package/uhttpd/src/uhttpd-tls.c

   1 /*
   2  * uhttpd - Tiny single-threaded httpd - TLS helper
   3  *
   4  *   Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  *  Licensed under the Apache License, Version 2.0 (the "License");
   7  *  you may not use this file except in compliance with the License.
   8  *  You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  *  Unless required by applicable law or agreed to in writing, software
  13  *  distributed under the License is distributed on an "AS IS" BASIS,
  14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  *  See the License for the specific language governing permissions and
  16  *  limitations under the License.
  17  */
  18
  19 #include "uhttpd.h"
  20 #include "uhttpd-tls.h"
  21 #include "uhttpd-utils.h"
  22
  23
  24 SSL_CTX * uh_tls_ctx_init()
  25 {
  26         SSL_CTX *c;
  27
  28         SSL_load_error_strings();
  29         SSL_library_init();
  30
  31         if( (c = SSL_CTX_new(TLSv1_server_method())) != NULL )
  32                 SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL);
  33
  34         return c;
  35 }
  36
  37 int uh_tls_ctx_cert(SSL_CTX *c, const char *file)
  38 {
  39         int rv;
  40
  41         if( (rv = SSL_CTX_use_certificate_file(c, file, SSL_FILETYPE_PEM)) < 1 )
  42                 rv = SSL_CTX_use_certificate_file(c, file, SSL_FILETYPE_ASN1);
  43
  44         return rv;
  45 }
  46
  47 int uh_tls_ctx_key(SSL_CTX *c, const char *file)
  48 {
  49         int rv;
  50
  51         if( (rv = SSL_CTX_use_PrivateKey_file(c, file, SSL_FILETYPE_PEM)) < 1 )
  52                 rv = SSL_CTX_use_PrivateKey_file(c, file, SSL_FILETYPE_ASN1);
  53
  54         return rv;
  55 }
  56
  57 void uh_tls_ctx_free(struct listener *l)
  58 {
  59         SSL_CTX_free(l->tls);
  60 }
  61
  62
  63 int uh_tls_client_accept(struct client *c)
  64 {
  65         int rv;
  66
  67         if( c->server && c->server->tls )
  68         {
  69                 c->tls = SSL_new(c->server->tls);
  70                 if( c->tls )
  71                 {
  72                         if( (rv = SSL_set_fd(c->tls, c->socket)) < 1 )
  73                                 goto cleanup;
  74                         if( (rv = SSL_accept(c->tls)) < 1 )
  75                                 goto cleanup;
  76                 }
  77                 else
  78                         rv = 0;
  79         }
  80         else
  81         {
  82                 c->tls = NULL;
  83                 rv = 1;
  84         }
  85
  86 done:
  87         return rv;
  88
  89 cleanup:
  90         SSL_free(c->tls);
  91         c->tls = NULL;
  92         goto done;
  93 }
  94
  95 int uh_tls_client_recv(struct client *c, void *buf, int len)
  96 {
  97         int rv = SSL_read(c->tls, buf, len);
  98         return (rv > 0) ? rv : -1;
  99 }
 100
 101 int uh_tls_client_send(struct client *c, void *buf, int len)
 102 {
 103         int rv = SSL_write(c->tls, buf, len);
 104         return (rv > 0) ? rv : -1;
 105 }
 106
 107 void uh_tls_client_close(struct client *c)
 108 {
 109         if( c->tls )
 110         {
 111                 SSL_shutdown(c->tls);
 112                 SSL_free(c->tls);
 113
 114                 c->tls = NULL;
 115         }
 116 }