OpenCoverage

bn_nist.c

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/bn/bn_nist.c

Source code

Switch to Preprocessed file

Line Source Count

1 /* $OpenBSD: bn_nist.c,v 1.18 2016/07/18 01:04:52 bcook Exp $ */ -

2 /* -

3 * Written by Nils Larsch for the OpenSSL project -

4 */ -

5 /* ==================================================================== -

7 * -

8 * Redistribution and use in source and binary forms, with or without -

9 * modification, are permitted provided that the following conditions -

10 * are met: -

11 * -

12 * 1. Redistributions of source code must retain the above copyright -

13 * notice, this list of conditions and the following disclaimer. -

14 * -

15 * 2. Redistributions in binary form must reproduce the above copyright -

16 * notice, this list of conditions and the following disclaimer in -

17 * the documentation and/or other materials provided with the -

18 * distribution. -

19 * -

20 * 3. All advertising materials mentioning features or use of this -

21 * software must display the following acknowledgment: -

22 * "This product includes software developed by the OpenSSL Project -

23 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" -

24 * -

25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to -

26 * endorse or promote products derived from this software without -

27 * prior written permission. For written permission, please contact -

28 * openssl-core@openssl.org. -

29 * -

30 * 5. Products derived from this software may not be called "OpenSSL" -

31 * nor may "OpenSSL" appear in their names without prior written -

32 * permission of the OpenSSL Project. -

33 * -

34 * 6. Redistributions of any form whatsoever must retain the following -

35 * acknowledgment: -

36 * "This product includes software developed by the OpenSSL Project -

37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" -

38 * -

39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY -

40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -

41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -

42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR -

43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -

44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT -

45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -

46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -

47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -

48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -

49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED -

50 * OF THE POSSIBILITY OF SUCH DAMAGE. -

51 * ==================================================================== -

52 * -

53 * This product includes cryptographic software written by Eric Young -

54 * (eay@cryptsoft.com). This product includes software written by Tim -

55 * Hudson (tjh@cryptsoft.com). -

56 * -

57 */ -

58 -

59 #include <machine/endian.h> -

60 -

61 #include <stdint.h> -

62 #include <string.h> -

63 -

64 #include "bn_lcl.h" -

65 -

66 #define BN_NIST_192_TOP (192+BN_BITS2-1)/BN_BITS2 -

67 #define BN_NIST_224_TOP (224+BN_BITS2-1)/BN_BITS2 -

68 #define BN_NIST_256_TOP (256+BN_BITS2-1)/BN_BITS2 -

69 #define BN_NIST_384_TOP (384+BN_BITS2-1)/BN_BITS2 -

70 #define BN_NIST_521_TOP (521+BN_BITS2-1)/BN_BITS2 -

71 -

72 /* pre-computed tables are "carry-less" values of modulus*(i+1) */ -

73 #if BN_BITS2 == 64 -

74 static const BN_ULONG _nist_p_192[][BN_NIST_192_TOP] = { -

75 {0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFFULL}, -

76 {0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFFULL}, -

77 {0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFCULL, 0xFFFFFFFFFFFFFFFFULL} -

