mirror of https://gerrit.osmocom.org/asn1c
999 lines
32 KiB
C
999 lines
32 KiB
C
/*
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* Generic converter template for a selected ASN.1 type.
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* Copyright (c) 2005-2017 Lev Walkin <vlm@lionet.info>.
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* All rights reserved.
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*
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* To compile with your own ASN.1 type, redefine the PDU as shown:
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*
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* cc -DPDU=MyCustomType -o myDecoder.o -c converter-example.c
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#define __EXTENSIONS__
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#include <stdio.h>
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#include <sys/types.h>
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#include <stdlib.h> /* for atoi(3) */
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#include <getopt.h> /* for getopt(3) */
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#include <string.h> /* for strerror(3) */
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#include <sysexits.h> /* for EX_* exit codes */
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#include <errno.h> /* for errno */
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#include <unistd.h> /* for isatty(3) */
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#include <asn_application.h>
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#include <asn_internal.h> /* for ASN__DEFAULT_STACK_MAX */
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/* Convert "Type" defined by -DPDU into "asn_DEF_Type" */
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#ifndef NO_ASN_PDU
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#ifndef PDU
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#error Define -DPDU to compile this sample converter.
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#endif
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#ifdef ASN_PDU_COLLECTION /* Generated by asn1c: -pdu=... */
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extern asn_TYPE_descriptor_t *asn_pdu_collection[];
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#endif
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#define ASN_DEF_PDU(t) asn_DEF_ ## t
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#define DEF_PDU_Type(t) ASN_DEF_PDU(t)
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#define PDU_Type DEF_PDU_Type(PDU)
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extern asn_TYPE_descriptor_t PDU_Type; /* ASN.1 type to be decoded */
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#define PDU_Type_Ptr (&PDU_Type)
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#else /* NO_ASN_PDU */
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#define PDU_Type_Ptr NULL
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#endif /* NO_ASN_PDU */
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/*
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* Open file and parse its contens.
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*/
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static void *data_decode_from_file(enum asn_transfer_syntax,
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asn_TYPE_descriptor_t *asnTypeOfPDU,
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FILE *file, const char *name,
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ssize_t suggested_bufsize, int first_pdu);
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static int write_out(const void *buffer, size_t size, void *key);
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static FILE *argument_to_file(char *av[], int idx);
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static char *argument_to_name(char *av[], int idx);
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int opt_debug; /* -d (or -dd) */
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static int opt_check; /* -c (constraints checking) */
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static int opt_stack; /* -s (maximum stack size) */
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static int opt_nopad; /* -per-nopad (PER input is not padded between msgs) */
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static int opt_onepdu; /* -1 (decode single PDU) */
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#ifdef JUNKTEST /* Enable -J <probability> */
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#define JUNKOPT "J:"
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static double opt_jprob; /* Junk bit probability */
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static int junk_failures;
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static void junk_bytes_with_probability(uint8_t *, size_t, double prob);
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#define RANDOPT "R:"
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static ssize_t random_max_size = 0; /* Size of the random data */
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#if !defined(__FreeBSD__) && !(defined(__APPLE__) && defined(__MACH__))
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static void
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srandomdev(void) {
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FILE *f = fopen("/dev/urandom", "rb");
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unsigned seed;
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if(f) {
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if(fread(&seed, 1, sizeof(seed), f) != sizeof(seed)) {
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seed = time(NULL);
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}
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fclose(f);
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} else {
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seed = time(NULL);
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}
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srandom(seed);
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}
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#endif
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#else /* !JUNKTEST */
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#define JUNKOPT
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#define RANDOPT
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#endif /* JUNKTEST */
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/* Debug output function */
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static void CC_PRINTFLIKE(1, 2)
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DEBUG(const char *fmt, ...) {
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va_list ap;
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if(!opt_debug) return;
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fprintf(stderr, "AD: ");
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fprintf(stderr, "\n");
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}
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static const char *
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ats_simple_name(enum asn_transfer_syntax syntax) {
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switch(syntax) {
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case ATS_INVALID:
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return "/dev/null";
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case ATS_NONSTANDARD_PLAINTEXT:
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return "plaintext";
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case ATS_BER:
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return "BER";
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case ATS_DER:
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return "DER";
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case ATS_CER:
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return "CER";
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case ATS_BASIC_OER:
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case ATS_CANONICAL_OER:
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return "OER";
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case ATS_BASIC_XER:
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case ATS_CANONICAL_XER:
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return "XER";
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case ATS_UNALIGNED_BASIC_PER:
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case ATS_UNALIGNED_CANONICAL_PER:
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return "PER";
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default:
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return "<?>";
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}
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}
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#define CODEC_OFFSET(fname) ((ptrdiff_t)&(((asn_TYPE_operation_t *)0)->fname))
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typedef struct {
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const char *name;
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enum asn_transfer_syntax syntax;
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ptrdiff_t codec_offset;
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const char *full_name;
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} syntax_selector;
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static syntax_selector input_encodings[] = {
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{"ber", ATS_BER, CODEC_OFFSET(ber_decoder),
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"Input is in BER (Basic Encoding Rules) or DER"},
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{"oer", ATS_BASIC_OER, CODEC_OFFSET(oer_decoder),
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"Input is in OER (Octet Encoding Rules)"},
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{"per", ATS_UNALIGNED_BASIC_PER, CODEC_OFFSET(uper_decoder),
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"Input is in Unaligned PER (Packed Encoding Rules)"},
