mono/dis/declsec.c

   1 /*
   2  * declsec.h:  Support for the new declarative security attribute
   3  *      metadata format (2.0)
   4  *
   5  * Author:
   6  *      Sebastien Pouliot  <sebastien@ximian.com>
   7  *
   8  * Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   9  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  10  */
  11
  12 #include <glib.h>
  13 #include <math.h>
  14
  15 #include "mono/metadata/blob.h"
  16 #include "mono/metadata/metadata.h"
  17 #include "mono/metadata/mono-endian.h"
  18 #include "mono/utils/mono-compiler.h"
  19 #include "mono/utils/mono-math.h"
  20
  21 #include "declsec.h"
  22 #include "util.h"
  23
  24 static char*
  25 declsec_20_get_classname (const char* p, const char **rptr)
  26 {
  27         int apos, cpos = 0;
  28         char *c;
  29         char *a;
  30         char *result;
  31         GString *res = g_string_new ("");
  32         int len = mono_metadata_decode_value (p, &p);
  33
  34         c = (char *) p;
  35         while ((*c++ != ',') && (cpos++ < len));
  36         c++;
  37
  38         apos = cpos;
  39         a = c;
  40         while ((*a++ != ',') && (apos++ < len));
  41
  42         if (apos - cpos > 1) {
  43                 g_string_append_printf (res, "[%.*s]%.*s", apos - cpos, c, cpos, p);
  44         } else {
  45                 /* in-assembly type aren't fully qualified (no comma) */
  46                 g_string_append_printf (res, "%.*s", cpos - 1, p);
  47         }
  48
  49         p += len;
  50         if (rptr)
  51                 *rptr = p;
  52
  53         result = res->str;
  54         g_string_free (res, FALSE);
  55         return result;
  56 }
  57
  58 static gboolean
  59 declsec_20_write_type (GString *str, char type)
  60 {
  61         switch (type) {
  62         case MONO_TYPE_BOOLEAN:
  63                 g_string_append (str, "bool");
  64                 break;
  65         case MONO_TYPE_SZARRAY:
  66                 g_string_append (str, "[]");
  67                 break;
  68         case MONO_TYPE_SYSTEM_TYPE:
  69                 g_string_append (str, "type");
  70                 break;
  71         case MONO_TYPE_STRING:
  72                 g_string_append (str, "string");
  73                 break;
  74         default:
  75                 g_warning ("TODO type %d - please fill a bug report on this!", type);
  76                 return FALSE;
  77         }
  78         return TRUE;
  79 }
  80
  81 static const char*
  82 declsec_20_write_value (GString *str, char type, const char *value)
  83 {
  84         switch (type) {
  85         case MONO_TYPE_U1:
  86                 g_string_append_printf (str, "%d", (unsigned char)*value);
  87                 return value + 1;
  88         case MONO_TYPE_I1:
  89                 g_string_append_printf (str, "%d", *value);
  90                 return value + 1;
  91         case MONO_TYPE_BOOLEAN:
  92                 g_string_append_printf (str, "%s", *value ? "true" : "false");
  93                 return value + 1;
  94         case MONO_TYPE_CHAR:
  95                 g_string_append_printf (str, "0x%04X", read16 (value));
  96                 return value + 2;
  97         case MONO_TYPE_U2:
  98                 g_string_append_printf (str, "%d", read16 (value));
  99                 return value + 2;
 100         case MONO_TYPE_I2:
 101                 g_string_append_printf (str, "%d", (gint16)read16 (value));
 102                 return value + 2;
 103         case MONO_TYPE_U4:
 104                 g_string_append_printf (str, "%d", read32 (value));
 105                 return value + 4;
 106         case MONO_TYPE_I4:
 107                 g_string_append_printf (str, "%d", (gint32)read32 (value));
 108                 return value + 4;
 109         case MONO_TYPE_U8:
 110         case MONO_TYPE_I8:
 111                 g_string_append_printf (str, "%" PRId64, (gint64)read64 (value));
 112                 return value + 8;
 113         case MONO_TYPE_R4: {
 114                 float val;
 115                 readr4 (value, &val);
 116                 const int inf = mono_isinf (val);
 117                 if (inf == -1)
 118                         g_string_append_printf (str, "0xFF800000"); /* negative infinity */
 119                 else if (inf == 1)
 120                         g_string_append_printf (str, "0x7F800000"); /* positive infinity */
 121                 else if (mono_isnan (val))
 122                         g_string_append_printf (str, "0xFFC00000"); /* NaN */
 123                 else
 124                         g_string_append_printf (str, "%.8g", val);
 125                 return value + 4;
 126         }
 127         case MONO_TYPE_R8: {
 128                 double val;
 129                 readr8 (value, &val);
 130                 const int inf = mono_isinf (val);
 131                 if (inf == -1)
 132                         g_string_append_printf (str, "0xFFF00000000000000"); /* negative infinity */
 133                 else if (inf == 1)
 134                         g_string_append_printf (str, "0x7FFF0000000000000"); /* positive infinity */
 135                 else if (mono_isnan (val))
 136                         g_string_append_printf (str, "0xFFF80000000000000"); /* NaN */
 137                 else
 138                         g_string_append_printf (str, "%.17g", val);
 139                 return value + 8;
 140         }
 141         case MONO_TYPE_STRING:
 142                 if (*value == (char)0xff) {
 143                         g_string_append (str, "nullref");
 144                         return value + 1;
 145                 } else {
 146                         int len = mono_metadata_decode_value (value, &value);
 147                         g_string_append_printf (str, "'%.*s'", len, value);
 148                         return value + len;
