diff options
Diffstat (limited to 'Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc')
-rw-r--r-- | Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc | 1781 |
1 files changed, 0 insertions, 1781 deletions
diff --git a/Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc b/Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc deleted file mode 100644 index 9577b655234..00000000000 --- a/Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc +++ /dev/null @@ -1,1781 +0,0 @@ -//======================================================================== -// -// Decrypt.cc -// -// Copyright 1996-2003 Glyph & Cog, LLC -// -//======================================================================== - -//======================================================================== -// -// Modified under the Poppler project - http://poppler.freedesktop.org -// -// All changes made under the Poppler project to this file are licensed -// under GPL version 2 or later -// -// Copyright (C) 2008 Julien Rebetez <julien@fhtagn.net> -// Copyright (C) 2008, 2010, 2016-2018 Albert Astals Cid <aacid@kde.org> -// Copyright (C) 2009 Matthias Franz <matthias@ktug.or.kr> -// Copyright (C) 2009 David Benjamin <davidben@mit.edu> -// Copyright (C) 2012 Fabio D'Urso <fabiodurso@hotmail.it> -// Copyright (C) 2013, 2017 Adrian Johnson <ajohnson@redneon.com> -// Copyright (C) 2016 Alok Anand <alok4nand@gmail.com> -// Copyright (C) 2016 Thomas Freitag <Thomas.Freitag@alfa.de> -// -// To see a description of the changes please see the Changelog file that -// came with your tarball or type make ChangeLog if you are building from git -// -//======================================================================== - -#include <config.h> - -#ifdef USE_GCC_PRAGMAS -#pragma implementation -#endif - -#include <cstdint> -#include <string.h> -#include "goo/gmem.h" -#include "goo/grandom.h" -#include "Decrypt.h" -#include "Error.h" - -static void rc4InitKey(Guchar *key, int keyLen, Guchar *state); -static Guchar rc4DecryptByte(Guchar *state, Guchar *x, Guchar *y, Guchar c); - -static GBool aesReadBlock(Stream *str, Guchar *in, GBool addPadding); - -static void aesKeyExpansion(DecryptAESState *s, Guchar *objKey, int objKeyLen, GBool decrypt); -static void aesEncryptBlock(DecryptAESState *s, Guchar *in); -static void aesDecryptBlock(DecryptAESState *s, Guchar *in, GBool last); - -static void aes256KeyExpansion(DecryptAES256State *s, Guchar *objKey, int objKeyLen, GBool decrypt); -static void aes256EncryptBlock(DecryptAES256State *s, Guchar *in); -static void aes256DecryptBlock(DecryptAES256State *s, Guchar *in, GBool last); - -static void sha256(Guchar *msg, int msgLen, Guchar *hash); -static void sha384(Guchar *msg, int msgLen, Guchar *hash); -static void sha512(Guchar *msg, int msgLen, Guchar *hash); - -static void revision6Hash(GooString *inputPassword, Guchar *K, char *userKey); - -static const Guchar passwordPad[32] = { - 0x28, 0xbf, 0x4e, 0x5e, 0x4e, 0x75, 0x8a, 0x41, - 0x64, 0x00, 0x4e, 0x56, 0xff, 0xfa, 0x01, 0x08, - 0x2e, 0x2e, 0x00, 0xb6, 0xd0, 0x68, 0x3e, 0x80, - 0x2f, 0x0c, 0xa9, 0xfe, 0x64, 0x53, 0x69, 0x7a -}; - -//------------------------------------------------------------------------ -// Decrypt -//------------------------------------------------------------------------ - -GBool Decrypt::makeFileKey(int encVersion, int encRevision, int keyLength, - GooString *ownerKey, GooString *userKey, - GooString *ownerEnc, GooString *userEnc, - int permissions, GooString *fileID, - GooString *ownerPassword, GooString *userPassword, - Guchar *fileKey, GBool encryptMetadata, - GBool *ownerPasswordOk) { - DecryptAES256State state; - Guchar test[127 + 56], test2[32]; - GooString *userPassword2; - Guchar fState[256]; - Guchar tmpKey[16]; - Guchar fx, fy; - int len, i, j; - - *ownerPasswordOk = gFalse; - - if (encRevision == 5 || encRevision == 6) { - - // check the owner password - if (ownerPassword) { - //~ this is supposed to convert the password to UTF-8 using "SASLprep" - len = ownerPassword->getLength(); - if (len > 127) { - len = 127; - } - memcpy(test, ownerPassword->getCString(), len); - memcpy(test + len, ownerKey->getCString() + 32, 8); - memcpy(test + len + 8, userKey->getCString(), 48); - sha256(test, len + 56, test); - if (encRevision == 6) { - //test contains the initial SHA-256 hash as input K. - revision6Hash(ownerPassword, test, userKey->getCString()); - } - if (!memcmp(test, ownerKey->getCString(), 32)) { - - // compute the file key from the owner password - memcpy(test, ownerPassword->getCString(), len); - memcpy(test + len, ownerKey->getCString() + 40, 8); - memcpy(test + len + 8, userKey->getCString(), 48); - sha256(test, len + 56, test); - if (encRevision == 6) { - //test contains the initial SHA-256 hash input K. - revision6Hash(ownerPassword, test, userKey->getCString()); - } - aes256KeyExpansion(&state, test, 32, gTrue); - for (i = 0; i < 16; ++i) { - state.cbc[i] = 0; - } - aes256DecryptBlock(&state, (Guchar *)ownerEnc->getCString(), gFalse); - memcpy(fileKey, state.buf, 16); - aes256DecryptBlock(&state, (Guchar *)ownerEnc->getCString() + 16, - gFalse); - memcpy(fileKey + 16, state.buf, 16); - - *ownerPasswordOk = gTrue; - return gTrue; - } - } - - // check the user password - if (userPassword) { - //~ this is supposed to convert the password to UTF-8 using "SASLprep" - len = userPassword->getLength(); - if (len > 127) { - len = 127; - } - memcpy(test, userPassword->getCString(), len); - memcpy(test + len, userKey->getCString() + 32, 8); - sha256(test, len + 8, test); - if(encRevision == 6) { - // test contains the initial SHA-256 hash input K. - // user key is not used in checking user password. - revision6Hash(userPassword, test, nullptr); - } - if (!memcmp(test, userKey->getCString(), 32)) { - - // compute the file key from the user password - memcpy(test, userPassword->getCString(), len); - memcpy(test + len, userKey->getCString() + 40, 8); - sha256(test, len + 8, test); - if(encRevision == 6) { - //test contains the initial SHA-256 hash input K. - //user key is not used in computing intermediate user key. - revision6Hash(userPassword, test, nullptr); - } - aes256KeyExpansion(&state, test, 32, gTrue); - for (i = 0; i < 