Coverage Report

Created: 2024-11-21 07:03

/src/openssl/crypto/evp/m_sigver.c
Line
Count
Source (jump to first uncovered line)
1
/*
2
 * Copyright 2006-2024 The OpenSSL Project Authors. All Rights Reserved.
3
 *
4
 * Licensed under the Apache License 2.0 (the "License").  You may not use
5
 * this file except in compliance with the License.  You can obtain a copy
6
 * in the file LICENSE in the source distribution or at
7
 * https://www.openssl.org/source/license.html
8
 */
9
10
#include <stdio.h>
11
#include "internal/cryptlib.h"
12
#include <openssl/evp.h>
13
#include <openssl/objects.h>
14
#include "crypto/evp.h"
15
#include "internal/provider.h"
16
#include "internal/numbers.h"   /* includes SIZE_MAX */
17
#include "evp_local.h"
18
19
static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
20
0
{
21
0
    ERR_raise(ERR_LIB_EVP, EVP_R_ONLY_ONESHOT_SUPPORTED);
22
0
    return 0;
23
0
}
24
25
/*
26
 * If we get the "NULL" md then the name comes back as "UNDEF". We want to use
27
 * NULL for this.
28
 */
29
static const char *canon_mdname(const char *mdname)
30
2.91k
{
31
2.91k
    if (mdname != NULL && strcmp(mdname, "UNDEF") == 0)
32
0
        return NULL;
33
34
2.91k
    return mdname;
35
2.91k
}
36
37
static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
38
                          const EVP_MD *type, const char *mdname,
39
                          OSSL_LIB_CTX *libctx, const char *props,
40
                          ENGINE *e, EVP_PKEY *pkey, int ver,
41
                          const OSSL_PARAM params[])
42
2.91k
{
43
2.91k
    EVP_PKEY_CTX *locpctx = NULL;
44
2.91k
    EVP_SIGNATURE *signature = NULL;
45
2.91k
    EVP_KEYMGMT *tmp_keymgmt = NULL;
46
2.91k
    const OSSL_PROVIDER *tmp_prov = NULL;
47
2.91k
    const char *supported_sig = NULL;
48
2.91k
    char locmdname[80] = "";     /* 80 chars should be enough */
49
2.91k
    void *provkey = NULL;
50
2.91k
    int ret, iter, reinit = 1;
51
52
2.91k
    if (!evp_md_ctx_free_algctx(ctx))
53
0
        return 0;
54
55
2.91k
    if (ctx->pctx == NULL) {
56
2.91k
        reinit = 0;
57
2.91k
        if (e == NULL)
58
2.91k
            ctx->pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, props);
59
0
        else
60
0
            ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
61
2.91k
    }
62
2.91k
    if (ctx->pctx == NULL)
63
0
        return 0;
64
65
2.91k
    EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_FINALISED);
66
67
2.91k
    locpctx = ctx->pctx;
68
2.91k
    ERR_set_mark();
69
70
2.91k
    if (evp_pkey_ctx_is_legacy(locpctx))
71
0
        goto legacy;
72
73
    /* do not reinitialize if pkey is set or operation is different */
74
2.91k
    if (reinit
75
2.91k
        && (pkey != NULL
76
0
            || locpctx->operation != (ver ? EVP_PKEY_OP_VERIFYCTX
77
0
                                          : EVP_PKEY_OP_SIGNCTX)
78
0
            || (signature = locpctx->op.sig.signature) == NULL
79
0
            || locpctx->op.sig.algctx == NULL))
80
0
        reinit = 0;
81
82
2.91k
    if (props == NULL)
83
2.91k
        props = locpctx->propquery;
84
85
2.91k
    if (locpctx->pkey == NULL) {
86
0
        ERR_clear_last_mark();
87
0
        ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET);
88
0
        goto err;
89
0
    }
90
91
2.91k
    if (!reinit) {
92
2.91k
        evp_pkey_ctx_free_old_ops(locpctx);
93
2.91k
    } else {
94
0
        if (mdname == NULL && type == NULL)
95
0
            mdname = canon_mdname(EVP_MD_get0_name(ctx->reqdigest));
96
0
        goto reinitialize;
97
0
    }
98
99
    /*
100
     * Try to derive the supported signature from |locpctx->keymgmt|.
