summaryrefslogtreecommitdiff
path: root/src/ltc/pk/asn1/der/sequence/der_decode_sequence_ex.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/ltc/pk/asn1/der/sequence/der_decode_sequence_ex.c')
-rw-r--r--src/ltc/pk/asn1/der/sequence/der_decode_sequence_ex.c310
1 files changed, 3 insertions, 307 deletions
diff --git a/src/ltc/pk/asn1/der/sequence/der_decode_sequence_ex.c b/src/ltc/pk/asn1/der/sequence/der_decode_sequence_ex.c
index b1473819..10cfd218 100644
--- a/src/ltc/pk/asn1/der/sequence/der_decode_sequence_ex.c
+++ b/src/ltc/pk/asn1/der/sequence/der_decode_sequence_ex.c
@@ -22,317 +22,13 @@
@param inlen The size of the input
@param list The list of items to decode
@param outlen The number of items in the list
- @param ordered Search an unordeded or ordered list
+ @param flags c.f. enum ltc_der_seq
@return CRYPT_OK on success
*/
int der_decode_sequence_ex(const unsigned char *in, unsigned long inlen,
- ltc_asn1_list *list, unsigned long outlen, int ordered)
+ ltc_asn1_list *list, unsigned long outlen, unsigned int flags)
{
- int err, i;
- ltc_asn1_type type;
- unsigned long size, x, y, z, blksize;
- void *data;
-
- LTC_ARGCHK(in != NULL);
- LTC_ARGCHK(list != NULL);
-
- /* get blk size */
- if (inlen < 2) {
- return CRYPT_INVALID_PACKET;
- }
-
- /* sequence type? We allow 0x30 SEQUENCE and 0x31 SET since fundamentally they're the same structure */
- x = 0;
- if (in[x] != 0x30 && in[x] != 0x31) {
- return CRYPT_INVALID_PACKET;
- }
- ++x;
-
- /* check if the msb is set, which signals that the
- * 7 lsb bits represent the number of bytes of the length
- */
- if (in[x] < 128) {
- blksize = in[x++];
- } else {
- if (in[x] < 0x81 || in[x] > 0x83) {
- return CRYPT_INVALID_PACKET;
- }
- y = in[x++] & 0x7F;
-
- /* would reading the len bytes overrun? */
- if (x + y > inlen) {
- return CRYPT_INVALID_PACKET;
- }
-
- /* read len */
- blksize = 0;
- while (y--) {
- blksize = (blksize << 8) | (unsigned long)in[x++];
- }
- }
-
- /* would this blksize overflow? */
- if (x + blksize > inlen) {
- return CRYPT_INVALID_PACKET;
- }
-
- /* mark all as unused */
- for (i = 0; i < (int)outlen; i++) {
- list[i].used = 0;
- }
-
- /* ok read data */
- inlen = blksize;
- for (i = 0; i < (int)outlen; i++) {
- z = 0;
- type = list[i].type;
- size = list[i].size;
- data = list[i].data;
- if (!ordered && list[i].used == 1) { continue; }
-
- if (type == LTC_ASN1_EOL) {
- break;
- }
-
- /* handle context specific tags - just skip the tag + len bytes */
- z = 0;
- if (list[i].tag > 0 && list[i].tag == in[x + z++]) {
- if (in[x+z] & 0x80) {
- y = in[x + z++] & 0x7F;
- if (y == 0 || y > 2) { return CRYPT_INVALID_PACKET; }
- z += y;
- } else {
- z++;
- }
- x += z;
- inlen -= z;
- }
-
- switch (type) {
- case LTC_ASN1_BOOLEAN:
- z = inlen;
- if ((err = der_decode_boolean(in + x, z, ((int *)data))) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- if ((err = der_length_boolean(&z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_INTEGER:
- z = inlen;
- if ((err = der_decode_integer(in + x, z, data)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- if ((err = der_length_integer(data, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_SHORT_INTEGER:
- z = inlen;
- if ((err = der_decode_short_integer(in + x, z, data)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- if ((err = der_length_short_integer(((unsigned long*)data)[0], &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
-
- break;
-
- case LTC_ASN1_BIT_STRING:
- z = inlen;