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{"xer", ATS_BASIC_XER, CODEC_OFFSET(xer_decoder),
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"Input is in XER (XML Encoding Rules)"},
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{0, ATS_INVALID, 0, 0}};
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static syntax_selector output_encodings[] = {
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{"der", ATS_DER, CODEC_OFFSET(der_encoder),
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"Output as DER (Distinguished Encoding Rules)"},
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{"oer", ATS_CANONICAL_OER, CODEC_OFFSET(oer_encoder),
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"Output as Canonical OER (Octet Encoding Rules)"},
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{"per", ATS_UNALIGNED_CANONICAL_PER, CODEC_OFFSET(uper_encoder),
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"Output as Unaligned PER (Packed Encoding Rules)"},
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{"xer", ATS_BASIC_XER, CODEC_OFFSET(xer_encoder),
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"Output as XER (XML Encoding Rules)"},
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{"text", ATS_NONSTANDARD_PLAINTEXT, CODEC_OFFSET(print_struct),
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"Output as plain semi-structured text"},
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{"null", ATS_INVALID, CODEC_OFFSET(print_struct),
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"Verify (decode) input, but do not output"},
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{0, ATS_INVALID, 0, 0}};
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static int
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has_codec_defined(const asn_TYPE_descriptor_t *td,
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const syntax_selector *element) {
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return *(const void *const *)(const void *)((const char *)td->op
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+ element->codec_offset) != 0;
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}
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/*
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* Select ASN.1 Transfer Enocoding Syntax by command line name.
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*/
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static const syntax_selector *
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ats_by_name(const char *name, const asn_TYPE_descriptor_t *td,
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const syntax_selector *first_element) {
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const syntax_selector *element;
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for(element = first_element; element->name; element++) {
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if(strcmp(element->name, name) == 0) {
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if(td && td->op && has_codec_defined(td, element)) {
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return element;
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}
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}
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}
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return NULL;
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}
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int
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main(int ac, char *av[]) {
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FILE *binary_out;
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static asn_TYPE_descriptor_t *pduType = PDU_Type_Ptr;
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ssize_t suggested_bufsize = 8192; /* close or equal to stdio buffer */
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int number_of_iterations = 1;
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int num;
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int ch;
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const syntax_selector *sel;
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enum asn_transfer_syntax isyntax = ATS_INVALID;
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enum asn_transfer_syntax osyntax = ATS_BASIC_XER;
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#ifndef PDU
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if(!pduType) {
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fprintf(stderr, "No -DPDU defined during compilation.\n");
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#ifdef NO_ASN_PDU
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exit(0);
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#else
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exit(EX_SOFTWARE);
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#endif
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}
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#endif
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/* Figure out if specialty decoder needs to be default */
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if(ats_by_name("oer", pduType, input_encodings))
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isyntax = ATS_BASIC_OER;
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if(ats_by_name("per", pduType, input_encodings))
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isyntax = ATS_UNALIGNED_BASIC_PER;
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/*
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* Pocess the command-line argments.
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*/
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while((ch = getopt(ac, av, "i:o:1b:cdn:p:hs:" JUNKOPT RANDOPT)) != -1)
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switch(ch) {
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case 'i':
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sel = ats_by_name(optarg, pduType, input_encodings);
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if(sel) {
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isyntax = sel->syntax;
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} else {
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fprintf(stderr, "-i<format>: '%s': improper format selector\n",
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optarg);
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exit(EX_UNAVAILABLE);
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}
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break;
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case 'o':
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sel = ats_by_name(optarg, pduType, output_encodings);
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if(sel) {
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osyntax = sel->syntax;
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} else {
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fprintf(stderr, "-o<format>: '%s': improper format selector\n",
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optarg);
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exit(EX_UNAVAILABLE);
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}
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break;
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case '1':
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opt_onepdu = 1;
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break;
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case 'b':
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suggested_bufsize = atoi(optarg);
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if(suggested_bufsize < 1
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|| suggested_bufsize > 16 * 1024 * 1024) {
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fprintf(stderr,
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"-b %s: Improper buffer size (1..16M)\n",
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optarg);
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exit(EX_UNAVAILABLE);
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}
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break;
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case 'c':
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opt_check = 1;
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break;
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case 'd':
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opt_debug++; /* Double -dd means ASN.1 debug */
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break;
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case 'n':
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number_of_iterations = atoi(optarg);
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if(number_of_iterations < 1) {
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fprintf(stderr,
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"-n %s: Improper iterations count\n", optarg);
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exit(EX_UNAVAILABLE);
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}
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break;
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case 'p':
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if(strcmp(optarg, "er-nopad") == 0) {
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opt_nopad = 1;
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break;
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}
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#ifdef ASN_PDU_COLLECTION
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if(strcmp(optarg, "list") == 0) {
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asn_TYPE_descriptor_t **pdu = asn_pdu_collection;
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fprintf(stderr, "Available PDU types:\n");
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for(; *pdu; pdu++) printf("%s\n", (*pdu)->name);
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exit(0);
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} else if(optarg[0] >= 'A' && optarg[0] <= 'Z') {