101
     */
102
2.91k
    if (!ossl_assert(locpctx->pkey->keymgmt == NULL
103
2.91k
                     || locpctx->pkey->keymgmt == locpctx->keymgmt)) {
104
0
        ERR_clear_last_mark();
105
0
        ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
106
0
        goto err;
107
0
    }
108
2.91k
    supported_sig = evp_keymgmt_util_query_operation_name(locpctx->keymgmt,
109
2.91k
                                                          OSSL_OP_SIGNATURE);
110
2.91k
    if (supported_sig == NULL) {
111
0
        ERR_clear_last_mark();
112
0
        ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
113
0
        goto err;
114
0
    }
115
116
    /*
117
     * We perform two iterations:
118
     *
119
     * 1.  Do the normal signature fetch, using the fetching data given by
120
     *     the EVP_PKEY_CTX.
121
     * 2.  Do the provider specific signature fetch, from the same provider
122
     *     as |ctx->keymgmt|
123
     *
124
     * We then try to fetch the keymgmt from the same provider as the
125
     * signature, and try to export |ctx->pkey| to that keymgmt (when
126
     * this keymgmt happens to be the same as |ctx->keymgmt|, the export
127
     * is a no-op, but we call it anyway to not complicate the code even
128
     * more).
129
     * If the export call succeeds (returns a non-NULL provider key pointer),
130
     * we're done and can perform the operation itself.  If not, we perform
131
     * the second iteration, or jump to legacy.
132
     */
133
5.82k
    for (iter = 1, provkey = NULL; iter < 3 && provkey == NULL; iter++) {
134
2.91k
        EVP_KEYMGMT *tmp_keymgmt_tofree = NULL;
135
136
        /*
137
         * If we're on the second iteration, free the results from the first.
138
         * They are NULL on the first iteration, so no need to check what
139
         * iteration we're on.
140
         */
141
2.91k
        EVP_SIGNATURE_free(signature);
142
2.91k
        EVP_KEYMGMT_free(tmp_keymgmt);
143
144
2.91k
        switch (iter) {
145
2.91k
        case 1:
146
2.91k
            signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig,
147
2.91k
                                            locpctx->propquery);
148
2.91k
            if (signature != NULL)
149
2.91k
                tmp_prov = EVP_SIGNATURE_get0_provider(signature);
150
2.91k
            break;
151
0
        case 2:
152
0
            tmp_prov = EVP_KEYMGMT_get0_provider(locpctx->keymgmt);
153
0
            signature =
154
0
                evp_signature_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
155
0
                                              supported_sig, locpctx->propquery);
156
0
            if (signature == NULL)
157
0
                goto legacy;
158
0
            break;
159
2.91k
        }
160
2.91k
        if (signature == NULL)
161
0
            continue;
162
163
        /*
164
         * Ensure that the key is provided, either natively, or as a cached
165
         * export.  We start by fetching the keymgmt with the same name as
166
         * |locpctx->pkey|, but from the provider of the signature method, using
167
         * the same property query as when fetching the signature method.
