static asn1_error_code
asn1_encode_integer_internal(asn1buf *buf, asn1_intmax val,
unsigned int *retlen)
{
asn1_error_code retval;
unsigned int length = 0;
long valcopy;
int digit;
valcopy = val;
do {
digit = (int) (valcopy&0xFF);
retval = asn1buf_insert_octet(buf,(asn1_octet) digit);
if (retval) return retval;
length++;
valcopy = valcopy >> 8;
} while (valcopy != 0 && valcopy != ~0);
if ((val > 0) && ((digit&0x80) == 0x80)) { /* make sure the high bit is */
retval = asn1buf_insert_octet(buf,0); /* of the proper signed-ness */
if (retval) return retval;
length++;
} else if ((val < 0) && ((digit&0x80) != 0x80)) {
retval = asn1buf_insert_octet(buf,0xFF);
if (retval) return retval;
length++;
}
*retlen = length;
return 0;
}
asn1_error_code
k5_asn1_encode_uint(asn1buf *buf, uintmax_t val, size_t *len_out)
{
asn1_error_code ret;
size_t len = 0;
uintmax_t valcopy;
int digit;
valcopy = val;
do {
digit = valcopy & 0xFF;
ret = asn1buf_insert_octet(buf, digit);
if (ret)
return ret;
len++;
valcopy = valcopy >> 8;
} while (valcopy != 0);
if (digit & 0x80) { /* make sure the high bit is */
ret = asn1buf_insert_octet(buf, 0); /* of the proper signed-ness */
if (ret)
return ret;
len++;
}
*len_out = len;
return 0;
}
asn1_error_code
k5_asn1_encode_int(asn1buf *buf, asn1_intmax val, size_t *len_out)
{
asn1_error_code ret;
size_t len = 0;
long valcopy;
int digit;
valcopy = val;
do {
digit = valcopy & 0xFF;
ret = asn1buf_insert_octet(buf, digit);
if (ret)
return ret;
len++;
valcopy = valcopy >> 8;
} while (valcopy != 0 && valcopy != ~0);
if (val > 0 && (digit & 0x80) == 0x80) { /* make sure the high bit is */
ret = asn1buf_insert_octet(buf, 0); /* of the proper signed-ness */
if (ret)
return ret;
len++;
} else if (val < 0 && (digit & 0x80) != 0x80) {
ret = asn1buf_insert_octet(buf, 0xFF);
if (ret)
return ret;
len++;
}
*len_out = len;
return 0;
}
asn1_error_code
asn1_encode_unsigned_integer(asn1buf *buf, asn1_uintmax val,
unsigned int *retlen)
{
asn1_error_code retval;
unsigned int length = 0;
unsigned int partlen;
unsigned long valcopy;
int digit;
valcopy = val;
do {
digit = (int) (valcopy&0xFF);
retval = asn1buf_insert_octet(buf,(asn1_octet) digit);
if (retval) return retval;
length++;
valcopy = valcopy >> 8;
} while (valcopy != 0);
if (digit&0x80) { /* make sure the high bit is */
retval = asn1buf_insert_octet(buf,0); /* of the proper signed-ness */
if (retval) return retval;
length++;
}
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_INTEGER,length, &partlen);
if (retval) return retval;
length += partlen;
*retlen = length;
return 0;
}
asn1_error_code
asn1_make_id(asn1buf *buf, asn1_class asn1class,
asn1_construction construction, asn1_tagnum tagnum,
unsigned int *retlen)
{
asn1_error_code retval;
if (tagnum < 31) {
retval = asn1buf_insert_octet(buf, (asn1_octet) (asn1class | construction |
(asn1_octet)tagnum));
if (retval) return retval;
*retlen = 1;
} else {
asn1_tagnum tagcopy = tagnum;
int length = 0;
retval = asn1buf_insert_octet(buf, (asn1_octet)(tagcopy&0x7F));
if (retval) return retval;
tagcopy >>= 7;
length++;
for (; tagcopy != 0; tagcopy >>= 7) {
retval = asn1buf_insert_octet(buf, (asn1_octet) (0x80 | (asn1_octet)(tagcopy&0x7F)));
if (retval) return retval;
length++;
}
retval = asn1buf_insert_octet(buf, (asn1_octet) (asn1class | construction | 0x1F));
if (retval) return retval;
length++;
*retlen = length;
}
return 0;
}
asn1_error_code
asn1_make_length(asn1buf *buf, const unsigned int in_len, unsigned int *retlen)
{
asn1_error_code retval;
if (in_len < 128) {
retval = asn1buf_insert_octet(buf, (asn1_octet)(in_len&0x7F));
if (retval) return retval;
*retlen = 1;
} else {
int in_copy=in_len, length=0;
while (in_copy != 0) {
retval = asn1buf_insert_octet(buf, (asn1_octet)(in_copy&0xFF));
