diff options
Diffstat (limited to 'sal/rtl/cipher.cxx')
| -rw-r--r-- | sal/rtl/cipher.cxx | 1433 |
1 files changed, 1433 insertions, 0 deletions
diff --git a/sal/rtl/cipher.cxx b/sal/rtl/cipher.cxx new file mode 100644 index 000000000..bb0884b7a --- /dev/null +++ b/sal/rtl/cipher.cxx @@ -0,0 +1,1433 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <string.h> + +#include <o3tl/safeint.hxx> +#include <sal/types.h> +#include <rtl/alloc.h> +#include <rtl/cipher.h> +#include <algorithm> +#include <cassert> +#include <cstring> +#include <limits> + +#if defined LIBO_CIPHER_OPENSSL_BACKEND +#include <openssl/evp.h> +#endif + +#if !defined LIBO_CIPHER_OPENSSL_BACKEND +#define RTL_CIPHER_NTOHL(c, l) \ + ((l) = (static_cast<sal_uInt32>(*((c)++))) << 24, \ + (l) |= (static_cast<sal_uInt32>(*((c)++))) << 16, \ + (l) |= (static_cast<sal_uInt32>(*((c)++))) << 8, \ + (l) |= (static_cast<sal_uInt32>(*((c)++)))) + +#define RTL_CIPHER_HTONL(l, c) \ + (*((c)++) = static_cast<sal_uInt8>(((l) >> 24) & 0xff), \ + *((c)++) = static_cast<sal_uInt8>(((l) >> 16) & 0xff), \ + *((c)++) = static_cast<sal_uInt8>(((l) >> 8) & 0xff), \ + *((c)++) = static_cast<sal_uInt8>(((l) ) & 0xff)) + +#define RTL_CIPHER_NTOHL64(c, xl, xr, n) \ +{ \ + (xl) = (xr) = 0; \ + (c) += (n); \ + switch ((n)) \ + { \ + case 8: (xr) = (static_cast<sal_uInt32>(*(--(c)))); \ + [[fallthrough]]; \ + case 7: (xr) |= (static_cast<sal_uInt32>(*(--(c)))) << 8; \ + [[fallthrough]]; \ + case 6: (xr) |= (static_cast<sal_uInt32>(*(--(c)))) << 16; \ + [[fallthrough]]; \ + case 5: (xr) |= (static_cast<sal_uInt32>(*(--(c)))) << 24; \ + [[fallthrough]]; \ + case 4: (xl) = (static_cast<sal_uInt32>(*(--(c)))); \ + [[fallthrough]]; \ + case 3: (xl) |= (static_cast<sal_uInt32>(*(--(c)))) << 8; \ + [[fallthrough]]; \ + case 2: (xl) |= (static_cast<sal_uInt32>(*(--(c)))) << 16; \ + [[fallthrough]]; \ + case 1: (xl) |= (static_cast<sal_uInt32>(*(--(c)))) << 24; \ + } \ +} + +#define RTL_CIPHER_HTONL64(xl, xr, c, n) \ +{ \ + (c) += (n); \ + switch ((n)) \ + { \ + case 8: *(--(c)) = static_cast<sal_uInt8>(((xr) ) & 0xff); \ + [[fallthrough]]; \ + case 7: *(--(c)) = static_cast<sal_uInt8>(((xr) >> 8) & 0xff); \ + [[fallthrough]]; \ + case 6: *(--(c)) = static_cast<sal_uInt8>(((xr) >> 16) & 0xff); \ + [[fallthrough]]; \ + case 5: *(--(c)) = static_cast<sal_uInt8>(((xr) >> 24) & 0xff); \ + [[fallthrough]]; \ + case 4: *(--(c)) = static_cast<sal_uInt8>(((xl) ) & 0xff); \ + [[fallthrough]]; \ + case 3: *(--(c)) = static_cast<sal_uInt8>(((xl) >> 8) & 0xff); \ + [[fallthrough]]; \ + case 2: *(--(c)) = static_cast<sal_uInt8>(((xl) >> 16) & 0xff); \ + [[fallthrough]]; \ + case 1: *(--(c)) = static_cast<sal_uInt8>(((xl) >> 24) & 0xff); \ + } \ +} +#endif + +typedef rtlCipherError(cipher_init_t) ( + rtlCipher Cipher, + rtlCipherDirection Direction, + const sal_uInt8 *pKeyData, sal_Size nKeyLen, + const sal_uInt8 *pArgData, sal_Size nArgLen); + +typedef rtlCipherError(cipher_update_t) ( + rtlCipher Cipher, + const void *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen); + +typedef void (cipher_delete_t) (rtlCipher Cipher); + +namespace { + +struct Cipher_Impl +{ + rtlCipherAlgorithm m_algorithm; + rtlCipherDirection m_direction; + rtlCipherMode m_mode; + + cipher_init_t *m_init; + cipher_update_t *m_encode; + cipher_update_t *m_decode; + cipher_delete_t *m_delete; +}; + +} + +rtlCipher SAL_CALL rtl_cipher_create( + rtlCipherAlgorithm Algorithm, + rtlCipherMode Mode) SAL_THROW_EXTERN_C() +{ + rtlCipher Cipher = nullptr; + switch (Algorithm) + { + case rtl_Cipher_AlgorithmBF: + Cipher = rtl_cipher_createBF (Mode); + break; + + case rtl_Cipher_AlgorithmARCFOUR: + Cipher = rtl_cipher_createARCFOUR (Mode); + break; + + default: /* rtl_Cipher_AlgorithmInvalid */ + break; + } + return Cipher; +} + +rtlCipherError SAL_CALL rtl_cipher_init( + rtlCipher Cipher, + rtlCipherDirection Direction, + const sal_uInt8 *pKeyData, sal_Size nKeyLen, + const sal_uInt8 *pArgData, sal_Size nArgLen) SAL_THROW_EXTERN_C() +{ + Cipher_Impl *pImpl = static_cast<Cipher_Impl*>(Cipher); + if (!pImpl) + return rtl_Cipher_E_Argument; + + if (!pImpl->m_init) + return rtl_Cipher_E_Unknown; + + return (pImpl->m_init)( + Cipher, Direction, pKeyData, nKeyLen, pArgData, nArgLen); +} + +rtlCipherError SAL_CALL rtl_cipher_encode( + rtlCipher Cipher, + const void *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C() +{ + Cipher_Impl *pImpl = static_cast<Cipher_Impl*>(Cipher); + if (!pImpl) + return rtl_Cipher_E_Argument; + + if (!pImpl->m_encode) + return rtl_Cipher_E_Unknown; + + return (pImpl->m_encode)(Cipher, pData, nDatLen, pBuffer, nBufLen); +} + +rtlCipherError SAL_CALL rtl_cipher_decode( + rtlCipher Cipher, + const void *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C() +{ + Cipher_Impl *pImpl = static_cast<Cipher_Impl*>(Cipher); + if (!pImpl) + return rtl_Cipher_E_Argument; + + if (!pImpl->m_decode) + return rtl_Cipher_E_Unknown; + + return (pImpl->m_decode)(Cipher, pData, nDatLen, pBuffer, nBufLen); +} + +void SAL_CALL rtl_cipher_destroy(rtlCipher Cipher) SAL_THROW_EXTERN_C() +{ + Cipher_Impl *pImpl = static_cast<Cipher_Impl*>(Cipher); + if (pImpl && pImpl->m_delete) + pImpl->m_delete(Cipher); +} + +namespace { + +#if !defined LIBO_CIPHER_OPENSSL_BACKEND +#define CIPHER_ROUNDS_BF 16 + +struct CipherKeyBF +{ + sal_uInt32 m_S[4][256]; + sal_uInt32 m_P[CIPHER_ROUNDS_BF + 2]; +}; +#endif + +struct CipherContextBF +{ +#if defined LIBO_CIPHER_OPENSSL_BACKEND + EVP_CIPHER_CTX * m_context; +#else + CipherKeyBF m_key; + union + { + sal_uInt32 m_long[2]; + sal_uInt8 m_byte[8]; + } m_iv; + sal_uInt32 m_offset; +#endif +}; + +struct CipherBF_Impl +{ + Cipher_Impl m_cipher; + CipherContextBF m_context; +}; + +} + +#if !defined LIBO_CIPHER_OPENSSL_BACKEND +static rtlCipherError BF_init( + CipherContextBF *ctx, + rtlCipherMode eMode, + const sal_uInt8 *pKeyData, sal_Size nKeyLen, + const sal_uInt8 *pArgData, sal_Size nArgLen); +#endif + +static rtlCipherError BF_update( + CipherContextBF *ctx, + rtlCipherMode eMode, + rtlCipherDirection eDirection, + const sal_uInt8 *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen); + +#if !defined LIBO_CIPHER_OPENSSL_BACKEND +static void BF_updateECB( + CipherContextBF *ctx, + rtlCipherDirection direction, + const sal_uInt8 *pData, + sal_uInt8 *pBuffer, + sal_Size nLength); + +static void BF_updateCBC( + CipherContextBF *ctx, + rtlCipherDirection direction, + const sal_uInt8 *pData, + sal_uInt8 *pBuffer, + sal_Size nLength); + +static void BF_updateCFB( + CipherContextBF *ctx, + rtlCipherDirection direction, + const sal_uInt8 *pData, + sal_uInt8 *pBuffer); + +static void BF_encode(CipherKeyBF *key, sal_uInt32 *xl, sal_uInt32 *xr); + +static void BF_decode(CipherKeyBF *key, sal_uInt32 *xl, sal_uInt32 *xr); + +static sal_uInt32 BF(CipherKeyBF *key, sal_uInt32 x); + +const CipherKeyBF BF_key = +{ + /* S */ + { + /* S[0] */ + { + /* 0 */ + 0xD1310BA6L, 0x98DFB5ACL, 0x2FFD72DBL, 0xD01ADFB7L, + 0xB8E1AFEDL, 0x6A267E96L, 0xBA7C9045L, 0xF12C7F99L, + 0x24A19947L, 0xB3916CF7L, 0x0801F2E2L, 0x858EFC16L, + 0x636920D8L, 0x71574E69L, 0xA458FEA3L, 0xF4933D7EL, + + /* 1 */ + 0x0D95748FL, 0x728EB658L, 0x718BCD58L, 0x82154AEEL, + 0x7B54A41DL, 0xC25A59B5L, 0x9C30D539L, 0x2AF26013L, + 0xC5D1B023L, 0x286085F0L, 0xCA417918L, 0xB8DB38EFL, + 0x8E79DCB0L, 0x603A180EL, 0x6C9E0E8BL, 0xB01E8A3EL, + + /* 2 */ + 0xD71577C1L, 0xBD314B27L, 0x78AF2FDAL, 0x55605C60L, + 0xE65525F3L, 0xAA55AB94L, 0x57489862L, 0x63E81440L, + 0x55CA396AL, 0x2AAB10B6L, 0xB4CC5C34L, 0x1141E8CEL, + 0xA15486AFL, 0x7C72E993L, 0xB3EE1411L, 0x636FBC2AL, + + /* 3 */ + 0x2BA9C55DL, 0x741831F6L, 0xCE5C3E16L, 0x9B87931EL, + 0xAFD6BA33L, 0x6C24CF5CL, 0x7A325381L, 0x28958677L, + 0x3B8F4898L, 0x6B4BB9AFL, 0xC4BFE81BL, 0x66282193L, + 0x61D809CCL, 0xFB21A991L, 0x487CAC60L, 0x5DEC8032L, + + /* 4 */ + 0xEF845D5DL, 0xE98575B1L, 0xDC262302L, 0xEB651B88L, + 0x23893E81L, 0xD396ACC5L, 0x0F6D6FF3L, 0x83F44239L, + 0x2E0B4482L, 0xA4842004L, 0x69C8F04AL, 0x9E1F9B5EL, + 0x21C66842L, 0xF6E96C9AL, 0x670C9C61L, 0xABD388F0L, + + /* 5 */ + 0x6A51A0D2L, 0xD8542F68L, 0x960FA728L, 0xAB5133A3L, + 0x6EEF0B6CL, 0x137A3BE4L, 0xBA3BF050L, 0x7EFB2A98L, + 0xA1F1651DL, 0x39AF0176L, 0x66CA593EL, 0x82430E88L, + 0x8CEE8619L, 0x456F9FB4L, 0x7D84A5C3L, 0x3B8B5EBEL, + + /* 6 */ + 0xE06F75D8L, 0x85C12073L, 0x401A449FL, 0x56C16AA6L, + 0x4ED3AA62L, 0x363F7706L, 0x1BFEDF72L, 0x429B023DL, + 0x37D0D724L, 0xD00A1248L, 0xDB0FEAD3L, 0x49F1C09BL, + 0x075372C9L, 0x80991B7BL, 0x25D479D8L, 0xF6E8DEF7L, + + /* 7 */ + 0xE3FE501AL, 0xB6794C3BL, 0x976CE0BDL, 0x04C006BAL, + 0xC1A94FB6L, 0x409F60C4L, 0x5E5C9EC2L, 0x196A2463L, + 0x68FB6FAFL, 0x3E6C53B5L, 0x1339B2EBL, 0x3B52EC6FL, + 0x6DFC511FL, 0x9B30952CL, 0xCC814544L, 0xAF5EBD09L, + + /* 8 */ + 0xBEE3D004L, 0xDE334AFDL, 0x660F2807L, 0x192E4BB3L, + 0xC0CBA857L, 0x45C8740FL, 0xD20B5F39L, 0xB9D3FBDBL, + 0x5579C0BDL, 0x1A60320AL, 0xD6A100C6L, 0x402C7279L, + 0x679F25FEL, 0xFB1FA3CCL, 0x8EA5E9F8L, 0xDB3222F8L, + + /* 9 */ + 0x3C7516DFL, 0xFD616B15L, 0x2F501EC8L, 0xAD0552ABL, + 0x323DB5FAL, 0xFD238760L, 0x53317B48L, 0x3E00DF82L, + 0x9E5C57BBL, 0xCA6F8CA0L, 0x1A87562EL, 0xDF1769DBL, + 0xD542A8F6L, 0x287EFFC3L, 0xAC6732C6L, 0x8C4F5573L, + + /* A */ + 0x695B27B0L, 0xBBCA58C8L, 0xE1FFA35DL, 0xB8F011A0L, + 0x10FA3D98L, 0xFD2183B8L, 0x4AFCB56CL, 0x2DD1D35BL, + 0x9A53E479L, 0xB6F84565L, 0xD28E49BCL, 0x4BFB9790L, + 0xE1DDF2DAL, 0xA4CB7E33L, 0x62FB1341L, 0xCEE4C6E8L, + + /* B */ + 0xEF20CADAL, 0x36774C01L, 0xD07E9EFEL, 0x2BF11FB4L, + 0x95DBDA4DL, 0xAE909198L, 0xEAAD8E71L, 0x6B93D5A0L, + 0xD08ED1D0L, 0xAFC725E0L, 0x8E3C5B2FL, 0x8E7594B7L, + 0x8FF6E2FBL, 0xF2122B64L, 0x8888B812L, 0x900DF01CL, + + /* C */ + 0x4FAD5EA0L, 0x688FC31CL, 0xD1CFF191L, 0xB3A8C1ADL, + 0x2F2F2218L, 0xBE0E1777L, 0xEA752DFEL, 0x8B021FA1L, + 0xE5A0CC0FL, 0xB56F74E8L, 0x18ACF3D6L, 0xCE89E299L, + 0xB4A84FE0L, 0xFD13E0B7L, 0x7CC43B81L, 0xD2ADA8D9L, + + /* D */ + 0x165FA266L, 0x80957705L, 0x93CC7314L, 0x211A1477L, + 0xE6AD2065L, 0x77B5FA86L, 0xC75442F5L, 0xFB9D35CFL, + 0xEBCDAF0CL, 0x7B3E89A0L, 0xD6411BD3L, 0xAE1E7E49L, + 0x00250E2DL, 0x2071B35EL, 0x226800BBL, 0x57B8E0AFL, + + /* E */ + 0x2464369BL, 0xF009B91EL, 0x5563911DL, 0x59DFA6AAL, + 0x78C14389L, 0xD95A537FL, 0x207D5BA2L, 