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Require libgcrypt >= 1.6.0.

Browse Source 
Remove our own Salsa20 implementation as libgcrypt ships one
with that version.
This commit is contained in:
Felix Geyer 2015-07-22 23:40:26 +02:00
parent d81565df55
commit 60daa2b41b
11 changed files with 1 additions and 1109 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
CMakeLists.txt
View File

@ -172,11 +172,7 @@ set(CMAKE_AUTOMOC ON)
# Make sure we don't enable asserts there.
set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS_NONE QT_NO_DEBUG)
find_package(Gcrypt REQUIRED)
if(NOT (${GCRYPT_VERSION_STRING} VERSION_LESS "1.6.0"))
message(STATUS "Gcrypt ${GCRYPT_VERSION_STRING} supports the SALSA20 cipher")
set(GCRYPT_HAS_SALSA20 1)
endif()
find_package(Gcrypt 1.6.0 REQUIRED)
find_package(ZLIB REQUIRED)

12
src/CMakeLists.txt
View File

@ -126,18 +126,6 @@ set(keepassx_SOURCES
streams/SymmetricCipherStream.cpp
)
if(NOT GCRYPT_HAS_SALSA20)
set(keepassx_SOURCES
${keepassx_SOURCES}
crypto/salsa20/ecrypt-config.h
crypto/salsa20/ecrypt-machine.h
crypto/salsa20/ecrypt-portable.h
crypto/salsa20/ecrypt-sync.h
crypto/salsa20/salsa20.c
crypto/SymmetricCipherSalsa20.cpp
)
endif()
set(keepassx_SOURCES_MAINEXE
main.cpp
)

2
src/config-keepassx.h.cmake
View File

@ -16,6 +16,4 @@
#cmakedefine HAVE_RLIMIT_CORE 1
#cmakedefine HAVE_PT_DENY_ATTACH 1
#cmakedefine GCRYPT_HAS_SALSA20
#endif // KEEPASSX_CONFIG_KEEPASSX_H

41
src/crypto/Crypto.cpp
View File

@ -28,43 +28,6 @@
bool Crypto::m_initalized(false);
QString Crypto::m_errorStr;
#if !defined(GCRYPT_VERSION_NUMBER) || (GCRYPT_VERSION_NUMBER < 0x010600)
static int gcry_qt_mutex_init(void** p_sys)
{
*p_sys = new QMutex();
return 0;
}
static int gcry_qt_mutex_destroy(void** p_sys)
{
delete reinterpret_cast<QMutex*>(*p_sys);
return 0;
}
static int gcry_qt_mutex_lock(void** p_sys)
{
reinterpret_cast<QMutex*>(*p_sys)->lock();
return 0;
}
static int gcry_qt_mutex_unlock(void** p_sys)
{
reinterpret_cast<QMutex*>(*p_sys)->unlock();
return 0;
}
static const struct gcry_thread_cbs gcry_threads_qt =
{
GCRY_THREAD_OPTION_USER,
0,
gcry_qt_mutex_init,
gcry_qt_mutex_destroy,
gcry_qt_mutex_lock,
gcry_qt_mutex_unlock,
0, 0, 0, 0, 0, 0, 0, 0
};
#endif
Crypto::Crypto()
{
}
@ -76,10 +39,6 @@ bool Crypto::init()
return true;
}
// libgcrypt >= 1.6 doesn't allow custom thread callbacks anymore.
#if !defined(GCRYPT_VERSION_NUMBER) || (GCRYPT_VERSION_NUMBER < 0x010600)
gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_qt);
#endif
gcry_check_version(0);
gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);

8
src/crypto/SymmetricCipher.cpp
View File

@ -19,7 +19,6 @@
#include "config-keepassx.h"
#include "crypto/SymmetricCipherGcrypt.h"
#include "crypto/SymmetricCipherSalsa20.h"
SymmetricCipher::SymmetricCipher(SymmetricCipher::Algorithm algo, SymmetricCipher::Mode mode,
SymmetricCipher::Direction direction)
@ -61,16 +60,9 @@ SymmetricCipherBackend* SymmetricCipher::createBackend(SymmetricCipher::Algorith
switch (algo) {
case SymmetricCipher::Aes256:
case SymmetricCipher::Twofish:
#if defined(GCRYPT_HAS_SALSA20)
case SymmetricCipher::Salsa20:
#endif
return new SymmetricCipherGcrypt(algo, mode, direction);
#if !defined(GCRYPT_HAS_SALSA20)
case SymmetricCipher::Salsa20:
return new SymmetricCipherSalsa20(algo, mode, direction);
#endif
default:
Q_ASSERT(false);
return Q_NULLPTR;

