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5572f482 RL |
1 | /* crypto/engine/hw_cswift.c */ |
2 | /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL | |
3 | * project 2000. | |
4 | */ | |
5 | /* ==================================================================== | |
6 | * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved. | |
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 | * licensing@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 <stdio.h> | |
5be1264b | 60 | #include <string.h> |
5572f482 | 61 | #include <openssl/crypto.h> |
665dc392 | 62 | #include <openssl/buffer.h> |
5572f482 RL |
63 | #include <openssl/dso.h> |
64 | #include <openssl/engine.h> | |
3a87a9b9 GT |
65 | #include <openssl/rsa.h> |
66 | #include <openssl/dsa.h> | |
67 | #include <openssl/dh.h> | |
68 | #include <openssl/rand.h> | |
f15390bd | 69 | #include <openssl/bn.h> |
5572f482 RL |
70 | |
71 | #ifndef OPENSSL_NO_HW | |
72 | #ifndef OPENSSL_NO_HW_CSWIFT | |
73 | ||
74 | /* Attribution notice: Rainbow have generously allowed me to reproduce | |
75 | * the necessary definitions here from their API. This means the support | |
76 | * can build independently of whether application builders have the | |
77 | * API or hardware. This will allow developers to easily produce software | |
78 | * that has latent hardware support for any users that have accelerators | |
79 | * installed, without the developers themselves needing anything extra. | |
80 | * | |
81 | * I have only clipped the parts from the CryptoSwift header files that | |
82 | * are (or seem) relevant to the CryptoSwift support code. This is | |
83 | * simply to keep the file sizes reasonable. | |
84 | * [Geoff] | |
85 | */ | |
86 | #ifdef FLAT_INC | |
87 | #include "cswift.h" | |
88 | #else | |
89 | #include "vendor_defns/cswift.h" | |
90 | #endif | |
91 | ||
92 | #define CSWIFT_LIB_NAME "cswift engine" | |
665dc392 | 93 | #include "e_cswift_err.c" |
5572f482 | 94 | |
fbd78b5c RL |
95 | #define DECIMAL_SIZE(type) ((sizeof(type)*8+2)/3+1) |
96 | ||
5572f482 RL |
97 | static int cswift_destroy(ENGINE *e); |
98 | static int cswift_init(ENGINE *e); | |
99 | static int cswift_finish(ENGINE *e); | |
a99ce1a5 | 100 | static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)); |
5572f482 RL |
101 | |
102 | /* BIGNUM stuff */ | |
103 | static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, | |
104 | const BIGNUM *m, BN_CTX *ctx); | |
105 | static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, | |
106 | const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1, | |
107 | const BIGNUM *iqmp, BN_CTX *ctx); | |
108 | ||
109 | #ifndef OPENSSL_NO_RSA | |
110 | /* RSA stuff */ | |
46ef873f | 111 | static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx); |
5572f482 RL |
112 | #endif |
113 | /* This function is aliased to mod_exp (with the mont stuff dropped). */ | |
114 | static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, | |
115 | const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); | |
116 | ||
117 | #ifndef OPENSSL_NO_DSA | |
118 | /* DSA stuff */ | |
119 | static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa); | |
120 | static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len, | |
121 | DSA_SIG *sig, DSA *dsa); | |
122 | #endif | |
123 | ||
124 | #ifndef OPENSSL_NO_DH | |
125 | /* DH stuff */ | |
126 | /* This function is alised to mod_exp (with the DH and mont dropped). */ | |
127 | static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r, | |
128 | const BIGNUM *a, const BIGNUM *p, | |
129 | const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); | |
130 | #endif | |
131 | ||
132 | /* RAND stuff */ | |
133 | static int cswift_rand_bytes(unsigned char *buf, int num); | |
134 | static int cswift_rand_status(void); | |
135 | ||
136 | /* The definitions for control commands specific to this engine */ | |
137 | #define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE | |
138 | static const ENGINE_CMD_DEFN cswift_cmd_defns[] = { | |
139 | {CSWIFT_CMD_SO_PATH, | |
140 | "SO_PATH", | |
141 | "Specifies the path to the 'cswift' shared library", | |
142 | ENGINE_CMD_FLAG_STRING}, | |
143 | {0, NULL, NULL, 0} | |
144 | }; | |
145 | ||
146 | #ifndef OPENSSL_NO_RSA | |
147 | /* Our internal RSA_METHOD that we provide pointers to */ | |