16; ++i) { - state.cbc[i] = 0; - } - aes256DecryptBlock(&state, (Guchar *)userEnc->getCString(), gFalse); - memcpy(fileKey, state.buf, 16); - aes256DecryptBlock(&state, (Guchar *)userEnc->getCString() + 16, - gFalse); - memcpy(fileKey + 16, state.buf, 16); - - return gTrue; - } - } - - return gFalse; - } else { - - // try using the supplied owner password to generate the user password - if (ownerPassword) { - len = ownerPassword->getLength(); - if (len < 32) { - memcpy(test, ownerPassword->getCString(), len); - memcpy(test + len, passwordPad, 32 - len); - } else { - memcpy(test, ownerPassword->getCString(), 32); - } - md5(test, 32, test); - if (encRevision == 3) { - for (i = 0; i < 50; ++i) { - md5(test, keyLength, test); - } - } - if (encRevision == 2) { - rc4InitKey(test, keyLength, fState); - fx = fy = 0; - for (i = 0; i < 32; ++i) { - test2[i] = rc4DecryptByte(fState, &fx, &fy, ownerKey->getChar(i)); - } - } else { - memcpy(test2, ownerKey->getCString(), 32); - for (i = 19; i >= 0; --i) { - for (j = 0; j < keyLength; ++j) { - tmpKey[j] = test[j] ^ i; - } - rc4InitKey(tmpKey, keyLength, fState); - fx = fy = 0; - for (j = 0; j < 32; ++j) { - test2[j] = rc4DecryptByte(fState, &fx, &fy, test2[j]); - } - } - } - userPassword2 = new GooString((char *)test2, 32); - if (makeFileKey2(encVersion, encRevision, keyLength, ownerKey, userKey, - permissions, fileID, userPassword2, fileKey, - encryptMetadata)) { - *ownerPasswordOk = gTrue; - delete userPassword2; - return gTrue; - } - delete userPassword2; - } - - // try using the supplied user password - return makeFileKey2(encVersion, encRevision, keyLength, ownerKey, userKey, - permissions, fileID, userPassword, fileKey, - encryptMetadata); - } -} - -GBool Decrypt::makeFileKey2(int encVersion, int encRevision, int keyLength, - GooString *ownerKey, GooString *userKey, - int permissions, GooString *fileID, - GooString *userPassword, Guchar *fileKey, - GBool encryptMetadata) { - Guchar *buf; - Guchar test[32]; - Guchar fState[256]; - Guchar tmpKey[16]; - Guchar fx, fy; - int len, i, j; - GBool ok; - - // generate file key - buf = (Guchar *)gmalloc(72 + fileID->getLength()); - if (userPassword) { - len = userPassword->getLength(); - if (len < 32) { - memcpy(buf, userPassword->getCString(), len); - memcpy(buf + len, passwordPad, 32 - len); - } else { - memcpy(buf, userPassword->getCString(), 32); - } - } else { - memcpy(buf, passwordPad, 32); - } - memcpy(buf + 32, ownerKey->getCString(), 32); - buf[64] = permissions & 0xff; - buf[65] = (permissions >> 8) & 0xff; - buf[66] = (permissions >> 16) & 0xff; - buf[67] = (permissions >> 24) & 0xff; - memcpy(buf + 68, fileID->getCString(), fileID->getLength()); - len = 68 + fileID->getLength(); - if (!encryptMetadata) { - buf[len++] = 0xff; - buf[len++] = 0xff; - buf[len++] = 0xff; - buf[len++] = 0xff; - } - md5(buf, len, fileKey); - if (encRevision == 3) { - for (i = 0; i < 50; ++i) { - md5(fileKey, keyLength, fileKey); - } - } - - // test user password - if (encRevision == 2) { - rc4InitKey(fileKey, keyLength, fState); - fx = fy = 0; - for (i = 0; i < 32; ++i) { - test[i] = rc4DecryptByte(fState, &fx, &fy, userKey->getChar(i)); - } - ok = memcmp(test, passwordPad, 32) == 0; - } else if (encRevision == 3) { - memcpy(test, userKey->getCString(), 32); - for (i = 19; i >= 0; --i) { - for (j = 0; j < keyLength; ++j) { - tmpKey[j] = fileKey[j] ^ i; - } - rc4InitKey(tmpKey, keyLength, fState); - fx = fy = 0; - for (j = 0; j < 32; ++j) { - test[j] = rc4DecryptByte(fState, &fx, &fy, test[j]); - } - } - memcpy(buf, passwordPad, 32); - memcpy(buf + 32, fileID->getCString(), fileID->getLength()); - md5(buf, 32 + fileID->getLength(), buf); - ok = memcmp(test, buf, 16) == 0; - } else { - ok = gFalse; - } - - gfree(buf); - return ok; -} - -//------------------------------------------------------------------------ -// BaseCryptStream -//------------------------------------------------------------------------ - -BaseCryptStream::BaseCryptStream(Stream *strA, Guchar *fileKey, CryptAlgorithm algoA, - int keyLength, int objNum, int objGen): - FilterStream(strA) -{ - algo = algoA; - - // construct object key - for (int i = 0; i < keyLength; ++i) { - objKey[i] = fileKey[i]; - } - for (std::size_t i = keyLength; i < sizeof(objKey); ++i) { - objKey[i] = 0; - } - - switch (algo) { - case cryptRC4: - if (likely(keyLength < static_cast<int>(sizeof(objKey) - 4))) { - objKey[keyLength] = objNum & 0xff; - objKey[keyLength + 1] = (objNum >> 8) & 0xff; - objKey[keyLength + 2] = (objNum >> 16) & 0xff; - objKey[keyLength + 3] = objGen & 0xff; - objKey[keyLength + 4] = (objGen >> 8) & 0xff; - md5(objKey, keyLength + 5, objKey); - } - if ((objKeyLength = keyLength + 5) > 16) { - objKeyLength = 16; - } - break; - case cryptAES: - objKey[keyLength] = objNum & 0xff; - objKey[keyLength + 1] = (objNum >> 8) & 0xff; - objKey[keyLength + 2] = (objNum >> 16) & 0xff; - objKey[keyLength + 3] = objGen & 0xff; - objKey[keyLength + 4] = (objGen >> 8) & 0xff; - objKey[keyLength + 5] = 0x73; // 's' - objKey[keyLength + 6] = 0x41; // 'A' - objKey[keyLength + 7] = 0x6c; // 'l' - objKey[keyLength + 8] = 0x54; // 'T' - md5(objKey, keyLength + 9, objKey); - if ((objKeyLength = keyLength + 5) > 16) { - objKeyLength = 16; - } - break; - case cryptAES256: - objKeyLength = keyLength; - break; - case cryptNone: - break; - } - - charactersRead = 0; - autoDelete = gTrue; -} - -BaseCryptStream::~BaseCryptStream() { - if (autoDelete) { - delete str; - } -} - -void BaseCryptStream::reset() { - charactersRead = 0; - nextCharBuff = EOF; - str->reset(); -} - -Goffset BaseCryptStream::getPos() { - return charactersRead; -} - -int BaseCryptStream::getChar() { - // Read next character and empty the buffer, so that a new character will be read next time - int c = lookChar(); - nextCharBuff = EOF; - - if (c != EOF) - charactersRead++; - return c; -} - -GBool BaseCryptStream::isBinary(GBool last) { - return str->isBinary(last); -} - -void BaseCryptStream::setAutoDelete(GBool val) { - autoDelete = val; -} - -//------------------------------------------------------------------------ -// EncryptStream -//------------------------------------------------------------------------ - -EncryptStream::EncryptStream(Stream *strA, Guchar *fileKey, CryptAlgorithm algoA, - int keyLength, int objNum, int objGen): - BaseCryptStream(strA, fileKey, algoA, keyLength, objNum, objGen) -{ - // Fill the CBC initialization vector for AES and AES-256 - switch (algo) { - case cryptAES: - grandom_fill(state.aes.cbc, 16); - break; - case cryptAES256: - grandom_fill(state.aes256.cbc, 16); - break; - default: - break; - } -} - -EncryptStream::~EncryptStream() { -} - -void EncryptStream::reset() { - BaseCryptStream::reset(); - - switch (algo) { - case cryptRC4: - state.rc4.x = state.rc4.y = 0; - rc4InitKey(objKey, objKeyLength, state.rc4.state); - break; - case cryptAES: - aesKeyExpansion(&state.aes, objKey, objKeyLength, gFalse); - memcpy(state.aes.buf, state.aes.cbc, 16); // Copy CBC IV to buf - state.aes.bufIdx = 0; - state.aes.paddingReached = gFalse; - break; - case cryptAES256: - aes256KeyExpansion(&state.aes256, objKey, objKeyLength, gFalse); - memcpy(state.aes256.buf, state.aes256.cbc, 16); // Copy CBC IV to buf - state.aes256.bufIdx = 0; - state.aes256.paddingReached = gFalse; - break; - case cryptNone: - break; - } -} - -int EncryptStream::lookChar() { - Guchar in[16]; - int c; - - if (nextCharBuff != EOF) - return nextCharBuff; - - c = EOF; // make gcc happy - switch (algo) { - case cryptRC4: - if ((c = str->getChar()) != EOF) { - // RC4 is XOR-based: the decryption algorithm works for encryption too - c = rc4DecryptByte(state.rc4.state, &state.rc4.x, &state.rc4.y, (Guchar)c); - } - break; - case cryptAES: - if (state.aes.bufIdx == 16 && !state.aes.paddingReached) { - state.aes.paddingReached = !aesReadBlock(str, in, gTrue); - aesEncryptBlock(&state.aes, in); - } - if (state.aes.bufIdx == 16) { - c = EOF; - } else { - c = state.aes.buf[state.aes.bufIdx++]; - } - break; - case cryptAES256: - if (state.aes256.bufIdx == 16 && !state.aes256.paddingReached) { - state.aes256.paddingReached = !aesReadBlock(str, in, gTrue); - aes256EncryptBlock(&state.aes256, in); - } - if (state.aes256.bufIdx == 16) { - c = EOF; - } else { - c = state.aes256.buf[state.aes256.bufIdx++]; - } - break; - case cryptNone: - break; - } - return (nextCharBuff = c); -} - -//------------------------------------------------------------------------ -// DecryptStream -//------------------------------------------------------------------------ - -DecryptStream::DecryptStream(Stream *strA, Guchar *fileKey, CryptAlgorithm algoA, - int keyLength, int objNum, int objGen): - BaseCryptStream(strA, fileKey, algoA, keyLength, objNum, objGen) -{ -} - -DecryptStream::~DecryptStream() { -} - -void DecryptStream::reset() { - int i; - BaseCryptStream::reset(); - - switch (algo) { - case cryptRC4: - state.rc4.x = state.rc4.y = 0; - rc4InitKey(objKey, objKeyLength, state.rc4.state); - break; - case cryptAES: - aesKeyExpansion(&state.aes, objKey, objKeyLength, gTrue); - for (i = 0; i < 16; ++i) { - state.aes.cbc[i] = str->getChar(); - } - state.aes.bufIdx = 16; - break; - case cryptAES256: - aes256KeyExpansion(&state.aes256, objKey, objKeyLength, gTrue); - for (i = 0; i < 16; ++i) { - state.aes256.cbc[i] = str->getChar(); - } - state.aes256.bufIdx = 16; - break; - case cryptNone: - break; - } -} - -int DecryptStream::lookChar() { - Guchar in[16]; - int c; - - if (nextCharBuff != EOF) - return nextCharBuff; - - c = EOF; // make gcc happy - switch (algo) { - case cryptRC4: - if ((c = str->getChar()) != EOF) { - c = rc4DecryptByte(state.rc4.state, &state.rc4.x, &state.rc4.y, (Guchar)c); - } - break; - case cryptAES: - if (state.aes.bufIdx == 16) { - if (aesReadBlock(str, in, gFalse)) { - aesDecryptBlock(&state.aes, in, str->lookChar() == EOF); - } - } - if (state.aes.bufIdx == 16) { - c = EOF; - } else { - c = state.aes.buf[state.aes.bufIdx++]; - } - break; - case cryptAES256: - if (state.aes256.bufIdx == 16) { - if (aesReadBlock(str, in, gFalse)) { - aes256DecryptBlock(&state.aes256, in, str->lookChar() == EOF); - } - } - if (state.aes256.bufIdx == 16) { - c = EOF; - } else { - c = state.aes256.buf[state.aes256.bufIdx++]; - } - break; - case cryptNone: - break; - } - return (nextCharBuff = c); -} - -//------------------------------------------------------------------------ -// RC4-compatible decryption -//------------------------------------------------------------------------ - -static void rc4InitKey(Guchar *key, int keyLen, Guchar *state) { - Guchar index1, index2; - Guchar t; - int i; - - for (i = 0; i < 256; ++i) - state[i] = i; - - if (unlikely(keyLen == 0)) - return; - - index1 = index2 = 0; - for (i = 0; i < 256; ++i) { - index2 = (key[index1] + state[i] + index2) % 256; - t = state[i]; - state[i] = state[index2]; - state[index2] = t; - index1 = (index1 + 1) % keyLen; - } -} - -static Guchar rc4DecryptByte(Guchar *state, Guchar *x, Guchar *y, Guchar c) { - Guchar x1, y1, tx, ty; - - x1 = *x = (*x + 1) % 256; - y1 = *y = (state[*x] + *y) % 256; - tx = state[x1]; - ty = state[y1]; - state[x1] = ty; - state[y1] = tx; - return c ^ state[(tx + ty) % 256]; -} - -//------------------------------------------------------------------------ -// AES decryption -//------------------------------------------------------------------------ - -// Returns gFalse if EOF was reached, gTrue otherwise -static GBool aesReadBlock(Stream *str, Guchar *in, GBool addPadding) -{ - int c, i; - - for (i = 0; i < 16; ++i) { - if ((c = str->getChar()) != EOF) { - in[i] = (Guchar)c; - } else { - break; - } - } - - if (i == 16) { - return gTrue; - } else { - if (addPadding) { - c = 16 - i; - while (i < 16) { - in[i++] = (Guchar)c; - } - } - return gFalse; - } -} - -static const Guchar sbox[256] = { - 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, - 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, - 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, - 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, - 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, - 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, - 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, - 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, - 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, - 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, - 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, - 