1 | /***************************************************************************
|
---|
2 | * _ _ ____ _
|
---|
3 | * Project ___| | | | _ \| |
|
---|
4 | * / __| | | | |_) | |
|
---|
5 | * | (__| |_| | _ <| |___
|
---|
6 | * \___|\___/|_| \_\_____|
|
---|
7 | *
|
---|
8 | * Copyright (C) 1998 - 2016, Florin Petriuc, <petriuc.florin@gmail.com>
|
---|
9 | *
|
---|
10 | * This software is licensed as described in the file COPYING, which
|
---|
11 | * you should have received as part of this distribution. The terms
|
---|
12 | * are also available at https://curl.haxx.se/docs/copyright.html.
|
---|
13 | *
|
---|
14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
---|
15 | * copies of the Software, and permit persons to whom the Software is
|
---|
16 | * furnished to do so, under the terms of the COPYING file.
|
---|
17 | *
|
---|
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
---|
19 | * KIND, either express or implied.
|
---|
20 | *
|
---|
21 | ***************************************************************************/
|
---|
22 |
|
---|
23 | #include "curl_setup.h"
|
---|
24 |
|
---|
25 | #ifndef CURL_DISABLE_CRYPTO_AUTH
|
---|
26 |
|
---|
27 | #include "warnless.h"
|
---|
28 | #include "curl_sha256.h"
|
---|
29 |
|
---|
30 | #if defined(USE_OPENSSL)
|
---|
31 |
|
---|
32 | /* When OpenSSL is available we use the SHA256-function from OpenSSL */
|
---|
33 | #include <openssl/sha.h>
|
---|
34 |
|
---|
35 | #else
|
---|
36 |
|
---|
37 | /* When no other crypto library is available we use this code segment */
|
---|
38 |
|
---|
39 | /* ===== start - public domain SHA256 implementation ===== */
|
---|
40 | /* This is based on SHA256 implementation in LibTomCrypt that was released into
|
---|
41 | * public domain by Tom St Denis. */
|
---|
42 |
|
---|
43 | #define WPA_GET_BE32(a) ((((unsigned long)(a)[0]) << 24) | \
|
---|
44 | (((unsigned long)(a)[1]) << 16) | \
|
---|
45 | (((unsigned long)(a)[2]) << 8) | \
|
---|
46 | ((unsigned long)(a)[3]))
|
---|
47 | #define WPA_PUT_BE32(a, val) \
|
---|
48 | do { \
|
---|
49 | (a)[0] = (unsigned char)((((unsigned long) (val)) >> 24) & 0xff); \
|
---|
50 | (a)[1] = (unsigned char)((((unsigned long) (val)) >> 16) & 0xff); \
|
---|
51 | (a)[2] = (unsigned char)((((unsigned long) (val)) >> 8) & 0xff); \
|
---|
52 | (a)[3] = (unsigned char)(((unsigned long) (val)) & 0xff); \
|
---|
53 | } while(0)
|
---|
54 |
|
---|
55 | #ifdef HAVE_LONGLONG
|
---|
56 | #define WPA_PUT_BE64(a, val) \
|
---|
57 | do { \
|
---|
58 | (a)[0] = (unsigned char)(((unsigned long long)(val)) >> 56); \
|
---|
59 | (a)[1] = (unsigned char)(((unsigned long long)(val)) >> 48); \
|
---|
60 | (a)[2] = (unsigned char)(((unsigned long long)(val)) >> 40); \
|
---|
61 | (a)[3] = (unsigned char)(((unsigned long long)(val)) >> 32); \
|
---|
62 | (a)[4] = (unsigned char)(((unsigned long long)(val)) >> 24); \
|
---|
63 | (a)[5] = (unsigned char)(((unsigned long long)(val)) >> 16); \
|
---|
64 | (a)[6] = (unsigned char)(((unsigned long long)(val)) >> 8); \
|
---|
65 | (a)[7] = (unsigned char)(((unsigned long long)(val)) & 0xff); \
|
---|
66 | } while(0)
|
---|
67 | #else
|
---|
68 | #define WPA_PUT_BE64(a, val) \
|
---|
69 | do { \
|
---|
70 | (a)[0] = (unsigned char)(((unsigned __int64)(val)) >> 56); \
|
---|
71 | (a)[1] = (unsigned char)(((unsigned __int64)(val)) >> 48); \
|
---|
72 | (a)[2] = (unsigned char)(((unsigned __int64)(val)) >> 40); \
|
---|
73 | (a)[3] = (unsigned char)(((unsigned __int64)(val)) >> 32); \
|
---|
74 | (a)[4] = (unsigned char)(((unsigned __int64)(val)) >> 24); \
|
---|
75 | (a)[5] = (unsigned char)(((unsigned __int64)(val)) >> 16); \
|
---|
76 | (a)[6] = (unsigned char)(((unsigned __int64)(val)) >> 8); \
|
---|