148 | static RSA_METHOD cswift_rsa = | |
149 | { | |
150 | "CryptoSwift RSA method", | |
151 | NULL, | |
152 | NULL, | |
153 | NULL, | |
154 | NULL, | |
155 | cswift_rsa_mod_exp, | |
156 | cswift_mod_exp_mont, | |
157 | NULL, | |
158 | NULL, | |
159 | 0, | |
160 | NULL, | |
161 | NULL, | |
4ebb5293 | 162 | NULL, |
5572f482 RL |
163 | NULL |
164 | }; | |
165 | #endif | |
166 | ||
167 | #ifndef OPENSSL_NO_DSA | |
168 | /* Our internal DSA_METHOD that we provide pointers to */ | |
169 | static DSA_METHOD cswift_dsa = | |
170 | { | |
171 | "CryptoSwift DSA method", | |
172 | cswift_dsa_sign, | |
173 | NULL, /* dsa_sign_setup */ | |
174 | cswift_dsa_verify, | |
175 | NULL, /* dsa_mod_exp */ | |
176 | NULL, /* bn_mod_exp */ | |
177 | NULL, /* init */ | |
178 | NULL, /* finish */ | |
179 | 0, /* flags */ | |
0e4aa0d2 GT |
180 | NULL, /* app_data */ |
181 | NULL, /* dsa_paramgen */ | |
182 | NULL /* dsa_keygen */ | |
5572f482 RL |
183 | }; |
184 | #endif | |
185 | ||
186 | #ifndef OPENSSL_NO_DH | |
187 | /* Our internal DH_METHOD that we provide pointers to */ | |
188 | static DH_METHOD cswift_dh = | |
189 | { | |
190 | "CryptoSwift DH method", | |
191 | NULL, | |
192 | NULL, | |
193 | cswift_mod_exp_dh, | |
194 | NULL, | |
195 | NULL, | |
196 | 0, | |
0e4aa0d2 | 197 | NULL, |
5572f482 RL |
198 | NULL |
199 | }; | |
200 | #endif | |
201 | ||
202 | static RAND_METHOD cswift_random = | |
203 | { | |
204 | /* "CryptoSwift RAND method", */ | |
205 | NULL, | |
206 | cswift_rand_bytes, | |
207 | NULL, | |
208 | NULL, | |
209 | cswift_rand_bytes, | |
210 | cswift_rand_status, | |
211 | }; | |
212 | ||
213 | ||
214 | /* Constants used when creating the ENGINE */ | |
215 | static const char *engine_cswift_id = "cswift"; | |
216 | static const char *engine_cswift_name = "CryptoSwift hardware engine support"; | |
217 | ||
218 | /* This internal function is used by ENGINE_cswift() and possibly by the | |
219 | * "dynamic" ENGINE support too */ | |
220 | static int bind_helper(ENGINE *e) | |
221 | { | |
222 | #ifndef OPENSSL_NO_RSA | |
223 | const RSA_METHOD *meth1; | |
224 | #endif | |
225 | #ifndef OPENSSL_NO_DH | |
226 | const DH_METHOD *meth2; | |
227 | #endif | |
228 | if(!ENGINE_set_id(e, engine_cswift_id) || | |
229 | !ENGINE_set_name(e, engine_cswift_name) || | |
230 | #ifndef OPENSSL_NO_RSA | |
231 | !ENGINE_set_RSA(e, &cswift_rsa) || | |
232 | #endif | |
233 | #ifndef OPENSSL_NO_DSA | |
234 | !ENGINE_set_DSA(e, &cswift_dsa) || | |
235 | #endif | |
236 | #ifndef OPENSSL_NO_DH | |
237 | !ENGINE_set_DH(e, &cswift_dh) || | |
238 | #endif | |
239 | !ENGINE_set_RAND(e, &cswift_random) || | |
240 | !ENGINE_set_destroy_function(e, cswift_destroy) || | |
241 | !ENGINE_set_init_function(e, cswift_init) || | |
242 | !ENGINE_set_finish_function(e, cswift_finish) || | |
243 | !ENGINE_set_ctrl_function(e, cswift_ctrl) || | |
244 | !ENGINE_set_cmd_defns(e, cswift_cmd_defns)) | |
245 | return 0; | |
246 | ||
247 | #ifndef OPENSSL_NO_RSA | |
248 | /* We know that the "PKCS1_SSLeay()" functions hook properly | |
249 | * to the cswift-specific mod_exp and mod_exp_crt so we use | |
250 | * those functions. NB: We don't use ENGINE_openssl() or | |
251 | * anything "more generic" because something like the RSAref | |
252 | * code may not hook properly, and if you own one of these | |
253 | * cards then you have the right to do RSA operations on it | |
254 | * anyway! */ | |
255 | meth1 = RSA_PKCS1_SSLeay(); | |
256 | cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc; | |
257 | cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec; | |
258 | cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc; | |
259 | cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec; | |
260 | #endif | |
261 | ||
262 | #ifndef OPENSSL_NO_DH | |
263 | /* Much the same for Diffie-Hellman */ | |
264 | meth2 = DH_OpenSSL(); | |
265 | cswift_dh.generate_key = meth2->generate_key; | |
266 | cswift_dh.compute_key = meth2->compute_key; | |
267 | #endif | |
268 | ||
269 | /* Ensure the cswift error handling is set up */ | |
270 | ERR_load_CSWIFT_strings(); | |
271 | return 1; | |
272 | } | |
273 | ||
8f797f14 | 274 | #ifdef OPENSSL_NO_DYNAMIC_ENGINE |
5572f482 RL |
275 | static ENGINE *engine_cswift(void) |
276 | { | |
277 | ENGINE *ret = ENGINE_new(); | |
278 | if(!ret) | |
279 | return NULL; | |
280 | if(!bind_helper(ret)) | |
