diff options
Diffstat (limited to 'openssl/crypto/asn1/asn1_lib.c')
| -rw-r--r-- | openssl/crypto/asn1/asn1_lib.c | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/asn1_lib.c b/openssl/crypto/asn1/asn1_lib.c new file mode 100644 index 000000000..5af559ef8 --- /dev/null +++ b/openssl/crypto/asn1/asn1_lib.c @@ -0,0 +1,470 @@ +/* crypto/asn1/asn1_lib.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 <limits.h> +#include "cryptlib.h" +#include <openssl/asn1.h> +#include <openssl/asn1_mac.h> + +static int asn1_get_length(const unsigned char **pp,int *inf,long *rl,int max); +static void asn1_put_length(unsigned char **pp, int length); +const char ASN1_version[]="ASN.1" OPENSSL_VERSION_PTEXT; + +static int _asn1_check_infinite_end(const 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_check_infinite_end(unsigned char **p, long len) + { + return _asn1_check_infinite_end((const unsigned char **)p, len); + } + +int ASN1_const_check_infinite_end(const unsigned char **p, long len) + { + return _asn1_check_infinite_end(p, len); + } + + +int ASN1_get_object(const unsigned char **pp, long *plength, int *ptag, + int *pclass, long omax) + { + int i,ret; + long l; + const 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_PRIMITIVE_TAG; + if (i == V_ASN1_PRIMITIVE_TAG) + { /* high-tag */ + p++; + if (--max == 0) goto err; + l=0; + while (*p&0x80) + { + l<<=7L; + l|= *(p++)&0x7f; + if (--max == 0) goto err; + if (l > (INT_MAX >> 7L)) goto err; + } + l<<=7L; + l|= *(p++)&0x7f; + tag=(int)l; + if (--max == 0) goto err; + } + else + { + tag=i; + p++; + if (--max == 0) goto err; + } + *ptag=tag; + *pclass=xclass; + if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err; + +#if 0 + fprintf(stderr,"p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n", + (int)p,*plength,omax,(int)*pp,(int)(p+ *plength), + (int)(omax+ *pp)); + +#endif + if (*plength > (omax - (p - *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(const unsigned char **pp, int *inf, long *rl, int max) + { + const unsigned char *p= *pp; + unsigned long ret=0; + unsigned 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 (i > sizeof(long)) + return 0; + if (max-- == 0) return(0); + while (i-- > 0) + { + ret<<=8L; + ret|= *(p++); + if (max-- == 0) return(0); + } + } + else + ret=i; + } + if (ret > LONG_MAX) + return 0; + *pp=p; + *rl=(long)ret; + return(1); + } + +/* class 0 is constructed + * constructed == 2 for indefinite length constructed */ +void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag, + int xclass) + { + unsigned char *p= *pp; + int i, ttag; + + i=(constructed)?V_ASN1_CONSTRUCTED:0; + i|=(xclass&V_ASN1_PRIVATE); + if (tag < 31) + *(p++)=i|(tag&V_ASN1_PRIMITIVE_TAG); + else + { + *(p++)=i|V_ASN1_PRIMITIVE_TAG; + for(i = 0, ttag = tag; ttag > 0; i++) ttag >>=7; + ttag = i; + while(i-- > 0) + { + p[i] = tag & 0x7f; + if(i != (ttag - 1)) p[i] |= 0x80; + tag >>= 7; + } + p += ttag; + } + if (constructed == 2) + *(p++)=0x80; + else + asn1_put_length(&p,length); + *pp=p; + } + +int ASN1_put_eoc(unsigned char **pp) + { + unsigned char *p = *pp; + *p++ = 0; + *p++ = 0; + *pp = p; + return 2; + } + +static void asn1_put_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(int constructed, int length, int tag) + { + int ret; + + ret=length; + ret++; + if (tag >= 31) + { + while (tag > 0) + { + tag>>=7; + ret++; + } + } + if (constructed == 2) + return ret + 3; + ret++; + if (length > 127) + { + while (length > 0) + { + length>>=8; + ret++; + } + } + return(ret); + } + +static int _asn1_Finish(ASN1_const_CTX *c) + { + if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos)) + { + if (!ASN1_const_check_infinite_end(&c->p,c->slen)) + { + c->error=ERR_R_MISSING_ASN1_EOS; + return(0); + } + } + if ( ((c->slen != 0) && !