mirror of https://gerrit.osmocom.org/asn1c
364 lines
8.5 KiB
C
364 lines
8.5 KiB
C
/*
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* Mode of operation:
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* Each of the *.in files is XER-decoded, then converted into DER,
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* then decoded from DER and encoded into XER again. The resulting
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* stream is compared with the corresponding .out file.
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*/
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#undef NDEBUG
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h> /* for chdir(2) */
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#include <string.h>
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#include <dirent.h>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <PDU.h>
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enum expectation {
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EXP_OK, /* Encoding/decoding must succeed */
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EXP_CXER_EXACT, /* Encoding/decoding using CXER must be exact */
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EXP_CXER_DIFF, /* Encoding/decoding using CXER must be different */
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EXP_BROKEN, /* Decoding must fail */
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EXP_DIFFERENT, /* Reconstruction will yield different encoding */
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EXP_PER_NOCOMP, /* Not PER compatible */
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};
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static unsigned char buf[4096];
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static int buf_offset;
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static int
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_buf_writer(const void *buffer, size_t size, void *app_key) {
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unsigned char *b, *bend;
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(void)app_key;
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assert(buf_offset + size < sizeof(buf));
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memcpy(buf + buf_offset, buffer, size);
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b = buf + buf_offset;
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bend = b + size;
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fprintf(stderr, "=> [");
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for(; b < bend; b++) {
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if(*b >= 32 && *b < 127 && *b != '%')
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fprintf(stderr, "%c", *b);
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else
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fprintf(stderr, "%%%02x", *b);
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}
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fprintf(stderr, "]:%ld\n", (long)size);
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buf_offset += size;
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return 0;
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}
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enum enctype {
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AS_PER,
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AS_DER,
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AS_XER,
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AS_CXER,
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};
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static void
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save_object_as(PDU_t *st, enum expectation exp, enum enctype how) {
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asn_enc_rval_t rval; /* Return value */
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buf_offset = 0;
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/*
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* Save object using specified method.
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*/
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switch(how) {
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case AS_PER:
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rval = uper_encode(&asn_DEF_PDU, st,
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_buf_writer, 0);
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if(exp == EXP_PER_NOCOMP)
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assert(rval.encoded == -1);
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else
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assert(rval.encoded > 0);
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fprintf(stderr, "SAVED OBJECT IN SIZE %d\n", buf_offset);
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return;
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case AS_DER:
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rval = der_encode(&asn_DEF_PDU, st,
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_buf_writer, 0);
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break;
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case AS_XER:
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rval = xer_encode(&asn_DEF_PDU, st, XER_F_BASIC,
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_buf_writer, 0);
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break;
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case AS_CXER:
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rval = xer_encode(&asn_DEF_PDU, st, XER_F_CANONICAL,
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_buf_writer, 0);
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break;
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}
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if (rval.encoded == -1) {
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fprintf(stderr,
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"Cannot encode %s: %s\n",
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rval.failed_type->name, strerror(errno));
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assert(rval.encoded != -1);
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return;
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}
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fprintf(stderr, "SAVED OBJECT IN SIZE %d\n", buf_offset);
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}
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static PDU_t *
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load_object_from(const char *fname, enum expectation expectation, char *fbuf, int size, enum enctype how) {
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asn_dec_rval_t rval;
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PDU_t *st = 0;
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int csize = 1;
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if(getenv("INITIAL_CHUNK_SIZE"))
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csize = atoi(getenv("INITIAL_CHUNK_SIZE"));
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/* Perform multiple iterations with multiple chunks sizes */
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for(; csize < 20; csize += 1) {
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int fbuf_offset = 0;
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int fbuf_left = size;
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int fbuf_chunk = csize;
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fprintf(stderr, "LOADING OBJECT OF SIZE %d FROM [%s] as %s,"
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" chunks %d\n",
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size, fname, how==AS_PER?"PER":"XER", csize);
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if(st) asn_DEF_PDU.free_struct(&asn_DEF_PDU, st, 0);
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st = 0;