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, - 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, - 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, - 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, - 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 -}; - -static const Guchar invSbox[256] = { - 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, - 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, - 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, - 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, - 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, - 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, - 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, - 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, - 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, - 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, - 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, - 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, - 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, - 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, - 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, - 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d -}; - -static const Guint rcon[11] = { - 0x00000000, // unused - 0x01000000, - 0x02000000, - 0x04000000, - 0x08000000, - 0x10000000, - 0x20000000, - 0x40000000, - 0x80000000, - 0x1b000000, - 0x36000000 -}; - -static inline Guint subWord(Guint x) { - return (sbox[x >> 24] << 24) - | (sbox[(x >> 16) & 0xff] << 16) - | (sbox[(x >> 8) & 0xff] << 8) - | sbox[x & 0xff]; -} - -static inline Guint rotWord(Guint x) { - return ((x << 8) & 0xffffffff) | (x >> 24); -} - -static inline void subBytes(Guchar *state) { - int i; - - for (i = 0; i < 16; ++i) { - state[i] = sbox[state[i]]; - } -} - -static inline void invSubBytes(Guchar *state) { - int i; - - for (i = 0; i < 16; ++i) { - state[i] = invSbox[state[i]]; - } -} - -static inline void shiftRows(Guchar *state) { - Guchar t; - - t = state[4]; - state[4] = state[5]; - state[5] = state[6]; - state[6] = state[7]; - state[7] = t; - - t = state[8]; - state[8] = state[10]; - state[10] = t; - t = state[9]; - state[9] = state[11]; - state[11] = t; - - t = state[15]; - state[15] = state[14]; - state[14] = state[13]; - state[13] = state[12]; - state[12] = t; -} - -static inline void invShiftRows(Guchar *state) { - Guchar t; - - t = state[7]; - state[7] = state[6]; - state[6] = state[5]; - state[5] = state[4]; - state[4] = t; - - t = state[8]; - state[8] = state[10]; - state[10] = t; - t = state[9]; - state[9] = state[11]; - state[11] = t; - - t = state[12]; - state[12] = state[13]; - state[13] = state[14]; - state[14] = state[15]; - state[15] = t; -} - -// {02} \cdot s -static inline Guchar mul02(Guchar s) { - return (s & 0x80) ? ((s << 1) ^ 0x1b) : (s << 1); -} - -// {03} \cdot s -static inline Guchar mul03(Guchar s) { - Guchar s2 = (s & 0x80) ? ((s << 1) ^ 0x1b) : (s << 1); - return s ^ s2; -} - -// {09} \cdot s -static inline Guchar mul09(Guchar s) { - Guchar s2, s4, s8; - - s2 = (s & 0x80) ? ((s << 1) ^ 0x1b) : (s << 1); - s4 = (s2 & 0x80) ? ((s2 << 1) ^ 0x1b) : (s2 << 1); - s8 = (s4 & 0x80) ? ((s4 << 1) ^ 0x1b) : (s4 << 1); - return s ^ s8; -} - -// {0b} \cdot s -static inline Guchar mul0b(Guchar s) { - Guchar s2, s4, s8; - - s2 = (s & 0x80) ? ((s << 1) ^ 0x1b) : (s << 1); - s4 = (s2 & 0x80) ? ((s2 << 1) ^ 0x1b) : (s2 << 1); - s8 = (s4 & 0x80) ? ((s4 << 1) ^ 0x1b) : (s4 << 1); - return s ^ s2 ^ s8; -} - -// {0d} \cdot s -static inline Guchar mul0d(Guchar s) { - Guchar s2, s4, s8; - - s2 = (s & 0x80) ? ((s << 1) ^ 0x1b) : (s << 1); - s4 = (s2 & 0x80) ? ((s2 << 1) ^ 0x1b) : (s2 << 1); - s8 = (s4 & 0x80) ? ((s4 << 1) ^ 0x1b) : (s4 << 1); - return s ^ s4 ^ s8; -} - -// {0e} \cdot s -static inline Guchar mul0e(Guchar s) { - Guchar s2, s4, s8; - - s2 = (s & 0x80) ? ((s << 1) ^ 0x1b) : (s << 1); - s4 = (s2 & 0x80) ? ((s2 << 1) ^ 0x1b) : (s2 << 1); - s8 = (s4 & 0x80) ? ((s4 << 1) ^ 0x1b) : (s4 << 1); - return s2 ^ s4 ^ s8; -} - -static inline void mixColumns(Guchar *state) { - int c; - Guchar s0, s1, s2, s3; - - for (c = 0; c < 4; ++c) { - s0 = state[c]; - s1 = state[4+c]; - s2 = state[8+c]; - s3 = state[12+c]; - state[c] = mul02(s0) ^ mul03(s1) ^ s2 ^ s3; - state[4+c] = s0 ^ mul02(s1) ^ mul03(s2) ^ s3; - state[8+c] = s0 ^ s1 ^ mul02(s2) ^ mul03(s3); - state[12+c] = mul03(s0) ^ s1 ^ s2 ^ mul02(s3); - } -} - -static inline void invMixColumns(Guchar *state) { - int c; - Guchar s0, s1, s2, s3; - - for (c = 0; c < 4; ++c) { - s0 = state[c]; - s1 = state[4+c]; - s2 = state[8+c]; - s3 = state[12+c]; - state[c] = mul0e(s0) ^ mul0b(s1) ^ mul0d(s2) ^ mul09(s3); - state[4+c] = mul09(s0) ^ mul0e(s1) ^ mul0b(s2) ^ mul0d(s3); - state[8+c] = mul0d(s0) ^ mul09(s1) ^ mul0e(s2) ^ mul0b(s3); - state[12+c] = mul0b(s0) ^ mul0d(s1) ^ mul09(s2) ^ mul0e(s3); - } -} - -static inline void invMixColumnsW(Guint *w) { - int c; - Guchar s0, s1, s2, s3; - - for (c = 0; c < 4; ++c) { - s0 = w[c] >> 24; - s1 = w[c] >> 16; - s2 = w[c] >> 8; - s3 = w[c]; - w[c] = ((mul0e(s0) ^ mul0b(s1) ^ mul0d(s2) ^ mul09(s3)) << 24) - | ((mul09(s0) ^ mul0e(s1) ^ mul0b(s2) ^ mul0d(s3)) << 16) - | ((mul0d(s0) ^ mul09(s1) ^ mul0e(s2) ^ mul0b(s3)) << 8) - | (mul0b(s0) ^ mul0d(s1) ^ mul09(s2) ^ mul0e(s3)); - } -} - -static inline void addRoundKey(Guchar *state, Guint *w) { - int c; - - for (c = 0; c < 4; ++c) { - state[c] ^= w[c] >> 24; - state[4+c] ^= w[c] >> 16; - state[8+c] ^= w[c] >> 8; - state[12+c] ^= w[c]; - } -} - -static void aesKeyExpansion(DecryptAESState *s, - Guchar *objKey, int /*objKeyLen*/, GBool decrypt) { - Guint temp; - int i, round; - - //~ this assumes objKeyLen == 16 - - for (i = 0; i < 4; ++i) { - s->w[i] = (objKey[4*i] << 24) + (objKey[4*i+1] << 16) + - (objKey[4*i+2] << 8) + objKey[4*i+3]; - } - for (i = 4; i < 44; ++i) { - temp = s->w[i-1]; - if (!