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3
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1 #include "wm.h"
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2 #include "signature.h"
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3
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4 char *progname;
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5
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6 void usage(void) {
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7 fprintf(stderr, "usage: %s [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-q n] [-s file] [-S n] [-v n] file\n\n", progname);
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8 fprintf(stderr, "\t-h\t\tprint usage\n");
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9 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
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10 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
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11 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
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12 fprintf(stderr, "\t-l n\t\tembedding level (default 1)\n");
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13 fprintf(stderr, "\t-n n\t\twatermark bit length\n");
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14 fprintf(stderr, "\t-o file\t\toutput file\n");
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15 fprintf(stderr, "\t-q n\t\tsignature strength (default 4)\n");
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16 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
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17 fprintf(stderr, "\t-S n\t\tseed\n");
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18 fprintf(stderr, "\t-v n\t\tverbosity level\n");
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19 exit(0);
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20 }
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21
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22 int main(int argc, char *argv[]) {
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23 FILE *in = stdin;
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24 FILE *out = stdout;
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25 FILE *sig = NULL;
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26
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27 char output_name[MAXPATHLEN] = "(stdout)";
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28 char input_name[MAXPATHLEN] = "(stdin)";
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29 char signature_name[MAXPATHLEN];
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30 char *binstr;
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31
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32 int verbose = 0;
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33 int c;
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34 int i;
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35 int l = 1;
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36 int n = 0;
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37 int s = 0;
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38 int q = 4;
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39 int e = 2;
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40 int f = 1;
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41 char F[MAXPATHLEN] = "filter.dat";
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42
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43 progname = argv[0];
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44
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45 wm_init();
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46
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47 while ((c = getopt(argc, argv, "e:f:F:h?l:n:o:q:s:S:v:")) != EOF) {
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48 switch (c) {
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49 case 'e':
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50 e = atoi(optarg);
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51 if (e < 0) {
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52 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
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53 }
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54 break;
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55 case 'f':
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56 f = atoi(optarg);
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57 if (f <= 0) {
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58 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
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59 exit(1);
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60 }
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61 break;
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62 case 'F':
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63 strcpy(F, optarg);
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64 break;
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65 case 'h':
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66 case '?':
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67 usage();
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68 break;
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69 case 'l':
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70 l = atoi(optarg);
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71 if (l < 1) {
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72 fprintf(stderr, "%s: embedding level out of range\n", progname);
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73 exit(1);
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74 }
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75 break;
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76 case 'n':
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77 n = atoi(optarg);
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78 if (n < 1 || n > 1000) {
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79 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
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80 exit(1);
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81 }
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82 break;
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83 case 'o':
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84 if ((out = fopen(optarg, "wb")) == NULL) {
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85 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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86 exit(1);
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87 }
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88 strcpy(output_name, optarg);
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89 break;
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90 case 'q':
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91 q = atoi(optarg);
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92 if (q < 1) {
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93 fprintf(stderr, "%s: signature strength %d out of range\n", progname, q);
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94 exit(1);
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95 }
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96 break;
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97 case 's':
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98 if ((sig = fopen(optarg, "r")) == NULL) {
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99 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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100 exit(1);
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101 }
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102 strcpy(signature_name, optarg);
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103 break;
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104 case 'S':
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105 s = atoi(optarg);
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106 break;
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107 case 'v':
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108 verbose = atoi(optarg);
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109 if (verbose < 0) {
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110 fprintf(stderr, "%s: verbosity level %d out of range", progname, verbose);
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111 exit(1);
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112 }
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113 break;
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114 }
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115 }
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116
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117 argc -= optind;
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118 argv += optind;
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119
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120 if (argc > 1) {
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121 usage();
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122 exit(1);
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123 }
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124
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125 if (argc == 1 && *argv[0] != '-')
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126 if ((in = fopen(argv[0], "rb")) == NULL) {
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127 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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128 exit(1);
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129 }
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130 else
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131 strcpy(input_name, argv[0]);
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132
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133 if (sig) {
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134 char line[32];
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135 fgets(line, sizeof(line), sig);
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136 if (strspn(line, "KD3SG") >= 5) {
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137 if (n == 0)
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138 fscanf(sig, "%d\n", &n);
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139 else
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140 fscanf(sig, "%*d\n");
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141 if (q == 0)
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142 fscanf(sig, "%d\n", &q);
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143 else
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144 fscanf(sig, "%*d\n");
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145 if (e < 0)
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146 fscanf(sig, "%d\n", &e);
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147 else
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148 fscanf(sig, "%*d\n");
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149 if (f == 0)
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150 fscanf(sig, "%d\n", &f);
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151 else
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152 fscanf(sig, "%*d\n");
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153 if (!strcmp(F, ""))
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154 fscanf(sig, "%[^\n\r]\n", &F);
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155 else
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156 fscanf(sig, "%*[^\n\r]\n");
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157 if (l == 0)
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158 fscanf(sig, "%d\n", &l);
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159 else
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160 fscanf(sig, "%*d\n");
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161 }
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162 else {
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163 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
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164 exit(1);
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165 }
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166 close(sig);
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167 }
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168
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169 if (s)
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170 srandom(s);
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171 else
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172 srandom(time(NULL) * getpid());
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173
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174 if (n > 0) {
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175 n_signature = fread(signature, sizeof(char), i = NBITSTOBYTES(n), in);
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176 if (n_signature < i) {
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177 fprintf(stderr, "%s: failed to read all %d signature bits from %s\n", progname, n, input_name);
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178 exit(1);
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179 }
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180 }
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181 else {
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182 if (fscanf(in, "%128[^\n\r]", signature) == EOF) {
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183 fprintf(stderr, "%s: failed to read signature bits from %s\n", progname, input_name);
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184 exit(1);
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185 }
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186 n_signature = strlen(signature);
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187 nbit_signature = NBYTESTOBITS(n_signature);
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188 fprintf(stderr, "%s: got %d signature bits\n", progname, nbit_signature);
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189 }
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190
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191 fprintf(out, "KD3SG\n");
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192 fprintf(out, "%d\n", n);
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193 fprintf(out, "%d\n", q);
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194 fprintf(out, "%d\n", e);
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195 fprintf(out, "%d\n", f);
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196 fprintf(out, "%s\n", F);
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197 fprintf(out, "%d\n", l);
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198 fprintf(out, "%d\n", random());
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199 nbit_signature = NBYTESTOBITS(n_signature);
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200 binstr = malloc((nbit_signature + 1) * sizeof(char));
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201 sig_to_binstr(binstr);
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202 fprintf(out, "%s\n", binstr);
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203 free(binstr);
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204
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205 fclose(out);
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206
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207 exit(0);
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208 }
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