78 }; -

79 static const BN_ULONG _nist_p_192_sqr[] = { -

80 0x0000000000000001ULL, 0x0000000000000002ULL, 0x0000000000000001ULL, -

81 0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFFULL -

82 }; -

83 static const BN_ULONG _nist_p_224[][BN_NIST_224_TOP] = { -

84 { -

85 0x0000000000000001ULL, 0xFFFFFFFF00000000ULL, -

86 0xFFFFFFFFFFFFFFFFULL, 0x00000000FFFFFFFFULL -

87 }, -

88 { -

89 0x0000000000000002ULL, 0xFFFFFFFE00000000ULL, -

90 0xFFFFFFFFFFFFFFFFULL, 0x00000001FFFFFFFFULL -

91 } /* this one is "carry-full" */ -

92 }; -

93 static const BN_ULONG _nist_p_224_sqr[] = { -

94 0x0000000000000001ULL, 0xFFFFFFFE00000000ULL, -

95 0xFFFFFFFFFFFFFFFFULL, 0x0000000200000000ULL, -

96 0x0000000000000000ULL, 0xFFFFFFFFFFFFFFFEULL, -

97 0xFFFFFFFFFFFFFFFFULL -

98 }; -

99 static const BN_ULONG _nist_p_256[][BN_NIST_256_TOP] = { -

100 { -

101 0xFFFFFFFFFFFFFFFFULL, 0x00000000FFFFFFFFULL, -

102 0x0000000000000000ULL, 0xFFFFFFFF00000001ULL -

103 }, -

104 { -

105 0xFFFFFFFFFFFFFFFEULL, 0x00000001FFFFFFFFULL, -

106 0x0000000000000000ULL, 0xFFFFFFFE00000002ULL -

107 }, -

108 { -

109 0xFFFFFFFFFFFFFFFDULL, 0x00000002FFFFFFFFULL, -

110 0x0000000000000000ULL, 0xFFFFFFFD00000003ULL -

111 }, -

112 { -

113 0xFFFFFFFFFFFFFFFCULL, 0x00000003FFFFFFFFULL, -

114 0x0000000000000000ULL, 0xFFFFFFFC00000004ULL -

115 }, -

116 { -

117 0xFFFFFFFFFFFFFFFBULL, 0x00000004FFFFFFFFULL, -

118 0x0000000000000000ULL, 0xFFFFFFFB00000005ULL -

119 }, -

120 }; -

121 static const BN_ULONG _nist_p_256_sqr[] = { -

122 0x0000000000000001ULL, 0xFFFFFFFE00000000ULL, -

123 0xFFFFFFFFFFFFFFFFULL, 0x00000001FFFFFFFEULL, -

124 0x00000001FFFFFFFEULL, 0x00000001FFFFFFFEULL, -

125 0xFFFFFFFE00000001ULL, 0xFFFFFFFE00000002ULL -

126 }; -

127 static const BN_ULONG _nist_p_384[][BN_NIST_384_TOP] = { -

128 { -

129 0x00000000FFFFFFFFULL, 0xFFFFFFFF00000000ULL, -

130 0xFFFFFFFFFFFFFFFEULL, 0xFFFFFFFFFFFFFFFFULL, -

131 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL -

132 }, -

133 { -

134 0x00000001FFFFFFFEULL, 0xFFFFFFFE00000000ULL, -

135 0xFFFFFFFFFFFFFFFDULL, 0xFFFFFFFFFFFFFFFFULL, -

136 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL -

137 }, -

138 { -

139 0x00000002FFFFFFFDULL, 0xFFFFFFFD00000000ULL, -

140 0xFFFFFFFFFFFFFFFCULL, 0xFFFFFFFFFFFFFFFFULL, -

141 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL -

142 }, -

143 { -

144 0x00000003FFFFFFFCULL, 0xFFFFFFFC00000000ULL, -

145 0xFFFFFFFFFFFFFFFBULL, 0xFFFFFFFFFFFFFFFFULL, -

146 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL -

147 }, -

148 { -

149 0x00000004FFFFFFFBULL, 0xFFFFFFFB00000000ULL, -

150 0xFFFFFFFFFFFFFFFAULL, 0xFFFFFFFFFFFFFFFFULL, -

151 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL -

152 }, -

153 }; -

154 static const BN_ULONG _nist_p_384_sqr[] = { -

155 0xFFFFFFFE00000001ULL, 0x0000000200000000ULL, 0xFFFFFFFE00000000ULL, -

156 0x0000000200000000ULL, 0x0000000000000001ULL, 0x0000000000000000ULL, -

157 0x00000001FFFFFFFEULL, 0xFFFFFFFE00000000ULL, 0xFFFFFFFFFFFFFFFDULL, -

158 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL -

159 }; -

160 static const BN_ULONG _nist_p_521[] = { -

161 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, -

162 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, -

163 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0x00000000000001FFULL -

164 }; -

165 static const BN_ULONG _nist_p_521_sqr[] = { -

166 0x0000000000000001ULL, 0x0000000000000000ULL, 0x0000000000000000ULL, -

167 0x0000000000000000ULL, 0x0000000000000000ULL, 0x0000000000000000ULL, -

168 0x0000000000000000ULL, 0x0000000000000000ULL, 0xFFFFFFFFFFFFFC00ULL, -

169 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, -

170 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL, -

171 0xFFFFFFFFFFFFFFFFULL, 0x000000000003FFFFULL -

172 }; -

173 #elif BN_BITS2 == 32 -

174 static const BN_ULONG _nist_p_192[][BN_NIST_192_TOP] = { -

175 { -

176 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFF, -

177 0xFFFFFFFF, 0xFFFFFFFF -

178 }, -

179 { -

180 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, -

181 0xFFFFFFFF, 0xFFFFFFFF -

182 }, -

183 { -

184 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFC, 0xFFFFFFFF, -

185 0xFFFFFFFF, 0xFFFFFFFF -

186 } -

187 }; -

188 static const BN_ULONG _nist_p_192_sqr[] = { -

189 0x00000001, 0x00000000, 0x00000002, 0x00000000, 0x00000001, 0x00000000, -

190 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

191 }; -

192 static const BN_ULONG _nist_p_224[][BN_NIST_224_TOP] = { -

193 { -

194 0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFF, -

195 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

196 }, -

197 { -

198 0x00000002, 0x00000000, 0x00000000, 0xFFFFFFFE, -

199 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

200 } -

201 }; -

202 static const BN_ULONG _nist_p_224_sqr[] = { -

203 0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFE, -

204 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000002, -

205 0x00000000, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFF, -

206 0xFFFFFFFF, 0xFFFFFFFF -

207 }; -

208 static const BN_ULONG _nist_p_256[][BN_NIST_256_TOP] = { -

209 { -

210 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, -

211 0x00000000, 0x00000000, 0x00000001, 0xFFFFFFFF -

212 }, -

213 { -

214 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000001, -

215 0x00000000, 0x00000000, 0x00000002, 0xFFFFFFFE -

216 }, -

217 { -

218 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000002, -

219 0x00000000, 0x00000000, 0x00000003, 0xFFFFFFFD -

220 }, -

221 { -

222 0xFFFFFFFC, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000003, -

223 0x00000000, 0x00000000, 0x00000004, 0xFFFFFFFC -

224 }, -

225 { -

226 0xFFFFFFFB, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000004, -

227 0x00000000, 0x00000000, 0x00000005, 0xFFFFFFFB -

228 }, -

229 }; -

230 static const BN_ULONG _nist_p_256_sqr[] = { -

231 0x00000001, 0x00000000, 0x00000000, 0xFFFFFFFE, -

232 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFE, 0x00000001, -

233 0xFFFFFFFE, 0x00000001, 0xFFFFFFFE, 0x00000001, -

234 0x00000001, 0xFFFFFFFE, 0x00000002, 0xFFFFFFFE -

235 }; -

236 static const BN_ULONG _nist_p_384[][BN_NIST_384_TOP] = { -

237 { -

238 0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, -

239 0xFFFFFFFE, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

240 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

241 }, -

242 { -

243 0xFFFFFFFE, 0x00000001, 0x00000000, 0xFFFFFFFE, -

244 0xFFFFFFFD, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

245 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

246 }, -

247 { -

248 0xFFFFFFFD, 0x00000002, 0x00000000, 0xFFFFFFFD, -

249 0xFFFFFFFC, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

250 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

251 }, -

252 { -

253 0xFFFFFFFC, 0x00000003, 0x00000000, 0xFFFFFFFC, -

254 0xFFFFFFFB, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

255 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

256 }, -

257 { -

258 0xFFFFFFFB, 0x00000004, 0x00000000, 0xFFFFFFFB, -

259 0xFFFFFFFA, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

260 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

261 }, -

262 }; -

263 static const BN_ULONG _nist_p_384_sqr[] = { -

264 0x00000001, 0xFFFFFFFE, 0x00000000, 0x00000002, 0x00000000, 0xFFFFFFFE, -

265 0x00000000, 0x00000002, 0x00000001, 0x00000000, 0x00000000, 0x00000000, -

266 0xFFFFFFFE, 0x00000001, 0x00000000, 0xFFFFFFFE, 0xFFFFFFFD, 0xFFFFFFFF, -

267 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF -

268 }; -

269 static const BN_ULONG _nist_p_521[] = { -

270 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

271 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

272 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

273 0xFFFFFFFF, 0x000001FF -

274 }; -

275 static const BN_ULONG _nist_p_521_sqr[] = { -

276 0x00000001, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, -

277 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, -

278 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xFFFFFC00, 0xFFFFFFFF, -

279 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

280 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, -

281 0xFFFFFFFF, 0xFFFFFFFF, 0x0003FFFF -

282 }; -

283 #else -

284 #error "unsupported BN_BITS2" -

285 #endif -

286 -

287 static const BIGNUM _bignum_nist_p_192 = { -

288 (BN_ULONG *)_nist_p_192[0], -

289 BN_NIST_192_TOP, -

290 BN_NIST_192_TOP, -

291 0, -

292 BN_FLG_STATIC_DATA -

293 }; -

294 -

295 static const BIGNUM _bignum_nist_p_224 = { -

296 (BN_ULONG *)_nist_p_224[0], -

297 BN_NIST_224_TOP, -

298 BN_NIST_224_TOP, -

299 0, -

300 BN_FLG_STATIC_DATA -

301 }; -

302 -

303 static const BIGNUM _bignum_nist_p_256 = { -

304 (BN_ULONG *)_nist_p_256[0], -

305 BN_NIST_256_TOP, -

306 BN_NIST_256_TOP, -

307 0, -

308 BN_FLG_STATIC_DATA -

309 }; -

310 -

311 static const BIGNUM _bignum_nist_p_384 = { -

312 (BN_ULONG *)_nist_p_384[0], -

313 BN_NIST_384_TOP, -

314 BN_NIST_384_TOP, -

315 0, -

316 BN_FLG_STATIC_DATA -

317 }; -

318 -

319 static const BIGNUM _bignum_nist_p_521 = { -

320 (BN_ULONG *)_nist_p_521, -

321 BN_NIST_521_TOP, -

322 BN_NIST_521_TOP, -

323 0, -

324 BN_FLG_STATIC_DATA -

325 }; -

326 -

327 -

328 const BIGNUM * -

329 BN_get0_nist_prime_192(void) -

330 { -

331

return &_bignum_nist_p_192;

never executed: return &_bignum_nist_p_192;

332 } -

333 -

334 const BIGNUM * -

335 BN_get0_nist_prime_224(void) -

336 { -

337

return &_bignum_nist_p_224;

never executed: return &_bignum_nist_p_224;

338 } -

339 -

340 const BIGNUM * -

341 BN_get0_nist_prime_256(void) -

342 { -

343

return &_bignum_nist_p_256;

never executed: return &_bignum_nist_p_256;

344 } -

345 -

346 const BIGNUM * -

347 BN_get0_nist_prime_384(void) -

348 { -

349

return &_bignum_nist_p_384;

never executed: return &_bignum_nist_p_384;

350 } -

351 -

352 const BIGNUM * -

353 BN_get0_nist_prime_521(void) -

354 { -

355

return &_bignum_nist_p_521;

never executed: return &_bignum_nist_p_521;

356 } -

357 -

358 static void -

359 nist_cp_bn_0(BN_ULONG *dst, const BN_ULONG *src, int top, int max) -

360 { -

361 int i; -

362 -

363 #ifdef BN_DEBUG -

364 OPENSSL_assert(top <= max); -

365 #endif -

366

for (i = 0; i < top; i++)

i < top	Description
TRUE	never evaluated
FALSE	never evaluated

367

dst[i] = src[i];

never executed: dst[i] = src[i];

368

for (; i < max; i++)

i < max	Description
TRUE	never evaluated
FALSE	never evaluated

369

dst[i] = 0;

never executed: dst[i] = 0;

