static int attributes_walk(RBinJavaObj *bin, struct r_bin_java_attr_t *attr, int sz2, int fields) {
char buf[0xffff+1]; // that's kinda ugly :)
int sz3, sz4;
int j=0,k;
char *name;
for (j=0; j<sz2; j++) {
if (r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, 6) != 6) {
eprintf ("Cannot read 6 bytes in class file\n");
return R_FALSE;
}
attr->name_idx = R_BIN_JAVA_USHORT(buf,0);
name = get_cp (bin, attr->name_idx-1)->value;
// XXX: if name is null.. wat?
attr->name = strdup (name? name: "");
name = (get_cp(bin, attr->name_idx-1))->value;//cp_items[R_BIN_JAVA_USHORT(buf,0)-1].value;
IFDBG printf(" %2d: Name Index: %d (%s)\n", j, attr->name_idx, name);
// TODO add comment with constant pool index
sz3 = R_BIN_JAVA_UINT (buf, 2);
if (fields) {
attr->type = R_BIN_JAVA_TYPE_FIELD;
IFDBG printf ("FIELD\n");
} else if (sz3 > 0){
attr->length = sz3;
IFDBG printf (" Length: %d\n", sz3); //R_BIN_JAVA_UINT(buf, 2));
if (!name) {
IFDBG printf ("**ERROR ** Cannot identify attribute name into constant pool\n");
continue;
}
if (!strcmp (name, "Code")) {
attr->type = R_BIN_JAVA_TYPE_CODE;
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, 8);
attr->info.code.max_stack = R_BIN_JAVA_USHORT(buf, 0);
IFDBG printf(" Max Stack: %d\n", attr->info.code.max_stack);
attr->info.code.max_locals = R_BIN_JAVA_USHORT(buf, 2);
IFDBG printf(" Max Locals: %d\n", attr->info.code.max_locals);
attr->info.code.code_length = R_BIN_JAVA_UINT(buf, 4);
IFDBG printf(" Code Length: %d\n", attr->info.code.code_length);
attr->info.code.code_offset = (ut64)bin->b->cur;
IFDBG printf(" Code At Offset: 0x%08"PFMT64x"\n", (ut64)attr->info.code.code_offset);
r_buf_read_at(bin->b, R_BUF_CUR, (ut8*)buf, R_BIN_JAVA_UINT(buf, 4)); // READ CODE
sz4 = read_short(bin);
attr->info.code.exception_table_length = sz4;
IFDBG printf(" Exception table length: %d\n", attr->info.code.exception_table_length);
for (k=0;k<sz4;k++) {
r_buf_read_at(bin->b, R_BUF_CUR, (ut8*)buf, 8);
attr->info.code.start_pc = R_BIN_JAVA_USHORT(buf,0);
IFDBG printf(" start_pc: 0x%04x\n", attr->info.code.start_pc);
attr->info.code.end_pc = R_BIN_JAVA_USHORT(buf,2);
IFDBG printf(" end_pc: 0x%04x\n", attr->info.code.end_pc);
attr->info.code.handler_pc = R_BIN_JAVA_USHORT(buf,4);
IFDBG printf(" handler_pc: 0x%04x\n", attr->info.code.handler_pc);
attr->info.code.catch_type = R_BIN_JAVA_USHORT(buf,6);
IFDBG printf(" catch_type: %d\n", attr->info.code.catch_type);
}
sz4 = (unsigned int)read_short(bin);
IFDBG printf(" code Attributes_count: %d\n", sz4);
if (sz4>0) {
attr->attributes = malloc(1+sz4 * sizeof(struct r_bin_java_attr_t));
attributes_walk(bin, attr->attributes, sz4, fields);
}
} else
if (!strcmp (name, "LineNumberTable")) {
attr->type = R_BIN_JAVA_TYPE_LINENUM;
sz4 = (unsigned int)read_short (bin);
attr->info.linenum.table_length = sz4;
