package.c 22.4 KB
Newer Older
1 2 3 4 5 6
/* package.c - Alpine Package Keeper (APK)
 *
 * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
 * Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
 * All rights reserved.
 *
7
 * This program is free software; you can redistribute it and/or modify it
8 9 10 11
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation. See http://www.gnu.org/ for details.
 */

12
#include <errno.h>
13 14 15
#include <fcntl.h>
#include <ctype.h>
#include <stdio.h>
16
#include <limits.h>
17 18 19 20 21 22
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>

Timo Teräs's avatar
Timo Teräs committed
23 24
#include <openssl/pem.h>

25 26 27 28 29 30
#include "apk_defines.h"
#include "apk_archive.h"
#include "apk_package.h"
#include "apk_database.h"
#include "apk_state.h"

31
struct apk_package *apk_pkg_new(void)
32 33 34 35 36 37 38 39 40 41
{
	struct apk_package *pkg;

	pkg = calloc(1, sizeof(struct apk_package));
	if (pkg != NULL)
		list_init(&pkg->installed_pkgs_list);

	return pkg;
}

42 43 44 45 46 47
int apk_pkg_parse_name(apk_blob_t apkname,
		       apk_blob_t *name,
		       apk_blob_t *version)
{
	int i, dash = 0;

48 49 50
	if (APK_BLOB_IS_NULL(apkname))
		return -1;

51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
	for (i = apkname.len - 2; i >= 0; i--) {
		if (apkname.ptr[i] != '-')
			continue;
		if (isdigit(apkname.ptr[i+1]))
			break;
		if (++dash >= 2)
			return -1;
	}
	if (name != NULL)
		*name = APK_BLOB_PTR_LEN(apkname.ptr, i);
	if (version != NULL)
		*version = APK_BLOB_PTR_PTR(&apkname.ptr[i+1],
					    &apkname.ptr[apkname.len-1]);

	return 0;
}

Timo Teräs's avatar
Timo Teräs committed
68
static apk_blob_t trim(apk_blob_t str)
69 70
{
	if (str.ptr == NULL || str.len < 1)
Timo Teräs's avatar
Timo Teräs committed
71
		return str;
72

73 74
	if (str.ptr[str.len-1] == '\n') {
		str.ptr[str.len-1] = 0;
Timo Teräs's avatar
Timo Teräs committed
75
		return APK_BLOB_PTR_LEN(str.ptr, str.len-1);
76
	}
77

Timo Teräs's avatar
Timo Teräs committed
78
	return str;
79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
}

int apk_deps_add(struct apk_dependency_array **depends,
		 struct apk_dependency *dep)
{
	struct apk_dependency_array *deps = *depends;
	int i;

	if (deps != NULL) {
		for (i = 0; i < deps->num; i++) {
			if (deps->item[i].name == dep->name)
				return 0;
		}
	}

	*apk_dependency_array_add(depends) = *dep;
	return 0;
}
Timo Teräs's avatar
Timo Teräs committed
97

98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116
void apk_deps_del(struct apk_dependency_array **pdeps,
		  struct apk_name *name)
{
	struct apk_dependency_array *deps = *pdeps;
	int i;

	if (deps == NULL)
		return;

	for (i = 0; i < deps->num; i++) {
		if (deps->item[i].name != name)
			continue;

		deps->item[i] = deps->item[deps->num-1];
		*pdeps = apk_dependency_array_resize(deps, deps->num-1);
		break;
	}
}

117 118 119 120 121 122 123 124 125 126
struct parse_depend_ctx {
	struct apk_database *db;
	struct apk_dependency_array **depends;
};

static int parse_depend(void *ctx, apk_blob_t blob)
{
	struct parse_depend_ctx *pctx = (struct parse_depend_ctx *) ctx;
	struct apk_dependency *dep;
	struct apk_name *name;
127 128
	apk_blob_t bname, bop, bver = APK_BLOB_NULL;
	int mask = APK_VERSION_LESS | APK_VERSION_EQUAL | APK_VERSION_GREATER;
129 130 131 132

	if (blob.len == 0)
		return 0;

