1 /* SHA512 module */
2
3 /* This module provides an interface to NIST's SHA-512 and SHA-384 Algorithms */
4
5 /* See below for information about the original code this module was
6 based upon. Additional work performed by:
7
8 Andrew Kuchling ([email protected])
9 Greg Stein ([email protected])
10 Trevor Perrin ([email protected])
11
12 Copyright (C) 2005-2007 Gregory P. Smith ([email protected])
13 Licensed to PSF under a Contributor Agreement.
14
15 */
16
17 /* SHA objects */
18 #ifndef Py_BUILD_CORE_BUILTIN
19 # define Py_BUILD_CORE_MODULE 1
20 #endif
21
22 #include "Python.h"
23 #include "pycore_bitutils.h" // _Py_bswap64()
24 #include "pycore_strhex.h" // _Py_strhex()
25 #include "structmember.h" // PyMemberDef
26 #include "hashlib.h"
27
28 /*[clinic input]
29 module _sha512
30 class SHA512Type "SHAobject *" "&PyType_Type"
31 [clinic start generated code]*/
32 /*[clinic end generated code: output=da39a3ee5e6b4b0d input=81a3ccde92bcfe8d]*/
33
34 /* Some useful types */
35
36 typedef unsigned char SHA_BYTE;
37 typedef uint32_t SHA_INT32; /* 32-bit integer */
38 typedef uint64_t SHA_INT64; /* 64-bit integer */
39
40 /* The SHA block size and message digest sizes, in bytes */
41
42 #define SHA_BLOCKSIZE 128
43 #define SHA_DIGESTSIZE 64
44
45 /* The structure for storing SHA info */
46
47 typedef struct {
48 PyObject_HEAD
49 SHA_INT64 digest[8]; /* Message digest */
50 SHA_INT32 count_lo, count_hi; /* 64-bit bit count */
51 SHA_BYTE data[SHA_BLOCKSIZE]; /* SHA data buffer */
52 int local; /* unprocessed amount in data */
53 int digestsize;
54 } SHAobject;
55
56 #include "clinic/sha512module.c.h"
57
58 /* When run on a little-endian CPU we need to perform byte reversal on an
59 array of longwords. */
60
61 #if PY_LITTLE_ENDIAN
longReverse(SHA_INT64 * buffer,int byteCount)62 static void longReverse(SHA_INT64 *buffer, int byteCount)
63 {
64 byteCount /= sizeof(*buffer);
65 for (; byteCount--; buffer++) {
66 *buffer = _Py_bswap64(*buffer);
67 }
68 }
69 #endif
70
SHAcopy(SHAobject * src,SHAobject * dest)71 static void SHAcopy(SHAobject *src, SHAobject *dest)
72 {
73 dest->local = src->local;
74 dest->digestsize = src->digestsize;
75 dest->count_lo = src->count_lo;
76 dest->count_hi = src->count_hi;
77 memcpy(dest->digest, src->digest, sizeof(src->digest));
78 memcpy(dest->data, src->data, sizeof(src->data));
79 }
80
81
82 /* ------------------------------------------------------------------------
83 *
84 * This code for the SHA-512 algorithm was noted as public domain. The
85 * original headers are pasted below.
86 *
87 * Several changes have been made to make it more compatible with the
88 * Python environment and desired interface.
89 *
90 */
91
92 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
93 *
94 * LibTomCrypt is a library that provides various cryptographic
95 * algorithms in a highly modular and flexible manner.
96 *
97 * The library is free for all purposes without any express
98 * guarantee it works.
