src/keymanagement.c
author Edouard Tisserant
Mon, 01 Feb 2016 12:06:22 +0100
changeset 439 2f03a972d016
parent 422 e508e223d9ca
child 442 e028f6d1d583
permissions -rw-r--r--
Renamed EMPTY macro to EMPTYSTR, conflicting with some apple includes, and then being always 0
vb@130
     1
#include "platform.h"
vb@0
     2
vb@0
     3
#include <string.h>
vb@0
     4
#include <stdio.h>
vb@0
     5
#include <stdlib.h>
vb@0
     6
#include <assert.h>
vb@0
     7
vb@217
     8
#include "pEp_internal.h"
vb@0
     9
#include "keymanagement.h"
vb@0
    10
vb@0
    11
#ifndef MIN
vb@0
    12
#define MIN(A, B) ((B) > (A) ? (A) : (B))
vb@0
    13
#endif
vb@0
    14
Edouard@439
    15
#ifndef EMPTYSTR
Edouard@439
    16
#define EMPTYSTR(STR) ((STR == NULL) || (STR)[0] == 0)
vb@8
    17
#endif
vb@8
    18
vb@214
    19
#define KEY_EXPIRE_DELTA (60 * 60 * 24 * 365)
vb@214
    20
vb@0
    21
DYNAMIC_API PEP_STATUS update_identity(
vb@0
    22
        PEP_SESSION session, pEp_identity * identity
vb@0
    23
    )
vb@0
    24
{
vb@0
    25
    pEp_identity *stored_identity;
vb@0
    26
    PEP_STATUS status;
vb@0
    27
vb@0
    28
    assert(session);
vb@0
    29
    assert(identity);
Edouard@439
    30
    assert(!EMPTYSTR(identity->address));
vb@0
    31
Edouard@439
    32
    if (!(session && identity && !EMPTYSTR(identity->address)))
vb@191
    33
        return PEP_ILLEGAL_VALUE;
vb@191
    34
vb@0
    35
    status = get_identity(session, identity->address, &stored_identity);
vb@0
    36
    assert(status != PEP_OUT_OF_MEMORY);
vb@0
    37
    if (status == PEP_OUT_OF_MEMORY)
vb@0
    38
        return PEP_OUT_OF_MEMORY;
vb@0
    39
vb@14
    40
    if (stored_identity) {
vb@14
    41
        PEP_comm_type _comm_type_key;
vb@14
    42
        status = get_key_rating(session, stored_identity->fpr, &_comm_type_key);
vb@14
    43
        assert(status != PEP_OUT_OF_MEMORY);
vb@14
    44
        if (status == PEP_OUT_OF_MEMORY)
vb@14
    45
            return PEP_OUT_OF_MEMORY;
vb@10
    46
Edouard@439
    47
        if (EMPTYSTR(identity->user_id)) {
vb@22
    48
            free(identity->user_id);
vb@22
    49
            identity->user_id = strdup(stored_identity->user_id);
vb@22
    50
            if (identity->user_id == NULL)
vb@22
    51
                return PEP_OUT_OF_MEMORY;
vb@22
    52
            identity->user_id_size = stored_identity->user_id_size;
vb@22
    53
        }
vb@22
    54
Edouard@439
    55
        if (EMPTYSTR(identity->username)) {
vb@22
    56
            free(identity->username);
vb@22
    57
            identity->username = strdup(stored_identity->username);
vb@22
    58
            if (identity->username == NULL)
vb@22
    59
                return PEP_OUT_OF_MEMORY;
vb@22
    60
            identity->username_size = stored_identity->username_size;
vb@22
    61
        }
vb@22
    62
Edouard@439
    63
        if (EMPTYSTR(identity->fpr)) {
vb@8
    64
            identity->fpr = strdup(stored_identity->fpr);
vb@8
    65
            assert(identity->fpr);
vb@8
    66
            if (identity->fpr == NULL)
vb@8
    67
                return PEP_OUT_OF_MEMORY;
Edouard@406
    68
            identity->fpr_size = stored_identity->fpr_size;
vb@14
    69
            if (_comm_type_key < PEP_ct_unconfirmed_encryption) {
vb@14
    70
                identity->comm_type = _comm_type_key;
vb@14
    71
            }
vb@14
    72
            else {
vb@14
    73
                identity->comm_type = stored_identity->comm_type;
vb@14
    74
            }
vb@8
    75
        }
Edouard@439
    76
        else /* !EMPTYSTR(identity->fpr) */ {
vb@14
    77
