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201 lines
6.2 KiB
C
201 lines
6.2 KiB
C
/*
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* Copyright 2010-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/modes.h>
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#if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
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typedef __int64 i64;
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typedef unsigned __int64 u64;
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# define U64(C) C##UI64
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#elif defined(__arch64__)
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typedef long i64;
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typedef unsigned long u64;
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# define U64(C) C##UL
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#else
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typedef long long i64;
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typedef unsigned long long u64;
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# define U64(C) C##ULL
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#endif
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typedef unsigned int u32;
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typedef unsigned char u8;
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#define STRICT_ALIGNMENT 1
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#ifndef PEDANTIC
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# if defined(__i386) || defined(__i386__) || \
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defined(__x86_64) || defined(__x86_64__) || \
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defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \
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defined(__aarch64__) || \
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defined(__s390__) || defined(__s390x__)
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# undef STRICT_ALIGNMENT
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# endif
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#endif
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#ifndef STRICT_ALIGNMENT
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# ifdef __GNUC__
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typedef u32 u32_a1 __attribute((__aligned__(1)));
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# else
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typedef u32 u32_a1;
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# endif
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#endif
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#if !defined(PEDANTIC) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
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# if defined(__GNUC__) && __GNUC__>=2
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# if defined(__x86_64) || defined(__x86_64__)
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# define BSWAP8(x) ({ u64 ret_=(x); \
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asm ("bswapq %0" \
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: "+r"(ret_)); ret_; })
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# define BSWAP4(x) ({ u32 ret_=(x); \
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asm ("bswapl %0" \
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: "+r"(ret_)); ret_; })
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# elif (defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)
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# define BSWAP8(x) ({ u32 lo_=(u64)(x)>>32,hi_=(x); \
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asm ("bswapl %0; bswapl %1" \
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: "+r"(hi_),"+r"(lo_)); \
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(u64)hi_<<32|lo_; })
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# define BSWAP4(x) ({ u32 ret_=(x); \
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asm ("bswapl %0" \
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: "+r"(ret_)); ret_; })
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# elif defined(__aarch64__)
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# if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
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__BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__
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# define BSWAP8(x) ({ u64 ret_; \
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asm ("rev %0,%1" \
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: "=r"(ret_) : "r"(x)); ret_; })
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# define BSWAP4(x) ({ u32 ret_; \
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asm ("rev %w0,%w1" \
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: "=r"(ret_) : "r"(x)); ret_; })
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# endif
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# elif (defined(__arm__) || defined(__arm)) && !defined(STRICT_ALIGNMENT)
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# define BSWAP8(x) ({ u32 lo_=(u64)(x)>>32,hi_=(x); \
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asm ("rev %0,%0; rev %1,%1" \
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: "+r"(hi_),"+r"(lo_)); \
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(u64)hi_<<32|lo_; })
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# define BSWAP4(x) ({ u32 ret_; \
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asm ("rev %0,%1" \
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: "=r"(ret_) : "r"((u32)(x))); \
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ret_; })
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# endif
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# elif defined(_MSC_VER)
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# if _MSC_VER>=1300
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# include <stdlib.h>
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# pragma intrinsic(_byteswap_uint64,_byteswap_ulong)
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# define BSWAP8(x) _byteswap_uint64((u64)(x))
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# define BSWAP4(x) _byteswap_ulong((u32)(x))
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# elif defined(_M_IX86)
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__inline u32 _bswap4(u32 val)
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{
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_asm mov eax, val _asm bswap eax}
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# define BSWAP4(x) _bswap4(x)
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# endif
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# endif
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#endif
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#if defined(BSWAP4) && !defined(STRICT_ALIGNMENT)
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# define GETU32(p) BSWAP4(*(const u32_a1 *)(p))
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# define PUTU32(p,v) *(u32_a1 *)(p) = BSWAP4(v)
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#else
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# define GETU32(p) ((u32)(p)[0]<<24|(u32)(p)[1]<<16|(u32)(p)[2]<<8|(u32)(p)[3])
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# define PUTU32(p,v) ((p)[0]=(u8)((v)>>24),(p)[1]=(u8)((v)>>16),(p)[2]=(u8)((v)>>8),(p)[3]=(u8)(v))
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#endif
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/*- GCM definitions */ typedef struct {
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u64 hi, lo;
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} u128;
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#ifdef TABLE_BITS
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# undef TABLE_BITS
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#endif
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/*
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* Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
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* never be set to 8 [or 1]. For further information see gcm128.c.
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*/
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#define TABLE_BITS 4
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struct gcm128_context {
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/* Following 6 names follow names in GCM specification */
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union {
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u64 u[2];
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u32 d[4];
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u8 c[16];
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size_t t[16 / sizeof(size_t)];
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} Yi, EKi, EK0, len, Xi, H;
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/*
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* Relative position of Xi, H and pre-computed Htable is used in some
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* assembler modules, i.e. don't change the order!
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*/
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#if TABLE_BITS==8
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u128 Htable[256];
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#else
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u128 Htable[16];
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void (*gmult) (u64 Xi[2], const u128 Htable[16]);
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void (*ghash) (u64 Xi[2], const u128 Htable[16], const u8 *inp,
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size_t len);
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#endif
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unsigned int mres, ares;
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block128_f block;
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void *key;
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#if !defined(OPENSSL_SMALL_FOOTPRINT)
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unsigned char Xn[48];
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#endif
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};
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struct xts128_context {
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void *key1, *key2;
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block128_f block1, block2;
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};
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struct ccm128_context {
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union {
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u64 u[2];
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u8 c[16];
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} nonce, cmac;
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u64 blocks;
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block128_f block;
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void *key;
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};
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#ifndef OPENSSL_NO_OCB
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typedef union {
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u64 a[2];
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unsigned char c[16];
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} OCB_BLOCK;
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# define ocb_block16_xor(in1,in2,out) \
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( (out)->a[0]=(in1)->a[0]^(in2)->a[0], \
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(out)->a[1]=(in1)->a[1]^(in2)->a[1] )
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# if STRICT_ALIGNMENT
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# define ocb_block16_xor_misaligned(in1,in2,out) \
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ocb_block_xor((in1)->c,(in2)->c,16,(out)->c)
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# else
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# define ocb_block16_xor_misaligned ocb_block16_xor
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# endif
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struct ocb128_context {
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/* Need both encrypt and decrypt key schedules for decryption */
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block128_f encrypt;
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block128_f decrypt;
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void *keyenc;
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void *keydec;
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ocb128_f stream; /* direction dependent */
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/* Key dependent variables. Can be reused if key remains the same */
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size_t l_index;
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size_t max_l_index;
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OCB_BLOCK l_star;
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OCB_BLOCK l_dollar;
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OCB_BLOCK *l;
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/* Must be reset for each session */
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struct {
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u64 blocks_hashed;
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u64 blocks_processed;
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OCB_BLOCK offset_aad;
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OCB_BLOCK sum;
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OCB_BLOCK offset;
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OCB_BLOCK checksum;
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} sess;
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};
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#endif /* OPENSSL_NO_OCB */
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