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3855e2e948
Because all of our private key structs carry around the openssl struct rsa_st data blobs, we can use those blobs to extract the corresponding public key and generate a digest of it. This lets us match our public and private keys without having to rely on the filenames. There's no crypto verification without actually *using* them, of course, but it's handy for quick reference. BUG=chromium:231574 BRANCH=none TEST=make runtests This also adds a test to ensure that all the public and private keys generated from the same .pem file have the same sha1sums. Change-Id: If83492437e3ef37f7c4ebca4675336b75f631901 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/246768 Reviewed-by: Randall Spangler <rspangler@chromium.org>
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/* Copyright (c) 2014 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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* Host-side misc functions for verified boot.
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*/
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#ifndef VBOOT_REFERENCE_UTIL_MISC_H_
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#define VBOOT_REFERENCE_UTIL_MISC_H_
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#include "host_key.h"
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#include "vboot_struct.h"
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struct rsa_st;
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/* Prints the sha1sum of a VbPublicKey to stdout. */
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void PrintPubKeySha1Sum(VbPublicKey *key);
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/* Prints the sha1sum of a VbPrivateKey to stdout. */
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void PrintPrivKeySha1Sum(VbPrivateKey *key);
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/*
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* Our packed RSBPublicKey buffer (historically in files ending with ".keyb",
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* but also the part of VbPublicKey and struct vb2_packed_key that is
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* referenced by .key_offset) has this binary format:
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*
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* struct {
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* uint32_t nwords; // size of RSA key in 32-bit words
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* uint32_t N0inv; // -1 / N[0] mod 2^32
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* uint32_t modulus[nwords]; // modulus as a little endian array
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* uint32_t R2[nwords]; // R^2 as little endian array
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* };
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*
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* This function allocates and extracts that binary structure directly
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* from the RSA private key, rather than from a file.
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*
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* @param rsa_private_key RSA private key (duh)
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* @param keyb_data Pointer to newly allocated binary blob
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* @param keyb_size Size of newly allocated binary blob
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*
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* @return 0 on success, non-zero if unable to allocate enough memory.
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*/
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int vb_keyb_from_rsa(struct rsa_st *rsa_private_key,
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uint8_t **keyb_data, uint32_t *keyb_size);
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#endif /* VBOOT_REFERENCE_UTIL_MISC_H_ */
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