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. */
28 #include <openssl/bio.h>
29 #include <openssl/crypto.h>
30 #include <openssl/x509.h>
31 #include <openssl/ssl.h>
32 #include <openssl/err.h>
33 #include <openssl/pem.h>
34 #include <openssl/rand.h>
43 static int verify_callback PARAMS ((int, X509_STORE_CTX *));
48 #if SSLEAY_VERSION_NUMBER >= 0x00905100
49 if (RAND_status () == 0)
58 RAND_file_name(rand_file, 256);
59 if (rand_file != NULL)
61 /* Seed as much as 1024 bytes from RAND_file_name */
62 RAND_load_file(rand_file, 1024);
64 /* Seed in time (mod_ssl does this) */
65 RAND_seed((unsigned char *)&t, sizeof(time_t));
66 /* Seed in pid (mod_ssl does this) */
67 RAND_seed((unsigned char *)&pid, sizeof(pid_t));
68 /* Initialize system's random number generator */
69 RAND_bytes((unsigned char *)&seed, sizeof(long));
71 while (RAND_status () == 0)
73 /* Repeatedly seed the PRNG using the system's random number
74 generator until it has been seeded with enough data. */
76 RAND_seed((unsigned char *)&l, sizeof(long));
78 if (rand_file != NULL)
80 /* Write a rand_file */
81 RAND_write_file(rand_file);
84 #endif /* SSLEAY_VERSION_NUMBER >= 0x00905100 */
89 /* Creates a SSL Context and sets some defaults for it */
91 init_ssl (SSL_CTX **ctx)
93 SSL_METHOD *meth = NULL;
94 int verify = SSL_VERIFY_NONE;
96 SSL_load_error_strings ();
97 SSLeay_add_all_algorithms ();
98 SSLeay_add_ssl_algorithms ();
99 meth = SSLv23_client_method ();
100 *ctx = SSL_CTX_new (meth);
101 SSL_CTX_set_verify (*ctx, verify, verify_callback);
102 if (*ctx == NULL) return SSLERRCTXCREATE;
105 if (SSL_CTX_use_certificate_file (*ctx, opt.sslcertfile,
106 SSL_FILETYPE_PEM) <= 0)
107 return SSLERRCERTFILE;
108 if (opt.sslcertkey == NULL)
109 opt.sslcertkey=opt.sslcertfile;
110 if (SSL_CTX_use_PrivateKey_file (*ctx, opt.sslcertkey,
111 SSL_FILETYPE_PEM) <= 0)
112 return SSLERRCERTKEY;
115 return 0; /* Succeded */
118 /* Sets up a SSL structure and performs the handshake on fd
119 Returns 0 if everything went right
120 Returns 1 if something went wrong ----- TODO: More exit codes
123 connect_ssl (SSL **con, SSL_CTX *ctx, int fd)
125 *con = (SSL *)SSL_new (ctx);
126 SSL_set_fd (*con, fd);
127 SSL_set_connect_state (*con);
129 if ((*con)->state != SSL_ST_OK)
131 /*while((SSLerror=ERR_get_error())!=0)
132 printf("%s\n", ERR_error_string(SSLerror,NULL));*/
138 shutdown_ssl (SSL* con)
146 free_ssl_ctx (SSL_CTX * ctx)
152 verify_callback (int ok, X509_STORE_CTX *ctx)
155 s = X509_NAME_oneline (X509_get_subject_name (ctx->current_cert), buf, 256);
157 switch (ctx->error) {
158 case X509_V_ERR_CERT_NOT_YET_VALID:
159 case X509_V_ERR_CERT_HAS_EXPIRED:
160 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
167 /* pass all ssl errors to DEBUGP
168 returns the number of printed errors */
170 ssl_printerrors (void)
173 unsigned long curerr = 0;
175 memset(errbuff, 0, sizeof(errbuff));
176 for (curerr = ERR_get_error (); curerr; curerr = ERR_get_error ())
178 DEBUGP (("OpenSSL: %s\n", ERR_error_string (curerr, errbuff)));
184 /* SSL version of iread. Only exchanged read for SSL_read
185 Read at most LEN bytes from FD, storing them to BUF. This is
186 virtually the same as read(), but takes care of EINTR braindamage
187 and uses select() to timeout the stale connections (a connection is
188 stale if more than OPT.TIMEOUT time is spent in select() or
191 ssl_iread (SSL *con, char *buf, int len)
195 BIO_get_fd (con->rbio, &fd);
204 res = select_fd (fd, opt.timeout, 0);
206 while (res == -1 && errno == EINTR);
209 /* Set errno to ETIMEDOUT on timeout. */
211 /* #### Potentially evil! */
217 res = SSL_read (con, buf, len);
219 while (res == -1 && errno == EINTR);
224 /* SSL version of iwrite. Only exchanged write for SSL_write
225 Write LEN bytes from BUF to FD. This is similar to iread(), but
226 doesn't bother with select(). Unlike iread(), it makes sure that
227 all of BUF is actually written to FD, so callers needn't bother
228 with checking that the return value equals to LEN. Instead, you
229 should simply check for -1. */
231 ssl_iwrite (SSL *con, char *buf, int len)
235 BIO_get_fd (con->rbio, &fd);
236 /* `write' may write less than LEN bytes, thus the outward loop
237 keeps trying it until all was written, or an error occurred. The
238 inner loop is reserved for the usual EINTR f*kage, and the
239 innermost loop deals with the same during select(). */
249 res = select_fd (fd, opt.timeout, 1);
251 while (res == -1 && errno == EINTR);
254 /* Set errno to ETIMEDOUT on timeout. */
256 /* #### Potentially evil! */
262 res = SSL_write (con, buf, len);
264 while (res == -1 && errno == EINTR);
272 #endif /* HAVE_SSL */