MD5Update(MD5Context *ctx, unsigned char const *buf, unsigned int len) +{ + mbedtls_md5_update(ctx, buf, len); +} + +void MD5Final(unsigned char digest[16], MD5Context *ctx) +{ + mbedtls_md5_finish(ctx, digest); + mbedtls_md5_free(ctx); +} + +void md5_wd(const unsigned char *input, unsigned int len, + unsigned char output[16], unsigned int chunk_sz) +{ + MD5Context context; + + MD5Init(&context); + + if (IS_ENABLED(CONFIG_HW_WATCHDOG) || IS_ENABLED(CONFIG_WATCHDOG)) { + const unsigned char *curr = input; + const unsigned char *end = input + len; + int chunk; + + while (curr < end) { + chunk = end - curr; + if (chunk > chunk_sz) + chunk = chunk_sz; + MD5Update(&context, curr, chunk); + curr += chunk; + schedule(); + } + } else { + MD5Update(&context, input, len); + } + + MD5Final(output, &context); +} -- cgit v1.2.3