147 lines
4.0 KiB
C++
147 lines
4.0 KiB
C++
// Copyright 2017 Google Inc. All Rights Reserved.
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/*********************************************************************
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* pst_report.h
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*
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* Reference APIs needed to support Widevine's crypto algorithms.
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*********************************************************************/
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#ifndef PST_REPORT_H_
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#define PST_REPORT_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include "OEMCryptoCENC.h"
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#include "string_conversions.h" // needed for htonll64.
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namespace wvcdm {
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class Unpacked_PST_Report {
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public:
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// This object does not own the buffer, and does not check that buffer
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// is not null.
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Unpacked_PST_Report(uint8_t *buffer) : buffer_(buffer) {}
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// Copy and move semantics of this class is like that of a pointer.
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Unpacked_PST_Report(const Unpacked_PST_Report& other) :
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buffer_(other.buffer_) {}
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Unpacked_PST_Report& operator=(const Unpacked_PST_Report& other) {
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buffer_ = other.buffer_;
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return *this;
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}
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size_t report_size() const {
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return pst_length() + kraw_pst_report_size;
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}
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static size_t report_size(size_t pst_length) {
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return pst_length + kraw_pst_report_size;
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}
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uint8_t status() const {
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return static_cast<uint8_t>(* (buffer_ + kstatus_offset));
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}
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void set_status(uint8_t value) {
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buffer_[kstatus_offset] = value;
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}
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uint8_t* signature() {
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return buffer_ + ksignature_offset;
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}
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uint8_t clock_security_level() const {
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return static_cast<uint8_t>(* (buffer_ + kclock_security_level_offset));
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}
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void set_clock_security_level(uint8_t value) {
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buffer_[kclock_security_level_offset] = value;
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}
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uint8_t pst_length() const {
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return static_cast<uint8_t>(* (buffer_ + kpst_length_offset));
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}
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void set_pst_length(uint8_t value) {
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buffer_[kpst_length_offset] = value;
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}
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uint8_t padding() const {
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return static_cast<uint8_t>(* (buffer_ + kpadding_offset));
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}
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void set_padding(uint8_t value) {
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buffer_[kpadding_offset] = value;
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}
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// In host byte order.
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int64_t seconds_since_license_received() const {
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int64_t time;
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memcpy(&time, buffer_ + kseconds_since_license_received_offset,
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sizeof(int64_t));
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return wvcdm::ntohll64(time);
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}
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// Parameter time is in host byte order.
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void set_seconds_since_license_received(int64_t time) const {
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time = wvcdm::ntohll64(time);
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memcpy(buffer_ + kseconds_since_license_received_offset, &time,
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sizeof(int64_t));
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}
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// In host byte order.
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int64_t seconds_since_first_decrypt() const {
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int64_t time;
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memcpy(&time, buffer_ + kseconds_since_first_decrypt_offset,
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sizeof(int64_t));
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return wvcdm::ntohll64(time);
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}
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// Parameter time is in host byte order.
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void set_seconds_since_first_decrypt(int64_t time) const {
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time = wvcdm::ntohll64(time);
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memcpy(buffer_ + kseconds_since_first_decrypt_offset, &time,
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sizeof(int64_t));
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}
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// In host byte order.
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int64_t seconds_since_last_decrypt() const {
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int64_t time;
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memcpy(&time, buffer_ + kseconds_since_last_decrypt_offset,
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sizeof(int64_t));
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return wvcdm::ntohll64(time);
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}
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// Parameter time is in host byte order.
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void set_seconds_since_last_decrypt(int64_t time) const {
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time = wvcdm::ntohll64(time);
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memcpy(buffer_ + kseconds_since_last_decrypt_offset, &time,
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sizeof(int64_t));
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}
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uint8_t* pst() {
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return (buffer_ + kpst_offset);
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}
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private:
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uint8_t *buffer_;
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// Size of the PST_Report without the pst string.
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static const size_t kraw_pst_report_size = 48;
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static const size_t ksignature_offset = 0;
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static const size_t kstatus_offset = 20;
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static const size_t kclock_security_level_offset = 21;
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static const size_t kpst_length_offset = 22;
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static const size_t kpadding_offset = 23;
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static const size_t kseconds_since_license_received_offset = 24;
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static const size_t kseconds_since_first_decrypt_offset = 32;
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static const size_t kseconds_since_last_decrypt_offset = 40;
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static const size_t kpst_offset = 48;
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};
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} // namespace wvcdm
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#endif // PST_REPORT_H_
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