(i & 3)) { - temp = subWord(rotWord(temp)) ^ rcon[i/4]; - } - s->w[i] = s->w[i-4] ^ temp; - } - - /* In case of decryption, adjust the key schedule for the equivalent inverse cipher */ - if (decrypt) { - for (round = 1; round <= 9; ++round) { - invMixColumnsW(&s->w[round * 4]); - } - } -} - -static void aesEncryptBlock(DecryptAESState *s, Guchar *in) { - int c, round; - - // initial state (input is xor'd with previous output because of CBC) - for (c = 0; c < 4; ++c) { - s->state[c] = in[4*c] ^ s->buf[4*c]; - s->state[4+c] = in[4*c+1] ^ s->buf[4*c+1]; - s->state[8+c] = in[4*c+2] ^ s->buf[4*c+2]; - s->state[12+c] = in[4*c+3] ^ s->buf[4*c+3]; - } - - // round 0 - addRoundKey(s->state, &s->w[0]); - - // rounds 1-9 - for (round = 1; round <= 9; ++round) { - subBytes(s->state); - shiftRows(s->state); - mixColumns(s->state); - addRoundKey(s->state, &s->w[round * 4]); - } - - // round 10 - subBytes(s->state); - shiftRows(s->state); - addRoundKey(s->state, &s->w[10 * 4]); - - for (c = 0; c < 4; ++c) { - s->buf[4*c] = s->state[c]; - s->buf[4*c+1] = s->state[4+c]; - s->buf[4*c+2] = s->state[8+c]; - s->buf[4*c+3] = s->state[12+c]; - } - - s->bufIdx = 0; -} - -static void aesDecryptBlock(DecryptAESState *s, Guchar *in, GBool last) { - int c, round, n, i; - - // initial state - for (c = 0; c < 4; ++c) { - s->state[c] = in[4*c]; - s->state[4+c] = in[4*c+1]; - s->state[8+c] = in[4*c+2]; - s->state[12+c] = in[4*c+3]; - } - - // round 0 - addRoundKey(s->state, &s->w[10 * 4]); - - // rounds 1-9 - for (round = 9; round >= 1; --round) { - invSubBytes(s->state); - invShiftRows(s->state); - invMixColumns(s->state); - addRoundKey(s->state, &s->w[round * 4]); - } - - // round 10 - invSubBytes(s->state); - invShiftRows(s->state); - addRoundKey(s->state, &s->w[0]); - - // CBC - for (c = 0; c < 4; ++c) { - s->buf[4*c] = s->state[c] ^ s->cbc[4*c]; - s->buf[4*c+1] = s->state[4+c] ^ s->cbc[4*c+1]; - s->buf[4*c+2] = s->state[8+c] ^ s->cbc[4*c+2]; - s->buf[4*c+3] = s->state[12+c] ^ s->cbc[4*c+3]; - } - - // save the input block for the next CBC - for (i = 0; i < 16; ++i) { - s->cbc[i] = in[i]; - } - - // remove padding - s->bufIdx = 0; - if (last) { - n = s->buf[15]; - if (n < 1 || n > 16) { // this should never happen - n = 16; - } - for (i = 15; i >= n; --i) { - s->buf[i] = s->buf[i-n]; - } - s->bufIdx = n; - } -} - -//------------------------------------------------------------------------ -// AES-256 decryption -//------------------------------------------------------------------------ - -static void aes256KeyExpansion(DecryptAES256State *s, - Guchar *objKey, int objKeyLen, GBool decrypt) { - Guint temp; - int i, round; - - //~ this assumes objKeyLen == 32 - - for (i = 0; i < 8; ++i) { - s->w[i] = (objKey[4*i] << 24) + (objKey[4*i+1] << 16) + - (objKey[4*i+2] << 8) + objKey[4*i+3]; - } - for (i = 8; i < 60; ++i) { - temp = s->w[i-1]; - if ((i & 7) == 0) { - temp = subWord(rotWord(temp)) ^ rcon[i/8]; - } else if ((i & 7) == 4) { - temp = subWord(temp); - } - s->w[i] = s->w[i-8] ^ temp; - } - - /* In case of decryption, adjust the key schedule for the equivalent inverse cipher */ - if (decrypt) { - for (round = 1; round <= 13; ++round) { - invMixColumnsW(&s->w[round * 4]); - } - } -} - -static void aes256EncryptBlock(DecryptAES256State *s, Guchar *in) { - int c, round; - - // initial state (input is xor'd with previous output because of CBC) - for (c = 0; c < 4; ++c) { - s->state[c] = in[4*c] ^ s->buf[4*c]; - s->state[4+c] = in[4*c+1] ^ s->buf[4*c+1]; - s->state[8+c] = in[4*c+2] ^ s->buf[4*c+2]; - s->state[12+c] = in[4*c+3] ^ s->buf[4*c+3]; - } - - // round 0 - addRoundKey(s->state, &s->w[0]); - - // rounds 1-13 - for (round = 1; round <= 13; ++round) { - subBytes(s->state); - shiftRows(s->state); - mixColumns(s->state); - addRoundKey(s->state, &s->w[round * 4]); - } - - // round 14 - subBytes(s->state); - shiftRows(s->state); - addRoundKey(s->state, &s->w[14 * 4]); - - for (c = 0; c < 4; ++c) { - s->buf[4*c] = s->state[c]; - s->buf[4*c+1] = s->state[4+c]; - s->buf[4*c+2] = s->state[8+c]; - s->buf[4*c+3] = s->state[12+c]; - } - - s->bufIdx = 0; -} - -static void aes256DecryptBlock(DecryptAES256State *s, Guchar *in, GBool last) { - int c, round, n, i; - - // initial state - for (c = 0; c < 4; ++c) { - s->state[c] = in[4*c]; - s->state[4+c] = in[4*c+1]; - s->state[8+c] = in[4*c+2]; - s->state[12+c] = in[4*c+3]; - } - - // round 0 - addRoundKey(s->state, &s->w[14 * 4]); - - // rounds 13-1 - for (round = 13; round >= 1; --round) { - invSubBytes(s->state); - invShiftRows(s->state); - invMixColumns(s->state); - addRoundKey(s->state, &s->w[round * 4]); - } - - // round 14 - invSubBytes(s->state); - invShiftRows(s->state); - addRoundKey(s->state, &s->w[0]); - - // CBC - for (c = 0; c < 4; ++c) { - s->buf[4*c] = s->state[c] ^ s->cbc[4*c]; - s->buf[4*c+1] = s->state[4+c] ^ s->cbc[4*c+1]; - s->buf[4*c+2] = s->state[8+c] ^ s->cbc[4*c+2]; - s->buf[4*c+3] = s->state[12+c] ^ s->cbc[4*c+3]; - } - - // save the input block for the next CBC - for (i = 0; i < 16; ++i) { - s->cbc[i] = in[i]; - } - - // remove padding - s->bufIdx = 0; - if (last) { - n = s->buf[15]; - if (n < 1 || n > 16) { // this should never happen - n = 16; - } - for (i = 15; i >= n; --i) { - s->buf[i] = s->buf[i-n]; - } - s->bufIdx = n; - if (n > 16) - { - error(errSyntaxError, -1, "Reducing bufIdx from {0:d} to 16 to not crash", n); - s->bufIdx = 16; - } - } -} - -//------------------------------------------------------------------------ -// MD5 message digest -//------------------------------------------------------------------------ - -// this works around a bug in older Sun compilers -static inline Gulong rotateLeft(Gulong x, int r) { - x &= 0xffffffff; - return ((x << r) | (x >> (32 - r))) & 0xffffffff; -} - -static inline Gulong md5Round1(Gulong a, Gulong b, Gulong c, Gulong d, - Gulong Xk, Gulong s, Gulong Ti) { - return b + rotateLeft((a + ((b & c) | (~b & d)) + Xk + Ti), s); -} - -static inline Gulong md5Round2(Gulong a, Gulong b, Gulong c, Gulong d, - Gulong Xk, Gulong s, Gulong Ti) { - return b + rotateLeft((a + ((b & d) | (c & ~d)) + Xk + Ti), s); -} - -static inline Gulong md5Round3(Gulong a, Gulong b, Gulong c, Gulong d, - Gulong Xk, Gulong s, Gulong Ti) { - return b + rotateLeft((a + (b ^ c ^ d) + Xk + Ti), s); -} - -static inline Gulong md5Round4(Gulong a, Gulong b, Gulong c, Gulong d, - Gulong Xk, Gulong s, Gulong Ti) { - return b + rotateLeft((a + (c ^ (b | ~d)) + Xk + Ti), s); -} - -void md5(Guchar *msg, int msgLen, Guchar *digest) { - Gulong x[16] = {}; - Gulong a, b, c, d, aa, bb, cc, dd; - int n64; - int i, j, k; - - // sanity check - if (msgLen < 