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. */
31 #include <openssl/bio.h>
32 #include <openssl/crypto.h>
33 #include <openssl/x509.h>
34 #include <openssl/ssl.h>
35 #include <openssl/err.h>
36 #include <openssl/pem.h>
37 #include <openssl/rand.h>
46 static int verify_callback PARAMS ((int, X509_STORE_CTX *));
51 #if SSLEAY_VERSION_NUMBER >= 0x00905100
52 if (RAND_status () == 0)
59 /* gets random data from egd if opt.sslegdsock was set */
60 if (opt.sslegdsock != NULL)
61 RAND_egd(opt.sslegdsock);
62 /* gets the file ~/.rnd or $RANDFILE if set */
63 RAND_file_name(rand_file, 256);
64 if (rand_file != NULL)
66 /* Seed as much as 1024 bytes from RAND_file_name */
67 RAND_load_file(rand_file, 1024);
69 /* Seed in time (mod_ssl does this) */
70 RAND_seed((unsigned char *)&t, sizeof(time_t));
71 /* Initialize system's random number generator */
72 RAND_bytes((unsigned char *)&seed, sizeof(long));
75 while (RAND_status () == 0)
77 /* Repeatedly seed the PRNG using the system's random number
78 generator until it has been seeded with enough data. */
80 RAND_seed((unsigned char *)&l, sizeof(long));
84 if (RAND_status() == 0)
85 /* Here we should probably disable the whole ssl protocol ? HEH */
86 DEBUGP (("SSL random data generator not seeded correctly, %i",RAND_status()));
88 if (rand_file != NULL)
90 /* Write a rand_file */
91 RAND_write_file(rand_file);
94 #endif /* SSLEAY_VERSION_NUMBER >= 0x00905100 */
99 /* Creates a SSL Context and sets some defaults for it */
101 init_ssl (SSL_CTX **ctx)
103 SSL_METHOD *meth = NULL;
104 int verify = SSL_VERIFY_NONE;
106 SSL_load_error_strings ();
107 SSLeay_add_all_algorithms ();
108 SSLeay_add_ssl_algorithms ();
109 meth = SSLv23_client_method ();
110 *ctx = SSL_CTX_new (meth);
111 SSL_CTX_set_verify (*ctx, verify, verify_callback);
112 if (*ctx == NULL) return SSLERRCTXCREATE;
115 if (SSL_CTX_use_certificate_file (*ctx, opt.sslcertfile,
116 SSL_FILETYPE_PEM) <= 0)
117 return SSLERRCERTFILE;
118 if (opt.sslcertkey == NULL)
119 opt.sslcertkey=opt.sslcertfile;
120 if (SSL_CTX_use_PrivateKey_file (*ctx, opt.sslcertkey,
121 SSL_FILETYPE_PEM) <= 0)
122 return SSLERRCERTKEY;
125 return 0; /* Succeded */
128 /* Sets up a SSL structure and performs the handshake on fd
129 Returns 0 if everything went right
130 Returns 1 if something went wrong ----- TODO: More exit codes
133 connect_ssl (SSL **con, SSL_CTX *ctx, int fd)
135 *con = (SSL *)SSL_new (ctx);
136 SSL_set_fd (*con, fd);
137 SSL_set_connect_state (*con);
139 if ((*con)->state != SSL_ST_OK)
141 /*while((SSLerror=ERR_get_error())!=0)
142 printf("%s\n", ERR_error_string(SSLerror,NULL));*/
148 shutdown_ssl (SSL* con)
156 free_ssl_ctx (SSL_CTX * ctx)
162 verify_callback (int ok, X509_STORE_CTX *ctx)
165 s = X509_NAME_oneline (X509_get_subject_name (ctx->current_cert), buf, 256);
167 switch (ctx->error) {
168 case X509_V_ERR_CERT_NOT_YET_VALID:
169 case X509_V_ERR_CERT_HAS_EXPIRED:
170 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
177 /* pass all ssl errors to DEBUGP
178 returns the number of printed errors */
180 ssl_printerrors (void)
183 unsigned long curerr = 0;
185 memset(errbuff, 0, sizeof(errbuff));
186 for (curerr = ERR_get_error (); curerr; curerr = ERR_get_error ())
188 DEBUGP (("OpenSSL: %s\n", ERR_error_string (curerr, errbuff)));
194 /* SSL version of iread. Only exchanged read for SSL_read
195 Read at most LEN bytes from FD, storing them to BUF. This is
196 virtually the same as read(), but takes care of EINTR braindamage
197 and uses select() to timeout the stale connections (a connection is
198 stale if more than OPT.TIMEOUT time is spent in select() or
201 ssl_iread (SSL *con, char *buf, int len)
205 BIO_get_fd (con->rbio, &fd);
214 res = select_fd (fd, opt.timeout, 0);
216 while (res == -1 && errno == EINTR);
219 /* Set errno to ETIMEDOUT on timeout. */
221 /* #### Potentially evil! */
227 res = SSL_read (con, buf, len);
229 while (res == -1 && errno == EINTR);
234 /* SSL version of iwrite. Only exchanged write for SSL_write
235 Write LEN bytes from BUF to FD. This is similar to iread(), but
236 doesn't bother with select(). Unlike iread(), it makes sure that
237 all of BUF is actually written to FD, so callers needn't bother
238 with checking that the return value equals to LEN. Instead, you
239 should simply check for -1. */
241 ssl_iwrite (SSL *con, char *buf, int len)
245 BIO_get_fd (con->rbio, &fd);
246 /* `write' may write less than LEN bytes, thus the outward loop
247 keeps trying it until all was written, or an error occurred. The
248 inner loop is reserved for the usual EINTR f*kage, and the
249 innermost loop deals with the same during select(). */
259 res = select_fd (fd, opt.timeout, 1);
261 while (res == -1 && errno == EINTR);
264 /* Set errno to ETIMEDOUT on timeout. */
266 /* #### Potentially evil! */
272 res = SSL_write (con, buf, len);
274 while (res == -1 && errno == EINTR);
282 #endif /* HAVE_SSL */