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- /* ssl/bio_ssl.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <errno.h>
- #include <openssl/crypto.h>
- #include <openssl/bio.h>
- #include <openssl/err.h>
- #include <openssl/ssl.h>
- static int ssl_write(BIO *h, const char *buf, int num);
- static int ssl_read(BIO *h, char *buf, int size);
- static int ssl_puts(BIO *h, const char *str);
- static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);
- static int ssl_new(BIO *h);
- static int ssl_free(BIO *data);
- static long ssl_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
- typedef struct bio_ssl_st {
- SSL *ssl; /* The ssl handle :-) */
- /* re-negotiate every time the total number of bytes is this size */
- int num_renegotiates;
- unsigned long renegotiate_count;
- unsigned long byte_count;
- unsigned long renegotiate_timeout;
- unsigned long last_time;
- } BIO_SSL;
- static BIO_METHOD methods_sslp = {
- BIO_TYPE_SSL, "ssl",
- ssl_write,
- ssl_read,
- ssl_puts,
- NULL, /* ssl_gets, */
- ssl_ctrl,
- ssl_new,
- ssl_free,
- ssl_callback_ctrl,
- };
- BIO_METHOD *BIO_f_ssl(void)
- {
- return (&methods_sslp);
- }
- static int ssl_new(BIO *bi)
- {
- BIO_SSL *bs;
- bs = (BIO_SSL *)OPENSSL_malloc(sizeof(BIO_SSL));
- if (bs == NULL) {
- BIOerr(BIO_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
- return (0);
- }
- memset(bs, 0, sizeof(BIO_SSL));
- bi->init = 0;
- bi->ptr = (char *)bs;
- bi->flags = 0;
- return (1);
- }
- static int ssl_free(BIO *a)
- {
- BIO_SSL *bs;
- if (a == NULL)
- return (0);
- bs = (BIO_SSL *)a->ptr;
- if (bs->ssl != NULL)
- SSL_shutdown(bs->ssl);
- if (a->shutdown) {
- if (a->init && (bs->ssl != NULL))
- SSL_free(bs->ssl);
- a->init = 0;
- a->flags = 0;
- }
- if (a->ptr != NULL)
- OPENSSL_free(a->ptr);
- return (1);
- }
- static int ssl_read(BIO *b, char *out, int outl)
- {
- int ret = 1;
- BIO_SSL *sb;
- SSL *ssl;
- int retry_reason = 0;
- int r = 0;
- if (out == NULL)
- return (0);
- sb = (BIO_SSL *)b->ptr;
- ssl = sb->ssl;
- BIO_clear_retry_flags(b);
- #if 0
- if (!SSL_is_init_finished(ssl)) {
- /* ret=SSL_do_handshake(ssl); */
- if (ret > 0) {
- outflags = (BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
- ret = -1;
- goto end;
- }
- }
- #endif
- /* if (ret > 0) */
- ret = SSL_read(ssl, out, outl);
- switch (SSL_get_error(ssl, ret)) {
- case SSL_ERROR_NONE:
- if (ret <= 0)
- break;
- if (sb->renegotiate_count > 0) {
- sb->byte_count += ret;
- if (sb->byte_count > sb->renegotiate_count) {
- sb->byte_count = 0;
- sb->num_renegotiates++;
- SSL_renegotiate(ssl);
- r = 1;
- }
- }
- if ((sb->renegotiate_timeout > 0) && (!r)) {
- unsigned long tm;
- tm = (unsigned long)time(NULL);
- if (tm > sb->last_time + sb->renegotiate_timeout) {
- sb->last_time = tm;
- sb->num_renegotiates++;
- SSL_renegotiate(ssl);
- }
- }
- break;
- case SSL_ERROR_WANT_READ:
- BIO_set_retry_read(b);
- break;
- case SSL_ERROR_WANT_WRITE:
- BIO_set_retry_write(b);
- break;