IFDBG printf(" Table Length: %d\n", attr->info.linenum.table_length);
eprintf ("line.%d.sym=%s\n", bin->midx, bin->methods[bin->midx].name);
for (k=0; k<sz4; k++) {
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, 4);
attr->info.linenum.start_pc = R_BIN_JAVA_USHORT (buf, 0);
//eprintf (" %2d: start_pc: 0x%04x\n", k, attr->info.linenum.start_pc);
attr->info.linenum.line_number = R_BIN_JAVA_USHORT (buf, 2);
//eprintf (" line_number: %d\n", attr->info.linenum.line_number);
eprintf ("line.%d.%d.%d=0x%x\n", bin->midx, k,
attr->info.linenum.line_number,
attr->info.linenum.start_pc);
}
} else
if (!strcmp (name, "StackMapTable")) {
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, 2); // XXX: this is probably wrong
//printf(" StackMapTable: %d\n", USHORT(buf, 0));
} else
if (!strcmp (name, "LocalVariableTable")) {
int i;
ut32 lvtl = (ut32)read_short (bin);
eprintf ("local.%d.sym=%s\n", bin->midx, bin->methods[bin->midx].name);
for (i=0; i<lvtl; i++) {
int start_pc = start_pc = read_short (bin);
int length = length = read_short (bin);
int name_idx = name_idx = read_short (bin);
int desc_idx = desc_idx = read_short (bin);
int index = index = read_short (bin);
const char *name = get_cp (bin, name_idx-1)->value;
const char *desc = get_cp (bin, desc_idx-1)->value;
eprintf ("local.%d.%d.type=%s\n", bin->midx, i, desc);
eprintf ("local.%d.%d.name=%s\n", bin->midx, i, name);
}
} else
if (!strcmp (name, "ConstantValue")) {
attr->type = R_BIN_JAVA_TYPE_CONST;
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, 2);
#if 0
printf(" Name Index: %d\n", R_BIN_JAVA_USHORT(buf, 0)); // %s\n", R_BIN_JAVA_USHORT(buf, 0), cp_items[R_BIN_JAVA_USHORT(buf,0)-1].value);
printf(" AttributeLength: %d\n", R_BIN_JAVA_UINT(buf, 2));
#endif
attr->info.const_value_idx = R_BIN_JAVA_USHORT(buf, 0);
IFDBG printf (" ConstValueIndex: %d\n", attr->info.const_value_idx);
} else {
eprintf ("** ERROR ** Unknown section '%s'\n", name);
return R_FALSE;
}
}
}
return R_TRUE;
}
int java_classdump(const char *file, int verbose) {
RBinJavaClass2 cf2;
unsigned short sz, sz2;
int this_class;
char buf[0x9999];
int i,j;
FILE *fd = fopen(file, "rb");
if (fd == NULL)
return -1;
/* start parsing */
fread (&cf, 10, 1, fd); //sizeof(struct classfile), 1, fd);
if (memcmp (cf.cafebabe, "\xCA\xFE\xBA\xBE", 4)) {
eprintf ("java_classdump: Invalid header\n");
return -1;
}
javasm_init ();
/* show class version information */
V printf ("Version: 0x%02x%02x 0x%02x%02x\n",
cf.major[1],cf.major[0], cf.minor[1],cf.minor[0]);
cf.cp_count = r_num_ntohs(cf.cp_count);
if (cf.major[0]==cf.major[1] && cf.major[0]==0) {
eprintf ("Oops. this is a Mach-O\n");
return 0;
}
cf.cp_count--;
V printf ("ConstantPoolCount %d\n", cf.cp_count);
cp_items = malloc (sizeof (struct cp_item)*(cf.cp_count+1));
for (i=0;i<cf.cp_count;i++) {
struct constant_t *c;
fread (buf, 1, 1, fd);
c = NULL;
