--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Meerwald-dir/gen_kund2_sig.c	Fri Dec 20 13:08:59 2024 +0100
@@ -0,0 +1,221 @@
+#include "wm.h"
+#include "signature.h"
+
+char *progname;
+
+void usage(void) {
+  fprintf(stderr, "usage: %s [-b n] [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-q n] [-s file] [-S n] [-v n] file\n\n", progname);
+  fprintf(stderr, "\t-h\t\tprint usage\n");
+  fprintf(stderr, "\t-b n\t\tblock size (default 64)\n");
+  fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
+  fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
+  fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
+  fprintf(stderr, "\t-l n\t\tembedding level (default 1)\n");
+  fprintf(stderr, "\t-n n\t\twatermark bit length\n");
+  fprintf(stderr, "\t-o file\t\toutput file\n");
+  fprintf(stderr, "\t-q n\t\tsignature strength (default 4)\n");
+  fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
+  fprintf(stderr, "\t-S n\t\tseed\n");
+  fprintf(stderr, "\t-v n\t\tverbosity level\n");
+  exit(0);
+}
+
+int main(int argc, char *argv[]) {
+  FILE *in = stdin;
+  FILE *out = stdout;
+  FILE *sig = NULL;
+
+  char output_name[MAXPATHLEN] = "(stdout)";
+  char input_name[MAXPATHLEN] = "(stdin)";
+  char signature_name[MAXPATHLEN];
+  char *binstr;
+
+  int verbose = 0;
+  int c;
+  int i;
+  int l = 3;
+  int n = 0;
+  int s = 0;
+  int q = 4;
+  int e = 2;
+  int f = 1;
+  int blocksize = 64;
+  char F[MAXPATHLEN] = "filter.dat";
+
+  progname = argv[0];
+
+  wm_init();
+
+  while ((c = getopt(argc, argv, "b:e:f:F:h?l:n:o:q:s:S:v:")) != EOF) {
+    switch (c) {
+      case 'b':
+        blocksize = atoi(optarg);
+        if (blocksize < 0)
+          fprintf(stderr, "%s: block size %d out of range\n", progname, blocksize);
+        break;
+      case 'e':
+        e = atoi(optarg);
+        if (e < 0) {
+          fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
+        }
+        break;
+      case 'f':
+        f = atoi(optarg);
+        if (f <= 0) {
+          fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
+          exit(1);
+        }
+        break;
+      case 'F':
+        strcpy(F, optarg);
+        break;
+      case 'h':
+      case '?':
+        usage();
+        break;
+      case 'l':
+        l = atoi(optarg);
+        if (l < 1) {
+          fprintf(stderr, "%s: embedding level out of range\n", progname);
+          exit(1);
+        }
+        break;
+      case 'n':
+        n = atoi(optarg);
+        if (n < 1 || n > 1000) {
+          fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
+          exit(1);
+        }
+        break;
+      case 'o':
+        if ((out = fopen(optarg, "wb")) == NULL) {
+          fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
+          exit(1);
+        }
+        strcpy(output_name, optarg);
+        break;
+      case 'q':
+        q = atoi(optarg);
+        if (q < 1) {
+          fprintf(stderr, "%s: signature strength %d out of range\n", progname, q);
+          exit(1);
+        }
+        break;
+     case 's':
+        if ((sig = fopen(optarg, "r")) == NULL) {
+          fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
+          exit(1);
+        }
+        strcpy(signature_name, optarg);
+        break;
+      case 'S':
+        s = atoi(optarg);
+        break;
+      case 'v':
+        verbose = atoi(optarg);
+        if (verbose < 0) {
+          fprintf(stderr, "%s: verbosity level %d out of range", progname, verbose);
+          exit(1);
+        }
+        break;
+    }
+  }
+
+  argc -= optind;
+  argv += optind;
+
+  if (argc > 1) {
+    usage();
+    exit(1);
+  }
+
+  if (argc == 1 && *argv[0] != '-') {
+    if ((in = fopen(argv[0], "rb")) == NULL) {
+      fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
+      exit(1);
+    }
+    else
+      strcpy(input_name, argv[0]);
+  }
+  
+  if (sig) {
+    char line[32];
+    fgets(line, sizeof(line), sig);
+    if (strspn(line, "KD2SG") >= 5) {
+      if (n == 0)
+        fscanf(sig, "%d\n", &n);
+      else
+        fscanf(sig, "%*d\n");
+      if (q == 0)
+        fscanf(sig, "%d\n", &q);
+      else
+        fscanf(sig, "%*d\n");
+      if (blocksize == 0)
+        fscanf(sig, "%d\n", &blocksize);
+      else
+        fscanf(sig, "%*d\n");
+      if (e < 0)
+        fscanf(sig, "%d\n", &e);
+      else
+        fscanf(sig, "%*d\n");
+      if (f == 0)
+        fscanf(sig, "%d\n", &f);
+      else
+        fscanf(sig, "%*d\n");
+      if (!strcmp(F, ""))
+        fscanf(sig, "%[^\n\r]\n", F);
+      else
+        fscanf(sig, "%*[^\n\r]\n");
+      if (l == 0)
+        fscanf(sig, "%d\n", &l);
+      else
+        fscanf(sig, "%*d\n");
+    }
+   else {
+      fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
+      exit(1);
+    }
+    fclose(sig);
+  }
+
+  if (s)
+    srandom(s);
+  else
+    srandom(time(NULL) * getpid());
+
+  if (n > 0) {
+    n_signature = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
+    nbit_signature = NBYTESTOBITS(n_signature);
+    if (n_signature < i) {
+      fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
+      exit(1);
+    }
+  }
+  else {
+    if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
+      fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
+      exit(1);
+    }
+    n_signature = strlen(signature);
+    nbit_signature = NBYTESTOBITS(n_signature);
+    fprintf(stderr, "%s: got %d signature bits\n", progname, nbit_signature);
+  }
+
+  fprintf(out, "KD2SG\n");
+  fprintf(out, "%d\n", nbit_signature);
+  fprintf(out, "%d\n", q);
+  fprintf(out, "%d\n", blocksize);
+  fprintf(out, "%d\n", e);
+  fprintf(out, "%d\n", f);
+  fprintf(out, "%s\n", F);
+  fprintf(out, "%d\n", l);
+  fprintf(out, "%ld\n", random());
+  binstr = malloc((nbit_signature + 1) * sizeof(char));
+  sig_to_binstr(binstr);
+  fprintf(out, "%s\n", binstr);
+  free(binstr);
+
+  fclose(out);
+
+  exit(0);
+}