/*- * Copyright (c) 2004, 2005, 2006 Lev Walkin . * 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 ber_tlv_tag_t asn_DEF_NativeInteger_tags[] = { (ASN_TAG_CLASS_UNIVERSAL | (2 << 2)) }; asn_TYPE_descriptor_t asn_DEF_NativeInteger = { "INTEGER", /* The ASN.1 type is still INTEGER */ "INTEGER", NativeInteger_free, NativeInteger_print, asn_generic_no_constraint, NativeInteger_decode_ber, NativeInteger_encode_der, NativeInteger_decode_xer, NativeInteger_encode_xer, NativeInteger_decode_uper, /* Unaligned PER decoder */ NativeInteger_encode_uper, /* Unaligned PER encoder */ 0, /* Use generic outmost tag fetcher */ 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, /* No PER visible constraints */ 0, 0, /* No members */ 0 /* No specifics */ }; /* * Decode INTEGER type. */ asn_dec_rval_t NativeInteger_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, void **nint_ptr, const void *buf_ptr, size_t size, int tag_mode) { asn_INTEGER_specifics_t *specs=(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, &l) : 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(asn_TYPE_descriptor_t *sd, void *ptr, int tag_mode, ber_tlv_tag_t tag, asn_app_consume_bytes_f *cb, void *app_key) { unsigned long native = *(unsigned long *)ptr; /* Disable sign ext. */ asn_enc_rval_t erval; 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.encoded == -1) { assert(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(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, void **sptr, const char *opt_mname, const void *buf_ptr, size_t size) { asn_INTEGER_specifics_t *specs=(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, &l) : 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(asn_TYPE_descriptor_t *td, void *sptr, int ilevel, enum xer_encoder_flags_e flags, asn_app_consume_bytes_f *cb, void *app_key) { asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics; char scratch[32]; /* Enough for 64-bit int */ asn_enc_rval_t er; 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); } asn_dec_rval_t NativeInteger_decode_uper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) { asn_INTEGER_specifics_t *specs=(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, 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(asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, void *sptr, asn_per_outp_t *po) { asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics; asn_enc_rval_t er; long native; INTEGER_t tmpint; if(!sptr) _ASN_ENCODE_FAILED; native = *(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; } /* * INTEGER specific human-readable output. */ int NativeInteger_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, asn_app_consume_bytes_f *cb, void *app_key) { asn_INTEGER_specifics_t *specs=(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) { ret = snprintf(scratch, sizeof(scratch), (specs && specs->field_unsigned) ? "%lu" : "%ld", *native); assert(ret > 0 && (size_t)ret < sizeof(scratch)); return (cb(scratch, ret, app_key) < 0) ? -1 : 0; } else { return (cb("", 8, app_key) < 0) ? -1 : 0; } } void NativeInteger_free(asn_TYPE_descriptor_t *td, void *ptr, int contents_only) { if(!td || !ptr) return; ASN_DEBUG("Freeing %s as INTEGER (%d, %p, Native)", td->name, contents_only, ptr); if(!contents_only) { FREEMEM(ptr); } }