0x02E5B9C5L, + 0x83260376L, 0x6295CFA9L, 0x11C81968L, 0x4E734A41L, + 0xB3472DCAL, 0x7B14A94AL, 0x1B510052L, 0x9A532915L, + + /* F */ + 0xD60F573FL, 0xBC9BC6E4L, 0x2B60A476L, 0x81E67400L, + 0x08BA6FB5L, 0x571BE91FL, 0xF296EC6BL, 0x2A0DD915L, + 0xB6636521L, 0xE7B9F9B6L, 0xFF34052EL, 0xC5855664L, + 0x53B02D5DL, 0xA99F8FA1L, 0x08BA4799L, 0x6E85076AL + }, + + /* S[1] */ + { + 0x4B7A70E9L, 0xB5B32944L, 0xDB75092EL, 0xC4192623L, + 0xAD6EA6B0L, 0x49A7DF7DL, 0x9CEE60B8L, 0x8FEDB266L, + 0xECAA8C71L, 0x699A17FFL, 0x5664526CL, 0xC2B19EE1L, + 0x193602A5L, 0x75094C29L, 0xA0591340L, 0xE4183A3EL, + + 0x3F54989AL, 0x5B429D65L, 0x6B8FE4D6L, 0x99F73FD6L, + 0xA1D29C07L, 0xEFE830F5L, 0x4D2D38E6L, 0xF0255DC1L, + 0x4CDD2086L, 0x8470EB26L, 0x6382E9C6L, 0x021ECC5EL, + 0x09686B3FL, 0x3EBAEFC9L, 0x3C971814L, 0x6B6A70A1L, + + 0x687F3584L, 0x52A0E286L, 0xB79C5305L, 0xAA500737L, + 0x3E07841CL, 0x7FDEAE5CL, 0x8E7D44ECL, 0x5716F2B8L, + 0xB03ADA37L, 0xF0500C0DL, 0xF01C1F04L, 0x0200B3FFL, + 0xAE0CF51AL, 0x3CB574B2L, 0x25837A58L, 0xDC0921BDL, + + 0xD19113F9L, 0x7CA92FF6L, 0x94324773L, 0x22F54701L, + 0x3AE5E581L, 0x37C2DADCL, 0xC8B57634L, 0x9AF3DDA7L, + 0xA9446146L, 0x0FD0030EL, 0xECC8C73EL, 0xA4751E41L, + 0xE238CD99L, 0x3BEA0E2FL, 0x3280BBA1L, 0x183EB331L, + + 0x4E548B38L, 0x4F6DB908L, 0x6F420D03L, 0xF60A04BFL, + 0x2CB81290L, 0x24977C79L, 0x5679B072L, 0xBCAF89AFL, + 0xDE9A771FL, 0xD9930810L, 0xB38BAE12L, 0xDCCF3F2EL, + 0x5512721FL, 0x2E6B7124L, 0x501ADDE6L, 0x9F84CD87L, + + 0x7A584718L, 0x7408DA17L, 0xBC9F9ABCL, 0xE94B7D8CL, + 0xEC7AEC3AL, 0xDB851DFAL, 0x63094366L, 0xC464C3D2L, + 0xEF1C1847L, 0x3215D908L, 0xDD433B37L, 0x24C2BA16L, + 0x12A14D43L, 0x2A65C451L, 0x50940002L, 0x133AE4DDL, + + 0x71DFF89EL, 0x10314E55L, 0x81AC77D6L, 0x5F11199BL, + 0x043556F1L, 0xD7A3C76BL, 0x3C11183BL, 0x5924A509L, + 0xF28FE6EDL, 0x97F1FBFAL, 0x9EBABF2CL, 0x1E153C6EL, + 0x86E34570L, 0xEAE96FB1L, 0x860E5E0AL, 0x5A3E2AB3L, + + 0x771FE71CL, 0x4E3D06FAL, 0x2965DCB9L, 0x99E71D0FL, + 0x803E89D6L, 0x5266C825L, 0x2E4CC978L, 0x9C10B36AL, + 0xC6150EBAL, 0x94E2EA78L, 0xA5FC3C53L, 0x1E0A2DF4L, + 0xF2F74EA7L, 0x361D2B3DL, 0x1939260FL, 0x19C27960L, + + 0x5223A708L, 0xF71312B6L, 0xEBADFE6EL, 0xEAC31F66L, + 0xE3BC4595L, 0xA67BC883L, 0xB17F37D1L, 0x018CFF28L, + 0xC332DDEFL, 0xBE6C5AA5L, 0x65582185L, 0x68AB9802L, + 0xEECEA50FL, 0xDB2F953BL, 0x2AEF7DADL, 0x5B6E2F84L, + + 0x1521B628L, 0x29076170L, 0xECDD4775L, 0x619F1510L, + 0x13CCA830L, 0xEB61BD96L, 0x0334FE1EL, 0xAA0363CFL, + 0xB5735C90L, 0x4C70A239L, 0xD59E9E0BL, 0xCBAADE14L, + 0xEECC86BCL, 0x60622CA7L, 0x9CAB5CABL, 0xB2F3846EL, + + 0x648B1EAFL, 0x19BDF0CAL, 0xA02369B9L, 0x655ABB50L, + 0x40685A32L, 0x3C2AB4B3L, 0x319EE9D5L, 0xC021B8F7L, + 0x9B540B19L, 0x875FA099L, 0x95F7997EL, 0x623D7DA8L, + 0xF837889AL, 0x97E32D77L, 0x11ED935FL, 0x16681281L, + + 0x0E358829L, 0xC7E61FD6L, 0x96DEDFA1L, 0x7858BA99L, + 0x57F584A5L, 0x1B227263L, 0x9B83C3FFL, 0x1AC24696L, + 0xCDB30AEBL, 0x532E3054L, 0x8FD948E4L, 0x6DBC3128L, + 0x58EBF2EFL, 0x34C6FFEAL, 0xFE28ED61L, 0xEE7C3C73L, + + 0x5D4A14D9L, 0xE864B7E3L, 0x42105D14L, 0x203E13E0L, + 0x45EEE2B6L, 0xA3AAABEAL, 0xDB6C4F15L, 0xFACB4FD0L, + 0xC742F442L, 0xEF6ABBB5L, 0x654F3B1DL, 0x41CD2105L, + 0xD81E799EL, 0x86854DC7L, 0xE44B476AL, 0x3D816250L, + + 0xCF62A1F2L, 0x5B8D2646L, 0xFC8883A0L, 0xC1C7B6A3L, + 0x7F1524C3L, 0x69CB7492L, 0x47848A0BL, 0x5692B285L, + 0x095BBF00L, 0xAD19489DL, 0x1462B174L, 0x23820E00L, + 0x58428D2AL, 0x0C55F5EAL, 0x1DADF43EL, 0x233F7061L, + + 0x3372F092L, 0x8D937E41L, 0xD65FECF1L, 0x6C223BDBL, + 0x7CDE3759L, 0xCBEE7460L, 0x4085F2A7L, 0xCE77326EL, + 0xA6078084L, 0x19F8509EL, 0xE8EFD855L, 0x61D99735L, + 0xA969A7AAL, 0xC50C06C2L, 0x5A04ABFCL, 0x800BCADCL, + + 0x9E447A2EL, 0xC3453484L, 0xFDD56705L, 0x0E1E9EC9L, + 0xDB73DBD3L, 0x105588CDL, 0x675FDA79L, 0xE3674340L, + 0xC5C43465L, 0x713E38D8L, 0x3D28F89EL, 0xF16DFF20L, + 0x153E21E7L, 0x8FB03D4AL, 0xE6E39F2BL, 0xDB83ADF7L + }, + + /* S[2] */ + { + 0xE93D5A68L, 0x948140F7L, 0xF64C261CL, 0x94692934L, + 0x411520F7L, 0x7602D4F7L, 0xBCF46B2EL, 0xD4A20068L, + 0xD4082471L, 0x3320F46AL, 0x43B7D4B7L, 0x500061AFL, + 0x1E39F62EL, 0x97244546L, 0x14214F74L, 0xBF8B8840L, + + 0x4D95FC1DL, 0x96B591AFL, 0x70F4DDD3L, 0x66A02F45L, + 0xBFBC09ECL, 0x03BD9785L, 0x7FAC6DD0L, 0x31CB8504L, + 0x96EB27B3L, 0x55FD3941L, 0xDA2547E6L, 0xABCA0A9AL, + 0x28507825L, 0x530429F4L, 0x0A2C86DAL, 0xE9B66DFBL, + + 0x68DC1462L, 0xD7486900L, 0x680EC0A4L, 0x27A18DEEL, + 0x4F3FFEA2L, 0xE887AD8CL, 0xB58CE006L, 0x7AF4D6B6L, + 0xAACE1E7CL, 0xD3375FECL, 0xCE78A399L, 0x406B2A42L, + 0x20FE9E35L, 0xD9F385B9L, 0xEE39D7ABL, 0x3B124E8BL, + + 0x1DC9FAF7L, 0x4B6D1856L, 0x26A36631L, 0xEAE397B2L, + 0x3A6EFA74L, 0xDD5B4332L, 0x6841E7F7L, 0xCA7820FBL, + 0xFB0AF54EL, 0xD8FEB397L, 0x454056ACL, 0xBA489527L, + 0x55533A3AL, 0x20838D87L, 0xFE6BA9B7L, 0xD096954BL, + + 0x55A867BCL, 0xA1159A58L, 0xCCA92963L, 0x99E1DB33L, + 0xA62A4A56L, 0x3F3125F9L, 0x5EF47E1CL, 0x9029317CL, + 0xFDF8E802L, 0x04272F70L, 0x80BB155CL, 0x05282CE3L, + 0x95C11548L, 0xE4C66D22L, 0x48C1133FL, 0xC70F86DCL, + + 0x07F9C9EEL, 0x41041F0FL, 0x404779A4L, 0x5D886E17L, + 0x325F51EBL, 0xD59BC0D1L, 0xF2BCC18FL, 0x41113564L, + 