77 | (a)[7] = (unsigned char)(((unsigned __int64)(val)) & 0xff); \
|
---|
78 | } while(0)
|
---|
79 | #endif
|
---|
80 |
|
---|
81 | typedef struct sha256_state {
|
---|
82 | #ifdef HAVE_LONGLONG
|
---|
83 | unsigned long long length;
|
---|
84 | #else
|
---|
85 | unsigned __int64 length;
|
---|
86 | #endif
|
---|
87 | unsigned long state[8], curlen;
|
---|
88 | unsigned char buf[64];
|
---|
89 | } SHA256_CTX;
|
---|
90 | /* the K array */
|
---|
91 | static const unsigned long K[64] = {
|
---|
92 | 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,
|
---|
93 | 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,
|
---|
94 | 0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,
|
---|
95 | 0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
|
---|
96 | 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,
|
---|
97 | 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,
|
---|
98 | 0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,
|
---|
99 | 0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
|
---|
100 | 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,
|
---|
101 | 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,
|
---|
102 | 0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,
|
---|
103 | 0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
|
---|
104 | 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
|
---|
105 | };
|
---|
106 | /* Various logical functions */
|
---|
107 | #define RORc(x, y) \
|
---|
108 | (((((unsigned long)(x) & 0xFFFFFFFFUL) >> (unsigned long)((y) & 31)) | \
|
---|
109 | ((unsigned long)(x) << (unsigned long)(32 - ((y) & 31)))) & 0xFFFFFFFFUL)
|
---|
110 | #define Ch(x,y,z) (z ^ (x & (y ^ z)))
|
---|
111 | #define Maj(x,y,z) (((x | y) & z) | (x & y))
|
---|
112 | #define S(x, n) RORc((x), (n))
|
---|
113 | #define R(x, n) (((x)&0xFFFFFFFFUL)>>(n))
|
---|
114 | #define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22))
|
---|
115 | #define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25))
|
---|
116 | #define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
|
---|
117 | #define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
|
---|
118 | #ifndef MIN
|
---|
119 | #define MIN(x, y) (((x) < (y)) ? (x) : (y))
|
---|
120 | #endif
|
---|
121 | /* compress 512-bits */
|
---|
122 | static int sha256_compress(struct sha256_state *md,
|
---|
123 | unsigned char *buf)
|
---|
124 | {
|
---|
125 | unsigned long S[8], W[64], t0, t1;
|
---|
126 | unsigned long t;
|
---|
127 | int i;
|
---|
128 | /* copy state into S */
|
---|
129 | for(i = 0; i < 8; i++) {
|
---|
130 | S[i] = md->state[i];
|
---|
131 | }
|
---|
132 | /* copy the state into 512-bits into W[0..15] */
|
---|
133 | for(i = 0; i < 16; i++)
|
---|
134 | W[i] = WPA_GET_BE32(buf + (4 * i));
|
---|
135 | /* fill W[16..63] */
|
---|
136 | for(i = 16; i < 64; i++) {
|
---|
137 | W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) +
|
---|
138 | W[i - 16];
|
---|
139 | }
|
---|
140 | /* Compress */
|
---|
141 | #define RND(a,b,c,d,e,f,g,h,i) \
|
---|
142 | t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
|
---|
143 | t1 = Sigma0(a) + Maj(a, b, c); \
|
---|
144 | d += t0; \
|
---|
145 | h = t0 + t1;
|
---|
146 | for(i = 0; i < 64; ++i) {
|
---|
147 | RND(S[0], S[1], S[2], S[3], S[4], S[5], S[6], S[7], i);
|
---|
148 | t = S[7]; S[7] = S[6]; S[6] = S[5]; S[5] = S[4];
|
---|
149 | S[4] = S[3]; S[3] = S[2]; S[2] = S[1]; S[1] = S[0]; S[0] = t;
|
---|
150 | }
|
---|
151 | /* feedback */
|
---|
152 | for(i = 0; i < 8; i++) {
|
---|
153 | md->state[i] = md->state[i] + S[i];
|
---|
154 | }
|
---|
155 | return 0;
|
---|
156 | }
|
---|
157 | /* Initialize the hash state */
|
---|
158 | static void SHA256_Init(struct sha256_state *md)
|
---|
159 | {
|
---|
160 | md->curlen = 0;
