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openssl/crypto/modes/modes_lcl.h
Pauli 5516c19b03 AES-XTS block limit. 
Limit the number of AES blocks in a data unit to 2^20 or less.
This corresponds to the mandates in IEEE Std 1619-2018 and NIST SP 800-38E.

Note: that this is a change from IEEE Std 1619-2007 which only recommended
this limit.

Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/8627)
2019-04-03 16:03:46 +10:00

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/*
* Copyright 2010-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/modes.h>
#if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
typedef __int64 i64;
typedef unsigned __int64 u64;
# define U64(C) C##UI64
#elif defined(__arch64__)
typedef long i64;
typedef unsigned long u64;
# define U64(C) C##UL
#else
typedef long long i64;
typedef unsigned long long u64;
# define U64(C) C##ULL
#endif
typedef unsigned int u32;
typedef unsigned char u8;
#define STRICT_ALIGNMENT 1
#ifndef PEDANTIC
# if defined(__i386) || defined(__i386__) || \
defined(__x86_64) || defined(__x86_64__) || \
defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \
defined(__aarch64__) || \
defined(__s390__) || defined(__s390x__)
# undef STRICT_ALIGNMENT
# endif
#endif
#if !defined(PEDANTIC) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
# if defined(__GNUC__) && __GNUC__>=2
# if defined(__x86_64) || defined(__x86_64__)
# define BSWAP8(x) ({ u64 ret_=(x); \
asm ("bswapq %0" \
: "+r"(ret_)); ret_; })
# define BSWAP4(x) ({ u32 ret_=(x); \
asm ("bswapl %0" \
: "+r"(ret_)); ret_; })
# elif (defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)
# define BSWAP8(x) ({ u32 lo_=(u64)(x)>>32,hi_=(x); \
asm ("bswapl %0; bswapl %1" \
: "+r"(hi_),"+r"(lo_)); \
(u64)hi_<<32|lo_; })
# define BSWAP4(x) ({ u32 ret_=(x); \
asm ("bswapl %0" \
: "+r"(ret_)); ret_; })
# elif defined(__aarch64__)
# define BSWAP8(x) ({ u64 ret_; \
asm ("rev %0,%1" \
: "=r"(ret_) : "r"(x)); ret_; })
# define BSWAP4(x) ({ u32 ret_; \
asm ("rev %w0,%w1" \
: "=r"(ret_) : "r"(x)); ret_; })
# elif (defined(__arm__) || defined(__arm)) && !defined(STRICT_ALIGNMENT)
# define BSWAP8(x) ({ u32 lo_=(u64)(x)>>32,hi_=(x); \
asm ("rev %0,%0; rev %1,%1" \
: "+r"(hi_),"+r"(lo_)); \
(u64)hi_<<32|lo_; })
# define BSWAP4(x) ({ u32 ret_; \
asm ("rev %0,%1" \
: "=r"(ret_) : "r"((u32)(x))); \
ret_; })
# endif
# elif defined(_MSC_VER)
# if _MSC_VER>=1300
# include <stdlib.h>
# pragma intrinsic(_byteswap_uint64,_byteswap_ulong)
# define BSWAP8(x) _byteswap_uint64((u64)(x))
# define BSWAP4(x) _byteswap_ulong((u32)(x))
# elif defined(_M_IX86)
__inline u32 _bswap4(u32 val)
{
_asm mov eax, val _asm bswap eax}
# define BSWAP4(x) _bswap4(x)
# endif
# endif
#endif
#if defined(BSWAP4) && !defined(STRICT_ALIGNMENT)
# define GETU32(p) BSWAP4(*(const u32 *)(p))
# define PUTU32(p,v) *(u32 *)(p) = BSWAP4(v)
#else