0x257B7834L, 0x602A9C60L, 0xDFF8E8A3L, 0x1F636C1BL, + 0x0E12B4C2L, 0x02E1329EL, 0xAF664FD1L, 0xCAD18115L, + + 0x6B2395E0L, 0x333E92E1L, 0x3B240B62L, 0xEEBEB922L, + 0x85B2A20EL, 0xE6BA0D99L, 0xDE720C8CL, 0x2DA2F728L, + 0xD0127845L, 0x95B794FDL, 0x647D0862L, 0xE7CCF5F0L, + 0x5449A36FL, 0x877D48FAL, 0xC39DFD27L, 0xF33E8D1EL, + + 0x0A476341L, 0x992EFF74L, 0x3A6F6EABL, 0xF4F8FD37L, + 0xA812DC60L, 0xA1EBDDF8L, 0x991BE14CL, 0xDB6E6B0DL, + 0xC67B5510L, 0x6D672C37L, 0x2765D43BL, 0xDCD0E804L, + 0xF1290DC7L, 0xCC00FFA3L, 0xB5390F92L, 0x690FED0BL, + + 0x667B9FFBL, 0xCEDB7D9CL, 0xA091CF0BL, 0xD9155EA3L, + 0xBB132F88L, 0x515BAD24L, 0x7B9479BFL, 0x763BD6EBL, + 0x37392EB3L, 0xCC115979L, 0x8026E297L, 0xF42E312DL, + 0x6842ADA7L, 0xC66A2B3BL, 0x12754CCCL, 0x782EF11CL, + + 0x6A124237L, 0xB79251E7L, 0x06A1BBE6L, 0x4BFB6350L, + 0x1A6B1018L, 0x11CAEDFAL, 0x3D25BDD8L, 0xE2E1C3C9L, + 0x44421659L, 0x0A121386L, 0xD90CEC6EL, 0xD5ABEA2AL, + 0x64AF674EL, 0xDA86A85FL, 0xBEBFE988L, 0x64E4C3FEL, + + 0x9DBC8057L, 0xF0F7C086L, 0x60787BF8L, 0x6003604DL, + 0xD1FD8346L, 0xF6381FB0L, 0x7745AE04L, 0xD736FCCCL, + 0x83426B33L, 0xF01EAB71L, 0xB0804187L, 0x3C005E5FL, + 0x77A057BEL, 0xBDE8AE24L, 0x55464299L, 0xBF582E61L, + + 0x4E58F48FL, 0xF2DDFDA2L, 0xF474EF38L, 0x8789BDC2L, + 0x5366F9C3L, 0xC8B38E74L, 0xB475F255L, 0x46FCD9B9L, + 0x7AEB2661L, 0x8B1DDF84L, 0x846A0E79L, 0x915F95E2L, + 0x466E598EL, 0x20B45770L, 0x8CD55591L, 0xC902DE4CL, + + 0xB90BACE1L, 0xBB8205D0L, 0x11A86248L, 0x7574A99EL, + 0xB77F19B6L, 0xE0A9DC09L, 0x662D09A1L, 0xC4324633L, + 0xE85A1F02L, 0x09F0BE8CL, 0x4A99A025L, 0x1D6EFE10L, + 0x1AB93D1DL, 0x0BA5A4DFL, 0xA186F20FL, 0x2868F169L, + + 0xDCB7DA83L, 0x573906FEL, 0xA1E2CE9BL, 0x4FCD7F52L, + 0x50115E01L, 0xA70683FAL, 0xA002B5C4L, 0x0DE6D027L, + 0x9AF88C27L, 0x773F8641L, 0xC3604C06L, 0x61A806B5L, + 0xF0177A28L, 0xC0F586E0L, 0x006058AAL, 0x30DC7D62L, + + 0x11E69ED7L, 0x2338EA63L, 0x53C2DD94L, 0xC2C21634L, + 0xBBCBEE56L, 0x90BCB6DEL, 0xEBFC7DA1L, 0xCE591D76L, + 0x6F05E409L, 0x4B7C0188L, 0x39720A3DL, 0x7C927C24L, + 0x86E3725FL, 0x724D9DB9L, 0x1AC15BB4L, 0xD39EB8FCL, + + 0xED545578L, 0x08FCA5B5L, 0xD83D7CD3L, 0x4DAD0FC4L, + 0x1E50EF5EL, 0xB161E6F8L, 0xA28514D9L, 0x6C51133CL, + 0x6FD5C7E7L, 0x56E14EC4L, 0x362ABFCEL, 0xDDC6C837L, + 0xD79A3234L, 0x92638212L, 0x670EFA8EL, 0x406000E0L + }, + + /* S[3] */ + { + 0x3A39CE37L, 0xD3FAF5CFL, 0xABC27737L, 0x5AC52D1BL, + 0x5CB0679EL, 0x4FA33742L, 0xD3822740L, 0x99BC9BBEL, + 0xD5118E9DL, 0xBF0F7315L, 0xD62D1C7EL, 0xC700C47BL, + 0xB78C1B6BL, 0x21A19045L, 0xB26EB1BEL, 0x6A366EB4L, + + 0x5748AB2FL, 0xBC946E79L, 0xC6A376D2L, 0x6549C2C8L, + 0x530FF8EEL, 0x468DDE7DL, 0xD5730A1DL, 0x4CD04DC6L, + 0x2939BBDBL, 0xA9BA4650L, 0xAC9526E8L, 0xBE5EE304L, + 0xA1FAD5F0L, 0x6A2D519AL, 0x63EF8CE2L, 0x9A86EE22L, + + 0xC089C2B8L, 0x43242EF6L, 0xA51E03AAL, 0x9CF2D0A4L, + 0x83C061BAL, 0x9BE96A4DL, 0x8FE51550L, 0xBA645BD6L, + 0x2826A2F9L, 0xA73A3AE1L, 0x4BA99586L, 0xEF5562E9L, + 0xC72FEFD3L, 0xF752F7DAL, 0x3F046F69L, 0x77FA0A59L, + + 0x80E4A915L, 0x87B08601L, 0x9B09E6ADL, 0x3B3EE593L, + 0xE990FD5AL, 0x9E34D797L, 0x2CF0B7D9L, 0x022B8B51L, + 0x96D5AC3AL, 0x017DA67DL, 0xD1CF3ED6L, 0x7C7D2D28L, + 0x1F9F25CFL, 0xADF2B89BL, 0x5AD6B472L, 0x5A88F54CL, + + 0xE029AC71L, 0xE019A5E6L, 0x47B0ACFDL, 0xED93FA9BL, + 0xE8D3C48DL, 0x283B57CCL, 0xF8D56629L, 0x79132E28L, + 0x785F0191L, 0xED756055L, 0xF7960E44L, 0xE3D35E8CL, + 0x15056DD4L, 0x88F46DBAL, 0x03A16125L, 0x0564F0BDL, + + 0xC3EB9E15L, 0x3C9057A2L, 0x97271AECL, 0xA93A072AL, + 0x1B3F6D9BL, 0x1E6321F5L, 0xF59C66FBL, 0x26DCF319L, + 0x7533D928L, 0xB155FDF5L, 0x03563482L, 0x8ABA3CBBL, + 0x28517711L, 0xC20AD9F8L, 0xABCC5167L, 0xCCAD925FL, + + 0x4DE81751L, 0x3830DC8EL, 0x379D5862L, 0x9320F991L, + 0xEA7A90C2L, 0xFB3E7BCEL, 0x5121CE64L, 0x774FBE32L, + 0xA8B6E37EL, 0xC3293D46L, 0x48DE5369L, 0x6413E680L, + 0xA2AE0810L, 0xDD6DB224L, 0x69852DFDL, 0x09072166L, + + 0xB39A460AL, 0x6445C0DDL, 0x586CDECFL, 0x1C20C8AEL, + 0x5BBEF7DDL, 0x1B588D40L, 0xCCD2017FL, 0x6BB4E3BBL, + 0xDDA26A7EL, 0x3A59FF45L, 0x3E350A44L, 0xBCB4CDD5L, + 0x72EACEA8L, 0xFA6484BBL, 0x8D6612AEL, 0xBF3C6F47L, + + 0xD29BE463L, 0x542F5D9EL, 0xAEC2771BL, 0xF64E6370L, + 0x740E0D8DL, 0xE75B1357L, 0xF8721671L, 0xAF537D5DL, + 0x4040CB08L, 0x4EB4E2CCL, 0x34D2466AL, 0x0115AF84L, + 0xE1B00428L, 0x95983A1DL, 0x06B89FB4L, 0xCE6EA048L, + + 0x6F3F3B82L, 0x3520AB82L, 0x011A1D4BL, 0x277227F8L, + 0x611560B1L, 0xE7933FDCL, 0xBB3A792BL, 0x344525BDL, + 0xA08839E1L, 0x51CE794BL, 0x2F32C9B7L, 0xA01FBAC9L, + 0xE01CC87EL, 0xBCC7D1F6L, 0xCF0111C3L, 0xA1E8AAC7L, + + 0x1A908749L, 0xD44FBD9AL, 0xD0DADECBL, 0xD50ADA38L, + 0x0339C32AL, 0xC6913667L, 0x8DF9317CL, 0xE0B12B4FL, + 0xF79E59B7L, 0x43F5BB3AL, 0xF2D519FFL, 0x27D9459CL, + 0xBF97222CL, 0x15E6FC2AL, 0x0F91FC71L, 0x9B941525L, + + 0xFAE59361L, 0xCEB69CEBL, 0xC2A86459L, 0x12BAA8D1L, + 0xB6C1075EL, 0xE3056A0CL, 0x10D25065L, 0xCB03A442L, + 0xE0EC6E0EL, 0x1698DB3BL, 0x4C98A0BEL, 0x3278E964L, + 0x9F1F9532L, 0xE0D392DFL, 0xD3A0342BL, 0x8971F21EL, + + 0x1B0A7441L, 0x4BA3348CL, 0xC5BE7120L, 0xC37632D8L, + 0xDF359F8DL, 0x9B992F2EL, 0xE60B6F47L, 0x0FE3F11DL, + 0xE54CDA54L, 0x1EDAD891L, 0xCE6279CFL, 0xCD3E7E6FL, + 