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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*/
#include "tomcrypt_private.h"
#include <stdarg.h>
/**
@file der_decode_sequence_multi.c
ASN.1 DER, decode a SEQUENCE, Tom St Denis
*/
#ifdef LTC_DER
/**
Decode a SEQUENCE type using a VA list
@param in Input buffer
@param inlen Length of input in octets
@param a1 Initialized argument list #1
@param a2 Initialized argument list #2 (copy of #1)
@param flags c.f. enum ltc_der_seq
@return CRYPT_OK on success
*/
static int _der_decode_sequence_va(const unsigned char *in, unsigned long inlen, va_list a1, va_list a2, unsigned int flags)
{
int err;
ltc_asn1_type type;
unsigned long size, x;
void *data;
ltc_asn1_list *list;
LTC_ARGCHK(in != NULL);
/* get size of output that will be required */
x = 0;
for (;;) {
type = (ltc_asn1_type)va_arg(a1, int);
size = va_arg(a1, unsigned long);
data = va_arg(a1, void*);
LTC_UNUSED_PARAM(size);
LTC_UNUSED_PARAM(data);
if (type == LTC_ASN1_EOL) {
break;
}
switch (type) {
case LTC_ASN1_BOOLEAN:
case LTC_ASN1_INTEGER:
case LTC_ASN1_SHORT_INTEGER:
case LTC_ASN1_BIT_STRING:
case LTC_ASN1_OCTET_STRING:
case LTC_ASN1_NULL:
case LTC_ASN1_OBJECT_IDENTIFIER:
case LTC_ASN1_IA5_STRING:
case LTC_ASN1_PRINTABLE_STRING:
case LTC_ASN1_UTF8_STRING:
case LTC_ASN1_UTCTIME:
case LTC_ASN1_SET:
case LTC_ASN1_SETOF:
case LTC_ASN1_SEQUENCE:
case LTC_ASN1_CHOICE:
case LTC_ASN1_RAW_BIT_STRING:
case LTC_ASN1_TELETEX_STRING:
case LTC_ASN1_GENERALIZEDTIME:
++x;
break;
case LTC_ASN1_EOL:
case LTC_ASN1_CUSTOM_TYPE:
return CRYPT_INVALID_ARG;
}
}
/* allocate structure for x elements */
if (x == 0) {
return CRYPT_NOP;
}
list = XCALLOC(sizeof(*list), x);
if (list == NULL) {
return CRYPT_MEM;
}
/* fill in the structure */
x = 0;
for (;;) {
type = (ltc_asn1_type)va_arg(a2, int);
size = va_arg(a2, unsigned long);
data = va_arg(a2, void*);
if (type == LTC_ASN1_EOL) {
break;
}
switch (type) {
case LTC_ASN1_BOOLEAN:
case LTC_ASN1_INTEGER:
case LTC_ASN1_SHORT_INTEGER:
case LTC_ASN1_BIT_STRING:
case LTC_ASN1_OCTET_STRING:
case LTC_ASN1_NULL:
case LTC_ASN1_OBJECT_IDENTIFIER:
case LTC_ASN1_IA5_STRING:
case LTC_ASN1_PRINTABLE_STRING:
case LTC_ASN1_UTF8_STRING:
case LTC_ASN1_UTCTIME:
case LTC_ASN1_SEQUENCE:
case LTC_ASN1_SET:
case LTC_ASN1_SETOF:
case LTC_ASN1_CHOICE:
case LTC_ASN1_RAW_BIT_STRING:
case LTC_ASN1_TELETEX_STRING:
case LTC_ASN1_GENERALIZEDTIME:
LTC_SET_ASN1(list, x++, type, data, size);
break;
/* coverity[dead_error_line] */
case LTC_ASN1_EOL:
case LTC_ASN1_CUSTOM_TYPE:
break;
}
}
err = der_decode_sequence_ex(in, inlen, list, x, flags);
XFREE(list);
return err;
}
/**
Decode a SEQUENCE type using a VA list
@param in Input buffer
@param inlen Length of input in octets
@remark <...> is of the form <type, size, data> (int, unsigned long, void*)
@return CRYPT_OK on success
*/
int der_decode_sequence_multi(const unsigned char *in, unsigned long inlen, ...)
{
va_list a1, a2;
int err;
LTC_ARGCHK(in != NULL);
va_start(a1, inlen);
va_start(a2, inlen);
err = _der_decode_sequence_va(in, inlen, a1, a2, LTC_DER_SEQ_SEQUENCE | LTC_DER_SEQ_RELAXED);
va_end(a2);
va_end(a1);
return err;
}
/**
Decode a SEQUENCE type using a VA list
@param in Input buffer
@param inlen Length of input in octets
@param flags c.f. enum ltc_der_seq
@remark <...> is of the form <type, size, data> (int, unsigned long, void*)
@return CRYPT_OK on success
*/
int der_decode_sequence_multi_ex(const unsigned char *in, unsigned long inlen, unsigned int flags, ...)
{
va_list a1, a2;
int err;
LTC_ARGCHK(in != NULL);
va_start(a1, flags);
va_start(a2, flags);
err = _der_decode_sequence_va(in, inlen, a1, a2, flags);
va_end(a2);
va_end(a1);
return err;
}
#endif
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
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