| /*- |
| * Copyright (c) 2004, 2005, 2006 Lev Walkin <vlm@lionet.info>. |
| * All rights reserved. |
| * Redistribution and modifications are permitted subject to BSD license. |
| */ |
| /* |
| * Read the NativeInteger.h for the explanation wrt. differences between |
| * INTEGER and NativeInteger. |
| * Basically, both are decoders and encoders of ASN.1 INTEGER type, but this |
| * implementation deals with the standard (machine-specific) representation |
| * of them instead of using the platform-independent buffer. |
| */ |
| #include <asn_internal.h> |
| #include <NativeInteger.h> |
| |
| /* |
| * NativeInteger basic type description. |
| */ |
| static const ber_tlv_tag_t asn_DEF_NativeInteger_tags[] = { |
| (ASN_TAG_CLASS_UNIVERSAL | (2 << 2)) |
| }; |
| asn_TYPE_operation_t asn_OP_NativeInteger = { |
| NativeInteger_free, |
| NativeInteger_print, |
| NativeInteger_compare, |
| NativeInteger_decode_ber, |
| NativeInteger_encode_der, |
| NativeInteger_decode_xer, |
| NativeInteger_encode_xer, |
| #ifdef ASN_DISABLE_OER_SUPPORT |
| 0, |
| 0, |
| #else |
| NativeInteger_decode_oer, /* OER decoder */ |
| NativeInteger_encode_oer, /* Canonical OER encoder */ |
| #endif /* ASN_DISABLE_OER_SUPPORT */ |
| #ifdef ASN_DISABLE_PER_SUPPORT |
| 0, |
| 0, |
| 0, |
| 0, |
| #else |
| NativeInteger_decode_uper, /* Unaligned PER decoder */ |
| NativeInteger_encode_uper, /* Unaligned PER encoder */ |
| NativeInteger_decode_aper, /* Aligned PER decoder */ |
| NativeInteger_encode_aper, /* Aligned PER encoder */ |
| #endif /* ASN_DISABLE_PER_SUPPORT */ |
| NativeInteger_random_fill, |
| 0 /* Use generic outmost tag fetcher */ |
| }; |
| asn_TYPE_descriptor_t asn_DEF_NativeInteger = { |
| "INTEGER", /* The ASN.1 type is still INTEGER */ |
| "INTEGER", |
| &asn_OP_NativeInteger, |
| asn_DEF_NativeInteger_tags, |
| sizeof(asn_DEF_NativeInteger_tags) / sizeof(asn_DEF_NativeInteger_tags[0]), |
| asn_DEF_NativeInteger_tags, /* Same as above */ |
| sizeof(asn_DEF_NativeInteger_tags) / sizeof(asn_DEF_NativeInteger_tags[0]), |
| { 0, 0, asn_generic_no_constraint }, |
| 0, 0, /* No members */ |
| 0 /* No specifics */ |
| }; |
| |
| /* |
| * Decode INTEGER type. |
| */ |
| asn_dec_rval_t |
| NativeInteger_decode_ber(const asn_codec_ctx_t *opt_codec_ctx, |
| const asn_TYPE_descriptor_t *td, void **nint_ptr, |
| const void *buf_ptr, size_t size, int tag_mode) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| long *native = (long *)*nint_ptr; |
| asn_dec_rval_t rval; |
| ber_tlv_len_t length; |
| |
| /* |
| * If the structure is not there, allocate it. |
| */ |
| if(native == NULL) { |
| native = (long *)(*nint_ptr = CALLOC(1, sizeof(*native))); |
| if(native == NULL) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| } |
| |
| ASN_DEBUG("Decoding %s as INTEGER (tm=%d)", |
| td->name, tag_mode); |
| |
| /* |
| * Check tags. |
| */ |
| rval = ber_check_tags(opt_codec_ctx, td, 0, buf_ptr, size, |
| tag_mode, 0, &length, 0); |
| if(rval.code != RC_OK) |
| return rval; |
| |
| ASN_DEBUG("%s length is %d bytes", td->name, (int)length); |
| |
| /* |
| * Make sure we have this length. |