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do {
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fprintf(stderr, "Decoding bytes %d..%d (left %d)\n",
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fbuf_offset,
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fbuf_chunk < fbuf_left
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? fbuf_chunk : fbuf_left,
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fbuf_left);
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if(st) {
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fprintf(stderr, "=== currently ===\n");
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asn_fprint(stderr, &asn_DEF_PDU, st);
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fprintf(stderr, "=== end ===\n");
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}
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switch(how) {
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case AS_XER:
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rval = xer_decode(0, &asn_DEF_PDU, (void **)&st,
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fbuf + fbuf_offset,
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fbuf_chunk < fbuf_left
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? fbuf_chunk : fbuf_left);
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break;
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case AS_PER:
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rval = uper_decode(0, &asn_DEF_PDU,
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(void **)&st, fbuf + fbuf_offset,
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fbuf_chunk < fbuf_left
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? fbuf_chunk : fbuf_left, 0, 0);
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if(rval.code == RC_WMORE) {
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rval.consumed = 0; /* Not restartable */
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ASN_STRUCT_FREE(asn_DEF_PDU, st);
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st = 0;
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fprintf(stderr, "-> PER wants more\n");
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} else {
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fprintf(stderr, "-> PER ret %d/%d\n",
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rval.code, rval.consumed);
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/* uper_decode() returns _bits_ */
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rval.consumed += 7;
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rval.consumed /= 8;
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}
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break;
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}
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fbuf_offset += rval.consumed;
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fbuf_left -= rval.consumed;
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if(rval.code == RC_WMORE)
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fbuf_chunk += 1; /* Give little more */
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else
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fbuf_chunk = csize; /* Back off */
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} while(fbuf_left && rval.code == RC_WMORE);
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if(expectation != EXP_BROKEN) {
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assert(rval.code == RC_OK);
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if(how == AS_PER) {
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fprintf(stderr, "[left %d, off %d, size %d]\n",
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fbuf_left, fbuf_offset, size);
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assert(fbuf_offset == size);
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} else {
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assert(fbuf_offset - size < 2
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|| (fbuf_offset + 1 /* "\n" */ == size
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&& fbuf[size - 1] == '\n')
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|| (fbuf_offset + 2 /* "\r\n" */ == size
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&& fbuf[size - 2] == '\r'
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&& fbuf[size - 1] == '\n')
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);
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}
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} else {
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assert(rval.code != RC_OK);
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fprintf(stderr, "Failed, but this was expected\n");
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asn_DEF_PDU.free_struct(&asn_DEF_PDU, st, 0);
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st = 0; /* ignore leak for now */
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}
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}
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if(st) asn_fprint(stderr, &asn_DEF_PDU, st);
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return st;
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}
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static int
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xer_encoding_equal(char *obuf, size_t osize, char *nbuf, size_t nsize) {
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char *oend = obuf + osize;
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char *nend = nbuf + nsize;
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if((osize && !nsize) || (!osize && nsize))
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return 0; /* not equal apriori */
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while(1) {
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while(obuf < oend && isspace(*obuf)) obuf++;
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while(nbuf < nend && isspace(*nbuf)) nbuf++;
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if(obuf == oend || nbuf == nend) {
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if(obuf == oend && nbuf == nend)
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break;
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fprintf(stderr, "%s data in reconstructed encoding\n",
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(obuf == oend) ? "More" : "Less");
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return 0;
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}
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if(*obuf != *nbuf) {
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printf("%c%c != %c%c\n",
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obuf[0], obuf[1],
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nbuf[0], nbuf[1]);
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return 0;
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}
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obuf++, nbuf++;
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}
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return 1;
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}
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static void
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process_XER_data(const char *fname, enum expectation expectation, char *fbuf, int size) {
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PDU_t *st;
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int ret;
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st = load_object_from(fname, expectation, fbuf, size, AS_XER);
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if(!st) return;
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/* Save and re-load as DER */
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save_object_as(st, expectation, AS_PER);
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if(expectation == EXP_PER_NOCOMP)