0x1618B166L, 0xFD2C1D05L, 0x848FD2C5L, 0xF6FB2299L, + + 0xF523F357L, 0xA6327623L, 0x93A83531L, 0x56CCCD02L, + 0xACF08162L, 0x5A75EBB5L, 0x6E163697L, 0x88D273CCL, + 0xDE966292L, 0x81B949D0L, 0x4C50901BL, 0x71C65614L, + 0xE6C6C7BDL, 0x327A140AL, 0x45E1D006L, 0xC3F27B9AL, + + 0xC9AA53FDL, 0x62A80F00L, 0xBB25BFE2L, 0x35BDD2F6L, + 0x71126905L, 0xB2040222L, 0xB6CBCF7CL, 0xCD769C2BL, + 0x53113EC0L, 0x1640E3D3L, 0x38ABBD60L, 0x2547ADF0L, + 0xBA38209CL, 0xF746CE76L, 0x77AFA1C5L, 0x20756060L, + + 0x85CBFE4EL, 0x8AE88DD8L, 0x7AAAF9B0L, 0x4CF9AA7EL, + 0x1948C25CL, 0x02FB8A8CL, 0x01C36AE4L, 0xD6EBE1F9L, + 0x90D4F869L, 0xA65CDEA0L, 0x3F09252DL, 0xC208E69FL, + 0xB74E6132L, 0xCE77E25BL, 0x578FDFE3L, 0x3AC372E6L + } + }, + + /* P */ + { + 0x243F6A88L, 0x85A308D3L, 0x13198A2EL, 0x03707344L, + 0xA4093822L, 0x299F31D0L, 0x082EFA98L, 0xEC4E6C89L, + 0x452821E6L, 0x38D01377L, 0xBE5466CFL, 0x34E90C6CL, + 0xC0AC29B7L, 0xC97C50DDL, 0x3F84D5B5L, 0xB5470917L, + 0x9216D5D9L, 0x8979FB1BL + } +}; +#endif + +#if !defined LIBO_CIPHER_OPENSSL_BACKEND +static rtlCipherError BF_init( + CipherContextBF *ctx, + rtlCipherMode eMode, + const sal_uInt8 *pKeyData, sal_Size nKeyLen, + const sal_uInt8 *pArgData, sal_Size nArgLen) +{ + CipherKeyBF *key; + sal_uInt32 D, DL, DR; + sal_uInt16 i, j, k; + + key = &(ctx->m_key); + + memcpy(key, &BF_key, sizeof (CipherKeyBF)); + memset(&(ctx->m_iv), 0, sizeof(ctx->m_iv)); + ctx->m_offset = 0; + + for (i = 0, k = 0; i < CIPHER_ROUNDS_BF + 2; ++i) + { + D = 0; + for (j = 0; j < 4; ++j) + { + D = ((D << 8) | pKeyData[k]); + k++; + if (k >= nKeyLen) + k = 0; + } + key->m_P[i] ^= D; + } + + rtl_secureZeroMemory(&DL, sizeof(DL)); + rtl_secureZeroMemory(&DR, sizeof(DR)); + + for (i = 0; i < CIPHER_ROUNDS_BF + 2; i += 2) + { + BF_encode(key, &DL, &DR); + key->m_P[i ] = DL; + key->m_P[i + 1] = DR; + } + + for (i = 0; i < 4; ++i) + { + for (k = 0; k < 256; k += 2) + { + BF_encode(key, &DL, &DR); + key->m_S[i][k ] = DL; + key->m_S[i][k + 1] = DR; + } + } + + if (pArgData && nArgLen) + { + nArgLen = std::min<sal_Size>(nArgLen, 8); + if (eMode == rtl_Cipher_ModeStream) + { + memcpy(ctx->m_iv.m_byte, pArgData, nArgLen); + } + else + { + RTL_CIPHER_NTOHL64 (pArgData, DL, DR, nArgLen); + ctx->m_iv.m_long[0] = DL; + ctx->m_iv.m_long[1] = DR; + } + } + + return rtl_Cipher_E_None; +} +#endif + +static rtlCipherError BF_update( + CipherContextBF *ctx, + rtlCipherMode eMode, + rtlCipherDirection eDirection, + const sal_uInt8 *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) +{ + /* Check arguments. */ + if (!pData || !pBuffer) + return rtl_Cipher_E_Argument; + + if ((nDatLen <= 0) || (nDatLen > nBufLen)) + return rtl_Cipher_E_BufferSize; + + /* Update. */ +#if defined LIBO_CIPHER_OPENSSL_BACKEND + assert(eMode == rtl_Cipher_ModeStream); + (void) eMode; + (void) eDirection; + while (nDatLen > o3tl::make_unsigned(std::numeric_limits<int>::max())) { + int outl; + if (EVP_CipherUpdate(ctx->m_context, pBuffer, &outl, pData, std::numeric_limits<int>::max()) + == 0) + { + return rtl_Cipher_E_Unknown; + } + assert(outl == std::numeric_limits<int>::max()); + pData += std::numeric_limits<int>::max(); + nDatLen -= std::numeric_limits<int>::max(); + pBuffer += std::numeric_limits<int>::max(); + } + int outl; + if (EVP_CipherUpdate(ctx->m_context, pBuffer, &outl, pData, static_cast<int>(nDatLen)) == 0) + { + return rtl_Cipher_E_Unknown; + } + assert(outl == static_cast<int>(nDatLen)); + // A final call to EVP_CipherFinal_ex is intentionally missing; it wouldn't fit the rtl/cipher.h + // interface, and is hopefully not needed, as each individual Blowfish CFB update step doesn't + // hold back any data that would need to be finally flushed. +#else + if (eMode == rtl_Cipher_ModeECB) + { + /* Block mode. */ + while (nDatLen > 8) + { + BF_updateECB(ctx, eDirection, pData, pBuffer, 8); + nDatLen -= 8; + pData += 8; + pBuffer += 8; + } + BF_updateECB(ctx, eDirection, pData, pBuffer, nDatLen); + } + else if (eMode == rtl_Cipher_ModeCBC) + { + /* Block mode. */ + while (nDatLen > 8) + { + BF_updateCBC (ctx, eDirection, pData, pBuffer, 8); + nDatLen -= 8; + pData += 8; + pBuffer += 8; + } + BF_updateCBC (ctx, eDirection, pData, pBuffer, nDatLen); + } + else + { + /* Stream mode. */ + while (nDatLen > 0) + { + BF_updateCFB (ctx, eDirection, pData, pBuffer); + nDatLen -= 1; + pData += 1; + pBuffer += 1; + } + } +#endif + return rtl_Cipher_E_None; +} + +#if !defined LIBO_CIPHER_OPENSSL_BACKEND +static void BF_updateECB( + CipherContextBF *ctx, + rtlCipherDirection direction, + const sal_uInt8 *pData, + sal_uInt8 *pBuffer, + sal_Size nLength) +{ + CipherKeyBF *key; + sal_uInt32 DL, DR; + + key = &(ctx->m_key); + if (direction == rtl_Cipher_DirectionEncode) + { + RTL_CIPHER_NTOHL64(pData, DL, DR, nLength); + + BF_encode(key, &DL, &DR); + + RTL_CIPHER_HTONL(DL, pBuffer); + RTL_CIPHER_HTONL(DR, pBuffer); + } + else + { + RTL_CIPHER_NTOHL(pData, DL); + RTL_CIPHER_NTOHL(pData, DR); + + BF_decode(key, &DL, &DR); + + RTL_CIPHER_HTONL64(DL, DR, pBuffer, nLength); + } + rtl_secureZeroMemory(&DL, sizeof(DL)); + rtl_secureZeroMemory(&DR, sizeof(DR)); +} + +static