if (retval) return retval;
in_copy = in_copy >> 8;
length++;
}
retval = asn1buf_insert_octet(buf, (asn1_octet) (0x80 | (asn1_octet)(length&0x7F)));
if (retval) return retval;
length++;
*retlen = length;
}
return 0;
}
asn1_error_code asn1_encode_null(asn1buf *buf, int *retlen)
{
asn1_error_code retval;
retval = asn1buf_insert_octet(buf,0x00);
if (retval) return retval;
retval = asn1buf_insert_octet(buf,0x05);
if (retval) return retval;
*retlen = 2;
return 0;
}
asn1_error_code
k5_asn1_encode_bool(asn1buf *buf, intmax_t val, size_t *len_out)
{
asn1_octet bval = val ? 0xFF : 0x00;
*len_out = 1;
return asn1buf_insert_octet(buf, bval);
}
asn1_error_code
k5_asn1_encode_bitstring(asn1buf *buf, unsigned char *const *val, size_t len,
size_t *len_out)
{
asn1_error_code ret;
ret = asn1buf_insert_octetstring(buf, len, *val);
if (ret)
return ret;
*len_out = len + 1;
return asn1buf_insert_octet(buf, '\0');
}
asn1_error_code asn1_encode_krb5_flags(asn1buf *buf, const krb5_flags val, unsigned int *retlen)
{
asn1_setup();
krb5_flags valcopy = val;
int i;
for(i=0; i<4; i++){
retval = asn1buf_insert_octet(buf,(asn1_octet) (valcopy&0xFF));
if(retval) return retval;
valcopy >>= 8;
}
retval = asn1buf_insert_octet(buf,0); /* 0 padding bits */
if(retval) return retval;
sum = 5;
retval = asn1_make_tag(buf,UNIVERSAL,PRIMITIVE,ASN1_BITSTRING,sum,
&length);
if(retval) return retval;
sum += length;
*retlen = sum;
return 0;
}
asn1_error_code
asn1_encode_bitstring(asn1buf *buf, unsigned int len, const void *val,
unsigned int *retlen)
{
asn1_error_code retval;
unsigned int length;
retval = asn1buf_insert_octetstring(buf, len, val);
if (retval) return retval;
retval = asn1buf_insert_octet(buf, 0);
if (retval) return retval;
retval = asn1_make_tag(buf, UNIVERSAL, PRIMITIVE, ASN1_BITSTRING,
len+1, &length);
if (retval) return retval;
*retlen = len + 1 + length;
return 0;
}
asn1_error_code
asn1_encode_boolean(asn1buf *buf, asn1_intmax val, unsigned int *retlen)
{
asn1_error_code retval;
unsigned int length = 0;
unsigned int partlen = 1;
asn1_octet bval;
bval = val ? 0xFF : 0x00;
retval = asn1buf_insert_octet(buf, bval);
if (retval) return retval;
length = partlen;
retval = asn1_make_tag(buf, UNIVERSAL, PRIMITIVE, ASN1_BOOLEAN, length, &partlen);
if (retval) return retval;
length += partlen;
*retlen = length;
return 0;
}
/* Encode a DER tag into buf with the tag parameters in t and the content
* length len. Place the length of the encoded tag in *retlen. */
static asn1_error_code
make_tag(asn1buf *buf, const taginfo *t, size_t len, size_t *retlen)
{
asn1_error_code ret;
asn1_tagnum tag_copy;
size_t sum = 0, length, len_copy;
if (t->tagnum > ASN1_TAGNUM_MAX)
return ASN1_OVERFLOW;
/* Encode the length of the content within the tag. */
if (len < 128) {
ret = asn1buf_insert_octet(buf, len & 0x7F);
if (ret)
return ret;
length = 1;
} else {
length = 0;
for (len_copy = len; len_copy != 0; len_copy >>= 8) {
ret = asn1buf_insert_octet(buf, len_copy & 0xFF);
if (ret)
return ret;
length++;
}
ret = asn1buf_insert_octet(buf, 0x80 | (length & 0x7F));
if (ret)
return ret;
length++;
}
sum += length;
/* Encode the tag and construction bit. */
if (t->tagnum < 31) {
ret = asn1buf_insert_octet(buf,
t->asn1class | t->construction | t->tagnum);
if (ret)
return ret;
length = 1;
} else {
tag_copy = t->tagnum;
length = 0;
ret = asn1buf_insert_octet(buf, tag_copy & 0x7F);
if (ret)
return ret;
tag_copy >>= 7;
length++;
for (; tag_copy != 0; tag_copy >>= 7) {
ret = asn1buf_insert_octet(buf, 0x80 | (tag_copy & 0x7F));
if (ret)
return ret;
length++;
}
ret = asn1buf_insert_octet(buf, t->asn1class | t->construction | 0x1F);
if (ret)
return ret;
length++;
}
sum += length;
*retlen = sum;
return 0;
}