| */ |
| buf_ptr = ((const char *)buf_ptr) + rval.consumed; |
| size -= rval.consumed; |
| if(length > (ber_tlv_len_t)size) { |
| rval.code = RC_WMORE; |
| rval.consumed = 0; |
| return rval; |
| } |
| |
| /* |
| * ASN.1 encoded INTEGER: buf_ptr, length |
| * Fill the native, at the same time checking for overflow. |
| * If overflow occured, return with RC_FAIL. |
| */ |
| { |
| INTEGER_t tmp; |
| union { |
| const void *constbuf; |
| void *nonconstbuf; |
| } unconst_buf; |
| long l; |
| |
| unconst_buf.constbuf = buf_ptr; |
| tmp.buf = (uint8_t *)unconst_buf.nonconstbuf; |
| tmp.size = length; |
| |
| if((specs&&specs->field_unsigned) |
| ? asn_INTEGER2ulong(&tmp, (unsigned long *)&l) /* sic */ |
| : asn_INTEGER2long(&tmp, &l)) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| |
| *native = l; |
| } |
| |
| rval.code = RC_OK; |
| rval.consumed += length; |
| |
| ASN_DEBUG("Took %ld/%ld bytes to encode %s (%ld)", |
| (long)rval.consumed, (long)length, td->name, (long)*native); |
| |
| return rval; |
| } |
| |
| /* |
| * Encode the NativeInteger using the standard INTEGER type DER encoder. |
| */ |
| asn_enc_rval_t |
| NativeInteger_encode_der(const asn_TYPE_descriptor_t *sd, const void *ptr, |
| int tag_mode, ber_tlv_tag_t tag, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| unsigned long native = *(const unsigned long *)ptr; /* Disable sign ext. */ |
| asn_enc_rval_t erval = {0,0,0}; |
| INTEGER_t tmp; |
| |
| #ifdef WORDS_BIGENDIAN /* Opportunistic optimization */ |
| |
| tmp.buf = (uint8_t *)&native; |
| tmp.size = sizeof(native); |
| |
| #else /* Works even if WORDS_BIGENDIAN is not set where should've been */ |
| uint8_t buf[sizeof(native)]; |
| uint8_t *p; |
| |
| /* Prepare a fake INTEGER */ |
| for(p = buf + sizeof(buf) - 1; p >= buf; p--, native >>= 8) |
| *p = (uint8_t)native; |
| |
| tmp.buf = buf; |
| tmp.size = sizeof(buf); |
| #endif /* WORDS_BIGENDIAN */ |
| |
| /* Encode fake INTEGER */ |
| erval = INTEGER_encode_der(sd, &tmp, tag_mode, tag, cb, app_key); |
| if(erval.structure_ptr == &tmp) { |
| erval.structure_ptr = ptr; |
| } |
| return erval; |
| } |
| |
| /* |
| * Decode the chunk of XML text encoding INTEGER. |
| */ |
| asn_dec_rval_t |
| NativeInteger_decode_xer(const asn_codec_ctx_t *opt_codec_ctx, |
| const asn_TYPE_descriptor_t *td, void **sptr, |
| const char *opt_mname, const void *buf_ptr, |
| size_t size) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| asn_dec_rval_t rval; |
| INTEGER_t st; |
| void *st_ptr = (void *)&st; |
| long *native = (long *)*sptr; |
| |
| if(!native) { |
| native = (long *)(*sptr = CALLOC(1, sizeof(*native))); |
| if(!native) ASN__DECODE_FAILED; |
| } |
| |
| memset(&st, 0, sizeof(st)); |
| rval = INTEGER_decode_xer(opt_codec_ctx, td, &st_ptr, |
| opt_mname, buf_ptr, size); |
| if(rval.code == RC_OK) { |
| long l; |
| if((specs&&specs->field_unsigned) |
| ? asn_INTEGER2ulong(&st, (unsigned long *)&l) /* sic */ |
| : asn_INTEGER2long(&st, &l)) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| } else { |
| *native = l; |
| } |
| } else { |
| /* |
| * Cannot restart from the middle; |