99 *
100 * Tom St Denis, [email protected], https://www.libtom.net
101 */
102
103
104 /* SHA512 by Tom St Denis */
105
106 /* Various logical functions */
107 #define ROR64(x, y) \
108 ( ((((x) & 0xFFFFFFFFFFFFFFFFULL)>>((unsigned long long)(y) & 63)) | \
109 ((x)<<((unsigned long long)(64-((y) & 63))))) & 0xFFFFFFFFFFFFFFFFULL)
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) ROR64((x),(n))
113 #define R(x, n) (((x) & 0xFFFFFFFFFFFFFFFFULL) >> ((unsigned long long)n))
114 #define Sigma0(x) (S(x, 28) ^ S(x, 34) ^ S(x, 39))
115 #define Sigma1(x) (S(x, 14) ^ S(x, 18) ^ S(x, 41))
116 #define Gamma0(x) (S(x, 1) ^ S(x, 8) ^ R(x, 7))
117 #define Gamma1(x) (S(x, 19) ^ S(x, 61) ^ R(x, 6))
118
119
120 static void
sha512_transform(SHAobject * sha_info)121 sha512_transform(SHAobject *sha_info)
122 {
123 int i;
124 SHA_INT64 S[8], W[80], t0, t1;
125
126 memcpy(W, sha_info->data, sizeof(sha_info->data));
127 #if PY_LITTLE_ENDIAN
128 longReverse(W, (int)sizeof(sha_info->data));
129 #endif
130
131 for (i = 16; i < 80; ++i) {
132 W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
133 }
134 for (i = 0; i < 8; ++i) {
135 S[i] = sha_info->digest[i];
136 }
137
138 /* Compress */
139 #define RND(a,b,c,d,e,f,g,h,i,ki) \
140 t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i]; \
141 t1 = Sigma0(a) + Maj(a, b, c); \
142 d += t0; \
143 h = t0 + t1;
144
145 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98d728ae22ULL);
146 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x7137449123ef65cdULL);
147 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcfec4d3b2fULL);
148 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba58189dbbcULL);
149 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25bf348b538ULL);
150 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1b605d019ULL);
151 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4af194f9bULL);
152 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5da6d8118ULL);
153 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98a3030242ULL);
154 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b0145706fbeULL);
155 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be4ee4b28cULL);
156 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3d5ffb4e2ULL);
157 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74f27b896fULL);
158 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe3b1696b1ULL);
159 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a725c71235ULL);
160 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174cf692694ULL);
161 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c19ef14ad2ULL);
162 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786384f25e3ULL);
163 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc68b8cd5b5ULL);
164 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc77ac9c65ULL);
165 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f592b0275ULL);
166 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa6ea6e483ULL);
167 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dcbd41fbd4ULL);
168 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da831153b5ULL);
169 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152ee66dfabULL);
170 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d2db43210ULL);
171 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c898fb213fULL);
172 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7beef0ee4ULL);
173 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf33da88fc2ULL);
174 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147930aa725ULL);
175 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351e003826fULL);
176 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x142929670a0e6e70ULL);
177 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a8546d22ffcULL);
178 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b21385c26c926ULL);
179 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc5ac42aedULL);
180 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d139d95b3dfULL);
