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1 /* crypto/bio/bf_null.c */ |
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2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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3 * All rights reserved. |
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4 * |
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5 * This package is an SSL implementation written |
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6 * by Eric Young (eay@cryptsoft.com). |
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7 * The implementation was written so as to conform with Netscapes SSL. |
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8 * |
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9 * This library is free for commercial and non-commercial use as long as |
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10 * the following conditions are aheared to. The following conditions |
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11 * apply to all code found in this distribution, be it the RC4, RSA, |
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12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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13 * included with this distribution is covered by the same copyright terms |
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14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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15 * |
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16 * Copyright remains Eric Young's, and as such any Copyright notices in |
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17 * the code are not to be removed. |
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18 * If this package is used in a product, Eric Young should be given attribution |
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19 * as the author of the parts of the library used. |
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20 * This can be in the form of a textual message at program startup or |
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21 * in documentation (online or textual) provided with the package. |
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22 * |
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23 * Redistribution and use in source and binary forms, with or without |
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24 * modification, are permitted provided that the following conditions |
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25 * are met: |
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26 * 1. Redistributions of source code must retain the copyright |
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27 * notice, this list of conditions and the following disclaimer. |
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28 * 2. Redistributions in binary form must reproduce the above copyright |
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29 * notice, this list of conditions and the following disclaimer in the |
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30 * documentation and/or other materials provided with the distribution. |
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31 * 3. All advertising materials mentioning features or use of this software |
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32 * must display the following acknowledgement: |
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33 * "This product includes cryptographic software written by |
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34 * Eric Young (eay@cryptsoft.com)" |
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35 * The word 'cryptographic' can be left out if the rouines from the library |
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36 * being used are not cryptographic related :-). |
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37 * 4. If you include any Windows specific code (or a derivative thereof) from |
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38 * the apps directory (application code) you must include an acknowledgement: |
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39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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40 * |
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41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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51 * SUCH DAMAGE. |
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52 * |
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53 * The licence and distribution terms for any publically available version or |
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54 * derivative of this code cannot be changed. i.e. this code cannot simply be |
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55 * copied and put under another distribution licence |
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56 * [including the GNU Public Licence.] |
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57 */ |
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58 |
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59 #include <stdio.h> |
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60 #include <errno.h> |
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61 #include "cryptlib.h" |
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62 #include <openssl/bio.h> |
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63 |
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64 /* BIO_put and BIO_get both add to the digest, |
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65 * BIO_gets returns the digest */ |
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66 |
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67 static int nullf_write(BIO *h, const char *buf, int num); |
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68 static int nullf_read(BIO *h, char *buf, int size); |
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69 static int nullf_puts(BIO *h, const char *str); |
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70 static int nullf_gets(BIO *h, char *str, int size); |
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71 static long nullf_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
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72 static int nullf_new(BIO *h); |
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73 static int nullf_free(BIO *data); |
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74 static long nullf_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); |
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75 static BIO_METHOD methods_nullf= |
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76 { |
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77 BIO_TYPE_NULL_FILTER, |
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78 "NULL filter", |
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79 nullf_write, |
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80 nullf_read, |
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81 nullf_puts, |
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82 nullf_gets, |
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83 nullf_ctrl, |
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84 nullf_new, |
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85 nullf_free, |
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86 nullf_callback_ctrl, |
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87 }; |
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88 |
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89 EXPORT_C BIO_METHOD *BIO_f_null(void) |
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90 { |
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91 return(&methods_nullf); |
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92 } |
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93 |
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94 static int nullf_new(BIO *bi) |
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95 { |
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96 bi->init=1; |
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97 bi->ptr=NULL; |
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98 bi->flags=0; |
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99 return(1); |
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100 } |
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101 |
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102 static int nullf_free(BIO *a) |
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103 { |
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104 if (a == NULL) return(0); |
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105 /* a->ptr=NULL; |
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106 a->init=0; |
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107 a->flags=0;*/ |
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108 return(1); |
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109 } |
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110 |
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111 static int nullf_read(BIO *b, char *out, int outl) |
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112 { |
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113 int ret=0; |
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114 |
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115 if (out == NULL) return(0); |
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116 if (b->next_bio == NULL) return(0); |
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117 ret=BIO_read(b->next_bio,out,outl); |
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118 BIO_clear_retry_flags(b); |
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119 BIO_copy_next_retry(b); |
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120 return(ret); |
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121 } |
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122 |
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123 static int nullf_write(BIO *b, const char *in, int inl) |
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124 { |
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125 int ret=0; |
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126 |
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127 if ((in == NULL) || (inl <= 0)) return(0); |
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128 if (b->next_bio == NULL) return(0); |
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129 ret=BIO_write(b->next_bio,in,inl); |
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130 BIO_clear_retry_flags(b); |
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131 BIO_copy_next_retry(b); |
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132 return(ret); |
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133 } |
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134 |
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135 static long nullf_ctrl(BIO *b, int cmd, long num, void *ptr) |
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136 { |
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137 long ret; |
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138 |
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139 if (b->next_bio == NULL) return(0); |
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140 switch(cmd) |
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141 { |
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142 case BIO_C_DO_STATE_MACHINE: |
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143 BIO_clear_retry_flags(b); |
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144 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); |
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145 BIO_copy_next_retry(b); |
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146 break; |
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147 case BIO_CTRL_DUP: |
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148 ret=0L; |
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149 break; |
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150 default: |
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151 ret=BIO_ctrl(b->next_bio,cmd,num,ptr); |
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152 } |
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153 return(ret); |
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154 } |
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155 |
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156 static long nullf_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) |
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157 { |
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158 long ret=1; |
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159 |
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160 if (b->next_bio == NULL) return(0); |
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161 switch (cmd) |
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162 { |
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163 default: |
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164 ret=BIO_callback_ctrl(b->next_bio,cmd,fp); |
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165 break; |
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166 } |
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167 return(ret); |
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168 } |
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169 |
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170 static int nullf_gets(BIO *bp, char *buf, int size) |
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171 { |
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172 if (bp->next_bio == NULL) return(0); |
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173 return(BIO_gets(bp->next_bio,buf,size)); |
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174 } |
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175 |
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176 |
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177 static int nullf_puts(BIO *bp, const char *str) |
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178 { |
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179 if (bp->next_bio == NULL) return(0); |
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180 return(BIO_puts(bp->next_bio,str)); |
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181 } |
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182 |
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183 |