/* ============================================================================== This file is part of the JUCE library. Copyright (c) 2017 - ROLI Ltd. JUCE is an open source library subject to commercial or open-source licensing. By using JUCE, you agree to the terms of both the JUCE 5 End-User License Agreement and JUCE 5 Privacy Policy (both updated and effective as of the 27th April 2017). End User License Agreement: www.juce.com/juce-5-licence Privacy Policy: www.juce.com/juce-5-privacy-policy Or: You may also use this code under the terms of the GPL v3 (see www.gnu.org/licenses). JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE DISCLAIMED. ============================================================================== */ namespace juce { class SHA256Processor { public: SHA256Processor() noexcept : length (0) { state[0] = 0x6a09e667; state[1] = 0xbb67ae85; state[2] = 0x3c6ef372; state[3] = 0xa54ff53a; state[4] = 0x510e527f; state[5] = 0x9b05688c; state[6] = 0x1f83d9ab; state[7] = 0x5be0cd19; } // expects 64 bytes of data void processFullBlock (const void* const data) noexcept { const uint32 constants[] = { 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 }; uint32 block[16], s[8]; memcpy (s, state, sizeof (s)); for (int i = 0; i < 16; ++i) block[i] = ByteOrder::bigEndianInt (addBytesToPointer (data, i * 4)); for (uint32 j = 0; j < 64; j += 16) { #define JUCE_SHA256(i) \ s[(7 - i) & 7] += S1 (s[(4 - i) & 7]) + ch (s[(4 - i) & 7], s[(5 - i) & 7], s[(6 - i) & 7]) + constants[i + j] \ + (j != 0 ? (block[i & 15] += s1 (block[(i - 2) & 15]) + block[(i - 7) & 15] + s0 (block[(i - 15) & 15])) \ : block[i]); \ s[(3 - i) & 7] += s[(7 - i) & 7]; \ s[(7 - i) & 7] += S0 (s[(0 - i) & 7]) + maj (s[(0 - i) & 7], s[(1 - i) & 7], s[(2 - i) & 7]) JUCE_SHA256(0); JUCE_SHA256(1); JUCE_SHA256(2); JUCE_SHA256(3); JUCE_SHA256(4); JUCE_SHA256(5); JUCE_SHA256(6); JUCE_SHA256(7); JUCE_SHA256(8); JUCE_SHA256(9); JUCE_SHA256(10); JUCE_SHA256(11); JUCE_SHA256(12); JUCE_SHA256(13); JUCE_SHA256(14); JUCE_SHA256(15); #undef JUCE_SHA256 } for (int i = 0; i < 8; ++i) state[i] += s[i]; length += 64; } void processFinalBlock (const void* const data, unsigned int numBytes) noexcept { jassert (numBytes < 64); length += numBytes; length *= 8; // (the length is stored as a count of bits, not bytes) uint8 finalBlocks[128]; memcpy (finalBlocks, data, numBytes); finalBlocks [numBytes++] = 128; // append a '1' bit while (numBytes != 56 && numBytes < 64 + 56) finalBlocks [numBytes++] = 0; // pad with zeros.. for (int i = 8; --i >= 0;) finalBlocks [numBytes++] = (uint8) (length >> (i * 8)); // append the length. jassert (numBytes == 64 || numBytes == 128); processFullBlock (finalBlocks); if (numBytes > 64) processFullBlock (finalBlocks + 64); } void copyResult (uint8* result) const noexcept { for (int i = 0; i < 8; ++i) { *result++ = (uint8) (state[i] >> 24); *result++ = (uint8) (state[i] >> 16); *result++ = (uint8) (state[i] >> 8); *result++ = (uint8) state[i]; } } void processStream (InputStream& input, int64 numBytesToRead, uint8* const result) { if (numBytesToRead < 0) numBytesToRead = std::numeric_limits::max(); for (;;) { uint8 buffer [64]; const int bytesRead = input.read (buffer, (int) jmin (numBytesToRead, (int64) sizeof (buffer))); if (bytesRead < (int) sizeof (buffer)) { processFinalBlock (buffer, (unsigned int) bytesRead); break; } numBytesToRead -= sizeof (buffer); processFullBlock (buffer); } copyResult (result); } private: uint32 