168
         * With the keymgmt we found (if we did), we try to export |locpctx->pkey|
169
         * to it (evp_pkey_export_to_provider() is smart enough to only actually
170
171
         * export it if |tmp_keymgmt| is different from |locpctx->pkey|'s keymgmt)
172
         */
173
2.91k
        tmp_keymgmt_tofree = tmp_keymgmt =
174
2.91k
            evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
175
2.91k
                                        EVP_KEYMGMT_get0_name(locpctx->keymgmt),
176
2.91k
                                        locpctx->propquery);
177
2.91k
        if (tmp_keymgmt != NULL)
178
2.91k
            provkey = evp_pkey_export_to_provider(locpctx->pkey, locpctx->libctx,
179
2.91k
                                                  &tmp_keymgmt, locpctx->propquery);
180
2.91k
        if (tmp_keymgmt == NULL)
181
0
            EVP_KEYMGMT_free(tmp_keymgmt_tofree);
182
2.91k
    }
183
184
2.91k
    if (provkey == NULL) {
185
0
        EVP_SIGNATURE_free(signature);
186
0
        ERR_clear_last_mark();
187
0
        ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
188
0
        goto err;
189
0
    }
190
191
2.91k
    ERR_pop_to_mark();
192
193
    /* No more legacy from here down to legacy: */
194
195
2.91k
    locpctx->op.sig.signature = signature;
196
2.91k
    locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
197
2.91k
                             : EVP_PKEY_OP_SIGNCTX;
198
2.91k
    locpctx->op.sig.algctx
199
2.91k
        = signature->newctx(ossl_provider_ctx(signature->prov), props);
200
2.91k
    if (locpctx->op.sig.algctx == NULL) {
201
0
        ERR_raise(ERR_LIB_EVP,  EVP_R_INITIALIZATION_ERROR);
202
0
        goto err;
203
0
    }
204
205
2.91k
 reinitialize:
206
2.91k
    if (pctx != NULL)
207
0
        *pctx = locpctx;
208
209
2.91k
    if (type != NULL) {
210
2.91k
        ctx->reqdigest = type;
211
2.91k
        if (mdname == NULL)
212
2.91k
            mdname = canon_mdname(EVP_MD_get0_name(type));
213
2.91k
    } else {
214
0
        if (mdname == NULL && !reinit) {
215
0
            if (evp_keymgmt_util_get_deflt_digest_name(tmp_keymgmt, provkey,
216
0
                                                       locmdname,
217
0
                                                       sizeof(locmdname)) > 0) {
218
0
                mdname = canon_mdname(locmdname);
219
0
            }
220
0
        }
221
222
0
        if (mdname != NULL) {
223
            /*
224
             * We're about to get a new digest so clear anything associated with
225
             * an old digest.
226
             */
227
0
            evp_md_ctx_clear_digest(ctx, 1, 0);
228
229
            /* legacy code support for engines */
230
0
            ERR_set_mark();
231
            /*
232
             * This might be requested by a later call to EVP_MD_CTX_get0_md().
233
             * In that case the "explicit fetch" rules apply for that
234
             * function (as per man pages), i.e. the ref count is not updated
235
             * so the EVP_MD should not be used beyond the lifetime of the
236
             * EVP_MD_CTX.
237
             */
238
0
            ctx->fetched_digest = EVP_MD_fetch(locpctx->libctx, mdname, props);
239
0
            if (ctx->fetched_digest != NULL) {
240
0
                ctx->digest = ctx->reqdigest = ctx->fetched_digest;
241
0
            } else {
242
                /* legacy engine support : remove the mark when this is deleted */
243
0
                ctx->reqdigest = ctx->digest = EVP_get_digestbyname(mdname);
244
0
                if (ctx->digest == NULL) {
245
0
                    (void)ERR_clear_last_mark();
246
0
                    ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
247
0
                    goto err;
248
0
                }
249
0
            }
250
0
            (void)ERR_pop_to_mark();
251
0
        }
252
0
    }
253
254
2.91k
    if (ver) {
255
0
        if (signature->digest_verify_init == NULL) {
256
0
            ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
257
0
            goto err;
258
0
        }
259
0
        ret = signature->digest_verify_init(locpctx->op.sig.algctx,
260
0
                                            mdname, provkey, params);
261
2.91k
    } else {
262
2.91k
        if (signature->digest_sign_init == NULL) {
263
0
            ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
264
0
            goto err;
265
0
        }
266
2.91k
        ret = signature->digest_sign_init(locpctx->op.sig.algctx,
267
2.91k
                                          mdname, provkey, params);
268
2.91k
    }
269
270
    /*
271
     * If the operation was not a success and no digest was found, an error
272
     * needs to be raised.