181 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a73548baf63deULL);
182 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb3c77b2a8ULL);
183 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e47edaee6ULL);
184 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c851482353bULL);
185 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a14cf10364ULL);
186 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664bbc423001ULL);
187 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70d0f89791ULL);
188 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a30654be30ULL);
189 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819d6ef5218ULL);
190 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd69906245565a910ULL);
191 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e35855771202aULL);
192 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa07032bbd1b8ULL);
193 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116b8d2d0c8ULL);
194 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c085141ab53ULL);
195 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774cdf8eeb99ULL);
196 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5e19b48a8ULL);
197 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3c5c95a63ULL);
198 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4ae3418acbULL);
199 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f7763e373ULL);
200 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3d6b2b8a3ULL);
201 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee5defb2fcULL);
202 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f43172f60ULL);
203 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814a1f0ab72ULL);
204 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc702081a6439ecULL);
205 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa23631e28ULL);
206 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506cebde82bde9ULL);
207 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7b2c67915ULL);
208 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2e372532bULL);
209 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],64,0xca273eceea26619cULL);
210 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],65,0xd186b8c721c0c207ULL);
211 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],66,0xeada7dd6cde0eb1eULL);
212 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],67,0xf57d4f7fee6ed178ULL);
213 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],68,0x06f067aa72176fbaULL);
214 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],69,0x0a637dc5a2c898a6ULL);
215 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],70,0x113f9804bef90daeULL);
216 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],71,0x1b710b35131c471bULL);
217 RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],72,0x28db77f523047d84ULL);
218 RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],73,0x32caab7b40c72493ULL);
219 RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],74,0x3c9ebe0a15c9bebcULL);
220 RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],75,0x431d67c49c100d4cULL);
221 RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],76,0x4cc5d4becb3e42b6ULL);
222 RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],77,0x597f299cfc657e2aULL);
223 RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],78,0x5fcb6fab3ad6faecULL);
224 RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],79,0x6c44198c4a475817ULL);
225
226 #undef RND
227
228 /* feedback */
229 for (i = 0; i < 8; i++) {
230 sha_info->digest[i] = sha_info->digest[i] + S[i];
231 }
232
233 }
234
235
236
237 /* initialize the SHA digest */
238
239 static void
sha512_init(SHAobject * sha_info)240 sha512_init(SHAobject *sha_info)
241 {
242 sha_info->digest[0] = Py_ULL(0x6a09e667f3bcc908);
243 sha_info->digest[1] = Py_ULL(0xbb67ae8584caa73b);
244 sha_info->digest[2] = Py_ULL(0x3c6ef372fe94f82b);
245 sha_info->digest[3] = Py_ULL(0xa54ff53a5f1d36f1);
246 sha_info->digest[4] = Py_ULL(0x510e527fade682d1);
247 sha_info->digest[5] = Py_ULL(0x9b05688c2b3e6c1f);
