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| 1 /* crypto/asn1/a_bitstr.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 "cryptlib.h" | |
| 61 #include <openssl/asn1.h> | |
| 62 | |
| 63 int ASN1_BIT_STRING_set(ASN1_BIT_STRING *x, unsigned char *d, int len) | |
| 64 { return M_ASN1_BIT_STRING_set(x, d, len); } | |
| 65 | |
| 66 int i2c_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp) | |
| 67 { | |
| 68 int ret,j,bits,len; | |
| 69 unsigned char *p,*d; | |
| 70 | |
| 71 if (a == NULL) return(0); | |
| 72 | |
| 73 len=a->length; | |
| 74 | |
| 75 if (len > 0) | |
| 76 { | |
| 77 if (a->flags & ASN1_STRING_FLAG_BITS_LEFT) | |
| 78 { | |
| 79 bits=(int)a->flags&0x07; | |
| 80 } | |
| 81 else | |
| 82 { | |
| 83 for ( ; len > 0; len--) | |
| 84 { | |
| 85 if (a->data[len-1]) break; | |
| 86 } | |
| 87 j=a->data[len-1]; | |
| 88 if (j & 0x01) bits=0; | |
| 89 else if (j & 0x02) bits=1; | |
| 90 else if (j & 0x04) bits=2; | |
| 91 else if (j & 0x08) bits=3; | |
| 92 else if (j & 0x10) bits=4; | |
| 93 else if (j & 0x20) bits=5; | |
| 94 else if (j & 0x40) bits=6; | |
| 95 else if (j & 0x80) bits=7; | |
| 96 else bits=0; /* should not happen */ | |
| 97 } | |
| 98 } | |
| 99 else | |
| 100 bits=0; | |
| 101 | |
| 102 ret=1+len; | |
| 103 if (pp == NULL) return(ret); | |
| 104 | |
| 105 p= *pp; | |
| 106 | |
| 107 *(p++)=(unsigned char)bits; | |
| 108 d=a->data; | |
| 109 memcpy(p,d,len); | |
| 110 p+=len; | |
| 111 if (len > 0) p[-1]&=(0xff<<bits); | |
| 112 *pp=p; | |
| 113 return(ret); | |
| 114 } | |
| 115 | |
| 116 ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a, | |
| 117 const unsigned char **pp, long len) | |
| 118 { | |
| 119 ASN1_BIT_STRING *ret=NULL; | |
| 120 const unsigned char *p; | |
| 121 unsigned char *s; | |
| 122 int i; | |
| 123 | |
| 124 if (len < 1) | |
| 125 { | |
| 126 i=ASN1_R_STRING_TOO_SHORT; | |
| 127 goto err; | |
| 128 } | |
| 129 | |
| 130 if ((a == NULL) || ((*a) == NULL)) | |
| 131 { | |
| 132 if ((ret=M_ASN1_BIT_STRING_new()) == NULL) return(NULL); | |
| 133 } | |
| 134 else | |
| 135 ret=(*a); | |
| 136 | |
| 137 p= *pp; | |
| 138 i= *(p++); | |
| 139 /* We do this to preserve the settings. If we modify | |
| 140 * the settings, via the _set_bit function, we will recalculate | |
| 141 * on output */ | |
| 142 ret->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear */ | |
| 143 ret->flags|=(ASN1_STRING_FLAG_BITS_LEFT|(i&0x07)); /* set */ | |
| 144 | |
| 145 if (len-- > 1) /* using one because of the bits left byte */ | |
| 146 { | |
| 147 s=(unsigned char *)OPENSSL_malloc((int)len); | |
| 148 if (s == NULL) | |
| 149 { | |
| 150 i=ERR_R_MALLOC_FAILURE; | |
| 151 goto err; | |
| 152 } | |
| 153 memcpy(s,p,(int)len); | |
| 154 s[len-1]&=(0xff<<i); | |
| 155 p+=len; | |
| 156 } | |
| 157 else | |
| 158 s=NULL; | |
| 159 | |
| 160 ret->length=(int)len; | |
| 161 if (ret->data != NULL) OPENSSL_free(ret->data); | |