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asn_TYPE_descriptor_t **pdu = asn_pdu_collection;
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while(*pdu && strcmp((*pdu)->name, optarg)) pdu++;
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if(*pdu) { pduType = *pdu; break; }
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fprintf(stderr, "-p %s: Unrecognized PDU\n", optarg);
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exit(EX_USAGE);
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}
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#else /* Without -pdu=auto there's just a single type */
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if(strcmp(optarg, "list") == 0) {
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fprintf(stderr, "Available PDU types:\n");
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printf("%s\n", pduType->name);
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exit(0);
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} else if(optarg[0] >= 'A' && optarg[0] <= 'Z') {
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if(strcmp(optarg, pduType->name) == 0) {
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break;
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}
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fprintf(stderr, "-p %s: Unrecognized PDU\n", optarg);
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exit(EX_USAGE);
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}
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#endif /* ASN_PDU_COLLECTION */
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fprintf(stderr, "-p %s: Unrecognized option\n", optarg);
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exit(EX_UNAVAILABLE);
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case 's':
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opt_stack = atoi(optarg);
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if(opt_stack < 0) {
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fprintf(stderr,
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"-s %s: Non-negative value expected\n",
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optarg);
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exit(EX_UNAVAILABLE);
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}
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break;
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#ifdef JUNKTEST
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case 'J':
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opt_jprob = strtod(optarg, 0);
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if(opt_jprob <= 0.0 || opt_jprob > 1.0) {
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fprintf(stderr,
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"-J %s: Probability range 0..1 expected \n",
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optarg);
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exit(EX_UNAVAILABLE);
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}
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break;
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case 'R':
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isyntax = ATS_RANDOM;
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random_max_size = atoi(optarg);
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if(random_max_size < 0) {
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fprintf(stderr,
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"-R %s: Non-negative value expected\n",
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optarg);
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exit(EX_UNAVAILABLE);
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}
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srandomdev();
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break;
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#endif /* JUNKTEST */
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case 'h':
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default:
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#ifdef ASN_CONVERTER_TITLE
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#define _AXS(x) #x
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#define _ASX(x) _AXS(x)
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fprintf(stderr, "%s\n", _ASX(ASN_CONVERTER_TITLE));
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#endif
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fprintf(stderr, "Usage: %s [options] <datafile> ...\n", av[0]);
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fprintf(stderr, "Where options are:\n");
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for(sel = input_encodings; sel->name; sel++) {
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if(ats_by_name(sel->name, pduType, sel)) {
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fprintf(stderr, " -i%s %s%s\n", sel->name,
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sel->full_name,
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(sel->syntax == isyntax) ? " (DEFAULT)" : "");
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}
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}
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for(sel = output_encodings; sel->name; sel++) {
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if(ats_by_name(sel->name, pduType, sel)) {
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fprintf(stderr, " -o%s%s %s%s\n", sel->name,
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strlen(sel->name) > 3 ? "" : " ",
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sel->full_name,
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(sel->syntax == osyntax) ? " (DEFAULT)" : "");
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}
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}
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if(pduType->op->uper_decoder) {
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fprintf(stderr,
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" -per-nopad Assume PER PDUs are not padded (-iper)\n");
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}
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#ifdef ASN_PDU_COLLECTION
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fprintf(stderr,
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" -p <PDU> Specify PDU type to decode\n"
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" -p list List available PDUs\n");
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#endif /* ASN_PDU_COLLECTION */
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fprintf(stderr,
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" -1 Decode only the first PDU in file\n"
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" -b <size> Set the i/o buffer size (default is %ld)\n"
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" -c Check ASN.1 constraints after decoding\n"
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" -d Enable debugging (-dd is even better)\n"
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" -n <num> Process files <num> times\n"
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" -s <size> Set the stack usage limit (default is %d)\n"
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#ifdef JUNKTEST
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" -J <prob> Set random junk test bit garbaging probability\n"
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" -R <size> Generate a random value of roughly the given size,\n"
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" instead of parsing the value from file.\n"
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#endif
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, (long)suggested_bufsize, ASN__DEFAULT_STACK_MAX);
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exit(EX_USAGE);
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}
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ac -= optind;
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av += optind;
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if(ac < 1 && isyntax != ATS_RANDOM) {
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fprintf(stderr, "%s: No input files specified. "
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"Try '-h' for more information\n",
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av[-optind]);
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exit(EX_USAGE);
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}
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if(isatty(1)) {
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const int is_text_output = osyntax == ATS_NONSTANDARD_PLAINTEXT
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|| osyntax == ATS_BASIC_XER
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|| osyntax == ATS_CANONICAL_XER;
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if(is_text_output) {
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binary_out = stdout;
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} else {
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fprintf(stderr, "(Suppressing binary output to a terminal.)\n");
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binary_out = fopen("/dev/null", "wb");
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if(!binary_out) {
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fprintf(stderr, "Can't open /dev/null: %s\n", strerror(errno));
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exit(EX_OSERR);
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}
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}
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} else {
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binary_out = stdout;
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}
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setvbuf(stdout, 0, _IOLBF, 0);
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for(num = 0; num < number_of_iterations; num++) {
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int ac_i;
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/*
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* Process all files in turn.