for (j=0; r_bin_java_constants[j].name; j++) {
if (r_bin_java_constants[j].tag == buf[0]) {
c = &r_bin_java_constants[j];
break;
}
}
if (c == NULL) {
eprintf ("Invalid tag '%d'\n", buf[0]);
return 0;
}
V eprintf (" %3d %s: ", i+1, c->name);
/* store constant pool item */
strcpy (cp_items[i].name, c->name);
cp_items[i].tag = c->tag;
cp_items[i].value = NULL; // no string by default
cp_items[i].off = ftell(fd)-1;
/* read bytes */
switch (c->tag) {
case 1: // utf 8 string
fread (buf, 2, 1, fd);
sz = USHORT (buf,0);
//cp_items[i].len = sz;
fread(buf, sz, 1, fd);
buf[sz] = '\0';
break;
default:
fread(buf, c->len, 1, fd);
}
memcpy (cp_items[i].bytes, buf, 5);
/* parse value */
switch(c->tag) {
case 1:
V printf ("%s\n", buf);
cp_items[i].value = strdup(buf);
break;
case 7:
V printf ("%d\n", USHORT(buf,0));
break;
case 8:
V printf ("string ptr %d\n", USHORT(buf, 0));
break;
case 9:
case 11:
case 10: // METHOD REF
V printf("class = %d, ", USHORT(buf,0));
V printf("name_type = %d\n", USHORT(buf,2));
break;
case 12:
V printf("name = %d, ", USHORT(buf,0));
V printf("descriptor = %d\n", USHORT(buf,2));
break;
default:
V printf("%d\n", UINT(buf, 40));
}
}
fread (&cf2, sizeof (RBinJavaClass2), 1, fd);
check_eof(fd);
V printf("Access flags: 0x%04x\n", cf2.access_flags);
this_class = r_num_ntohs (cf2.this_class);
V printf ("This class: %d\n", this_class);
check_eof (fd);
//printf("This class: %d (%s)\n", ntohs(cf2.this_class), cp_items[ntohs(cf2.this_class)-1].value); // XXX this is a double pointer !!1
//printf("Super class: %d (%s)\n", ntohs(cf2.super_class), cp_items[ntohs(cf2.super_class)-1].value);
sz = read_short (fd);
V printf ("Interfaces count: %d\n", sz);
if (sz>0) {
fread (buf, sz*2, 1, fd);
sz = read_short (fd);
for (i=0; i<sz; i++) {
eprintf ("interfaces: TODO\n");
}
}
sz = read_short(fd);
V printf("Fields count: %d\n", sz);
if (sz>0) {
for (i=0;i<sz;i++) {
fread(buf, 8, 1, fd);
V printf("%2d: Access Flags: %d\n", i, USHORT(buf, 0));
V printf(" Name Index: %d (%s)\n", USHORT(buf, 2), get_cp(USHORT(buf,2)-1)->value);
V printf(" Descriptor Index: %d\n", USHORT(buf, 4)); //, cp_items[USHORT(buf, 4)-1].value);
sz2 = USHORT(buf, 6);
V printf(" field Attributes Count: %d\n", sz2);
attributes_walk(fd, sz2, 1, verbose);
}
}
sz = read_short(fd);
V printf("Methods count: %d\n", sz);
if (sz>0) {
for (i=0;i<sz;i++) {
fread(buf, 8, 1, fd);
check_eof(fd);
V printf("%2d: Access Flags: %d\n", i, USHORT(buf, 0));
V printf(" Name Index: %d (%s)\n", USHORT(buf, 2), get_cp(USHORT(buf, 2)-1)->value);
V printf(" Descriptor Index: %d (%s)\n", USHORT(buf, 4), get_cp(USHORT(buf, 4)-1)->value);
sz2 = USHORT(buf, 6);
V printf(" method Attributes Count: %d\n", sz2);
attributes_walk(fd, sz2, 0, verbose);
}
}
fclose(fd);
return 0;
}
static int javasm_init(RBinJavaObj *bin) {
unsigned short sz, sz2;
char buf[0x4096];
