1 /* ====================================================================
2 * Copyright (c) 2010 The OpenSSL Project. All rights reserved.
3 *
4 * Redistribution and use is governed by OpenSSL license.
5 * ====================================================================
6 */
7
8 #include <openssl/modes.h>
9
10 #if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
11 typedef __int64 i64;
12 typedef unsigned __int64 u64;
13 # define U64(C) C##UI64
14 #elif defined(__arch64__)
15 typedef long i64;
16 typedef unsigned long u64;
17 # define U64(C) C##UL
18 #else
19 typedef long long i64;
20 typedef unsigned long long u64;
21 # define U64(C) C##ULL
22 #endif
23
24 typedef unsigned int u32;
25 typedef unsigned char u8;
26
27 #define STRICT_ALIGNMENT 1
28 #if defined(__i386) || defined(__i386__) || \
29 defined(__x86_64) || defined(__x86_64__) || \
30 defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \
31 defined(__s390__) || defined(__s390x__)
32 # undef STRICT_ALIGNMENT
33 #endif
34
35 #if !defined(PEDANTIC) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
36 # if defined(__GNUC__) && __GNUC__>=2
37 # if defined(__x86_64) || defined(__x86_64__)
38 # define BSWAP8(x) ({ u64 ret=(x); \
39 asm ("bswapq %0" \
40 : "+r"(ret)); ret; })
41 # define BSWAP4(x) ({ u32 ret=(x); \
42 asm ("bswapl %0" \
43 : "+r"(ret)); ret; })
44 # elif (defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)
45 # define BSWAP8(x) ({ u32 lo=(u64)(x)>>32,hi=(x); \
46 asm ("bswapl %0; bswapl %1" \
47 : "+r"(hi),"+r"(lo)); \
48 (u64)hi<<32|lo; })
49 # define BSWAP4(x) ({ u32 ret=(x); \
50 asm ("bswapl %0" \
51 : "+r"(ret)); ret; })
52 # elif (defined(__arm__) || defined(__arm)) && !defined(STRICT_ALIGNMENT)
53 # define BSWAP8(x) ({ u32 lo=(u64)(x)>>32,hi=(x); \
54 asm ("rev %0,%0; rev %1,%1" \
55 : "+r"(hi),"+r"(lo)); \
56 (u64)hi<<32|lo; })
57 # define BSWAP4(x) ({ u32 ret; \
58 asm ("rev %0,%1" \
59 : "=r"(ret) : "r"((u32)(x))); \
60 ret; })
61 # endif
62 # elif defined(_MSC_VER)
63 # if _MSC_VER>=1300
64 # pragma intrinsic(_byteswap_uint64,_byteswap_ulong)
65 # define BSWAP8(x) _byteswap_uint64((u64)(x))
66 # define BSWAP4(x) _byteswap_ulong((u32)(x))
67 # elif defined(_M_IX86)
_bswap4(u32 val)68 __inline u32 _bswap4(u32 val)
69 {
70 _asm mov eax, val _asm bswap eax}
71 # define BSWAP4(x) _bswap4(x)
72 # endif
73 # endif
74 #endif
75 #if defined(BSWAP4) && !defined(STRICT_ALIGNMENT)
76 # define GETU32(p) BSWAP4(*(const u32 *)(p))
77 # define PUTU32(p,v) *(u32 *)(p) = BSWAP4(v)
78 #else
79 # define GETU32(p) ((u32)(p)[0]<<24|(u32)(p)[1]<<16|(u32)(p)[2]<<8|(u32)(p)[3])
80 # define PUTU32(p,v) ((p)[0]=(u8)((v)>>24),(p)[1]=(u8)((v)>>16),(p)[2]=(u8)((v)>>8),(p)[3]=(u8)(v))
81 #endif
82 /*- GCM definitions */ typedef struct {
83 u64 hi, lo;
84 } u128;
85
86 #ifdef TABLE_BITS
87 # undef TABLE_BITS
88 #endif
89 /*
90 * Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
91 * never be set to 8 [or 1]. For further information see gcm128.c.
92 */
93 #define TABLE_BITS 4
94
95 struct gcm128_context {
96 /* Following 6 names follow names in GCM specification */
97 union {
98 u64 u[2];
99 u32 d[4];
100 u8 c[16];
101 size_t t[16 / sizeof(size_t)];
102 } Yi, EKi, EK0, len, Xi, H;
103 /*
104 * Relative position of Xi, H and pre-computed Htable is used in some
105 * assembler modules, i.e. don't change the order!
106 */
107 #if TABLE_BITS==8
108 u128 Htable[256];
109 #else
110 u128 Htable[16];
111 void (*gmult) (u64 Xi[2], const u128 Htable[16]);
112 void (*ghash) (u64 Xi[2], const u128 Htable[16], const u8 *inp,
113 size_t len);
114 #endif
115 unsigned int mres, ares;
116 block128_f block;
117 void *key;
118 };
119
120 struct xts128_context {
121 void *key1, *key2;
122 block128_f block1, block2;
123 };
124
125 struct ccm128_context {
126 union {
127 u64 u[2];
128 u8 c[16];
129 } nonce, cmac;
130 u64 blocks;
131 block128_f block;
132 void *key;
133 };
134