            if (_comm_type_key != PEP_ct_unknown) {
vb@14
    78
                if (_comm_type_key < PEP_ct_unconfirmed_encryption) {
vb@14
    79
                    identity->comm_type = _comm_type_key;
vb@14
    80
                }
vb@14
    81
                else if (identity->comm_type == PEP_ct_unknown) {
vb@8
    82
                    if (strcmp(identity->fpr, stored_identity->fpr) == 0) {
vb@8
    83
                        identity->comm_type = stored_identity->comm_type;
vb@8
    84
                    }
vb@8
    85
                    else {
vb@8
    86
                        status = get_trust(session, identity);
vb@8
    87
                        assert(status != PEP_OUT_OF_MEMORY);
vb@8
    88
                        if (status == PEP_OUT_OF_MEMORY)
vb@8
    89
                            return PEP_OUT_OF_MEMORY;
vb@8
    90
                    }
vb@8
    91
                }
vb@8
    92
            }
vb@8
    93
            else
vb@8
    94
                identity->comm_type = PEP_ct_unknown;
vb@8
    95
        }
vb@8
    96
vb@21
    97
        if (identity->lang[0] == 0) {
vb@21
    98
            identity->lang[0] = stored_identity->lang[0];
vb@21
    99
            identity->lang[1] = stored_identity->lang[1];
vb@21
   100
            identity->lang[2] = 0;
vb@21
   101
        }
vb@21
   102
    }
vb@21
   103
    else /* stored_identity == NULL */ {
Edouard@439
   104
        if (!EMPTYSTR(identity->fpr)) {
vb@21
   105
            PEP_comm_type _comm_type_key;
vb@21
   106
vb@21
   107
            status = get_key_rating(session, identity->fpr, &_comm_type_key);
vb@21
   108
            assert(status != PEP_OUT_OF_MEMORY);
vb@21
   109
            if (status == PEP_OUT_OF_MEMORY)
vb@21
   110
                return PEP_OUT_OF_MEMORY;
vb@21
   111
vb@21
   112
            identity->comm_type = _comm_type_key;
vb@21
   113
        }
Edouard@439
   114
        else /* EMPTYSTR(identity->fpr) */ {
vb@21
   115
            PEP_STATUS status;
vb@21
   116
            stringlist_t *keylist;
vb@21
   117
            char *_fpr = NULL;
vb@21
   118
            identity->comm_type = PEP_ct_unknown;
vb@21
   119
vb@21
   120
            status = find_keys(session, identity->address, &keylist);
vb@21
   121
            assert(status != PEP_OUT_OF_MEMORY);
vb@21
   122
            if (status == PEP_OUT_OF_MEMORY)
vb@21
   123
                return PEP_OUT_OF_MEMORY;
vb@21
   124
vb@21
   125
            stringlist_t *_keylist;
vb@21
   126
            for (_keylist = keylist; _keylist && _keylist->value; _keylist = _keylist->next) {
vb@21
   127
                PEP_comm_type _comm_type_key;
vb@21
   128
vb@21
   129
                status = get_key_rating(session, _keylist->value, &_comm_type_key);
vb@21
   130
                assert(status != PEP_OUT_OF_MEMORY);
vb@21
   131
                if (status == PEP_OUT_OF_MEMORY) {
vb@21
   132
                    free_stringlist(keylist);
vb@21
   133
                    return PEP_OUT_OF_MEMORY;
vb@21
   134
                }
vb@21
   135
vb@21
   136
                if (identity->comm_type == PEP_ct_unknown) {
vb@21
   137
                    if (_comm_type_key != PEP_ct_compromized && _comm_type_key != PEP_ct_unknown) {
vb@21
   138
                        identity->comm_type = _comm_type_key;
vb@21
   139
                        _fpr = _keylist->value;
vb@21
   140
                    }
vb@21
   141
                }
vb@21
   142
                else {
vb@21
   143
                    if (_comm_type_key != PEP_ct_compromized && _comm_type_key != PEP_ct_unknown) {
vb@21
   144
                        if (_comm_type_key > identity->comm_type) {