248 sha_info->digest[6] = Py_ULL(0x1f83d9abfb41bd6b);
249 sha_info->digest[7] = Py_ULL(0x5be0cd19137e2179);
250 sha_info->count_lo = 0L;
251 sha_info->count_hi = 0L;
252 sha_info->local = 0;
253 sha_info->digestsize = 64;
254 }
255
256 static void
sha384_init(SHAobject * sha_info)257 sha384_init(SHAobject *sha_info)
258 {
259 sha_info->digest[0] = Py_ULL(0xcbbb9d5dc1059ed8);
260 sha_info->digest[1] = Py_ULL(0x629a292a367cd507);
261 sha_info->digest[2] = Py_ULL(0x9159015a3070dd17);
262 sha_info->digest[3] = Py_ULL(0x152fecd8f70e5939);
263 sha_info->digest[4] = Py_ULL(0x67332667ffc00b31);
264 sha_info->digest[5] = Py_ULL(0x8eb44a8768581511);
265 sha_info->digest[6] = Py_ULL(0xdb0c2e0d64f98fa7);
266 sha_info->digest[7] = Py_ULL(0x47b5481dbefa4fa4);
267 sha_info->count_lo = 0L;
268 sha_info->count_hi = 0L;
269 sha_info->local = 0;
270 sha_info->digestsize = 48;
271 }
272
273
274 /* update the SHA digest */
275
276 static void
sha512_update(SHAobject * sha_info,SHA_BYTE * buffer,Py_ssize_t count)277 sha512_update(SHAobject *sha_info, SHA_BYTE *buffer, Py_ssize_t count)
278 {
279 Py_ssize_t i;
280 SHA_INT32 clo;
281
282 clo = sha_info->count_lo + ((SHA_INT32) count << 3);
283 if (clo < sha_info->count_lo) {
284 ++sha_info->count_hi;
285 }
286 sha_info->count_lo = clo;
287 sha_info->count_hi += (SHA_INT32) count >> 29;
288 if (sha_info->local) {
289 i = SHA_BLOCKSIZE - sha_info->local;
290 if (i > count) {
291 i = count;
292 }
293 memcpy(((SHA_BYTE *) sha_info->data) + sha_info->local, buffer, i);
294 count -= i;
295 buffer += i;
296 sha_info->local += (int)i;
297 if (sha_info->local == SHA_BLOCKSIZE) {
298 sha512_transform(sha_info);
299 }
300 else {
301 return;
302 }
303 }
304 while (count >= SHA_BLOCKSIZE) {
305 memcpy(sha_info->data, buffer, SHA_BLOCKSIZE);
306 buffer += SHA_BLOCKSIZE;
307 count -= SHA_BLOCKSIZE;
308 sha512_transform(sha_info);
309 }
310 memcpy(sha_info->data, buffer, count);
311 sha_info->local = (int)count;
312 }
313
314 /* finish computing the SHA digest */
315
316 static void
sha512_final(unsigned char digest[SHA_DIGESTSIZE],SHAobject * sha_info)317 sha512_final(unsigned char digest[SHA_DIGESTSIZE], SHAobject *sha_info)
318 {
319 int count;
320 SHA_INT32 lo_bit_count, hi_bit_count;
321
322 lo_bit_count = sha_info->count_lo;
323 hi_bit_count = sha_info->count_hi;
324 count = (int) ((lo_bit_count >> 3) & 0x7f);
325 ((SHA_BYTE *) sha_info->data)[count++] = 0x80;
326 if (count > SHA_BLOCKSIZE - 16) {
327 memset(((SHA_BYTE *) sha_info->data) + count, 0,
328 SHA_BLOCKSIZE - count);
329 sha512_transform(sha_info);
330 memset((SHA_BYTE *) sha_info->data, 0, SHA_BLOCKSIZE - 16);
331 }
332 else {
333 memset(((SHA_BYTE *) sha_info->data) + count, 0,
334 SHA_BLOCKSIZE - 16 - count);
335 }
336
337 /* GJS: note that we add the hi/lo in big-endian. sha512_transform will
338 swap these values into host-order. */
339 sha_info->data[112] = 0;
340 sha_info->data[113] = 0;
341 sha_info->data[114] = 0;
342 sha_info->data[115] = 0;
343 sha_info->data[116] = 0;
344 sha_info->data[117] = 0;
345 sha_info->data[118] = 0;
346 sha_info->data[119] = 0;
347 sha_info->data[120] = (hi_bit_count >> 24) & 0xff;
348 sha_info->data[121] = (hi_bit_count >> 16) & 0xff;
349 sha_info->data[122] = (hi_bit_count >> 8) & 0xff;
350 sha_info->data[123] = (hi_bit_count >> 0) & 0xff;
351 sha_info->data[124] = (lo_bit_count >> 24) & 0xff;
352 sha_info->data[125] = (lo_bit_count >> 16) & 0xff;
353 sha_info->data[126] = (lo_bit_count >> 8) & 0xff;
354 sha_info->data[127] = (lo_bit_count >> 0) & 0xff;
355 sha512_transform(sha_info);
356 digest[ 0] = (unsigned char) ((sha_info->digest[0] >> 56) & 0xff);
357 digest[ 1] = (unsigned char) ((sha_info->digest[0] >> 48) & 0xff);
358 digest[ 2] = (unsigned char) ((sha_info->digest[0] >> 40) & 0xff);
359 digest[ 3] = (unsigned char) ((sha_info->digest[0] >> 32) & 0xff);
360 digest[ 4] = (unsigned char) ((sha_info->digest[0] >> 24) & 0xff);
361 digest[ 5] = (unsigned char) ((sha_info->digest[0] >> 16) & 0xff);
362 digest[ 6] = (unsigned char) ((sha_info->digest[0] >> 8) & 0xff);