370

}

never executed: end of block

371 -

372 static void nist_cp_bn(BN_ULONG *dst, const BN_ULONG *src, int top) -

373 { -

374 int i; -

375 -

376

for (i = 0; i < top; i++)

i < top	Description
TRUE	never evaluated
FALSE	never evaluated

377

dst[i] = src[i];

never executed: dst[i] = src[i];

378

}

never executed: end of block

379 -

380 #if BN_BITS2 == 64 -

381 #define bn_cp_64(to, n, from, m) (to)[n] = (m>=0)?((from)[m]):0; -

382 #define bn_64_set_0(to, n) (to)[n] = (BN_ULONG)0; -

383 /* -

384 * two following macros are implemented under assumption that they -

385 * are called in a sequence with *ascending* n, i.e. as they are... -

386 */ -

387 #define bn_cp_32_naked(to, n, from, m) (((n)&1)?(to[(n)/2]|=((m)&1)?(from[(m)/2]&BN_MASK2h):(from[(m)/2]<<32))\ -

388 :(to[(n)/2] =((m)&1)?(from[(m)/2]>>32):(from[(m)/2]&BN_MASK2l))) -

389 #define bn_32_set_0(to, n) (((n)&1)?(to[(n)/2]&=BN_MASK2l):(to[(n)/2]=0)); -

390 #define bn_cp_32(to,n,from,m) ((m)>=0)?bn_cp_32_naked(to,n,from,m):bn_32_set_0(to,n) -

391 # if BYTE_ORDER == LITTLE_ENDIAN -

392 # if defined(_LP64) -

393 # define NIST_INT64 long -

394 # else -

395 # define NIST_INT64 long long -

396 # endif -

397 # endif -

398 #else -

399 #define bn_cp_64(to, n, from, m) \ -

400 { \ -

401 bn_cp_32(to, (n)*2, from, (m)*2); \ -

402 bn_cp_32(to, (n)*2+1, from, (m)*2+1); \ -

403 } -

404 #define bn_64_set_0(to, n) \ -

405 { \ -

406 bn_32_set_0(to, (n)*2); \ -

407 bn_32_set_0(to, (n)*2+1); \ -

408 } -

409 #define bn_cp_32(to, n, from, m) (to)[n] = (m>=0)?((from)[m]):0; -

410 #define bn_32_set_0(to, n) (to)[n] = (BN_ULONG)0; -

411 # if defined(BN_LLONG) -

412 # define NIST_INT64 long long -

413 # endif -

414 #endif /* BN_BITS2 != 64 */ -

415 -

416 #define nist_set_192(to, from, a1, a2, a3) \ -

417 { \ -

418 bn_cp_64(to, 0, from, (a3) - 3) \ -

419 bn_cp_64(to, 1, from, (a2) - 3) \ -

420 bn_cp_64(to, 2, from, (a1) - 3) \ -

421 } -

422 -

423 int -

424 BN_nist_mod_192(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, BN_CTX *ctx) -

425 { -

426 int top = a->top, i; -

427 int carry; -

428 BN_ULONG *r_d, *a_d = a->d; -

429 union { -

430 BN_ULONG bn[BN_NIST_192_TOP]; -

431 unsigned int ui[BN_NIST_192_TOP * -

432 sizeof(BN_ULONG) / sizeof(unsigned int)]; -

433 } buf; -

434 BN_ULONG c_d[BN_NIST_192_TOP], *res; -

435 uintptr_t mask; -

436 static const BIGNUM _bignum_nist_p_192_sqr = { -

437 (BN_ULONG *)_nist_p_192_sqr, -

438 sizeof(_nist_p_192_sqr) / sizeof(_nist_p_192_sqr[0]), -

439 sizeof(_nist_p_192_sqr) / sizeof(_nist_p_192_sqr[0]), -

440 0, -

441 BN_FLG_STATIC_DATA -

442 }; -

443 -

444 field = &_bignum_nist_p_192; /* just to make sure */ -

445 -

446

if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_192_sqr) >= 0)

((a)->neg != 0)	Description
TRUE	never evaluated
FALSE	never evaluated

BN_ucmp(a, &_b..._192_sqr) >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

447

return BN_nnmod(r, a, field, ctx);

never executed: return BN_nnmod(r, a, field, ctx);

448 -

449 i = BN_ucmp(field, a); -

450

if (i == 0) {

i == 0	Description
TRUE	never evaluated
FALSE	never evaluated

451 BN_zero(r); -

452

return 1;

never executed: return 1;

453

} else if (i > 0)

i > 0	Description
TRUE	never evaluated
FALSE	never evaluated

454

return (r == a) ? 1 : (BN_copy(r , a) != NULL);

never executed: return (r == a) ? 1 : (BN_copy(r , a) != ((void *)0) );

(r == a)	Description
TRUE	never evaluated
FALSE	never evaluated

455 -

456

if (r != a) {

r != a	Description
TRUE	never evaluated
FALSE	never evaluated

457

if (!bn_wexpand(r, BN_NIST_192_TOP))

!((((192+64 -1...2+64 -1)/64)))	Description
TRUE	never evaluated
FALSE	never evaluated

(((192+64 -1)/... <= (r)->dmax)	Description
TRUE	never evaluated
FALSE	never evaluated

458

return 0;

never executed: return 0;

459 r_d = r->d; -

460 nist_cp_bn(r_d, a_d, BN_NIST_192_TOP); -

461

} else

never executed: end of block

462

r_d = a_d;

never executed: r_d = a_d;

463 -

464 nist_cp_bn_0(buf.bn, a_d + BN_NIST_192_TOP, top - BN_NIST_192_TOP, -

465 BN_NIST_192_TOP); -

466 -

467 #if defined(NIST_INT64) -

468 { -

469 NIST_INT64 acc; /* accumulator */ -

470 unsigned int *rp = (unsigned int *)r_d; -

471 const unsigned int *bp = (const unsigned int *)buf.ui; -

472 -

473 acc = rp[0]; -

474 acc += bp[3 * 2 - 6]; -

475 acc += bp[5 * 2 - 6]; -

476 rp[0] = (unsigned int)acc; -

477 acc >>= 32; -

478 -

479 acc += rp[1]; -

480 acc += bp[3 * 2 - 5]; -

481 acc += bp[5 * 2 - 5]; -

482 rp[1] = (unsigned int)acc; -

483 acc >>= 32; -

484 -

485 acc += rp[2]; -

486 acc += bp[3 * 2 - 6]; -

487 acc += bp[4 * 2 - 6]; -

488 acc += bp[5 * 2 - 6]; -

489 rp[2] = (unsigned int)acc; -

490 acc >>= 32; -

491 -

492 acc += rp[3]; -

493 acc += bp[3 * 2 - 5]; -

494 acc += bp[4 * 2 - 5]; -

495 acc += bp[5 * 2 - 5]; -

496 rp[3] = (unsigned int)acc; -

497 acc >>= 32; -

498 -

499 acc += rp[4]; -

500 acc += bp[4 * 2 - 6]; -

501 acc += bp[5 * 2 - 6]; -

502 rp[4] = (unsigned int)acc; -

503 acc >>= 32; -

504 -

505 acc += rp[5]; -

506 acc += bp[4 * 2 - 5]; -

507 acc += bp[5 * 2 - 5]; -

508 rp[5] = (unsigned int)acc; -

509 -

510 carry = (int)(acc >> 32); -

511 } -

512 #else -

513 { -

514 BN_ULONG t_d[BN_NIST_192_TOP] = {0}; -

515 -

516 nist_set_192(t_d, buf.bn, 0, 3, 3); -

517 carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP); -

518 nist_set_192(t_d, buf.bn, 4, 4, 0); -

519 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP); -

520 nist_set_192(t_d, buf.bn, 5, 5, 5) -

521 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_192_TOP); -

522 } -

523 #endif -

524

if (carry > 0)

carry > 0	Description
TRUE	never evaluated
FALSE	never evaluated

525

carry = (int)bn_sub_words(r_d, r_d, _nist_p_192[carry - 1],

never executed: carry = (int)bn_sub_words(r_d, r_d, _nist_p_192[carry - 1], (192+64 -1)/64);