281 | { | |
282 | ENGINE_free(ret); | |
283 | return NULL; | |
284 | } | |
285 | return ret; | |
286 | } | |
287 | ||
288 | void ENGINE_load_cswift(void) | |
289 | { | |
290 | /* Copied from eng_[openssl|dyn].c */ | |
291 | ENGINE *toadd = engine_cswift(); | |
292 | if(!toadd) return; | |
293 | ENGINE_add(toadd); | |
294 | ENGINE_free(toadd); | |
295 | ERR_clear_error(); | |
296 | } | |
8f797f14 | 297 | #endif |
5572f482 RL |
298 | |
299 | /* This is a process-global DSO handle used for loading and unloading | |
300 | * the CryptoSwift library. NB: This is only set (or unset) during an | |
301 | * init() or finish() call (reference counts permitting) and they're | |
302 | * operating with global locks, so this should be thread-safe | |
303 | * implicitly. */ | |
304 | static DSO *cswift_dso = NULL; | |
305 | ||
306 | /* These are the function pointers that are (un)set when the library has | |
307 | * successfully (un)loaded. */ | |
308 | t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL; | |
309 | t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL; | |
310 | t_swSimpleRequest *p_CSwift_SimpleRequest = NULL; | |
311 | t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL; | |
312 | ||
313 | /* Used in the DSO operations. */ | |
314 | static const char *CSWIFT_LIBNAME = NULL; | |
315 | static const char *get_CSWIFT_LIBNAME(void) | |
316 | { | |
317 | if(CSWIFT_LIBNAME) | |
318 | return CSWIFT_LIBNAME; | |
319 | return "swift"; | |
320 | } | |
321 | static void free_CSWIFT_LIBNAME(void) | |
322 | { | |
323 | if(CSWIFT_LIBNAME) | |
324 | OPENSSL_free((void*)CSWIFT_LIBNAME); | |
325 | CSWIFT_LIBNAME = NULL; | |
326 | } | |
327 | static long set_CSWIFT_LIBNAME(const char *name) | |
328 | { | |
329 | free_CSWIFT_LIBNAME(); | |
330 | return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0); | |
331 | } | |
332 | static const char *CSWIFT_F1 = "swAcquireAccContext"; | |
333 | static const char *CSWIFT_F2 = "swAttachKeyParam"; | |
334 | static const char *CSWIFT_F3 = "swSimpleRequest"; | |
335 | static const char *CSWIFT_F4 = "swReleaseAccContext"; | |
336 | ||
337 | ||
338 | /* CryptoSwift library functions and mechanics - these are used by the | |
339 | * higher-level functions further down. NB: As and where there's no | |
340 | * error checking, take a look lower down where these functions are | |
341 | * called, the checking and error handling is probably down there. */ | |
342 | ||
343 | /* utility function to obtain a context */ | |
344 | static int get_context(SW_CONTEXT_HANDLE *hac) | |
345 | { | |
346 | SW_STATUS status; | |
347 | ||
348 | status = p_CSwift_AcquireAccContext(hac); | |
349 | if(status != SW_OK) | |
350 | return 0; | |
351 | return 1; | |
352 | } | |
353 | ||
354 | /* similarly to release one. */ | |
355 | static void release_context(SW_CONTEXT_HANDLE hac) | |
356 | { | |
357 | p_CSwift_ReleaseAccContext(hac); | |
358 | } | |
359 | ||
360 | /* Destructor (complements the "ENGINE_cswift()" constructor) */ | |
361 | static int cswift_destroy(ENGINE *e) | |
362 | { | |
363 | free_CSWIFT_LIBNAME(); | |
364 | ERR_unload_CSWIFT_strings(); | |
365 | return 1; | |
366 | } | |
367 | ||
368 | /* (de)initialisation functions. */ | |
369 | static int cswift_init(ENGINE *e) | |
370 | { | |
371 | SW_CONTEXT_HANDLE hac; | |
372 | t_swAcquireAccContext *p1; | |
373 | t_swAttachKeyParam *p2; | |
374 | t_swSimpleRequest *p3; | |
375 | t_swReleaseAccContext *p4; | |
376 | ||
377 | if(cswift_dso != NULL) | |
378 | { | |
379 | CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED); | |
380 | goto err; | |
381 | } | |
382 | /* Attempt to load libswift.so/swift.dll/whatever. */ | |
383 | cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0); | |
384 | if(cswift_dso == NULL) | |
385 | { | |
386 | CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED); | |
387 | goto err; | |
388 | } | |
389 | if(!(p1 = (t_swAcquireAccContext *) | |
390 | DSO_bind_func(cswift_dso, CSWIFT_F1)) || | |
391 | !(p2 = (t_swAttachKeyParam *) | |
392 | DSO_bind_func(cswift_dso, CSWIFT_F2)) || | |
393 | !(p3 = (t_swSimpleRequest *) | |
394 | DSO_bind_func(cswift_dso, CSWIFT_F3)) || | |
395 | !(p4 = (t_swReleaseAccContext *) | |
396 | DSO_bind_func(cswift_dso, CSWIFT_F4))) | |
397 | { | |
398 | CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED); | |