133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
	/* [!]name[<,<=,=,>=,>]ver */
	if (blob.ptr[0] == '!') {
		mask = 0;
		blob.ptr++;
		blob.len--;
	}
	if (apk_blob_cspn(blob, "<>=", &bname, &bop)) {
		int i;

		if (mask == 0)
			return -1;
		if (!apk_blob_spn(bop, "<>=", &bop, &bver))
			return -1;
		for (i = 0; i < blob.len; i++) {
			switch (blob.ptr[i]) {
			case '<':
				mask |= APK_VERSION_LESS;
				break;
			case '>':
				mask |= APK_VERSION_GREATER;
				break;
			case '=':
				mask |= APK_VERSION_EQUAL;
				break;
			}
		}
		if ((mask & (APK_VERSION_LESS|APK_VERSION_GREATER))
		    == (APK_VERSION_LESS|APK_VERSION_GREATER))
			return -1;

		if (!apk_version_validate(bver))
			return -1;
	}

167 168 169 170 171 172 173 174 175 176
	name = apk_db_get_name(pctx->db, blob);
	if (name == NULL)
		return -1;

	dep = apk_dependency_array_add(pctx->depends);
	if (dep == NULL)
		return -1;

	*dep = (struct apk_dependency){
		.name = name,
177 178
		.version = APK_BLOB_IS_NULL(bver) ? NULL : apk_blob_cstr(bver),
		.result_mask = mask,
179 180 181 182 183
	};

	return 0;
}

184 185 186 187
void apk_deps_parse(struct apk_database *db,
		    struct apk_dependency_array **depends,
		    apk_blob_t blob)
{
188
	struct parse_depend_ctx ctx = { db, depends };
189

190 191
	if (blob.len > 1 && blob.ptr[blob.len-1] == '\n')
		blob.len--;
192

193
	apk_blob_for_each_segment(blob, " ", parse_depend, &ctx);
194 195
}

196 197
int apk_deps_write(struct apk_dependency_array *deps, struct apk_ostream *os)
{
198
	int i, r, n = 0;
199 200 201 202 203 204 205 206 207 208 209

	if (deps == NULL)
		return 0;

	for (i = 0; i < deps->num; i++) {
		if (i) {
			if (os->write(os, " ", 1) != 1)
				return -1;
			n += 1;
		}

210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
		if (deps->item[i].result_mask == APK_DEPMASK_CONFLICT) {
			if (os->write(os, "!", 1) != 1)
				return -1;
			n += 1;
		}

		r = apk_ostream_write_string(os, deps->item[i].name->name);
		if (r < 0)
			return r;
		n += r;

		if (deps->item[i].result_mask != APK_DEPMASK_CONFLICT &&
		    deps->item[i].result_mask != APK_DEPMASK_REQUIRE) {
			r = apk_ostream_write_string(os, apk_version_op_string(deps->item[i].result_mask));
			if (r < 0)
				return r;
			n += r;

			r = apk_ostream_write_string(os, deps->item[i].version);
			if (r < 0)
				return r;
			n += r;
		}
233 234 235 236 237
	}

	return n;
}

Timo Teräs's avatar
Timo Teräs committed
238
const char *apk_script_types[] = {
239 240 241 242 243 244 245 246 247 248 249 250
	[APK_SCRIPT_PRE_INSTALL]	= "pre-install",
	[APK_SCRIPT_POST_INSTALL]	= "post-install",
	[APK_SCRIPT_PRE_DEINSTALL]	= "pre-deinstall",
	[APK_SCRIPT_POST_DEINSTALL]	= "post-deinstall",
	[APK_SCRIPT_PRE_UPGRADE]	= "pre-upgrade",
	[APK_SCRIPT_POST_UPGRADE]	= "post-upgrade",
};

int apk_script_type(const char *name)
{
	int i;

Timo Teräs's avatar
Timo Teräs committed
251 252 253
	for (i = 0; i < ARRAY_SIZE(apk_script_types); i++)
		if (apk_script_types[i] &&
		    strcmp(apk_script_types[i], name) == 0)
254 255
			return i;