0) { - return; - } - - // compute number of 64-byte blocks - // (length + pad byte (0x80) + 8 bytes for length) - n64 = (msgLen + 1 + 8 + 63) / 64; - - // initialize a, b, c, d - a = 0x67452301; - b = 0xefcdab89; - c = 0x98badcfe; - d = 0x10325476; - - // loop through blocks - k = 0; - for (i = 0; i < n64; ++i) { - - // grab a 64-byte block - for (j = 0; j < 16 && k < msgLen - 3; ++j, k += 4) - x[j] = (((((msg[k+3] << 8) + msg[k+2]) << 8) + msg[k+1]) << 8) + msg[k]; - if (i == n64 - 1) { - if (k == msgLen - 3) - x[j] = 0x80000000 + (((msg[k+2] << 8) + msg[k+1]) << 8) + msg[k]; - else if (k == msgLen - 2) - x[j] = 0x800000 + (msg[k+1] << 8) + msg[k]; - else if (k == msgLen - 1) - x[j] = 0x8000 + msg[k]; - else - x[j] = 0x80; - ++j; - while (j < 16) - x[j++] = 0; - x[14] = msgLen << 3; - } - - // save a, b, c, d - aa = a; - bb = b; - cc = c; - dd = d; - - // round 1 - a = md5Round1(a, b, c, d, x[0], 7, 0xd76aa478); - d = md5Round1(d, a, b, c, x[1], 12, 0xe8c7b756); - c = md5Round1(c, d, a, b, x[2], 17, 0x242070db); - b = md5Round1(b, c, d, a, x[3], 22, 0xc1bdceee); - a = md5Round1(a, b, c, d, x[4], 7, 0xf57c0faf); - d = md5Round1(d, a, b, c, x[5], 12, 0x4787c62a); - c = md5Round1(c, d, a, b, x[6], 17, 0xa8304613); - b = md5Round1(b, c, d, a, x[7], 22, 0xfd469501); - a = md5Round1(a, b, c, d, x[8], 7, 0x698098d8); - d = md5Round1(d, a, b, c, x[9], 12, 0x8b44f7af); - c = md5Round1(c, d, a, b, x[10], 17, 0xffff5bb1); - b = md5Round1(b, c, d, a, x[11], 22, 0x895cd7be); - a = md5Round1(a, b, c, d, x[12], 7, 0x6b901122); - d = md5Round1(d, a, b, c, x[13], 12, 0xfd987193); - c = md5Round1(c, d, a, b, x[14], 17, 0xa679438e); - b = md5Round1(b, c, d, a, x[15], 22, 0x49b40821); - - // round 2 - a = md5Round2(a, b, c, d, x[1], 5, 0xf61e2562); - d = md5Round2(d, a, b, c, x[6], 9, 0xc040b340); - c = md5Round2(c, d, a, b, x[11], 14, 0x265e5a51); - b = md5Round2(b, c, d, a, x[0], 20, 0xe9b6c7aa); - a = md5Round2(a, b, c, d, x[5], 5, 0xd62f105d); - d = md5Round2(d, a, b, c, x[10], 9, 0x02441453); - c = md5Round2(c, d, a, b, x[15], 14, 0xd8a1e681); - b = md5Round2(b, c, d, a, x[4], 20, 0xe7d3fbc8); - a = md5Round2(a, b, c, d, x[9], 5, 0x21e1cde6); - d = md5Round2(d, a, b, c, x[14], 9, 0xc33707d6); - c = md5Round2(c, d, a, b, x[3], 14, 0xf4d50d87); - b = md5Round2(b, c, d, a, x[8], 20, 0x455a14ed); - a = md5Round2(a, b, c, d, x[13], 5, 0xa9e3e905); - d = md5Round2(d, a, b, c, x[2], 9, 0xfcefa3f8); - c = md5Round2(c, d, a, b, x[7], 14, 0x676f02d9); - b = md5Round2(b, c, d, a, x[12], 20, 0x8d2a4c8a); - - // round 3 - a = md5Round3(a, b, c, d, x[5], 4, 0xfffa3942); - d = md5Round3(d, a, b, c, x[8], 11, 0x8771f681); - c = md5Round3(c, d, a, b, x[11], 16, 0x6d9d6122); - b = md5Round3(b, c, d, a, x[14], 23, 0xfde5380c); - a = md5Round3(a, b, c, d, x[1], 4, 0xa4beea44); - d = md5Round3(d, a, b, c, x[4], 11, 0x4bdecfa9); - c = md5Round3(c, d, a, b, x[7], 16, 0xf6bb4b60); - b = md5Round3(b, c, d, a, x[10], 23, 0xbebfbc70); - a = md5Round3(a, b, c, d, x[13], 4, 0x289b7ec6); - d = md5Round3(d, a, b, c, x[0], 11, 0xeaa127fa); - c = md5Round3(c, d, a, b, x[3], 16, 0xd4ef3085); - b = md5Round3(b, c, d, a, x[6], 23, 0x04881d05); - a = md5Round3(a, b, c, d, x[9], 4, 0xd9d4d039); - d = md5Round3(d, a, b, c, x[12], 11, 0xe6db99e5); - c = md5Round3(c, d, a, b, x[15], 16, 0x1fa27cf8); - b = md5Round3(b, c, d, a, x[2], 23, 0xc4ac5665); - - // round 4 - a = md5Round4(a, b, c, d, x[0], 6, 0xf4292244); - d = md5Round4(d, a, b, c, x[7], 10, 0x432aff97); - c = md5Round4(c, d, a, b, x[14], 15, 0xab9423a7); - b = md5Round4(b, c, d, a, x[5], 21, 0xfc93a039); - a = md5Round4(a, b, c, d, x[12], 6, 0x655b59c3); - d = md5Round4(d, a, b, c, x[3], 10, 0x8f0ccc92); - c = md5Round4(c, d, a, b, x[10], 15, 0xffeff47d); - b = md5Round4(b, c, d, a, x[1], 21, 0x85845dd1); - a = md5Round4(a, b, c, d, x[8], 6, 0x6fa87e4f); - d = md5Round4(d, a, b, c, x[15], 10, 0xfe2ce6e0); - c = md5Round4(c, d, a, b, x[6], 15, 0xa3014314); - b = md5Round4(b, c, d, a, x[13], 21, 0x4e0811a1); - a = md5Round4(a, b, c, d, x[4], 6, 0xf7537e82); - d = md5Round4(d, a, b, c, x[11], 10, 0xbd3af235); - c = md5Round4(c, d, a, b, x[2], 15, 0x2ad7d2bb); - b = md5Round4(b, c, d, a, x[9], 21, 0xeb86d391); - - // increment a, b, c, d - a += aa; - b += bb; - c += cc; - d += dd; - } - - // break digest into bytes - digest[0] = (Guchar)(a & 0xff); - digest[1] = (Guchar)((a >>= 8) & 0xff); - digest[2] = (Guchar)((a >>= 8) & 0xff); - digest[3] = (Guchar)((a >>= 8) & 0xff); - digest[4] = (Guchar)(b & 0xff); - digest[5] = (Guchar)((b >>= 8) & 0xff); - digest[6] = (Guchar)((b >>= 8) & 0xff); - digest[7] = (Guchar)((b >>= 8) & 0xff); - digest[8] = (Guchar)(c & 0xff); - digest[9] = (Guchar)((c >>= 8) & 0xff); - digest[10] = (Guchar)((c >>= 8) & 0xff); - digest[11] = (Guchar)((c >>= 8) & 0xff); - digest[12] = (Guchar)(d & 0xff); - digest[13] = (Guchar)((d >>= 8) & 0xff); - digest[14] = (Guchar)((d >>= 8) & 0xff); - digest[15] = (Guchar)((d >>= 8) & 0xff); -} - -//------------------------------------------------------------------------ -// SHA-256 hash -//------------------------------------------------------------------------ - -static Guint sha256K[64] = { - 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 -}; - -static inline Guint rotr(Guint x, Guint n) { - return (x >> n) | (x << (32 - n)); -} - -static inline Guint sha256Ch(Guint x, Guint y, Guint z) { - return (x & y) ^ (~x & z); -} - -static inline Guint sha256Maj(Guint x, Guint y, Guint z) { - return (x & y) ^ (x & z) ^ (y & z); -} - -static inline Guint sha256Sigma0(Guint x) { - return rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22); -} - -static inline Guint sha256Sigma1(Guint x) { - return rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25); -} - -static inline Guint sha256sigma0(Guint x) { - return rotr(x, 7) ^ rotr(x, 18) ^ (x >> 3); -} - -static inline Guint sha256sigma1(Guint x) { - return rotr(x, 17) ^ rotr(x, 19) ^ (x >> 10); -} - -static void sha256HashBlock(Guchar *blk, Guint *H) { - Guint W[64]; - Guint a, b, c, d, e, f, g, h; - Guint T1, T2; - Guint t; - - // 1. prepare the message schedule - for (t = 0; t < 16; ++t) { - W[t] = (blk[t*4] << 24) | - (blk[t*4 + 1] << 16) | - (blk[t*4 + 2] << 8) | - blk[t*4 + 3]; - } - for (t = 16; t < 