int i, j;
/* Initialize structs */
bin->cp_items = NULL;
bin->fields = NULL;
bin->methods = NULL;
/* Initialize cp_null_item */
cp_null_item.tag = -1;
strncpy (cp_null_item.name, "(null)", sizeof (cp_null_item.name)-1);
cp_null_item.value = strdup ("(null)");
/* start parsing */
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)&bin->cf, 10); //sizeof(struct r_bin_java_classfile_t), 1, bin->fd);
if (memcmp (bin->cf.cafebabe, "\xCA\xFE\xBA\xBE", 4)) {
eprintf ("javasm_init: Invalid header (%02x %02x %02x %02x)\n",
bin->cf.cafebabe[0], bin->cf.cafebabe[1],
bin->cf.cafebabe[2], bin->cf.cafebabe[3]);
return R_FALSE;
}
bin->cf.cp_count = R_BIN_JAVA_SWAPUSHORT (bin->cf.cp_count);
if (bin->cf.major[0]==bin->cf.major[1] && bin->cf.major[0]==0) {
fprintf(stderr, "This is a MachO\n");
return R_FALSE;
}
bin->cf.cp_count--;
IFDBG printf ("ConstantPoolCount %d\n", bin->cf.cp_count);
bin->cp_items = malloc (sizeof (struct r_bin_java_cp_item_t)*(bin->cf.cp_count+1));
eprintf ("%d\n", bin->cf.cp_count);
for(i=0;i<bin->cf.cp_count;i++) {
struct constant_t *c;
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, 1);
c = NULL;
for (j=0; constants[j].name; j++) {
if (constants[j].tag == buf[0]) {
c = &constants[j];
break;
}
}
if (c == NULL) {
fprintf (stderr, "Invalid tag '%d' at offset 0x%08"PFMT64x"\n",
*buf, (ut64)bin->b->cur);
return R_FALSE;
}
IFDBG printf (" %3d %s: ", i+1, c->name);
/* store constant pool item */
strncpy (bin->cp_items[i].name, c->name, sizeof (bin->cp_items[i].name)-1);
bin->cp_items[i].ord = i+1;
bin->cp_items[i].tag = c->tag;
bin->cp_items[i].value = NULL; // no string by default
bin->cp_items[i].off = bin->b->cur-1;
/* read bytes */
switch (c->tag) {
case 1: // Utf8 string
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, 2);
sz = R_BIN_JAVA_USHORT (buf, 0);
bin->cp_items[i].length = sz;
bin->cp_items[i].off += 3;
if (sz<sizeof (buf)) {
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, sz);
buf[sz] = '\0';
} else {
eprintf ("Invalid utf8 length %d\n", sz);
buf[0] = 0;
}
break;
default:
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)buf, c->len);
}
memcpy (bin->cp_items[i].bytes, buf, 5);
/* parse value */
switch (c->tag) {
case 1:
// eprintf ("%s\n", buf);
bin->cp_items[i].value = strdup (buf);
break;
case 5:
case 6:
i += 2;
break;
case 7:
IFDBG eprintf ("%d\n", R_BIN_JAVA_USHORT (buf,0));
break;
case 8:
IFDBG printf("string ptr %d\n", R_BIN_JAVA_USHORT(buf, 0));
break;
case 9:
case 11:
case 10: // METHOD REF
IFDBG printf("class = %d, ", R_BIN_JAVA_USHORT(buf,0));
IFDBG printf("name_type = %d\n", R_BIN_JAVA_USHORT(buf,2));
break;
case 12:
IFDBG printf("name = %d, ", R_BIN_JAVA_USHORT(buf,0));
IFDBG printf("descriptor = %d\n", R_BIN_JAVA_USHORT(buf,2));
break;
default:
printf ("%d\n", R_BIN_JAVA_UINT (buf, 40));
}
}
