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change prototype for der_match_tag_and_length to return the Der_type, add BER decoder for octet string

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@24188 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2008-12-15 04:30:12 +00:00
parent e9d32a0ac5
commit 26d2cd604d
1 changed files with 71 additions and 6 deletions
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77
lib/asn1/der_get.c
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@@ -251,6 +251,70 @@ der_get_octet_string (const unsigned char *p, size_t len,
return 0;
}
int
der_get_octet_string_ber (const unsigned char *p, size_t len,
heim_octet_string *data, size_t *size)
{
int e;
Der_type type;
Der_class class;
unsigned int tag, depth = 0;
size_t l, datalen, oldlen = len;
data->length = 0;
data->data = NULL;
while (1) {
e = der_get_tag (p, len, &class, &type, &tag, &l);
if (e) goto out;
if (class != ASN1_C_UNIV) return ASN1_BAD_ID;
if (type == PRIM && tag == UT_EndOfContent) {
if (depth == 0)
break;
depth--;
}
if (tag != UT_OctetString) {
e = ASN1_BAD_ID;
goto out;
}
p += l;
len -= l;
e = der_get_length (p, len, &datalen, &l);
if (e) goto out;
p += l;
len -= l;
if (datalen > len)
return ASN1_OVERRUN;
if (type == PRIM) {
void *ptr;
ptr = realloc(data->data, data->length + datalen);
if (ptr == NULL) {
e = ENOMEM;
goto out;
}
data->data = ptr;
memcpy(((unsigned char *)data->data) + data->length, p, datalen);
data->length += datalen;
} else
depth++;
p += datalen;
len -= datalen;
}
if(size) *size = oldlen - len;
return 0;
out:
free(data->data);
data->data = NULL;
data->length = 0;
return e;
}
int
der_get_heim_integer (const unsigned char *p, size_t len,
heim_integer *data, size_t *size)
@@ -454,18 +518,17 @@ der_get_tag (const unsigned char *p, size_t len,
int
der_match_tag (const unsigned char *p, size_t len,
Der_class class, Der_type type,
unsigned int tag, size_t *size)
Der_class class, Der_type *type,
unsigned int tag, size_t *size)
{
size_t l;
Der_class thisclass;
Der_type thistype;
unsigned int thistag;
int e;
e = der_get_tag (p, len, &thisclass, &thistype, &thistag, &l);
e = der_get_tag (p, len, &thisclass, type, &thistag, &l);
if (e) return e;
if (class != thisclass || type != thistype)
if (class != thisclass)
return ASN1_BAD_ID;
if(tag > thistag)
return ASN1_MISPLACED_FIELD;
@@ -477,7 +540,7 @@ der_match_tag (const unsigned char *p, size_t len,
int
der_match_tag_and_length (const unsigned char *p, size_t len,
Der_class class, Der_type type, unsigned int tag,
Der_class class, Der_type *type, unsigned int tag,
size_t *length_ret, size_t *size)
{
size_t l, ret = 0;
@@ -497,6 +560,8 @@ der_match_tag_and_length (const unsigned char *p, size_t len,
return 0;
}
/*
* Old versions of DCE was based on a very early beta of the MIT code,
* which used MAVROS for ASN.1 encoding. MAVROS had the interesting