| #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 <assert.h> |
| #include <errno.h> |
| |
| #include <T.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_RECLESS, /* Reconstruction is allowed to yield less data */ |
| 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; |
| printf("=> ["); |
| for(; b < bend; b++) |
| printf(" %02X", *b); |
| printf("]:%zd\n", size); |
| buf_offset += size; |
| return 0; |
| } |
| |
| static int |
| save_object(T_t *st) { |
| asn_enc_rval_t rval; /* Return value */ |
| |
| buf_offset = 0; |
| |
| rval = der_encode(&asn_DEF_T, 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 -1; /* JIC */ |
| } |
| |
| fprintf(stderr, "SAVED OBJECT IN SIZE %d\n", buf_offset); |
| |
| return 0; |
| } |
| |
| static T_t * |
| load_object(enum expectation expectation, unsigned char *fbuf, size_t size) { |
| asn_dec_rval_t rval; |
| T_t *st = 0; |
| int csize; |
| |
| fprintf(stderr, "LOADING OBJECT OF SIZE %d\n", (int)size); |
| |
| /* Perform multiple iterations with multiple chunks sizes */ |
| for(csize = 1; csize < 20; csize += 1) { |
| int fbuf_offset = 0; |
| int fbuf_left = size; |
| int fbuf_chunk = csize; |
| |
| if(st) ASN_STRUCT_FREE(asn_DEF_T, st); |
| st = 0; |
| |
| do { |
| fprintf(stderr, "Decoding from %d with %d (left %d)\n", |
| fbuf_offset, fbuf_chunk, fbuf_left); |
| rval = ber_decode(0, &asn_DEF_T, (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); |
| assert(fbuf_offset == (ssize_t)size); |
| } else { |
| assert(rval.code != RC_OK); |
| fprintf(stderr, "Failed, but this was expected\n"); |
| ASN_STRUCT_FREE(asn_DEF_T, st); |
| st = 0; /* ignore leak for now */ |
| } |
| } |
| |
| if(st) asn_fprint(stderr, &asn_DEF_T, st); |
| return st; |
| } |
| |
| |
| static void |
| process_data(enum expectation expectation, unsigned char *fbuf, ssize_t size) { |
| T_t *st; |
| int ret; |
| |
| st = load_object(expectation, fbuf, size); |
| if(!st) return; |
| |
| ret = save_object(st); |
| assert(buf_offset < (ssize_t)sizeof(buf)); |
| assert(ret == 0); |
| |
| switch(expectation) { |
| case EXP_RECLESS: |
| assert(buf_offset > 0 && buf_offset < size); |
| assert(memcmp(buf + 2, fbuf + 2, buf_offset - 2) == 0); |
| break; |
| case EXP_DIFFERENT: |
| assert(buf_offset > 0 && buf_offset < size); |
| break; |
| case EXP_BROKEN: |
| assert(buf_offset != size |
| || memcmp(buf, fbuf, buf_offset)); |
| break; |
| case EXP_OK: |
| assert(buf_offset == (ssize_t)size); |
| assert(memcmp(buf, fbuf, buf_offset) == 0); |
| break; |
| } |
| |
| ASN_STRUCT_FREE(asn_DEF_T, 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, ".ber")) |
| 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 'L': /* Extensions are present */ |
| expectation = EXP_RECLESS; break; |
| default: |
| expectation = EXP_OK; break; |
| } |
| |
| fprintf(stderr, "\nProcessing file [../%s]\n", fname); |
| |
| getcwd(prevdir, sizeof(prevdir)); |
| ret = chdir(SRCDIR_S "/data-62"); |
| 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 < (ssize_t)sizeof(fbuf)); /* expect small files */ |
| |
| process_data(expectation, fbuf, rd); |
| |
| return 1; |
| } |
| |
| int |
| main() { |
| DIR *dir; |
| struct dirent *dent; |
| int processed_files = 0; |
| char *str; |
| |
| dir = opendir(SRCDIR_S "/data-62"); |
| assert(dir); |
| |
| str = getenv("DATA_62_FILE"); |
| if(str && strncmp(str, "data-62-", 8) == 0) |
| process(str); |
| |
| while((dent = readdir(dir))) { |
| if(strncmp(dent->d_name, "data-62-", 8) == 0) |
| if(process(dent->d_name)) |
| processed_files++; |
| } |
| |
| assert(processed_files); |
| closedir(dir); |
| |
| return 0; |
| } |
| |