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-rw-r--r--Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc1781
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diff --git a/Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc b/Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc
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--- a/Build/source/libs/poppler/poppler-src/poppler/Decrypt.cc
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@@ -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.
-}