526

BN_NIST_192_TOP);

never executed: carry = (int)bn_sub_words(r_d, r_d, _nist_p_192[carry - 1], (192+64 -1)/64);

527 else -

528

carry = 1;

never executed: carry = 1;

529 -

530 /* -

531 * we need 'if (carry==0 || result>=modulus) result-=modulus;' -

532 * as comparison implies subtraction, we can write -

533 * 'tmp=result-modulus; if (!carry || !borrow) result=tmp;' -

534 * this is what happens below, but without explicit if:-) a. -

535 */ -

536 mask = 0 - (uintptr_t)bn_sub_words(c_d, r_d, _nist_p_192[0], -

537 BN_NIST_192_TOP); -

538 mask &= 0 - (uintptr_t)carry; -

539 res = c_d; -

540 res = (BN_ULONG *)(((uintptr_t)res & ~mask) | ((uintptr_t)r_d & mask)); -

541 nist_cp_bn(r_d, res, BN_NIST_192_TOP); -

542 r->top = BN_NIST_192_TOP; -

543

bn_correct_top(r);

never executed: break;

never executed: end of block

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

*(ftl--)	Description
TRUE	never evaluated
FALSE	never evaluated

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

544 -

545

return 1;

never executed: return 1;

546 } -

547 -

548 typedef BN_ULONG (*bn_addsub_f)(BN_ULONG *, const BN_ULONG *, -

549 const BN_ULONG *, int); -

550 -

551 #define nist_set_224(to, from, a1, a2, a3, a4, a5, a6, a7) \ -

552 { \ -

553 bn_cp_32(to, 0, from, (a7) - 7) \ -

554 bn_cp_32(to, 1, from, (a6) - 7) \ -

555 bn_cp_32(to, 2, from, (a5) - 7) \ -

556 bn_cp_32(to, 3, from, (a4) - 7) \ -

557 bn_cp_32(to, 4, from, (a3) - 7) \ -

558 bn_cp_32(to, 5, from, (a2) - 7) \ -

559 bn_cp_32(to, 6, from, (a1) - 7) \ -

560 } -

561 -

562 int -

563 BN_nist_mod_224(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, BN_CTX *ctx) -

564 { -

565 int top = a->top, i; -

566 int carry; -

567 BN_ULONG *r_d, *a_d = a->d; -

568 union { -

569 BN_ULONG bn[BN_NIST_224_TOP]; -

570 unsigned int ui[BN_NIST_224_TOP * -

571 sizeof(BN_ULONG) / sizeof(unsigned int)]; -

572 } buf; -

573 BN_ULONG c_d[BN_NIST_224_TOP], *res; -

574 uintptr_t mask; -

575 union { -

576 bn_addsub_f f; -

577 uintptr_t p; -

578 } u; -

579 static const BIGNUM _bignum_nist_p_224_sqr = { -

580 (BN_ULONG *)_nist_p_224_sqr, -

581 sizeof(_nist_p_224_sqr) / sizeof(_nist_p_224_sqr[0]), -

582 sizeof(_nist_p_224_sqr) / sizeof(_nist_p_224_sqr[0]), -

583 0, -

584 BN_FLG_STATIC_DATA -

585 }; -

586 -

587 field = &_bignum_nist_p_224; /* just to make sure */ -

588 -

589

if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_224_sqr) >= 0)

((a)->neg != 0)	Description
TRUE	never evaluated
FALSE	never evaluated

BN_ucmp(a, &_b..._224_sqr) >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

590

return BN_nnmod(r, a, field, ctx);

never executed: return BN_nnmod(r, a, field, ctx);

591 -

592 i = BN_ucmp(field, a); -

593

if (i == 0) {

i == 0	Description
TRUE	never evaluated
FALSE	never evaluated

594 BN_zero(r); -

595

return 1;

never executed: return 1;

596

} else if (i > 0)

i > 0	Description
TRUE	never evaluated
FALSE	never evaluated

597

return (r == a) ? 1 : (BN_copy(r, a) != NULL);

never executed: return (r == a) ? 1 : (BN_copy(r, a) != ((void *)0) );

(r == a)	Description
TRUE	never evaluated
FALSE	never evaluated

598 -

599

if (r != a) {

r != a	Description
TRUE	never evaluated
FALSE	never evaluated

600

if (!bn_wexpand(r, BN_NIST_224_TOP))

!((((224+64 -1...4+64 -1)/64)))	Description
TRUE	never evaluated
FALSE	never evaluated

(((224+64 -1)/... <= (r)->dmax)	Description
TRUE	never evaluated
FALSE	never evaluated

601

return 0;

never executed: return 0;

602 r_d = r->d; -

603 nist_cp_bn(r_d, a_d, BN_NIST_224_TOP); -

604

} else

never executed: end of block

605

r_d = a_d;

never executed: r_d = a_d;

606 -

607 memset(&buf, 0, sizeof(buf)); -

608 -

609 #if BN_BITS2==64 -

610 /* copy upper 256 bits of 448 bit number ... */ -

611 nist_cp_bn_0(c_d, a_d + (BN_NIST_224_TOP - 1), -

612 top - (BN_NIST_224_TOP - 1), BN_NIST_224_TOP); -

613 /* ... and right shift by 32 to obtain upper 224 bits */ -

614 nist_set_224(buf.bn, c_d, 14, 13, 12, 11, 10, 9, 8); -

615 /* truncate lower part to 224 bits too */ -

616 r_d[BN_NIST_224_TOP - 1] &= BN_MASK2l; -

617 #else -

618 nist_cp_bn_0(buf.bn, a_d + BN_NIST_224_TOP, -

619 top - BN_NIST_224_TOP, BN_NIST_224_TOP); -

620 #endif -

621 -

622 #if defined(NIST_INT64) && BN_BITS2!=64 -

623 { -

624 NIST_INT64 acc; /* accumulator */ -

625 unsigned int *rp = (unsigned int *)r_d; -

626 const unsigned int *bp = (const unsigned int *)buf.ui; -

627 -

628 acc = rp[0]; -

629 acc -= bp[7 - 7]; -

630 acc -= bp[11 - 7]; -

631 rp[0] = (unsigned int)acc; -

632 acc >>= 32; -

633 -

634 acc += rp[1]; -

635 acc -= bp[8 - 7]; -

636 acc -= bp[12 - 7]; -

637 rp[1] = (unsigned int)acc; -

638 acc >>= 32; -

639 -

640 acc += rp[2]; -

641 acc -= bp[9 - 7]; -

642 acc -= bp[13 - 7]; -

643 rp[2] = (unsigned int)acc; -

644 acc >>= 32; -

645 -

646 acc += rp[3]; -

647 acc += bp[7 - 7]; -

648 acc += bp[11 - 7]; -

649 acc -= bp[10 - 7]; -

650 rp[3] = (unsigned int)acc; -

651 acc >>= 32; -

652 -

653 acc += rp[4]; -

654 acc += bp[8 - 7]; -

655 acc += bp[12 - 7]; -

656 acc -= bp[11 - 7]; -

657 rp[4] = (unsigned int)acc; -

658 acc >>= 32; -

659 -

660 acc += rp[5]; -

661 acc += bp[9 - 7]; -

662 acc += bp[13 - 7]; -

663 acc -= bp[12 - 7]; -

664 rp[5] = (unsigned int)acc; -

665 acc >>= 32; -

666 -

667 acc += rp[6]; -

668 acc += bp[10 - 7]; -

669 acc -= bp[13 - 7]; -

670 rp[6] = (unsigned int)acc; -

671 -

672 carry = (int)(acc >> 32); -

673 # if BN_BITS2==64 -

674 rp[7] = carry; -

675 # endif -

676 } -

677 #else -

678 { -

679 BN_ULONG t_d[BN_NIST_224_TOP] = {0}; -

680 -

681 nist_set_224(t_d, buf.bn, 10, 9, 8, 7, 0, 0, 0); -

682 carry = (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP); -

683 nist_set_224(t_d, buf.bn, 0, 13, 12, 11, 0, 0, 0); -

684 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_224_TOP); -

685 nist_set_224(t_d, buf.bn, 13, 12, 11, 10, 9, 8, 7); -

686 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP); -

687 nist_set_224(t_d, buf.bn, 0, 0, 0, 0, 13, 12, 11); -

688 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_224_TOP); -

689 -

690 #if BN_BITS2==64 -

691 carry = (int)(r_d[BN_NIST_224_TOP - 1] >> 32); -

692 #endif -

693 } -

694 #endif -

695 u.f = bn_sub_words; -

696

if (carry > 0) {

carry > 0	Description
TRUE	never evaluated
FALSE	never evaluated

697 carry = (int)bn_sub_words(r_d, r_d, _nist_p_224[carry - 1], -

698 BN_NIST_224_TOP); -

699 #if BN_BITS2==64 -

700 carry = (int)(~(r_d[BN_NIST_224_TOP - 1] >> 32)) & 1; -

701 #endif -

702

} else if (carry < 0) {

never executed: end of block

carry < 0	Description
TRUE	never evaluated
FALSE	never evaluated

703 /* it's a bit more complicated logic in this case. -

704 * if bn_add_words yields no carry, then result -

705 * has to be adjusted by unconditionally *adding* -

706 * the modulus. but if it does, then result has -

707 * to be compared to the modulus and conditionally -

708 * adjusted by *subtracting* the latter. */ -

709 carry = (int)bn_add_words(r_d, r_d, _nist_p_224[-carry - 1], -

710 BN_NIST_224_TOP); -

711 mask = 0 - (uintptr_t)carry; -

712 u.p = ((uintptr_t)bn_sub_words & mask) | -

713 ((uintptr_t)bn_add_words & ~mask); -

714

} else

never executed: end of block

715

carry = 1;

never executed: carry = 1;

716 -

717 /* otherwise it's effectively same as in BN_nist_mod_192... */ -

718 mask = 0 - (uintptr_t)(*u.f)(c_d, r_d, _nist_p_224[0], BN_NIST_224_TOP); -

719 mask &= 0 - (uintptr_t)carry; -

720 res = c_d; -

721 res = (BN_ULONG *)(((uintptr_t)res & ~mask) | ((uintptr_t)r_d & mask)); -

722 nist_cp_bn(r_d, res, BN_NIST_224_TOP); -

723 r->top = BN_NIST_224_TOP; -

724

bn_correct_top(r);

never executed: break;

never executed: end of block

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

*(ftl--)	Description
TRUE	never evaluated
FALSE	never evaluated

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

725 -

726

return 1;

never executed: return 1;

727 } -

728 -

729 #define nist_set_256(to, from, a1, a2, a3, a4, a5, a6, a7, a8) \ -

730 { \ -

731 bn_cp_32(to, 0, from, (a8) - 8) \ -

732 bn_cp_32(to, 1, from, (a7) - 8) \ -

733 bn_cp_32(to, 2, from, (a6) - 8) \ -

734 bn_cp_32(to, 3, from, (a5) - 8) \ -

735 bn_cp_32(to, 4, from, (a4) - 8) \ -

736 bn_cp_32(to, 5, from, (a3) - 8) \ -

737 bn_cp_32(to, 6, from, (a2) - 8) \ -

738 bn_cp_32(to, 7, from, (a1) - 8) \ -

739 } -

740 -

741 int -

742 BN_nist_mod_256(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, BN_CTX *ctx) -

743 { -

744 int i, top = a->top; -

745 int carry = 0; -

746 BN_ULONG *a_d = a->d, *r_d; -

747 union { -

748 BN_ULONG bn[BN_NIST_256_TOP]; -

749 unsigned int ui[BN_NIST_256_TOP * -

750 sizeof(BN_ULONG) / sizeof(unsigned int)]; -

751 } buf; -

752 BN_ULONG c_d[BN_NIST_256_TOP] = {0}, *res; -

753 uintptr_t mask; -

754 union { -

755 bn_addsub_f f; -

756 uintptr_t p; -

757 } u; -

758 static const BIGNUM _bignum_nist_p_256_sqr = { -

759 (BN_ULONG *)_nist_p_256_sqr, -

760 sizeof(_nist_p_256_sqr) / sizeof(_nist_p_256_sqr[0]), -

761 sizeof(_nist_p_256_sqr) / sizeof(_nist_p_256_sqr[0]), -

762 0, -

763 BN_FLG_STATIC_DATA -

764 }; -

765 -

766 field = &_bignum_nist_p_256; /* just to make sure */ -

767 -

768

if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_256_sqr) >= 0)

((a)->neg != 0)	Description
TRUE	never evaluated
FALSE	never evaluated

BN_ucmp(a, &_b..._256_sqr) >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

769

return BN_nnmod(r, a, field, ctx);

never executed: return BN_nnmod(r, a, field, ctx);

770 -

771 i = BN_ucmp(field, a); -

772

if (i == 0) {

i == 0	Description
TRUE	never evaluated
FALSE	never evaluated

773 BN_zero(r); -

774

return 1;

never executed: return 1;

775

} else if (i > 0)

i > 0	Description
TRUE	never evaluated
FALSE	never evaluated

776

return (r == a) ? 1 : (BN_copy(r, a) != NULL);

never executed: return (r == a) ? 1 : (BN_copy(r, a) != ((void *)0) );

(r == a)	Description
TRUE	never evaluated
FALSE	never evaluated

777 -

778

if (r != a) {

r != a	Description
TRUE	never evaluated
FALSE	never evaluated

779

if (!bn_wexpand(r, BN_NIST_256_TOP))

!((((256+64 -1...6+64 -1)/64)))	Description
TRUE	never evaluated
FALSE	never evaluated

(((256+64 -1)/... <= (r)->dmax)	Description
TRUE	never evaluated
FALSE	never evaluated

780

return 0;

never executed: return 0;

781 r_d = r->d; -

782 nist_cp_bn(r_d, a_d, BN_NIST_256_TOP); -

783

} else

never executed: end of block

784

r_d = a_d;

never executed: r_d = a_d;

