| Ron Shacham | 0eba05c | 2020-05-08 15:13:19 -0400 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2004-2017 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | #ifndef ASN1_CONSTRAINTS_VALIDATOR_H |
| 6 | #define ASN1_CONSTRAINTS_VALIDATOR_H |
| 7 | |
| 8 | #include <asn_system.h> /* Platform-dependent types */ |
| 9 | |
| 10 | #ifdef __cplusplus |
| 11 | extern "C" { |
| 12 | #endif |
| 13 | |
| 14 | struct asn_TYPE_descriptor_s; /* Forward declaration */ |
| 15 | |
| 16 | /* |
| 17 | * Validate the structure according to the ASN.1 constraints. |
| 18 | * If errbuf and errlen are given, they shall be pointing to the appropriate |
| 19 | * buffer space and its length before calling this function. Alternatively, |
| 20 | * they could be passed as NULL's. If constraints validation fails, |
| 21 | * errlen will contain the actual number of bytes taken from the errbuf |
| 22 | * to encode an error message (properly 0-terminated). |
| 23 | * |
| 24 | * RETURN VALUES: |
| 25 | * This function returns 0 in case all ASN.1 constraints are met |
| 26 | * and -1 if one or more constraints were failed. |
| 27 | */ |
| 28 | int asn_check_constraints( |
| 29 | const struct asn_TYPE_descriptor_s *type_descriptor, |
| 30 | const void *struct_ptr, /* Target language's structure */ |
| 31 | char *errbuf, /* Returned error description */ |
| 32 | size_t *errlen /* Length of the error description */ |
| 33 | ); |
| 34 | |
| 35 | |
| 36 | /* |
| 37 | * Generic type for constraint checking callback, |
| 38 | * associated with every type descriptor. |
| 39 | */ |
| 40 | typedef int(asn_constr_check_f)( |
| 41 | const struct asn_TYPE_descriptor_s *type_descriptor, const void *struct_ptr, |
| 42 | asn_app_constraint_failed_f *optional_callback, /* Log the error */ |
| 43 | void *optional_app_key /* Opaque key passed to a callback */ |
| 44 | ); |
| 45 | |
| 46 | /******************************* |
| 47 | * INTERNALLY USEFUL FUNCTIONS * |
| 48 | *******************************/ |
| 49 | |
| 50 | asn_constr_check_f asn_generic_no_constraint; /* No constraint whatsoever */ |
| 51 | asn_constr_check_f asn_generic_unknown_constraint; /* Not fully supported */ |
| 52 | |
| 53 | /* |
| 54 | * Invoke the callback with a complete error message. |
| 55 | */ |
| 56 | #define ASN__CTFAIL if(ctfailcb) ctfailcb |
| 57 | |
| 58 | #ifdef __cplusplus |
| 59 | } |
| 60 | #endif |
| 61 | |
| 62 | #endif /* ASN1_CONSTRAINTS_VALIDATOR_H */ |