| /* |
| * Mode of operation: |
| * Each of the *.in files is XER-decoded, then converted into DER, |
| * then decoded from DER and encoded into XER again. The resulting |
| * stream is compared with the corresponding .out file. |
| */ |
| #undef NDEBUG |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <unistd.h> /* for chdir(2), getcwd(3) */ |
| #include <string.h> |
| #include <dirent.h> |
| #include <ctype.h> /* for isspace(3) */ |
| #include <assert.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_BROKEN, /* Decoding must fail */ |
| EXP_DIFFERENT, /* Reconstruction will yield different encoding */ |
| }; |
| |
| 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++) |
| fprintf(stderr, "%c", *b); |
| fprintf(stderr, "]:%zd\n", size); |
| buf_offset += size; |
| return 0; |
| } |
| |
| static void |
| save_object_as(PDU_t *st, enum asn_transfer_syntax syntax) { |
| asn_enc_rval_t rval; /* Return value */ |
| |
| buf_offset = 0; |
| |
| rval = asn_encode(0, syntax, &asn_DEF_PDU, st, _buf_writer, 0); |
| |
| 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/%zu\n", buf_offset, rval.encoded); |
| |
| assert(buf_offset == rval.encoded); |
| } |
| |
| static PDU_t * |
| load_object_from(enum expectation expectation, unsigned char *fbuf, size_t size, enum asn_transfer_syntax syntax) { |
| 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, chunks %zd\n", |
| size, 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 |
| rval = asn_decode(0, syntax, &asn_DEF_PDU, (void **)&st, |
| fbuf + fbuf_offset, |
| fbuf_chunk < fbuf_left |
| ? fbuf_chunk : fbuf_left); |
| 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(syntax == ATS_BER) { |
| 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(enum expectation expectation, unsigned char *fbuf, size_t size) { |
| PDU_t *st; |
| |
| st = load_object_from(expectation, fbuf, size, ATS_BASIC_XER); |
| if(!st) return; |
| |
| /* Save and re-load as DER */ |
| save_object_as(st, ATS_DER); |
| st = load_object_from(expectation, buf, buf_offset, ATS_BER); |
| assert(st); |
| |
| save_object_as(st, ATS_BASIC_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_OK: |
| 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) { |
| char prevdir[256]; |
| unsigned char fbuf[4096]; |
| char *ext = strrchr(fname, '.'); |
| enum expectation expectation; |
| int ret; |
| 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 'X': |
| case 'D': /* Reconstructing should yield different data */ |
| expectation = EXP_DIFFERENT; break; |
| case 'E': |
| default: |
| expectation = EXP_OK; break; |
| } |
| |
| fprintf(stderr, "\nProcessing file [../%s]\n", fname); |
| |
| getcwd(prevdir, sizeof(prevdir)); |
| ret = chdir(SRCDIR_S "/data-70"); |
| assert(ret == 0); |
| fp = fopen(fname, "r"); |
| ret = chdir(prevdir); |
| assert(ret == 0); |
| assert(fp); |
| |
| rd = fread(fbuf, 1, sizeof(fbuf), fp); |
| fclose(fp); |
| |
| assert(rd > 0 && (size_t)rd < sizeof(fbuf)); /* expect small files */ |
| |
| process_XER_data(expectation, fbuf, rd); |
| |
| return 1; |
| } |
| |
| #ifdef ENABLE_LIBFUZZER |
| |
| int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { |
| PDU_t *st = 0; |
| asn_dec_rval_t rval; |
| rval = asn_decode(0, ATS_BASIC_XER, &asn_DEF_PDU, (void **)&st, Data, Size); |
| assert(rval.consumed <= Size); |
| ASN_STRUCT_FREE(asn_DEF_PDU, st); |
| return 0; |
| } |
| |
| #else |
| |
| int |
| main() { |
| DIR *dir; |
| struct dirent *dent; |
| int processed_files = 0; |
| char *str; |
| |
| /* Process a specific test file */ |
| str = getenv("DATA_70_FILE"); |
| if(str && strncmp(str, "data-70-", 8) == 0) |
| process(str); |
| |
| dir = opendir(SRCDIR_S "/data-70"); |
| assert(dir); |
| |
| /* |
| * Process each file in that directory. |
| */ |
| while((dent = readdir(dir))) { |
| if(strncmp(dent->d_name, "data-70-", 8) == 0) |
| if(process(dent->d_name)) |
| processed_files++; |
| } |
| |
| assert(processed_files); |
| closedir(dir); |
| |
| return 0; |
| } |
| |
| #endif |