785 -

786 nist_cp_bn_0(buf.bn, a_d + BN_NIST_256_TOP, -

787 top - BN_NIST_256_TOP, BN_NIST_256_TOP); -

788 -

789 #if defined(NIST_INT64) -

790 { -

791 NIST_INT64 acc; /* accumulator */ -

792 unsigned int *rp = (unsigned int *)r_d; -

793 const unsigned int *bp = (const unsigned int *)buf.ui; -

794 -

795 acc = rp[0]; -

796 acc += bp[8 - 8]; -

797 acc += bp[9 - 8]; -

798 acc -= bp[11 - 8]; -

799 acc -= bp[12 - 8]; -

800 acc -= bp[13 - 8]; -

801 acc -= bp[14 - 8]; -

802 rp[0] = (unsigned int)acc; -

803 acc >>= 32; -

804 -

805 acc += rp[1]; -

806 acc += bp[9 - 8]; -

807 acc += bp[10 - 8]; -

808 acc -= bp[12 - 8]; -

809 acc -= bp[13 - 8]; -

810 acc -= bp[14 - 8]; -

811 acc -= bp[15 - 8]; -

812 rp[1] = (unsigned int)acc; -

813 acc >>= 32; -

814 -

815 acc += rp[2]; -

816 acc += bp[10 - 8]; -

817 acc += bp[11 - 8]; -

818 acc -= bp[13 - 8]; -

819 acc -= bp[14 - 8]; -

820 acc -= bp[15 - 8]; -

821 rp[2] = (unsigned int)acc; -

822 acc >>= 32; -

823 -

824 acc += rp[3]; -

825 acc += bp[11 - 8]; -

826 acc += bp[11 - 8]; -

827 acc += bp[12 - 8]; -

828 acc += bp[12 - 8]; -

829 acc += bp[13 - 8]; -

830 acc -= bp[15 - 8]; -

831 acc -= bp[8 - 8]; -

832 acc -= bp[9 - 8]; -

833 rp[3] = (unsigned int)acc; -

834 acc >>= 32; -

835 -

836 acc += rp[4]; -

837 acc += bp[12 - 8]; -

838 acc += bp[12 - 8]; -

839 acc += bp[13 - 8]; -

840 acc += bp[13 - 8]; -

841 acc += bp[14 - 8]; -

842 acc -= bp[9 - 8]; -

843 acc -= bp[10 - 8]; -

844 rp[4] = (unsigned int)acc; -

845 acc >>= 32; -

846 -

847 acc += rp[5]; -

848 acc += bp[13 - 8]; -

849 acc += bp[13 - 8]; -

850 acc += bp[14 - 8]; -

851 acc += bp[14 - 8]; -

852 acc += bp[15 - 8]; -

853 acc -= bp[10 - 8]; -

854 acc -= bp[11 - 8]; -

855 rp[5] = (unsigned int)acc; -

856 acc >>= 32; -

857 -

858 acc += rp[6]; -

859 acc += bp[14 - 8]; -

860 acc += bp[14 - 8]; -

861 acc += bp[15 - 8]; -

862 acc += bp[15 - 8]; -

863 acc += bp[14 - 8]; -

864 acc += bp[13 - 8]; -

865 acc -= bp[8 - 8]; -

866 acc -= bp[9 - 8]; -

867 rp[6] = (unsigned int)acc; -

868 acc >>= 32; -

869 -

870 acc += rp[7]; -

871 acc += bp[15 - 8]; -

872 acc += bp[15 - 8]; -

873 acc += bp[15 - 8]; -

874 acc += bp[8 - 8]; -

875 acc -= bp[10 - 8]; -

876 acc -= bp[11 - 8]; -

877 acc -= bp[12 - 8]; -

878 acc -= bp[13 - 8]; -

879 rp[7] = (unsigned int)acc; -

880 -

881 carry = (int)(acc >> 32); -

882 } -

883 #else -

884 { -

885 BN_ULONG t_d[BN_NIST_256_TOP] = {0}; -

886 -

887 /*S1*/ -

888 nist_set_256(t_d, buf.bn, 15, 14, 13, 12, 11, 0, 0, 0); -

889 /*S2*/ -

890 nist_set_256(c_d, buf.bn, 0, 15, 14, 13, 12, 0, 0, 0); -

891 carry = (int)bn_add_words(t_d, t_d, c_d, BN_NIST_256_TOP); -

892 /* left shift */ -

893 { -

894 BN_ULONG *ap, t, c; -

895 ap = t_d; -

896 c = 0; -

897 for (i = BN_NIST_256_TOP; i != 0; --i) { -

898 t = *ap; -

899 *(ap++) = ((t << 1) | c) & BN_MASK2; -

900 c = (t & BN_TBIT) ? 1 : 0; -

901 } -

902 carry <<= 1; -

903 carry |= c; -

904 } -

905 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP); -

906 /*S3*/ -

907 nist_set_256(t_d, buf.bn, 15, 14, 0, 0, 0, 10, 9, 8); -

908 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP); -

909 /*S4*/ -

910 nist_set_256(t_d, buf.bn, 8, 13, 15, 14, 13, 11, 10, 9); -

911 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_256_TOP); -

912 /*D1*/ -

913 nist_set_256(t_d, buf.bn, 10, 8, 0, 0, 0, 13, 12, 11); -

914 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); -

915 /*D2*/ -

916 nist_set_256(t_d, buf.bn, 11, 9, 0, 0, 15, 14, 13, 12); -

917 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); -

918 /*D3*/ -

919 nist_set_256(t_d, buf.bn, 12, 0, 10, 9, 8, 15, 14, 13); -

920 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); -

921 /*D4*/ -

922 nist_set_256(t_d, buf.bn, 13, 0, 11, 10, 9, 0, 15, 14); -

923 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_256_TOP); -

924 -

925 } -

926 #endif -

927 /* see BN_nist_mod_224 for explanation */ -

928 u.f = bn_sub_words; -

929

if (carry > 0)

carry > 0	Description
TRUE	never evaluated
FALSE	never evaluated

930

carry = (int)bn_sub_words(r_d, r_d, _nist_p_256[carry - 1],

never executed: carry = (int)bn_sub_words(r_d, r_d, _nist_p_256[carry - 1], (256+64 -1)/64);

931

BN_NIST_256_TOP);

never executed: carry = (int)bn_sub_words(r_d, r_d, _nist_p_256[carry - 1], (256+64 -1)/64);

932

else if (carry < 0) {

carry < 0	Description
TRUE	never evaluated
FALSE	never evaluated

933 carry = (int)bn_add_words(r_d, r_d, _nist_p_256[-carry - 1], -

934 BN_NIST_256_TOP); -

935 mask = 0 - (uintptr_t)carry; -

936 u.p = ((uintptr_t)bn_sub_words & mask) | -

937 ((uintptr_t)bn_add_words & ~mask); -

938

} else

never executed: end of block

939

carry = 1;

never executed: carry = 1;

940 -

941 mask = 0 - (uintptr_t)(*u.f)(c_d, r_d, _nist_p_256[0], BN_NIST_256_TOP); -

942 mask &= 0 - (uintptr_t)carry; -

943 res = c_d; -

944 res = (BN_ULONG *)(((uintptr_t)res & ~mask) | ((uintptr_t)r_d & mask)); -

945 nist_cp_bn(r_d, res, BN_NIST_256_TOP); -

946 r->top = BN_NIST_256_TOP; -

947

bn_correct_top(r);

never executed: break;

never executed: end of block

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

*(ftl--)	Description
TRUE	never evaluated
FALSE	never evaluated

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

948 -

949

return 1;

never executed: return 1;

950 } -

951 -

952 #define nist_set_384(to,from,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) \ -

953 { \ -

954 bn_cp_32(to, 0, from, (a12) - 12) \ -

955 bn_cp_32(to, 1, from, (a11) - 12) \ -

956 bn_cp_32(to, 2, from, (a10) - 12) \ -

957 bn_cp_32(to, 3, from, (a9) - 12) \ -

958 bn_cp_32(to, 4, from, (a8) - 12) \ -

959 bn_cp_32(to, 5, from, (a7) - 12) \ -

960 bn_cp_32(to, 6, from, (a6) - 12) \ -

961 bn_cp_32(to, 7, from, (a5) - 12) \ -

962 bn_cp_32(to, 8, from, (a4) - 12) \ -

963 bn_cp_32(to, 9, from, (a3) - 12) \ -

964 bn_cp_32(to, 10, from, (a2) - 12) \ -

965 bn_cp_32(to, 11, from, (a1) - 12) \ -

966 } -

967 -

968 int -

969 BN_nist_mod_384(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, BN_CTX *ctx) -

970 { -

971 int i, top = a->top; -

972 int carry = 0; -

973 BN_ULONG *r_d, *a_d = a->d; -

974 union { -

975 BN_ULONG bn[BN_NIST_384_TOP]; -

976 unsigned int ui[BN_NIST_384_TOP * -

977 sizeof(BN_ULONG) / sizeof(unsigned int)]; -

978 } buf; -

979 BN_ULONG c_d[BN_NIST_384_TOP], *res; -

980 uintptr_t mask; -

981 union { -

982 bn_addsub_f f; -

983 uintptr_t p; -

984 } u; -

985 static const BIGNUM _bignum_nist_p_384_sqr = { -

986 (BN_ULONG *)_nist_p_384_sqr, -

987 sizeof(_nist_p_384_sqr) / sizeof(_nist_p_384_sqr[0]), -

988 sizeof(_nist_p_384_sqr) / sizeof(_nist_p_384_sqr[0]), -

989 0, -

990 BN_FLG_STATIC_DATA -

991 }; -

992 -

993 field = &_bignum_nist_p_384; /* just to make sure */ -

994 -

995

if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_384_sqr) >= 0)