vb@21
   145
                            identity->comm_type = _comm_type_key;
vb@21
   146
                            _fpr = _keylist->value;
vb@21
   147
                        }
vb@21
   148
                    }
vb@21
   149
                }
vb@21
   150
            }
vb@21
   151
vb@21
   152
            if (_fpr) {
vb@21
   153
                free(identity->fpr);
vb@21
   154
vb@21
   155
                identity->fpr = strdup(_fpr);
vb@21
   156
                if (identity->fpr == NULL) {
vb@21
   157
                    free_stringlist(keylist);
vb@21
   158
                    return PEP_OUT_OF_MEMORY;
vb@21
   159
                }
vb@21
   160
                identity->fpr_size = strlen(identity->fpr);
vb@21
   161
            }
vb@21
   162
            free_stringlist(keylist);
vb@21
   163
        }
vb@21
   164
    }
vb@21
   165
vb@21
   166
    status = PEP_STATUS_OK;
vb@21
   167
Edouard@439
   168
    if (identity->comm_type != PEP_ct_unknown && !EMPTYSTR(identity->user_id)) {
Edouard@439
   169
        assert(!EMPTYSTR(identity->username)); // this should not happen
vb@22
   170
Edouard@439
   171
        if (EMPTYSTR(identity->username)) { // mitigate
vb@0
   172
            free(identity->username);
vb@22
   173
            identity->username = strdup("anonymous");
vb@8
   174
            if (identity->username == NULL)
vb@8
   175
                return PEP_OUT_OF_MEMORY;
vb@22
   176
            identity->username_size = 9;
vb@0
   177
        }
vb@8
   178
vb@8
   179
        status = set_identity(session, identity);
vb@8
   180
        assert(status == PEP_STATUS_OK);
vb@8
   181
    }
vb@8
   182
vb@297
   183
    if (identity->comm_type != PEP_ct_compromized &&
vb@297
   184
            identity->comm_type < PEP_ct_strong_but_unconfirmed)
vb@297
   185
        if (session->examine_identity)
vb@297
   186
            session->examine_identity(identity, session->examine_management);
vb@297
   187
vb@8
   188
    return status;
vb@0
   189
}
vb@0
   190
vb@0
   191
DYNAMIC_API PEP_STATUS myself(PEP_SESSION session, pEp_identity * identity)
vb@0
   192
{
vb@0
   193
    PEP_STATUS status;
vb@46
   194
    stringlist_t *keylist = NULL;
vb@0
   195
vb@0
   196
    assert(session);
vb@0
   197
    assert(identity);
vb@0
   198
    assert(identity->address);
vb@0
   199
    assert(identity->username);
vb@0
   200
    assert(identity->user_id);
vb@0
   201
vb@191
   202
    if (!(session && identity && identity->address && identity->username &&
vb@191
   203
                identity->user_id))
vb@191
   204
        return PEP_ILLEGAL_VALUE;
vb@191
   205
vb@0
   206
    identity->comm_type = PEP_ct_pEp;
vb@0
   207
    identity->me = true;
vb@0
   208
vb@215
   209
    DEBUG_LOG("myself", "debug", identity->address);
vb@0
   210
vb@0
   211
    status = find_keys(session, identity->address, &keylist);
vb@0
   212
    assert(status != PEP_OUT_OF_MEMORY);
vb@0
   213
    if (status == PEP_OUT_OF_MEMORY)
vb@0
   214
        return PEP_OUT_OF_MEMORY;
vb@0
   215
vb@0
   216
    if (keylist == NULL || keylist->value == NULL) {
vb@215
   217
        DEBUG_LOG("generating key pair", "debug", identity->address);
vb@0
   218
        status = generate_keypair(session, identity);
vb@0
   219
        assert(status != PEP_OUT_OF_MEMORY);
vb@0
   220
        if (status != PEP_STATUS_OK) {
vb@0
   221
            char buf[11];
vb@0
   222
            snprintf(buf, 11, "%d", status);
vb@215
   223
            DEBUG_LOG("generating key pair failed", "debug", buf);
vb@0
   224
            return status;
vb@0
   225
        }
vb@0
   226
vb@0
   227
