| /*- |
| * 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_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, |
| #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, |
| #else |
| NativeInteger_decode_uper, /* Unaligned PER decoder */ |
| NativeInteger_encode_uper, /* Unaligned PER encoder */ |
| #endif /* ASN_DISABLE_PER_SUPPORT */ |
| 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 OER visible constraints */ |
| 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, (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(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, (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(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, (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(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("<absent>", 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); |
| } |
| } |
| |