src/security/tpm/tss/tcg-1.2/tss_internal.h

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2
   3 #ifndef TCG_TSS_INTERNAL_H_
   4 #define TCG_TSS_INTERNAL_H_
   5
   6 #include <stdint.h>
   7
   8 /*
   9  * These numbers derive from adding the sizes of command fields as shown in the
  10  * TPM commands manual.
  11  */
  12 #define kTpmRequestHeaderLength 10
  13 #define kTpmResponseHeaderLength 10
  14 #define kTpmReadInfoLength 12
  15 #define kEncAuthLength 20
  16 #define kPcrDigestLength 20
  17
  18 /*
  19  * Conversion functions.  to_tpm_TYPE puts a value of type TYPE into a TPM
  20  * command buffer. from_tpm_TYPE gets a value of type TYPE from a TPM command
  21  * buffer into a variable.
  22  */
  23 __attribute__((unused))
  24 static inline void to_tpm_uint32(uint8_t *buffer, uint32_t x)
  25 {
  26         buffer[0] = (uint8_t)(x >> 24);
  27         buffer[1] = (uint8_t)((x >> 16) & 0xff);
  28         buffer[2] = (uint8_t)((x >> 8) & 0xff);
  29         buffer[3] = (uint8_t)(x & 0xff);
  30 }
  31
  32 /*
  33  * See comment for above function.
  34  */
  35 __attribute__((unused))
  36 static inline void from_tpm_uint32(const uint8_t *buffer, uint32_t *x)
  37 {
  38         *x = ((buffer[0] << 24) |
  39               (buffer[1] << 16) |
  40               (buffer[2] << 8) |
  41               buffer[3]);
  42 }
  43
  44 /*
  45  * See comment for above function.
  46  */
  47 __attribute__((unused))
  48 static inline void to_tpm_uint16(uint8_t *buffer, uint16_t x)
  49 {
  50         buffer[0] = (uint8_t)(x >> 8);
  51         buffer[1] = (uint8_t)(x & 0xff);
  52 }
  53
  54 /*
  55  * See comment for above function.
  56  */
  57 __attribute__((unused))
  58 static inline void from_tpm_uint16(const uint8_t *buffer, uint16_t *x)
  59 {
  60         *x = (buffer[0] << 8) | buffer[1];
  61 }
  62
  63 #endif  /* TCG_TSS_INTERNAL_H_ */