64; ++t) { - W[t] = sha256sigma1(W[t-2]) + W[t-7] + sha256sigma0(W[t-15]) + W[t-16]; - } - - // 2. initialize the eight working variables - a = H[0]; - b = H[1]; - c = H[2]; - d = H[3]; - e = H[4]; - f = H[5]; - g = H[6]; - h = H[7]; - - // 3. - for (t = 0; t < 64; ++t) { - T1 = h + sha256Sigma1(e) + sha256Ch(e,f,g) + sha256K[t] + W[t]; - T2 = sha256Sigma0(a) + sha256Maj(a,b,c); - h = g; - g = f; - f = e; - e = d + T1; - d = c; - c = b; - b = a; - a = T1 + T2; - } - - // 4. compute the intermediate hash value - H[0] += a; - H[1] += b; - H[2] += c; - H[3] += d; - H[4] += e; - H[5] += f; - H[6] += g; - H[7] += h; -} - -static void sha256(Guchar *msg, int msgLen, Guchar *hash) { - Guchar blk[64]; - Guint H[8]; - int blkLen, i; - - H[0] = 0x6a09e667; - H[1] = 0xbb67ae85; - H[2] = 0x3c6ef372; - H[3] = 0xa54ff53a; - H[4] = 0x510e527f; - H[5] = 0x9b05688c; - H[6] = 0x1f83d9ab; - H[7] = 0x5be0cd19; - - blkLen = 0; - for (i = 0; i + 64 <= msgLen; i += 64) { - sha256HashBlock(msg + i, H); - } - blkLen = msgLen - i; - if (blkLen > 0) { - memcpy(blk, msg + i, blkLen); - } - - // pad the message - blk[blkLen++] = 0x80; - if (blkLen > 56) { - while (blkLen < 64) { - blk[blkLen++] = 0; - } - sha256HashBlock(blk, H); - blkLen = 0; - } - while (blkLen < 56) { - blk[blkLen++] = 0; - } - blk[56] = 0; - blk[57] = 0; - blk[58] = 0; - blk[59] = 0; - blk[60] = (Guchar)(msgLen >> 21); - blk[61] = (Guchar)(msgLen >> 13); - blk[62] = (Guchar)(msgLen >> 5); - blk[63] = (Guchar)(msgLen << 3); - sha256HashBlock(blk, H); - - // copy the output into the buffer (convert words to bytes) - for (i = 0; i < 8; ++i) { - hash[i*4] = (Guchar)(H[i] >> 24); - hash[i*4 + 1] = (Guchar)(H[i] >> 16); - hash[i*4 + 2] = (Guchar)(H[i] >> 8); - hash[i*4 + 3] = (Guchar)H[i]; - } -} -//------------------------------------------------------------------------ -// SHA-512 hash (see FIPS 180-4) -//------------------------------------------------------------------------ -// SHA 384 and SHA 512 use the same sequence of eighty constant 64 bit words. -static const uint64_t shaK[80] = { - 0x428a2f98d728ae22ull, 0x7137449123ef65cdull, 0xb5c0fbcfec4d3b2full, 0xe9b5dba58189dbbcull, 0x3956c25bf348b538ull, - 0x59f111f1b605d019ull, 0x923f82a4af194f9bull, 0xab1c5ed5da6d8118ull, 0xd807aa98a3030242ull, 0x12835b0145706fbeull, - 0x243185be4ee4b28cull, 0x550c7dc3d5ffb4e2ull, 0x72be5d74f27b896full, 0x80deb1fe3b1696b1ull, 0x9bdc06a725c71235ull, - 0xc19bf174cf692694ull, 0xe49b69c19ef14ad2ull, 0xefbe4786384f25e3ull, 0x0fc19dc68b8cd5b5ull, 0x240ca1cc77ac9c65ull, - 0x2de92c6f592b0275ull, 0x4a7484aa6ea6e483ull, 0x5cb0a9dcbd41fbd4ull, 0x76f988da831153b5ull, 0x983e5152ee66dfabull, - 0xa831c66d2db43210ull, 0xb00327c898fb213full, 0xbf597fc7beef0ee4ull, 0xc6e00bf33da88fc2ull, 0xd5a79147930aa725ull, - 0x06ca6351e003826full, 0x142929670a0e6e70ull, 0x27b70a8546d22ffcull, 0x2e1b21385c26c926ull, 0x4d2c6dfc5ac42aedull, - 0x53380d139d95b3dfull, 0x650a73548baf63deull, 0x766a0abb3c77b2a8ull, 0x81c2c92e47edaee6ull, 0x92722c851482353bull, - 0xa2bfe8a14cf10364ull, 0xa81a664bbc423001ull, 0xc24b8b70d0f89791ull, 0xc76c51a30654be30ull, 0xd192e819d6ef5218ull, - 0xd69906245565a910ull, 0xf40e35855771202aull, 0x106aa07032bbd1b8ull, 0x19a4c116b8d2d0c8ull, 0x1e376c085141ab53ull, - 0x2748774cdf8eeb99ull, 0x34b0bcb5e19b48a8ull, 0x391c0cb3c5c95a63ull, 0x4ed8aa4ae3418acbull, 0x5b9cca4f7763e373ull, - 0x682e6ff3d6b2b8a3ull, 0x748f82ee5defb2fcull, 0x78a5636f43172f60ull, 0x84c87814a1f0ab72ull, 0x8cc702081a6439ecull, - 0x90befffa23631e28ull, 0xa4506cebde82bde9ull, 0xbef9a3f7b2c67915ull, 0xc67178f2e372532bull, 0xca273eceea26619cull, - 0xd186b8c721c0c207ull, 0xeada7dd6cde0eb1eull, 0xf57d4f7fee6ed178ull, 0x06f067aa72176fbaull, 0x0a637dc5a2c898a6ull, - 0x113f9804bef90daeull, 0x1b710b35131c471bull, 0x28db77f523047d84ull, 0x32caab7b40c72493ull, 0x3c9ebe0a15c9bebcull, - 0x431d67c49c100d4cull, 0x4cc5d4becb3e42b6ull, 0x597f299cfc657e2aull, 0x5fcb6fab3ad6faecull, 0x6c44198c4a475817ull -}; - -static inline uint64_t rotr(uint64_t x, uint64_t n) { - return (x >> n) | (x << (64 - n)); -} -static inline uint64_t rotl(uint64_t x, uint64_t n){ - return (x << n) | (x >> (64 - n)); -} -static inline uint64_t sha512Ch(uint64_t x, uint64_t y, uint64_t z) { - return (x & y) ^ (~x & z); -} -static inline uint64_t sha512Maj(uint64_t x, uint64_t y, uint64_t z) { - return (x & y) ^ (x & z) ^ (y & z); -} -static inline uint64_t sha512Sigma0(uint64_t x) { - return rotr(x, 28) ^ rotr(x, 34) ^ rotr(x, 39); -} -static inline uint64_t sha512Sigma1(uint64_t x) { - return rotr(x, 14) ^ rotr(x, 18) ^ rotr(x, 41); -} -static inline uint64_t sha512sigma0(uint64_t x) { - return rotr(x, 1) ^ rotr(x, 8) ^ (x >> 7); -} -static inline uint64_t sha512sigma1(uint64_t x) { - return rotr(x, 19) ^ rotr(x, 61) ^ (x >> 6); -} - -static void sha512HashBlock(Guchar *blk, uint64_t *H) { - uint64_t W[80]; - uint64_t a, b, c, d, e, f, g, h; - uint64_t T1, T2; - Guint t; - - // 1. prepare the message schedule - for (t = 0; t < 16; ++t) { - W[t] = (((uint64_t)blk[t*8] << 56) | - ((uint64_t)blk[t*8 + 1] << 48) | - ((uint64_t)blk[t*8 + 2] << 40) | - ((uint64_t)blk[t*8 + 3] << 32) | - ((uint64_t)blk[t*8 + 4] << 24) | - ((uint64_t)blk[t*8 + 5] << 16) | - ((uint64_t)blk[t*8 + 6] << 8 ) | - ((uint64_t)blk[t*8 + 7])); - } - for (t = 16; t < 80; ++t) { - W[t] = sha512sigma1(W[t-2]) + W[t-7] + sha512sigma0(W[t-15]) + W[t-16]; - } - - // 2. initialize the eight working variables - a = H[0]; - b = H[1]; - c = H[2]; - d = H[3]; - e = H[4]; - f = H[5]; - g = H[6]; - h = H[7]; - - // 3. - for (t = 0; t < 80; ++t) { - T1 = h + sha512Sigma1(e) + sha512Ch(e,f,g) + shaK[t] + W[t]; - T2 = sha512Sigma0(a) + sha512Maj(a,b,c); - h = g; - g = f; - f = e; - e = d + T1; - d = c; - c = b; - b = a; - a = T1 + T2; - } - - // 4. compute the intermediate hash value - H[0] += a; - H[1] += b; - H[2] += c; - H[3] += d; - H[4] += e; - H[5] += f; - H[6] += g; - H[7] += h; -} - -static void sha512(Guchar *msg, int msgLen, Guchar *hash) { - Guchar blk[128]; - uint64_t H[8]; - int blkLen = 0, i; - // setting the initial hash value. - H[0] = 0x6a09e667f3bcc908ull; - H[1] = 0xbb67ae8584caa73bull; - H[2] = 0x3c6ef372fe94f82bull; - H[3] = 0xa54ff53a5f1d36f1ull; - H[4] = 0x510e527fade682d1ull; - H[5] = 0x9b05688c2b3e6c1full; - H[6] = 