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#include "adb.h"
#include <stdio.h>
#include <unistd.h>
#include "apk_adb.h"
#include "apk_applet.h"
#include "apk_print.h"
struct adb_walk_ctx {
struct adb_walk *d;
struct apk_trust *trust;
struct adb db;
struct adb_verify_ctx vfy;
};
static int adb_walk_block(struct adb *db, struct adb_block *b, struct apk_istream *is);
static int dump_object(struct adb_walk_ctx *ctx, const struct adb_object_schema *schema, adb_val_t v);
static int dump_item(struct adb_walk_ctx *ctx, const char *name, const uint8_t *kind, adb_val_t v)
{
struct adb_walk *d = ctx->d;
struct adb origdb;
struct adb_obj o;
struct adb_object_schema *obj_schema;
struct apk_istream is;
char tmp[256];
apk_blob_t b;
if (v == ADB_VAL_NULL) return 0;
d->ops->key(d, name ? APK_BLOB_STR(name) : APK_BLOB_NULL);
switch (*kind) {
case ADB_KIND_ARRAY:
obj_schema = container_of(kind, struct adb_object_schema, kind);
adb_r_obj(&ctx->db, v, &o, obj_schema);
//if (!adb_ra_num(&o)) return 0;
d->ops->start_array(d, adb_ra_num(&o));
for (size_t i = ADBI_FIRST; i <= adb_ra_num(&o); i++) {
dump_item(ctx, NULL, obj_schema->fields[0].kind, adb_ro_val(&o, i));
}
d->ops->end(d);
break;
case ADB_KIND_ADB:
apk_istream_from_blob(&is, adb_r_blob(&ctx->db, v));
origdb = ctx->db;
d->ops->start_object(d);
adb_m_process(&ctx->db, &is,
container_of(kind, struct adb_adb_schema, kind)->schema_id | ADB_SCHEMA_IMPLIED,
0, adb_walk_block);
d->ops->end(d);
ctx->db = origdb;
break;
case ADB_KIND_OBJECT:;
struct adb_object_schema *object = container_of(kind, struct adb_object_schema, kind);
if (!object->tostring) {
d->ops->start_object(d);
dump_object(ctx, object, v);
d->ops->end(d);
} else {
dump_object(ctx, object, v);
}
break;
case ADB_KIND_BLOB:
case ADB_KIND_INT:;
struct adb_scalar_schema *scalar = container_of(kind, struct adb_scalar_schema, kind);
if (scalar->tostring) {
b = scalar->tostring(&ctx->db, v, tmp, sizeof tmp);
} else {
b = APK_BLOB_STR("(unknown)");
}
if (!APK_BLOB_IS_NULL(b))
d->ops->scalar(d, b, scalar->multiline);
break;
}
return 0;
}
static int dump_object(struct adb_walk_ctx *ctx, const struct adb_object_schema *schema, adb_val_t v)
{
size_t schema_len = 0;
struct adb_obj o;
char tmp[256];
apk_blob_t b;
struct adb_walk *d = ctx->d;
adb_r_obj(&ctx->db, v, &o, schema);
if (schema) {
if (schema->tostring) {
b = schema->tostring(&o, tmp, sizeof tmp);
if (!APK_BLOB_IS_NULL(b))
d->ops->scalar(d, b, 0);
return 0;
}
schema_len = schema->num_fields;
}
for (size_t i = ADBI_FIRST; i < adb_ro_num(&o); i++) {
adb_val_t val = adb_ro_val(&o, i);
if (val == ADB_NULL) continue;
if (i < schema_len && schema->fields[i-1].kind != 0) {
dump_item(ctx, schema->fields[i-1].name, schema->fields[i-1].kind, val);
}
}
return 0;
}
static int adb_walk_block(struct adb *db, struct adb_block *b, struct apk_istream *is)
{
struct adb_walk_ctx *ctx = container_of(db, struct adb_walk_ctx, db);
struct adb_walk *d = ctx->d;
char tmp[160];
struct adb_hdr *hdr;
struct adb_sign_hdr *s;
uint32_t schema_magic = ctx->db.schema;
const struct adb_db_schema *ds;
size_t sz = adb_block_length(b);
apk_blob_t data, c = APK_BLOB_BUF(tmp);
int r;
switch (adb_block_type(b)) {
case ADB_BLOCK_ADB:
d->ops->schema(d, db->schema);
for (ds = d->schemas; ds->magic; ds++)
if (ds->magic == schema_magic) break;
hdr = apk_istream_peek(is, sizeof *hdr);
if (IS_ERR(hdr)) return PTR_ERR(hdr);
apk_blob_push_fmt(&c, "ADB block, size: %zu, compat: %d, ver: %d",
sz, hdr->adb_compat_ver, hdr->adb_ver);
d->ops->comment(d, apk_blob_pushed(APK_BLOB_BUF(tmp), c));
if (ds->root && hdr->adb_compat_ver == 0) dump_object(ctx, ds->root, adb_r_root(db));
return 0;
case ADB_BLOCK_SIG:
s = (struct adb_sign_hdr*) apk_istream_get(is, sz);
data = APK_BLOB_PTR_LEN((char*)s, sz);
r = adb_trust_verify_signature(ctx->trust, db, &ctx->vfy, data);
apk_blob_push_fmt(&c, "sig v%02x h%02x ", s->sign_ver, s->hash_alg);
for (size_t j = sizeof *s; j < data.len && c.len > 40; j++)
apk_blob_push_fmt(&c, "%02x", (uint8_t)data.ptr[j]);
if (c.len <= 40) apk_blob_push_blob(&c, APK_BLOB_STRLIT(".."));
apk_blob_push_fmt(&c, ": %s", r ? apk_error_str(r) : "OK");
break;
case ADB_BLOCK_DATA:
apk_blob_push_fmt(&c, "data block, size: %zu", sz);
break;
default:
apk_blob_push_fmt(&c, "unknown block %d, size: %zu", adb_block_type(b), sz);
break;
}
d->ops->comment(d, apk_blob_pushed(APK_BLOB_BUF(tmp), c));
return 0;
}
int adb_walk_adb(struct adb_walk *d, struct apk_istream *is, struct apk_trust *trust)
{
struct adb_walk_ctx ctx = {
.d = d,
.trust = trust,
};
int r;
if (IS_ERR(is)) return PTR_ERR(is);
r = adb_m_process(&ctx.db, is, 0, 0, adb_walk_block);
adb_free(&ctx.db);
return r;
}
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