diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/bio/bf_nbio.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/bio/bf_nbio.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/bio/bf_nbio.c b/openssl-1.1.0h/crypto/bio/bf_nbio.c new file mode 100644 index 0000000..3328506 --- /dev/null +++ b/openssl-1.1.0h/crypto/bio/bf_nbio.c @@ -0,0 +1,194 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <errno.h> +#include "bio_lcl.h" +#include "internal/cryptlib.h" +#include <openssl/rand.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 const 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, +}; + +const BIO_METHOD *BIO_f_nbio_test(void) +{ + return (&methods_nbiof); +} + +static int nbiof_new(BIO *bi) +{ + NBIO_TEST *nt; + + if ((nt = OPENSSL_zalloc(sizeof(*nt))) == NULL) + return (0); + nt->lrn = -1; + nt->lwn = -1; + bi->ptr = (char *)nt; + bi->init = 1; + return (1); +} + +static int nbiof_free(BIO *a) +{ + if (a == NULL) + return (0); + 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; + int num; + unsigned char n; + + if (out == NULL) + return (0); + if (b->next_bio == NULL) + return (0); + + BIO_clear_retry_flags(b); + 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 { + 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 (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 { + 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)); +} |