273
     */
274
2.91k
    if (ret > 0 || mdname != NULL)
275
2.91k
        goto end;
276
0
    if (type == NULL)   /* This check is redundant but clarifies matters */
277
0
        ERR_raise(ERR_LIB_EVP, EVP_R_NO_DEFAULT_DIGEST);
278
279
0
 err:
280
0
    evp_pkey_ctx_free_old_ops(locpctx);
281
0
    locpctx->operation = EVP_PKEY_OP_UNDEFINED;
282
0
    EVP_KEYMGMT_free(tmp_keymgmt);
283
0
    return 0;
284
285
0
 legacy:
286
    /*
287
     * If we don't have the full support we need with provided methods,
288
     * let's go see if legacy does.
289
     */
290
0
    ERR_pop_to_mark();
291
0
    EVP_KEYMGMT_free(tmp_keymgmt);
292
0
    tmp_keymgmt = NULL;
293
294
0
    if (type == NULL && mdname != NULL)
295
0
        type = evp_get_digestbyname_ex(locpctx->libctx, mdname);
296
297
0
    if (ctx->pctx->pmeth == NULL) {
298
0
        ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
299
0
        return 0;
300
0
    }
301
302
0
    if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
303
304
0
        if (type == NULL) {
305
0
            int def_nid;
306
0
            if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
307
0
                type = EVP_get_digestbynid(def_nid);
308
0
        }
309
310
0
        if (type == NULL) {
311
0
            ERR_raise(ERR_LIB_EVP, EVP_R_NO_DEFAULT_DIGEST);
312
0
            return 0;
313
0
        }
314
0
    }
315
316
0
    if (ver) {
317
0
        if (ctx->pctx->pmeth->verifyctx_init) {
318
0
            if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
319
0
                return 0;
320
0
            ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
321
0
        } else if (ctx->pctx->pmeth->digestverify != 0) {
322
0
            ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
323
0
            ctx->update = update;
324
0
        } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
325
0
            return 0;
326
0
        }
327
0
    } else {
328
0
        if (ctx->pctx->pmeth->signctx_init) {
329
0
            if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
330
0
                return 0;
331
0
            ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
332
0
        } else if (ctx->pctx->pmeth->digestsign != 0) {
333
0
            ctx->pctx->operation = EVP_PKEY_OP_SIGN;
334
0
            ctx->update = update;
335
0
        } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
336
0
            return 0;
337
0
        }
338
0
    }
339
0
    if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
340
0
        return 0;
341
0
    if (pctx)
342
0
        *pctx = ctx->pctx;
343
0
    if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
344
0
        return 1;
345
0
    if (!EVP_DigestInit_ex(ctx, type, e))
346
0
        return 0;
347
    /*
348
     * This indicates the current algorithm requires
349
     * special treatment before hashing the tbs-message.