|
---|
161 | md->length = 0;
|
---|
162 | md->state[0] = 0x6A09E667UL;
|
---|
163 | md->state[1] = 0xBB67AE85UL;
|
---|
164 | md->state[2] = 0x3C6EF372UL;
|
---|
165 | md->state[3] = 0xA54FF53AUL;
|
---|
166 | md->state[4] = 0x510E527FUL;
|
---|
167 | md->state[5] = 0x9B05688CUL;
|
---|
168 | md->state[6] = 0x1F83D9ABUL;
|
---|
169 | md->state[7] = 0x5BE0CD19UL;
|
---|
170 | }
|
---|
171 | /**
|
---|
172 | Process a block of memory though the hash
|
---|
173 | @param md The hash state
|
---|
174 | @param in The data to hash
|
---|
175 | @param inlen The length of the data (octets)
|
---|
176 | @return CRYPT_OK if successful
|
---|
177 | */
|
---|
178 | static int SHA256_Update(struct sha256_state *md,
|
---|
179 | const unsigned char *in,
|
---|
180 | unsigned long inlen)
|
---|
181 | {
|
---|
182 | unsigned long n;
|
---|
183 | #define block_size 64
|
---|
184 | if(md->curlen > sizeof(md->buf))
|
---|
185 | return -1;
|
---|
186 | while(inlen > 0) {
|
---|
187 | if(md->curlen == 0 && inlen >= block_size) {
|
---|
188 | if(sha256_compress(md, (unsigned char *)in) < 0)
|
---|
189 | return -1;
|
---|
190 | md->length += block_size * 8;
|
---|
191 | in += block_size;
|
---|
192 | inlen -= block_size;
|
---|
193 | }
|
---|
194 | else {
|
---|
195 | n = MIN(inlen, (block_size - md->curlen));
|
---|
196 | memcpy(md->buf + md->curlen, in, n);
|
---|
197 | md->curlen += n;
|
---|
198 | in += n;
|
---|
199 | inlen -= n;
|
---|
200 | if(md->curlen == block_size) {
|
---|
201 | if(sha256_compress(md, md->buf) < 0)
|
---|
202 | return -1;
|
---|
203 | md->length += 8 * block_size;
|
---|
204 | md->curlen = 0;
|
---|
205 | }
|
---|
206 | }
|
---|
207 | }
|
---|
208 | return 0;
|
---|
209 | }
|
---|
210 | /**
|
---|
211 | Terminate the hash to get the digest
|
---|
212 | @param md The hash state
|
---|
213 | @param out [out] The destination of the hash (32 bytes)
|
---|
214 | @return CRYPT_OK if successful
|
---|
215 | */
|
---|
216 | static int SHA256_Final(unsigned char *out,
|
---|
217 | struct sha256_state *md)
|
---|
218 | {
|
---|
219 | int i;
|
---|
220 | if(md->curlen >= sizeof(md->buf))
|
---|
221 | return -1;
|
---|
222 | /* increase the length of the message */
|
---|
223 | md->length += md->curlen * 8;
|
---|
224 | /* append the '1' bit */
|
---|
225 | md->buf[md->curlen++] = (unsigned char)0x80;
|
---|
226 | /* if the length is currently above 56 bytes we append zeros
|
---|
227 | * then compress. Then we can fall back to padding zeros and length
|
---|
228 | * encoding like normal.
|
---|
229 | */
|
---|
230 | if(md->curlen > 56) {
|
---|
231 | while(md->curlen < 64) {
|
---|
232 | md->buf[md->curlen++] = (unsigned char)0;
|
---|
233 | }
|
---|
234 | sha256_compress(md, md->buf);
|
---|
235 | md->curlen = 0;
|
---|
236 | }
|
---|
237 | /* pad upto 56 bytes of zeroes */
|
---|
238 | while(md->curlen < 56) {
|
---|
239 | md->buf[md->curlen++] = (unsigned char)0;
|
---|
240 | }
|
---|
241 | /* store length */
|
---|
242 | WPA_PUT_BE64(md->buf + 56, md->length);
|
---|
243 | sha256_compress(md, md->buf);
|
---|
244 | /* copy output */
|
---|
245 | for(i = 0; i < 8; i++)
|
---|
246 | WPA_PUT_BE32(out + (4 * i), md->state[i]);
|
---|
247 | return 0;
|
---|
248 | }
|
---|
249 | /* ===== end - public domain SHA256 implementation ===== */
|
---|
250 |
|
---|
251 | #endif
|
---|
252 |
|
---|
253 | void Curl_sha256it(unsigned char *outbuffer, /* 32 unsigned chars */
|
---|
254 | const unsigned char *input)
|
---|
255 | {
|
---|
256 | SHA256_CTX ctx;
|
---|
257 | SHA256_Init(&ctx);
|
---|
258 | SHA256_Update(&ctx, input, curlx_uztoui(strlen((char *)input)));
|
---|
259 | SHA256_Final(outbuffer, &ctx);
|
---|
260 | }
|
---|
261 |
|
---|
262 | #endif /* CURL_DISABLE_CRYPTO_AUTH */
|
---|