2
src/crypto/SymmetricCipherGcrypt.cpp
View File

@ -44,10 +44,8 @@ int SymmetricCipherGcrypt::gcryptAlgo(SymmetricCipher::Algorithm algo)
case SymmetricCipher::Twofish:
return GCRY_CIPHER_TWOFISH;
#ifdef GCRYPT_HAS_SALSA20
case SymmetricCipher::Salsa20:
return GCRY_CIPHER_SALSA20;
#endif
default:
Q_ASSERT(false);

260
src/crypto/salsa20/ecrypt-config.h
View File

@ -1,260 +0,0 @@
/* ecrypt-config.h */
/* *** Normally, it should not be necessary to edit this file. *** */
#ifndef ECRYPT_CONFIG
#define ECRYPT_CONFIG
/* ------------------------------------------------------------------------- */
/* Guess the endianness of the target architecture. */
#include <QtGlobal>
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
#define ECRYPT_LITTLE_ENDIAN
#elif Q_BYTE_ORDER == Q_BIG_ENDIAN
#define ECRYPT_BIG_ENDIAN
#else
#define ECRYPT_UNKNOWN
#endif
/* ------------------------------------------------------------------------- */
/*
* Find minimal-width types to store 8-bit, 16-bit, 32-bit, and 64-bit
* integers.
*
* Note: to enable 64-bit types on 32-bit compilers, it might be
* necessary to switch from ISO C90 mode to ISO C99 mode (e.g., gcc
* -std=c99), or to allow compiler-specific extensions.
*/
#include <limits.h>
/* --- check char --- */
#if (UCHAR_MAX / 0xFU > 0xFU)
#ifndef I8T
#define I8T char
#define U8C(v) (v##U)
#if (UCHAR_MAX == 0xFFU)
#define ECRYPT_I8T_IS_BYTE
#endif
#endif
#if (UCHAR_MAX / 0xFFU > 0xFFU)
#ifndef I16T
#define I16T char
#define U16C(v) (v##U)
#endif
#if (UCHAR_MAX / 0xFFFFU > 0xFFFFU)
#ifndef I32T
#define I32T char
#define U32C(v) (v##U)
#endif
#if (UCHAR_MAX / 0xFFFFFFFFU > 0xFFFFFFFFU)
#ifndef I64T
#define I64T char
#define U64C(v) (v##U)
#define ECRYPT_NATIVE64
#endif
#endif
#endif
#endif
#endif
/* --- check short --- */
#if (USHRT_MAX / 0xFU > 0xFU)
#ifndef I8T
#define I8T short
#define U8C(v) (v##U)
#if (USHRT_MAX == 0xFFU)
#define ECRYPT_I8T_IS_BYTE
#endif
#endif
#if (USHRT_MAX / 0xFFU > 0xFFU)
#ifndef I16T
#define I16T short
#define U16C(v) (v##U)
#endif
#if (USHRT_MAX / 0xFFFFU > 0xFFFFU)
#ifndef I32T
#define I32T short
#define U32C(v) (v##U)
#endif
#if (USHRT_MAX / 0xFFFFFFFFU > 0xFFFFFFFFU)
#ifndef I64T
#define I64T short
#define U64C(v) (v##U)
#define ECRYPT_NATIVE64
#endif
#endif
#endif
#endif
#endif
/* --- check int --- */
#if (UINT_MAX / 0xFU > 0xFU)
#ifndef I8T
#define I8T int
#define U8C(v) (v##U)
#if (ULONG_MAX == 0xFFU)
#define ECRYPT_I8T_IS_BYTE
#endif
#endif
#if (UINT_MAX / 0xFFU > 0xFFU)
#ifndef I16T
#define I16T int
#define U16C(v) (v##U)
#endif
#if (UINT_MAX / 0xFFFFU > 0xFFFFU)
#ifndef I32T
#define I32T int
#define U32C(v) (v##U)
#endif
#if (UINT_MAX / 0xFFFFFFFFU > 0xFFFFFFFFU)
#ifndef I64T
#define I64T int
#define U64C(v) (v##U)
#define ECRYPT_NATIVE64
#endif
#endif
#endif
#endif
#endif
/* --- check long --- */
#if (ULONG_MAX / 0xFUL > 0xFUL)
#ifndef I8T
#define I8T long
#define U8C(v) (v##UL)
#if (ULONG_MAX == 0xFFUL)
#define ECRYPT_I8T_IS_BYTE
#endif
#endif
#if (ULONG_MAX / 0xFFUL > 0xFFUL)
#ifndef I16T
#define I16T long
#define U16C(v) (v##UL)
#endif
#if (ULONG_MAX / 0xFFFFUL > 0xFFFFUL)
#ifndef I32T
#define I32T long
#define U32C(v) (v##UL)
#endif
#if (ULONG_MAX / 0xFFFFFFFFUL > 0xFFFFFFFFUL)
#ifndef I64T
#define I64T long
#define U64C(v) (v##UL)
#define ECRYPT_NATIVE64
#endif
#endif
#endif
#endif
#endif
/* --- check long long --- */
#ifdef ULLONG_MAX
#if (ULLONG_MAX / 0xFULL > 0xFULL)
#ifndef I8T
#define I8T long long
#define U8C(v) (v##ULL)
#if (ULLONG_MAX == 0xFFULL)
#define ECRYPT_I8T_IS_BYTE
#endif
#endif
#if (ULLONG_MAX / 0xFFULL > 0xFFULL)
#ifndef I16T
#define I16T long long
#define U16C(v) (v##ULL)
#endif
#if (ULLONG_MAX / 0xFFFFULL > 0xFFFFULL)
#ifndef I32T
#define I32T long long
#define U32C(v) (v##ULL)
#endif
#if (ULLONG_MAX / 0xFFFFFFFFULL > 0xFFFFFFFFULL)
#ifndef I64T
#define I64T long long
#define U64C(v) (v##ULL)
#endif
#endif
#endif
#endif
#endif
#endif
/* --- check __int64 --- */
#if !defined(__STDC__) && defined(_UI64_MAX)
#ifndef I64T
#define I64T __int64
#define U64C(v) (v##ui64)
#endif
#endif
/* ------------------------------------------------------------------------- */
/* find the largest type on this platform (used for alignment) */
#if defined(__SSE__) || (defined(_MSC_VER) && (_MSC_VER >= 1300))
#include <xmmintrin.h>
#define MAXT __m128
#elif defined(__MMX__)
#include <mmintrin.h>
#define MAXT __m64
#elif defined(__ALTIVEC__)
#define MAXT __vector int
#else
#define MAXT long
#endif
/* ------------------------------------------------------------------------- */
#endif

