src/keymanagement.c
author Volker Birk <vb@pep-project.org>
Mon, 28 Sep 2015 11:08:26 +0200
changeset 354 3e5db18f227b
parent 297 c0f6d3e45ff0
child 356 8c870c0d0d1d
permissions -rw-r--r--
adding trust_personal_key()
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
vb@8
    15
#ifndef EMPTY
vb@8
    16
#define EMPTY(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);
vb@21
    30
    assert(!EMPTY(identity->address));
vb@0
    31
vb@191
    32
    if (!(session && identity && !EMPTY(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
vb@22
    47
        if (EMPTY(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
vb@22
    55
        if (EMPTY(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
vb@8
    63
        if (EMPTY(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;
vb@8
    68
            identity->fpr_size = stored_identity->address_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
        }
vb@8
    76
        else /* !EMPTY(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 */ {
vb@21
   104
        if (!EMPTY(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
        }
vb@21
   114
        else /* EMPTY(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
vb@21
   168
    if (identity->comm_type != PEP_ct_unknown && !EMPTY(identity->user_id)) {
vb@22
   169
        assert(!EMPTY(identity->username)); // this should not happen
vb@22
   170
vb@22
   171
        if (EMPTY(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@0
   209
    pEp_identity *_identity;
vb@0
   210
vb@215
   211
    DEBUG_LOG("myself", "debug", identity->address);
vb@0
   212
    status = get_identity(session, identity->address, &_identity);
vb@0
   213
    assert(status != PEP_OUT_OF_MEMORY);
vb@0
   214
    if (status == PEP_OUT_OF_MEMORY)
vb@0
   215
        return PEP_OUT_OF_MEMORY;
vb@0
   216
vb@0
   217
    status = find_keys(session, identity->address, &keylist);
vb@0
   218
    assert(status != PEP_OUT_OF_MEMORY);
vb@0
   219
    if (status == PEP_OUT_OF_MEMORY)
vb@0
   220
        return PEP_OUT_OF_MEMORY;
vb@0
   221
vb@0
   222
    if (keylist == NULL || keylist->value == NULL) {
vb@215
   223
        DEBUG_LOG("generating key pair", "debug", identity->address);
vb@0
   224
        status = generate_keypair(session, identity);
vb@0
   225
        assert(status != PEP_OUT_OF_MEMORY);
vb@0
   226
        if (status != PEP_STATUS_OK) {
vb@0
   227
            char buf[11];
vb@0
   228
            snprintf(buf, 11, "%d", status);
vb@215
   229
            DEBUG_LOG("generating key pair failed", "debug", buf);
vb@0
   230
            return status;
vb@0
   231
        }
vb@0
   232
vb@0
   233
        status = find_keys(session, identity->address, &keylist);
vb@0
   234
        assert(status != PEP_OUT_OF_MEMORY);
vb@0
   235
        if (status == PEP_OUT_OF_MEMORY)
vb@0
   236
            return PEP_OUT_OF_MEMORY;
vb@0
   237
vb@0
   238
        assert(keylist);
vb@0
   239
    }
vb@214
   240
    else {
vb@214
   241
        bool expired;
vb@214
   242
        status = key_expired(session, keylist->value, &expired);
vb@214
   243
        assert(status == PEP_STATUS_OK);
vb@214
   244
vb@214
   245
        if (status == PEP_STATUS_OK && expired) {
vb@214
   246
            timestamp *ts = new_timestamp(time(NULL) + KEY_EXPIRE_DELTA);
vb@214
   247
            renew_key(session, keylist->value, ts);
vb@214
   248
            free_timestamp(ts);
vb@214
   249
        }
vb@214
   250
    }
vb@0
   251
vb@0
   252
    if (identity->fpr)
vb@0
   253
        free(identity->fpr);
vb@0
   254
    identity->fpr = strdup(keylist->value);
vb@0
   255
    assert(identity->fpr);
vb@0
   256
    free_stringlist(keylist);
vb@0
   257
    if (identity->fpr == NULL)
vb@0
   258
        return PEP_OUT_OF_MEMORY;
vb@8
   259
    identity->fpr_size = strlen(identity->fpr);
