| /* |
| * Mode of operation: |
| * Each of the *.in files is XER-decoded, then converted into PER, |
| * then decoded back from PER, then encoded into XER again, |
| * and finally compared to the original encoding. |
| */ |
| #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> |
| |
| #ifndef SRCDIR |
| #define SRCDIR_S ".." |
| #else |
| #define STRINGIFY_MACRO2(x) #x |
| #define STRINGIFY_MACRO(x) STRINGIFY_MACRO2(x) |
| #define SRCDIR_S STRINGIFY_MACRO(SRCDIR) |
| #endif |
| |
| enum expectation { |
| EXP_OK, /* Encoding/decoding must succeed */ |
| EXP_CXER_EXACT, /* Encoding/decoding using CXER must be exact */ |
| EXP_CXER_DIFF, /* Encoding/decoding using CXER must be different */ |
| EXP_BROKEN, /* Decoding must fail */ |
| EXP_DIFFERENT, /* Reconstruction will yield different encoding */ |
| EXP_PER_NOCOMP, /* Not PER compatible */ |
| }; |
| |
| static unsigned char buf[4096]; |
| static size_t 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; |
| #ifdef EMIT_ASN_DEBUG |
| fprintf(stderr, "=> ["); |
| for(; b < bend; b++) { |
| if(*b >= 32 && *b < 127 && *b != '%') |
| fprintf(stderr, "%c", *b); |
| else |
| fprintf(stderr, "%%%02x", *b); |
| } |
| fprintf(stderr, "]:%zd\n", size); |
| #endif |
| buf_offset += size; |
| return 0; |
| } |
| |
| enum enctype { |
| AS_PER, |
| AS_DER, |
| AS_XER, |
| AS_CXER, |
| }; |
| |
| static void |
| save_object_as(PDU_t *st, enum expectation exp, 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); |
| if(exp == EXP_PER_NOCOMP) |
| assert(rval.encoded == -1); |
| else |
| assert(rval.encoded > 0); |
| fprintf(stderr, "SAVED OBJECT IN SIZE %zd\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 %zd\n", buf_offset); |
| } |
| |
| static PDU_t * |
| load_object_from(const char *fname, enum expectation expectation, unsigned char *fbuf, size_t size, enum enctype how) { |
| asn_dec_rval_t rval; |
| PDU_t *st = 0; |
| size_t 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 %zd FROM [%s] as %s," |
| " chunks %zd\n", |
| size, fname, how==AS_PER?"PER":"XER", csize); |
| |
| if(st) ASN_STRUCT_FREE(asn_DEF_PDU, st); |
| st = 0; |
| |
| do { |
| ASN_DEBUG("Decoding bytes %d..%d (left %d)", |
| fbuf_offset, |
| fbuf_chunk < fbuf_left |
| ? fbuf_chunk : fbuf_left, |
| fbuf_left); |
| #ifdef EMIT_ASN_DEBUG |
| if(st) { |
| fprintf(stderr, "=== currently ===\n"); |
| asn_fprint(stderr, &asn_DEF_PDU, st); |
| fprintf(stderr, "=== end ===\n"); |
| } |
| #endif |
| 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) { |
| rval.consumed = 0; /* Not restartable */ |
| ASN_STRUCT_FREE(asn_DEF_PDU, st); |
| st = 0; |
| ASN_DEBUG("-> PER wants more"); |
| } else { |
| ASN_DEBUG("-> PER ret %d/%zd", |
| rval.code, rval.consumed); |
| /* uper_decode() returns _bits_ */ |
| rval.consumed += 7; |
| rval.consumed /= 8; |
| } |
| break; |
| case AS_DER: |
| case AS_CXER: |
| assert(!"Unexpected DER or CXER load request"); |
| } |
| 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); |
| |
| if(expectation != EXP_BROKEN) { |
| assert(rval.code == RC_OK); |
| if(how == AS_PER) { |
| fprintf(stderr, "[left %d, off %d, size %zd]\n", |
| fbuf_left, fbuf_offset, size); |
| assert(fbuf_offset == (ssize_t)size); |
| } else { |
| assert((fbuf_offset + 1 /* "\n" */ == (ssize_t)size |
| && fbuf[size - 1] == '\n') |
| || (fbuf_offset + 2 /* "\r\n" */ == (ssize_t)size |
| && fbuf[size - 2] == '\r' |
| && fbuf[size - 1] == '\n') |
| ); |
| } |
| } else { |
