summaryrefslogtreecommitdiff
path: root/src/lib/ecore_con/efl_net_ssl_ctx-gnutls.c
blob: 7a92a821e948315d97e1171aa0481bcf74150654 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
#include <gnutls/gnutls.h>

struct _Efl_Net_Ssl_Ctx {
   gnutls_certificate_credentials_t x509_cred;
   gnutls_priority_t priority;
   Eina_Bool is_dialer;
};

static Eina_Error
_efl_net_ssl_ctx_load_lists(Efl_Net_Ssl_Ctx *ctx, Efl_Net_Ssl_Ctx_Config cfg)
{
   Eina_List *n, *n_next, *pk_node;
   const char *path;
   unsigned certificates_count = eina_list_count(*cfg.certificates);
   unsigned private_keys_count = eina_list_count(*cfg.private_keys);
   unsigned certificate_revocation_lists_count = eina_list_count(*cfg.certificate_revocation_lists);
   unsigned certificate_authorities_count = eina_list_count(*cfg.certificate_authorities);
   int r;

   ctx->is_dialer = cfg.is_dialer;

   if (cfg.load_defaults)
     {
        r = gnutls_certificate_set_x509_system_trust(ctx->x509_cred);
        if (r < 0)
          {
             ERR("ssl_ctx=%p could not load default paths: %s", ctx, gnutls_strerror(r));
             return ENOSYS;
          }
        DBG("ssl_ctx=%p loaded default paths", ctx);
     }
   else
     DBG("ssl_ctx=%p did not load default paths", ctx);

   /* GNUTLS needs certificate-key pairs, so we do:
    *
    *  - if no private keys, use certificate as its own key;
    *
    *  - if a private keys, walk the list alongside certificates, but
    *    do NOT delete elements if list sizes are different. Stop at
    *    last private key, allowing a single private key for multiple
    *    certificates.
    */
   pk_node = *cfg.private_keys;
   EINA_LIST_FOREACH_SAFE(*cfg.certificates, n, n_next, path)
     {
        const char *key = pk_node ? pk_node->data : path;

        r = gnutls_certificate_set_x509_key_file(ctx->x509_cred, path, key, GNUTLS_X509_FMT_PEM);
        if (r < 0)
          {
             ERR("ssl_ctx=%p could not use certificate from '%s' with key '%s': %s",
                 ctx, path, key, gnutls_strerror(r));

             if (pk_node)
               {
                  if (eina_list_count(*cfg.private_keys) == eina_list_count(*cfg.certificates))
                    {
                       pk_node = pk_node->next;
                       eina_stringshare_del(key);
                       *cfg.private_keys = eina_list_remove_list(*cfg.private_keys, pk_node->prev);
                    }
                  else if (pk_node->next) pk_node = pk_node->next;
               }

             eina_stringshare_del(path);
             *cfg.certificates = eina_list_remove_list(*cfg.certificates, n);
             continue;
          }
        else
          {
             if (pk_node->next) pk_node = pk_node->next;
          }

        DBG("ssl_ctx=%p loaded certificate '%s' with key '%s'", ctx, path, key);
     }
   if (certificates_count && !*cfg.certificates)
     {
        ERR("ssl_ctx=%p none of the required certificates were loaded!", ctx);
        return EINVAL;
     }

   if (private_keys_count && !*cfg.private_keys)
     {
        ERR("ssl_ctx=%p none of the required private keys were loaded!", ctx);
        return EINVAL;
     }
   else if (pk_node != eina_list_last(*cfg.private_keys))
     {
        do
          {
             n = pk_node->next;
             path = n->data;
             ERR("ssl_ctx=%p extra private key is unused '%s'", ctx, path);
             eina_stringshare_del(path);
             *cfg.private_keys = eina_list_remove_list(*cfg.private_keys, n);
          }
        while (pk_node->next);
     }

   EINA_LIST_FOREACH_SAFE(*cfg.certificate_revocation_lists, n, n_next, path)
     {
        r = gnutls_certificate_set_x509_crl_file(ctx->x509_cred, path, GNUTLS_X509_FMT_PEM);
        if (r < 0)
          {
             ERR("ssl_ctx=%p could not use certificate revocation lists from %s: %s",
                 ctx, path, gnutls_strerror(r));
             eina_stringshare_del(path);
             *cfg.certificate_revocation_lists = eina_list_remove_list(*cfg.certificate_revocation_lists, n);
             continue;
          }

        DBG("ssl_ctx=%p loaded certificate revocation lists '%s'", ctx, path);
     }
   if (certificate_revocation_lists_count && !*cfg.certificate_revocation_lists)
     {
        ERR("ssl_ctx=%p none of the required certificate revocation lists were loaded!", ctx);
        return EINVAL;
     }

   EINA_LIST_FOREACH_SAFE(*cfg.certificate_authorities, n, n_next, path)
     {
        struct stat st;

        r = 0;
        if (stat(path, &st) != 0)
          {
             ERR("ssl_ctx=%p could not load certificate authorities from '%s': %s", ctx, path, strerror(errno));
             eina_stringshare_del(path);
             *cfg.certificate_authorities = eina_list_remove_list(*cfg.certificate_authorities, n);
             continue;
          }
        else if (S_ISDIR(st.st_mode))
          r = gnutls_certificate_set_x509_trust_dir(ctx->x509_cred, path, GNUTLS_X509_FMT_PEM);
        else
          r = gnutls_certificate_set_x509_trust_file(ctx->x509_cred, path, GNUTLS_X509_FMT_PEM);

        if (r < 0)
          {
             ERR("ssl_ctx=%p could not use certificate authorities from '%s': %s", ctx, path, gnutls_strerror(r));
             eina_stringshare_del(path);
             *cfg.certificate_authorities = eina_list_remove_list(*cfg.certificate_authorities, n);
             continue;
          }

        DBG("ssl_ctx=%p loaded certificate authorities '%s'", ctx, path);
     }
   if (certificate_authorities_count && !*cfg.certificate_authorities)
     {
        ERR("ssl_ctx=%p none of the required certificate authorities were loaded!", ctx);
        return EINVAL;
     }

   return 0;
}

static void *
efl_net_ssl_ctx_connection_new(Efl_Net_Ssl_Ctx *ctx)
{
   gnutls_session_t session;
   int r;

   r = gnutls_init(&session, ctx->is_dialer ? GNUTLS_CLIENT : GNUTLS_SERVER);
   if (r < 0)
     {
        ERR("ssl_ctx=%p could not create %s session: %s",
            ctx, ctx->is_dialer ? "dialer" : "server", gnutls_strerror(r));
        return NULL;
     }

   if (!ctx->priority)
     {
        r = gnutls_set_default_priority(session);
        if (r < 0)
          {
             ERR("ssl_ctx=%p could not set default cipher priority: %s", ctx, gnutls_strerror(r));
             goto error;
          }
     }
   else
     {
        r = gnutls_priority_set(session, ctx->priority);
        if (r < 0)
          {
             ERR("ssl_ctx=%p could not set cipher priority: %s", ctx, gnutls_strerror(r));
             goto error;
          }
     }

   r = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, ctx->x509_cred);
   if (r < 0)
     {
        ERR("ssl_ctx=%p could not set session credentials: %s", ctx, gnutls_strerror(r));
        goto error;
     }

   return session;

 error:
   gnutls_deinit(session);
   return NULL;
}

static Eina_Error
efl_net_ssl_ctx_setup(Efl_Net_Ssl_Ctx *ctx, Efl_Net_Ssl_Ctx_Config cfg)
{
   Eina_Error err;
   const char *priority;
   int r;

   EINA_SAFETY_ON_TRUE_RETURN_VAL(ctx->x509_cred != NULL, EALREADY);

   switch (cfg.cipher)
     {
      case EFL_NET_SSL_CIPHER_AUTO:
         priority = NULL;
         break;
      case EFL_NET_SSL_CIPHER_TLSV1:
         priority = "NORMAL:%VERIFY_ALLOW_X509_V1_CA_CRT:!VERS-SSL3.0!VERS-TLS1.1:!VERS-TLS1.2";
         break;
      case EFL_NET_SSL_CIPHER_TLSV1_1:
         priority = "NORMAL:%VERIFY_ALLOW_X509_V1_CA_CRT:!VERS-SSL3.0:!VERS-TLS1.0:!VERS-TLS1.2";
         break;
      case EFL_NET_SSL_CIPHER_TLSV1_2:
         priority = "NORMAL:%VERIFY_ALLOW_X509_V1_CA_CRT:!VERS-SSL3.0:!VERS-TLS1.0:!VERS-TLS1.1";
         break;
      default:
         ERR("ssl_ctx=%p unsupported cipher %d", ctx, cfg.cipher);
         return EINVAL;
     }

   if (priority)
     {
        const char *err_pos = NULL;
        r = gnutls_priority_init(&ctx->priority, priority, &err_pos);
        if (r < 0)
          {
             size_t off = err_pos - priority;
             if (r == GNUTLS_E_INVALID_REQUEST)
               {
                  ERR("ssl_ctx=%p invalid syntax on GNUTLS priority string offset %zd: '%s'", ctx, off, priority);
                  return EINVAL;
               }
             ERR("ssl_ctx=%p could not set GNUTLS priority offset %zd '%s': %s", ctx, off, priority, gnutls_strerror(r));
             return EINVAL;
          }
     }

   r = gnutls_certificate_allocate_credentials(&ctx->x509_cred);
   if (r < 0)
     {
        ERR("ssl_ctx=%p could not allocate X509 credentials: %s", ctx, gnutls_strerror(r));
        err = ENOSYS;
        goto err_cert_alloc;
     }

   err = _efl_net_ssl_ctx_load_lists(ctx, cfg);
   if (err)
     {
        ERR("ssl_ctx=%p failed to load certificate, private keys, CRL or CA", ctx);
        goto err_load;
     }

   return 0;

 err_load:
   gnutls_certificate_free_credentials(ctx->x509_cred);
   ctx->x509_cred = NULL;
 err_cert_alloc:
   gnutls_priority_deinit(ctx->priority);
   ctx->priority = NULL;
   return err;
}

static void
efl_net_ssl_ctx_teardown(Efl_Net_Ssl_Ctx *ctx)
{
   if (ctx->x509_cred)
     {
        gnutls_certificate_free_credentials(ctx->x509_cred);
        ctx->x509_cred = NULL;
     }

   if (ctx->priority)
     {
        gnutls_priority_deinit(ctx->priority);
        ctx->priority = NULL;
     }
}

static Eina_Error
efl_net_ssl_ctx_verify_mode_set(Efl_Net_Ssl_Ctx *ctx EINA_UNUSED, Efl_Net_Ssl_Verify_Mode verify_mode EINA_UNUSED)
{
   return 0;
}

static Eina_Error
efl_net_ssl_ctx_hostname_verify_set(Efl_Net_Ssl_Ctx *ctx EINA_UNUSED, Eina_Bool hostname_verify EINA_UNUSED)
{
   return 0;
}

static Eina_Error
efl_net_ssl_ctx_hostname_set(Efl_Net_Ssl_Ctx *ctx EINA_UNUSED, const char *hostname EINA_UNUSED)
{
   return 0;
}