        status = find_keys(session, identity->address, &keylist);
vb@0
   228
        assert(status != PEP_OUT_OF_MEMORY);
vb@0
   229
        if (status == PEP_OUT_OF_MEMORY)
vb@0
   230
            return PEP_OUT_OF_MEMORY;
vb@0
   231
vb@372
   232
        assert(keylist && keylist->value);
Edouard@371
   233
        if (keylist == NULL || keylist->value == NULL) {
Edouard@371
   234
            return PEP_UNKNOWN_ERROR;
Edouard@371
   235
        }
vb@0
   236
    }
vb@214
   237
    else {
vb@214
   238
        bool expired;
vb@214
   239
        status = key_expired(session, keylist->value, &expired);
vb@214
   240
        assert(status == PEP_STATUS_OK);
vb@214
   241
vb@214
   242
        if (status == PEP_STATUS_OK && expired) {
vb@214
   243
            timestamp *ts = new_timestamp(time(NULL) + KEY_EXPIRE_DELTA);
vb@214
   244
            renew_key(session, keylist->value, ts);
vb@214
   245
            free_timestamp(ts);
vb@214
   246
        }
vb@214
   247
    }
vb@0
   248
vb@0
   249
    if (identity->fpr)
vb@0
   250
        free(identity->fpr);
vb@0
   251
    identity->fpr = strdup(keylist->value);
vb@0
   252
    assert(identity->fpr);
vb@0
   253
    free_stringlist(keylist);
vb@0
   254
    if (identity->fpr == NULL)
vb@0
   255
        return PEP_OUT_OF_MEMORY;
vb@8
   256
    identity->fpr_size = strlen(identity->fpr);
vb@0
   257
vb@0
   258
    status = set_identity(session, identity);
vb@0
   259
    assert(status == PEP_STATUS_OK);
vb@0
   260
vb@0
   261
    return PEP_STATUS_OK;
vb@0
   262
}
vb@0
   263
vb@296
   264
DYNAMIC_API PEP_STATUS register_examine_function(
vb@292
   265
        PEP_SESSION session, 
vb@292
   266
        examine_identity_t examine_identity,
vb@292
   267
        void *management
vb@292
   268
    )
vb@292
   269
{
vb@292
   270
    assert(session);
vb@292
   271
    if (!session)
vb@292
   272
        return PEP_ILLEGAL_VALUE;
vb@292
   273
vb@292
   274
    session->examine_management = management;
vb@292
   275
    session->examine_identity = examine_identity;
vb@292
   276
vb@292
   277
    return PEP_STATUS_OK;
vb@292
   278
}
vb@292
   279
vb@0
   280
DYNAMIC_API PEP_STATUS do_keymanagement(
vb@0
   281
        retrieve_next_identity_t retrieve_next_identity,
vb@0
   282
        void *management
vb@0
   283
    )
vb@0
   284
{
vb@0
   285
    PEP_SESSION session;
vb@0
   286
    pEp_identity *identity;
vb@0
   287
    PEP_STATUS status = init(&session);
vb@0
   288
vb@0
   289
    assert(status == PEP_STATUS_OK);
vb@0
   290
    if (status != PEP_STATUS_OK)
vb@0
   291
        return status;
vb@0
   292
vb@24
   293
    assert(retrieve_next_identity);
vb@24
   294
    assert(management);
vb@24
   295
vb@0
   296
    log_event(session, "keymanagement thread started", "pEp engine", NULL, NULL);
vb@0
   297
vb@36
   298
    while ((identity = retrieve_next_identity(management))) {
vb@0
   299
        assert(identity->address);
vb@220
   300
        DEBUG_LOG("do_keymanagement", "retrieve_next_identity", identity->address);
vb@0
   301
        if (identity->me) {
vb@0
   302
            status = myself(session, identity);
vb@0
   303
            assert(status != PEP_OUT_OF_MEMORY);
vb@0
   304
        } else {
vb@0
   305
            status = recv_key(session, identity->address);
vb@0
   306
            assert(status != PEP_OUT_OF_MEMORY);
vb@0
   307
        }
vb@0
   308
        free_identity(identity);
vb@0
   309
    }
vb@0
   310
vb@0
   311
    log_event(session, "keymanagement thread shutdown", "pEp engine", NULL, NULL);
vb@0
   312
vb@0
   313
    release(session);
vb@0
   314
    return PEP_STATUS_OK;
vb@0
   315
}
vb@0
   316
