2 Copyright (C) 2000 Free Software Foundation, Inc.
3 Contributed by Christian Fraenkel.
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GNU Wget is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Wget; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
36 #include <openssl/bio.h>
37 #include <openssl/crypto.h>
38 #include <openssl/x509.h>
39 #include <openssl/ssl.h>
40 #include <openssl/err.h>
41 #include <openssl/pem.h>
42 #include <openssl/rand.h>
51 static int verify_callback PARAMS ((int, X509_STORE_CTX *));
56 #if SSLEAY_VERSION_NUMBER >= 0x00905100
57 if (RAND_status () == 0)
64 /* gets random data from egd if opt.sslegdsock was set */
65 if (opt.sslegdsock != NULL)
66 RAND_egd(opt.sslegdsock);
67 /* gets the file ~/.rnd or $RANDFILE if set */
68 RAND_file_name(rand_file, 256);
69 if (rand_file != NULL)
71 /* Seed as much as 1024 bytes from RAND_file_name */
72 RAND_load_file(rand_file, 1024);
74 /* Seed in time (mod_ssl does this) */
75 RAND_seed((unsigned char *)&t, sizeof(time_t));
76 /* Initialize system's random number generator */
77 RAND_bytes((unsigned char *)&seed, sizeof(long));
80 while (RAND_status () == 0)
82 /* Repeatedly seed the PRNG using the system's random number
83 generator until it has been seeded with enough data. */
85 RAND_seed((unsigned char *)&l, sizeof(long));
89 if (RAND_status() == 0)
90 /* Here we should probably disable the whole ssl protocol ? HEH */
91 DEBUGP (("SSL random data generator not seeded correctly, %i",RAND_status()));
93 if (rand_file != NULL)
95 /* Write a rand_file */
96 RAND_write_file(rand_file);
99 #endif /* SSLEAY_VERSION_NUMBER >= 0x00905100 */
104 /* Creates a SSL Context and sets some defaults for it */
106 init_ssl (SSL_CTX **ctx)
108 SSL_METHOD *meth = NULL;
109 int verify = SSL_VERIFY_NONE;
111 SSL_load_error_strings ();
112 SSLeay_add_all_algorithms ();
113 SSLeay_add_ssl_algorithms ();
114 meth = SSLv23_client_method ();
115 *ctx = SSL_CTX_new (meth);
116 SSL_CTX_set_verify (*ctx, verify, verify_callback);
117 if (*ctx == NULL) return SSLERRCTXCREATE;
120 if (SSL_CTX_use_certificate_file (*ctx, opt.sslcertfile,
121 SSL_FILETYPE_PEM) <= 0)
122 return SSLERRCERTFILE;
123 if (opt.sslcertkey == NULL)
124 opt.sslcertkey=opt.sslcertfile;
125 if (SSL_CTX_use_PrivateKey_file (*ctx, opt.sslcertkey,
126 SSL_FILETYPE_PEM) <= 0)
127 return SSLERRCERTKEY;
130 return 0; /* Succeded */
133 /* Sets up a SSL structure and performs the handshake on fd
134 Returns 0 if everything went right
135 Returns 1 if something went wrong ----- TODO: More exit codes
138 connect_ssl (SSL **con, SSL_CTX *ctx, int fd)
140 *con = (SSL *)SSL_new (ctx);
141 SSL_set_fd (*con, fd);
142 SSL_set_connect_state (*con);
144 if ((*con)->state != SSL_ST_OK)
146 /*while((SSLerror=ERR_get_error())!=0)
147 printf("%s\n", ERR_error_string(SSLerror,NULL));*/
153 shutdown_ssl (SSL* con)
161 free_ssl_ctx (SSL_CTX * ctx)
167 verify_callback (int ok, X509_STORE_CTX *ctx)
170 s = X509_NAME_oneline (X509_get_subject_name (ctx->current_cert), buf, 256);
172 switch (ctx->error) {
173 case X509_V_ERR_CERT_NOT_YET_VALID:
174 case X509_V_ERR_CERT_HAS_EXPIRED:
175 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
182 /* pass all ssl errors to DEBUGP
183 returns the number of printed errors */
185 ssl_printerrors (void)
188 unsigned long curerr = 0;
190 memset(errbuff, 0, sizeof(errbuff));
191 for (curerr = ERR_get_error (); curerr; curerr = ERR_get_error ())
193 DEBUGP (("OpenSSL: %s\n", ERR_error_string (curerr, errbuff)));
199 /* SSL version of iread. Only exchanged read for SSL_read
200 Read at most LEN bytes from FD, storing them to BUF. This is
201 virtually the same as read(), but takes care of EINTR braindamage
202 and uses select() to timeout the stale connections (a connection is
203 stale if more than OPT.TIMEOUT time is spent in select() or
206 ssl_iread (SSL *con, char *buf, int len)
210 BIO_get_fd (con->rbio, &fd);
219 res = select_fd (fd, opt.timeout, 0);
221 while (res == -1 && errno == EINTR);
224 /* Set errno to ETIMEDOUT on timeout. */
226 /* #### Potentially evil! */
232 res = SSL_read (con, buf, len);
234 while (res == -1 && errno == EINTR);
239 /* SSL version of iwrite. Only exchanged write for SSL_write
240 Write LEN bytes from BUF to FD. This is similar to iread(), but
241 doesn't bother with select(). Unlike iread(), it makes sure that
242 all of BUF is actually written to FD, so callers needn't bother
243 with checking that the return value equals to LEN. Instead, you
244 should simply check for -1. */
246 ssl_iwrite (SSL *con, char *buf, int len)
250 BIO_get_fd (con->rbio, &fd);
251 /* `write' may write less than LEN bytes, thus the outward loop
252 keeps trying it until all was written, or an error occurred. The
253 inner loop is reserved for the usual EINTR f*kage, and the
254 innermost loop deals with the same during select(). */
264 res = select_fd (fd, opt.timeout, 1);
266 while (res == -1 && errno == EINTR);
269 /* Set errno to ETIMEDOUT on timeout. */
271 /* #### Potentially evil! */
277 res = SSL_write (con, buf, len);
279 while (res == -1 && errno == EINTR);
287 #endif /* HAVE_SSL */