void BF_updateCBC( + CipherContextBF *ctx, + rtlCipherDirection direction, + const sal_uInt8 *pData, + sal_uInt8 *pBuffer, + sal_Size nLength) +{ + CipherKeyBF *key; + sal_uInt32 DL, DR; + + key = &(ctx->m_key); + if (direction == rtl_Cipher_DirectionEncode) + { + RTL_CIPHER_NTOHL64(pData, DL, DR, nLength); + + DL ^= ctx->m_iv.m_long[0]; + DR ^= ctx->m_iv.m_long[1]; + + BF_encode(key, &DL, &DR); + + ctx->m_iv.m_long[0] = DL; + ctx->m_iv.m_long[1] = DR; + + RTL_CIPHER_HTONL(DL, pBuffer); + RTL_CIPHER_HTONL(DR, pBuffer); + } + else + { + sal_uInt32 IVL, IVR; + + RTL_CIPHER_NTOHL(pData, DL); + RTL_CIPHER_NTOHL(pData, DR); + + IVL = DL; + IVR = DR; + + BF_decode(key, &DL, &DR); + + DL ^= ctx->m_iv.m_long[0]; + DR ^= ctx->m_iv.m_long[1]; + + ctx->m_iv.m_long[0] = IVL; + ctx->m_iv.m_long[1] = IVR; + + RTL_CIPHER_HTONL64(DL, DR, pBuffer, nLength); + } + rtl_secureZeroMemory(&DL, sizeof(DL)); + rtl_secureZeroMemory(&DR, sizeof(DR)); +} + +static void BF_updateCFB( + CipherContextBF *ctx, + rtlCipherDirection direction, + const sal_uInt8 *pData, + sal_uInt8 *pBuffer) +{ + sal_uInt8 *iv; + sal_uInt32 k; + + iv = ctx->m_iv.m_byte; + k = ctx->m_offset; + + if (k == 0) + { + sal_uInt32 IVL, IVR; + + RTL_CIPHER_NTOHL64(iv, IVL, IVR, 8); + BF_encode(&(ctx->m_key), &IVL, &IVR); + RTL_CIPHER_HTONL64(IVL, IVR, iv, 8); + + rtl_secureZeroMemory(&IVL, sizeof(IVL)); + rtl_secureZeroMemory(&IVR, sizeof(IVR)); + } + + if (direction == rtl_Cipher_DirectionEncode) + { + iv[k] ^= *pData; + *pBuffer = iv[k]; + } + else + { + sal_uInt8 c = iv[k]; + iv[k] = *pData; + *pBuffer = *pData ^ c; + } + + ctx->m_offset = ((k + 1) & 0x07); + iv = nullptr; +} + +static void BF_encode( + CipherKeyBF *key, sal_uInt32 *xl, sal_uInt32 *xr) +{ + sal_uInt32 t, XL, XR; + sal_uInt16 i; + + XL = *xl; + XR = *xr; + + for (i = 0; i < CIPHER_ROUNDS_BF; ++i) + { + XL ^= key->m_P[i]; + XR ^= BF (key, XL); + + t = XL; + XL = XR; + XR = t; + } + + t = XL; + XL = XR; + XR = t; + + XR ^= key->m_P[CIPHER_ROUNDS_BF ]; + XL ^= key->m_P[CIPHER_ROUNDS_BF + 1]; + + *xl = XL; + *xr = XR; + +} + +static void BF_decode( + CipherKeyBF *key, sal_uInt32 *xl, sal_uInt32 *xr) +{ + sal_uInt32 t, XL, XR; + sal_uInt16 i; + + XL = *xl; + XR = *xr; + + for (i = CIPHER_ROUNDS_BF + 1; i > 1; --i) + { + XL ^= key->m_P[i]; + XR ^= BF (key, XL); + + t = XL; + XL = XR; + XR = t; + } + + t = XL; + XL = XR; + XR = t; + + XR ^= key->m_P[1]; + XL ^= key->m_P[0]; + + *xl = XL; + *xr = XR; + +} + +static sal_uInt32 BF(CipherKeyBF *key, sal_uInt32 x) +{ + sal_uInt16 a, b, c, d; + sal_uInt32 y; + + d = static_cast<sal_uInt16>(x & 0x00ff); + x >>= 8; + c = static_cast<sal_uInt16>(x & 0x00ff); + x >>= 8; + b = static_cast<sal_uInt16>(x & 0x00ff); + x >>= 8; + a = static_cast<sal_uInt16>(x & 0x00ff); + + y = key->m_S[0][a]; + y += key->m_S[1][b]; + y ^= key->m_S[2][c]; + y += key->m_S[3][d]; + + return y; +} +#endif + +/** + rtl_cipherBF (Blowfish) implementation. + + Reference: Bruce Schneier: Applied Cryptography, 2nd edition, ch. 14.3 +*/ +rtlCipher SAL_CALL rtl_cipher_createBF(rtlCipherMode Mode) SAL_THROW_EXTERN_C() +{ + CipherBF_Impl *pImpl = nullptr; + + if (Mode == rtl_Cipher_ModeInvalid) + return nullptr; +#if defined LIBO_CIPHER_OPENSSL_BACKEND + if (Mode != rtl_Cipher_ModeStream) { + // Cannot easily support ModeECB and ModeCBC, and they aren't used in the LO code at least: + return nullptr; + } +#endif + + pImpl = static_cast<CipherBF_Impl*>(rtl_allocateZeroMemory(sizeof (CipherBF_Impl))); + if (pImpl) + { + pImpl->m_cipher.m_algorithm = rtl_Cipher_AlgorithmBF; + pImpl->m_cipher.m_direction = rtl_Cipher_DirectionInvalid; + pImpl->m_cipher.m_mode = Mode; + + pImpl->m_cipher.m_init = rtl_cipher_initBF; + pImpl->m_cipher.m_encode = rtl_cipher_encodeBF; + pImpl->m_cipher.m_decode = rtl_cipher_decodeBF; + pImpl->m_cipher.m_delete = rtl_cipher_destroyBF; + } + return static_cast<rtlCipher>(pImpl); +} + +rtlCipherError SAL_CALL rtl_cipher_initBF( + rtlCipher Cipher, + rtlCipherDirection Direction, + const sal_uInt8 *pKeyData, sal_Size nKeyLen, + const sal_uInt8 *pArgData, sal_Size nArgLen) SAL_THROW_EXTERN_C() +{ + CipherBF_Impl *pImpl = static_cast<CipherBF_Impl*>(Cipher); + + if (!pImpl || !pKeyData) + return rtl_Cipher_E_Argument; + + if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmBF) + return rtl_Cipher_E_Algorithm; + + if (Direction != rtl_Cipher_DirectionInvalid) + pImpl->m_cipher.m_direction = Direction; + else + return rtl_Cipher_E_Direction; + +#if defined LIBO_CIPHER_OPENSSL_BACKEND + if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionBoth) { + // Cannot easily support DirectionBoth, and it isn't used in the LO code at least: + return rtl_Cipher_E_Direction; + } + if (nKeyLen > o3tl::make_unsigned(std::numeric_limits<int>::max())) { + return rtl_Cipher_E_BufferSize; + } + if (pImpl->m_context.m_context != nullptr) { + EVP_CIPHER_CTX_free(pImpl->m_context.m_context); + } + pImpl->m_context.m_context = EVP_CIPHER_CTX_new(); + if (pImpl->m_context.m_context == nullptr) { + return rtl_Cipher_E_Memory; + } + unsigned char iv[8]; + auto const n = std::min(nArgLen, sal_Size(8)); + std::memcpy(iv, pArgData, n); + std::memset(iv + n, 0, 8 - n); + if (EVP_CipherInit_ex( + pImpl->m_context.m_context, EVP_bf_cfb(), nullptr, nullptr, iv, + pImpl->m_cipher.m_direction == rtl_Cipher_DirectionDecode ? 