Lev Walkin | a737f3b | 2004-09-02 12:11:47 +0000 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| 3 | * Redistribution and modifications are permitted subject to BSD license. |
| 4 | */ |
| 5 | #include <ANY.h> |
| 6 | #include <assert.h> |
| 7 | #include <errno.h> |
| 8 | |
| 9 | asn1_TYPE_descriptor_t asn1_DEF_ANY = { |
| 10 | "ANY", |
| 11 | asn_generic_no_constraint, |
| 12 | OCTET_STRING_decode_ber, |
| 13 | OCTET_STRING_encode_der, |
| 14 | OCTET_STRING_print, |
| 15 | OCTET_STRING_free, |
| 16 | 0, /* Use generic outmost tag fetcher */ |
Lev Walkin | d563d39 | 2004-09-13 08:26:57 +0000 | [diff] [blame] | 17 | 0, 0, 0, 0, |
Lev Walkin | a737f3b | 2004-09-02 12:11:47 +0000 | [diff] [blame] | 18 | -1, /* Both ways are fine (primitive and constructed) */ |
| 19 | 0, 0, /* No members */ |
| 20 | (void *)1 /* Special indicator that this is an ANY type */ |
| 21 | }; |
Lev Walkin | d563d39 | 2004-09-13 08:26:57 +0000 | [diff] [blame] | 22 | |
| 23 | |
| 24 | struct _callback_arg { |
| 25 | uint8_t *buffer; |
| 26 | size_t offset; |
| 27 | size_t size; |
| 28 | }; |
| 29 | |
| 30 | static int ANY__consume_bytes(const void *buffer, size_t size, void *key); |
| 31 | |
| 32 | int |
| 33 | ANY_fromType(ANY_t *st, asn1_TYPE_descriptor_t *td, void *sptr) { |
| 34 | struct _callback_arg arg; |
| 35 | der_enc_rval_t erval; |
| 36 | |
| 37 | if(!st || !td) { |
| 38 | errno = EINVAL; |
| 39 | return -1; |
| 40 | } |
| 41 | |
| 42 | if(!sptr) { |
| 43 | if(st->buf) FREEMEM(st->buf); |
| 44 | st->size = 0; |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | arg.offset = arg.size = 0; |
| 49 | arg.buffer = 0; |
| 50 | |
| 51 | erval = der_encode(td, sptr, ANY__consume_bytes, &arg); |
| 52 | if(erval.encoded == -1) { |
| 53 | if(arg.buffer) FREEMEM(arg.buffer); |
| 54 | return -1; |
| 55 | } |
| 56 | assert(erval.encoded == arg.offset); |
| 57 | |
| 58 | if(st->buf) FREEMEM(st->buf); |
| 59 | st->buf = arg.buffer; |
| 60 | st->size = arg.offset; |
| 61 | |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | ANY_t * |
| 66 | ANY_new_fromType(asn1_TYPE_descriptor_t *td, void *sptr) { |
| 67 | ANY_t tmp; |
| 68 | ANY_t *st; |
| 69 | |
| 70 | if(!td || !sptr) { |
| 71 | errno = EINVAL; |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | memset(&tmp, 0, sizeof(tmp)); |
| 76 | |
| 77 | if(ANY_fromType(&tmp, td, sptr)) return 0; |
| 78 | |
| 79 | st = (ANY_t *)MALLOC(sizeof(*st)); |
| 80 | if(st) { |
| 81 | *st = tmp; |
| 82 | return st; |
| 83 | } else { |
| 84 | FREEMEM(tmp.buf); |
| 85 | return 0; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | int |
| 90 | ANY_to_type(ANY_t *st, asn1_TYPE_descriptor_t *td, void **struct_ptr) { |
| 91 | ber_dec_rval_t rval; |
| 92 | void *newst = 0; |
| 93 | |
| 94 | if(!st || !td || !struct_ptr) { |
| 95 | errno = EINVAL; |
| 96 | return -1; |
| 97 | } |
| 98 | |
| 99 | if(st->buf == 0) { |
| 100 | /* Nothing to convert, make it empty. */ |
| 101 | *struct_ptr = (void *)0; |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | rval = ber_decode(td, (void **)&newst, st->buf, st->size); |
| 106 | if(rval.code == RC_OK) { |
| 107 | *struct_ptr = newst; |
| 108 | return 0; |
| 109 | } else { |
| 110 | /* Remove possibly partially decoded data. */ |
| 111 | td->free_struct(td, newst, 0); |
| 112 | return -1; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | static int ANY__consume_bytes(const void *buffer, size_t size, void *key) { |
| 117 | struct _callback_arg *arg = (struct _callback_arg *)key; |
| 118 | |
| 119 | if((arg->offset + size) >= arg->size) { |
| 120 | size_t nsize = (arg->size ? arg->size << 2 : 16) + size; |
| 121 | void *p = REALLOC(arg->buffer, nsize); |
| 122 | if(!p) return -1; |
| 123 | (void *)arg->buffer = p; |
| 124 | arg->size = nsize; |
| 125 | } |
| 126 | |
| 127 | memcpy(arg->buffer + arg->offset, buffer, size); |
| 128 | arg->offset += size; |
| 129 | assert(arg->offset < arg->size); |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |