Index: rlz/lib/machine_id.cc |
=================================================================== |
--- rlz/lib/machine_id.cc (revision 0) |
+++ rlz/lib/machine_id.cc (revision 0) |
@@ -0,0 +1,80 @@ |
+#include "rlz/lib/machine_id.h" |
+ |
+#include "base/sha1.h" |
+#include "rlz/lib/assert.h" |
+#include "rlz/lib/crc8.h" |
+#include "rlz/lib/string_utils.h" |
+ |
+namespace rlz_lib { |
+ |
+bool GetMachineId(std::string* machine_id) { |
+ if (!machine_id) |
+ return false; |
+ |
+ static std::string calculated_id; |
+ static bool calculated = false; |
+ if (calculated) { |
+ *machine_id = calculated_id; |
+ return true; |
+ } |
+ |
+ string16 sid_string; |
+ int volume_id; |
+ if (!GetRawMachineId(&sid_string, &volume_id)) |
+ return false; |
+ |
+ if (!testing::GetMachineIdImpl(sid_string, volume_id, machine_id)) |
+ return false; |
+ |
+ calculated = true; |
+ calculated_id = *machine_id; |
+ return true; |
+} |
+ |
+namespace testing { |
+ |
+bool GetMachineIdImpl(const string16& sid_string, |
+ int volume_id, |
+ std::string* machine_id) { |
+ machine_id->clear(); |
+ |
+ // The ID should be the SID hash + the Hard Drive SNo. + checksum byte. |
+ static const int kSizeWithoutChecksum = base::kSHA1Length + sizeof(int); |
+ std::basic_string<unsigned char> id_binary(kSizeWithoutChecksum + 1, 0); |
+ |
+ if (!sid_string.empty()) { |
+ // In order to be compatible with the old version of RLZ, the hash of the |
+ // SID must be done with all the original bytes from the unicode string. |
+ // However, the chromebase SHA1 hash function takes only an std::string as |
+ // input, so the unicode string needs to be converted to std::string |
+ // "as is". |
+ size_t byte_count = sid_string.size() * sizeof(string16::value_type); |
+ const char* buffer = reinterpret_cast<const char*>(sid_string.c_str()); |
+ std::string sid_string_buffer(buffer, byte_count); |
+ |
+ // Note that digest can have embedded nulls. |
+ std::string digest(base::SHA1HashString(sid_string_buffer)); |
+ VERIFY(digest.size() == base::kSHA1Length); |
+ std::copy(digest.begin(), digest.end(), id_binary.begin()); |
+ } |
+ |
+ // Convert from int to binary (makes big-endian). |
+ for (size_t i = 0; i < sizeof(int); i++) { |
+ int shift_bits = 8 * (sizeof(int) - i - 1); |
+ id_binary[base::kSHA1Length + i] = static_cast<unsigned char>( |
+ (volume_id >> shift_bits) & 0xFF); |
+ } |
+ |
+ // Append the checksum byte. |
+ if (!sid_string.empty() || (0 != volume_id)) |
+ rlz_lib::Crc8::Generate(id_binary.c_str(), |
+ kSizeWithoutChecksum, |
+ &id_binary[kSizeWithoutChecksum]); |
+ |
+ return rlz_lib::BytesToString( |
+ id_binary.c_str(), kSizeWithoutChecksum + 1, machine_id); |
+} |
+ |
+} // namespace testing |
+ |
+} // namespace rlz_lib |