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171 lines
3.4 KiB
C
171 lines
3.4 KiB
C
/*
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* uhttpd - Tiny single-threaded httpd - TLS helper
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*
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* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "uhttpd.h"
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#include "uhttpd-tls.h"
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#include "uhttpd-utils.h"
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#include <syslog.h>
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#define dbg(...) syslog(LOG_INFO, __VA_ARGS__)
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SSL_CTX * uh_tls_ctx_init(void)
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{
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SSL_CTX *c;
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SSL_load_error_strings();
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SSL_library_init();
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#if TLS_IS_OPENSSL
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if ((c = SSL_CTX_new(SSLv23_server_method())) != NULL)
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#else
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if ((c = SSL_CTX_new(TLSv1_server_method())) != NULL)
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#endif
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SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL);
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return c;
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}
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int uh_tls_ctx_cert(SSL_CTX *c, const char *file)
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{
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int rv;
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if( (rv = SSL_CTX_use_certificate_file(c, file, SSL_FILETYPE_PEM)) < 1 )
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rv = SSL_CTX_use_certificate_file(c, file, SSL_FILETYPE_ASN1);
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return rv;
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}
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int uh_tls_ctx_key(SSL_CTX *c, const char *file)
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{
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int rv;
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if( (rv = SSL_CTX_use_PrivateKey_file(c, file, SSL_FILETYPE_PEM)) < 1 )
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rv = SSL_CTX_use_PrivateKey_file(c, file, SSL_FILETYPE_ASN1);
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return rv;
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}
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void uh_tls_ctx_free(struct listener *l)
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{
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SSL_CTX_free(l->tls);
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}
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int uh_tls_client_accept(struct client *c)
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{
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int rv, err;
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int fd = c->fd.fd;
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if (!c->server || !c->server->tls)
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{
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c->tls = NULL;
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return 1;
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}
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if ((c->tls = SSL_new(c->server->tls)))
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{
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if ((rv = SSL_set_fd(c->tls, fd)) < 1)
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{
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SSL_free(c->tls);
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c->tls = NULL;
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}
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else
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{
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while (true)
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{
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rv = SSL_accept(c->tls);
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err = SSL_get_error(c->tls, rv);
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if ((rv != 1) &&
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(err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE))
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{
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if (uh_socket_wait(fd, c->server->conf->network_timeout,
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(err == SSL_ERROR_WANT_WRITE)))
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{
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D("TLS: accept(%d) = retry\n", fd);
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continue;
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}
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D("TLS: accept(%d) = timeout\n", fd);
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}
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else if (rv == 1)
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{
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D("TLS: accept(%d) = %p\n", fd, c->tls);
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return 1;
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}
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#ifdef TLS_IS_OPENSSL
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D("TLS: accept(%d) = failed: %s\n",
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fd, ERR_error_string(ERR_get_error(), NULL));
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#endif
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SSL_free(c->tls);
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c->tls = NULL;
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break;
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}
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}
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}
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return 0;
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}
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int uh_tls_client_recv(struct client *c, char *buf, int len)
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{
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int rv = SSL_read(c->tls, buf, len);
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int err = SSL_get_error(c->tls, 0);
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if ((rv == -1) && (err == SSL_ERROR_WANT_READ))
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{
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D("TLS: recv(%d, %d) = retry\n", c->fd.fd, len);
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errno = EAGAIN;
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return -1;
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}
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D("TLS: recv(%d, %d) = %d\n", c->fd.fd, len, rv);
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return rv;
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}
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int uh_tls_client_send(struct client *c, const char *buf, int len)
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{
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int rv = SSL_write(c->tls, buf, len);
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int err = SSL_get_error(c->tls, 0);
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if ((rv == -1) && (err == SSL_ERROR_WANT_WRITE))
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{
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D("TLS: send(%d, %d) = retry\n", c->fd.fd, len);
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errno = EAGAIN;
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return -1;
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}
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D("TLS: send(%d, %d) = %d\n", c->fd.fd, len, rv);
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return rv;
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}
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void uh_tls_client_close(struct client *c)
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{
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if (c->tls)
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{
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D("TLS: close(%d)\n", c->fd.fd);
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SSL_shutdown(c->tls);
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SSL_free(c->tls);
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c->tls = NULL;
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}
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}
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