| * there is no place to save state in the native type. |
| * Request a continuation from the very beginning. |
| */ |
| rval.consumed = 0; |
| } |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &st); |
| return rval; |
| } |
| |
| |
| asn_enc_rval_t |
| NativeInteger_encode_xer(const asn_TYPE_descriptor_t *td, const void *sptr, |
| int ilevel, enum xer_encoder_flags_e flags, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| char scratch[32]; /* Enough for 64-bit int */ |
| asn_enc_rval_t er = {0,0,0}; |
| const long *native = (const long *)sptr; |
| |
| (void)ilevel; |
| (void)flags; |
| |
| if(!native) ASN__ENCODE_FAILED; |
| |
| er.encoded = snprintf(scratch, sizeof(scratch), |
| (specs && specs->field_unsigned) |
| ? "%lu" : "%ld", *native); |
| if(er.encoded <= 0 || (size_t)er.encoded >= sizeof(scratch) |
| || cb(scratch, er.encoded, app_key) < 0) |
| ASN__ENCODE_FAILED; |
| |
| ASN__ENCODED_OK(er); |
| } |
| |
| #ifndef ASN_DISABLE_PER_SUPPORT |
| |
| asn_dec_rval_t |
| NativeInteger_decode_uper(const asn_codec_ctx_t *opt_codec_ctx, |
| const asn_TYPE_descriptor_t *td, |
| const asn_per_constraints_t *constraints, void **sptr, |
| asn_per_data_t *pd) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| asn_dec_rval_t rval; |
| long *native = (long *)*sptr; |
| INTEGER_t tmpint; |
| void *tmpintptr = &tmpint; |
| |
| (void)opt_codec_ctx; |
| ASN_DEBUG("Decoding NativeInteger %s (UPER)", td->name); |
| |
| if(!native) { |
| native = (long *)(*sptr = CALLOC(1, sizeof(*native))); |
| if(!native) ASN__DECODE_FAILED; |
| } |
| |
| memset(&tmpint, 0, sizeof tmpint); |
| rval = INTEGER_decode_uper(opt_codec_ctx, td, constraints, |
| &tmpintptr, pd); |
| if(rval.code == RC_OK) { |
| if((specs&&specs->field_unsigned) |
| ? asn_INTEGER2ulong(&tmpint, (unsigned long *)native) |
| : asn_INTEGER2long(&tmpint, native)) |
| rval.code = RC_FAIL; |
| else |
| ASN_DEBUG("NativeInteger %s got value %ld", |
| td->name, *native); |
| } |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint); |
| |
| return rval; |
| } |
| |
| asn_enc_rval_t |
| NativeInteger_encode_uper(const asn_TYPE_descriptor_t *td, |
| const asn_per_constraints_t *constraints, |
| const void *sptr, asn_per_outp_t *po) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| asn_enc_rval_t er = {0,0,0}; |
| long native; |
| INTEGER_t tmpint; |
| |
| if(!sptr) ASN__ENCODE_FAILED; |
| |
| native = *(const long *)sptr; |
| |
| ASN_DEBUG("Encoding NativeInteger %s %ld (UPER)", td->name, native); |
| |
| memset(&tmpint, 0, sizeof(tmpint)); |
| if((specs&&specs->field_unsigned) |
| ? asn_ulong2INTEGER(&tmpint, native) |
| : asn_long2INTEGER(&tmpint, native)) |
| ASN__ENCODE_FAILED; |
| er = INTEGER_encode_uper(td, constraints, &tmpint, po); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint); |
| return er; |
| } |
| |
| asn_dec_rval_t |
| NativeInteger_decode_aper(const asn_codec_ctx_t *opt_codec_ctx, |
| const asn_TYPE_descriptor_t *td, |
| const asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) { |
| |
| const asn_INTEGER_specifics_t *specs = (const asn_INTEGER_specifics_t *)td->specifics; |