363 digest[ 7] = (unsigned char) ((sha_info->digest[0] ) & 0xff);
364 digest[ 8] = (unsigned char) ((sha_info->digest[1] >> 56) & 0xff);
365 digest[ 9] = (unsigned char) ((sha_info->digest[1] >> 48) & 0xff);
366 digest[10] = (unsigned char) ((sha_info->digest[1] >> 40) & 0xff);
367 digest[11] = (unsigned char) ((sha_info->digest[1] >> 32) & 0xff);
368 digest[12] = (unsigned char) ((sha_info->digest[1] >> 24) & 0xff);
369 digest[13] = (unsigned char) ((sha_info->digest[1] >> 16) & 0xff);
370 digest[14] = (unsigned char) ((sha_info->digest[1] >> 8) & 0xff);
371 digest[15] = (unsigned char) ((sha_info->digest[1] ) & 0xff);
372 digest[16] = (unsigned char) ((sha_info->digest[2] >> 56) & 0xff);
373 digest[17] = (unsigned char) ((sha_info->digest[2] >> 48) & 0xff);
374 digest[18] = (unsigned char) ((sha_info->digest[2] >> 40) & 0xff);
375 digest[19] = (unsigned char) ((sha_info->digest[2] >> 32) & 0xff);
376 digest[20] = (unsigned char) ((sha_info->digest[2] >> 24) & 0xff);
377 digest[21] = (unsigned char) ((sha_info->digest[2] >> 16) & 0xff);
378 digest[22] = (unsigned char) ((sha_info->digest[2] >> 8) & 0xff);
379 digest[23] = (unsigned char) ((sha_info->digest[2] ) & 0xff);
380 digest[24] = (unsigned char) ((sha_info->digest[3] >> 56) & 0xff);
381 digest[25] = (unsigned char) ((sha_info->digest[3] >> 48) & 0xff);
382 digest[26] = (unsigned char) ((sha_info->digest[3] >> 40) & 0xff);
383 digest[27] = (unsigned char) ((sha_info->digest[3] >> 32) & 0xff);
384 digest[28] = (unsigned char) ((sha_info->digest[3] >> 24) & 0xff);
385 digest[29] = (unsigned char) ((sha_info->digest[3] >> 16) & 0xff);
386 digest[30] = (unsigned char) ((sha_info->digest[3] >> 8) & 0xff);
387 digest[31] = (unsigned char) ((sha_info->digest[3] ) & 0xff);
388 digest[32] = (unsigned char) ((sha_info->digest[4] >> 56) & 0xff);
389 digest[33] = (unsigned char) ((sha_info->digest[4] >> 48) & 0xff);
390 digest[34] = (unsigned char) ((sha_info->digest[4] >> 40) & 0xff);
391 digest[35] = (unsigned char) ((sha_info->digest[4] >> 32) & 0xff);
392 digest[36] = (unsigned char) ((sha_info->digest[4] >> 24) & 0xff);
393 digest[37] = (unsigned char) ((sha_info->digest[4] >> 16) & 0xff);
394 digest[38] = (unsigned char) ((sha_info->digest[4] >> 8) & 0xff);
395 digest[39] = (unsigned char) ((sha_info->digest[4] ) & 0xff);
396 digest[40] = (unsigned char) ((sha_info->digest[5] >> 56) & 0xff);
397 digest[41] = (unsigned char) ((sha_info->digest[5] >> 48) & 0xff);
398 digest[42] = (unsigned char) ((sha_info->digest[5] >> 40) & 0xff);
399 digest[43] = (unsigned char) ((sha_info->digest[5] >> 32) & 0xff);
400 digest[44] = (unsigned char) ((sha_info->digest[5] >> 24) & 0xff);
401 digest[45] = (unsigned char) ((sha_info->digest[5] >> 16) & 0xff);
402 digest[46] = (unsigned char) ((sha_info->digest[5] >> 8) & 0xff);
403 digest[47] = (unsigned char) ((sha_info->digest[5] ) & 0xff);
404 digest[48] = (unsigned char) ((sha_info->digest[6] >> 56) & 0xff);
405 digest[49] = (unsigned char) ((sha_info->digest[6] >> 48) & 0xff);
406 digest[50] = (unsigned char) ((sha_info->digest[6] >> 40) & 0xff);
407 digest[51] = (unsigned char) ((sha_info->digest[6] >> 32) & 0xff);
408 digest[52] = (unsigned char) ((sha_info->digest[6] >> 24) & 0xff);
409 digest[53] = (unsigned char) ((sha_info->digest[6] >> 16) & 0xff);
410 digest[54] = (unsigned char) ((sha_info->digest[6] >> 8) & 0xff);
411 digest[55] = (unsigned char) ((sha_info->digest[6] ) & 0xff);
412 digest[56] = (unsigned char) ((sha_info->digest[7] >> 56) & 0xff);
413 digest[57] = (unsigned char) ((sha_info->digest[7] >> 48) & 0xff);
414 digest[58] = (unsigned char) ((sha_info->digest[7] >> 40) & 0xff);
415 digest[59] = (unsigned char) ((sha_info->digest[7] >> 32) & 0xff);
416 digest[60] = (unsigned char) ((sha_info->digest[7] >> 24) & 0xff);
417 digest[61] = (unsigned char) ((sha_info->digest[7] >> 16) & 0xff);
418 digest[62] = (unsigned char) ((sha_info->digest[7] >> 8) & 0xff);
419 digest[63] = (unsigned char) ((sha_info->digest[7] ) & 0xff);
420 }
421
422 /*
423 * End of copied SHA code.
424 *
425 * ------------------------------------------------------------------------
426 */
427
428 typedef struct {
429 PyTypeObject* sha384_type;
430 PyTypeObject* sha512_type;
431 } SHA512State;
432
433 static inline SHA512State*
sha512_get_state(PyObject * module)434 sha512_get_state(PyObject *module)
435 {
436 void *state = PyModule_GetState(module);
437 assert(state != NULL);
438 return (SHA512State *)state;
439 }
440
441 static SHAobject *
newSHA384object(SHA512State * st)442 newSHA384object(SHA512State *st)
443 {
444 SHAobject *sha = (SHAobject *)PyObject_GC_New(SHAobject, st->sha384_type);
445 PyObject_GC_Track(sha);
446 return sha;
447 }
448
449 static SHAobject *
newSHA512object(SHA512State * st)450 newSHA512object(SHA512State *st)
451 {
452 SHAobject *sha = (SHAobject *)PyObject_GC_New(SHAobject, st->sha512_type);
453 PyObject_GC_Track(sha);
454 return sha;
455 }
456
457 /* Internal methods for a hash object */
458 static int
SHA_traverse(PyObject * ptr,visitproc visit,void * arg)459 SHA_traverse(PyObject *ptr, visitproc visit, void *arg)
460 {
461 Py_VISIT(Py_TYPE(ptr));
462 return 0;
463 }
464
465 static void
SHA512_dealloc(PyObject * ptr)466 SHA512_dealloc(PyObject *ptr)
467 {
468 PyTypeObject *tp = Py_TYPE(ptr);
469 PyObject_GC_UnTrack(ptr);
470 PyObject_GC_Del(ptr);
471 Py_DECREF(tp);
472 }
473
474
475 /* External methods for a hash object */
476
477 /*[clinic input]
478 SHA512Type.copy
479
480 cls: defining_class
481
482 Return a copy of the hash object.
483 [clinic start generated code]*/
484
485 static PyObject *
SHA512Type_copy_impl(SHAobject * self,PyTypeObject * cls)486 SHA512Type_copy_impl(SHAobject *self, PyTypeObject *cls)
487 /*[clinic end generated code: output=85ea5b47837a08e6 input=f673a18f66527c90]*/
488 {
489 SHAobject *newobj;
490 SHA512State *st = PyType_GetModuleState(cls);
491
492 if (Py_IS_TYPE((PyObject*)self, st->sha512_type)) {
493 if ( (newobj = newSHA512object(st))==NULL) {
494 return NULL;
495 }
496 }
497 else {
498 if ( (newobj = newSHA384object(st))==NULL) {
499 return NULL;
500 }
501 }
502
503 SHAcopy(self, newobj);
504 return (PyObject *)newobj;
505 }
506
507 /*[clinic input]
508 SHA512Type.digest
509
510 Return the digest value as a bytes object.
511 [clinic start generated code]*/
512
513 static PyObject *
SHA512Type_digest_impl(SHAobject * self)514 SHA512Type_digest_impl(SHAobject *self)
515 /*[clinic end generated code: output=1080bbeeef7dde1b input=f6470dd359071f4b]*/
516 {
517 unsigned char digest[SHA_DIGESTSIZE];
518 SHAobject temp;
519
520 SHAcopy(self, &temp);
521 sha512_final(digest, &temp);
522 return PyBytes_FromStringAndSize((const char *)digest, self->digestsize);
523 }
524
525 /*[clinic input]
526 SHA512Type.hexdigest
527
528 Return the digest value as a string of hexadecimal digits.
529 [clinic start generated code]*/
530
531 static PyObject *
SHA512Type_hexdigest_impl(SHAobject * self)532 SHA512Type_hexdigest_impl(SHAobject *self)
533 /*[clinic end generated code: output=7373305b8601e18b input=498b877b25cbe0a2]*/
534 {
535 unsigned char digest[SHA_DIGESTSIZE];
536 SHAobject temp;
537
538 /* Get the raw (binary) digest value */
539 SHAcopy(self, &temp);
540 sha512_final(digest, &temp);
541
542 return _Py_strhex((const char *)digest, self->digestsize);
543 }
544
545 /*[clinic input]