399 | goto err; | |
400 | } | |
401 | /* Copy the pointers */ | |
402 | p_CSwift_AcquireAccContext = p1; | |
403 | p_CSwift_AttachKeyParam = p2; | |
404 | p_CSwift_SimpleRequest = p3; | |
405 | p_CSwift_ReleaseAccContext = p4; | |
406 | /* Try and get a context - if not, we may have a DSO but no | |
407 | * accelerator! */ | |
408 | if(!get_context(&hac)) | |
409 | { | |
410 | CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE); | |
411 | goto err; | |
412 | } | |
413 | release_context(hac); | |
414 | /* Everything's fine. */ | |
415 | return 1; | |
416 | err: | |
417 | if(cswift_dso) | |
418 | DSO_free(cswift_dso); | |
419 | p_CSwift_AcquireAccContext = NULL; | |
420 | p_CSwift_AttachKeyParam = NULL; | |
421 | p_CSwift_SimpleRequest = NULL; | |
422 | p_CSwift_ReleaseAccContext = NULL; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static int cswift_finish(ENGINE *e) | |
427 | { | |
428 | free_CSWIFT_LIBNAME(); | |
429 | if(cswift_dso == NULL) | |
430 | { | |
431 | CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED); | |
432 | return 0; | |
433 | } | |
434 | if(!DSO_free(cswift_dso)) | |
435 | { | |
436 | CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE); | |
437 | return 0; | |
438 | } | |
439 | cswift_dso = NULL; | |
440 | p_CSwift_AcquireAccContext = NULL; | |
441 | p_CSwift_AttachKeyParam = NULL; | |
442 | p_CSwift_SimpleRequest = NULL; | |
443 | p_CSwift_ReleaseAccContext = NULL; | |
444 | return 1; | |
445 | } | |
446 | ||
a99ce1a5 | 447 | static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)) |
5572f482 RL |
448 | { |
449 | int initialised = ((cswift_dso == NULL) ? 0 : 1); | |
450 | switch(cmd) | |
451 | { | |
452 | case CSWIFT_CMD_SO_PATH: | |
453 | if(p == NULL) | |
454 | { | |
455 | CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER); | |
456 | return 0; | |
457 | } | |
458 | if(initialised) | |
459 | { | |
460 | CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED); | |
461 | return 0; | |
462 | } | |
463 | return set_CSWIFT_LIBNAME((const char *)p); | |
464 | default: | |
465 | break; | |
466 | } | |
467 | CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED); | |
468 | return 0; | |
469 | } | |
470 | ||
471 | /* Un petit mod_exp */ | |
472 | static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, | |
473 | const BIGNUM *m, BN_CTX *ctx) | |
474 | { | |
475 | /* I need somewhere to store temporary serialised values for | |
476 | * use with the CryptoSwift API calls. A neat cheat - I'll use | |
477 | * BIGNUMs from the BN_CTX but access their arrays directly as | |
478 | * byte arrays <grin>. This way I don't have to clean anything | |
479 | * up. */ | |
480 | BIGNUM *modulus; | |
481 | BIGNUM *exponent; | |
482 | BIGNUM *argument; | |
483 | BIGNUM *result; | |
484 | SW_STATUS sw_status; | |
485 | SW_LARGENUMBER arg, res; | |
486 | SW_PARAM sw_param; | |
487 | SW_CONTEXT_HANDLE hac; | |
488 | int to_return, acquired; | |
489 | ||
490 | modulus = exponent = argument = result = NULL; | |
491 | to_return = 0; /* expect failure */ | |
492 | acquired = 0; | |
493 | ||
494 | if(!get_context(&hac)) | |
495 | { | |
496 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE); | |
497 | goto err; | |
498 | } | |
499 | acquired = 1; | |
500 | /* Prepare the params */ | |
501 | BN_CTX_start(ctx); | |
502 | modulus = BN_CTX_get(ctx); | |
503 | exponent = BN_CTX_get(ctx); | |
504 | argument = BN_CTX_get(ctx); | |
505 | result = BN_CTX_get(ctx); | |
506 | if(!result) | |
507 | { | |
508 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL); | |
509 | goto err; | |
510 | } | |
511 | if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) || | |
512 | !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top)) | |
513 | { | |
514 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL); | |
515 | goto err; | |
516 | } | |
517 | sw_param.type = SW_ALG_EXP; | |
518 | sw_param.up.exp.modulus.nbytes = BN_bn2bin(m, | |
519 | (unsigned char *)modulus->d); | |
520 | sw_param.up.exp.modulus.value = (unsigned char *)modulus->d; | |
521 | sw_param.up.exp.exponent.nbytes = BN_bn2bin(p, | |
522 | (unsigned char *)exponent->d); | |
523 | sw_param.up.exp.exponent.value = (unsigned char *)exponent->d; | |
524 | /* Attach the key params */ | |
525 | sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); | |
526 | switch(sw_status) | |