vb@0
   260
vb@0
   261
    status = set_identity(session, identity);
vb@0
   262
    assert(status == PEP_STATUS_OK);
vb@0
   263
vb@0
   264
    return PEP_STATUS_OK;
vb@0
   265
}
vb@0
   266
vb@296
   267
DYNAMIC_API PEP_STATUS register_examine_function(
vb@292
   268
        PEP_SESSION session, 
vb@292
   269
        examine_identity_t examine_identity,
vb@292
   270
        void *management
vb@292
   271
    )
vb@292
   272
{
vb@292
   273
    assert(session);
vb@292
   274
    if (!session)
vb@292
   275
        return PEP_ILLEGAL_VALUE;
vb@292
   276
vb@292
   277
    session->examine_management = management;
vb@292
   278
    session->examine_identity = examine_identity;
vb@292
   279
vb@292
   280
    return PEP_STATUS_OK;
vb@292
   281
}
vb@292
   282
vb@0
   283
DYNAMIC_API PEP_STATUS do_keymanagement(
vb@0
   284
        retrieve_next_identity_t retrieve_next_identity,
vb@0
   285
        void *management
vb@0
   286
    )
vb@0
   287
{
vb@0
   288
    PEP_SESSION session;
vb@0
   289
    pEp_identity *identity;
vb@0
   290
    PEP_STATUS status = init(&session);
vb@0
   291
vb@0
   292
    assert(status == PEP_STATUS_OK);
vb@0
   293
    if (status != PEP_STATUS_OK)
vb@0
   294
        return status;
vb@0
   295
vb@24
   296
    assert(retrieve_next_identity);
vb@24
   297
    assert(management);
vb@24
   298
vb@0
   299
    log_event(session, "keymanagement thread started", "pEp engine", NULL, NULL);
vb@0
   300
vb@36
   301
    while ((identity = retrieve_next_identity(management))) {
vb@0
   302
        assert(identity->address);
vb@220
   303
        DEBUG_LOG("do_keymanagement", "retrieve_next_identity", identity->address);
vb@0
   304
        if (identity->me) {
vb@0
   305
            status = myself(session, identity);
vb@0
   306
            assert(status != PEP_OUT_OF_MEMORY);
vb@0
   307
        } else {
vb@0
   308
            status = recv_key(session, identity->address);
vb@0
   309
            assert(status != PEP_OUT_OF_MEMORY);
vb@0
   310
        }
vb@0
   311
        free_identity(identity);
vb@0
   312
    }
vb@0
   313
vb@0
   314
    log_event(session, "keymanagement thread shutdown", "pEp engine", NULL, NULL);
vb@0
   315
vb@0
   316
    release(session);
vb@0
   317
    return PEP_STATUS_OK;
vb@0
   318
}
vb@0
   319
vb@215
   320
DYNAMIC_API PEP_STATUS key_compromized(PEP_SESSION session, const char *fpr)
vb@215
   321
{
vb@218
   322
    PEP_STATUS status = PEP_STATUS_OK;
vb@218
   323
vb@215
   324
    assert(session);
vb@215
   325
    assert(fpr);
vb@215
   326
vb@215
   327
    if (!(session && fpr))
vb@215
   328
        return PEP_ILLEGAL_VALUE;
vb@215
   329
vb@218
   330
    status = revoke_key(session, fpr, NULL);
vb@218
   331
vb@218
   332
    return status;
vb@215
   333
}
vb@215
   334
vb@354
   335
DYNAMIC_API PEP_STATUS trust_personal_key(
vb@354
   336
        PEP_SESSION session,
vb@354
   337
        pEp_identity *ident
vb@354
   338
    )
vb@354
   339
{
vb@354
   340
    PEP_STATUS status = PEP_STATUS_OK;
vb@354
   341
vb@354
   342
    assert(session);
vb@354
   343
    assert(ident);
vb@354
   344
    assert(!EMPTY(ident->address));
vb@354
   345
    assert(!EMPTY(ident->user_id));
vb@354
   346
    assert(!EMPTY(ident->fpr));
vb@354
   347
    assert(!ident->me);
vb@354
   348
vb@354
   349
    if (!ident || EMPTY(ident->address) || EMPTY(ident->user_id) ||
vb@354
   350
            EMPTY(ident->fpr) || ident->me)
vb@354
   351
        return PEP_ILLEGAL_VALUE;
vb@354
   352
vb@354
   353
    status = update_identity(session, ident);
vb@354
   354
    if (status != PEP_STATUS_OK)
vb@354
   355
        return status;
vb@354
   356
vb@354
   357
    ident->comm_type |= PEP_ct_confirmed;
vb@354
   358
vb@354
   359
    status = update_identity(session, ident);
vb@354
   360
    return status;
vb@354
   361
}
vb@354
   362