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*/
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for(ac_i = (isyntax == ATS_RANDOM) ? -1 : 0; ac_i < ac; ac_i++) {
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asn_enc_rval_t erv;
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void *structure; /* Decoded structure */
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FILE *file;
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char *name;
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int first_pdu;
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if(ac_i == -1) {
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file = NULL;
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name = "<random value generator>";
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opt_onepdu = 1;
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} else {
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file = argument_to_file(av, ac_i);
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name = argument_to_name(av, ac_i);
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}
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for(first_pdu = 1; (first_pdu || !opt_onepdu); first_pdu = 0) {
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/*
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* Decode the encoded structure from file.
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*/
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#ifdef JUNKTEST
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if(isyntax == ATS_RANDOM) {
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structure = NULL;
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if(asn_random_fill(pduType, &structure, random_max_size) != 0) {
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fprintf(stderr, "Cannot generate a random value.\n");
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assert(structure == NULL);
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errno = EINVAL;
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}
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} else {
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#endif
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structure = data_decode_from_file(isyntax, pduType, file, name,
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suggested_bufsize, first_pdu);
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#ifdef JUNKTEST
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}
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#endif
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if(!structure) {
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if(errno) {
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/* Error message is already printed */
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exit(EX_DATAERR);
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} else {
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/* EOF */
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break;
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}
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}
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/* Check ASN.1 constraints */
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if(opt_check) {
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char errbuf[128];
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size_t errlen = sizeof(errbuf);
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if(asn_check_constraints(pduType, structure, errbuf, &errlen)) {
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fprintf(stderr,
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"%s: ASN.1 constraint "
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"check failed: %s\n",
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name, errbuf);
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exit(EX_DATAERR);
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}
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}
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if(osyntax == ATS_INVALID) {
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#ifdef JUNKTEST
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if(opt_jprob == 0.0) {
|
|
fprintf(stderr, "%s: decoded successfully\n", name);
|
|
}
|
|
#else
|
|
fprintf(stderr, "%s: decoded successfully\n", name);
|
|
#endif
|
|
} else {
|
|
erv = asn_encode(NULL, osyntax, pduType, structure, write_out,
|
|
binary_out);
|
|
|
|
if(erv.encoded == -1) {
|
|
fprintf(stderr, "%s: Cannot convert %s into %s\n", name,
|
|
pduType->name, ats_simple_name(osyntax));
|
|
DEBUG("Conversion failed for %s:\n", pduType->name);
|
|
asn_fprint(stderr, pduType, structure);
|
|
exit(EX_UNAVAILABLE);
|
|
}
|
|
DEBUG("Encoded in %" ASN_PRI_SSIZE " bytes of %s", erv.encoded,
|
|
ats_simple_name(osyntax));
|
|
}
|
|
|
|
ASN_STRUCT_FREE(*pduType, structure);
|
|
}
|
|
|
|
if(file && file != stdin) {
|
|
fclose(file);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef JUNKTEST