(c->inf & 1)) || + ((c->slen < 0) && (c->inf & 1))) + { + c->error=ERR_R_ASN1_LENGTH_MISMATCH; + return(0); + } + return(1); + } + +int asn1_Finish(ASN1_CTX *c) + { + return _asn1_Finish((ASN1_const_CTX *)c); + } + +int asn1_const_Finish(ASN1_const_CTX *c) + { + return _asn1_Finish(c); + } + +int asn1_GetSequence(ASN1_const_CTX *c, long *length) + { + const 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=ERR_R_BAD_GET_ASN1_OBJECT_CALL; + return(0); + } + if (c->tag != V_ASN1_SEQUENCE) + { + c->error=ERR_R_EXPECTING_AN_ASN1_SEQUENCE; + return(0); + } + (*length)-=(c->p-q); + if (c->max && (*length < 0)) + { + c->error=ERR_R_ASN1_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(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); + } + ret->flags = str->flags; + return(ret); + } + +int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len) + { + unsigned char *c; + const char *data=_data; + + if (len < 0) + { + if (data == NULL) + return(0); + else + len=strlen(data); + } + if ((str->length < len) || (str->data == NULL)) + { + c=str->data; + if (c == NULL) + str->data=OPENSSL_malloc(len+1); + else + str->data=OPENSSL_realloc(c,len+1); + + if (str->data == NULL) + { + ASN1err(ASN1_F_ASN1_STRING_SET,ERR_R_MALLOC_FAILURE); + str->data=c; + return(0); + } + } + str->length=len; + if (data != NULL) + { + memcpy(str->data,data,len); + /* an allowance for strings :-) */ + str->data[len]='\0'; + } + return(1); + } + +void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len) + { + if (str->data) + OPENSSL_free(str->data); + str->data = data; + str->length = len; + } + +ASN1_STRING *ASN1_STRING_new(void) + { + return(ASN1_STRING_type_new(V_ASN1_OCTET_STRING)); + } + + +ASN1_STRING *ASN1_STRING_type_new(int type) + { + ASN1_STRING *ret; + + ret=(ASN1_STRING *)OPENSSL_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; + ret->flags=0; + return(ret); + } + +void ASN1_STRING_free(ASN1_STRING *a) + { + if (a == NULL) return; + if (a->data != NULL) OPENSSL_free(a->data); + OPENSSL_free(a); + } + +int ASN1_STRING_cmp(ASN1_STRING *a, ASN1_STRING *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); + } + +void asn1_add_error(const unsigned char *address, int offset) + { + char buf1[DECIMAL_SIZE(address)+1],buf2[DECIMAL_SIZE(offset)+1]; + + BIO_snprintf(buf1,sizeof buf1,"%lu",(unsigned long)address); + BIO_snprintf(buf2,sizeof buf2,"%d",offset); + ERR_add_error_data(4,"address=",buf1," offset=",buf2); + } + +int ASN1_STRING_length(ASN1_STRING *x) +{ return M_ASN1_STRING_length(x); } + +void ASN1_STRING_length_set(ASN1_STRING *x, int len) +{ M_ASN1_STRING_length_set(x, len); return; } + +int ASN1_STRING_type(ASN1_STRING *x) +{ return M_ASN1_STRING_type(x); } + +unsigned char * ASN1_STRING_data(ASN1_STRING *x) +{ return M_ASN1_STRING_data(x); } |