| asn_dec_rval_t rval; |
| long *native = (long *)*sptr; |
| INTEGER_t tmpint; |
| void *tmpintptr = &tmpint; |
| |
| (void)opt_codec_ctx; |
| ASN_DEBUG("Decoding NativeInteger %s (APER)", td->name); |
| |
| if(!native) { |
| native = (long *)(*sptr = CALLOC(1, sizeof(*native))); |
| if(!native) ASN__DECODE_FAILED; |
| } |
| |
| memset(&tmpint, 0, sizeof tmpint); |
| rval = INTEGER_decode_aper(opt_codec_ctx, td, constraints, |
| &tmpintptr, pd); |
| if(rval.code == RC_OK) { |
| if((specs&&specs->field_unsigned) |
| ? asn_INTEGER2ulong(&tmpint, (unsigned long *)native) |
| : asn_INTEGER2long(&tmpint, native)) |
| rval.code = RC_FAIL; |
| else |
| ASN_DEBUG("NativeInteger %s got value %ld", |
| td->name, *native); |
| } |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint); |
| |
| return rval; |
| } |
| |
| asn_enc_rval_t |
| NativeInteger_encode_aper(const asn_TYPE_descriptor_t *td, |
| const asn_per_constraints_t *constraints, |
| const void *sptr, asn_per_outp_t *po) { |
| |
| const asn_INTEGER_specifics_t *specs = (const asn_INTEGER_specifics_t *)td->specifics; |
| asn_enc_rval_t er = {0,0,0}; |
| long native; |
| INTEGER_t tmpint; |
| |
| if(!sptr) ASN__ENCODE_FAILED; |
| |
| native = *(const long *)sptr; |
| |
| ASN_DEBUG("Encoding NativeInteger %s %ld (APER)", td->name, native); |
| |
| memset(&tmpint, 0, sizeof(tmpint)); |
| if((specs&&specs->field_unsigned) |
| ? asn_ulong2INTEGER(&tmpint, (unsigned long)native) |
| : asn_long2INTEGER(&tmpint, native)) |
| ASN__ENCODE_FAILED; |
| er = INTEGER_encode_aper(td, constraints, &tmpint, po); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint); |
| return er; |
| } |
| |
| #endif /* ASN_DISABLE_PER_SUPPORT */ |
| |
| /* |
| * INTEGER specific human-readable output. |
| */ |
| int |
| NativeInteger_print(const asn_TYPE_descriptor_t *td, const void *sptr, |
| int ilevel, asn_app_consume_bytes_f *cb, void *app_key) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| const long *native = (const long *)sptr; |
| char scratch[32]; /* Enough for 64-bit int */ |
| int ret; |
| |
| (void)td; /* Unused argument */ |
| (void)ilevel; /* Unused argument */ |
| |
| if(native) { |
| long value = *native; |
| ret = snprintf(scratch, sizeof(scratch), |
| (specs && specs->field_unsigned) ? "%lu" : "%ld", value); |
| assert(ret > 0 && (size_t)ret < sizeof(scratch)); |
| if(cb(scratch, ret, app_key) < 0) return -1; |
| if(specs && (value >= 0 || !specs->field_unsigned)) { |
| const asn_INTEGER_enum_map_t *el = |
| INTEGER_map_value2enum(specs, value); |
| if(el) { |
| if(cb(" (", 2, app_key) < 0) return -1; |
| if(cb(el->enum_name, el->enum_len, app_key) < 0) return -1; |
| if(cb(")", 1, app_key) < 0) return -1; |
| } |
| } |
| return 0; |
| } else { |
| return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
| } |
| } |
| |
| void |
| NativeInteger_free(const asn_TYPE_descriptor_t *td, void *ptr, |
| enum asn_struct_free_method method) { |
| if(!td || !ptr) |
| return; |
| |
| ASN_DEBUG("Freeing %s as INTEGER (%d, %p, Native)", |
| td->name, method, ptr); |
| |
| switch(method) { |
