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Diffstat (limited to 'crypto/asn1/asn1_lib.c')
| -rw-r--r-- | crypto/asn1/asn1_lib.c | 433 |
1 files changed, 433 insertions, 0 deletions
diff --git a/crypto/asn1/asn1_lib.c b/crypto/asn1/asn1_lib.c new file mode 100644 index 0000000000..bdd706bcf1 --- /dev/null +++ b/crypto/asn1/asn1_lib.c @@ -0,0 +1,433 @@ +/* crypto/asn1/asn1_lib.c */ +/* Copyright (C) 1995-1997 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 "asn1.h" +#include "asn1_mac.h" + +#ifndef NOPROTO +static int asn1_get_length(unsigned char **pp,int *inf,long *rl,int max); +static void asn1_put_length(unsigned char **pp, int length); +#else +static int asn1_get_length(); +static void asn1_put_length(); +#endif + +char *ASN1_version="ASN1 part of SSLeay 0.8.1b 29-Jun-1998"; + +int ASN1_check_infinite_end(p,len) +unsigned char **p; +long len; + { + /* If there is 0 or 1 byte left, the length check should pick + * things up */ + if (len <= 0) + return(1); + else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) + { + (*p)+=2; + return(1); + } + return(0); + } + + +int ASN1_get_object(pp, plength, ptag, pclass, omax) +unsigned char **pp; +long *plength; +int *ptag; +int *pclass; +long omax; + { + int i,ret; + long l; + unsigned char *p= *pp; + int tag,xclass,inf; + long max=omax; + + if (!max) goto err; + ret=(*p&V_ASN1_CONSTRUCTED); + xclass=(*p&V_ASN1_PRIVATE); + i= *p&V_ASN1_PRIMATIVE_TAG; + if (i == V_ASN1_PRIMATIVE_TAG) + { /* high-tag */ + p++; + if (--max == 0) goto err; + l=0; + while (*p&0x80) + { + l<<=7L; + l|= *(p++)&0x7f; + if (--max == 0) goto err; + } + l<<=7L; + l|= *(p++)&0x7f; + tag=(int)l; + } + else + { + tag=i; + p++; + if (--max == 0) goto err; + } + *ptag=tag; + *pclass=xclass; + if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err; + +#ifdef undef + fprintf(stderr,"p=%d + *plength=%d > omax=%d + *pp=%d (%d > %d)\n", + p,*plength,omax,*pp,(p+ *plength),omax+ *pp); +#endif + + if ((p+ *plength) > (omax+ *pp)) + { + ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_TOO_LONG); + /* Set this so that even if things are not long enough + * the values are set correctly */ + ret|=0x80; + } + *pp=p; + return(ret+inf); +err: + ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_HEADER_TOO_LONG); + return(0x80); + } + +static int asn1_get_length(pp,inf,rl,max) +unsigned char **pp; +int *inf; +long *rl; +int max; + { + unsigned char *p= *pp; + long ret=0; + int i; + + if (max-- < 1) return(0); + if (*p == 0x80) + { + *inf=1; + ret=0; + p++; + } + else + { + *inf=0; + i= *p&0x7f; + if (*(p++) & 0x80) + { + if (max-- == 0) return(0); + while (i-- > 0) + { + ret<<=8L; + ret|= *(p++); + if (max-- == 0) return(0); + } + } + else + ret=i; + } + *pp=p; + *rl=ret; + return(1); + } + +/* class 0 is constructed + * constructed == 2 for indefinitle length constructed */ +void ASN1_put_object(pp,constructed,length,tag,xclass) +unsigned char **pp; +int constructed; +int length; +int tag; +int xclass; + { + unsigned char *p= *pp; + int i; + + i=(constructed)?V_ASN1_CONSTRUCTED:0; + i|=(xclass&V_ASN1_PRIVATE); + if (tag < 31) + *(p++)=i|(tag&V_ASN1_PRIMATIVE_TAG); + else + { + *(p++)=i|V_ASN1_PRIMATIVE_TAG; + while (tag > 0x7f) + { + *(p++)=(tag&0x7f)|0x80; + tag>>=7; + } + *(p++)=(tag&0x7f); + } + if ((constructed == 2) && (length == 0)) + *(p++)=0x80; /* der_put_length would output 0 instead */ + else + asn1_put_length(&p,length); + *pp=p; + } + +static void asn1_put_length(pp, length) +unsigned char **pp; +int length; + { + unsigned char *p= *pp; + int i,l; + if (length <= 127) + *(p++)=(unsigned char)length; + else + { + l=length; + for (i=0; l > 0; i++) + l>>=8; + *(p++)=i|0x80; + l=i; + while (i-- > 0) + { + p[i]=length&0xff; + length>>=8; + } + p+=l; + } + *pp=p; + } + +int ASN1_object_size(constructed, length, tag) +int constructed; +int length; +int tag; + { + int ret; + + ret=length; + ret++; + if (tag >= 31) + { + while (tag > 0) + { + tag>>=7; + ret++; + } + } + if ((length == 0) && (constructed == 2)) + ret+=2; + ret++; + if (length > 127) + { + while (length > 0) + { + length>>=8; + ret++; + } + } + return(ret); + } + +int asn1_Finish(c) +ASN1_CTX *c; + { + if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos)) + { + if (!ASN1_check_infinite_end(&c->p,c->slen)) + { + c->error=ASN1_R_MISSING_EOS; + return(0); + } + } + if ( ((c->slen != 0) && !(c->inf & 1)) || + ((c->slen < 0) && (c->inf & 1))) + { + c->error=ASN1_R_LENGTH_MISMATCH; + return(0); + } + return(1); + } + +int asn1_GetSequence(c,length) +ASN1_CTX *c; +long *length; + { + unsigned char *q; + + q=c->p; + c->inf=ASN1_get_object(&(c->p),&(c->slen),&(c->tag),&(c->xclass), + *length); + if (c->inf & 0x80) + { + c->error=ASN1_R_BAD_GET_OBJECT; + return(0); + } + if (c->tag != V_ASN1_SEQUENCE) + { + c->error=ASN1_R_EXPECTING_A_SEQUENCE; + return(0); + } + (*length)-=(c->p-q); + if (c->max && (*length < 0)) + { + c->error=ASN1_R_LENGTH_MISMATCH; + return(0); + } + if (c->inf == (1|V_ASN1_CONSTRUCTED)) + c->slen= *length+ *(c->pp)-c->p; + c->eos=0; + return(1); + } + +ASN1_STRING *ASN1_STRING_dup(str) +ASN1_STRING *str; + { + ASN1_STRING *ret; + + if (str == NULL) return(NULL); + if ((ret=ASN1_STRING_type_new(str->type)) == NULL) + return(NULL); + if (!ASN1_STRING_set(ret,str->data,str->length)) + { + ASN1_STRING_free(ret); + return(NULL); + } + return(ret); + } + +int ASN1_STRING_set(str,data,len) +ASN1_STRING *str; +unsigned char *data; +int len; + { + char *c; + + if (len < 0) + { + if (data == NULL) + return(0); + else + len=strlen((char *)data); + } + if ((str->length < len) || (str->data == NULL)) + { + c=(char *)str->data; + if (c == NULL) + str->data=(unsigned char *)Malloc(len+1); + else + str->data=(unsigned char *)Realloc(c,len+1); + + if (str->data == NULL) + { + str->data=(unsigned char *)c; + return(0); + } + } + str->length=len; + if (data != NULL) + { + memcpy(str->data,data,len); + /* an alowance for strings :-) */ + str->data[len]='\0'; + } + return(1); + } + +ASN1_STRING *ASN1_STRING_new() + { + return(ASN1_STRING_type_new(V_ASN1_OCTET_STRING)); + } + + +ASN1_STRING *ASN1_STRING_type_new(type) +int type; + { + ASN1_STRING *ret; + + ret=(ASN1_STRING *)Malloc(sizeof(ASN1_STRING)); + if (ret == NULL) + { + ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW,ERR_R_MALLOC_FAILURE); + return(NULL); + } + ret->length=0; + ret->type=type; + ret->data=NULL; + return(ret); + } + +void ASN1_STRING_free(a) +ASN1_STRING *a; + { + if (a == NULL) return; + if (a->data != NULL) Free((char *)a->data); + Free((char *)a); + } + +int ASN1_STRING_cmp(a,b) +ASN1_STRING *a,*b; + { + int i; + + i=(a->length-b->length); + if (i == 0) + { + i=memcmp(a->data,b->data,a->length); + if (i == 0) + return(a->type-b->type); + else + return(i); + } + else + return(i); + } + |