diff --git a/mindspore/ccsrc/utils/system/sha256.h b/mindspore/ccsrc/utils/system/sha256.h index 8011bf5f5f..e5af54b8a6 100644 --- a/mindspore/ccsrc/utils/system/sha256.h +++ b/mindspore/ccsrc/utils/system/sha256.h @@ -24,7 +24,6 @@ namespace mindspore { namespace system { namespace sha256 { -constexpr int kPathMax = 4096; constexpr int kBitNumber = 8; constexpr int kDigestSize = 8; constexpr int kIterationNumber = 64; @@ -47,13 +46,13 @@ inline uint32_t sigma2(uint32_t x) { return (x >> 7 | x << 25) ^ (x >> 18 | x << inline uint32_t sigma3(uint32_t x) { return (x >> 17 | x << 15) ^ (x >> 19 | x << 13) ^ (x >> 10); } std::string LoadFilePath(const std::string &path) { - char real_path[kPathMax] = {0}; + char real_path[PATH_MAX] = {0}; #if defined(_WIN32) || defined(_WIN64) - if (path.size() > kPathMax || _fullpath(real_path, path.c_str(), kPathMax) == nullptr) { + if (path.size() > PATH_MAX || _fullpath(real_path, path.c_str(), PATH_MAX) == nullptr) { return ""; } #else - if (path.size() > kPathMax || realpath(path.c_str(), real_path) == nullptr) { + if (path.size() > PATH_MAX || realpath(path.c_str(), real_path) == nullptr) { return ""; } #endif @@ -65,44 +64,50 @@ std::string LoadFilePath(const std::string &path) { return message; } -void Padding(std::string *message) { +bool Padding(std::string *message) { uint64_t bits_message = message->size() * kBitNumber; - int remains = message->size() % kMessageBlockLength; + const int remains = message->size() % kMessageBlockLength; // The length of the message needs to be stored in 8 bytes, supplemented at the end of the message. - int size_append = 8; - int size_required = kMessageBlockLength - size_append; - int size_pad = size_required - remains + (remains < size_required ? 0 : kMessageBlockLength); + const int size_append = 8; + const int size_required = kMessageBlockLength - size_append; + const int size_pad = size_required - remains + (size_required > remains ? 0 : kMessageBlockLength); + if (size_pad < 1 || size_pad > kMessageBlockLength) { + return false; + } message->push_back(0x80); for (int i = 1; i < size_pad; ++i) { message->push_back(0x00); } for (int i = size_append - 1; i >= 0; --i) { - message->push_back(static_cast((bits_message >> (i * kBitNumber)) & 0xff)); + message->push_back(static_cast((bits_message >> static_cast(i * kBitNumber)) & 0xff)); } + return true; } -void ProcessInner(const std::string &message, uint32_t *digest, const int bias) { +bool ProcessInner(const std::string &message, const int &bias, uint32_t *digest, const int &digest_size) { + if (digest_size != 8) { // The number of digests is fixed at 8 + return false; + } uint32_t w[kIterationNumber] = {0}; for (int i = 0; i < 16; ++i) { - w[i] = (static_cast(message[bias + i * 4] & 0xff) << 24) | - (static_cast(message[bias + i * 4 + 1] & 0xff) << 16) | - (static_cast(message[bias + i * 4 + 2] & 0xff) << 8) | - (static_cast(message[bias + i * 4 + 3] & 0xff)); + w[i] = (static_cast(static_cast(message[bias + i * 4]) & 0xff) << 24) | + (static_cast(static_cast(message[bias + i * 4 + 1]) & 0xff) << 16) | + (static_cast(static_cast(message[bias + i * 4 + 2]) & 0xff) << 8) | + (static_cast(static_cast(message[bias + i * 4 + 3]) & 0xff)); } for (int i = 16; i < kIterationNumber; ++i) { w[i] = sigma3(w[i - 2]) + w[i - 7] + sigma2(w[i - 15]) + w[i - 16]; } - uint32_t hash[kDigestSize]; - for (int i = 0; i < kDigestSize; ++i) { - hash[i] = digest[i]; + uint32_t *hash = new uint32_t[digest_size]; + auto ret = memcpy_s(hash, digest_size * sizeof(uint32_t), digest, digest_size * sizeof(uint32_t)); + if (ret != 0) { + return false; } for (int i = 0; i < kIterationNumber; ++i) { - uint32_t t1 = w[i] + constant[i] + hash[kDigestSize - 1] + sigma1(hash[kDigestSize - 4]) + - ch(hash[kDigestSize - 4], hash[kDigestSize - 3], hash[kDigestSize - 2]); - uint32_t t2 = - sigma0(hash[kDigestSize - 8]) + ma(hash[kDigestSize - 8], hash[kDigestSize - 7], hash[kDigestSize - 6]); - for (int j = kDigestSize - 1; j >= 0; --j) { + uint32_t t1 = w[i] + constant[i] + hash[7] + sigma1(hash[4]) + ch(hash[4], hash[5], hash[6]); + uint32_t t2 = sigma0(hash[0]) + ma(hash[0], hash[1], hash[2]); + for (int j = digest_size - 1; j >= 0; --j) { if (j == 4) { hash[j] = hash[j - 1] + t1; } else if (j == 0) { @@ -112,17 +117,19 @@ void ProcessInner(const std::string &message, uint32_t *digest, const int bias) } } } - for (int i = 0; i < kDigestSize; ++i) { + for (int i = 0; i < digest_size; ++i) { digest[i] += hash[i]; } + delete[](hash); + return true; } -std::string ConvertToString(uint32_t *input) { +std::string ConvertToString(uint32_t *input, const int &size) { std::ostringstream oss; oss << std::hex; - for (int i = 0; i < kDigestSize; ++i) { + for (int i = 0; i < size; ++i) { for (int j = static_cast(sizeof(uint32_t) / sizeof(uint8_t)) - 1; j >= 0; --j) { - uint8_t val = static_cast((input[i] >> (j * kBitNumber)) & 0xff); + uint8_t val = static_cast((input[i] >> static_cast(j * kBitNumber)) & 0xff); oss << std::setw(2) << std::setfill('0') << static_cast(val); } } @@ -133,26 +140,26 @@ std::string Encrypt(const std::string &message) { uint32_t digest[kDigestSize] = {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19}; for (int i = 0; i < static_cast(message.size()); i += kMessageBlockLength) { - ProcessInner(message, digest, i); + if (!ProcessInner(message, i, digest, kDigestSize)) { + return ""; + } } - return ConvertToString(digest); + return ConvertToString(digest, kDigestSize); } std::string GetHashFromString(const std::string &data) { - if (data.empty()) { + std::string message = data; + if (message.empty() || !Padding(&message)) { return ""; } - std::string message = data; - Padding(&message); return Encrypt(message); } std::string GetHashFromFile(const std::string &path) { std::string message = LoadFilePath(path); - if (message.empty()) { + if (message.empty() || !Padding(&message)) { return ""; } - Padding(&message); return Encrypt(message); } } // namespace sha256