- if ((err = der_decode_bit_string(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_bit_string(size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_RAW_BIT_STRING:
- z = inlen;
- if ((err = der_decode_raw_bit_string(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_bit_string(size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_OCTET_STRING:
- z = inlen;
- if ((err = der_decode_octet_string(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_octet_string(size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_NULL:
- if (inlen < 2 || in[x] != 0x05 || in[x+1] != 0x00) {
- if (!ordered || list[i].optional) { continue; }
- err = CRYPT_INVALID_PACKET;
- goto LBL_ERR;
- }
- z = 2;
- break;
-
- case LTC_ASN1_OBJECT_IDENTIFIER:
- z = inlen;
- if ((err = der_decode_object_identifier(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_object_identifier(data, size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_TELETEX_STRING:
- z = inlen;
- if ((err = der_decode_teletex_string(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_teletex_string(data, size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_IA5_STRING:
- z = inlen;
- if ((err = der_decode_ia5_string(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_ia5_string(data, size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
-
- case LTC_ASN1_PRINTABLE_STRING:
- z = inlen;
- if ((err = der_decode_printable_string(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_printable_string(data, size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_UTF8_STRING:
- z = inlen;
- if ((err = der_decode_utf8_string(in + x, z, data, &size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- list[i].size = size;
- if ((err = der_length_utf8_string(data, size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_UTCTIME:
- z = inlen;
- if ((err = der_decode_utctime(in + x, &z, data)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_GENERALIZEDTIME:
- z = inlen;
- if ((err = der_decode_generalizedtime(in + x, &z, data)) != CRYPT_OK) {
- if (!ordered) { continue; }
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_SET:
- z = inlen;
- if ((err = der_decode_set(in + x, z, data, size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- if ((err = der_length_sequence(data, size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_SETOF:
- case LTC_ASN1_SEQUENCE:
- /* detect if we have the right type */
- if ((type == LTC_ASN1_SETOF && (in[x] & 0x3F) != 0x31) || (type == LTC_ASN1_SEQUENCE && (in[x] & 0x3F) != 0x30)) {
- err = CRYPT_INVALID_PACKET;
- goto LBL_ERR;
- }
-
- z = inlen;
- if ((err = der_decode_sequence(in + x, z, data, size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- if ((err = der_length_sequence(data, size, &z)) != CRYPT_OK) {
- goto LBL_ERR;
- }
- break;
-
-
- case LTC_ASN1_CHOICE:
- z = inlen;
- if ((err = der_decode_choice(in + x, &z, data, size)) != CRYPT_OK) {
- if (!ordered || list[i].optional) { continue; }
- goto LBL_ERR;
- }
- break;
-
- case LTC_ASN1_CONSTRUCTED:
- case LTC_ASN1_CONTEXT_SPECIFIC:
- case LTC_ASN1_EOL:
- err = CRYPT_INVALID_ARG;
- goto LBL_ERR;
- }
- x += z;
- inlen -= z;
- list[i].used = 1;
- if (!ordered) {
- /* restart the decoder */
- i = -1;
- }
- }
-
- for (i = 0; i < (int)outlen; i++) {
- if (list[i].used == 0 && list[i].optional == 0) {
- err = CRYPT_INVALID_PACKET;
- goto LBL_ERR;
- }
- }
-
- if (inlen == 0) {
- err = CRYPT_OK;
- } else {
- err = CRYPT_INPUT_TOO_LONG;
- }
-
-LBL_ERR:
- return err;
+ return der_decode_custom_type_ex(in, inlen, NULL, list, outlen, flags);
}
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 17:23:43 +0000