r_buf_read_at (bin->b, R_BUF_CUR, (ut8*)&bin->cf2, sizeof(struct r_bin_java_classfile2_t));
IFDBG printf ("Access flags: 0x%04x\n", bin->cf2.access_flags);
bin->cf2.this_class = R_BIN_JAVA_SWAPUSHORT(bin->cf2.this_class);
IFDBG printf ("This class: %d\n", bin->cf2.this_class);
//printf("This class: %d (%s)\n", R_BIN_JAVA_SWAPUSHORT(bin->cf2.this_class), bin->cp_items[R_BIN_JAVA_SWAPUSHORT(bin->cf2.this_class)-1].value); // XXX this is a double pointer !!1
//printf("Super class: %d (%s)\n", R_BIN_JAVA_SWAPUSHORT(bin->cf2.super_class), bin->cp_items[R_BIN_JAVA_SWAPUSHORT(bin->cf2.super_class)-1].value);
sz = read_short(bin);
/* TODO: intefaces*/
IFDBG printf("Interfaces count: %d\n", sz);
if (sz>0) {
r_buf_read_at(bin->b, R_BUF_CUR, (ut8*)buf, sz*2);
sz = read_short(bin);
for(i=0;i<sz;i++) {
fprintf(stderr, "Interfaces: TODO\n");
}
}
sz = read_short(bin);
bin->fields_count = sz;
IFDBG printf("Fields count: %d\n", sz);
if (sz>0) {
bin->fields = malloc (1+sz * sizeof(struct r_bin_java_fm_t));
for (i=0;i<sz;i++) {
r_buf_read_at(bin->b, R_BUF_CUR, (ut8*)buf, 8);
bin->fields[i].flags = R_BIN_JAVA_USHORT(buf, 0);
IFDBG printf("%2d: Access Flags: %d\n", i, bin->fields[i].flags);
bin->fields[i].name_idx = R_BIN_JAVA_USHORT(buf, 2);
bin->fields[i].name = r_str_dup (NULL, (get_cp (bin, R_BIN_JAVA_USHORT(buf,2)-1))->value);
IFDBG printf(" Name Index: %d (%s)\n", bin->fields[i].name_idx, bin->fields[i].name);
bin->fields[i].descriptor_idx = R_BIN_JAVA_USHORT(buf, 4);
bin->fields[i].descriptor = NULL;
IFDBG printf(" Descriptor Index: %d\n", bin->fields[i].descriptor_idx); //, bin->cp_items[R_BIN_JAVA_USHORT(buf, 4)-1].value);
sz2 = R_BIN_JAVA_USHORT(buf, 6);
bin->fields[i].attr_count = sz2;
IFDBG printf(" field Attributes Count: %d\n", sz2);
if (sz2 > 0) {
bin->fields[i].attributes = malloc(1+sz2 * sizeof(struct r_bin_java_attr_t));
for(j=0;j<sz2;j++)
attributes_walk(bin, &bin->fields[i].attributes[j], sz2, 1);
}
}
}
sz = read_short(bin);
bin->methods_count = sz;
IFDBG printf("Methods count: %d\n", sz);
if (sz>0) {
bin->methods = malloc(sz * sizeof(struct r_bin_java_fm_t));
for (i=0;i<sz;i++) {
r_buf_read_at(bin->b, R_BUF_CUR, (ut8*)buf, 8);
bin->methods[i].flags = R_BIN_JAVA_USHORT(buf, 0);
IFDBG printf("%2d: Access Flags: %d\n", i, bin->methods[i].flags);
bin->methods[i].name_idx = R_BIN_JAVA_USHORT(buf, 2);
#if OLD
bin->methods[i].name = r_str_dup (NULL, (get_cp(bin, R_BIN_JAVA_USHORT(buf, 2)-1))->value);
#else
bin->methods[i].name = malloc (1024);
// XXX: can null ptr here
snprintf (bin->methods[i].name, 1023, "%s%s",
(get_cp (bin, R_BIN_JAVA_USHORT (buf, 2)-1))->value,
(get_cp (bin, R_BIN_JAVA_USHORT (buf, 2)))->value);
#endif
bin->midx = i;
IFDBG printf(" Name Index: %d (%s)\n", bin->methods[i].name_idx, bin->methods[i].name);
bin->methods[i].descriptor_idx = R_BIN_JAVA_USHORT (buf, 4);