- case SSL_ERROR_WANT_X509_LOOKUP:
- BIO_set_retry_special(b);
- retry_reason = BIO_RR_SSL_X509_LOOKUP;
- break;
- case SSL_ERROR_WANT_ACCEPT:
- BIO_set_retry_special(b);
- retry_reason = BIO_RR_ACCEPT;
- break;
- case SSL_ERROR_WANT_CONNECT:
- BIO_set_retry_special(b);
- retry_reason = BIO_RR_CONNECT;
- break;
- case SSL_ERROR_SYSCALL:
- case SSL_ERROR_SSL:
- case SSL_ERROR_ZERO_RETURN:
- default:
- break;
- }
- b->retry_reason = retry_reason;
- return (ret);
- }
- static int ssl_write(BIO *b, const char *out, int outl)
- {
- int ret, r = 0;
- int retry_reason = 0;
- SSL *ssl;
- BIO_SSL *bs;
- if (out == NULL)
- return (0);
- bs = (BIO_SSL *)b->ptr;
- ssl = bs->ssl;
- BIO_clear_retry_flags(b);
- /*
- * ret=SSL_do_handshake(ssl); if (ret > 0)
- */
- ret = SSL_write(ssl, out, outl);
- switch (SSL_get_error(ssl, ret)) {
- case SSL_ERROR_NONE:
- if (ret <= 0)
- break;
- if (bs->renegotiate_count > 0) {
- bs->byte_count += ret;
- if (bs->byte_count > bs->renegotiate_count) {
- bs->byte_count = 0;
- bs->num_renegotiates++;
- SSL_renegotiate(ssl);
- r = 1;
- }
- }
- if ((bs->renegotiate_timeout > 0) && (!r)) {
- unsigned long tm;
- tm = (unsigned long)time(NULL);
- if (tm > bs->last_time + bs->renegotiate_timeout) {
- bs->last_time = tm;
- bs->num_renegotiates++;
- SSL_renegotiate(ssl);
- }
- }
- break;
- case SSL_ERROR_WANT_WRITE:
- BIO_set_retry_write(b);
- break;
- case SSL_ERROR_WANT_READ:
- BIO_set_retry_read(b);
- break;
- case SSL_ERROR_WANT_X509_LOOKUP:
- BIO_set_retry_special(b);
- retry_reason = BIO_RR_SSL_X509_LOOKUP;
- break;
- case SSL_ERROR_WANT_CONNECT:
- BIO_set_retry_special(b);
- retry_reason = BIO_RR_CONNECT;
- case SSL_ERROR_SYSCALL:
- case SSL_ERROR_SSL:
- default:
- break;
- }
- b->retry_reason = retry_reason;
- return (ret);
- }
- static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)
- {
- SSL **sslp, *ssl;
- BIO_SSL *bs;
- BIO *dbio, *bio;
- long ret = 1;
- bs = (BIO_SSL *)b->ptr;
- ssl = bs->ssl;
- if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
- return (0);
- switch (cmd) {
- case BIO_CTRL_RESET:
- SSL_shutdown(ssl);
- if (ssl->handshake_func == ssl->method->ssl_connect)
- SSL_set_connect_state(ssl);
- else if (ssl->handshake_func == ssl->method->ssl_accept)
- SSL_set_accept_state(ssl);
- SSL_clear(ssl);
- if (b->next_bio != NULL)
- ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
- else if (ssl->rbio != NULL)
- ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
- else
- ret = 1;
- break;
- case BIO_CTRL_INFO:
- ret = 0;
- break;
- case BIO_C_SSL_MODE:
- if (num) /* client mode */
- SSL_set_connect_state(ssl);
- else
- SSL_set_accept_state(ssl);
- break;
- case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
- ret = bs->renegotiate_timeout;
- if (num < 60)
- num = 5;
- bs->renegotiate_timeout = (unsigned long)num;
- bs->last_time = (unsigned long)time(NULL);
- break;
- case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
- ret = bs->renegotiate_count;