|
|
if(opt_jprob > 0.0) {
|
|
fprintf(stderr, "Junked %f OK (%d/%d)\n",
|
|
opt_jprob, junk_failures, number_of_iterations);
|
|
}
|
|
#endif /* JUNKTEST */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dynamic_buffer {
|
|
uint8_t *data; /* Pointer to the data bytes */
|
|
size_t offset; /* Offset from the start */
|
|
size_t length; /* Length of meaningful contents */
|
|
size_t unbits; /* Unused bits in the last byte */
|
|
size_t allocated; /* Allocated memory for data */
|
|
int nreallocs; /* Number of data reallocations */
|
|
off_t bytes_shifted; /* Number of bytes ever shifted */
|
|
} DynamicBuffer;
|
|
|
|
static void
|
|
buffer_dump() {
|
|
uint8_t *p = DynamicBuffer.data + DynamicBuffer.offset;
|
|
uint8_t *e = p + DynamicBuffer.length - (DynamicBuffer.unbits ? 1 : 0);
|
|
if(!opt_debug) return;
|
|
DEBUG("Buffer: { d=%p, o=%" ASN_PRI_SIZE ", l=%" ASN_PRI_SIZE
|
|
", u=%" ASN_PRI_SIZE ", a=%" ASN_PRI_SIZE ", s=%" ASN_PRI_SIZE " }",
|
|
(const void *)DynamicBuffer.data,
|
|
DynamicBuffer.offset,
|
|
DynamicBuffer.length,
|
|
DynamicBuffer.unbits,
|
|
DynamicBuffer.allocated,
|
|
(size_t)DynamicBuffer.bytes_shifted);
|
|
for(; p < e; p++) {
|
|
fprintf(stderr, " %c%c%c%c%c%c%c%c",
|
|
((*p >> 7) & 1) ? '1' : '0',
|
|
((*p >> 6) & 1) ? '1' : '0',
|
|
((*p >> 5) & 1) ? '1' : '0',
|
|
((*p >> 4) & 1) ? '1' : '0',
|
|
((*p >> 3) & 1) ? '1' : '0',
|
|
((*p >> 2) & 1) ? '1' : '0',
|
|
((*p >> 1) & 1) ? '1' : '0',
|
|
((*p >> 0) & 1) ? '1' : '0');
|
|
}
|
|
if(DynamicBuffer.unbits) {
|
|
unsigned int shift;
|
|
fprintf(stderr, " ");
|
|
for(shift = 7; shift >= DynamicBuffer.unbits; shift--)
|
|
fprintf(stderr, "%c", ((*p >> shift) & 1) ? '1' : '0');
|
|
fprintf(stderr, " %" ASN_PRI_SSIZE ":%" ASN_PRI_SSIZE "\n",
|
|
(ssize_t)DynamicBuffer.length - 1,
|
|
(ssize_t)8 - DynamicBuffer.unbits);
|
|
} else {
|
|
fprintf(stderr, " %ld\n", (long)DynamicBuffer.length);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Move the buffer content left N bits, possibly joining it with
|
|
* preceeding content.
|
|
*/
|
|
static void
|
|
buffer_shift_left(size_t offset, int bits) {
|
|
uint8_t *ptr = DynamicBuffer.data + DynamicBuffer.offset + offset;
|
|
uint8_t *end = DynamicBuffer.data + DynamicBuffer.offset
|
|
+ DynamicBuffer.length - 1;
|
|
|
|
if(!bits) return;
|
|
|
|
DEBUG("Shifting left %d bits off %ld (o=%ld, u=%ld, l=%ld)",
|
|
bits, (long)offset,
|
|
(long)DynamicBuffer.offset,
|
|
(long)DynamicBuffer.unbits,
|
|
(long)DynamicBuffer.length);
|
|
|
|
if(offset) {
|
|
int right;
|
|
right = ptr[0] >> (8 - bits);
|
|
|
|
DEBUG("oleft: %c%c%c%c%c%c%c%c",
|
|
((ptr[-1] >> 7) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 6) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 5) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 4) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 3) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 2) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 1) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 0) & 1) ? '1' : '0');
|
|
|
|
DEBUG("oriht: %c%c%c%c%c%c%c%c",
|
|
((ptr[0] >> 7) & 1) ? '1' : '0',
|
|
((ptr[0] >> 6) & 1) ? '1' : '0',
|
|
((ptr[0] >> 5) & 1) ? '1' : '0',
|
|
((ptr[0] >> 4) & 1) ? '1' : '0',
|
|
((ptr[0] >> 3) & 1) ? '1' : '0',
|
|
((ptr[0] >> 2) & 1) ? '1' : '0',
|
|
((ptr[0] >> 1) & 1) ? '1' : '0',
|
|
((ptr[0] >> 0) & 1) ? '1' : '0');
|
|
|
|
DEBUG("mriht: %c%c%c%c%c%c%c%c",
|
|
((right >> 7) & 1) ? '1' : '0',
|
|
((right >> 6) & 1) ? '1' : '0',
|
|
((right >> 5) & 1) ? '1' : '0',
|
|
((right >> 4) & 1) ? '1' : '0',
|
|
((right >> 3) & 1) ? '1' : '0',
|
|
((right >> 2) & 1) ? '1' : '0',
|
|
((right >> 1) & 1) ? '1' : '0',
|
|
((right >> 0) & 1) ? '1' : '0');
|
|
|
|
ptr[-1] = (ptr[-1] & (0xff << bits)) | right;
|
|
|
|
DEBUG("after: %c%c%c%c%c%c%c%c",
|
|
((ptr[-1] >> 7) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 6) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 5) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 4) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 3) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 2) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 1) & 1) ? '1' : '0',
|
|
((ptr[-1] >> 0) & 1) ? '1' : '0');
|
|
}
|
|
|
|
buffer_dump();
|
|
|
|
for(; ptr < end; ptr++) {
|
|
int right = ptr[1] >> (8 - bits);
|
|
*ptr = (*ptr << bits) | right;
|
|
}
|
|
*ptr <<= bits;
|
|
|
|
DEBUG("Unbits [%" ASN_PRI_SIZE "=>", DynamicBuffer.unbits);
|
|
if(DynamicBuffer.unbits == 0) {
|
|
DynamicBuffer.unbits += bits;
|
|
} else {
|
|
DynamicBuffer.unbits += bits;
|
|
if(DynamicBuffer.unbits > 7) {
|
|
DynamicBuffer.unbits -= 8;
|
|
DynamicBuffer.length--;
|
|
DynamicBuffer.bytes_shifted++;
|
|
}
|
|
}
|
|
DEBUG("Unbits =>%" ASN_PRI_SIZE "]", DynamicBuffer.unbits);
|
|
|
|
buffer_dump();
|
|
|
|
DEBUG("Shifted. Now (o=%" ASN_PRI_SIZE ", u=%" ASN_PRI_SIZE
|
|
" l=%" ASN_PRI_SIZE ")",
|
|
DynamicBuffer.offset,
|
|
DynamicBuffer.unbits,
|
|
DynamicBuffer.length);
|
|
}
|
|
|
|
/*
|
|
* Ensure that the buffer contains at least this amount of free space.