((a)->neg != 0)	Description
TRUE	never evaluated
FALSE	never evaluated

BN_ucmp(a, &_b..._384_sqr) >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

996

return BN_nnmod(r, a, field, ctx);

never executed: return BN_nnmod(r, a, field, ctx);

997 -

998 i = BN_ucmp(field, a); -

999

if (i == 0) {

i == 0	Description
TRUE	never evaluated
FALSE	never evaluated

1000 BN_zero(r); -

1001

return 1;

never executed: return 1;

1002

} else if (i > 0)

i > 0	Description
TRUE	never evaluated
FALSE	never evaluated

1003

return (r == a) ? 1 : (BN_copy(r, a) != NULL);

never executed: return (r == a) ? 1 : (BN_copy(r, a) != ((void *)0) );

(r == a)	Description
TRUE	never evaluated
FALSE	never evaluated

1004 -

1005

if (r != a) {

r != a	Description
TRUE	never evaluated
FALSE	never evaluated

1006

if (!bn_wexpand(r, BN_NIST_384_TOP))

!((((384+64 -1...4+64 -1)/64)))	Description
TRUE	never evaluated
FALSE	never evaluated

(((384+64 -1)/... <= (r)->dmax)	Description
TRUE	never evaluated
FALSE	never evaluated

1007

return 0;

never executed: return 0;

1008 r_d = r->d; -

1009 nist_cp_bn(r_d, a_d, BN_NIST_384_TOP); -

1010

} else

never executed: end of block

1011

r_d = a_d;

never executed: r_d = a_d;