350
     */
351
0
    ctx->pctx->flag_call_digest_custom = 0;
352
0
    if (ctx->pctx->pmeth->digest_custom != NULL)
353
0
        ctx->pctx->flag_call_digest_custom = 1;
354
355
0
    ret = 1;
356
2.91k
 end:
357
2.91k
    if (ret > 0)
358
2.23k
        ret = evp_pkey_ctx_use_cached_data(locpctx);
359
360
2.91k
    EVP_KEYMGMT_free(tmp_keymgmt);
361
2.91k
    return ret > 0 ? 1 : 0;
362
0
}
363
364
int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
365
                          const char *mdname, OSSL_LIB_CTX *libctx,
366
                          const char *props, EVP_PKEY *pkey,
367
                          const OSSL_PARAM params[])
368
0
{
369
0
    return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 0,
370
0
                          params);
371
0
}
372
373
int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
374
                       const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
375
2.91k
{
376
2.91k
    return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 0,
377
2.91k
                          NULL);
378
2.91k
}
379
380
int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
381
                            const char *mdname, OSSL_LIB_CTX *libctx,
382
                            const char *props, EVP_PKEY *pkey,
383
                            const OSSL_PARAM params[])
384
0
{
385
0
    return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 1,
386
0
                          params);
387
0
}
388
389
int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
390
                         const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
391
0
{
392
0
    return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 1,
393
0
                          NULL);
394
0
}
395
396
int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
397
31.6k
{
398
31.6k
    EVP_PKEY_CTX *pctx = ctx->pctx;
399
400
31.6k
    if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
401
0
        ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
402
0
        return 0;
403
0
    }
404
405
31.6k
    if (pctx == NULL
406
31.6k
            || pctx->operation != EVP_PKEY_OP_SIGNCTX
407
31.6k
            || pctx->op.sig.algctx == NULL
408
31.6k
            || pctx->op.sig.signature == NULL)
409
0
        goto legacy;
410
411
31.6k
    if (pctx->op.sig.signature->digest_sign_update == NULL) {
412
0
        ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
413
0
        return 0;
414
0
    }
415
416
31.6k
    return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.algctx,
417
31.6k
                                                      data, dsize);
418
419
0
 legacy:
420
0
    if (pctx != NULL) {
421
        /* do_sigver_init() checked that |digest_custom| is non-NULL */
422
0
        if (pctx->flag_call_digest_custom
423
0
            && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
424
0
            return 0;
425
0
        pctx->flag_call_digest_custom = 0;
426
0
    }
427
428
0
    return EVP_DigestUpdate(ctx, data, dsize);
429
0
}
430
431
int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
432
0
{
433
0
    EVP_PKEY_CTX *pctx = ctx->pctx;
434
435
0
    if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
436
0
        ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
437
0
        return 0;
438
0
    }
439
440
0
    if (pctx == NULL
441
0
            || pctx->operation != EVP_PKEY_OP_VERIFYCTX
442
0
            || pctx->op.sig.algctx == NULL
443
0
            || pctx->op.sig.signature == NULL)
444
0
        goto legacy;
445
446
0
    if (pctx->op.sig.signature->digest_verify_update == NULL) {
447
0
        ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
448
0
        return 0;
449
0
    }
450
451
0
    return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.algctx,
452
0
                                                        data, dsize);
453
454
0
 legacy:
455
0
    if (pctx != NULL) {
456
        /* do_sigver_init() checked that |digest_custom| is non-NULL */
457
0
        if (pctx->flag_call_digest_custom
458
0
            && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
459
0
            return 0;
460
0
        pctx->flag_call_digest_custom = 0;
461
0
    }
462
463
0
    return EVP_DigestUpdate(ctx, data, dsize);
464
0
}
465
466
int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
467
                        size_t *siglen)
468
2.23k
{
469
2.23k
    int sctx = 0;
470
2.23k
    int r = 0;
471
2.23k
    EVP_PKEY_CTX *dctx = NULL, *pctx = ctx->pctx;
472
473
2.23k
    if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
474
0
        ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
475
0
        return 0;
476
0
    }
477
478
2.23k
    if (pctx == NULL
