1/*
2 * sha.h: header file for SHA-1/224/256/384/512 routines
3 *
4 * Ref: NIST FIPS PUB 180-4 Secure Hash Standard
5 *
6 * Copyright (C) 2003-2023 Mark Shelor, All Rights Reserved
7 *
8 * Version: 6.04
9 * Sat Feb 25 12:00:50 PM MST 2023
10 *
11 */
12
13#ifndef _INCLUDE_SHA_H_
14#define _INCLUDE_SHA_H_
15
16#include <limits.h>
17
18#define SHA32_MAX	4294967295U
19
20#define SHA32_SHR(x, n)	((x) >> (n))
21#define SHA32_SHL(x, n)	((x) << (n))
22
23#define SHA64_SHR(x, n)	((x) >> (n))
24#define SHA64_SHL(x, n)	((x) << (n))
25
26#define SHA32_ALIGNED
27#define SHA64_ALIGNED
28
29#define SHA_LO32(x)	(x)
30
31#if USHRT_MAX == SHA32_MAX
32	#define SHA32	unsigned short
33	#define SHA32_CONST(c)	c ## U
34#elif UINT_MAX == SHA32_MAX
35	#define SHA32	unsigned int
36	#define SHA32_CONST(c)	c ## U
37#elif ULONG_MAX == SHA32_MAX
38	#define SHA32	unsigned long
39	#define SHA32_CONST(c)	c ## UL
40#else
41	#undef  SHA32_ALIGNED
42	#undef  SHA_LO32
43	#define SHA_LO32(x)	((x) & SHA32_MAX)
44	#undef  SHA32_SHR
45	#define SHA32_SHR(x, n)	(SHA_LO32(x) >> (n))
46	#define SHA32	unsigned long
47	#define SHA32_CONST(c)	c ## UL
48#endif
49
50#if defined(ULONG_LONG_MAX) || defined(ULLONG_MAX) || defined(HAS_LONG_LONG)
51	#define SHA_ULL_EXISTS
52#endif
53
54#if (((ULONG_MAX >> 16) >> 16) >> 16) >> 15 == 1UL
55	#define SHA64	unsigned long
56	#define SHA64_CONST(c)	c ## UL
57#elif defined(SHA_ULL_EXISTS) && defined(LONGLONGSIZE) && LONGLONGSIZE == 8
58	#define SHA64	unsigned long long
59	#define SHA64_CONST(c)	c ## ULL
60#elif defined(SHA_ULL_EXISTS)
61	#undef  SHA64_ALIGNED
62	#undef  SHA64_SHR
63	#define SHA64_MAX	18446744073709551615ULL
64	#define SHA64_SHR(x, n)	(((x) & SHA64_MAX) >> (n))
65	#define SHA64	unsigned long long
66	#define SHA64_CONST(c)	c ## ULL
67
68	/* The following cases detect compilers that
69	 * support 64-bit types in a non-standard way */
70
71#elif defined(_MSC_VER)					/* Microsoft C */
72	#define SHA64	unsigned __int64
73	#define SHA64_CONST(c)	(SHA64) c
74#endif
75
76#if defined(SHA64) && !defined(NO_SHA_384_512)
77	#define SHA_384_512
78#endif
79
80#if defined(BYTEORDER) && (BYTEORDER & 0xffff) == 0x4321
81	#if defined(SHA32_ALIGNED)
82		#define SHA32_SCHED(W, b)	Copy(b, W, 64, char)
83	#endif
84	#if defined(SHA64) && defined(SHA64_ALIGNED)
85		#define SHA64_SCHED(W, b)	Copy(b, W, 128, char)
86	#endif
87#endif
88
89#if !defined(SHA32_SCHED)
90	#define SHA32_SCHED(W, b) { int t; SHA32 *q = W;		\
91		for (t = 0; t < 16; t++, b += 4) *q++ =			\
92			(SHA32) b[0] << 24 | (SHA32) b[1] << 16 |	\
93			(SHA32) b[2] <<  8 | (SHA32) b[3]; }
94#endif
95
96#if defined(SHA64) && !defined(SHA64_SCHED)
97	#define SHA64_SCHED(W, b) { int t; SHA64 *q = W;		\
98		for (t = 0; t < 16; t++, b += 8) *q++ =			\
99			(SHA64) b[0] << 56 | (SHA64) b[1] << 48 |	\
100			(SHA64) b[2] << 40 | (SHA64) b[3] << 32 |	\
101			(SHA64) b[4] << 24 | (SHA64) b[5] << 16 |	\
102			(SHA64) b[6] <<  8 | (SHA64) b[7]; }
103#endif
104
105#define SHA1		1
106#define SHA224		224
107#define SHA256		256
108#define SHA384		384
109#define SHA512		512
110#define SHA512224	512224
111#define SHA512256	512256
112
113#define SHA1_BLOCK_BITS		512
114#define SHA224_BLOCK_BITS	SHA1_BLOCK_BITS
115#define SHA256_BLOCK_BITS	SHA1_BLOCK_BITS
116#define SHA384_BLOCK_BITS	1024
117#define SHA512_BLOCK_BITS	SHA384_BLOCK_BITS
118#define SHA512224_BLOCK_BITS	SHA512_BLOCK_BITS
119#define SHA512256_BLOCK_BITS	SHA512_BLOCK_BITS
120
121#define SHA1_DIGEST_BITS	160
122#define SHA224_DIGEST_BITS	224
123#define SHA256_DIGEST_BITS	256
124#define SHA384_DIGEST_BITS	384
125#define SHA512_DIGEST_BITS	512
126#define SHA512224_DIGEST_BITS	224
127#define SHA512256_DIGEST_BITS	256
128
129#define SHA_MAX_BLOCK_BITS	SHA512_BLOCK_BITS
130#define SHA_MAX_DIGEST_BITS	SHA512_DIGEST_BITS
131#define SHA_MAX_HEX_LEN		(SHA_MAX_DIGEST_BITS / 4)
132#define SHA_MAX_BASE64_LEN	(1 + (SHA_MAX_DIGEST_BITS / 6))
133
134#if !defined(SHA64)
135	#define SHA64	SHA32
136#endif
137
138typedef struct SHA {
139	int alg;
140	void (*sha)(struct SHA *, unsigned char *);
141	SHA32 H32[8];
142	SHA64 H64[8];
143	unsigned char block[SHA_MAX_BLOCK_BITS/8];
144	unsigned int blockcnt;
145	unsigned int blocksize;
146	SHA32 lenhh, lenhl, lenlh, lenll;
147	unsigned char digest[SHA_MAX_DIGEST_BITS/8];
148	unsigned int digestlen;
149	char hex[SHA_MAX_HEX_LEN+1];
150	char base64[SHA_MAX_BASE64_LEN+1];
151} SHA;
152
153typedef struct {
154	SHA isha;
155	SHA osha;
156	unsigned int digestlen;
157	unsigned char key[SHA_MAX_BLOCK_BITS/8];
158} HMAC;
159
160#endif	/* _INCLUDE_SHA_H_ */
161