49
src/crypto/salsa20/ecrypt-machine.h
View File

@ -1,49 +0,0 @@
/* ecrypt-machine.h */
/*
* This file is included by 'ecrypt-portable.h'. It allows to override
* the default macros for specific platforms. Please carefully check
* the machine code generated by your compiler (with optimisations
* turned on) before deciding to edit this file.
*/
/* ------------------------------------------------------------------------- */
#if (defined(ECRYPT_DEFAULT_ROT) && !defined(ECRYPT_MACHINE_ROT))
#define ECRYPT_MACHINE_ROT
#if (defined(WIN32) && defined(_MSC_VER))
#undef ROTL32
#undef ROTR32
#undef ROTL64
#undef ROTR64
#include <stdlib.h>
#pragma intrinsic(_lrotl) /* compile rotations "inline" */
#pragma intrinsic(_lrotr)
#define ROTL32(v, n) _lrotl(v, n)
#define ROTR32(v, n) _lrotr(v, n)
#define ROTL64(v, n) _rotl64(v, n)
#define ROTR64(v, n) _rotr64(v, n)
#endif
#endif
/* ------------------------------------------------------------------------- */
#if (defined(ECRYPT_DEFAULT_SWAP) && !defined(ECRYPT_MACHINE_SWAP))
#define ECRYPT_MACHINE_SWAP
/*
* If you want to overwrite the default swap macros, put it here. And so on.
*/
#endif
/* ------------------------------------------------------------------------- */

