| // SPDX-License-Identifier: BSD-2-Clause |
| /* 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: |
| default: |
| 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: |
| default: |
| 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: $Format:%ai$ */ |