2 Copyright (C) 2000 Christian Fraenkel.
4 This file is part of Wget.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
27 #include <openssl/bio.h>
28 #include <openssl/crypto.h>
29 #include <openssl/x509.h>
30 #include <openssl/ssl.h>
31 #include <openssl/err.h>
32 #include <openssl/pem.h>
41 static int verify_callback PARAMS ((int, X509_STORE_CTX *));
43 /* Creates a SSL Context and sets some defaults for it */
45 init_ssl (SSL_CTX **ctx)
47 SSL_METHOD *meth = NULL;
48 int verify = SSL_VERIFY_NONE;
50 SSL_load_error_strings ();
51 SSLeay_add_all_algorithms ();
52 SSLeay_add_ssl_algorithms ();
53 meth = SSLv23_client_method ();
54 *ctx = SSL_CTX_new (meth);
55 SSL_CTX_set_verify (*ctx, verify, verify_callback);
56 if (*ctx == NULL) return SSLERRCTXCREATE;
59 if (SSL_CTX_use_certificate_file (*ctx, opt.sslcertfile,
60 SSL_FILETYPE_PEM) <= 0)
61 return SSLERRCERTFILE;
62 if (opt.sslcertkey == NULL)
63 opt.sslcertkey=opt.sslcertfile;
64 if (SSL_CTX_use_PrivateKey_file (*ctx, opt.sslcertkey,
65 SSL_FILETYPE_PEM) <= 0)
68 return 0; /* Succeded */
71 /* Sets up a SSL structure and performs the handshake on fd
72 Returns 0 if everything went right
73 Returns 1 if something went wrong ----- TODO: More exit codes
76 connect_ssl (SSL **con, SSL_CTX *ctx, int fd)
78 *con = (SSL *)SSL_new (ctx);
79 SSL_set_fd (*con, fd);
80 SSL_set_connect_state (*con);
82 if ((*con)->state != SSL_ST_OK)
88 shutdown_ssl (SSL* con)
96 free_ssl_ctx (SSL_CTX * ctx)
102 verify_callback (int ok, X509_STORE_CTX *ctx)
105 s = X509_NAME_oneline (X509_get_subject_name (ctx->current_cert), buf, 256);
107 switch (ctx->error) {
108 case X509_V_ERR_CERT_NOT_YET_VALID:
109 case X509_V_ERR_CERT_HAS_EXPIRED:
110 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
117 /* pass all ssl errors to DEBUGP
118 returns the number of printed errors */
120 ssl_printerrors (void)
123 unsigned long curerr = 0;
125 memset(errbuff, 0, sizeof(errbuff));
126 for (curerr = ERR_get_error (); curerr; curerr = ERR_get_error ())
128 DEBUGP (("OpenSSL: %s\n", ERR_error_string (curerr, errbuff)));
134 /* SSL version of iread. Only exchanged read for SSL_read
135 Read at most LEN bytes from FD, storing them to BUF. This is
136 virtually the same as read(), but takes care of EINTR braindamage
137 and uses select() to timeout the stale connections (a connection is
138 stale if more than OPT.TIMEOUT time is spent in select() or
141 ssl_iread (SSL *con, char *buf, int len)
145 BIO_get_fd (con->rbio, &fd);
154 res = select_fd (fd, opt.timeout, 0);
156 while (res == -1 && errno == EINTR);
159 /* Set errno to ETIMEDOUT on timeout. */
161 /* #### Potentially evil! */
167 res = SSL_read (con, buf, len);
169 while (res == -1 && errno == EINTR);
174 /* SSL version of iwrite. Only exchanged write for SSL_write
175 Write LEN bytes from BUF to FD. This is similar to iread(), but
176 doesn't bother with select(). Unlike iread(), it makes sure that
177 all of BUF is actually written to FD, so callers needn't bother
178 with checking that the return value equals to LEN. Instead, you
179 should simply check for -1. */
181 ssl_iwrite (SSL *con, char *buf, int len)
185 BIO_get_fd (con->rbio, &fd);
186 /* `write' may write less than LEN bytes, thus the outward loop
187 keeps trying it until all was written, or an error occurred. The
188 inner loop is reserved for the usual EINTR f*kage, and the
189 innermost loop deals with the same during select(). */
199 res = select_fd (fd, opt.timeout, 1);
201 while (res == -1 && errno == EINTR);
204 /* Set errno to ETIMEDOUT on timeout. */
206 /* #### Potentially evil! */
212 res = SSL_write (con, buf, len);
214 while (res == -1 && errno == EINTR);
222 #endif /* HAVE_SSL */