310
src/crypto/salsa20/ecrypt-portable.h
View File

@ -1,310 +0,0 @@
/* ecrypt-portable.h */
/*
* WARNING: the conversions defined below are implemented as macros,
* and should be used carefully. They should NOT be used with
* parameters which perform some action. E.g., the following two lines
* are not equivalent:
*
* 1) ++x; y = ROTL32(x, n);
* 2) y = ROTL32(++x, n);
*/
/*
* *** Please do not edit this file. ***
*
* The default macros can be overridden for specific architectures by
* editing 'ecrypt-machine.h'.
*/
#ifndef ECRYPT_PORTABLE
#define ECRYPT_PORTABLE
#include "ecrypt-config.h"
/* ------------------------------------------------------------------------- */
/*
* The following types are defined (if available):
*
* u8: unsigned integer type, at least 8 bits
* u16: unsigned integer type, at least 16 bits
* u32: unsigned integer type, at least 32 bits
* u64: unsigned integer type, at least 64 bits
*
* s8, s16, s32, s64 -> signed counterparts of u8, u16, u32, u64
*
* The selection of minimum-width integer types is taken care of by
* 'ecrypt-config.h'. Note: to enable 64-bit types on 32-bit
* compilers, it might be necessary to switch from ISO C90 mode to ISO
* C99 mode (e.g., gcc -std=c99).
*/
#ifdef I8T
typedef signed I8T s8;
typedef unsigned I8T u8;
#endif
#ifdef I16T
typedef signed I16T s16;
typedef unsigned I16T u16;
#endif
#ifdef I32T
typedef signed I32T s32;
typedef unsigned I32T u32;
#endif
#ifdef I64T
typedef signed I64T s64;
typedef unsigned I64T u64;
#endif
/*
* The following macros are used to obtain exact-width results.
*/
#define U8V(v) ((u8)(v) & U8C(0xFF))
#define U16V(v) ((u16)(v) & U16C(0xFFFF))
#define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF))
#define U64V(v) ((u64)(v) & U64C(0xFFFFFFFFFFFFFFFF))
/* ------------------------------------------------------------------------- */
/*
* The following macros return words with their bits rotated over n
* positions to the left/right.
*/
#define ECRYPT_DEFAULT_ROT
#define ROTL8(v, n) \
(U8V((v) << (n)) | ((v) >> (8 - (n))))
#define ROTL16(v, n) \
(U16V((v) << (n)) | ((v) >> (16 - (n))))
#define ROTL32(v, n) \
(U32V((v) << (n)) | ((v) >> (32 - (n))))
#define ROTL64(v, n) \
(U64V((v) << (n)) | ((v) >> (64 - (n))))
#define ROTR8(v, n) ROTL8(v, 8 - (n))
#define ROTR16(v, n) ROTL16(v, 16 - (n))
#define ROTR32(v, n) ROTL32(v, 32 - (n))
#define ROTR64(v, n) ROTL64(v, 64 - (n))
#include "ecrypt-machine.h"
/* ------------------------------------------------------------------------- */
/*
* The following macros return a word with bytes in reverse order.
*/
#define ECRYPT_DEFAULT_SWAP
#define SWAP16(v) \
ROTL16(v, 8)
#define SWAP32(v) \
((ROTL32(v, 8) & U32C(0x00FF00FF)) | \
(ROTL32(v, 24) & U32C(0xFF00FF00)))
#ifdef ECRYPT_NATIVE64
#define SWAP64(v) \
((ROTL64(v, 8) & U64C(0x000000FF000000FF)) | \
(ROTL64(v, 24) & U64C(0x0000FF000000FF00)) | \
(ROTL64(v, 40) & U64C(0x00FF000000FF0000)) | \
(ROTL64(v, 56) & U64C(0xFF000000FF000000)))
#else
#define SWAP64(v) \
(((u64)SWAP32(U32V(v)) << 32) | (u64)SWAP32(U32V(v >> 32)))
#endif
#include "ecrypt-machine.h"
#define ECRYPT_DEFAULT_WTOW
#ifdef ECRYPT_LITTLE_ENDIAN
#define U16TO16_LITTLE(v) (v)
#define U32TO32_LITTLE(v) (v)
#define U64TO64_LITTLE(v) (v)
#define U16TO16_BIG(v) SWAP16(v)
#define U32TO32_BIG(v) SWAP32(v)
#define U64TO64_BIG(v) SWAP64(v)
#endif
#ifdef ECRYPT_BIG_ENDIAN
#define U16TO16_LITTLE(v) SWAP16(v)
#define U32TO32_LITTLE(v) SWAP32(v)
#define U64TO64_LITTLE(v) SWAP64(v)
#define U16TO16_BIG(v) (v)
#define U32TO32_BIG(v) (v)
#define U64TO64_BIG(v) (v)
#endif
#include "ecrypt-machine.h"
/*
