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https://github.com/Telecominfraproject/OpenCellular.git
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f5564fa98c
This CL does the following: 1) It adds a SignatureBuf function which uses the OpenSSL library to generate RSA signature. This is more robust than the previous way of invoking the command line "openssl" utility and capturing its output. No more unnecessary temporary files for signature operations. 2) It adds functions that allow direct manipulation of binary verified Firmware and Kernel Image blobs in memory. 3) It changes the structure field members for FirmwareImage to make it consistent with KernelImage. Now it's clearer which key is used when. 4) Minor bug fixes and slightly improved API for dealing verified boot firmware and kernel images. 5) Renames the RSA_verify function to prevent conflicts with OpenSSL since it's linked into the firmware utility binary. Review URL: http://codereview.chromium.org/661353
63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/* Copyright (c) 2010 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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/* Helper functions/wrappers for memory allocations, manipulation and
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* comparison.
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*/
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#ifndef VBOOT_REFERENCE_UTILITY_H_
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#define VBOOT_REFERENCE_UTILITY_H_
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#include <inttypes.h>
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#include <string.h>
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/* Allocate [size] bytes and return a pointer to the allocated memory. Abort
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* on error.
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*/
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void* Malloc(size_t size);
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/* Free memory pointed by [ptr] previously allocated by Malloc(). */
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void Free(void* ptr);
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/* Copy [n] bytes from [src] to [dest]. */
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void* Memcpy(void* dest, const void* src, size_t n);
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/* Set [n] bytes starting at [s] to [c]. */
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void* Memset(void *dest, const uint8_t c, size_t n);
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/* Compare [n] bytes starting at [s1] with [s2] and return 0 if they match,
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* 1 if they don't. Time taken to perform the comparison is only dependent on
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* [n] and not on the relationship of the match between [s1] and [s2].
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*/
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int SafeMemcmp(const void* s1, const void* s2, size_t n);
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/* Track remaining data to be read in a buffer. */
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typedef struct MemcpyState {
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void* remaining_buf;
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int remaining_len;
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} MemcpyState;
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/* Copy [len] bytes into [dst] only if there's enough data to read according
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* to [state].
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* On success, return [dst] and update [state].
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* On failure, return NULL, set remaining len in state to -1.
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*
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* Useful for iterating through a binary blob to populate a struct. After the
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* first failure (buffer overrun), successive calls will always fail.
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*/
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void* StatefulMemcpy(MemcpyState* state, void* dst, int len);
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/* Like StatefulMemcpy() but copies in the opposite direction, populating
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* data from [src] into the buffer encapsulated in state [state].
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* On success, return [src] and update [state].
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* On failure, return NULL, set remaining_len in state to -1.
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*
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* Useful for iterating through a structure to populate a binary blob. After the
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* first failure (buffer overrun), successive calls will always fail.
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*/
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const void* StatefulMemcpy_r(MemcpyState* state, const void* src, int len);
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#endif /* VBOOT_REFERENCE_UTILITY_H_ */
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