new PER tests

asn1c/tests/check-126.-gen-PER.c

+/*
+ * Mode of operation:
+ * Each of the *.in files is XER-decoded, then converted into PER,
+ * compared with *.out file, then decoded and compared with the original.
+ */
+#undef	NDEBUG
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>	/* for chdir(2) */
+#include <string.h>
+#include <dirent.h>
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include <PDU.h>
+
+static unsigned char buf[4096];
+static int buf_offset;
+
+static int
+_buf_writer(const void *buffer, size_t size, void *app_key) {
+	unsigned char *b, *bend;
+	(void)app_key;
+	assert(buf_offset + size < sizeof(buf));
+	memcpy(buf + buf_offset, buffer, size);
+	b = buf + buf_offset;
+	bend = b + size;
+	fprintf(stderr, "=> [");
+	for(; b < bend; b++) {
+		if(*b >= 32 && *b < 127 && *b != '%')
+			fprintf(stderr, "%c", *b);
+		else
+			fprintf(stderr, "%%%02x", *b);
+	}
+	fprintf(stderr, "]:%ld\n", (long)size);
+	buf_offset += size;
+	return 0;
+}
+
+enum enctype {
+	AS_PER,
+	AS_DER,
+	AS_XER,
+	AS_CXER,
+};
+
+static void
+save_object_as(PDU_t *st, enum enctype how) {
+	asn_enc_rval_t rval; /* Return value */
+
+	buf_offset = 0;
+
+	/*
+	 * Save object using specified method.
+	 */
+	switch(how) {
+	case AS_PER:
+		rval = uper_encode(&asn_DEF_PDU, st, _buf_writer, 0);
+		assert(rval.encoded > 0);
+		fprintf(stderr, "SAVED OBJECT IN SIZE %d\n", buf_offset);
+		return;
+	case AS_DER:
+		rval = der_encode(&asn_DEF_PDU, st,
+			_buf_writer, 0);
+		break;
+	case AS_XER:
+		rval = xer_encode(&asn_DEF_PDU, st, XER_F_BASIC,
+			_buf_writer, 0);
+		break;
+	case AS_CXER:
+		rval = xer_encode(&asn_DEF_PDU, st, XER_F_CANONICAL,
+			_buf_writer, 0);
+		break;
+	}
+
+	if (rval.encoded == -1) {
+		fprintf(stderr,
+			"Cannot encode %s: %s\n",
+			rval.failed_type->name, strerror(errno));
+		assert(rval.encoded != -1);
+		return;
+	}
+
+	fprintf(stderr, "SAVED OBJECT IN SIZE %d\n", buf_offset);
+}
+
+static PDU_t *
+load_object_from(const char *fname, char *fbuf, int size, enum enctype how) {
+	asn_dec_rval_t rval;
+	PDU_t *st = 0;
+	int csize = 1;
+
+	if(getenv("INITIAL_CHUNK_SIZE"))
+		csize = atoi(getenv("INITIAL_CHUNK_SIZE"));
+
+	/* Perform multiple iterations with multiple chunks sizes */
+	for(; csize < 20; csize += 1) {
+		int fbuf_offset = 0;
+		int fbuf_left = size;
+		int fbuf_chunk = csize;
+
+		fprintf(stderr, "LOADING OBJECT OF SIZE %d FROM [%s] as %s,"
+			" chunks %d\n",
+			size, fname, how==AS_PER?"PER":"XER", csize);
+
+		if(st) asn_DEF_PDU.free_struct(&asn_DEF_PDU, st, 0);
+		st = 0;
+
+		do {
+			fprintf(stderr, "Decoding bytes %d..%d (left %d)\n",
+				fbuf_offset,
+					fbuf_chunk < fbuf_left
+						? fbuf_chunk : fbuf_left,
+					fbuf_left);
+			if(st) {
+				fprintf(stderr, "=== currently ===\n");
+				asn_fprint(stderr, &asn_DEF_PDU, st);
+				fprintf(stderr, "=== end ===\n");
+			}
+			switch(how) {
+			case AS_XER:
+				rval = xer_decode(0, &asn_DEF_PDU, (void **)&st,
+					fbuf + fbuf_offset,
+					fbuf_chunk < fbuf_left 
+					? fbuf_chunk : fbuf_left);
+				break;
+			case AS_PER:
+				rval = uper_decode(0, &asn_DEF_PDU,
+					(void **)&st, fbuf + fbuf_offset,
+					fbuf_chunk < fbuf_left 
+					? fbuf_chunk : fbuf_left, 0, 0);
+				if(rval.code == RC_WMORE) {
+					if(fbuf_chunk == fbuf_left) {
+						fprintf(stderr, "-> PER decode error (%d bits of %d bytes) \n", rval.consumed, size);
+						rval.code = RC_FAIL;
+						rval.consumed += 7;
+						rval.consumed /= 8;
+					} else {
+						rval.consumed = 0; /* Not restartable */
+						ASN_STRUCT_FREE(asn_DEF_PDU, st);
+						st = 0;
+						fprintf(stderr, "-> PER wants more\n");
+					}
+				} else {
+					fprintf(stderr, "-> PER ret %d/%d\n",
+						rval.code, rval.consumed);
+					/* uper_decode() returns _bits_ */
+					rval.consumed += 7;
+					rval.consumed /= 8;
+				}
+				break;
+			}
+			fbuf_offset += rval.consumed;
+			fbuf_left -= rval.consumed;
+			if(rval.code == RC_WMORE)
+				fbuf_chunk += 1;	/* Give little more */
+			else
+				fbuf_chunk = csize;	/* Back off */
+		} while(fbuf_left && rval.code == RC_WMORE);
+
+		assert(rval.code == RC_OK);
+		if(how == AS_PER) {
+			fprintf(stderr, "[left %d, off %d, size %d]\n",
+				fbuf_left, fbuf_offset, size);
+			assert(fbuf_offset == size);
+		} else {
+			assert(fbuf_offset - size < 2
+			|| (fbuf_offset + 1 /* "\n" */  == size
+				&& fbuf[size - 1] == '\n')
+			|| (fbuf_offset + 2 /* "\r\n" */  == size
+				&& fbuf[size - 2] == '\r'
+				&& fbuf[size - 1] == '\n')
+			);
+		}
+	}
+
+	if(st) asn_fprint(stderr, &asn_DEF_PDU, st);
+	return st;
+}
+
+static int
+xer_encoding_equal(char *obuf, size_t osize, char *nbuf, size_t nsize) {
+	char *oend = obuf + osize;
+	char *nend = nbuf + nsize;
+
+	if((osize && !nsize) || (!osize && nsize))
+		return 0;	/* not equal apriori */
+
+	while(1) {
+		while(obuf < oend && isspace(*obuf)) obuf++;
+		while(nbuf < nend && isspace(*nbuf)) nbuf++;
+
+		if(obuf == oend || nbuf == nend) {
+			if(obuf == oend && nbuf == nend)
+				break;
+			fprintf(stderr, "%s data in reconstructed encoding\n",
+				(obuf == oend) ? "More" : "Less");
+			return 0;
+		}
+
+		if(*obuf != *nbuf) {
+			printf("%c%c != %c%c\n",
+				obuf[0], obuf[1],
+				nbuf[0], nbuf[1]);
+			return 0;
+		}
+		obuf++, nbuf++;
+	}
+
+	return 1;
+}
+
+static void
+process_XER_data(const char *fname, char *fbuf, int size) {
+	PDU_t *st;
+	int ret;
+
+	st = load_object_from(fname, fbuf, size, AS_XER);
+	if(!st) return;
+
+	/* Save and re-load as DER */
+	save_object_as(st, AS_PER);
+	st = load_object_from("buffer", buf, buf_offset, AS_PER);
+	assert(st);
+
+	save_object_as(st, AS_XER);
+	fprintf(stderr, "=== original ===\n");
+	fwrite(fbuf, 1, size, stderr);
+	fprintf(stderr, "=== re-encoded ===\n");
+	fwrite(buf, 1, buf_offset, stderr);
+	fprintf(stderr, "=== end ===\n");
+
+	assert(xer_encoding_equal(fbuf, size, buf, buf_offset));
+
+	asn_DEF_PDU.free_struct(&asn_DEF_PDU, st, 0);
+}
+
+/*
+ * Decode the .der files and try to regenerate them.
+ */
+static int
+process(const char *fname) {
+	char fbuf[4096];
+	char *ext = strrchr(fname, '.');
+	int ret;
+	int rd;
+	FILE *fp;
+
+	if(ext == 0 || strcmp(ext, ".in"))
+		return 0;
+
+	fprintf(stderr, "\nProcessing file [../%s]\n", fname);
+
+	snprintf(fbuf, sizeof(fbuf), "../data-126/%s", fname);
+	fp = fopen(fbuf, "r");
+	assert(fp);
+
+	rd = fread(fbuf, 1, sizeof(fbuf), fp);
+	fclose(fp);
+
+	assert(rd < sizeof(fbuf));	/* expect small files */
+
+	process_XER_data(fname, fbuf, rd);
+
+	fprintf(stderr, "Finished [%s]\n", fname);
+
+	return 1;
+}
+
+int
+main() {
+	DIR *dir;
+	struct dirent *dent;
+	int processed_files = 0;
+	char *str;
+
+	/* Process a specific test file */
+	str = getenv("DATA_126_FILE");
+	if(str && strncmp(str, "data-126-", 9) == 0) {
+		process(str);
+		return 0;
+	}
+
+	dir = opendir("../data-126");
+	assert(dir);
+
+	/*
+	 * Process each file in that directory.
+	 */
+	while((dent = readdir(dir))) {
+		if(strncmp(dent->d_name, "data-126-", 9) == 0)
+			if(process(dent->d_name))
+				processed_files++;
+	}
+
+	assert(processed_files);
+	closedir(dir);
+
+	return 0;
+}
+

asn1c/tests/data-126/README

+Mode of operation:
+
+	Each of the *.in files is XER-decoded, then converted into PER,
+	then compared with the .out file, then decoded back into XER
+	and compared to the original .in file content.
+

asn1c/tests/data-126/data-126-01.in

+<PDU>
+	<str-m></str-m>
+</PDU>