546 SHA512Type.update
547
548 obj: object
549 /
550
551 Update this hash object's state with the provided string.
552 [clinic start generated code]*/
553
554 static PyObject *
SHA512Type_update(SHAobject * self,PyObject * obj)555 SHA512Type_update(SHAobject *self, PyObject *obj)
556 /*[clinic end generated code: output=1cf333e73995a79e input=ded2b46656566283]*/
557 {
558 Py_buffer buf;
559
560 GET_BUFFER_VIEW_OR_ERROUT(obj, &buf);
561
562 sha512_update(self, buf.buf, buf.len);
563
564 PyBuffer_Release(&buf);
565 Py_RETURN_NONE;
566 }
567
568 static PyMethodDef SHA_methods[] = {
569 SHA512TYPE_COPY_METHODDEF
570 SHA512TYPE_DIGEST_METHODDEF
571 SHA512TYPE_HEXDIGEST_METHODDEF
572 SHA512TYPE_UPDATE_METHODDEF
573 {NULL, NULL} /* sentinel */
574 };
575
576 static PyObject *
SHA512_get_block_size(PyObject * self,void * closure)577 SHA512_get_block_size(PyObject *self, void *closure)
578 {
579 return PyLong_FromLong(SHA_BLOCKSIZE);
580 }
581
582 static PyObject *
SHA512_get_name(PyObject * self,void * closure)583 SHA512_get_name(PyObject *self, void *closure)
584 {
585 if (((SHAobject *)self)->digestsize == 64)
586 return PyUnicode_FromStringAndSize("sha512", 6);
587 else
588 return PyUnicode_FromStringAndSize("sha384", 6);
589 }
590
591 static PyGetSetDef SHA_getseters[] = {
592 {"block_size",
593 (getter)SHA512_get_block_size, NULL,
594 NULL,
595 NULL},
596 {"name",
597 (getter)SHA512_get_name, NULL,
598 NULL,
599 NULL},
600 {NULL} /* Sentinel */
601 };
602
603 static PyMemberDef SHA_members[] = {
604 {"digest_size", T_INT, offsetof(SHAobject, digestsize), READONLY, NULL},
605 {NULL} /* Sentinel */
606 };
607
608 static PyType_Slot sha512_sha384_type_slots[] = {
609 {Py_tp_dealloc, SHA512_dealloc},
610 {Py_tp_methods, SHA_methods},
611 {Py_tp_members, SHA_members},
612 {Py_tp_getset, SHA_getseters},
613 {Py_tp_traverse, SHA_traverse},
614 {0,0}
615 };
616
617 static PyType_Spec sha512_sha384_type_spec = {
618 .name = "_sha512.sha384",
619 .basicsize = sizeof(SHAobject),
620 .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION |
621 Py_TPFLAGS_IMMUTABLETYPE | Py_TPFLAGS_HAVE_GC),
622 .slots = sha512_sha384_type_slots
623 };
624
625 static PyType_Slot sha512_sha512_type_slots[] = {
626 {Py_tp_dealloc, SHA512_dealloc},
627 {Py_tp_methods, SHA_methods},
628 {Py_tp_members, SHA_members},
629 {Py_tp_getset, SHA_getseters},
630 {Py_tp_traverse, SHA_traverse},
631 {0,0}
632 };
633
634 // Using PyType_GetModuleState() on this type is safe since
635 // it cannot be subclassed: it does not have the Py_TPFLAGS_BASETYPE flag.
636 static PyType_Spec sha512_sha512_type_spec = {
637 .name = "_sha512.sha512",
638 .basicsize = sizeof(SHAobject),
639 .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_DISALLOW_INSTANTIATION |
640 Py_TPFLAGS_IMMUTABLETYPE | Py_TPFLAGS_HAVE_GC),
641 .slots = sha512_sha512_type_slots
642 };
643
644 /* The single module-level function: new() */
645
646 /*[clinic input]
647 _sha512.sha512
648
649 string: object(c_default="NULL") = b''
650 *
651 usedforsecurity: bool = True
652
653 Return a new SHA-512 hash object; optionally initialized with a string.
654 [clinic start generated code]*/
655
656 static PyObject *
_sha512_sha512_impl(PyObject * module,PyObject * string,int usedforsecurity)657 _sha512_sha512_impl(PyObject *module, PyObject *string, int usedforsecurity)
658 /*[clinic end generated code: output=a8d9e5f9e6a0831c input=23b4daebc2ebb9c9]*/
659 {
660 SHAobject *new;
661 Py_buffer buf;
662
663 SHA512State *st = sha512_get_state(module);
664
665 if (string)
666 GET_BUFFER_VIEW_OR_ERROUT(string, &buf);
667
668 if ((new = newSHA512object(st)) == NULL) {
669 if (string)
670 PyBuffer_Release(&buf);
671 return NULL;
672 }
673
674 sha512_init(new);
675
676 if (PyErr_Occurred()) {
677 Py_DECREF(new);
678 if (string)
679 PyBuffer_Release(&buf);
680 return NULL;
681 }
682 if (string) {
683 sha512_update(new, buf.buf, buf.len);
684 PyBuffer_Release(&buf);
685 }
686
687 return (PyObject *)new;
688 }
689
690 /*[clinic input]
691 _sha512.sha384
692
693 string: object(c_default="NULL") = b''