| case ASFM_FREE_EVERYTHING: |
| FREEMEM(ptr); |
| break; |
| case ASFM_FREE_UNDERLYING: |
| break; |
| case ASFM_FREE_UNDERLYING_AND_RESET: |
| memset(ptr, 0, sizeof(long)); |
| break; |
| } |
| } |
| |
| int |
| NativeInteger_compare(const asn_TYPE_descriptor_t *td, const void *aptr, const void *bptr) { |
| (void)td; |
| |
| if(aptr && bptr) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| if(specs && specs->field_unsigned) { |
| const unsigned long *a = aptr; |
| const unsigned long *b = bptr; |
| if(*a < *b) { |
| return -1; |
| } else if(*a > *b) { |
| return 1; |
| } else { |
| return 0; |
| } |
| } else { |
| const long *a = aptr; |
| const long *b = bptr; |
| if(*a < *b) { |
| return -1; |
| } else if(*a > *b) { |
| return 1; |
| } else { |
| return 0; |
| } |
| } |
| } else if(!aptr) { |
| return -1; |
| } else { |
| return 1; |
| } |
| } |
| |
| asn_random_fill_result_t |
| NativeInteger_random_fill(const asn_TYPE_descriptor_t *td, void **sptr, |
| const asn_encoding_constraints_t *constraints, |
| size_t max_length) { |
| const asn_INTEGER_specifics_t *specs = |
| (const asn_INTEGER_specifics_t *)td->specifics; |
| asn_random_fill_result_t result_ok = {ARFILL_OK, 1}; |
| asn_random_fill_result_t result_failed = {ARFILL_FAILED, 0}; |
| asn_random_fill_result_t result_skipped = {ARFILL_SKIPPED, 0}; |
| long *st = *sptr; |
| const asn_INTEGER_enum_map_t *emap; |
| size_t emap_len; |
| intmax_t value; |
| int find_inside_map; |
| |
| if(max_length == 0) return result_skipped; |
| |
| if(st == NULL) { |
| st = (long *)CALLOC(1, sizeof(*st)); |
| if(st == NULL) { |
| return result_failed; |
| } |
| } |
| |
| if(specs) { |
| emap = specs->value2enum; |
| emap_len = specs->map_count; |
| if(specs->strict_enumeration) { |
| find_inside_map = emap_len > 0; |
| } else { |
| find_inside_map = emap_len ? asn_random_between(0, 1) : 0; |
| } |
| } else { |
| emap = 0; |
| emap_len = 0; |
| find_inside_map = 0; |
| } |
| |
| if(find_inside_map) { |
| assert(emap_len > 0); |
| value = emap[asn_random_between(0, emap_len - 1)].nat_value; |
| } else { |
| const asn_per_constraints_t *ct; |
| |
| static const long variants[] = { |
| -65536, -65535, -65534, -32769, -32768, -32767, -16385, -16384, |
| -16383, -257, -256, -255, -254, -129, -128, -127, |
| -126, -1, 0, 1, 126, 127, 128, 129, |
| 254, 255, 256, 257, 16383, 16384, 16385, 32767, |
| 32768, 32769, 65534, 65535, 65536, 65537}; |
| if(specs && specs->field_unsigned) { |
| assert(variants[18] == 0); |
| value = variants[asn_random_between( |
| 18, sizeof(variants) / sizeof(variants[0]) - 1)]; |
| } else { |
| value = variants[asn_random_between( |
| 0, sizeof(variants) / sizeof(variants[0]) - 1)]; |
| } |
| |
| if(!constraints) constraints = &td->encoding_constraints; |
| ct = constraints ? constraints->per_constraints : 0; |
| if(ct && (ct->value.flags & APC_CONSTRAINED)) { |
| if(value < ct->value.lower_bound || value > ct->value.upper_bound) { |
| value = asn_random_between(ct->value.lower_bound, |
| ct->value.upper_bound); |
| } |
| } |
| } |
| |
| *sptr = st; |
| *st = value; |
| return result_ok; |
| } |