* The following macros load words from an array of bytes with
* different types of endianness, and vice versa.
*/
#define ECRYPT_DEFAULT_BTOW
#if (!defined(ECRYPT_UNKNOWN) && defined(ECRYPT_I8T_IS_BYTE))
#define U8TO16_LITTLE(p) U16TO16_LITTLE(((u16*)(p))[0])
#define U8TO32_LITTLE(p) U32TO32_LITTLE(((u32*)(p))[0])
#define U8TO64_LITTLE(p) U64TO64_LITTLE(((u64*)(p))[0])
#define U8TO16_BIG(p) U16TO16_BIG(((u16*)(p))[0])
#define U8TO32_BIG(p) U32TO32_BIG(((u32*)(p))[0])
#define U8TO64_BIG(p) U64TO64_BIG(((u64*)(p))[0])
#define U16TO8_LITTLE(p, v) (((u16*)(p))[0] = U16TO16_LITTLE(v))
#define U32TO8_LITTLE(p, v) (((u32*)(p))[0] = U32TO32_LITTLE(v))
#define U64TO8_LITTLE(p, v) (((u64*)(p))[0] = U64TO64_LITTLE(v))
#define U16TO8_BIG(p, v) (((u16*)(p))[0] = U16TO16_BIG(v))
#define U32TO8_BIG(p, v) (((u32*)(p))[0] = U32TO32_BIG(v))
#define U64TO8_BIG(p, v) (((u64*)(p))[0] = U64TO64_BIG(v))
#else
#define U8TO16_LITTLE(p) \
(((u16)((p)[0]) ) | \
((u16)((p)[1]) << 8))
#define U8TO32_LITTLE(p) \
(((u32)((p)[0]) ) | \
((u32)((p)[1]) << 8) | \
((u32)((p)[2]) << 16) | \
((u32)((p)[3]) << 24))
#ifdef ECRYPT_NATIVE64
#define U8TO64_LITTLE(p) \
(((u64)((p)[0]) ) | \
((u64)((p)[1]) << 8) | \
((u64)((p)[2]) << 16) | \
((u64)((p)[3]) << 24) | \
((u64)((p)[4]) << 32) | \
((u64)((p)[5]) << 40) | \
((u64)((p)[6]) << 48) | \
((u64)((p)[7]) << 56))
#else
#define U8TO64_LITTLE(p) \
((u64)U8TO32_LITTLE(p) | ((u64)U8TO32_LITTLE((p) + 4) << 32))
#endif
#define U8TO16_BIG(p) \
(((u16)((p)[0]) << 8) | \
((u16)((p)[1]) ))
#define U8TO32_BIG(p) \
(((u32)((p)[0]) << 24) | \
((u32)((p)[1]) << 16) | \
((u32)((p)[2]) << 8) | \
((u32)((p)[3]) ))
#ifdef ECRYPT_NATIVE64
#define U8TO64_BIG(p) \
(((u64)((p)[0]) << 56) | \
((u64)((p)[1]) << 48) | \
((u64)((p)[2]) << 40) | \
((u64)((p)[3]) << 32) | \
((u64)((p)[4]) << 24) | \
((u64)((p)[5]) << 16) | \
((u64)((p)[6]) << 8) | \
((u64)((p)[7]) ))
#else
#define U8TO64_BIG(p) \
(((u64)U8TO32_BIG(p) << 32) | (u64)U8TO32_BIG((p) + 4))
#endif
#define U16TO8_LITTLE(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
} while (0)
#define U32TO8_LITTLE(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
(p)[2] = U8V((v) >> 16); \
(p)[3] = U8V((v) >> 24); \
} while (0)
#ifdef ECRYPT_NATIVE64
#define U64TO8_LITTLE(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
(p)[2] = U8V((v) >> 16); \
(p)[3] = U8V((v) >> 24); \
(p)[4] = U8V((v) >> 32); \
(p)[5] = U8V((v) >> 40); \
(p)[6] = U8V((v) >> 48); \
(p)[7] = U8V((v) >> 56); \
} while (0)
#else
#define U64TO8_LITTLE(p, v) \
do { \
U32TO8_LITTLE((p), U32V((v) )); \
U32TO8_LITTLE((p) + 4, U32V((v) >> 32)); \
} while (0)
#endif
#define U16TO8_BIG(p, v) \
do { \
(p)[0] = U8V((v) ); \
(p)[1] = U8V((v) >> 8); \
} while (0)
#define U32TO8_BIG(p, v) \
do { \
(p)[0] = U8V((v) >> 24); \
(p)[1] = U8V((v) >> 16); \
(p)[2] = U8V((v) >> 8); \
(p)[3] = U8V((v) ); \
} while (0)
#ifdef ECRYPT_NATIVE64
#define U64TO8_BIG(p, v) \
do { \
(p)[0] = U8V((v) >> 56); \
(p)[1] = U8V((v) >> 48); \
(p)[2] = U8V((v) >> 40); \
(p)[3] = U8V((v) >> 32); \
(p)[4] = U8V((v) >> 24); \
(p)[5] = U8V((v) >> 16); \
(p)[6] = U8V((v) >> 8); \
(p)[7] = U8V((v) ); \
} while (0)
#else
#define U64TO8_BIG(p, v) \
do { \
U32TO8_BIG((p), U32V((v) >> 32)); \
U32TO8_BIG((p) + 4, U32V((v) )); \
} while (0)
#endif
#endif
#include "ecrypt-machine.h"
/* ------------------------------------------------------------------------- */
#define AT_LEAST_ONE(n) (((n) < 1) ? 1 : (n))
#define ALIGN(t, v, n) \
union { t b[n]; MAXT l[AT_LEAST_ONE(n * sizeof(t) / sizeof(MAXT))]; } v
/* ------------------------------------------------------------------------- */
#endif