 149                 }
 150         case MONO_TYPE_SYSTEM_TYPE: {
 151                 char *cname = declsec_20_get_classname (value, NULL);
 152                 int len = mono_metadata_decode_value (value, &value);
 153                 g_string_append (str, cname);
 154                 g_free (cname);
 155                 return value + len;
 156         }
 157         }
 158         return 0;
 159 }
 160
 161 char*
 162 dump_declsec_entry20 (MonoImage *m, const char* p, const char *indent)
 163 {
 164         int i, num;
 165         char *result;
 166         GString *res = g_string_new ("");
 167
 168         if (*p++ != MONO_DECLSEC_FORMAT_20)
 169                 return NULL;
 170
 171         g_string_append (res, "{");
 172
 173         /* number of encoded permission attributes */
 174         num = mono_metadata_decode_value (p, &p);
 175
 176         for (i = 0; i < num; i++) {
 177                 int len, j, pos = 0, param_len;
 178                 char *param_start;
 179                 char *s = declsec_20_get_classname (p, &p);
 180                 g_string_append_printf (res, "%s = {", s);
 181                 g_free (s);
 182
 183                 /* optional parameters length */
 184                 param_len = mono_metadata_decode_value (p, &p);
 185                 param_start = (char *) p;
 186
 187                 /* number of parameters */
 188                 pos = mono_metadata_decode_value (p, &p);
 189                 for (j = 0; j < pos; j++) {
 190                         int k, elem;
 191                         int type = *p++;
 192
 193                         switch (type) {
 194                         case MONO_DECLSEC_FIELD:
 195                                 /* not sure if/how we can get this in a declarative security attribute... */
 196                                 g_string_append (res, "field ");
 197                                 break;
 198                         case MONO_DECLSEC_PROPERTY:
 199                                 g_string_append (res, "property ");
 200                                 break;
 201                         default:
 202                                 g_warning ("TODO %d - please fill a bug report on this!", type);
 203                                 break;
 204                         }
 205
 206                         type = *p++;
 207
 208                         if (type == MONO_DECLSEC_ENUM) {
 209                                 s = declsec_20_get_classname (p, &p);
 210                                 len = mono_metadata_decode_value (p, &p);
 211                                 g_string_append_printf (res, "enum %s '%.*s' = ", s, len, p);
 212                                 g_free (s);
 213                                 p += len;
 214                                 /* TODO: we must detect the size of the enum element (from the type ? length ?)
 215                                  * note: ildasm v2 has some problem decoding them too and doesn't
 216                                  * seems to rely on the type (as the other assembly isn't loaded) */
 217                                 g_string_append_printf (res, "int32(%d)", read32 (p));
 218                                 p += 4;
 219                         } else {
 220                                 int arraytype = 0;
 221                                 if (type == MONO_TYPE_SZARRAY) {
 222                                         arraytype = *p++;
 223                                         declsec_20_write_type (res, arraytype);
 224                                 }
 225                                 declsec_20_write_type (res, type);
 226
 227                                 len = mono_metadata_decode_value (p, &p);
 228                                 g_string_append_printf (res, " '%.*s' = ", len, p);
 229                                 p += len;
 230
 231                                 if (type == MONO_TYPE_SZARRAY) {
 232                                         type = arraytype;
 233                                         declsec_20_write_type (res, type);
 234                                         elem = read32 (p);
 235                                         p += 4;
 236                                         g_string_append_printf (res, "[%d]", elem);
 237                                 } else {
 238                                         declsec_20_write_type (res, type);
 239                                         elem = 1;
 240                                 }
 241                                 g_string_append (res, "(");
 242
 243                                 /* write value - or each element in the array */
 244                                 for (k = 0; k < elem; k++) {
 245                                         p = declsec_20_write_value (res, type, p);
 246                                         /* separate array elements */
 247                                         if (k < elem - 1)
 248                                                 g_string_append (res, " ");
 249                                 }
 250
 251                                 if (j < pos - 1)
 252                                         g_string_append_printf (res, ")\n%s", indent);
 253                                 else
 254                                         g_string_append (res, ")");
 255                         }
 256
 257                 }
 258
 259                 if (i < num - 1)
 260                         g_string_append_printf (res, "},\n%s", indent);
 261                 else
 262                         g_string_append (res, "}");
 263
 264                 if (param_len > 0)
 265                         p = param_start + param_len;
 266         }
 267         g_string_append (res, "}");
 268
 269         result = res->str;
 270         g_string_free (res, FALSE);
 271         return result;
 272 }