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| 1 /* crypto/asn1/a_d2i_fp.c */ | |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This package is an SSL implementation written | |
| 6 * by Eric Young (eay@cryptsoft.com). | |
| 7 * The implementation was written so as to conform with Netscapes SSL. | |
| 8 * | |
| 9 * This library is free for commercial and non-commercial use as long as | |
| 10 * the following conditions are aheared to. The following conditions | |
| 11 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 13 * included with this distribution is covered by the same copyright terms | |
| 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 15 * | |
| 16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 17 * the code are not to be removed. | |
| 18 * If this package is used in a product, Eric Young should be given attribution | |
| 19 * as the author of the parts of the library used. | |
| 20 * This can be in the form of a textual message at program startup or | |
| 21 * in documentation (online or textual) provided with the package. | |
| 22 * | |
| 23 * Redistribution and use in source and binary forms, with or without | |
| 24 * modification, are permitted provided that the following conditions | |
| 25 * are met: | |
| 26 * 1. Redistributions of source code must retain the copyright | |
| 27 * notice, this list of conditions and the following disclaimer. | |
| 28 * 2. Redistributions in binary form must reproduce the above copyright | |
| 29 * notice, this list of conditions and the following disclaimer in the | |
| 30 * documentation and/or other materials provided with the distribution. | |
| 31 * 3. All advertising materials mentioning features or use of this software | |
| 32 * must display the following acknowledgement: | |
| 33 * "This product includes cryptographic software written by | |
| 34 * Eric Young (eay@cryptsoft.com)" | |
| 35 * The word 'cryptographic' can be left out if the rouines from the library | |
| 36 * being used are not cryptographic related :-). | |
| 37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 38 * the apps directory (application code) you must include an acknowledgement: | |
| 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 40 * | |
| 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 51 * SUCH DAMAGE. | |
| 52 * | |
| 53 * The licence and distribution terms for any publically available version or | |
| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 55 * copied and put under another distribution licence | |
| 56 * [including the GNU Public Licence.] | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include <limits.h> | |
| 61 #include "cryptlib.h" | |
| 62 #include <openssl/buffer.h> | |
| 63 #include <openssl/asn1_mac.h> | |
| 64 | |
| 65 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb); | |
| 66 | |
| 67 #ifndef NO_OLD_ASN1 | |
| 68 #ifndef OPENSSL_NO_FP_API | |
| 69 | |
| 70 void *ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x) | |
| 71 { | |
| 72 BIO *b; | |
| 73 void *ret; | |
| 74 | |
| 75 if ((b=BIO_new(BIO_s_file())) == NULL) | |
| 76 { | |
| 77 ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB); | |
| 78 return(NULL); | |
| 79 } | |
| 80 BIO_set_fp(b,in,BIO_NOCLOSE); | |
| 81 ret=ASN1_d2i_bio(xnew,d2i,b,x); | |
| 82 BIO_free(b); | |
| 83 return(ret); | |
| 84 } | |
| 85 #endif | |
| 86 | |
| 87 void *ASN1_d2i_bio(void *(*xnew)(void), d2i_of_void *d2i, BIO *in, void **x) | |
| 88 { | |
| 89 BUF_MEM *b = NULL; | |
| 90 const unsigned char *p; | |
| 91 void *ret=NULL; | |
| 92 int len; | |
| 93 | |
| 94 len = asn1_d2i_read_bio(in, &b); | |
| 95 if(len < 0) goto err; | |
| 96 | |
| 97 p=(unsigned char *)b->data; | |
| 98 ret=d2i(x,&p,len); | |
| 99 err: | |
| 100 if (b != NULL) BUF_MEM_free(b); | |
| 101 return(ret); | |
| 102 } | |
| 103 | |
| 104 #endif | |
| 105 | |
| 106 void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x) | |
| 107 { | |
| 108 BUF_MEM *b = NULL; | |
| 109 const unsigned char *p; | |
| 110 void *ret=NULL; | |
| 111 int len; | |
| 112 | |
| 113 len = asn1_d2i_read_bio(in, &b); | |
| 114 if(len < 0) goto err; | |
| 115 | |
| 116 p=(const unsigned char *)b->data; | |
| 117 ret=ASN1_item_d2i(x,&p,len, it); | |
| 118 err: | |
| 119 if (b != NULL) BUF_MEM_free(b); | |
| 120 return(ret); | |
| 121 } | |
| 122 | |
| 123 #ifndef OPENSSL_NO_FP_API | |