0 : 1) + == 0) + { + return rtl_Cipher_E_Unknown; + } + if (EVP_CIPHER_CTX_set_key_length(pImpl->m_context.m_context, static_cast<int>(nKeyLen)) == 0) { + return rtl_Cipher_E_Unknown; + } + if (EVP_CipherInit_ex(pImpl->m_context.m_context, nullptr, nullptr, pKeyData, nullptr, -1) == 0) + { + return rtl_Cipher_E_Unknown; + } + return rtl_Cipher_E_None; +#else + return BF_init( + &(pImpl->m_context), pImpl->m_cipher.m_mode, + pKeyData, nKeyLen, pArgData, nArgLen); +#endif +} + +rtlCipherError SAL_CALL rtl_cipher_encodeBF( + rtlCipher Cipher, + const void *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C() +{ + CipherBF_Impl *pImpl = static_cast<CipherBF_Impl*>(Cipher); + if (!pImpl) + return rtl_Cipher_E_Argument; + + if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmBF) + return rtl_Cipher_E_Algorithm; + + if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid) + return rtl_Cipher_E_Direction; + + if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionDecode) + return rtl_Cipher_E_Direction; + + return BF_update( + &(pImpl->m_context), pImpl->m_cipher.m_mode, + rtl_Cipher_DirectionEncode, + static_cast<const sal_uInt8*>(pData), nDatLen, pBuffer, nBufLen); +} + +rtlCipherError SAL_CALL rtl_cipher_decodeBF( + rtlCipher Cipher, + const void *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C() +{ + CipherBF_Impl *pImpl = static_cast<CipherBF_Impl*>(Cipher); + if (!pImpl) + return rtl_Cipher_E_Argument; + + if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmBF) + return rtl_Cipher_E_Algorithm; + + if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid) + return rtl_Cipher_E_Direction; + + if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionEncode) + return rtl_Cipher_E_Direction; + + return BF_update( + &(pImpl->m_context), pImpl->m_cipher.m_mode, + rtl_Cipher_DirectionDecode, + static_cast<const sal_uInt8*>(pData), nDatLen, pBuffer, nBufLen); +} + +void SAL_CALL rtl_cipher_destroyBF(rtlCipher Cipher) SAL_THROW_EXTERN_C() +{ + CipherBF_Impl *pImpl = static_cast<CipherBF_Impl*>(Cipher); + if (!pImpl) + return; + + if (pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmBF) + { +#if defined LIBO_CIPHER_OPENSSL_BACKEND + if (pImpl->m_context.m_context != nullptr) { + EVP_CIPHER_CTX_free(pImpl->m_context.m_context); + } +#endif + rtl_freeZeroMemory(pImpl, sizeof(CipherBF_Impl)); + } + else + free(pImpl); +} + +#if !defined LIBO_CIPHER_OPENSSL_BACKEND +#define CIPHER_CBLOCK_ARCFOUR 256 +#endif + +namespace { + +struct ContextARCFOUR_Impl +{ +#if defined LIBO_CIPHER_OPENSSL_BACKEND + EVP_CIPHER_CTX * m_context; +#else + unsigned int m_S[CIPHER_CBLOCK_ARCFOUR]; + unsigned int m_X, m_Y; +#endif +}; + +struct CipherARCFOUR_Impl +{ + Cipher_Impl m_cipher; + ContextARCFOUR_Impl m_context; +}; + +} + +static rtlCipherError rtl_cipherARCFOUR_update_Impl( + ContextARCFOUR_Impl *ctx, + const sal_uInt8 *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen); + +static rtlCipherError rtl_cipherARCFOUR_init_Impl( + ContextARCFOUR_Impl *ctx, + const sal_uInt8 *pKeyData, sal_Size nKeyLen) +{ +#if defined LIBO_CIPHER_OPENSSL_BACKEND + if (nKeyLen > o3tl::make_unsigned(std::numeric_limits<int>::max())) { + return rtl_Cipher_E_BufferSize; + } + if (ctx->m_context != nullptr) { + EVP_CIPHER_CTX_free(ctx->m_context); + } + ctx->m_context = EVP_CIPHER_CTX_new(); + if (ctx->m_context == nullptr) { + return rtl_Cipher_E_Memory; + } + if (EVP_CipherInit_ex(ctx->m_context, EVP_rc4(), nullptr, nullptr, nullptr, 0) == 0) { + // RC4 en- and decryption is identical, so we can use 0=decrypt regardless of direction, + // and thus also support rtl_Cipher_DirectionBoth + return rtl_Cipher_E_Unknown; + } + if (EVP_CIPHER_CTX_set_key_length(ctx->m_context, static_cast<int>(nKeyLen)) == 0) { + return rtl_Cipher_E_Unknown; + } + if (EVP_CipherInit_ex(ctx->m_context, nullptr, nullptr, pKeyData, nullptr, -1) == 0) { + return rtl_Cipher_E_Unknown; + } +#else + unsigned int K[CIPHER_CBLOCK_ARCFOUR]; + unsigned int *L, *S; + unsigned int x, y; + sal_Size n, k; + + S = &(ctx->m_S[0]); + + /* Initialize S linearly. */ + for (x = 0; x < CIPHER_CBLOCK_ARCFOUR; x++) + S[x] = x; + + /* Initialize K with key, repeat key as necessary. */ + for (L = K, n = CIPHER_CBLOCK_ARCFOUR; n > nKeyLen; n -= nKeyLen) + { + for (k = 0; k < nKeyLen; k++) + { + L[k] = pKeyData[k]; + } + + L += nKeyLen; + } + + for (k = 0; k < n; k++) + { + L[k] = pKeyData[k]; + } + + /* Initialize S with K. */ + for (x = 0, y = 0; x < CIPHER_CBLOCK_ARCFOUR; x++) + { + y = (y + S[x] + K[x]) % CIPHER_CBLOCK_ARCFOUR; + /* swap S[x] and S[y] */ + unsigned int t = S[x]; + S[x] = S[y]; + S[y] = t; + } + + /* Initialize counters X and Y. */ + ctx->m_X = 0; + ctx->m_Y = 0; +#endif + + return rtl_Cipher_E_None; +} + +static rtlCipherError rtl_cipherARCFOUR_update_Impl( + ContextARCFOUR_Impl *ctx, + const