X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2FASN1c%2Fder_encoder.c;fp=e2sim%2Fe2apv1sim%2FASN1c%2Fder_encoder.c;h=0000000000000000000000000000000000000000;hp=2c6a6f769b92c34f9e5809d2d38bd1f3f40f69b3;hb=a9733dbcc47e93a3b2843056f1d587196296c324;hpb=3ebf932d23dcbec9ed19f4a51f9d00a0a54f5124 diff --git a/e2sim/e2apv1sim/ASN1c/der_encoder.c b/e2sim/e2apv1sim/ASN1c/der_encoder.c deleted file mode 100644 index 2c6a6f7..0000000 --- a/e2sim/e2apv1sim/ASN1c/der_encoder.c +++ /dev/null @@ -1,194 +0,0 @@ -/*- - * Copyright (c) 2003, 2004 Lev Walkin . All rights reserved. - * Redistribution and modifications are permitted subject to BSD license. - */ -#include -#include - -static ssize_t der_write_TL(ber_tlv_tag_t tag, ber_tlv_len_t len, - asn_app_consume_bytes_f *cb, void *app_key, int constructed); - -/* - * The DER encoder of any type. - */ -asn_enc_rval_t -der_encode(const asn_TYPE_descriptor_t *type_descriptor, const void *struct_ptr, - asn_app_consume_bytes_f *consume_bytes, void *app_key) { - ASN_DEBUG("DER encoder invoked for %s", - type_descriptor->name); - - /* - * Invoke type-specific encoder. - */ - return type_descriptor->op->der_encoder( - type_descriptor, struct_ptr, /* Pointer to the destination structure */ - 0, 0, consume_bytes, app_key); -} - -/* - * Argument type and callback necessary for der_encode_to_buffer(). - */ -typedef struct enc_to_buf_arg { - void *buffer; - size_t left; -} enc_to_buf_arg; -static int encode_to_buffer_cb(const void *buffer, size_t size, void *key) { - enc_to_buf_arg *arg = (enc_to_buf_arg *)key; - - if(arg->left < size) - return -1; /* Data exceeds the available buffer size */ - - memcpy(arg->buffer, buffer, size); - arg->buffer = ((char *)arg->buffer) + size; - arg->left -= size; - - return 0; -} - -/* - * A variant of the der_encode() which encodes the data into the provided buffer - */ -asn_enc_rval_t -der_encode_to_buffer(const asn_TYPE_descriptor_t *type_descriptor, - const void *struct_ptr, void *buffer, size_t buffer_size) { - enc_to_buf_arg arg; - asn_enc_rval_t ec; - - arg.buffer = buffer; - arg.left = buffer_size; - - ec = type_descriptor->op->der_encoder(type_descriptor, - struct_ptr, /* Pointer to the destination structure */ - 0, 0, encode_to_buffer_cb, &arg); - if(ec.encoded != -1) { - assert(ec.encoded == (ssize_t)(buffer_size - arg.left)); - /* Return the encoded contents size */ - } - return ec; -} - - -/* - * Write out leading TL[v] sequence according to the type definition. - */ -ssize_t -der_write_tags(const asn_TYPE_descriptor_t *sd, size_t struct_length, - int tag_mode, int last_tag_form, - ber_tlv_tag_t tag, /* EXPLICIT or IMPLICIT tag */ - asn_app_consume_bytes_f *cb, void *app_key) { -#define ASN1_DER_MAX_TAGS_COUNT 4 - ber_tlv_tag_t - tags_buf_scratch[ASN1_DER_MAX_TAGS_COUNT * sizeof(ber_tlv_tag_t)]; - ssize_t lens[ASN1_DER_MAX_TAGS_COUNT * sizeof(ssize_t)]; - const ber_tlv_tag_t *tags; /* Copy of tags stream */ - int tags_count; /* Number of tags */ - size_t overall_length; - int i; - - ASN_DEBUG("Writing tags (%s, tm=%d, tc=%d, tag=%s, mtc=%d)", - sd->name, tag_mode, sd->tags_count, - ber_tlv_tag_string(tag), - tag_mode - ?(sd->tags_count+1 - -((tag_mode == -1) && sd->tags_count)) - :sd->tags_count - ); - - if(sd->tags_count + 1 > ASN1_DER_MAX_TAGS_COUNT) { - ASN_DEBUG("System limit %d on tags count", ASN1_DER_MAX_TAGS_COUNT); - return -1; - } - - if(tag_mode) { - /* - * Instead of doing shaman dance like we do in ber_check_tags(), - * allocate a small array on the stack - * and initialize it appropriately. - */ - int stag_offset; - ber_tlv_tag_t *tags_buf = tags_buf_scratch; - tags_count = sd->tags_count - + 1 /* EXPLICIT or IMPLICIT tag is given */ - - ((tag_mode == -1) && sd->tags_count); - /* Copy tags over */ - tags_buf[0] = tag; - stag_offset = -1 + ((tag_mode == -1) && sd->tags_count); - for(i = 1; i < tags_count; i++) - tags_buf[i] = sd->tags[i + stag_offset]; - tags = tags_buf; - } else { - tags = sd->tags; - tags_count = sd->tags_count; - } - - /* No tags to write */ - if(tags_count == 0) - return 0; - - /* - * Array of tags is initialized. - * Now, compute the size of the TLV pairs, from right to left. - */ - overall_length = struct_length; - for(i = tags_count - 1; i >= 0; --i) { - lens[i] = der_write_TL(tags[i], overall_length, 0, 0, 0); - if(lens[i] == -1) return -1; - overall_length += lens[i]; - lens[i] = overall_length - lens[i]; - } - - if(!cb) return overall_length - struct_length; - - ASN_DEBUG("Encoding %s TL sequence (%d elements)", sd->name, - tags_count); - - /* - * Encode the TL sequence for real. - */ - for(i = 0; i < tags_count; i++) { - ssize_t len; - int _constr; - - /* Check if this tag happens to be constructed */ - _constr = (last_tag_form || i < (tags_count - 1)); - - len = der_write_TL(tags[i], lens[i], cb, app_key, _constr); - if(len == -1) return -1; - } - - return overall_length - struct_length; -} - -static ssize_t -der_write_TL(ber_tlv_tag_t tag, ber_tlv_len_t len, - asn_app_consume_bytes_f *cb, void *app_key, - int constructed) { - uint8_t buf[32]; - size_t size = 0; - int buf_size = cb?sizeof(buf):0; - ssize_t tmp; - - /* Serialize tag (T from TLV) into possibly zero-length buffer */ - tmp = ber_tlv_tag_serialize(tag, buf, buf_size); - if(tmp == -1 || tmp > (ssize_t)sizeof(buf)) return -1; - size += tmp; - - /* Serialize length (L from TLV) into possibly zero-length buffer */ - tmp = der_tlv_length_serialize(len, buf+size, buf_size?buf_size-size:0); - if(tmp == -1) return -1; - size += tmp; - - if(size > sizeof(buf)) - return -1; - - /* - * If callback is specified, invoke it, and check its return value. - */ - if(cb) { - if(constructed) *buf |= 0x20; - if(cb(buf, size, app_key) < 0) - return -1; - } - - return size; -}