| assert(rval.code != RC_OK); |
| fprintf(stderr, "Failed, but this was expected\n"); |
| ASN_STRUCT_FREE(asn_DEF_PDU, st); |
| st = 0; /* ignore leak for now */ |
| } |
| } |
| |
| if(st) asn_fprint(stderr, &asn_DEF_PDU, st); |
| return st; |
| } |
| |
| static int |
| xer_encoding_equal(void *obufp, size_t osize, void *nbufp, size_t nsize) { |
| char *obuf = obufp; |
| char *nbuf = nbufp; |
| 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, enum expectation expectation, unsigned char *fbuf, ssize_t size) { |
| PDU_t *st; |
| |
| st = load_object_from(fname, expectation, fbuf, size, AS_XER); |
| if(!st) return; |
| |
| /* Save and re-load as PER */ |
| save_object_as(st, expectation, AS_PER); |
| if(expectation == EXP_PER_NOCOMP) |
| return; /* Already checked */ |
| st = load_object_from("buffer", expectation, buf, buf_offset, AS_PER); |
| assert(st); |
| |
| save_object_as(st, |
| expectation, |
| (expectation == EXP_CXER_EXACT |
| || expectation == EXP_CXER_DIFF) |
| ? AS_CXER : 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"); |
| |
| switch(expectation) { |
| case EXP_DIFFERENT: |
| assert(!xer_encoding_equal(fbuf, size, buf, buf_offset)); |
| break; |
| case EXP_BROKEN: |
| assert(!xer_encoding_equal(fbuf, size, buf, buf_offset)); |
| break; |
| case EXP_CXER_EXACT: |
| buf[buf_offset++] = '\n'; |
| assert((ssize_t)size == (ssize_t)buf_offset); |
| assert(memcmp(fbuf, buf, size) == 0); |
| break; |
| case EXP_CXER_DIFF: |
| buf[buf_offset++] = '\n'; |
| assert((ssize_t)size != (ssize_t)buf_offset |
| || memcmp(fbuf, buf, size)); |
| break; |
| case EXP_OK: |
| case EXP_PER_NOCOMP: |
| assert(xer_encoding_equal(fbuf, size, buf, buf_offset)); |
| break; |
| } |
| |
| ASN_STRUCT_FREE(asn_DEF_PDU, st); |
| } |
| |
| /* |
| * Decode the .der files and try to regenerate them. |
| */ |
| static int |
| process(const char *fname) { |
| unsigned char fbuf[4096]; |
| char *ext = strrchr(fname, '.'); |
| enum expectation expectation; |
| int rd; |
| FILE *fp; |
| |
| if(ext == 0 || strcmp(ext, ".in")) |
| return 0; |
| |
| switch(ext[-1]) { |
| case 'B': /* The file is intentionally broken */ |
| expectation = EXP_BROKEN; break; |
| case 'D': /* Reconstructing should yield different data */ |
| expectation = EXP_DIFFERENT; break; |
| case 'E': /* Byte to byte exact reconstruction */ |
| expectation = EXP_CXER_EXACT; break; |
| case 'X': /* Should fail byte-to-byte comparison */ |
| expectation = EXP_CXER_DIFF; break; |
| case 'P': /* Incompatible with PER */ |
| expectation = EXP_PER_NOCOMP; break; |
| default: |
| expectation = EXP_OK; break; |
| } |
| |
| fprintf(stderr, "\nProcessing file [../%s]\n", fname); |
| |
| snprintf((char *)fbuf, sizeof(fbuf), SRCDIR_S "/data-119/%s", fname); |
| fp = fopen((char *)fbuf, "r"); |
| assert(fp); |
| |
| rd = fread(fbuf, 1, sizeof(fbuf), fp); |
| fclose(fp); |
| |
| assert(rd < (ssize_t)sizeof(fbuf)); /* expect small files */ |
| |
| process_XER_data(fname, expectation, 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_119_FILE"); |
| if(str && strncmp(str, "data-119-", 9) == 0) { |
| process(str); |
| return 0; |
| } |
| |
| dir = opendir(SRCDIR_S "/data-119"); |
| assert(dir); |
| |
| /* |
| * Process each file in that directory. |
| */ |
| while((dent = readdir(dir))) { |
| if(strncmp(dent->d_name, "data-119-", 9) == 0) |
| if(process(dent->d_name)) |
| processed_files++; |
| } |
| |
| assert(processed_files); |
| closedir(dir); |
| |
| return 0; |
| } |
| |