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Diffstat (limited to 'src/lib/tlcl_internal.h')
-rw-r--r-- | src/lib/tlcl_internal.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/lib/tlcl_internal.h b/src/lib/tlcl_internal.h new file mode 100644 index 0000000000..51fe6ef3f0 --- /dev/null +++ b/src/lib/tlcl_internal.h @@ -0,0 +1,61 @@ +/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef TPM_LITE_TLCL_INTERNAL_H_ +#define TPM_LITE_TLCL_INTERNAL_H_ + +/* + * These numbers derive from adding the sizes of command fields as shown in the + * TPM commands manual. + */ +#define kTpmRequestHeaderLength 10 +#define kTpmResponseHeaderLength 10 +#define kTpmReadInfoLength 12 +#define kEncAuthLength 20 +#define kPcrDigestLength 20 + + +/* + * Conversion functions. ToTpmTYPE puts a value of type TYPE into a TPM + * command buffer. FromTpmTYPE gets a value of type TYPE from a TPM command + * buffer into a variable. + */ +__attribute__((unused)) +static inline void ToTpmUint32(uint8_t *buffer, uint32_t x) { + buffer[0] = (uint8_t)(x >> 24); + buffer[1] = (uint8_t)((x >> 16) & 0xff); + buffer[2] = (uint8_t)((x >> 8) & 0xff); + buffer[3] = (uint8_t)(x & 0xff); +} + +/* + * See comment for above function. + */ +__attribute__((unused)) +static inline void FromTpmUint32(const uint8_t *buffer, uint32_t *x) { + *x = ((buffer[0] << 24) | + (buffer[1] << 16) | + (buffer[2] << 8) | + buffer[3]); +} + +/* + * See comment for above function. + */ +__attribute__((unused)) +static inline void ToTpmUint16(uint8_t *buffer, uint16_t x) { + buffer[0] = (uint8_t)(x >> 8); + buffer[1] = (uint8_t)(x & 0xff); +} + +/* + * See comment for above function. + */ +__attribute__((unused)) +static inline void FromTpmUint16(const uint8_t *buffer, uint16_t *x) { + *x = (buffer[0] << 8) | buffer[1]; +} + +#endif /* TPM_LITE_TLCL_INTERNAL_H_ */ |