694 *
695 usedforsecurity: bool = True
696
697 Return a new SHA-384 hash object; optionally initialized with a string.
698 [clinic start generated code]*/
699
700 static PyObject *
_sha512_sha384_impl(PyObject * module,PyObject * string,int usedforsecurity)701 _sha512_sha384_impl(PyObject *module, PyObject *string, int usedforsecurity)
702 /*[clinic end generated code: output=da7d594a08027ac3 input=59ef72f039a6b431]*/
703 {
704 SHAobject *new;
705 Py_buffer buf;
706
707 SHA512State *st = sha512_get_state(module);
708
709 if (string)
710 GET_BUFFER_VIEW_OR_ERROUT(string, &buf);
711
712 if ((new = newSHA384object(st)) == NULL) {
713 if (string)
714 PyBuffer_Release(&buf);
715 return NULL;
716 }
717
718 sha384_init(new);
719
720 if (PyErr_Occurred()) {
721 Py_DECREF(new);
722 if (string)
723 PyBuffer_Release(&buf);
724 return NULL;
725 }
726 if (string) {
727 sha512_update(new, buf.buf, buf.len);
728 PyBuffer_Release(&buf);
729 }
730
731 return (PyObject *)new;
732 }
733
734
735 /* List of functions exported by this module */
736
737 static struct PyMethodDef SHA_functions[] = {
738 _SHA512_SHA512_METHODDEF
739 _SHA512_SHA384_METHODDEF
740 {NULL, NULL} /* Sentinel */
741 };
742
743 static int
_sha512_traverse(PyObject * module,visitproc visit,void * arg)744 _sha512_traverse(PyObject *module, visitproc visit, void *arg)
745 {
746 SHA512State *state = sha512_get_state(module);
747 Py_VISIT(state->sha384_type);
748 Py_VISIT(state->sha512_type);
749 return 0;
750 }
751
752 static int
_sha512_clear(PyObject * module)753 _sha512_clear(PyObject *module)
754 {
755 SHA512State *state = sha512_get_state(module);
756 Py_CLEAR(state->sha384_type);
757 Py_CLEAR(state->sha512_type);
758 return 0;
759 }
760
761 static void
_sha512_free(void * module)762 _sha512_free(void *module)
763 {
764 _sha512_clear((PyObject *)module);
765 }
766
767
768 /* Initialize this module. */
769 static int
_sha512_exec(PyObject * m)770 _sha512_exec(PyObject *m)
771 {
772 SHA512State* st = sha512_get_state(m);
773
774 st->sha384_type = (PyTypeObject *)PyType_FromModuleAndSpec(
775 m, &sha512_sha384_type_spec, NULL);
776
777 st->sha512_type = (PyTypeObject *)PyType_FromModuleAndSpec(
778 m, &sha512_sha512_type_spec, NULL);
779
780 if (st->sha384_type == NULL || st->sha512_type == NULL) {
781 return -1;
782 }
783
784 Py_INCREF(st->sha384_type);
785 if (PyModule_AddObject(m, "SHA384Type", (PyObject *)st->sha384_type) < 0) {
786 Py_DECREF(st->sha384_type);
787 return -1;
788 }
789
790 Py_INCREF(st->sha512_type);
791 if (PyModule_AddObject(m, "SHA384Type", (PyObject *)st->sha512_type) < 0) {
792 Py_DECREF(st->sha512_type);
793 return -1;
794 }
795
796 return 0;
797 }
798
799 static PyModuleDef_Slot _sha512_slots[] = {
800 {Py_mod_exec, _sha512_exec},
801 {0, NULL}
802 };
803
804 static struct PyModuleDef _sha512module = {
805 PyModuleDef_HEAD_INIT,
806 .m_name = "_sha512",
807 .m_size = sizeof(SHA512State),
808 .m_methods = SHA_functions,
809 .m_slots = _sha512_slots,
810 .m_traverse = _sha512_traverse,
811 .m_clear = _sha512_clear,
812 .m_free = _sha512_free
813 };
814
815 PyMODINIT_FUNC
PyInit__sha512(void)816 PyInit__sha512(void)
817 {
818 return PyModuleDef_Init(&_sha512module);
819 }
820