479
2.23k
            || pctx->operation != EVP_PKEY_OP_SIGNCTX
480
2.23k
            || pctx->op.sig.algctx == NULL
481
2.23k
            || pctx->op.sig.signature == NULL)
482
0
        goto legacy;
483
484
2.23k
    if (sigret != NULL && (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) == 0) {
485
        /* try dup */
486
2.23k
        dctx = EVP_PKEY_CTX_dup(pctx);
487
2.23k
        if (dctx != NULL)
488
2.23k
            pctx = dctx;
489
2.23k
    }
490
2.23k
    r = pctx->op.sig.signature->digest_sign_final(pctx->op.sig.algctx,
491
2.23k
                                                  sigret, siglen,
492
2.23k
                                                  sigret == NULL ? 0 : *siglen);
493
2.23k
    if (dctx == NULL && sigret != NULL)
494
0
        ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
495
2.23k
    else
496
2.23k
        EVP_PKEY_CTX_free(dctx);
497
2.23k
    return r;
498
499
0
 legacy:
500
0
    if (pctx == NULL || pctx->pmeth == NULL) {
501
0
        ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
502
0
        return 0;
503
0
    }
504
505
    /* do_sigver_init() checked that |digest_custom| is non-NULL */
506
0
    if (pctx->flag_call_digest_custom
507
0
        && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
508
0
        return 0;
509
0
    pctx->flag_call_digest_custom = 0;
510
511
0
    if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
512
0
        if (sigret == NULL)
513
0
            return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
514
0
        if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISE) != 0) {
515
0
            r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
516
0
            ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
517
0
        } else {
518
0
            dctx = EVP_PKEY_CTX_dup(pctx);
519
0
            if (dctx == NULL)
520
0
                return 0;
521
0
            r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
522
0
            EVP_PKEY_CTX_free(dctx);
523
0
        }
524
0
        return r;
525
0
    }
526
0
    if (pctx->pmeth->signctx != NULL)
527
0
        sctx = 1;
528
0
    else
529
0
        sctx = 0;
530
0
    if (sigret != NULL) {
531
0
        unsigned char md[EVP_MAX_MD_SIZE];
532
0
        unsigned int mdlen = 0;
533
534
0
        if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
535
0
            if (sctx)
536
0
                r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
537
0
            else
538
0
                r = EVP_DigestFinal_ex(ctx, md, &mdlen);
539
0
        } else {
540
0
            EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
541
542
0
            if (tmp_ctx == NULL)
543
0
                return 0;
544
0
            if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
545
0
                EVP_MD_CTX_free(tmp_ctx);
546
0
                return 0;
547
0
            }
548
0
            if (sctx)
549
0
                r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
550
0
                                                  sigret, siglen, tmp_ctx);
551
0
            else
552
0
                r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
553
0
            EVP_MD_CTX_free(tmp_ctx);
554
0
        }
555
0
        if (sctx || !r)
556
0
            return r;
557
0
        if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0)
558
0
            return 0;
559
0
    } else {
560
0
        if (sctx) {
561
0
            if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
562
0
                return 0;
563
0
        } else {
564
0
            int s = EVP_MD_get_size(ctx->digest);
565
566
0
            if (s <= 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
567
0
                return 0;
568
0
        }
569
0
    }
570
0
    return 1;
571
0
}
572
573
int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
574
                   const unsigned char *tbs, size_t tbslen)
575
0
{
576
0
    EVP_PKEY_CTX *pctx = ctx->pctx;
577
578
0
    if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
579
0
        ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
580
0
        return 0;
581
0
    }
582
583
0
    if (pctx != NULL
584
0
            && pctx->operation == EVP_PKEY_OP_SIGNCTX
585
0
            && pctx->op.sig.algctx != NULL
586
0
            && pctx->op.sig.signature != NULL) {
587
0
        if (pctx->op.sig.signature->digest_sign != NULL) {
588
0
            if (sigret != NULL)
589
0
                ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
590
0
            return pctx->op.sig.signature->digest_sign(pctx->op.sig.algctx,
591
0
                                                       sigret, siglen,
592
0
