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Trap an invalid ASN1_ITEM construction and print out

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the errant field for more ASN1 error conditions.
This commit is contained in:
Dr. Stephen Henson 2001-02-25 14:11:31 +00:00
parent f196522159
commit b31cc2d9f7
3 changed files with 16 additions and 4 deletions
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1
crypto/asn1/asn1.h
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@ -1083,6 +1083,7 @@ int ASN1_item_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it);
#define ASN1_R_ILLEGAL_CHARACTERS 124
#define ASN1_R_ILLEGAL_NULL 125
#define ASN1_R_ILLEGAL_OPTIONAL_ANY 126
#define ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE 170
#define ASN1_R_ILLEGAL_TAGGED_ANY 127
#define ASN1_R_INTEGER_TOO_LARGE_FOR_LONG 128
#define ASN1_R_INVALID_BMPSTRING_LENGTH 129

1
crypto/asn1/asn1_err.c
View File

@ -172,6 +172,7 @@ static ERR_STRING_DATA ASN1_str_reasons[]=
{ASN1_R_ILLEGAL_CHARACTERS ,"illegal characters"},
{ASN1_R_ILLEGAL_NULL ,"illegal null"},
{ASN1_R_ILLEGAL_OPTIONAL_ANY ,"illegal optional any"},
{ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE ,"illegal options on item template"},
{ASN1_R_ILLEGAL_TAGGED_ANY ,"illegal tagged any"},
{ASN1_R_INTEGER_TOO_LARGE_FOR_LONG ,"integer too large for long"},
{ASN1_R_INVALID_BMPSTRING_LENGTH ,"invalid bmpstring length"},

18
crypto/asn1/tasn_dec.c
View File

@ -132,8 +132,18 @@ int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1
switch(it->itype) {
case ASN1_ITYPE_PRIMITIVE:
if(it->templates)
if(it->templates) {
/* tagging or OPTIONAL is currently illegal on an item template
* because the flags can't get passed down. In practice this isn't
* a problem: we include the relevant flags from the item template
* in the template itself.
*/
if ((tag != -1) || opt) {
ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE);
goto err;
}
return asn1_template_ex_d2i(pval, in, len, it->templates, opt, ctx);
}
return asn1_d2i_ex_primitive(pval, in, len, it, tag, aclass, opt, ctx);
break;
@ -232,21 +242,21 @@ int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1
/* Otherwise must be an ASN1 parsing error */
errtt = tt;
ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
return 0;
goto err;
}
/* Did we fall off the end without reading anything? */
if(i == it->tcount) {
/* If OPTIONAL, this is OK */
if(opt) return -1;
ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_NO_MATCHING_CHOICE_TYPE);
return 0;
goto err;
}
/* Otherwise we got a match, allocate structure and populate it */
if(!*pval) {
if(!ASN1_item_ex_new(pval, it)) {
errtt = tt;
ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
return 0;
goto err;
}
}
pchptr = asn1_get_field_ptr(pval, tt);