diff options
Diffstat (limited to 'openssl/crypto/bio/bf_nbio.c')
| -rw-r--r-- | openssl/crypto/bio/bf_nbio.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/openssl/crypto/bio/bf_nbio.c b/openssl/crypto/bio/bf_nbio.c new file mode 100644 index 0000000..4842bb4 --- /dev/null +++ b/openssl/crypto/bio/bf_nbio.c @@ -0,0 +1,253 @@ +/* crypto/bio/bf_nbio.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 <errno.h> +#include "cryptlib.h" +#include <openssl/rand.h> +#include <openssl/bio.h> + +/* + * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest + */ + +static int nbiof_write(BIO *h, const char *buf, int num); +static int nbiof_read(BIO *h, char *buf, int size); +static int nbiof_puts(BIO *h, const char *str); +static int nbiof_gets(BIO *h, char *str, int size); +static long nbiof_ctrl(BIO *h, int cmd, long arg1, void *arg2); +static int nbiof_new(BIO *h); +static int nbiof_free(BIO *data); +static long nbiof_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); +typedef struct nbio_test_st { + /* only set if we sent a 'should retry' error */ + int lrn; + int lwn; +} NBIO_TEST; + +static BIO_METHOD methods_nbiof = { + BIO_TYPE_NBIO_TEST, + "non-blocking IO test filter", + nbiof_write, + nbiof_read, + nbiof_puts, + nbiof_gets, + nbiof_ctrl, + nbiof_new, + nbiof_free, + nbiof_callback_ctrl, +}; + +BIO_METHOD *BIO_f_nbio_test(void) +{ + return (&methods_nbiof); +} + +static int nbiof_new(BIO *bi) +{ + NBIO_TEST *nt; + + if (!(nt = (NBIO_TEST *)OPENSSL_malloc(sizeof(NBIO_TEST)))) + return (0); + nt->lrn = -1; + nt->lwn = -1; + bi->ptr = (char *)nt; + bi->init = 1; + bi->flags = 0; + return (1); +} + +static int nbiof_free(BIO *a) +{ + if (a == NULL) + return (0); + if (a->ptr != NULL) + OPENSSL_free(a->ptr); + a->ptr = NULL; + a->init = 0; + a->flags = 0; + return (1); +} + +static int nbiof_read(BIO *b, char *out, int outl) +{ + int ret = 0; +#if 1 + int num; + unsigned char n; +#endif + + if (out == NULL) + return (0); + if (b->next_bio == NULL) + return (0); + + BIO_clear_retry_flags(b); +#if 1 + if (RAND_bytes(&n, 1) <= 0) + return -1; + num = (n & 0x07); + + if (outl > num) + outl = num; + + if (num == 0) { + ret = -1; + BIO_set_retry_read(b); + } else +#endif + { + ret = BIO_read(b->next_bio, out, outl); + if (ret < 0) + BIO_copy_next_retry(b); + } + return (ret); +} + +static int nbiof_write(BIO *b, const char *in, int inl) +{ + NBIO_TEST *nt; + int ret = 0; + int num; + unsigned char n; + + if ((in == NULL) || (inl <= 0)) + return (0); + if (b->next_bio == NULL) + return (0); + nt = (NBIO_TEST *)b->ptr; + + BIO_clear_retry_flags(b); + +#if 1 + if (nt->lwn > 0) { + num = nt->lwn; + nt->lwn = 0; + } else { + if (RAND_bytes(&n, 1) <= 0) + return -1; + num = (n & 7); + } + + if (inl > num) + inl = num; + + if (num == 0) { + ret = -1; + BIO_set_retry_write(b); + } else +#endif + { + ret = BIO_write(b->next_bio, in, inl); + if (ret < 0) { + BIO_copy_next_retry(b); + nt->lwn = inl; + } + } + return (ret); +} + +static long nbiof_ctrl(BIO *b, int cmd, long num, void *ptr) +{ + long ret; + + if (b->next_bio == NULL) + return (0); + switch (cmd) { + case BIO_C_DO_STATE_MACHINE: + BIO_clear_retry_flags(b); + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + BIO_copy_next_retry(b); + break; + case BIO_CTRL_DUP: + ret = 0L; + break; + default: + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + break; + } + return (ret); +} + +static long nbiof_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) +{ + long ret = 1; + + if (b->next_bio == NULL) + return (0); + switch (cmd) { + default: + ret = BIO_callback_ctrl(b->next_bio, cmd, fp); + break; + } + return (ret); +} + +static int nbiof_gets(BIO *bp, char *buf, int size) +{ + if (bp->next_bio == NULL) + return (0); + return (BIO_gets(bp->next_bio, buf, size)); +} + +static int nbiof_puts(BIO *bp, const char *str) +{ + if (bp->next_bio == NULL) + return (0); + return (BIO_puts(bp->next_bio, str)); +} |