1012 -

1013 nist_cp_bn_0(buf.bn, a_d + BN_NIST_384_TOP, -

1014 top - BN_NIST_384_TOP, BN_NIST_384_TOP); -

1015 -

1016 #if defined(NIST_INT64) -

1017 { -

1018 NIST_INT64 acc; /* accumulator */ -

1019 unsigned int *rp = (unsigned int *)r_d; -

1020 const unsigned int *bp = (const unsigned int *)buf.ui; -

1021 -

1022 acc = rp[0]; -

1023 acc += bp[12 - 12]; -

1024 acc += bp[21 - 12]; -

1025 acc += bp[20 - 12]; -

1026 acc -= bp[23 - 12]; -

1027 rp[0] = (unsigned int)acc; -

1028 acc >>= 32; -

1029 -

1030 acc += rp[1]; -

1031 acc += bp[13 - 12]; -

1032 acc += bp[22 - 12]; -

1033 acc += bp[23 - 12]; -

1034 acc -= bp[12 - 12]; -

1035 acc -= bp[20 - 12]; -

1036 rp[1] = (unsigned int)acc; -

1037 acc >>= 32; -

1038 -

1039 acc += rp[2]; -

1040 acc += bp[14 - 12]; -

1041 acc += bp[23 - 12]; -

1042 acc -= bp[13 - 12]; -

1043 acc -= bp[21 - 12]; -

1044 rp[2] = (unsigned int)acc; -

1045 acc >>= 32; -

1046 -

1047 acc += rp[3]; -

1048 acc += bp[15 - 12]; -

1049 acc += bp[12 - 12]; -

1050 acc += bp[20 - 12]; -

1051 acc += bp[21 - 12]; -

1052 acc -= bp[14 - 12]; -

1053 acc -= bp[22 - 12]; -

1054 acc -= bp[23 - 12]; -

1055 rp[3] = (unsigned int)acc; -

1056 acc >>= 32; -

1057 -

1058 acc += rp[4]; -

1059 acc += bp[21 - 12]; -

1060 acc += bp[21 - 12]; -

1061 acc += bp[16 - 12]; -

1062 acc += bp[13 - 12]; -

1063 acc += bp[12 - 12]; -

1064 acc += bp[20 - 12]; -

1065 acc += bp[22 - 12]; -

1066 acc -= bp[15 - 12]; -

1067 acc -= bp[23 - 12]; -

1068 acc -= bp[23 - 12]; -

1069 rp[4] = (unsigned int)acc; -

1070 acc >>= 32; -

1071 -

1072 acc += rp[5]; -

1073 acc += bp[22 - 12]; -

1074 acc += bp[22 - 12]; -

1075 acc += bp[17 - 12]; -

1076 acc += bp[14 - 12]; -

1077 acc += bp[13 - 12]; -

1078 acc += bp[21 - 12]; -

1079 acc += bp[23 - 12]; -

1080 acc -= bp[16 - 12]; -

1081 rp[5] = (unsigned int)acc; -

1082 acc >>= 32; -

1083 -

1084 acc += rp[6]; -

1085 acc += bp[23 - 12]; -

1086 acc += bp[23 - 12]; -

1087 acc += bp[18 - 12]; -

1088 acc += bp[15 - 12]; -

1089 acc += bp[14 - 12]; -

1090 acc += bp[22 - 12]; -

1091 acc -= bp[17 - 12]; -

1092 rp[6] = (unsigned int)acc; -

1093 acc >>= 32; -

1094 -

1095 acc += rp[7]; -

1096 acc += bp[19 - 12]; -

1097 acc += bp[16 - 12]; -

1098 acc += bp[15 - 12]; -

1099 acc += bp[23 - 12]; -

1100 acc -= bp[18 - 12]; -

1101 rp[7] = (unsigned int)acc; -

1102 acc >>= 32; -

1103 -

1104 acc += rp[8]; -

1105 acc += bp[20 - 12]; -

1106 acc += bp[17 - 12]; -

1107 acc += bp[16 - 12]; -

1108 acc -= bp[19 - 12]; -

1109 rp[8] = (unsigned int)acc; -

1110 acc >>= 32; -

1111 -

1112 acc += rp[9]; -

1113 acc += bp[21 - 12]; -

1114 acc += bp[18 - 12]; -

1115 acc += bp[17 - 12]; -

1116 acc -= bp[20 - 12]; -

1117 rp[9] = (unsigned int)acc; -

1118 acc >>= 32; -

1119 -

1120 acc += rp[10]; -

1121 acc += bp[22 - 12]; -

1122 acc += bp[19 - 12]; -

1123 acc += bp[18 - 12]; -

1124 acc -= bp[21 - 12]; -

1125 rp[10] = (unsigned int)acc; -

1126 acc >>= 32; -

1127 -

1128 acc += rp[11]; -

1129 acc += bp[23 - 12]; -

1130 acc += bp[20 - 12]; -

1131 acc += bp[19 - 12]; -

1132 acc -= bp[22 - 12]; -

1133 rp[11] = (unsigned int)acc; -

1134 -

1135 carry = (int)(acc >> 32); -

1136 } -

1137 #else -

1138 { -

1139 BN_ULONG t_d[BN_NIST_384_TOP] = {0}; -

1140 -

1141 /*S1*/ -

1142 nist_set_256(t_d, buf.bn, 0, 0, 0, 0, 0, 23 - 4, 22 - 4, -

1143 21 - 4); -

1144 /* left shift */ -

1145 { -

1146 BN_ULONG *ap, t, c; -

1147 ap = t_d; -

1148 c = 0; -

1149 for (i = 3; i != 0; --i) { -

1150 t= *ap; -

1151 *(ap++) = ((t << 1)|c) & BN_MASK2; -

1152 c = (t & BN_TBIT) ? 1 : 0; -

1153 } -

1154 *ap = c; -

1155 } -

1156 carry = (int)bn_add_words(r_d + (128 / BN_BITS2), -

1157 r_d + (128 / BN_BITS2), t_d, BN_NIST_256_TOP); -

1158 /*S2 */ -

1159 carry += (int)bn_add_words(r_d, r_d, buf.bn, BN_NIST_384_TOP); -

1160 /*S3*/ -

1161 nist_set_384(t_d, buf.bn, 20, 19, 18, 17, 16, 15, 14, 13, 12, -

1162 23, 22, 21); -

1163 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); -

1164 /*S4*/ -

1165 nist_set_384(t_d, buf.bn, 19, 18, 17, 16, 15, 14, 13, 12, 20, -

1166 0, 23, 0); -

1167 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); -

1168 /*S5*/ -

1169 nist_set_384(t_d, buf.bn, 0,0, 0,0, 23, 22, 21, 20, 0,0, 0, 0); -

1170 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); -

1171 /*S6*/ -

1172 nist_set_384(t_d, buf.bn, 0,0, 0,0, 0,0, 23, 22, 21, 0,0, 20); -

1173 carry += (int)bn_add_words(r_d, r_d, t_d, BN_NIST_384_TOP); -

1174 /*D1*/ -

1175 nist_set_384(t_d, buf.bn, 22, 21, 20, 19, 18, 17, 16, 15, 14, -

1176 13, 12, 23); -

1177 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP); -

1178 /*D2*/ -

1179 nist_set_384(t_d, buf.bn, 0,0, 0,0, 0,0, 0,23, 22, 21, 20, 0); -

1180 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP); -

1181 /*D3*/ -

1182 nist_set_384(t_d, buf.bn, 0,0, 0,0, 0,0, 0,23, 23, 0,0, 0); -

1183 carry -= (int)bn_sub_words(r_d, r_d, t_d, BN_NIST_384_TOP); -

1184 -

1185 } -

1186 #endif -

1187 /* see BN_nist_mod_224 for explanation */ -

1188 u.f = bn_sub_words; -

1189

if (carry > 0)

carry > 0	Description
TRUE	never evaluated
FALSE	never evaluated

1190

carry = (int)bn_sub_words(r_d, r_d, _nist_p_384[carry - 1],

never executed: carry = (int)bn_sub_words(r_d, r_d, _nist_p_384[carry - 1], (384+64 -1)/64);

1191

BN_NIST_384_TOP);

never executed: carry = (int)bn_sub_words(r_d, r_d, _nist_p_384[carry - 1], (384+64 -1)/64);

1192

else if (carry < 0) {

carry < 0	Description
TRUE	never evaluated
FALSE	never evaluated

1193 carry = (int)bn_add_words(r_d, r_d, _nist_p_384[-carry - 1], -

1194 BN_NIST_384_TOP); -

1195 mask = 0 - (uintptr_t)carry; -

1196 u.p = ((uintptr_t)bn_sub_words & mask) | -

1197 ((uintptr_t)bn_add_words & ~mask); -

1198

} else

never executed: end of block

1199

carry = 1;

never executed: carry = 1;

1200 -

1201 mask = 0 - (uintptr_t)(*u.f)(c_d, r_d, _nist_p_384[0], BN_NIST_384_TOP); -

1202 mask &= 0 - (uintptr_t)carry; -

1203 res = c_d; -

1204 res = (BN_ULONG *)(((uintptr_t)res & ~mask) | ((uintptr_t)r_d & mask)); -

1205 nist_cp_bn(r_d, res, BN_NIST_384_TOP); -

1206 r->top = BN_NIST_384_TOP; -

1207

bn_correct_top(r);

never executed: break;

never executed: end of block

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

*(ftl--)	Description
TRUE	never evaluated
FALSE	never evaluated

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

1208 -

1209

return 1;

never executed: return 1;

1210 } -

1211 -

1212 #define BN_NIST_521_RSHIFT (521%BN_BITS2) -

1213 #define BN_NIST_521_LSHIFT (BN_BITS2-BN_NIST_521_RSHIFT) -

1214 #define BN_NIST_521_TOP_MASK ((BN_ULONG)BN_MASK2>>BN_NIST_521_LSHIFT) -

1215 -

1216 int -

1217 BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field, BN_CTX *ctx) -

1218 { -

1219 int top = a->top, i; -

1220 BN_ULONG *r_d, *a_d = a->d, t_d[BN_NIST_521_TOP], val, tmp, *res; -

1221 uintptr_t mask; -

1222 static const BIGNUM _bignum_nist_p_521_sqr = { -

1223 (BN_ULONG *)_nist_p_521_sqr, -

1224 sizeof(_nist_p_521_sqr) / sizeof(_nist_p_521_sqr[0]), -

1225 sizeof(_nist_p_521_sqr) / sizeof(_nist_p_521_sqr[0]), -

1226 0, -

1227 BN_FLG_STATIC_DATA -

1228 }; -

1229 -

1230 field = &_bignum_nist_p_521; /* just to make sure */ -

1231 -

1232

if (BN_is_negative(a) || BN_ucmp(a, &_bignum_nist_p_521_sqr) >= 0)

((a)->neg != 0)	Description
TRUE	never evaluated
FALSE	never evaluated

BN_ucmp(a, &_b..._521_sqr) >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

1233

return BN_nnmod(r, a, field, ctx);

never executed: return BN_nnmod(r, a, field, ctx);

1234 -

1235 i = BN_ucmp(field, a); -

1236

if (i == 0) {

i == 0	Description
TRUE	never evaluated
FALSE	never evaluated

1237 BN_zero(r); -

1238

return 1;

never executed: return 1;

1239

} else if (i > 0)

i > 0	Description
TRUE	never evaluated
FALSE	never evaluated

1240

return (r == a) ? 1 : (BN_copy(r, a) != NULL);

never executed: return (r == a) ? 1 : (BN_copy(r, a) != ((void *)0) );

(r == a)	Description
TRUE	never evaluated
FALSE	never evaluated

1241 -

1242

if (r != a) {

r != a	Description
TRUE	never evaluated
FALSE	never evaluated

1243

if (!bn_wexpand(r, BN_NIST_521_TOP))

!((((521+64 -1...1+64 -1)/64)))	Description
TRUE	never evaluated
FALSE	never evaluated

(((521+64 -1)/... <= (r)->dmax)	Description
TRUE	never evaluated
FALSE	never evaluated

1244

return 0;

never executed: return 0;

1245 r_d = r->d; -

1246 nist_cp_bn(r_d, a_d, BN_NIST_521_TOP); -

1247

} else

never executed: end of block

1248

r_d = a_d;

never executed: r_d = a_d;

1249 -

1250 /* upper 521 bits, copy ... */ -

1251 nist_cp_bn_0(t_d, a_d + (BN_NIST_521_TOP - 1), -

1252 top - (BN_NIST_521_TOP - 1), BN_NIST_521_TOP); -

1253 /* ... and right shift */ -

1254

for (val = t_d[0], i = 0; i < BN_NIST_521_TOP - 1; i++) {

i < (521+64 -1)/64 - 1	Description
TRUE	never evaluated
FALSE	never evaluated

1255 tmp = val >> BN_NIST_521_RSHIFT; -

1256 val = t_d[i + 1]; -

1257 t_d[i] = (tmp | val << BN_NIST_521_LSHIFT) & BN_MASK2; -

1258

}

never executed: end of block

1259 t_d[i] = val >> BN_NIST_521_RSHIFT; -

1260 /* lower 521 bits */ -

1261 r_d[i] &= BN_NIST_521_TOP_MASK; -

1262 -

1263 bn_add_words(r_d, r_d, t_d, BN_NIST_521_TOP); -

1264 mask = 0 - (uintptr_t)bn_sub_words(t_d, r_d, _nist_p_521, -

1265 BN_NIST_521_TOP); -

1266 res = t_d; -

1267 res = (BN_ULONG *)(((uintptr_t)res & ~mask) | ((uintptr_t)r_d & mask)); -

1268 nist_cp_bn(r_d, res, BN_NIST_521_TOP); -

1269 r->top = BN_NIST_521_TOP; -

1270

bn_correct_top(r);

never executed: break;

never executed: end of block

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

*(ftl--)	Description
TRUE	never evaluated
FALSE	never evaluated

tmp_top > 0	Description
TRUE	never evaluated
FALSE	never evaluated

1271 -

1272

return 1;

never executed: return 1;

1273 } -

Source code

Switch to Preprocessed file

Generated by Squish Coco 4.2.2