sal_uInt8 *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) +{ + /* Check arguments. */ + if (!pData || !pBuffer) + return rtl_Cipher_E_Argument; + + if ((0 >= nDatLen) || (nDatLen > nBufLen)) + return rtl_Cipher_E_BufferSize; + +#if defined LIBO_CIPHER_OPENSSL_BACKEND + while (nDatLen > o3tl::make_unsigned(std::numeric_limits<int>::max())) { + int outl; + if (EVP_CipherUpdate(ctx->m_context, pBuffer, &outl, pData, std::numeric_limits<int>::max()) + == 0) + { + return rtl_Cipher_E_Unknown; + } + assert(outl == std::numeric_limits<int>::max()); + pData += std::numeric_limits<int>::max(); + nDatLen -= std::numeric_limits<int>::max(); + pBuffer += std::numeric_limits<int>::max(); + } + int outl; + if (EVP_CipherUpdate(ctx->m_context, pBuffer, &outl, pData, static_cast<int>(nDatLen)) == 0) { + return rtl_Cipher_E_Unknown; + } + assert(outl == static_cast<int>(nDatLen)); + // A final call to EVP_CipherFinal_ex is intentionally missing; it wouldn't fit the rtl/cipher.h + // interface, and is hopefully not needed, as each individual RC4 update step doesn't hold back + // any data that would need to be finally flushed. +#else + unsigned int *S; + sal_Size k; + + /* Update. */ + S = &(ctx->m_S[0]); + for (k = 0; k < nDatLen; k++) + { + /* Update counters X and Y. */ + unsigned int x = ctx->m_X; + unsigned int y = ctx->m_Y; + x = (x + 1 ) % CIPHER_CBLOCK_ARCFOUR; + y = (y + S[x]) % CIPHER_CBLOCK_ARCFOUR; + ctx->m_X = x; + ctx->m_Y = y; + + /* Swap S[x] and S[y]. */ + unsigned int t = S[x]; + S[x] = S[y]; + S[y] = t; + + /* Evaluate next key byte S[t]. */ + t = (S[x] + S[y]) % CIPHER_CBLOCK_ARCFOUR; + pBuffer[k] = pData[k] ^ static_cast<sal_uInt8>(S[t] & 0xff); + } +#endif + + return rtl_Cipher_E_None; +} + +/** + rtl_cipher_ARCFOUR (RC4) implementation. + + Reference: Bruce Schneier: Applied Cryptography, 2nd edition, ch. 17.1 +*/ +rtlCipher SAL_CALL rtl_cipher_createARCFOUR(rtlCipherMode Mode) + SAL_THROW_EXTERN_C() +{ + CipherARCFOUR_Impl *pImpl = nullptr; + + if (Mode != rtl_Cipher_ModeStream) + return nullptr; + + pImpl = static_cast<CipherARCFOUR_Impl*>(rtl_allocateZeroMemory(sizeof(CipherARCFOUR_Impl))); + if (pImpl) + { + pImpl->m_cipher.m_algorithm = rtl_Cipher_AlgorithmARCFOUR; + pImpl->m_cipher.m_direction = rtl_Cipher_DirectionInvalid; + pImpl->m_cipher.m_mode = rtl_Cipher_ModeStream; + + pImpl->m_cipher.m_init = rtl_cipher_initARCFOUR; + pImpl->m_cipher.m_encode = rtl_cipher_encodeARCFOUR; + pImpl->m_cipher.m_decode = rtl_cipher_decodeARCFOUR; + pImpl->m_cipher.m_delete = rtl_cipher_destroyARCFOUR; + } + + return static_cast<rtlCipher>(pImpl); +} + +rtlCipherError SAL_CALL rtl_cipher_initARCFOUR( + rtlCipher Cipher, + rtlCipherDirection Direction, + const sal_uInt8 *pKeyData, sal_Size nKeyLen, + SAL_UNUSED_PARAMETER const sal_uInt8 *, SAL_UNUSED_PARAMETER sal_Size) + SAL_THROW_EXTERN_C() +{ + CipherARCFOUR_Impl *pImpl = static_cast<CipherARCFOUR_Impl*>(Cipher); + + if (!pImpl || !pKeyData) + return rtl_Cipher_E_Argument; + + if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmARCFOUR) + return rtl_Cipher_E_Algorithm; + + if (Direction != rtl_Cipher_DirectionInvalid) + pImpl->m_cipher.m_direction = Direction; + else + return rtl_Cipher_E_Direction; + + return rtl_cipherARCFOUR_init_Impl(&(pImpl->m_context), pKeyData, nKeyLen); +} + +rtlCipherError SAL_CALL rtl_cipher_encodeARCFOUR( + rtlCipher Cipher, + const void *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C() +{ + CipherARCFOUR_Impl *pImpl = static_cast<CipherARCFOUR_Impl*>(Cipher); + if (!pImpl) + return rtl_Cipher_E_Argument; + + if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmARCFOUR) + return rtl_Cipher_E_Algorithm; + + if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid) + return rtl_Cipher_E_Direction; + + return rtl_cipherARCFOUR_update_Impl( + &(pImpl->m_context), + static_cast<const sal_uInt8*>(pData), nDatLen, pBuffer, nBufLen); +} + +rtlCipherError SAL_CALL rtl_cipher_decodeARCFOUR( + rtlCipher Cipher, + const void *pData, sal_Size nDatLen, + sal_uInt8 *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C() +{ + CipherARCFOUR_Impl *pImpl = static_cast<CipherARCFOUR_Impl*>(Cipher); + if (!pImpl) + return rtl_Cipher_E_Argument; + + if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmARCFOUR) + return rtl_Cipher_E_Algorithm; + + if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid) + return rtl_Cipher_E_Direction; + + return rtl_cipherARCFOUR_update_Impl( + &(pImpl->m_context), + static_cast<const sal_uInt8*>(pData), nDatLen, pBuffer, nBufLen); +} + +void SAL_CALL rtl_cipher_destroyARCFOUR(rtlCipher Cipher) SAL_THROW_EXTERN_C() +{ + CipherARCFOUR_Impl *pImpl = static_cast<CipherARCFOUR_Impl*>(Cipher); + if (!pImpl) + return; + + if (pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmARCFOUR) + { +#if defined LIBO_CIPHER_OPENSSL_BACKEND + if (pImpl->m_context.m_context != nullptr) { + EVP_CIPHER_CTX_free(pImpl->m_context.m_context); + } +#endif + rtl_freeZeroMemory(pImpl, sizeof(CipherARCFOUR_Impl)); + } + else + free(pImpl); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |