1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57 #include <openssl/asn1.h> 58 59 #include <openssl/err.h> 60 #include <openssl/mem.h> 61 62 63 64 int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type) 65 { 66 int i,n=0; 67 static const char *h="0123456789ABCDEF"; 68 char buf[2]; 69 70 if (a == NULL) return(0); 71 72 if (a->length == 0) 73 { 74 if (BIO_write(bp,"0",1) != 1) goto err; 75 n=1; 76 } 77 else 78 { 79 for (i=0; i<a->length; i++) 80 { 81 if ((i != 0) && (i%35 == 0)) 82 { 83 if (BIO_write(bp,"\\\n",2) != 2) goto err; 84 n+=2; 85 } 86 buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f]; 87 buf[1]=h[((unsigned char)a->data[i] )&0x0f]; 88 if (BIO_write(bp,buf,2) != 2) goto err; 89 n+=2; 90 } 91 } 92 return(n); 93 err: 94 return(-1); 95 } 96 97 int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size) 98 { 99 int ret=0; 100 int i,j,k,m,n,again,bufsize; 101 unsigned char *s=NULL,*sp; 102 unsigned char *bufp; 103 int num=0,slen=0,first=1; 104 105 bufsize=BIO_gets(bp,buf,size); 106 for (;;) 107 { 108 if (bufsize < 1) 109 { 110 if (first) 111 break; 112 else 113 goto err_sl; 114 } 115 first=0; 116 117 i=bufsize; 118 if (buf[i-1] == '\n') buf[--i]='\0'; 119 if (i == 0) goto err_sl; 120 if (buf[i-1] == '\r') buf[--i]='\0'; 121 if (i == 0) goto err_sl; 122 again=(buf[i-1] == '\\'); 123 124 for (j=i-1; j>0; j--) 125 { 126 if (!( ((buf[j] >= '0') && (buf[j] <= '9')) || 127 ((buf[j] >= 'a') && (buf[j] <= 'f')) || 128 ((buf[j] >= 'A') && (buf[j] <= 'F')))) 129 { 130 i=j; 131 break; 132 } 133 } 134 buf[i]='\0'; 135 /* We have now cleared all the crap off the end of the 136 * line */ 137 if (i < 2) goto err_sl; 138 139 bufp=(unsigned char *)buf; 140 141 k=0; 142 i-=again; 143 if (i%2 != 0) 144 { 145 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ODD_NUMBER_OF_CHARS); 146 goto err; 147 } 148 i/=2; 149 if (num+i > slen) 150 { 151 if (s == NULL) 152 sp=(unsigned char *)OPENSSL_malloc( 153 (unsigned int)num+i*2); 154 else 155 sp=(unsigned char *)OPENSSL_realloc(s, 156 (unsigned int)num+i*2); 157 if (sp == NULL) 158 { 159 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 160 goto err; 161 } 162 s=sp; 163 slen=num+i*2; 164 } 165 for (j=0; j<i; j++,k+=2) 166 { 167 for (n=0; n<2; n++) 168 { 169 m=bufp[k+n]; 170 if ((m >= '0') && (m <= '9')) 171 m-='0'; 172 else if ((m >= 'a') && (m <= 'f')) 173 m=m-'a'+10; 174 else if ((m >= 'A') && (m <= 'F')) 175 m=m-'A'+10; 176 else 177 { 178 OPENSSL_PUT_ERROR(ASN1, ASN1_R_NON_HEX_CHARACTERS); 179 goto err; 180 } 181 s[num+j]<<=4; 182 s[num+j]|=m; 183 } 184 } 185 num+=i; 186 if (again) 187 bufsize=BIO_gets(bp,buf,size); 188 else 189 break; 190 } 191 bs->length=num; 192 bs->data=s; 193 ret=1; 194 err: 195 if (0) 196 { 197 err_sl: 198 OPENSSL_PUT_ERROR(ASN1, ASN1_R_SHORT_LINE); 199 } 200 if (s != NULL) 201 OPENSSL_free(s); 202 return(ret); 203 } 204 205
