/* crypto/asn1/asn1_par.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdio.h> #include "cryptlib.h" #include <openssl/buffer.h> #include <openssl/objects.h> #include <openssl/asn1.h> static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed, int indent); static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, int depth, int indent, int dump); static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed, int indent) { static const char fmt[]="%-18s"; static const char fmt2[]="%2d %-15s"; char str[128]; const char *p,*p2=NULL; if (constructed & V_ASN1_CONSTRUCTED) p="cons: "; else p="prim: "; if (BIO_write(bp,p,6) < 6) goto err; BIO_indent(bp,indent,128); p=str; if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag); else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) BIO_snprintf(str,sizeof str,"cont [ %d ]",tag); else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) BIO_snprintf(str,sizeof str,"appl [ %d ]",tag); else if (tag > 30) BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag); else p = ASN1_tag2str(tag); if (p2 != NULL) { if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err; } else { if (BIO_printf(bp,fmt,p) <= 0) goto err; } return(1); err: return(0); } int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent) { return(asn1_parse2(bp,&pp,len,0,0,indent,0)); } int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump) { return(asn1_parse2(bp,&pp,len,0,0,indent,dump)); } static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, int depth, int indent, int dump) { const unsigned char *p,*ep,*tot,*op,*opp; long len; int tag,xclass,ret=0; int nl,hl,j,r; ASN1_OBJECT *o=NULL; ASN1_OCTET_STRING *os=NULL; /* ASN1_BMPSTRING *bmp=NULL;*/ int dump_indent; #if 0 dump_indent = indent; #else dump_indent = 6; /* Because we know BIO_dump_indent() */ #endif p= *pp; tot=p+length; op=p-1; while ((p < tot) && (op < p)) { op=p; j=ASN1_get_object(&p,&len,&tag,&xclass,length); #ifdef LINT j=j; #endif if (j & 0x80) { if (BIO_write(bp,"Error in encoding\n",18) <= 0) goto end; ret=0; goto end; } hl=(p-op); length-=hl; /* if j == 0x21 it is a constructed indefinite length object */ if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) <= 0) goto end; if (j != (V_ASN1_CONSTRUCTED | 1)) { if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", depth,(long)hl,len) <= 0) goto end; } else { if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", depth,(long)hl) <= 0) goto end; } if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) goto end; if (j & V_ASN1_CONSTRUCTED) { ep=p+len; if (BIO_write(bp,"\n",1) <= 0) goto end; if (len > length) { BIO_printf(bp, "length is greater than %ld\n",length); ret=0; goto end; } if ((j == 0x21) && (len == 0)) { for (;;) { r=asn1_parse2(bp,&p,(long)(tot-p), offset+(p - *pp),depth+1, indent,dump); if (r == 0) { ret=0; goto end; } if ((r == 2) || (p >= tot)) break; } } else while (p < ep) { r=asn1_parse2(bp,&p,(long)len, offset+(p - *pp),depth+1, indent,dump); if (r == 0) { ret=0; goto end; } } } else if (xclass != 0) { p+=len; if (BIO_write(bp,"\n",1) <= 0) goto end; } else { nl=0; if ( (tag == V_ASN1_PRINTABLESTRING) || (tag == V_ASN1_T61STRING) || (tag == V_ASN1_IA5STRING) || (tag == V_ASN1_VISIBLESTRING) || (tag == V_ASN1_NUMERICSTRING) || (tag == V_ASN1_UTF8STRING) || (tag == V_ASN1_UTCTIME) || (tag == V_ASN1_GENERALIZEDTIME)) { if (BIO_write(bp,":",1) <= 