527 | { | |
528 | case SW_OK: | |
529 | break; | |
530 | case SW_ERR_INPUT_SIZE: | |
531 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE); | |
532 | goto err; | |
533 | default: | |
534 | { | |
535 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
536 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED); | |
537 | sprintf(tmpbuf, "%ld", sw_status); | |
538 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
539 | } | |
540 | goto err; | |
541 | } | |
542 | /* Prepare the argument and response */ | |
543 | arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d); | |
544 | arg.value = (unsigned char *)argument->d; | |
545 | res.nbytes = BN_num_bytes(m); | |
546 | memset(result->d, 0, res.nbytes); | |
547 | res.value = (unsigned char *)result->d; | |
548 | /* Perform the operation */ | |
549 | if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1, | |
550 | &res, 1)) != SW_OK) | |
551 | { | |
552 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
553 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED); | |
554 | sprintf(tmpbuf, "%ld", sw_status); | |
555 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
556 | goto err; | |
557 | } | |
558 | /* Convert the response */ | |
559 | BN_bin2bn((unsigned char *)result->d, res.nbytes, r); | |
560 | to_return = 1; | |
561 | err: | |
562 | if(acquired) | |
563 | release_context(hac); | |
564 | BN_CTX_end(ctx); | |
565 | return to_return; | |
566 | } | |
567 | ||
568 | /* Un petit mod_exp chinois */ | |
569 | static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, | |
570 | const BIGNUM *q, const BIGNUM *dmp1, | |
571 | const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx) | |
572 | { | |
573 | SW_STATUS sw_status; | |
574 | SW_LARGENUMBER arg, res; | |
575 | SW_PARAM sw_param; | |
576 | SW_CONTEXT_HANDLE hac; | |
577 | BIGNUM *rsa_p = NULL; | |
578 | BIGNUM *rsa_q = NULL; | |
579 | BIGNUM *rsa_dmp1 = NULL; | |
580 | BIGNUM *rsa_dmq1 = NULL; | |
581 | BIGNUM *rsa_iqmp = NULL; | |
582 | BIGNUM *argument = NULL; | |
583 | BIGNUM *result = NULL; | |
584 | int to_return = 0; /* expect failure */ | |
585 | int acquired = 0; | |
586 | ||
587 | if(!get_context(&hac)) | |
588 | { | |
589 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE); | |
590 | goto err; | |
591 | } | |
592 | acquired = 1; | |
593 | /* Prepare the params */ | |
594 | BN_CTX_start(ctx); | |
595 | rsa_p = BN_CTX_get(ctx); | |
596 | rsa_q = BN_CTX_get(ctx); | |
597 | rsa_dmp1 = BN_CTX_get(ctx); | |
598 | rsa_dmq1 = BN_CTX_get(ctx); | |
599 | rsa_iqmp = BN_CTX_get(ctx); | |
600 | argument = BN_CTX_get(ctx); | |
601 | result = BN_CTX_get(ctx); | |
602 | if(!result) | |
603 | { | |
604 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL); | |
605 | goto err; | |
606 | } | |
607 | if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) || | |
608 | !bn_wexpand(rsa_dmp1, dmp1->top) || | |
609 | !bn_wexpand(rsa_dmq1, dmq1->top) || | |
610 | !bn_wexpand(rsa_iqmp, iqmp->top) || | |
611 | !bn_wexpand(argument, a->top) || | |
612 | !bn_wexpand(result, p->top + q->top)) | |
613 | { | |
614 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL); | |
615 | goto err; | |
616 | } | |
617 | sw_param.type = SW_ALG_CRT; | |
618 | sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d); | |
619 | sw_param.up.crt.p.value = (unsigned char *)rsa_p->d; | |
620 | sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d); | |
621 | sw_param.up.crt.q.value = (unsigned char *)rsa_q->d; | |
622 | sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1, | |
623 | (unsigned char *)rsa_dmp1->d); | |
624 | sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d; | |
625 | sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1, | |
626 | (unsigned char *)rsa_dmq1->d); | |
627 | sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d; | |
628 | sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp, | |
629 | (unsigned char *)rsa_iqmp->d); | |
630 | sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d; | |
631 | /* Attach the key params */ | |
632 | sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); | |
633 | switch(sw_status) | |
634 | { | |
635 | case SW_OK: | |
636 | break; | |
637 | case SW_ERR_INPUT_SIZE: | |
638 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE); | |
639 | goto err; | |
640 | default: | |