bin->methods[i].descriptor = r_str_dup (NULL, (get_cp(bin, R_BIN_JAVA_USHORT(buf, 4)-1))->value);
IFDBG printf(" Descriptor Index: %d (%s)\n", bin->methods[i].descriptor_idx, bin->methods[i].descriptor);
sz2 = R_BIN_JAVA_USHORT(buf, 6);
bin->methods[i].attr_count = sz2;
IFDBG printf(" method Attributes Count: %d\n", sz2);
if (sz2 > 0) {
bin->methods[i].attributes = malloc (1+sz2 * sizeof (struct r_bin_java_attr_t));
for (j=0; j<sz2; j++) {
if (!attributes_walk (bin, &bin->methods[i].attributes[j], sz2, 0))
return R_FALSE;
}
}
}
}
return R_TRUE;
}
static int attributes_walk(FILE *fd, int sz2, int fields, int verbose) {
char *name, buf[99999];
int sz, k, j=0;
for (j=0;j<sz2;j++) {
fread(buf, 6, 1, fd);
name = (get_cp (USHORT(buf,0)-1))->value;
V printf(" %2d: Name Index: %d (%s)\n", j, USHORT(buf,0), name);
// TODO add comment with constant pool index
if (fields) {
V printf("FIELD\n");
} else {
V printf (" Length: %d\n", UINT (buf, 2));
if (!name) {
printf ("**ERROR ** Cannot identify attribute name into constant pool\n");
continue;
}
if (!strcmp (name, "Code")) {
fread(buf, 8, 1, fd);
V printf(" Max Stack: %d\n", USHORT(buf, 0));
V printf(" Max Locals: %d\n", USHORT(buf, 2));
V printf(" Code Length: %d\n", UINT(buf, 4));
V printf(" Code At Offset: 0x%08"PFMT64x"\n", (ut64)ftell(fd));
fread(buf, UINT(buf, 4), 1, fd); // READ CODE
sz = read_short(fd);
V printf(" Exception table length: %d\n", sz);
for (k=0;k<sz;k++) {
fread(buf, 8, 1, fd);
V printf(" start_pc: 0x%04x\n", USHORT(buf,0));
V printf(" end_pc: 0x%04x\n", USHORT(buf,2));
V printf(" handler_pc: 0x%04x\n", USHORT(buf,4));
V printf(" catch_type: %d\n", USHORT(buf,6));
}
sz = (int)read_short(fd);
V printf(" code Attributes_count: %d\n", sz);
if (sz>0)
attributes_walk(fd, sz, fields, verbose);
} else
if (!strcmp(name, "LineNumberTable")) {
sz = (int)read_short(fd);
V printf(" Table Length: %d\n", sz);
for(k=0;k<sz;k++) {
fread(buf, 4, 1, fd);
V printf(" %2d: start_pc: 0x%04x\n", k, USHORT(buf, 0));
V printf(" line_number: %d\n", USHORT(buf, 2));
}
} else
if (!strcmp(name, "StackMapTable")) {
fread (buf, 2, 1, fd);
V printf(" StackMapTable: %d\n", USHORT(buf, 0));
} else
if (!strcmp (name, "LocalVariableTable")) {
int i;
ut32 lvtl = (ut32)read_short (fd);
for (i=0; i<lvtl; i++) {
int start_pc = start_pc = read_short (fd);
int length = length = read_short (fd);
int name_idx = name_idx = read_short (fd);
int desc_idx = desc_idx = read_short (fd);
int index = index = read_short (fd);
}
} else
if (!strcmp(name, "ConstantValue")) {
fread(buf, 2, 1, fd);
#if 0
printf(" Name Index: %d\n", USHORT(buf, 0)); // %s\n", USHORT(buf, 0), cp_items[USHORT(buf,0)-1].value);
printf(" AttributeLength: %d\n", UINT(buf, 2));
#endif
V printf(" ConstValueIndex: %d\n", USHORT(buf, 0));
} else {
fprintf (stderr, "** ERROR ** Unknown section '%s'\n", name);
return 1;
}
}
}
return 0;
}