vb@357
   317
DYNAMIC_API PEP_STATUS key_compromized(
vb@357
   318
        PEP_SESSION session,
vb@357
   319
        pEp_identity *ident
vb@357
   320
    )
vb@215
   321
{
vb@218
   322
    PEP_STATUS status = PEP_STATUS_OK;
vb@218
   323
vb@215
   324
    assert(session);
vb@357
   325
    assert(ident);
Edouard@439
   326
    assert(!EMPTYSTR(ident->fpr));
vb@215
   327
vb@357
   328
    if (!(session && ident && ident->fpr))
vb@215
   329
        return PEP_ILLEGAL_VALUE;
vb@215
   330
vb@357
   331
    if (ident->me)
vb@357
   332
        revoke_key(session, ident->fpr, NULL);
vb@357
   333
    status = mark_as_compromized(session, ident->fpr);
vb@218
   334
vb@218
   335
    return status;
vb@215
   336
}
vb@215
   337
Edouard@410
   338
DYNAMIC_API PEP_STATUS key_reset_trust(
Edouard@410
   339
        PEP_SESSION session,
Edouard@410
   340
        pEp_identity *ident
Edouard@410
   341
    )
Edouard@410
   342
{
Edouard@410
   343
    PEP_STATUS status = PEP_STATUS_OK;
Edouard@410
   344
Edouard@410
   345
    assert(session);
Edouard@410
   346
    assert(ident);
vb@420
   347
    assert(!ident->me);
Edouard@439
   348
    assert(!EMPTYSTR(ident->fpr));
Edouard@439
   349
    assert(!EMPTYSTR(ident->address));
Edouard@439
   350
    assert(!EMPTYSTR(ident->user_id));
Edouard@410
   351
vb@420
   352
    if (!(session && ident && !ident->me && ident->fpr && ident->address &&
vb@420
   353
            ident->user_id))
Edouard@410
   354
        return PEP_ILLEGAL_VALUE;
Edouard@410
   355
vb@420
   356
    status = update_identity(session, ident);
vb@420
   357
    if (status != PEP_STATUS_OK)
vb@420
   358
        return status;
Edouard@410
   359
vb@421
   360
    if (ident->comm_type == PEP_ct_compromized)
vb@421
   361
        ident->comm_type = PEP_ct_unknown;
vb@421
   362
    else
vb@421
   363
        ident->comm_type &= ~PEP_ct_confirmed;
vb@421
   364
vb@420
   365
    status = set_identity(session, ident);
vb@421
   366
    if (status != PEP_STATUS_OK)
vb@421
   367
        return status;
vb@421
   368
vb@422
   369
    if (ident->comm_type == PEP_ct_unknown)
vb@422
   370
        status = update_identity(session, ident);
Edouard@410
   371
    return status;
Edouard@410
   372
}
Edouard@410
   373
vb@354
   374
DYNAMIC_API PEP_STATUS trust_personal_key(
vb@354
   375
        PEP_SESSION session,
vb@354
   376
        pEp_identity *ident
vb@354
   377
    )
vb@354
   378
{
vb@354
   379
    PEP_STATUS status = PEP_STATUS_OK;
vb@354
   380
vb@354
   381
    assert(session);
vb@354
   382
    assert(ident);
Edouard@439
   383
    assert(!EMPTYSTR(ident->address));
Edouard@439
   384
    assert(!EMPTYSTR(ident->user_id));
Edouard@439
   385
    assert(!EMPTYSTR(ident->fpr));
vb@354
   386
    assert(!ident->me);
vb@354
   387
Edouard@439
   388
    if (!ident || EMPTYSTR(ident->address) || EMPTYSTR(ident->user_id) ||
Edouard@439
   389
            EMPTYSTR(ident->fpr) || ident->me)
vb@354
   390
        return PEP_ILLEGAL_VALUE;
vb@354
   391
vb@354
   392
    status = update_identity(session, ident);
vb@354
   393
    if (status != PEP_STATUS_OK)
vb@354
   394
        return status;
vb@354
   395
vb@356
   396
    if (ident->comm_type > PEP_ct_strong_but_unconfirmed) {
vb@356
   397
        ident->comm_type |= PEP_ct_confirmed;
vb@356
   398
        status = update_identity(session, ident);
vb@356
   399
    }
vb@356
   400
    else {
vb@356
   401
        // MISSING: S/MIME has to be handled depending on trusted CAs
vb@370
   402
        status = PEP_CANNOT_SET_TRUST;
vb@356
   403
    }
vb@354
   404
vb@354
   405
    return status;
vb@354
   406
}
vb@354
   407