| 124 void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x) | |
| 125 { | |
| 126 BIO *b; | |
| 127 char *ret; | |
| 128 | |
| 129 if ((b=BIO_new(BIO_s_file())) == NULL) | |
| 130 { | |
| 131 ASN1err(ASN1_F_ASN1_ITEM_D2I_FP,ERR_R_BUF_LIB); | |
| 132 return(NULL); | |
| 133 } | |
| 134 BIO_set_fp(b,in,BIO_NOCLOSE); | |
| 135 ret=ASN1_item_d2i_bio(it,b,x); | |
| 136 BIO_free(b); | |
| 137 return(ret); | |
| 138 } | |
| 139 #endif | |
| 140 | |
| 141 #define HEADER_SIZE 8 | |
| 142 static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb) | |
| 143 { | |
| 144 BUF_MEM *b; | |
| 145 unsigned char *p; | |
| 146 int i; | |
| 147 ASN1_const_CTX c; | |
| 148 size_t want=HEADER_SIZE; | |
| 149 int eos=0; | |
| 150 size_t off=0; | |
| 151 size_t len=0; | |
| 152 | |
| 153 b=BUF_MEM_new(); | |
| 154 if (b == NULL) | |
| 155 { | |
| 156 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); | |
| 157 return -1; | |
| 158 } | |
| 159 | |
| 160 ERR_clear_error(); | |
| 161 for (;;) | |
| 162 { | |
| 163 if (want >= (len-off)) | |
| 164 { | |
| 165 want-=(len-off); | |
| 166 | |
| 167 if (len + want < len || !BUF_MEM_grow_clean(b,len+want)) | |
| 168 { | |
| 169 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FA
ILURE); | |
| 170 goto err; | |
| 171 } | |
| 172 i=BIO_read(in,&(b->data[len]),want); | |
| 173 if ((i < 0) && ((len-off) == 0)) | |
| 174 { | |
| 175 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_NOT_ENOU
GH_DATA); | |
| 176 goto err; | |
| 177 } | |
| 178 if (i > 0) | |
| 179 { | |
| 180 if (len+i < len) | |
| 181 { | |
| 182 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_
TOO_LONG); | |
| 183 goto err; | |
| 184 } | |
| 185 len+=i; | |
| 186 } | |
| 187 } | |
| 188 /* else data already loaded */ | |
| 189 | |
| 190 p=(unsigned char *)&(b->data[off]); | |
| 191 c.p=p; | |
| 192 c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass), | |
| 193 len-off); | |
| 194 if (c.inf & 0x80) | |
| 195 { | |
| 196 unsigned long e; | |
| 197 | |
| 198 e=ERR_GET_REASON(ERR_peek_error()); | |
| 199 if (e != ASN1_R_TOO_LONG) | |
| 200 goto err; | |
| 201 else | |
| 202 ERR_clear_error(); /* clear error */ | |
| 203 } | |
| 204 i=c.p-p;/* header length */ | |
| 205 off+=i; /* end of data */ | |
| 206 | |
| 207 if (c.inf & 1) | |
| 208 { | |
| 209 /* no data body so go round again */ | |
| 210 eos++; | |
| 211 if (eos < 0) | |
| 212 { | |
| 213 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_HEADER_T
OO_LONG); | |
| 214 goto err; | |
| 215 } | |
| 216 want=HEADER_SIZE; | |
| 217 } | |
| 218 else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC)) | |
| 219 { | |
| 220 /* eos value, so go back and read another header */ | |
| 221 eos--; | |
| 222 if (eos <= 0) | |
| 223 break; | |
| 224 else | |
| 225 want=HEADER_SIZE; | |
| 226 } | |
| 227 else | |
| 228 { | |
| 229 /* suck in c.slen bytes of data */ | |
| 230 want=c.slen; | |
| 231 if (want > (len-off)) | |
| 232 { | |
| 233 want-=(len-off); | |
| 234 if (want > INT_MAX /* BIO_read takes an int leng
th */ || | |
| 235 len+want < len) | |
| 236 { | |
| 237 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
,ASN1_R_TOO_LONG); | |
| 238 goto err; | |
| 239 } | |
| 240 if (!BUF_MEM_grow_clean(b,len+want)) | |
| 241 { | |
| 242 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_M
ALLOC_FAILURE); | |
| 243 goto err; | |
| 244 } | |
| 245 while (want > 0) | |
| 246 { | |
| 247 i=BIO_read(in,&(b->data[len]),want); | |
| 248 if (i <= 0) | |
| 249 { | |
| 250 ASN1err(ASN1_F_ASN1_D2I_READ_BIO
, | |
| 251 ASN1_R_NOT_ENOUGH_DATA); | |
| 252 goto err; | |
| 253 } | |
| 254 /* This can't overflow because | |
| 255 * |len+want| didn't overflow. */ | |
| 256 len+=i; | |
| 257 want-=i; | |
| 258 } | |
| 259 } | |
| 260 if (off + c.slen < off) | |
| 261 { | |
| 262 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG
); | |
| 263 goto err; | |
| 264 } | |
| 265 off+=c.slen; | |
| 266 if (eos <= 0) | |
| 267 { | |
| 268 break; | |
| 269 } | |
| 270 else | |
| 271 want=HEADER_SIZE; | |
| 272 } | |
| 273 } | |
| 274 | |
| 275 if (off > INT_MAX) | |
| 276 { | |
| 277 ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG); | |
| 278 goto err; | |
| 279 } | |
| 280 | |
| 281 *pb = b; | |
| 282 return off; | |
| 283 err: | |
| 284 if (b != NULL) BUF_MEM_free(b); | |
| 285 return -1; | |
| 286 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master