| 162 ret->data=s; | |
| 163 ret->type=V_ASN1_BIT_STRING; | |
| 164 if (a != NULL) (*a)=ret; | |
| 165 *pp=p; | |
| 166 return(ret); | |
| 167 err: | |
| 168 ASN1err(ASN1_F_C2I_ASN1_BIT_STRING,i); | |
| 169 if ((ret != NULL) && ((a == NULL) || (*a != ret))) | |
| 170 M_ASN1_BIT_STRING_free(ret); | |
| 171 return(NULL); | |
| 172 } | |
| 173 | |
| 174 /* These next 2 functions from Goetz Babin-Ebell <babinebell@trustcenter.de> | |
| 175 */ | |
| 176 int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value) | |
| 177 { | |
| 178 int w,v,iv; | |
| 179 unsigned char *c; | |
| 180 | |
| 181 w=n/8; | |
| 182 v=1<<(7-(n&0x07)); | |
| 183 iv= ~v; | |
| 184 if (!value) v=0; | |
| 185 | |
| 186 if (a == NULL) | |
| 187 return 0; | |
| 188 | |
| 189 a->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear, set on write */ | |
| 190 | |
| 191 if ((a->length < (w+1)) || (a->data == NULL)) | |
| 192 { | |
| 193 if (!value) return(1); /* Don't need to set */ | |
| 194 if (a->data == NULL) | |
| 195 c=(unsigned char *)OPENSSL_malloc(w+1); | |
| 196 else | |
| 197 c=(unsigned char *)OPENSSL_realloc_clean(a->data, | |
| 198 a->length, | |
| 199 w+1); | |
| 200 if (c == NULL) | |
| 201 { | |
| 202 ASN1err(ASN1_F_ASN1_BIT_STRING_SET_BIT,ERR_R_MALLOC_FAIL
URE); | |
| 203 return 0; | |
| 204 } | |
| 205 if (w+1-a->length > 0) memset(c+a->length, 0, w+1-a->length); | |
| 206 a->data=c; | |
| 207 a->length=w+1; | |
| 208 } | |
| 209 a->data[w]=((a->data[w])&iv)|v; | |
| 210 while ((a->length > 0) && (a->data[a->length-1] == 0)) | |
| 211 a->length--; | |
| 212 return(1); | |
| 213 } | |
| 214 | |
| 215 int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n) | |
| 216 { | |
| 217 int w,v; | |
| 218 | |
| 219 w=n/8; | |
| 220 v=1<<(7-(n&0x07)); | |
| 221 if ((a == NULL) || (a->length < (w+1)) || (a->data == NULL)) | |
| 222 return(0); | |
| 223 return((a->data[w]&v) != 0); | |
| 224 } | |
| 225 | |
| 226 /* | |
| 227 * Checks if the given bit string contains only bits specified by | |
| 228 * the flags vector. Returns 0 if there is at least one bit set in 'a' | |
| 229 * which is not specified in 'flags', 1 otherwise. | |
| 230 * 'len' is the length of 'flags'. | |
| 231 */ | |
| 232 int ASN1_BIT_STRING_check(ASN1_BIT_STRING *a, | |
| 233 unsigned char *flags, int flags_len) | |
| 234 { | |
| 235 int i, ok; | |
| 236 /* Check if there is one bit set at all. */ | |
| 237 if (!a || !a->data) return 1; | |
| 238 | |
| 239 /* Check each byte of the internal representation of the bit string. */ | |
| 240 ok = 1; | |
| 241 for (i = 0; i < a->length && ok; ++i) | |
| 242 { | |
| 243 unsigned char mask = i < flags_len ? ~flags[i] : 0xff; | |
| 244 /* We are done if there is an unneeded bit set. */ | |
| 245 ok = (a->data[i] & mask) == 0; | |
| 246 } | |
| 247 return ok; | |
| 248 } | |
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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