0x1f83d9abfb41bd6bull; - H[7] = 0x5be0cd19137e2179ull; - - for (i = 0; i + 128 <= msgLen; i += 128) { - sha512HashBlock(msg + i, H); - } - blkLen = msgLen - i; - if (blkLen > 0) { - memcpy(blk, msg + i, blkLen); - } - - // pad the message - blk[blkLen++] = 0x80; - if (blkLen > 112) { - while (blkLen < 128) { - blk[blkLen++] = 0; - } - sha512HashBlock(blk, H); - blkLen = 0; - } - while (blkLen < 112) { - blk[blkLen++] = 0; - } - blk[112] = 0; - blk[113] = 0; - blk[114] = 0; - blk[115] = 0; - blk[116] = 0; - blk[117] = 0; - blk[118] = 0; - blk[119] = 0; - blk[120] = 0; - blk[121] = 0; - blk[122] = 0; - blk[123] = 0; - blk[124] = (Guchar)(msgLen >> 21); - blk[125] = (Guchar)(msgLen >> 13); - blk[126] = (Guchar)(msgLen >> 5); - blk[127] = (Guchar)(msgLen << 3); - - sha512HashBlock(blk, H); - - // copy the output into the buffer (convert words to bytes) - for (i = 0; i < 8; ++i) { - hash[i*8] = (Guchar)(H[i] >> 56); - hash[i*8 + 1] = (Guchar)(H[i] >> 48); - hash[i*8 + 2] = (Guchar)(H[i] >> 40); - hash[i*8 + 3] = (Guchar)(H[i] >> 32); - hash[i*8 + 4] = (Guchar)(H[i] >> 24); - hash[i*8 + 5] = (Guchar)(H[i] >> 16); - hash[i*8 + 6] = (Guchar)(H[i] >> 8); - hash[i*8 + 7] = (Guchar)H[i]; - } -} - -//------------------------------------------------------------------------ -// SHA-384 (see FIPS 180-4) -//------------------------------------------------------------------------ -//The algorithm is defined in the exact same manner as SHA 512 with 2 exceptions -//1.Initial hash value is different. -//2.A 384 bit message digest is obtained by truncating the final hash value. -static void sha384(Guchar *msg, int msgLen, Guchar *hash) { - Guchar blk[128]; - uint64_t H[8]; - int blkLen, i; -//setting initial hash values - H[0] = 0xcbbb9d5dc1059ed8ull; - H[1] = 0x629a292a367cd507ull; - H[2] = 0x9159015a3070dd17ull; - H[3] = 0x152fecd8f70e5939ull; - H[4] = 0x67332667ffc00b31ull; - H[5] = 0x8eb44a8768581511ull; - H[6] = 0xdb0c2e0d64f98fa7ull; - H[7] = 0x47b5481dbefa4fa4ull; -//SHA 384 will use the same sha512HashBlock function. - blkLen = 0; - for (i = 0; i + 128 <= msgLen; i += 128) { - sha512HashBlock(msg + i, H); - } - blkLen = msgLen - i; - if (blkLen > 0) { - memcpy(blk, msg + i, blkLen); - } - - // pad the message - blk[blkLen++] = 0x80; - if (blkLen > 112) { - while (blkLen < 128) { - blk[blkLen++] = 0; - } - sha512HashBlock(blk, H); - blkLen = 0; - } - while (blkLen < 112) { - blk[blkLen++] = 0; - } - blk[112] = 0; - blk[113] = 0; - blk[114] = 0; - blk[115] = 0; - blk[116] = 0; - blk[117] = 0; - blk[118] = 0; - blk[119] = 0; - blk[120] = 0; - blk[121] = 0; - blk[122] = 0; - blk[123] = 0; - blk[124] = (Guchar)(msgLen >> 21); - blk[125] = (Guchar)(msgLen >> 13); - blk[126] = (Guchar)(msgLen >> 5); - blk[127] = (Guchar)(msgLen << 3); - - sha512HashBlock(blk, H); - - // copy the output into the buffer (convert words to bytes) - // hash is truncated to 384 bits. - for (i = 0; i < 6; ++i) { - hash[i*8] = (Guchar)(H[i] >> 56); - hash[i*8 + 1] = (Guchar)(H[i] >> 48); - hash[i*8 + 2] = (Guchar)(H[i] >> 40); - hash[i*8 + 3] = (Guchar)(H[i] >> 32); - hash[i*8 + 4] = (Guchar)(H[i] >> 24); - hash[i*8 + 5] = (Guchar)(H[i] >> 16); - hash[i*8 + 6] = (Guchar)(H[i] >> 8); - hash[i*8 + 7] = (Guchar)H[i]; - } -} - -//------------------------------------------------------------------------ -// Section 7.6.3.3 (Encryption Key algorithm) of ISO/DIS 32000-2 -// Algorithm 2.B:Computing a hash (for revision 6). -//------------------------------------------------------------------------ -static void revision6Hash(GooString *inputPassword, Guchar *K, char *userKey) { - Guchar K1[64*(127+64+48)]; - Guchar E[64*(127+64+48)]; - DecryptAESState state; - Guchar aesKey[16]; - Guchar BE16byteNumber[16]; - - int inputPasswordLength = inputPassword->getLength(); - int KLength = 32; - int userKeyLength = 0; - if (userKey) { - userKeyLength = 48; - } - int sequenceLength; - int totalLength; - int rounds = 0; - - while(rounds < 64 || rounds < E[totalLength-1] + 32 ) { - sequenceLength = inputPasswordLength + KLength + userKeyLength; - totalLength = 64 * sequenceLength; - //a.make the string K1 - memcpy(K1, inputPassword, inputPasswordLength); - memcpy(K1 + inputPasswordLength, K , KLength); - memcpy(K1 + inputPasswordLength + KLength, userKey, userKeyLength); - for(int i = 1; i < 64 ; ++i) { - memcpy(K1 + (i * sequenceLength),K1,sequenceLength); - } - //b.Encrypt K1 - memcpy(aesKey,K,16); - memcpy(state.cbc,K + 16,16); - memcpy(state.buf, state.cbc, 16); // Copy CBC IV to buf - state.bufIdx = 0; - state.paddingReached = gFalse; - aesKeyExpansion(&state,aesKey,16,gFalse); - - for(int i = 0; i < (4 * sequenceLength); i++) { - aesEncryptBlock(&state,K1 + (16 * i)); - memcpy(E +(16 * i),state.buf,16); - } - memcpy(BE16byteNumber,E,16); - //c.Taking the first 16 Bytes of E as unsigned big-endian integer, - //compute the remainder,modulo 3. - uint64_t N1 = 0,N2 = 0,N3 = 0; - // N1 contains first 8 bytes of BE16byteNumber - N1 = ((uint64_t)BE16byteNumber[0] << 56 | (uint64_t)BE16byteNumber[1] << 48 - |(uint64_t)BE16byteNumber[2] << 40 | (uint64_t)BE16byteNumber[3] << 32 - |(uint64_t)BE16byteNumber[4] << 24 | (uint64_t)BE16byteNumber[5] << 16 - |(uint64_t)BE16byteNumber[6] << 8 | (uint64_t)BE16byteNumber[7] ); - uint64_t rem = N1 % 3 ; - // N2 conatains 0s in higer 4 bytes and 9th to 12 th bytes of BE16byteNumber in lower 4 bytes. - N2 = ((uint64_t)BE16byteNumber[8] << 24 | (uint64_t)BE16byteNumber[9] << 16 - |(uint64_t)BE16byteNumber[10] << 8 | (uint64_t)BE16byteNumber[11] ); - rem = ((rem << 32 ) | N2) % 3 ; - // N3 conatains 0s in higer 4 bytes and 13th to 16th bytes of BE16byteNumber in lower 4 bytes. - N3 = ((uint64_t)BE16byteNumber[12] << 24 | (uint64_t)BE16byteNumber[13] << 16 - |(uint64_t)BE16byteNumber[14] << 8 | (uint64_t)BE16byteNumber[15] ); - rem = ((rem << 32 ) | N3) % 3 ; - - //d.If remainder is 0 perform SHA-256 - if(rem == 0) { - KLength = 32; - sha256(E, totalLength, K); - } - // remainder is 1 perform SHA-384 - else if(rem == 1) { - KLength = 48; - sha384(E, totalLength, K); - } - // remainder is 2 perform SHA-512 - else if(rem == 2) { - KLength = 64; - sha512(E, totalLength, K); - } - rounds++; - } - // the first 32 bytes of the final K are the output of the function. -} |