# define GETU32(p) ((u32)(p)[0]<<24|(u32)(p)[1]<<16|(u32)(p)[2]<<8|(u32)(p)[3])
# define PUTU32(p,v) ((p)[0]=(u8)((v)>>24),(p)[1]=(u8)((v)>>16),(p)[2]=(u8)((v)>>8),(p)[3]=(u8)(v))
#endif
/*- GCM definitions */ typedef struct {
u64 hi, lo;
} u128;
#ifdef TABLE_BITS
# undef TABLE_BITS
#endif
/*
* Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
* never be set to 8 [or 1]. For further information see gcm128.c.
*/
#define TABLE_BITS 4
struct gcm128_context {
/* Following 6 names follow names in GCM specification */
union {
u64 u[2];
u32 d[4];
u8 c[16];
size_t t[16 / sizeof(size_t)];
} Yi, EKi, EK0, len, Xi, H;
/*
* Relative position of Xi, H and pre-computed Htable is used in some
* assembler modules, i.e. don't change the order!
*/
#if TABLE_BITS==8
u128 Htable[256];
#else
u128 Htable[16];
void (*gmult) (u64 Xi[2], const u128 Htable[16]);
void (*ghash) (u64 Xi[2], const u128 Htable[16], const u8 *inp,
size_t len);
#endif
unsigned int mres, ares;
block128_f block;
void *key;
#if !defined(OPENSSL_SMALL_FOOTPRINT)
unsigned char Xn[48];
#endif
};
/*
* The maximum permitted number of cipher blocks per data unit in XTS mode.
* Reference IEEE Std 1619-2018.
*/
#define XTS_MAX_BLOCKS_PER_DATA_UNIT (1<<20)
struct xts128_context {
void *key1, *key2;
block128_f block1, block2;
};
struct ccm128_context {
union {
u64 u[2];
u8 c[16];
} nonce, cmac;
u64 blocks;
block128_f block;
void *key;
};
#ifndef OPENSSL_NO_OCB
typedef union {
u64 a[2];
unsigned char c[16];
} OCB_BLOCK;
# define ocb_block16_xor(in1,in2,out) \
( (out)->a[0]=(in1)->a[0]^(in2)->a[0], \
(out)->a[1]=(in1)->a[1]^(in2)->a[1] )
# if STRICT_ALIGNMENT
# define ocb_block16_xor_misaligned(in1,in2,out) \
ocb_block_xor((in1)->c,(in2)->c,16,(out)->c)
# else
# define ocb_block16_xor_misaligned ocb_block16_xor
# endif
struct ocb128_context {
/* Need both encrypt and decrypt key schedules for decryption */
block128_f encrypt;
block128_f decrypt;
void *keyenc;
void *keydec;
ocb128_f stream; /* direction dependent */
/* Key dependent variables. Can be reused if key remains the same */
size_t l_index;
size_t max_l_index;
OCB_BLOCK l_star;
OCB_BLOCK l_dollar;
OCB_BLOCK *l;
/* Must be reset for each session */
struct {
u64 blocks_hashed;
u64 blocks_processed;
OCB_BLOCK offset_aad;
OCB_BLOCK sum;
OCB_BLOCK offset;
OCB_BLOCK checksum;
} sess;
};
#endif /* OPENSSL_NO_OCB */
#ifndef OPENSSL_NO_SIV
#include <openssl/cmac.h>
#define SIV_LEN 16
typedef union siv_block_u {
uint64_t word[SIV_LEN/sizeof(uint64_t)];
unsigned char byte[SIV_LEN];
} SIV_BLOCK;
struct siv128_context {
/* d stores intermediate results of S2V; it corresponds to D from the
pseudocode in section 2.4 of RFC 5297. */
SIV_BLOCK d;
SIV_BLOCK tag;
EVP_CIPHER_CTX *cipher_ctx;
EVP_MAC_CTX *mac_ctx_init;
EVP_MAC_CTX *mac_ctx;
int final_ret;
int crypto_ok;
};
#endif /* OPENSSL_NO_SIV */
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