641 | { | |
642 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
643 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED); | |
644 | sprintf(tmpbuf, "%ld", sw_status); | |
645 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
646 | } | |
647 | goto err; | |
648 | } | |
649 | /* Prepare the argument and response */ | |
650 | arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d); | |
651 | arg.value = (unsigned char *)argument->d; | |
652 | res.nbytes = 2 * BN_num_bytes(p); | |
653 | memset(result->d, 0, res.nbytes); | |
654 | res.value = (unsigned char *)result->d; | |
655 | /* Perform the operation */ | |
656 | if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1, | |
657 | &res, 1)) != SW_OK) | |
658 | { | |
659 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
660 | CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED); | |
661 | sprintf(tmpbuf, "%ld", sw_status); | |
662 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
663 | goto err; | |
664 | } | |
665 | /* Convert the response */ | |
666 | BN_bin2bn((unsigned char *)result->d, res.nbytes, r); | |
667 | to_return = 1; | |
668 | err: | |
669 | if(acquired) | |
670 | release_context(hac); | |
671 | BN_CTX_end(ctx); | |
672 | return to_return; | |
673 | } | |
674 | ||
675 | #ifndef OPENSSL_NO_RSA | |
46ef873f | 676 | static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx) |
5572f482 | 677 | { |
5572f482 RL |
678 | int to_return = 0; |
679 | ||
5572f482 RL |
680 | if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) |
681 | { | |
682 | CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS); | |
683 | goto err; | |
684 | } | |
685 | to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1, | |
686 | rsa->dmq1, rsa->iqmp, ctx); | |
687 | err: | |
5572f482 RL |
688 | return to_return; |
689 | } | |
690 | #endif | |
691 | ||
692 | /* This function is aliased to mod_exp (with the mont stuff dropped). */ | |
693 | static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, | |
694 | const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) | |
695 | { | |
696 | return cswift_mod_exp(r, a, p, m, ctx); | |
697 | } | |
698 | ||
699 | #ifndef OPENSSL_NO_DSA | |
700 | static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa) | |
701 | { | |
702 | SW_CONTEXT_HANDLE hac; | |
703 | SW_PARAM sw_param; | |
704 | SW_STATUS sw_status; | |
705 | SW_LARGENUMBER arg, res; | |
706 | unsigned char *ptr; | |
707 | BN_CTX *ctx; | |
708 | BIGNUM *dsa_p = NULL; | |
709 | BIGNUM *dsa_q = NULL; | |
710 | BIGNUM *dsa_g = NULL; | |
711 | BIGNUM *dsa_key = NULL; | |
712 | BIGNUM *result = NULL; | |
713 | DSA_SIG *to_return = NULL; | |
714 | int acquired = 0; | |
715 | ||
716 | if((ctx = BN_CTX_new()) == NULL) | |
717 | goto err; | |
718 | if(!get_context(&hac)) | |
719 | { | |
720 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE); | |
721 | goto err; | |
722 | } | |
723 | acquired = 1; | |
724 | /* Prepare the params */ | |
725 | BN_CTX_start(ctx); | |
726 | dsa_p = BN_CTX_get(ctx); | |
727 | dsa_q = BN_CTX_get(ctx); | |
728 | dsa_g = BN_CTX_get(ctx); | |
729 | dsa_key = BN_CTX_get(ctx); | |
730 | result = BN_CTX_get(ctx); | |
731 | if(!result) | |
732 | { | |
733 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL); | |
734 | goto err; | |
735 | } | |
736 | if(!bn_wexpand(dsa_p, dsa->p->top) || | |
737 | !bn_wexpand(dsa_q, dsa->q->top) || | |
738 | !bn_wexpand(dsa_g, dsa->g->top) || | |
739 | !bn_wexpand(dsa_key, dsa->priv_key->top) || | |
740 | !bn_wexpand(result, dsa->p->top)) | |
741 | { | |
742 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL); | |
743 | goto err; | |
744 | } | |
745 | sw_param.type = SW_ALG_DSA; | |
746 | sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, | |
747 | (unsigned char *)dsa_p->d); | |
748 | sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d; | |
749 | sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, | |
750 | (unsigned char *)dsa_q->d); | |
751 | sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d; | |
752 | sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, | |
753 | (unsigned char *)dsa_g->d); | |
754 | sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d; | |
755 | sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key, | |
756 | (unsigned char *)dsa_key->d); | |
757 | sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d; | |