256
	return APK_SCRIPT_INVALID;
257 258
}

259 260
void apk_sign_ctx_init(struct apk_sign_ctx *ctx, int action,
		       struct apk_checksum *identity)
Timo Teräs's avatar
Timo Teräs committed
261 262
{
	memset(ctx, 0, sizeof(struct apk_sign_ctx));
Timo Teräs's avatar
Timo Teräs committed
263 264
	ctx->action = action;
	switch (action) {
265 266 267 268 269
	case APK_SIGN_NONE:
		ctx->md = EVP_md_null();
		ctx->control_started = 1;
		ctx->data_started = 1;
		break;
Timo Teräs's avatar
Timo Teräs committed
270 271 272
	case APK_SIGN_VERIFY:
		ctx->md = EVP_md_null();
		break;
273 274 275 276 277 278 279 280 281 282
	case APK_SIGN_VERIFY_IDENTITY:
		if (identity->type == APK_CHECKSUM_MD5) {
			ctx->md = EVP_md5();
			ctx->control_started = 1;
			ctx->data_started = 1;
		} else {
			ctx->md = EVP_sha1();
		}
		memcpy(&ctx->identity, identity, sizeof(ctx->identity));
		break;
Timo Teräs's avatar
Timo Teräs committed
283 284
	case APK_SIGN_GENERATE_V1:
		ctx->md = EVP_md5();
Timo Teräs's avatar
Timo Teräs committed
285 286
		ctx->control_started = 1;
		ctx->data_started = 1;
Timo Teräs's avatar
Timo Teräs committed
287 288 289 290 291 292 293
		break;
	case APK_SIGN_GENERATE:
	default:
		action = APK_SIGN_GENERATE;
		ctx->md = EVP_sha1();
		break;
	}
294 295 296
	EVP_MD_CTX_init(&ctx->mdctx);
	EVP_DigestInit_ex(&ctx->mdctx, ctx->md, NULL);
	EVP_MD_CTX_set_flags(&ctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
Timo Teräs's avatar
Timo Teräs committed
297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314
}


void apk_sign_ctx_free(struct apk_sign_ctx *ctx)
{
	if (ctx->signature.data.ptr != NULL)
		free(ctx->signature.data.ptr);
	if (ctx->signature.pkey != NULL)
		EVP_PKEY_free(ctx->signature.pkey);
}

int apk_sign_ctx_process_file(struct apk_sign_ctx *ctx,
			      const struct apk_file_info *fi,
			      struct apk_istream *is)
{
	if (ctx->data_started)
		return 1;

315
	if (fi->name[0] != '.' || strchr(fi->name, '/') != NULL) {
Timo Teräs's avatar
Timo Teräs committed
316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
		ctx->data_started = 1;
		ctx->control_started = 1;
		return 1;
	}

	if (ctx->control_started)
		return 1;

	if (strncmp(fi->name, ".SIGN.", 6) != 0) {
		ctx->control_started = 1;
		return 1;
	}

	/* A signature file */
	ctx->num_signatures++;

	/* Found already a trusted key */
	if (ctx->signature.pkey != NULL)
		return 0;

	if (strncmp(&fi->name[6], "RSA.", 4) == 0 ||
	    strncmp(&fi->name[6], "DSA.", 4) == 0) {
		char file[256];
	        BIO *bio = BIO_new(BIO_s_file());
		snprintf(file, sizeof(file), "/etc/apk/keys/%s", &fi->name[10]);
		if (BIO_read_filename(bio, file) > 0)
			ctx->signature.pkey =
				PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL);
		if (ctx->signature.pkey != NULL) {
			if (fi->name[6] == 'R')
				ctx->md = EVP_sha1();
			else
				ctx->md = EVP_dss1();
		}
		BIO_free(bio);
	} else
		return 0;

	if (ctx->signature.pkey != NULL)
		ctx->signature.data = apk_blob_from_istream(is, fi->size);

	return 0;
}

360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399
static int read_datahash(void *ctx, apk_blob_t line)
{
	struct apk_sign_ctx *sctx = (struct apk_sign_ctx *) ctx;
	apk_blob_t l, r;

	if (line.ptr == NULL || line.len < 1 || line.ptr[0] == '#')
		return 0;