- if ((long)num >= 512)
- bs->renegotiate_count = (unsigned long)num;
- break;
- case BIO_C_GET_SSL_NUM_RENEGOTIATES:
- ret = bs->num_renegotiates;
- break;
- case BIO_C_SET_SSL:
- if (ssl != NULL) {
- ssl_free(b);
- if (!ssl_new(b))
- return 0;
- }
- b->shutdown = (int)num;
- ssl = (SSL *)ptr;
- ((BIO_SSL *)b->ptr)->ssl = ssl;
- bio = SSL_get_rbio(ssl);
- if (bio != NULL) {
- if (b->next_bio != NULL)
- BIO_push(bio, b->next_bio);
- b->next_bio = bio;
- CRYPTO_add(&bio->references, 1, CRYPTO_LOCK_BIO);
- }
- b->init = 1;
- break;
- case BIO_C_GET_SSL:
- if (ptr != NULL) {
- sslp = (SSL **)ptr;
- *sslp = ssl;
- } else
- ret = 0;
- break;
- case BIO_CTRL_GET_CLOSE:
- ret = b->shutdown;
- break;
- case BIO_CTRL_SET_CLOSE:
- b->shutdown = (int)num;
- break;
- case BIO_CTRL_WPENDING:
- ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
- break;
- case BIO_CTRL_PENDING:
- ret = SSL_pending(ssl);
- if (ret == 0)
- ret = BIO_pending(ssl->rbio);
- break;
- case BIO_CTRL_FLUSH:
- BIO_clear_retry_flags(b);
- ret = BIO_ctrl(ssl->wbio, cmd, num, ptr);
- BIO_copy_next_retry(b);
- break;
- case BIO_CTRL_PUSH:
- if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio)) {
- SSL_set_bio(ssl, b->next_bio, b->next_bio);
- CRYPTO_add(&b->next_bio->references, 1, CRYPTO_LOCK_BIO);
- }
- break;
- case BIO_CTRL_POP:
- /* Only detach if we are the BIO explicitly being popped */
- if (b == ptr) {
- /*
- * Shouldn't happen in practice because the rbio and wbio are the
- * same when pushed.
- */
- if (ssl->rbio != ssl->wbio)
- BIO_free_all(ssl->wbio);
- if (b->next_bio != NULL)
- CRYPTO_add(&b->next_bio->references, -1, CRYPTO_LOCK_BIO);
- ssl->wbio = NULL;
- ssl->rbio = NULL;
- }
- break;
- case BIO_C_DO_STATE_MACHINE:
- BIO_clear_retry_flags(b);
- b->retry_reason = 0;
- ret = (int)SSL_do_handshake(ssl);
- switch (SSL_get_error(ssl, (int)ret)) {
- case SSL_ERROR_WANT_READ:
- BIO_set_flags(b, BIO_FLAGS_READ | BIO_FLAGS_SHOULD_RETRY);
- break;
- case SSL_ERROR_WANT_WRITE:
- BIO_set_flags(b, BIO_FLAGS_WRITE | BIO_FLAGS_SHOULD_RETRY);
- break;
- case SSL_ERROR_WANT_CONNECT:
- BIO_set_flags(b, BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY);
- b->retry_reason = b->next_bio->retry_reason;
- break;
- case SSL_ERROR_WANT_X509_LOOKUP:
- BIO_set_retry_special(b);
- b->retry_reason = BIO_RR_SSL_X509_LOOKUP;
- break;
- default:
- break;
- }
- break;
- case BIO_CTRL_DUP:
- dbio = (BIO *)ptr;
- if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
- SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
- ((BIO_SSL *)dbio->ptr)->ssl = SSL_dup(ssl);
- ((BIO_SSL *)dbio->ptr)->renegotiate_count =
- ((BIO_SSL *)b->ptr)->renegotiate_count;
- ((BIO_SSL *)dbio->ptr)->byte_count = ((BIO_SSL *)b->ptr)->byte_count;
- ((BIO_SSL *)dbio->ptr)->renegotiate_timeout =
- ((BIO_SSL *)b->ptr)->renegotiate_timeout;
- ((BIO_SSL *)dbio->ptr)->last_time = ((BIO_SSL *)b->ptr)->last_time;
- ret = (((BIO_SSL *)dbio->ptr)->ssl != NULL);
- break;
- case BIO_C_GET_FD:
- ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
- break;
- case BIO_CTRL_SET_CALLBACK:
- {
- #if 0 /* FIXME: Should this be used? -- Richard
- * Levitte */
- SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- ret = -1;
- #else
- ret = 0;
- #endif
- }
- break;
- case BIO_CTRL_GET_CALLBACK:
- {
- void (**fptr) (const SSL *xssl, int type, int val);
- fptr = (void (**)(const SSL *xssl, int type, int val))ptr;
- *fptr = SSL_get_info_callback(ssl);
- }
- break;
- default:
- ret = BIO_ctrl(ssl->rbio, cmd, num, ptr);
- break;
- }
- return (ret);
- }
- static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
- {
- SSL *ssl;
- BIO_SSL *bs;
- long ret = 1;
- bs = (BIO_SSL *)b->ptr;
- ssl = bs->ssl;
- switch (cmd) {
- case BIO_CTRL_SET_CALLBACK:
- {
- /*
- * FIXME: setting this via a completely different prototype seems
- * like a crap idea
- */
- SSL_set_info_callback(ssl, (void (*)(const SSL *, int, int))fp);
- }
- break;
- default:
- ret = BIO_callback_ctrl(ssl->rbio, cmd, fp);
- break;
- }
- return (ret);
- }
- static int ssl_puts(BIO *bp, const char *str)
- {
- int n, ret;
- n = strlen(str);
- ret = BIO_write(bp, str, n);
- return (ret);
- }
- BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)
- {
- #ifndef OPENSSL_NO_SOCK
- BIO *ret = NULL, *buf = NULL, *ssl = NULL;
- if ((buf = BIO_new(BIO_f_buffer())) == NULL)
- return (NULL);
- if ((ssl = BIO_new_ssl_connect(ctx)) == NULL)
- goto err;
- if ((ret = BIO_push(buf, ssl)) == NULL)
- goto err;
- return (ret);
- err:
- if (buf != NULL)
- BIO_free(buf);
- if (ssl != NULL)
- BIO_free(ssl);
- #endif
- return (NULL);
- }
- BIO *BIO_new_ssl_connect(SSL_CTX *ctx)
- {
- #ifndef OPENSSL_NO_SOCK
- BIO *ret = NULL, *con = NULL, *ssl = NULL;
- if ((con = BIO_new(BIO_s_connect())) == NULL)
- return (NULL);
- if ((ssl = BIO_new_ssl(ctx, 1)) == NULL)
- goto err;
- if ((ret = BIO_push(ssl, con)) == NULL)
- goto err;
- return (ret);
- err:
- if (con != NULL)
- BIO_free(con);
- #endif
- return (NULL);
- }
- BIO *BIO_new_ssl(SSL_CTX *ctx, int client)
- {
- BIO *ret;
- SSL *ssl;
- if ((ret = BIO_new(BIO_f_ssl())) == NULL)
- return (NULL);
- if ((ssl = SSL_new(ctx)) == NULL) {
- BIO_free(ret);
- return (NULL);
- }
- if (client)
- SSL_set_connect_state(ssl);
- else
- SSL_set_accept_state(ssl);
- BIO_set_ssl(ret, ssl, BIO_CLOSE);
- return (ret);
- }
- int BIO_ssl_copy_session_id(BIO *t, BIO *f)
- {
- t = BIO_find_type(t, BIO_TYPE_SSL);
- f = BIO_find_type(f, BIO_TYPE_SSL);
- if ((t == NULL) || (f == NULL))
- return (0);
- if ((((BIO_SSL *)t->ptr)->ssl == NULL) ||
- (((BIO_SSL *)f->ptr)->ssl == NULL))
- return (0);
- SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl, ((BIO_SSL *)f->ptr)->ssl);
- return (1);
- }
- void BIO_ssl_shutdown(BIO *b)
- {
- SSL *s;
- while (b != NULL) {
- if (b->method->type == BIO_TYPE_SSL) {
- s = ((BIO_SSL *)b->ptr)->ssl;
- SSL_shutdown(s);
- break;
- }
- b = b->next_bio;
- }
- }
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