758 | /* Attach the key params */ | |
759 | sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); | |
760 | switch(sw_status) | |
761 | { | |
762 | case SW_OK: | |
763 | break; | |
764 | case SW_ERR_INPUT_SIZE: | |
765 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE); | |
766 | goto err; | |
767 | default: | |
768 | { | |
769 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
770 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED); | |
771 | sprintf(tmpbuf, "%ld", sw_status); | |
772 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
773 | } | |
774 | goto err; | |
775 | } | |
776 | /* Prepare the argument and response */ | |
777 | arg.nbytes = dlen; | |
778 | arg.value = (unsigned char *)dgst; | |
779 | res.nbytes = BN_num_bytes(dsa->p); | |
780 | memset(result->d, 0, res.nbytes); | |
781 | res.value = (unsigned char *)result->d; | |
782 | /* Perform the operation */ | |
783 | sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1, | |
784 | &res, 1); | |
785 | if(sw_status != SW_OK) | |
786 | { | |
787 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
788 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED); | |
789 | sprintf(tmpbuf, "%ld", sw_status); | |
790 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
791 | goto err; | |
792 | } | |
793 | /* Convert the response */ | |
794 | ptr = (unsigned char *)result->d; | |
795 | if((to_return = DSA_SIG_new()) == NULL) | |
796 | goto err; | |
797 | to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL); | |
798 | to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL); | |
799 | ||
800 | err: | |
801 | if(acquired) | |
802 | release_context(hac); | |
803 | if(ctx) | |
804 | { | |
805 | BN_CTX_end(ctx); | |
806 | BN_CTX_free(ctx); | |
807 | } | |
808 | return to_return; | |
809 | } | |
810 | ||
811 | static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len, | |
812 | DSA_SIG *sig, DSA *dsa) | |
813 | { | |
814 | SW_CONTEXT_HANDLE hac; | |
815 | SW_PARAM sw_param; | |
816 | SW_STATUS sw_status; | |
817 | SW_LARGENUMBER arg[2], res; | |
818 | unsigned long sig_result; | |
819 | BN_CTX *ctx; | |
820 | BIGNUM *dsa_p = NULL; | |
821 | BIGNUM *dsa_q = NULL; | |
822 | BIGNUM *dsa_g = NULL; | |
823 | BIGNUM *dsa_key = NULL; | |
824 | BIGNUM *argument = NULL; | |
825 | int to_return = -1; | |
826 | int acquired = 0; | |
827 | ||
828 | if((ctx = BN_CTX_new()) == NULL) | |
829 | goto err; | |
830 | if(!get_context(&hac)) | |
831 | { | |
832 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE); | |
833 | goto err; | |
834 | } | |
835 | acquired = 1; | |
836 | /* Prepare the params */ | |
837 | BN_CTX_start(ctx); | |
838 | dsa_p = BN_CTX_get(ctx); | |
839 | dsa_q = BN_CTX_get(ctx); | |
840 | dsa_g = BN_CTX_get(ctx); | |
841 | dsa_key = BN_CTX_get(ctx); | |
842 | argument = BN_CTX_get(ctx); | |
843 | if(!argument) | |
844 | { | |
845 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL); | |
846 | goto err; | |
847 | } | |
848 | if(!bn_wexpand(dsa_p, dsa->p->top) || | |
849 | !bn_wexpand(dsa_q, dsa->q->top) || | |
850 | !bn_wexpand(dsa_g, dsa->g->top) || | |
851 | !bn_wexpand(dsa_key, dsa->pub_key->top) || | |
852 | !bn_wexpand(argument, 40)) | |
853 | { | |
854 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL); | |
855 | goto err; | |
856 | } | |
857 | sw_param.type = SW_ALG_DSA; | |
858 | sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p, | |
859 | (unsigned char *)dsa_p->d); | |
860 | sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d; | |
861 | sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q, | |
862 | (unsigned char *)dsa_q->d); | |
863 | sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d; | |
864 | sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g, | |
865 | (unsigned char *)dsa_g->d); | |
866 | sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d; | |
867 | sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key, | |
868 | (unsigned char *)dsa_key->d); | |
869 | sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d; | |
870 | /* Attach the key params */ | |
871 | sw_status = p_CSwift_AttachKeyParam(hac, &sw_param); | |
872 | switch(sw_status) | |
873 | { | |
874 | case SW_OK: | |
875 | break; | |
876 | case SW_ERR_INPUT_SIZE: | |
877 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE); | |
