mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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0c3ba249ab
This reduces the number of exported header files to the minimum needed by
the existing userspace utilities and firmware implementations.
BUG=chromium:221544
BRANCH=none
TEST=manual, trybots
CQ-DEPEND=CL:47019,CL:47022,CL:47023
sudo FEATURES=test emerge vboot_reference
FEATURES=test emerge-$BOARD \
vboot_reference \
chromeos-cryptohome \
chromeos-installer \
chromeos-u-boot \
peach-u-boot \
depthcharge
Change-Id: I2946cc2dbaf5459a6c5eca92ca57d546498e6d85
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/47021
Reviewed-by: Randall Spangler <rspangler@chromium.org>
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Utility functions for message digest functions.
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*/
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#include "sysincludes.h"
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#include "cryptolib.h"
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#include "utility.h"
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#include "vboot_api.h"
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void DigestInit(DigestContext* ctx, int sig_algorithm) {
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ctx->algorithm = hash_type_map[sig_algorithm];
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switch(ctx->algorithm) {
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#ifndef CHROMEOS_EC
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case SHA1_DIGEST_ALGORITHM:
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ctx->sha1_ctx = (SHA1_CTX*) VbExMalloc(sizeof(SHA1_CTX));
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SHA1_init(ctx->sha1_ctx);
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break;
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#endif
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case SHA256_DIGEST_ALGORITHM:
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ctx->sha256_ctx = (SHA256_CTX*) VbExMalloc(sizeof(SHA256_CTX));
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SHA256_init(ctx->sha256_ctx);
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break;
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#ifndef CHROMEOS_EC
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case SHA512_DIGEST_ALGORITHM:
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ctx->sha512_ctx = (SHA512_CTX*) VbExMalloc(sizeof(SHA512_CTX));
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SHA512_init(ctx->sha512_ctx);
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break;
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#endif
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};
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}
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void DigestUpdate(DigestContext* ctx, const uint8_t* data, uint32_t len) {
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switch(ctx->algorithm) {
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#ifndef CHROMEOS_EC
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case SHA1_DIGEST_ALGORITHM:
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SHA1_update(ctx->sha1_ctx, data, len);
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break;
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#endif
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case SHA256_DIGEST_ALGORITHM:
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SHA256_update(ctx->sha256_ctx, data, len);
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break;
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#ifndef CHROMEOS_EC
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case SHA512_DIGEST_ALGORITHM:
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SHA512_update(ctx->sha512_ctx, data, len);
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break;
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#endif
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};
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}
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uint8_t* DigestFinal(DigestContext* ctx) {
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uint8_t* digest = NULL;
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switch(ctx->algorithm) {
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#ifndef CHROMEOS_EC
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case SHA1_DIGEST_ALGORITHM:
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digest = (uint8_t*) VbExMalloc(SHA1_DIGEST_SIZE);
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Memcpy(digest, SHA1_final(ctx->sha1_ctx), SHA1_DIGEST_SIZE);
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VbExFree(ctx->sha1_ctx);
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break;
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#endif
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case SHA256_DIGEST_ALGORITHM:
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digest = (uint8_t*) VbExMalloc(SHA256_DIGEST_SIZE);
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Memcpy(digest, SHA256_final(ctx->sha256_ctx), SHA256_DIGEST_SIZE);
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VbExFree(ctx->sha256_ctx);
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break;
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#ifndef CHROMEOS_EC
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case SHA512_DIGEST_ALGORITHM:
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digest = (uint8_t*) VbExMalloc(SHA512_DIGEST_SIZE);
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Memcpy(digest, SHA512_final(ctx->sha512_ctx), SHA512_DIGEST_SIZE);
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VbExFree(ctx->sha512_ctx);
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break;
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#endif
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};
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return digest;
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}
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uint8_t* DigestBuf(const uint8_t* buf, uint64_t len, int sig_algorithm) {
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/* Allocate enough space for the largest digest */
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uint8_t* digest = (uint8_t*) VbExMalloc(SHA512_DIGEST_SIZE);
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/* Define an array mapping [sig_algorithm] to function pointers to the
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* SHA{1|256|512} functions.
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*/
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typedef uint8_t* (*Hash_ptr) (const uint8_t*, uint64_t, uint8_t*);
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Hash_ptr hash[] = {
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#ifdef CHROMEOS_EC
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0, /* RSA 1024 */
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0,
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0,
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0, /* RSA 2048 */
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0,
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0,
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0, /* RSA 4096 */
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internal_SHA256,
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0,
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0, /* RSA 8192 */
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0,
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0,
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#else
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internal_SHA1, /* RSA 1024 */
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internal_SHA256,
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internal_SHA512,
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internal_SHA1, /* RSA 2048 */
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internal_SHA256,
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internal_SHA512,
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internal_SHA1, /* RSA 4096 */
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internal_SHA256,
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internal_SHA512,
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internal_SHA1, /* RSA 8192 */
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internal_SHA256,
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internal_SHA512,
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#endif
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};
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/* Call the appropriate hash function. */
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return hash[sig_algorithm](buf, len, digest);
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}
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