287
src/crypto/salsa20/ecrypt-sync.h
View File

@ -1,287 +0,0 @@
/* ecrypt-sync.h */
/*
* Header file for synchronous stream ciphers without authentication
* mechanism.
*
* *** Please only edit parts marked with "[edit]". ***
*/
#ifndef ECRYPT_SYNC
#define ECRYPT_SYNC
#ifdef __cplusplus
extern "C" {
#endif
#include "ecrypt-portable.h"
/* ------------------------------------------------------------------------- */
/* Cipher parameters */
/*
* The name of your cipher.
*/
#define ECRYPT_NAME "Salsa20" /* [edit] */
#define ECRYPT_PROFILE "S!_H."
/*
* Specify which key and IV sizes are supported by your cipher. A user
* should be able to enumerate the supported sizes by running the
* following code:
*
* for (i = 0; ECRYPT_KEYSIZE(i) <= ECRYPT_MAXKEYSIZE; ++i)
* {
* keysize = ECRYPT_KEYSIZE(i);
*
* ...
* }
*
* All sizes are in bits.
*/
#define ECRYPT_MAXKEYSIZE 256 /* [edit] */
#define ECRYPT_KEYSIZE(i) (128 + (i)*128) /* [edit] */
#define ECRYPT_MAXIVSIZE 64 /* [edit] */
#define ECRYPT_IVSIZE(i) (64 + (i)*64) /* [edit] */
/* ------------------------------------------------------------------------- */
/* Data structures */
/*
* ECRYPT_ctx is the structure containing the representation of the
* internal state of your cipher.
*/
typedef struct
{
u32 input[16]; /* could be compressed */
/*
* [edit]
*
* Put here all state variable needed during the encryption process.
*/
} ECRYPT_ctx;
/* ------------------------------------------------------------------------- */
/* Mandatory functions */
/*
* Key and message independent initialization. This function will be
* called once when the program starts (e.g., to build expanded S-box
* tables).
*/
void ECRYPT_init();
/*
* Key setup. It is the user's responsibility to select the values of
* keysize and ivsize from the set of supported values specified
* above.
*/
void ECRYPT_keysetup(
ECRYPT_ctx* ctx,
const u8* key,
u32 keysize, /* Key size in bits. */
u32 ivsize); /* IV size in bits. */
/*
* IV setup. After having called ECRYPT_keysetup(), the user is
* allowed to call ECRYPT_ivsetup() different times in order to
* encrypt/decrypt different messages with the same key but different
* IV's.
*/
void ECRYPT_ivsetup(
ECRYPT_ctx* ctx,
const u8* iv);
/*
* Encryption/decryption of arbitrary length messages.
*
* For efficiency reasons, the API provides two types of
* encrypt/decrypt functions. The ECRYPT_encrypt_bytes() function
* (declared here) encrypts byte strings of arbitrary length, while
* the ECRYPT_encrypt_blocks() function (defined later) only accepts
* lengths which are multiples of ECRYPT_BLOCKLENGTH.
*
* The user is allowed to make multiple calls to
* ECRYPT_encrypt_blocks() to incrementally encrypt a long message,
* but he is NOT allowed to make additional encryption calls once he
* has called ECRYPT_encrypt_bytes() (unless he starts a new message
* of course). For example, this sequence of calls is acceptable:
*
* ECRYPT_keysetup();
*
* ECRYPT_ivsetup();
* ECRYPT_encrypt_blocks();
* ECRYPT_encrypt_blocks();
* ECRYPT_encrypt_bytes();
*
* ECRYPT_ivsetup();
* ECRYPT_encrypt_blocks();
* ECRYPT_encrypt_blocks();
*
* ECRYPT_ivsetup();
* ECRYPT_encrypt_bytes();
*
* The following sequence is not:
*
* ECRYPT_keysetup();
* ECRYPT_ivsetup();
* ECRYPT_encrypt_blocks();
* ECRYPT_encrypt_bytes();
* ECRYPT_encrypt_blocks();
*/
void ECRYPT_encrypt_bytes(
ECRYPT_ctx* ctx,
const u8* plaintext,
u8* ciphertext,
u32 msglen); /* Message length in bytes. */
void ECRYPT_decrypt_bytes(
ECRYPT_ctx* ctx,
const u8* ciphertext,
u8* plaintext,
u32 msglen); /* Message length in bytes. */
