crypto/bio/bio_meth.c

   1 /*
   2  * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include "bio_lcl.h"
  11 #include <internal/thread_once.h>
  12
  13 CRYPTO_RWLOCK *bio_type_lock = NULL;
  14 static CRYPTO_ONCE bio_type_init = CRYPTO_ONCE_STATIC_INIT;
  15
  16 DEFINE_RUN_ONCE_STATIC(do_bio_type_init)
  17 {
  18     bio_type_lock = CRYPTO_THREAD_lock_new();
  19     return bio_type_lock != NULL;
  20 }
  21
  22 int BIO_get_new_index()
  23 {
  24     static int bio_count = BIO_TYPE_START;
  25     int newval;
  26
  27     if (!RUN_ONCE(&bio_type_init, do_bio_type_init)) {
  28         BIOerr(BIO_F_BIO_GET_NEW_INDEX, ERR_R_MALLOC_FAILURE);
  29         return -1;
  30     }
  31     if (!CRYPTO_atomic_add(&bio_count, 1, &newval, bio_type_lock))
  32         return -1;
  33     return newval;
  34 }
  35
  36 BIO_METHOD *BIO_meth_new(int type, const char *name)
  37 {
  38     BIO_METHOD *biom = OPENSSL_zalloc(sizeof(BIO_METHOD));
  39
  40     if (biom != NULL) {
  41         biom->type = type;
  42         biom->name = name;
  43     }
  44     return biom;
  45 }
  46
  47 void BIO_meth_free(BIO_METHOD *biom)
  48 {
  49     OPENSSL_free(biom);
  50 }
  51
  52 int (*BIO_meth_get_write(BIO_METHOD *biom)) (BIO *, const char *, int)
  53 {
  54     return biom->bwrite;
  55 }
  56
  57 int BIO_meth_set_write(BIO_METHOD *biom,
  58                        int (*bwrite) (BIO *, const char *, int))
  59 {
  60     biom->bwrite = bwrite;
  61     return 1;
  62 }
  63
  64 int (*BIO_meth_get_read(BIO_METHOD *biom)) (BIO *, char *, int)
  65 {
  66     return biom->bread_old;
  67 }
  68
  69 int (*BIO_meth_get_read_ex(BIO_METHOD *biom)) (BIO *, char *, size_t, size_t *)
  70 {
  71     return biom->bread;
  72 }
  73
  74 /* Conversion for old style bread to new style */
  75 int bread_conv(BIO *bio, char *out, size_t outl, size_t *read)
  76 {
  77     int ret;
  78
  79     if (outl > INT_MAX)
  80         return 0;
  81
  82     ret = bio->method->bread_old(bio, out, (int)outl);
  83
  84     if (ret <= 0) {
  85         *read = 0;
  86         return ret;
  87     }
  88
  89     *read = (size_t)ret;
  90
  91     return 1;
  92 }
  93
  94 int BIO_meth_set_read(BIO_METHOD *biom,
  95                       int (*bread) (BIO *, char *, int))
  96 {
  97     biom->bread_old = bread;
  98     biom->bread = bread_conv;
  99     return 1;
 100 }
 101
 102 int BIO_meth_set_read_ex(BIO_METHOD *biom,
 103                          int (*bread) (BIO *, char *, size_t, size_t *))
 104 {
 105     biom->bread = bread;
 106     return 1;
 107 }
 108
 109 int (*BIO_meth_get_puts(BIO_METHOD *biom)) (BIO *, const char *)
 110 {
 111     return biom->bputs;
 112 }
 113
 114 int BIO_meth_set_puts(BIO_METHOD *biom,
 115                       int (*bputs) (BIO *, const char *))
 116 {
 117     biom->bputs = bputs;
 118     return 1;
 119 }
 120
 121 int (*BIO_meth_get_gets(BIO_METHOD *biom)) (BIO *, char *, int)
 122 {
 123     return biom->bgets;
 124 }
 125
 126 int BIO_meth_set_gets(BIO_METHOD *biom,
 127                       int (*bgets) (BIO *, char *, int))
 128 {
 129     biom->bgets = bgets;
 130     return 1;
 131 }
 132
 133 long (*BIO_meth_get_ctrl(BIO_METHOD *biom)) (BIO *, int, long, void *)
 134 {
 135     return biom->ctrl;
 136 }
 137
 138 int BIO_meth_set_ctrl(BIO_METHOD *biom,
 139                       long (*ctrl) (BIO *, int, long, void *))
 140 {
 141     biom->ctrl = ctrl;
 142     return 1;
 143 }
 144
 145 int (*BIO_meth_get_create(BIO_METHOD *biom)) (BIO *)
 146 {
 147     return biom->create;
 148 }
 149
 150 int BIO_meth_set_create(BIO_METHOD *biom, int (*create) (BIO *))
 151 {
 152     biom->create = create;
 153     return 1;
 154 }
 155
 156 int (*BIO_meth_get_destroy(BIO_METHOD *biom)) (BIO *)
 157 {
 158     return biom->destroy;
 159 }
 160
 161 int BIO_meth_set_destroy(BIO_METHOD *biom, int (*destroy) (BIO *))
 162 {
 163     biom->destroy = destroy;
 164     return 1;
 165 }
 166
 167 long (*BIO_meth_get_callback_ctrl(BIO_METHOD *biom)) (BIO *, int, bio_info_cb *)
 168 {
 169     return biom->callback_ctrl;
 170 }
 171
 172 int BIO_meth_set_callback_ctrl(BIO_METHOD *biom,
 173                                long (*callback_ctrl) (BIO *, int,
 174                                                       bio_info_cb *))
 175 {
 176     biom->callback_ctrl = callback_ctrl;
 177     return 1;
 178 }