	if (!apk_blob_split(line, APK_BLOB_STR(" = "), &l, &r))
		return 0;

	if (sctx->data_started == 0 &&
	    apk_blob_compare(APK_BLOB_STR("datahash"), l) == 0) {
		sctx->has_data_checksum = 1;
		sctx->md = EVP_sha256();
		apk_blob_pull_hexdump(
			&r, APK_BLOB_PTR_LEN(sctx->data_checksum,
					     EVP_MD_size(sctx->md)));
	}

	return 0;
}

int apk_sign_ctx_verify_tar(void *sctx, const struct apk_file_info *fi,
			    struct apk_istream *is)
{
	struct apk_sign_ctx *ctx = (struct apk_sign_ctx *) sctx;

	if (apk_sign_ctx_process_file(ctx, fi, is) == 0)
		return 0;

	if (strcmp(fi->name, ".PKGINFO") == 0) {
		apk_blob_t blob = apk_blob_from_istream(is, fi->size);
		apk_blob_for_each_segment(blob, "\n", read_datahash, ctx);
		free(blob.ptr);
	}

	return 0;
}

400
int apk_sign_ctx_mpart_cb(void *ctx, int part, apk_blob_t data)
Timo Teräs's avatar
Timo Teräs committed
401 402 403 404 405 406
{
	struct apk_sign_ctx *sctx = (struct apk_sign_ctx *) ctx;
	unsigned char calculated[EVP_MAX_MD_SIZE];
	int r;

	switch (part) {
407 408 409
	case APK_MPART_DATA:
		EVP_MD_CTX_clear_flags(&sctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
		EVP_DigestUpdate(&sctx->mdctx, data.ptr, data.len);
Timo Teräs's avatar
Timo Teräs committed
410 411
		break;
	case APK_MPART_BOUNDARY:
412 413
		EVP_DigestUpdate(&sctx->mdctx, data.ptr, data.len);

Timo Teräs's avatar
Timo Teräs committed
414 415 416
		/* We are not interested about checksums of signature,
		 * reset checksum if we are still in signatures */
		if (!sctx->control_started) {
417 418 419
			EVP_DigestFinal_ex(&sctx->mdctx, calculated, NULL);
			EVP_DigestInit_ex(&sctx->mdctx, sctx->md, NULL);
			EVP_MD_CTX_set_flags(&sctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
Timo Teräs's avatar
Timo Teräs committed
420 421 422 423 424 425 426 427 428
			return 0;
		}

		/* Are we in control part?. */
		if ((!sctx->control_started) || sctx->data_started)
			return 0;

		/* End of control block, make sure rest is handled as data */
		sctx->data_started = 1;
429 430
		if (!sctx->has_data_checksum)
			return 0;
Timo Teräs's avatar
Timo Teräs committed
431 432 433 434

		/* Verify the signature if we have public key */
		if (sctx->action == APK_SIGN_VERIFY &&
		    sctx->signature.pkey != NULL) {
435
			r = EVP_VerifyFinal(&sctx->mdctx,
Timo Teräs's avatar
Timo Teräs committed
436 437 438 439
					   (unsigned char *) sctx->signature.data.ptr,
					   sctx->signature.data.len,
					   sctx->signature.pkey);
			if (r != 1)
440
				return -1;
Timo Teräs's avatar
Timo Teräs committed
441 442

			sctx->control_verified = 1;
443 444
			EVP_DigestInit_ex(&sctx->mdctx, sctx->md, NULL);
			EVP_MD_CTX_set_flags(&sctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
Timo Teräs's avatar
Timo Teräs committed
445
			return 0;
446
		} else if (sctx->action == APK_SIGN_GENERATE) {
Timo Teräs's avatar
Timo Teräs committed
447
			/* Package identity is checksum of control block */
448 449
			sctx->identity.type = EVP_MD_CTX_size(&sctx->mdctx);
			EVP_DigestFinal_ex(&sctx->mdctx, sctx->identity.data, NULL);
450
			return -1000;
Timo Teräs's avatar
Timo Teräs committed
451 452
		} else {
			/* Reset digest for hashing data */
453 454 455
			EVP_DigestFinal_ex(&sctx->mdctx, calculated, NULL);
			EVP_DigestInit_ex(&sctx->mdctx, sctx->md, NULL);
			EVP_MD_CTX_set_flags(&sctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
456 457 458

			if (sctx->action == APK_SIGN_VERIFY_IDENTITY) {
				if (memcmp(calculated, sctx->identity.data,
459 460 461
					   sctx->identity.type) != 0)
					return -1;
				sctx->control_verified = 1;
462
			}
Timo Teräs's avatar
Timo Teräs committed
463 464 465
		}
		break;
	case APK_MPART_END:
466 467 468
		if (sctx->has_data_checksum) {
			/* Check that data checksum matches */
			EVP_DigestFinal_ex(&sctx->mdctx, calculated, NULL);
469
			if (EVP_MD_CTX_size(&sctx->mdctx) == 0 ||
470
			    memcmp(calculated, sctx->data_checksum,
471 472 473
			           EVP_MD_CTX_size(&sctx->mdctx)) != 0)
				return -1;
			sctx->data_verified = 1;
474 475
		} else if (sctx->action == APK_SIGN_VERIFY) {
			if (sctx->signature.pkey == NULL)
476
				return -1;
477 478 479 480 481 482

			/* Assume that the data is fully signed */
			r = EVP_VerifyFinal(&sctx->mdctx,
				   (unsigned char *) sctx->signature.data.ptr,
				   sctx->signature.data.len,
				   sctx->signature.pkey);
483 484 485 486 487 488 489 490 491 492 493 494 495
			if (r != 1)
				return -1;

			sctx->control_verified = 1;
			sctx->data_verified = 1;
		} else if (sctx->action == APK_SIGN_VERIFY_IDENTITY) {
			EVP_DigestFinal_ex(&sctx->mdctx, calculated, NULL);
			if (EVP_MD_CTX_size(&sctx->mdctx) == 0 ||
			    memcmp(calculated, sctx->identity.data,
			           EVP_MD_CTX_size(&sctx->mdctx)) != 0)
				return -1;
			sctx->control_verified = 1;
			sctx->data_verified = 1;
496
		} else {
Timo Teräs's avatar
Timo Teräs committed
497
			/* Package identity is checksum of all data */
498 499
			sctx->identity.type = EVP_MD_CTX_size(&sctx->mdctx);
			EVP_DigestFinal_ex(&sctx->mdctx, sctx->identity.data, NULL);
Timo Teräs's avatar
Timo Teräs committed
500
		}
501
		break;
Timo Teräs's avatar
Timo Teräs committed
502 503 504 505
	}
	return 0;
}

506 507 508
struct read_info_ctx {
	struct apk_database *db;
	struct apk_package *pkg;
Timo Teräs's avatar
Timo Teräs committed
509 510
	struct apk_sign_ctx *sctx;
	int version;
511
	int has_install : 1;
512 513
};

514 515
int apk_pkg_add_info(struct apk_database *db, struct apk_package *pkg,
		     char field, apk_blob_t value)
Timo Teräs's avatar
Timo Teräs committed
516 517 518
{
	switch (field) {
	case 'P':
519
		pkg->name = apk_db_get_name(db, value);
Timo Teräs's avatar
Timo Teräs committed
520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536
		break;
	case 'V':
		pkg->version = apk_blob_cstr(value);
		break;
	case 'T':
		pkg->description = apk_blob_cstr(value);
		break;
	case 'U':
		pkg->url = apk_blob_cstr(value);
		break;
	case 'L':
		pkg->license = apk_blob_cstr(value);
		break;
	case 'D':
		apk_deps_parse(db, &pkg->depends, value);
		break;
	case 'C':
Timo Teräs's avatar
Timo Teräs committed
537
		apk_blob_pull_csum(&value, &pkg->csum);
Timo Teräs's avatar
Timo Teräs committed
538 539
		break;
	case 'S':
540
		pkg->size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
541 542
		break;
	case 'I':
543
		pkg->installed_size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
544
		break;
545 546
	default:
		return -1;
Timo Teräs's avatar
Timo Teräs committed
547
	}
548 549
	if (APK_BLOB_IS_NULL(value))
		return -1;
Timo Teräs's avatar
Timo Teräs committed
550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573
	return 0;
}