/* ------------------------------------------------------------------------- */
/* Optional features */
/*
* For testing purposes it can sometimes be useful to have a function
* which immediately generates keystream without having to provide it
* with a zero plaintext. If your cipher cannot provide this function
* (e.g., because it is not strictly a synchronous cipher), please
* reset the ECRYPT_GENERATES_KEYSTREAM flag.
*/
#define ECRYPT_GENERATES_KEYSTREAM
#ifdef ECRYPT_GENERATES_KEYSTREAM
void ECRYPT_keystream_bytes(
ECRYPT_ctx* ctx,
u8* keystream,
u32 length); /* Length of keystream in bytes. */
#endif
/* ------------------------------------------------------------------------- */
/* Optional optimizations */
/*
* By default, the functions in this section are implemented using
* calls to functions declared above. However, you might want to
* implement them differently for performance reasons.
*/
/*
* All-in-one encryption/decryption of (short) packets.
*
* The default definitions of these functions can be found in
* "ecrypt-sync.c". If you want to implement them differently, please
* undef the ECRYPT_USES_DEFAULT_ALL_IN_ONE flag.
*/
#define ECRYPT_USES_DEFAULT_ALL_IN_ONE /* [edit] */
void ECRYPT_encrypt_packet(
ECRYPT_ctx* ctx,
const u8* iv,
const u8* plaintext,
u8* ciphertext,
u32 msglen);
void ECRYPT_decrypt_packet(
ECRYPT_ctx* ctx,
const u8* iv,
const u8* ciphertext,
u8* plaintext,
u32 msglen);
/*
* Encryption/decryption of blocks.
*
* By default, these functions are defined as macros. If you want to
* provide a different implementation, please undef the
* ECRYPT_USES_DEFAULT_BLOCK_MACROS flag and implement the functions
* declared below.
*/
#define ECRYPT_BLOCKLENGTH 64 /* [edit] */
#define ECRYPT_USES_DEFAULT_BLOCK_MACROS /* [edit] */
#ifdef ECRYPT_USES_DEFAULT_BLOCK_MACROS
#define ECRYPT_encrypt_blocks(ctx, plaintext, ciphertext, blocks) \
ECRYPT_encrypt_bytes(ctx, plaintext, ciphertext, \
(blocks) * ECRYPT_BLOCKLENGTH)
#define ECRYPT_decrypt_blocks(ctx, ciphertext, plaintext, blocks) \
ECRYPT_decrypt_bytes(ctx, ciphertext, plaintext, \
(blocks) * ECRYPT_BLOCKLENGTH)
#ifdef ECRYPT_GENERATES_KEYSTREAM
#define ECRYPT_keystream_blocks(ctx, keystream, blocks) \
ECRYPT_keystream_bytes(ctx, keystream, \
(blocks) * ECRYPT_BLOCKLENGTH)
#endif
#else
void ECRYPT_encrypt_blocks(
ECRYPT_ctx* ctx,
const u8* plaintext,
u8* ciphertext,
u32 blocks); /* Message length in blocks. */
void ECRYPT_decrypt_blocks(
ECRYPT_ctx* ctx,
const u8* ciphertext,
u8* plaintext,
u32 blocks); /* Message length in blocks. */
#ifdef ECRYPT_GENERATES_KEYSTREAM
void ECRYPT_keystream_blocks(
ECRYPT_ctx* ctx,
const u8* keystream,
u32 blocks); /* Keystream length in blocks. */
#endif
#endif
/*
* If your cipher can be implemented in different ways, you can use
* the ECRYPT_VARIANT parameter to allow the user to choose between
* them at compile time (e.g., gcc -DECRYPT_VARIANT=3 ...). Please
* only use this possibility if you really think it could make a
* significant difference and keep the number of variants
* (ECRYPT_MAXVARIANT) as small as possible (definitely not more than
* 10). Note also that all variants should have exactly the same
* external interface (i.e., the same ECRYPT_BLOCKLENGTH, etc.).
*/
#define ECRYPT_MAXVARIANT 1 /* [edit] */
#ifndef ECRYPT_VARIANT
#define ECRYPT_VARIANT 1
#endif
#if (ECRYPT_VARIANT > ECRYPT_MAXVARIANT)
#error this variant does not exist
#endif
/* ------------------------------------------------------------------------- */
#ifdef __cplusplus
}
#endif
#endif

