X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/8c6fa3fbaccc22127280bf77a48fab5a3ee0716e..46b0747592074017ff0ea4b33d4a7194235886e5:/stglibs/smux.lib/der_encoder.c

diff --git a/stglibs/smux.lib/der_encoder.c b/stglibs/smux.lib/der_encoder.c
deleted file mode 100644
index 6c859e1b..00000000
--- a/stglibs/smux.lib/der_encoder.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*-
- * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
- * Redistribution and modifications are permitted subject to BSD license.
- */
-#include <asn_internal.h>
-#include <errno.h>
-
-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(asn_TYPE_descriptor_t *type_descriptor, 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->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(asn_TYPE_descriptor_t *type_descriptor, 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->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(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) {
-	ber_tlv_tag_t *tags;	/* Copy of tags stream */
-	int tags_count;		/* Number of tags */
-	size_t overall_length;
-	ssize_t *lens;
-	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(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;
-		tags = (ber_tlv_tag_t *)alloca((sd->tags_count + 1) * sizeof(ber_tlv_tag_t));
-		if(!tags) {	/* Can fail on !x86 */
-			errno = ENOMEM;
-			return -1;
-		}
-		tags_count = sd->tags_count
-			+ 1	/* EXPLICIT or IMPLICIT tag is given */
-			- ((tag_mode == -1) && sd->tags_count);
-		/* Copy tags over */
-		tags[0] = tag;
-		stag_offset = -1 + ((tag_mode == -1) && sd->tags_count);
-		for(i = 1; i < tags_count; i++)
-			tags[i] = sd->tags[i + stag_offset];
-	} else {
-		tags = sd->tags;
-		tags_count = sd->tags_count;
-	}
-
-	/* No tags to write */
-	if(tags_count == 0)
-		return 0;
-
-	lens = (ssize_t *)alloca(tags_count * sizeof(lens[0]));
-	if(!lens) {
-		errno = ENOMEM;
-		return -1;
-	}
-
-	/*
-	 * 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("%s %s TL sequence (%d elements)",
-		cb?"Encoding":"Estimating", 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;
-}