0) goto end; if ((len > 0) && BIO_write(bp,(const char *)p,(int)len) != (int)len) goto end; } else if (tag == V_ASN1_OBJECT) { opp=op; if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) { if (BIO_write(bp,":",1) <= 0) goto end; i2a_ASN1_OBJECT(bp,o); } else { if (BIO_write(bp,":BAD OBJECT",11) <= 0) goto end; } } else if (tag == V_ASN1_BOOLEAN) { int ii; opp=op; ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); if (ii < 0) { if (BIO_write(bp,"Bad boolean\n",12) <= 0) goto end; } BIO_printf(bp,":%d",ii); } else if (tag == V_ASN1_BMPSTRING) { /* do the BMP thang */ } else if (tag == V_ASN1_OCTET_STRING) { int i,printable=1; opp=op; os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); if (os != NULL && os->length > 0) { opp = os->data; /* testing whether the octet string is * printable */ for (i=0; i<os->length; i++) { if (( (opp[i] < ' ') && (opp[i] != '\n') && (opp[i] != '\r') && (opp[i] != '\t')) || (opp[i] > '~')) { printable=0; break; } } if (printable) /* printable string */ { if (BIO_write(bp,":",1) <= 0) goto end; if (BIO_write(bp,(const char *)opp, os->length) <= 0) goto end; } else if (!dump) /* not printable => print octet string * as hex dump */ { if (BIO_write(bp,"[HEX DUMP]:",11) <= 0) goto end; for (i=0; i<os->length; i++) { if (BIO_printf(bp,"%02X" , opp[i]) <= 0) goto end; } } else /* print the normal dump */ { if (!nl) { if (BIO_write(bp,"\n",1) <= 0) goto end; } if (BIO_dump_indent(bp, (const char *)opp, ((dump == -1 || dump > os->length)?os->length:dump), dump_indent) <= 0) goto end; nl=1; } } if (os != NULL) { M_ASN1_OCTET_STRING_free(os); os=NULL; } } else if (tag == V_ASN1_INTEGER) { ASN1_INTEGER *bs; int i; opp=op; bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); if (bs != NULL) { if (BIO_write(bp,":",1) <= 0) goto end; if (bs->type == V_ASN1_NEG_INTEGER) if (BIO_write(bp,"-",1) <= 0) goto end; for (i=0; i<bs->length; i++) { if (BIO_printf(bp,"%02X", bs->data[i]) <= 0) goto end; } if (bs->length == 0) { if (BIO_write(bp,"00",2) <= 0) goto end; } } else { if (BIO_write(bp,"BAD INTEGER",11) <= 0) goto end; } M_ASN1_INTEGER_free(bs); } else if (tag == V_ASN1_ENUMERATED) { ASN1_ENUMERATED *bs; int i; opp=op; bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); if (bs != NULL) { if (BIO_write(bp,":",1) <= 0) goto end; if (bs->type == V_ASN1_NEG_ENUMERATED) if (BIO_write(bp,"-",1) <= 0) goto end; for (i=0; i<bs->length; i++) { if (BIO_printf(bp,"%02X", bs->data[i]) <= 0) goto end; } if (bs->length == 0) { if (BIO_write(bp,"00",2) <= 0) goto end; } } else { if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) goto end; } M_ASN1_ENUMERATED_free(bs); } else if (len > 0 && dump) { if (!nl) { if (BIO_write(bp,"\n",1) <= 0) goto end; } if (BIO_dump_indent(bp,(const char *)p, ((dump == -1 || dump > len)?len:dump), dump_indent) <= 0) goto end; nl=1; } if (!nl) { if (BIO_write(bp,"\n",1) <= 0) goto end; } p+=len; if ((tag == V_ASN1_EOC) && (xclass == 0)) { ret=2; /* End of sequence */ goto end; } } length-=len; } ret=1; end: if (o != NULL) ASN1_OBJECT_free(o); if (os != NULL) M_ASN1_OCTET_STRING_free(os); *pp=p; return(ret); } const char *ASN1_tag2str(int tag) { static const char *tag2str[] = { "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ }; if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) tag &= ~0x100; if(tag < 0 || tag > 30) return "(unknown)"; return tag2str[tag]; }