|
|
*/
|
|
static void add_bytes_to_buffer(const void *data2add, size_t bytes) {
|
|
|
|
if(bytes == 0) return;
|
|
|
|
DEBUG("=> add_bytes(%" ASN_PRI_SIZE ") { o=%" ASN_PRI_SIZE
|
|
" l=%" ASN_PRI_SIZE " u=%" ASN_PRI_SIZE ", s=%" ASN_PRI_SIZE " }",
|
|
bytes,
|
|
DynamicBuffer.offset,
|
|
DynamicBuffer.length,
|
|
DynamicBuffer.unbits,
|
|
DynamicBuffer.allocated);
|
|
|
|
if(DynamicBuffer.allocated
|
|
>= (DynamicBuffer.offset + DynamicBuffer.length + bytes)) {
|
|
DEBUG("\tNo buffer reallocation is necessary");
|
|
} else if(bytes <= DynamicBuffer.offset) {
|
|
DEBUG("\tContents shifted by %ld", DynamicBuffer.offset);
|
|
|
|
/* Shift the buffer contents */
|
|
memmove(DynamicBuffer.data,
|
|
DynamicBuffer.data + DynamicBuffer.offset,
|
|
DynamicBuffer.length);
|
|
DynamicBuffer.bytes_shifted += DynamicBuffer.offset;
|
|
DynamicBuffer.offset = 0;
|
|
} else {
|
|
size_t newsize = (DynamicBuffer.allocated << 2) + bytes;
|
|
void *p = MALLOC(newsize);
|
|
if(!p) {
|
|
perror("malloc()");
|
|
exit(EX_OSERR);
|
|
}
|
|
memcpy(p,
|
|
DynamicBuffer.data + DynamicBuffer.offset,
|
|
DynamicBuffer.length);
|
|
FREEMEM(DynamicBuffer.data);
|
|
DynamicBuffer.data = (uint8_t *)p;
|
|
DynamicBuffer.offset = 0;
|
|
DynamicBuffer.allocated = newsize;
|
|
DynamicBuffer.nreallocs++;
|
|
DEBUG("\tBuffer reallocated to %ld (%d time)",
|
|
newsize, DynamicBuffer.nreallocs);
|
|
}
|
|
|
|
memcpy(DynamicBuffer.data
|
|
+ DynamicBuffer.offset + DynamicBuffer.length,
|
|
data2add, bytes);
|
|
DynamicBuffer.length += bytes;
|
|
if(DynamicBuffer.unbits) {
|
|
int bits = DynamicBuffer.unbits;
|
|
DynamicBuffer.unbits = 0;
|
|
buffer_shift_left(DynamicBuffer.length - bytes, bits);
|
|
}
|
|
|
|
DEBUG("<= add_bytes(%" ASN_PRI_SIZE ") { o=%" ASN_PRI_SIZE
|
|
" l=%" ASN_PRI_SIZE " u=%" ASN_PRI_SIZE ", s=%" ASN_PRI_SIZE " }",
|
|
bytes,
|
|
DynamicBuffer.offset,
|
|
DynamicBuffer.length,
|
|
DynamicBuffer.unbits,
|
|
DynamicBuffer.allocated);
|
|
}
|
|
|
|
static int
|
|
is_syntax_PER(enum asn_transfer_syntax syntax) {
|
|
return (syntax != ATS_UNALIGNED_BASIC_PER
|
|
&& syntax != ATS_UNALIGNED_CANONICAL_PER);
|
|
}
|
|
|
|
static int
|
|
restartability_supported(enum asn_transfer_syntax syntax) {
|
|
return is_syntax_PER(syntax);
|
|
}
|
|
|
|
static void *
|
|
data_decode_from_file(enum asn_transfer_syntax isyntax, asn_TYPE_descriptor_t *pduType, FILE *file, const char *name, ssize_t suggested_bufsize, int on_first_pdu) {
|
|
static uint8_t *fbuf;
|
|
static ssize_t fbuf_size;
|
|
static asn_codec_ctx_t s_codec_ctx;
|
|
asn_codec_ctx_t *opt_codec_ctx = 0;
|
|
void *structure = 0;
|
|
asn_dec_rval_t rval;
|
|
size_t old_offset;
|
|
size_t new_offset;
|
|
int tolerate_eof;
|
|
size_t rd;
|
|
|
|
if(!file) {
|
|
fprintf(stderr, "%s: %s\n", name, strerror(errno));
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
if(opt_stack) {
|
|
s_codec_ctx.max_stack_size = opt_stack;
|
|
opt_codec_ctx = &s_codec_ctx;