878 | goto err; | |
879 | default: | |
880 | { | |
881 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
882 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED); | |
883 | sprintf(tmpbuf, "%ld", sw_status); | |
884 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
885 | } | |
886 | goto err; | |
887 | } | |
888 | /* Prepare the argument and response */ | |
889 | arg[0].nbytes = dgst_len; | |
890 | arg[0].value = (unsigned char *)dgst; | |
891 | arg[1].nbytes = 40; | |
892 | arg[1].value = (unsigned char *)argument->d; | |
893 | memset(arg[1].value, 0, 40); | |
894 | BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r)); | |
895 | BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s)); | |
896 | res.nbytes = 4; /* unsigned long */ | |
897 | res.value = (unsigned char *)(&sig_result); | |
898 | /* Perform the operation */ | |
899 | sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2, | |
900 | &res, 1); | |
901 | if(sw_status != SW_OK) | |
902 | { | |
903 | char tmpbuf[DECIMAL_SIZE(sw_status)+1]; | |
904 | CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED); | |
905 | sprintf(tmpbuf, "%ld", sw_status); | |
906 | ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf); | |
907 | goto err; | |
908 | } | |
909 | /* Convert the response */ | |
910 | to_return = ((sig_result == 0) ? 0 : 1); | |
911 | ||
912 | err: | |
913 | if(acquired) | |
914 | release_context(hac); | |
915 | if(ctx) | |
916 | { | |
917 | BN_CTX_end(ctx); | |
918 | BN_CTX_free(ctx); | |
919 | } | |
920 | return to_return; | |
921 | } | |
922 | #endif | |
923 | ||
924 | #ifndef OPENSSL_NO_DH | |
925 | /* This function is aliased to mod_exp (with the dh and mont dropped). */ | |
926 | static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r, | |
927 | const BIGNUM *a, const BIGNUM *p, | |
928 | const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) | |
929 | { | |
930 | return cswift_mod_exp(r, a, p, m, ctx); | |
931 | } | |
932 | #endif | |
933 | ||
934 | /* Random bytes are good */ | |
935 | static int cswift_rand_bytes(unsigned char *buf, int num) | |
936 | { | |
937 | SW_CONTEXT_HANDLE hac; | |
938 | SW_STATUS swrc; | |
939 | SW_LARGENUMBER largenum; | |
940 | size_t nbytes = 0; | |
941 | int acquired = 0; | |
942 | int to_return = 0; /* assume failure */ | |
943 | ||
944 | if (!get_context(&hac)) | |
945 | { | |
fbeaa3c4 | 946 | CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_UNIT_FAILURE); |
5572f482 RL |
947 | goto err; |
948 | } | |
949 | acquired = 1; | |
950 | ||
951 | while (nbytes < (size_t)num) | |
952 | { | |
953 | /* tell CryptoSwift how many bytes we want and where we want it. | |
954 | * Note: - CryptoSwift cannot do more than 4096 bytes at a time. | |
955 | * - CryptoSwift can only do multiple of 32-bits. */ | |
956 | largenum.value = (SW_BYTE *) buf + nbytes; | |
957 | if (4096 > num - nbytes) | |
958 | largenum.nbytes = num - nbytes; | |
959 | else | |
960 | largenum.nbytes = 4096; | |
961 | ||
962 | swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1); | |
963 | if (swrc != SW_OK) | |
964 | { | |
965 | char tmpbuf[20]; | |
fbeaa3c4 | 966 | CSWIFTerr(CSWIFT_F_CSWIFT_RAND_BYTES, CSWIFT_R_REQUEST_FAILED); |
5572f482 RL |
967 | sprintf(tmpbuf, "%ld", swrc); |
968 | ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf); | |
969 | goto err; | |
970 | } | |
971 | ||
972 | nbytes += largenum.nbytes; | |
973 | } | |
974 | to_return = 1; /* success */ | |
975 | ||
976 | err: | |
977 | if (acquired) | |
978 | release_context(hac); | |
979 | return to_return; | |
980 | } | |
981 | ||
982 | static int cswift_rand_status(void) | |
983 | { | |
984 | return 1; | |
985 | } | |
986 | ||
987 | ||
988 | /* This stuff is needed if this ENGINE is being compiled into a self-contained | |
989 | * shared-library. */ | |
ecd45314 | 990 | #ifndef OPENSSL_NO_DYNAMIC_ENGINE |
5572f482 RL |
991 | static int bind_fn(ENGINE *e, const char *id) |
992 | { | |
993 | if(id && (strcmp(id, engine_cswift_id) != 0)) | |
994 | return 0; | |
995 | if(!bind_helper(e)) | |
996 | return 0; | |
997 | return 1; | |
998 | } | |
999 | IMPLEMENT_DYNAMIC_CHECK_FN() | |
1000 | IMPLEMENT_DYNAMIC_BIND_FN(bind_fn) | |
ecd45314 | 1001 | #endif /* OPENSSL_NO_DYNAMIC_ENGINE */ |
5572f482 RL |
1002 | |
1003 | #endif /* !OPENSSL_NO_HW_CSWIFT */ | |
1004 | #endif /* !OPENSSL_NO_HW */ |