62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
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/* 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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#ifndef TPM_LITE_TLCL_INTERNAL_H_
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#define TPM_LITE_TLCL_INTERNAL_H_
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/*
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* These numbers derive from adding the sizes of command fields as shown in the
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* TPM commands manual.
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*/
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#define kTpmRequestHeaderLength 10
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#define kTpmResponseHeaderLength 10
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#define kTpmReadInfoLength 12
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#define kEncAuthLength 20
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#define kPcrDigestLength 20
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/*
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* Conversion functions. ToTpmTYPE puts a value of type TYPE into a TPM
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* command buffer. FromTpmTYPE gets a value of type TYPE from a TPM command
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* buffer into a variable.
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*/
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__attribute__((unused))
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static inline void ToTpmUint32(uint8_t *buffer, uint32_t x) {
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buffer[0] = (uint8_t)(x >> 24);
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buffer[1] = (uint8_t)((x >> 16) & 0xff);
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buffer[2] = (uint8_t)((x >> 8) & 0xff);
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buffer[3] = (uint8_t)(x & 0xff);
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}
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/*
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* See comment for above function.
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*/
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__attribute__((unused))
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static inline void FromTpmUint32(const uint8_t *buffer, uint32_t *x) {
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*x = ((buffer[0] << 24) |
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(buffer[1] << 16) |
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(buffer[2] << 8) |
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buffer[3]);
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}
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/*
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* See comment for above function.
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*/
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__attribute__((unused))
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static inline void ToTpmUint16(uint8_t *buffer, uint16_t x) {
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buffer[0] = (uint8_t)(x >> 8);
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buffer[1] = (uint8_t)(x & 0xff);
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}
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/*
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* See comment for above function.
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*/
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__attribute__((unused))
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static inline void FromTpmUint16(const uint8_t *buffer, uint16_t *x) {
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*x = (buffer[0] << 8) | buffer[1];
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}
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#endif /* TPM_LITE_TLCL_INTERNAL_H_ */
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