                                                       sigret == NULL ? 0 : *siglen,
593
0
                                                       tbs, tbslen);
594
0
        }
595
0
    } else {
596
        /* legacy */
597
0
        if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
598
0
            return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
599
0
    }
600
601
0
    if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
602
0
        return 0;
603
0
    return EVP_DigestSignFinal(ctx, sigret, siglen);
604
0
}
605
606
int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
607
                          size_t siglen)
608
0
{
609
0
    int vctx = 0;
610
0
    unsigned int mdlen = 0;
611
0
    unsigned char md[EVP_MAX_MD_SIZE];
612
0
    int r = 0;
613
0
    EVP_PKEY_CTX *dctx = NULL, *pctx = ctx->pctx;
614
615
0
    if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
616
0
        ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
617
0
        return 0;
618
0
    }
619
620
0
    if (pctx == NULL
621
0
            || pctx->operation != EVP_PKEY_OP_VERIFYCTX
622
0
            || pctx->op.sig.algctx == NULL
623
0
            || pctx->op.sig.signature == NULL)
624
0
        goto legacy;
625
626
0
    if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISE) == 0) {
627
        /* try dup */
628
0
        dctx = EVP_PKEY_CTX_dup(pctx);
629
0
        if (dctx != NULL)
630
0
            pctx = dctx;
631
0
    }
632
0
    r = pctx->op.sig.signature->digest_verify_final(pctx->op.sig.algctx,
633
0
                                                    sig, siglen);
634
0
    if (dctx == NULL)
635
0
        ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
636
0
    else
637
0
        EVP_PKEY_CTX_free(dctx);
638
0
    return r;
639
640
0
 legacy:
641
0
    if (pctx == NULL || pctx->pmeth == NULL) {
642
0
        ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
643
0
        return 0;
644
0
    }
645
646
    /* do_sigver_init() checked that |digest_custom| is non-NULL */
647
0
    if (pctx->flag_call_digest_custom
648
0
        && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
649
0
        return 0;
650
0
    pctx->flag_call_digest_custom = 0;
651
652
0
    if (pctx->pmeth->verifyctx != NULL)
653
0
        vctx = 1;
654
0
    else
655
0
        vctx = 0;
656
0
    if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
657
0
        if (vctx) {
658
0
            r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx);
659
0
            ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
660
0
        } else
661
0
            r = EVP_DigestFinal_ex(ctx, md, &mdlen);
662
0
    } else {
663
0
        EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
664
0
        if (tmp_ctx == NULL)
665
0
            return -1;
666
0
        if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
667
0
            EVP_MD_CTX_free(tmp_ctx);
668
0
            return -1;
669
0
        }
670
0
        if (vctx)
671
0
            r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
672
0
                                                sig, siglen, tmp_ctx);
673
0
        else
674
0
            r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
675
0
        EVP_MD_CTX_free(tmp_ctx);
676
0
    }
677
0
    if (vctx || !r)
678
0
        return r;
679
0
    return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen);
680
0
}
681
682
int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
683
                     size_t siglen, const unsigned char *tbs, size_t tbslen)
684
0
{
685
0
    EVP_PKEY_CTX *pctx = ctx->pctx;
686
687
0
    if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) {
688
0
        ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
689
0
        return 0;
690
0
    }
691
692
0
    if (pctx != NULL
693
0
            && pctx->operation == EVP_PKEY_OP_VERIFYCTX
694
0
            && pctx->op.sig.algctx != NULL
695
0
            && pctx->op.sig.signature != NULL) {
696
0
        if (pctx->op.sig.signature->digest_verify != NULL) {
697
0
            ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
698
0
            return pctx->op.sig.signature->digest_verify(pctx->op.sig.algctx,
699
0
                                                         sigret, siglen,
700
0
                                                         tbs, tbslen);
701
0
        }
702
0
    } else {
703
        /* legacy */
704
0
        if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL)
705
0
            return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
706
0
    }
707
0
    if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
708
0
        return -1;
709
0
    return EVP_DigestVerifyFinal(ctx, sigret, siglen);
710
0
}