|
|
}
|
|
|
|
DEBUG("Processing %s", name);
|
|
|
|
/* prepare the file buffer */
|
|
if(fbuf_size != suggested_bufsize) {
|
|
fbuf = (uint8_t *)REALLOC(fbuf, suggested_bufsize);
|
|
if(!fbuf) {
|
|
perror("realloc()");
|
|
exit(EX_OSERR);
|
|
}
|
|
fbuf_size = suggested_bufsize;
|
|
}
|
|
|
|
if(on_first_pdu) {
|
|
DynamicBuffer.offset = 0;
|
|
DynamicBuffer.length = 0;
|
|
DynamicBuffer.unbits = 0;
|
|
DynamicBuffer.allocated = 0;
|
|
DynamicBuffer.bytes_shifted = 0;
|
|
DynamicBuffer.nreallocs = 0;
|
|
}
|
|
|
|
old_offset = DynamicBuffer.bytes_shifted + DynamicBuffer.offset;
|
|
|
|
/* Pretend immediate EOF */
|
|
rval.code = RC_WMORE;
|
|
rval.consumed = 0;
|
|
|
|
for(tolerate_eof = 1; /* Allow EOF first time buffer is non-empty */
|
|
(rd = fread(fbuf, 1, fbuf_size, file))
|
|
|| feof(file) == 0
|
|
|| (tolerate_eof && DynamicBuffer.length)
|
|
;) {
|
|
int ecbits = 0; /* Extra consumed bits in case of PER */
|
|
uint8_t *i_bptr;
|
|
size_t i_size;
|
|
|
|
/*
|
|
* Copy the data over, or use the original buffer.
|
|
*/
|
|
if(DynamicBuffer.allocated) {
|
|
/* Append new data into the existing dynamic buffer */
|
|
add_bytes_to_buffer(fbuf, rd);
|
|
i_bptr = DynamicBuffer.data + DynamicBuffer.offset;
|
|
i_size = DynamicBuffer.length;
|
|
} else {
|
|
i_bptr = fbuf;
|
|
i_size = rd;
|
|
}
|
|
|
|
DEBUG("Decoding %" ASN_PRI_SIZE " bytes", i_size);
|
|
|
|
#ifdef JUNKTEST
|
|
junk_bytes_with_probability(i_bptr, i_size, opt_jprob);
|
|
#endif
|
|
|
|
if(is_syntax_PER(isyntax) && opt_nopad) {
|
|
#ifdef ASN_DISABLE_PER_SUPPORT
|
|
rval.code = RC_FAIL;
|
|
rval.consumed = 0;
|
|
#else
|
|
rval = uper_decode(opt_codec_ctx, pduType, (void **)&structure,
|
|
i_bptr, i_size, 0, DynamicBuffer.unbits);
|
|
/* uper_decode() returns bits! */
|
|
ecbits = rval.consumed % 8; /* Bits consumed from the last byte */
|
|
rval.consumed >>= 3; /* Convert bits into bytes. */
|
|
#endif
|
|
/* Non-padded PER decoder */
|
|
} else {
|
|
rval = asn_decode(opt_codec_ctx, isyntax, pduType,
|
|
(void **)&structure, i_bptr, i_size);
|
|
}
|
|
if(rval.code == RC_WMORE && !restartability_supported(isyntax)) {
|
|
/* PER does not support restartability */
|
|
ASN_STRUCT_FREE(*pduType, structure);
|
|
structure = 0;
|
|
rval.consumed = 0;
|
|
/* Continue accumulating data */
|
|
}
|
|
|
|
DEBUG("decode(%" ASN_PRI_SIZE ") consumed %" ASN_PRI_SIZE
|
|
"+%db (%" ASN_PRI_SIZE "), code %d",
|
|
DynamicBuffer.length, rval.consumed, ecbits, i_size, rval.code);
|
|
|
|
if(DynamicBuffer.allocated == 0) {
|
|
/*
|
|
* Flush remainder into the intermediate buffer.
|
|
*/
|
|
if(rval.code != RC_FAIL && rval.consumed < rd) {
|
|
add_bytes_to_buffer(fbuf + rval.consumed,
|
|
rd - rval.consumed);
|
|
buffer_shift_left(0, ecbits);
|
|
DynamicBuffer.bytes_shifted = rval.consumed;
|
|
rval.consumed = 0;
|
|
ecbits = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Adjust position inside the source buffer.