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return; /* Already checked */
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st = load_object_from("buffer", expectation, buf, buf_offset, AS_PER);
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assert(st);
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save_object_as(st,
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expectation,
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(expectation == EXP_CXER_EXACT
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|| expectation == EXP_CXER_DIFF)
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? AS_CXER : AS_XER);
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fprintf(stderr, "=== original ===\n");
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fwrite(fbuf, 1, size, stderr);
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fprintf(stderr, "=== re-encoded ===\n");
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fwrite(buf, 1, buf_offset, stderr);
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fprintf(stderr, "=== end ===\n");
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switch(expectation) {
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case EXP_DIFFERENT:
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assert(!xer_encoding_equal(fbuf, size, buf, buf_offset));
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break;
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case EXP_BROKEN:
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assert(!xer_encoding_equal(fbuf, size, buf, buf_offset));
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break;
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case EXP_CXER_EXACT:
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buf[buf_offset++] = '\n';
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assert(size == buf_offset);
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assert(memcmp(fbuf, buf, size) == 0);
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break;
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case EXP_CXER_DIFF:
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buf[buf_offset++] = '\n';
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assert(size != buf_offset
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|| memcmp(fbuf, buf, size));
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break;
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case EXP_OK:
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case EXP_PER_NOCOMP:
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assert(xer_encoding_equal(fbuf, size, buf, buf_offset));
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break;
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}
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asn_DEF_PDU.free_struct(&asn_DEF_PDU, st, 0);
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}
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/*
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* Decode the .der files and try to regenerate them.
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*/
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static int
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process(const char *fname) {
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char fbuf[4096];
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char *ext = strrchr(fname, '.');
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enum expectation expectation;
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int ret;
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int rd;
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FILE *fp;
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if(ext == 0 || strcmp(ext, ".in"))
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return 0;
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switch(ext[-1]) {
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case 'B': /* The file is intentionally broken */
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expectation = EXP_BROKEN; break;
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case 'D': /* Reconstructing should yield different data */
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expectation = EXP_DIFFERENT; break;
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case 'E': /* Byte to byte exact reconstruction */
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expectation = EXP_CXER_EXACT; break;
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case 'X': /* Should fail byte-to-byte comparison */
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expectation = EXP_CXER_DIFF; break;
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case 'P': /* Incompatible with PER */
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expectation = EXP_PER_NOCOMP; break;
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default:
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expectation = EXP_OK; break;
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}
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fprintf(stderr, "\nProcessing file [../%s]\n", fname);
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ret = chdir("../data-119");
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assert(ret == 0);
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fp = fopen(fname, "r");
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ret = chdir("../test-check-119.-gen-PER");
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assert(ret == 0);
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assert(fp);
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rd = fread(fbuf, 1, sizeof(fbuf), fp);
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fclose(fp);
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assert(rd < sizeof(fbuf)); /* expect small files */
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process_XER_data(fname, expectation, fbuf, rd);
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fprintf(stderr, "Finished [%s]\n", fname);
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return 1;
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}
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int
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main() {
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DIR *dir;
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struct dirent *dent;
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int processed_files = 0;
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char *str;
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/* Process a specific test file */
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str = getenv("DATA_119_FILE");
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if(str && strncmp(str, "data-119-", 9) == 0) {
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process(str);
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return 0;
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}
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dir = opendir("../data-119");
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assert(dir);
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/*
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* Process each file in that directory.
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*/
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while((dent = readdir(dir))) {
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if(strncmp(dent->d_name, "data-119-", 9) == 0)
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if(process(dent->d_name))
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processed_files++;
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}
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assert(processed_files);
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closedir(dir);
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return 0;
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}
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