state[8]; uint64 length; static inline uint32 rotate (const uint32 x, const uint32 y) noexcept { return (x >> y) | (x << (32 - y)); } static inline uint32 ch (const uint32 x, const uint32 y, const uint32 z) noexcept { return z ^ ((y ^ z) & x); } static inline uint32 maj (const uint32 x, const uint32 y, const uint32 z) noexcept { return y ^ ((y ^ z) & (x ^ y)); } static inline uint32 s0 (const uint32 x) noexcept { return rotate (x, 7) ^ rotate (x, 18) ^ (x >> 3); } static inline uint32 s1 (const uint32 x) noexcept { return rotate (x, 17) ^ rotate (x, 19) ^ (x >> 10); } static inline uint32 S0 (const uint32 x) noexcept { return rotate (x, 2) ^ rotate (x, 13) ^ rotate (x, 22); } static inline uint32 S1 (const uint32 x) noexcept { return rotate (x, 6) ^ rotate (x, 11) ^ rotate (x, 25); } JUCE_DECLARE_NON_COPYABLE (SHA256Processor) }; //============================================================================== SHA256::SHA256() noexcept { zerostruct (result); } SHA256::~SHA256() noexcept {} SHA256::SHA256 (const SHA256& other) noexcept { memcpy (result, other.result, sizeof (result)); } SHA256& SHA256::operator= (const SHA256& other) noexcept { memcpy (result, other.result, sizeof (result)); return *this; } SHA256::SHA256 (const MemoryBlock& data) { process (data.getData(), data.getSize()); } SHA256::SHA256 (const void* const data, const size_t numBytes) { process (data, numBytes); } SHA256::SHA256 (InputStream& input, const int64 numBytesToRead) { SHA256Processor processor; processor.processStream (input, numBytesToRead, result); } SHA256::SHA256 (const File& file) { FileInputStream fin (file); if (fin.getStatus().wasOk()) { SHA256Processor processor; processor.processStream (fin, -1, result); } else { zerostruct (result); } } SHA256::SHA256 (CharPointer_UTF8 utf8) noexcept { jassert (utf8.getAddress() != nullptr); process (utf8.getAddress(), utf8.sizeInBytes() - 1); } void SHA256::process (const void* const data, size_t numBytes) { MemoryInputStream m (data, numBytes, false); SHA256Processor processor; processor.processStream (m, -1, result); } MemoryBlock SHA256::getRawData() const { return MemoryBlock (result, sizeof (result)); } String SHA256::toHexString() const { return String::toHexString (result, sizeof (result), 0); } bool SHA256::operator== (const SHA256& other) const noexcept { return memcmp (result, other.result, sizeof (result)) == 0; } bool SHA256::operator!= (const SHA256& other) const noexcept { return ! operator== (other); } //============================================================================== #if JUCE_UNIT_TESTS class SHA256Tests : public UnitTest { public: SHA256Tests() : UnitTest ("SHA-256", "Cryptography") {} void test (const char* input, const char* expected) { { SHA256 hash (input, strlen (input)); expectEquals (hash.toHexString(), String (expected)); } { CharPointer_UTF8 utf8 (input); SHA256 hash (utf8); expectEquals (hash.toHexString(), String (expected)); } { MemoryInputStream m (input, strlen (input), false); SHA256 hash (m); expectEquals (hash.toHexString(), String (expected)); } } void runTest() override { beginTest ("SHA256"); test ("", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"); test ("The quick brown fox jumps over the lazy dog", "d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592"); test ("The quick brown fox jumps over the lazy dog.", "ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c"); } }; static SHA256Tests sha256UnitTests; #endif } // namespace juce