|
|
*/
|
|
if(DynamicBuffer.allocated) {
|
|
DynamicBuffer.offset += rval.consumed;
|
|
DynamicBuffer.length -= rval.consumed;
|
|
} else {
|
|
DynamicBuffer.bytes_shifted += rval.consumed;
|
|
}
|
|
|
|
switch(rval.code) {
|
|
case RC_OK:
|
|
if(ecbits) buffer_shift_left(0, ecbits);
|
|
DEBUG("RC_OK, finishing up with %ld+%d",
|
|
(long)rval.consumed, ecbits);
|
|
return structure;
|
|
case RC_WMORE:
|
|
DEBUG("RC_WMORE, continuing read=%ld, cons=%ld "
|
|
" with %ld..%ld-%ld..%ld",
|
|
(long)rd,
|
|
(long)rval.consumed,
|
|
(long)DynamicBuffer.offset,
|
|
(long)DynamicBuffer.length,
|
|
(long)DynamicBuffer.unbits,
|
|
(long)DynamicBuffer.allocated);
|
|
if(!rd) tolerate_eof--;
|
|
continue;
|
|
case RC_FAIL:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
DEBUG("Clean up partially decoded %s", pduType->name);
|
|
ASN_STRUCT_FREE(*pduType, structure);
|
|
|
|
new_offset = DynamicBuffer.bytes_shifted + DynamicBuffer.offset;
|
|
|
|
/*
|
|
* Print a message and return failure only if not EOF,
|
|
* unless this is our first PDU (empty file).
|
|
*/
|
|
if(on_first_pdu
|
|
|| DynamicBuffer.length
|
|
|| new_offset - old_offset > ((isyntax == ATS_BASIC_XER)?sizeof("\r\n")-1:0)
|
|
) {
|
|
|
|
#ifdef JUNKTEST
|
|
/*
|
|
* Nothing's wrong with being unable to decode junk.
|
|
* Simulate EOF.
|
|
*/
|
|
if(opt_jprob != 0.0) {
|
|
junk_failures++;
|
|
errno = 0;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
DEBUG("ofp %d, no=%ld, oo=%ld, dbl=%ld",
|
|
on_first_pdu, (long)new_offset, (long)old_offset,
|
|
(long)DynamicBuffer.length);
|
|
fprintf(stderr, "%s: "
|
|
"Decode failed past byte %ld: %s\n",
|
|
name, (long)new_offset,
|
|
(rval.code == RC_WMORE)
|
|
? "Unexpected end of input"
|
|
: "Input processing error");
|
|
#ifndef ENOMSG
|
|
#define ENOMSG EINVAL
|
|
#endif
|
|
#ifndef EBADMSG
|
|
#define EBADMSG EINVAL
|
|
#endif
|
|
errno = (rval.code == RC_WMORE) ? ENOMSG : EBADMSG;
|
|
} else {
|
|
/* Got EOF after a few successful PDUs */
|
|
errno = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Dump the buffer out to the specified FILE */
|
|
static int write_out(const void *buffer, size_t size, void *key) {
|
|
FILE *fp = (FILE *)key;
|
|
return (fwrite(buffer, 1, size, fp) == size) ? 0 : -1;
|
|
}
|
|
|
|
static int argument_is_stdin(char *av[], int idx) {
|
|
if(strcmp(av[idx], "-")) {
|
|
return 0; /* Certainly not <stdin> */
|
|
} else {
|
|
/* This might be <stdin>, unless `./program -- -` */
|
|
if(strcmp(av[-1], "--"))
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static FILE *argument_to_file(char *av[], int idx) {
|
|
return argument_is_stdin(av, idx) ? stdin : fopen(av[idx], "rb");
|
|
}
|
|
|
|
static char *argument_to_name(char *av[], int idx) {
|
|
return argument_is_stdin(av, idx) ? "standard input" : av[idx];
|
|
}
|
|
|
|
#ifdef JUNKTEST
|
|
/*
|
|
* Fill bytes with some garbage with specified probability (more or less).
|
|
*/
|
|
static void
|
|
junk_bytes_with_probability(uint8_t *buf, size_t size, double prob) {
|
|
static int junkmode;
|
|
uint8_t *ptr;
|
|
uint8_t *end;
|
|
if(opt_jprob <= 0.0) return;
|
|
for(ptr = buf, end = ptr + size; ptr < end; ptr++) {
|
|
int byte = *ptr;
|
|
if(junkmode++ & 1) {
|
|
if((((double)random() / RAND_MAX) < prob))
|
|
byte = random() & 0xff;
|
|
} else {
|
|
#define BPROB(b) ((((double)random() / RAND_MAX) < prob) ? b : 0)
|
|
byte ^= BPROB(0x80);
|
|
byte ^= BPROB(0x40);
|
|
byte ^= BPROB(0x20);
|
|
byte ^= BPROB(0x10);
|
|
byte ^= BPROB(0x08);
|
|
byte ^= BPROB(0x04);
|
|
byte ^= BPROB(0x02);
|
|
byte ^= BPROB(0x01);
|
|
}
|
|
if(byte != *ptr) {
|
|
DEBUG("Junk buf[%d] %02x -> %02x", ptr - buf, *ptr, byte);
|
|
*ptr = byte;
|
|
}
|
|
}
|
|
}
|
|
#endif /* JUNKTEST */
|
|
|