133
src/crypto/salsa20/salsa20.c
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@ -1,133 +0,0 @@
/*
salsa20-ref.c version 20051118
D. J. Bernstein
Public domain.
*/
#include "ecrypt-sync.h"
#define ROTATE(v,c) (ROTL32(v,c))
#define XOR(v,w) ((v) ^ (w))
#define PLUS(v,w) (U32V((v) + (w)))
#define PLUSONE(v) (PLUS((v),1))
static void salsa20_wordtobyte(u8 output[64],const u32 input[16])
{
u32 x[16];
int i;
for (i = 0;i < 16;++i) x[i] = input[i];
for (i = 20;i > 0;i -= 2) {
x[ 4] = XOR(x[ 4],ROTATE(PLUS(x[ 0],x[12]), 7));
x[ 8] = XOR(x[ 8],ROTATE(PLUS(x[ 4],x[ 0]), 9));
x[12] = XOR(x[12],ROTATE(PLUS(x[ 8],x[ 4]),13));
x[ 0] = XOR(x[ 0],ROTATE(PLUS(x[12],x[ 8]),18));
x[ 9] = XOR(x[ 9],ROTATE(PLUS(x[ 5],x[ 1]), 7));
x[13] = XOR(x[13],ROTATE(PLUS(x[ 9],x[ 5]), 9));
x[ 1] = XOR(x[ 1],ROTATE(PLUS(x[13],x[ 9]),13));
x[ 5] = XOR(x[ 5],ROTATE(PLUS(x[ 1],x[13]),18));
x[14] = XOR(x[14],ROTATE(PLUS(x[10],x[ 6]), 7));
x[ 2] = XOR(x[ 2],ROTATE(PLUS(x[14],x[10]), 9));
x[ 6] = XOR(x[ 6],ROTATE(PLUS(x[ 2],x[14]),13));
x[10] = XOR(x[10],ROTATE(PLUS(x[ 6],x[ 2]),18));
x[ 3] = XOR(x[ 3],ROTATE(PLUS(x[15],x[11]), 7));
x[ 7] = XOR(x[ 7],ROTATE(PLUS(x[ 3],x[15]), 9));
x[11] = XOR(x[11],ROTATE(PLUS(x[ 7],x[ 3]),13));
x[15] = XOR(x[15],ROTATE(PLUS(x[11],x[ 7]),18));
x[ 1] = XOR(x[ 1],ROTATE(PLUS(x[ 0],x[ 3]), 7));
x[ 2] = XOR(x[ 2],ROTATE(PLUS(x[ 1],x[ 0]), 9));
x[ 3] = XOR(x[ 3],ROTATE(PLUS(x[ 2],x[ 1]),13));
x[ 0] = XOR(x[ 0],ROTATE(PLUS(x[ 3],x[ 2]),18));
x[ 6] = XOR(x[ 6],ROTATE(PLUS(x[ 5],x[ 4]), 7));
x[ 7] = XOR(x[ 7],ROTATE(PLUS(x[ 6],x[ 5]), 9));
x[ 4] = XOR(x[ 4],ROTATE(PLUS(x[ 7],x[ 6]),13));
x[ 5] = XOR(x[ 5],ROTATE(PLUS(x[ 4],x[ 7]),18));
x[11] = XOR(x[11],ROTATE(PLUS(x[10],x[ 9]), 7));
x[ 8] = XOR(x[ 8],ROTATE(PLUS(x[11],x[10]), 9));
x[ 9] = XOR(x[ 9],ROTATE(PLUS(x[ 8],x[11]),13));
x[10] = XOR(x[10],ROTATE(PLUS(x[ 9],x[ 8]),18));
x[12] = XOR(x[12],ROTATE(PLUS(x[15],x[14]), 7));
x[13] = XOR(x[13],ROTATE(PLUS(x[12],x[15]), 9));
x[14] = XOR(x[14],ROTATE(PLUS(x[13],x[12]),13));
x[15] = XOR(x[15],ROTATE(PLUS(x[14],x[13]),18));
}
for (i = 0;i < 16;++i) x[i] = PLUS(x[i],input[i]);
for (i = 0;i < 16;++i) U32TO8_LITTLE(output + 4 * i,x[i]);
}
void ECRYPT_init(void)
{
return;
}
static const char sigma[16] = "expand 32-byte k";
static const char tau[16] = "expand 16-byte k";
void ECRYPT_keysetup(ECRYPT_ctx *x,const u8 *k,u32 kbits,u32 ivbits)
{
(void)ivbits;
const char *constants;
x->input[1] = U8TO32_LITTLE(k + 0);
x->input[2] = U8TO32_LITTLE(k + 4);
x->input[3] = U8TO32_LITTLE(k + 8);
x->input[4] = U8TO32_LITTLE(k + 12);
if (kbits == 256) { /* recommended */
k += 16;
constants = sigma;
} else { /* kbits == 128 */
constants = tau;
}
x->input[11] = U8TO32_LITTLE(k + 0);
x->input[12] = U8TO32_LITTLE(k + 4);
x->input[13] = U8TO32_LITTLE(k + 8);
x->input[14] = U8TO32_LITTLE(k + 12);
x->input[0] = U8TO32_LITTLE(constants + 0);
x->input[5] = U8TO32_LITTLE(constants + 4);
x->input[10] = U8TO32_LITTLE(constants + 8);
x->input[15] = U8TO32_LITTLE(constants + 12);
}
void ECRYPT_ivsetup(ECRYPT_ctx *x,const u8 *iv)
{
x->input[6] = U8TO32_LITTLE(iv + 0);
x->input[7] = U8TO32_LITTLE(iv + 4);
x->input[8] = 0;
x->input[9] = 0;
}
void ECRYPT_encrypt_bytes(ECRYPT_ctx *x,const u8 *m,u8 *c,u32 bytes)
{
u8 output[64];
u32 i;
if (!bytes) return;
for (;;) {
salsa20_wordtobyte(output,x->input);
x->input[8] = PLUSONE(x->input[8]);
if (!x->input[8]) {
x->input[9] = PLUSONE(x->input[9]);
/* stopping at 2^70 bytes per nonce is user's responsibility */
}
if (bytes <= 64) {
for (i = 0;i < bytes;++i) c[i] = m[i] ^ output[i];
return;
}
for (i = 0;i < 64;++i) c[i] = m[i] ^ output[i];
bytes -= 64;
c += 64;
m += 64;
}
}
void ECRYPT_decrypt_bytes(ECRYPT_ctx *x,const u8 *c,u8 *m,u32 bytes)
{
ECRYPT_encrypt_bytes(x,c,m,bytes);
}
void ECRYPT_keystream_bytes(ECRYPT_ctx *x,u8 *stream,u32 bytes)
{
u32 i;
for (i = 0;i < bytes;++i) stream[i] = 0;
ECRYPT_encrypt_bytes(x,stream,stream,bytes);
}