1 /* crypto/asn1/f_enum.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/buffer.h> 62 #include <openssl/asn1.h> 63 64 /* Based on a_int.c: equivalent ENUMERATED functions */ 65 66 int i2a_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *a) 67 { 68 int i,n=0; 69 static const char *h="0123456789ABCDEF"; 70 char buf[2]; 71 72 if (a == NULL) return(0); 73 74 if (a->length == 0) 75 { 76 if (BIO_write(bp,"00",2) != 2) goto err; 77 n=2; 78 } 79 else 80 { 81 for (i=0; i<a->length; i++) 82 { 83 if ((i != 0) && (i%35 == 0)) 84 { 85 if (BIO_write(bp,"\\\n",2) != 2) goto err; 86 n+=2; 87 } 88 buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f]; 89 buf[1]=h[((unsigned char)a->data[i] )&0x0f]; 90 if (BIO_write(bp,buf,2) != 2) goto err; 91 n+=2; 92 } 93 } 94 return(n); 95 err: 96 return(-1); 97 } 98 99 int a2i_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *bs, char *buf, int size) 100 { 101 int ret=0; 102 int i,j,k,m,n,again,bufsize; 103 unsigned char *s=NULL,*sp; 104 unsigned char *bufp; 105 int num=0,slen=0,first=1; 106 107 bs->type=V_ASN1_ENUMERATED; 108 109 bufsize=BIO_gets(bp,buf,size); 110 for (;;) 111 { 112 if (bufsize < 1) goto err_sl; 113 i=bufsize; 114 if (buf[i-1] == '\n') buf[--i]='\0'; 115 if (i == 0) goto err_sl; 116 if (buf[i-1] == '\r') buf[--i]='\0'; 117 if (i == 0) goto err_sl; 118 again=(buf[i-1] == '\\'); 119 120 for (j=0; j<i; j++) 121 { 122 if (!( ((buf[j] >= '0') && (buf[j] <= '9')) || 123 ((buf[j] >= 'a') && (buf[j] <= 'f')) || 124 ((buf[j] >= 'A') && (buf[j] <= 'F')))) 125 { 126 i=j; 127 break; 128 } 129 } 130 buf[i]='\0'; 131 /* We have now cleared all the crap off the end of the 132 * line */ 133 if (i < 2) goto err_sl; 134 135 bufp=(unsigned char *)buf; 136 if (first) 137 { 138 first=0; 139 if ((bufp[0] == '0') && (buf[1] == '0')) 140 { 141 bufp+=2; 142 i-=2; 143 } 144 } 145 k=0; 146 i-=again; 147 if (i%2 != 0) 148 { 149 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ASN1_R_ODD_NUMBER_OF_CHARS); 150 goto err; 151 } 152 i/=2; 153 if (num+i > slen) 154 { 155 if (s == NULL) 156 sp=(unsigned char *)OPENSSL_malloc( 157 (unsigned int)num+i*2); 158 else 159 sp=(unsigned char *)OPENSSL_realloc(s, 160 (unsigned int)num+i*2); 161 if (sp == NULL) 162 { 163 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE); 164 if (s != NULL) OPENSSL_free(s); 165 goto err; 166 } 167 s=sp; 168 slen=num+i*2; 169 } 170 for (j=0; j<i; j++,k+=2) 171 { 172 for (n=0; n<2; n++) 173 { 174 m=bufp[k+n]; 175 if ((m >= '0') && (m <= '9')) 176 m-='0'; 177 else if ((m >= 'a') && (m <= 'f')) 178 m=m-'a'+10; 179 else if ((m >= 'A') && (m <= 'F')) 180 m=m-'A'+10; 181 else 182 { 183 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ASN1_R_NON_HEX_CHARACTERS); 184 goto err; 185 } 186 s[num+j]<<=4; 187 s[num+j]|=m; 188 } 189 } 190 num+=i; 191 if (again) 192 bufsize=BIO_gets(bp,buf,size); 193 else 194 break; 195 } 196 bs->length=num; 197 bs->data=s; 198 ret=1; 199 err: 200 if (0) 201 { 202 err_sl: 203 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ASN1_R_SHORT_LINE); 204 } 205 return(ret); 206 } 207 208