static int read_info_line(void *ctx, apk_blob_t line)
{
	static struct {
		const char *str;
		char field;
	} fields[] = {
		{ "pkgname", 'P' },
		{ "pkgver",  'V' },
		{ "pkgdesc", 'T' },
		{ "url",     'U' },
		{ "size",    'I' },
		{ "license", 'L' },
		{ "depend",  'D' },
	};
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
	apk_blob_t l, r;
	int i;

	if (line.ptr == NULL || line.len < 1 || line.ptr[0] == '#')
		return 0;

574
	if (!apk_blob_split(line, APK_BLOB_STR(" = "), &l, &r))
Timo Teräs's avatar
Timo Teräs committed
575 576 577
		return 0;

	for (i = 0; i < ARRAY_SIZE(fields); i++) {
578
		if (apk_blob_compare(APK_BLOB_STR(fields[i].str), l) == 0) {
579
			apk_pkg_add_info(ri->db, ri->pkg, fields[i].field, r);
580
			return 0;
Timo Teräs's avatar
Timo Teräs committed
581 582 583
		}
	}

Timo Teräs's avatar
Timo Teräs committed
584 585 586 587 588 589 590 591
	if (ri->sctx->data_started == 0 &&
	    apk_blob_compare(APK_BLOB_STR("datahash"), l) == 0) {
		ri->sctx->has_data_checksum = 1;
		ri->sctx->md = EVP_sha256();
		apk_blob_pull_hexdump(
			&r, APK_BLOB_PTR_LEN(ri->sctx->data_checksum,
					     EVP_MD_size(ri->sctx->md)));
	}
592

Timo Teräs's avatar
Timo Teräs committed
593 594 595
	return 0;
}

596
static int read_info_entry(void *ctx, const struct apk_file_info *ae,
597
			   struct apk_istream *is)
598
{
Timo Teräs's avatar
Timo Teräs committed
599 600 601 602 603
	static struct {
		const char *str;
		char field;
	} fields[] = {
		{ "DESC",	'T' },
604
		{ "WWW",	'U' },
Timo Teräs's avatar
Timo Teräs committed
605 606 607
		{ "LICENSE",	'L' },
		{ "DEPEND", 	'D' },
	};
608 609 610 611
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
	struct apk_database *db = ri->db;
	struct apk_package *pkg = ri->pkg;
	apk_blob_t name, version;
612
	char *slash;
Timo Teräs's avatar
Timo Teräs committed
613
	int i;
614

Timo Teräs's avatar
Timo Teräs committed
615
	/* Meta info and scripts */
Timo Teräs's avatar
Timo Teräs committed
616 617
	if (apk_sign_ctx_process_file(ri->sctx, ae, is) == 0)
		return 0;
618

Timo Teräs's avatar
Timo Teräs committed
619
	if (ae->name[0] == '.') {
Timo Teräs's avatar
Timo Teräs committed
620 621
		/* APK 2.0 format */
		if (strcmp(ae->name, ".PKGINFO") == 0) {
622
			apk_blob_t blob = apk_blob_from_istream(is, ae->size);
Timo Teräs's avatar
Timo Teräs committed
623 624
			apk_blob_for_each_segment(blob, "\n", read_info_line, ctx);
			free(blob.ptr);
625 626
			ri->version = 2;
		} else if (strcmp(ae->name, ".INSTALL") == 0) {
627 628
			apk_warning("Package '%s-%s' contains deprecated .INSTALL",
				    pkg->name->name, pkg->version);
Timo Teräs's avatar
Timo Teräs committed
629
		}
630 631 632 633
		return 0;
	}

	if (strncmp(ae->name, "var/db/apk/", 11) == 0) {
Timo Teräs's avatar
Timo Teräs committed
634
		/* APK 1.0 format */
635
		ri->version = 1;
Timo Teräs's avatar
Timo Teräs committed
636 637
		if (!S_ISREG(ae->mode))
			return 0;
638

Timo Teräs's avatar
Timo Teräs committed
639 640 641
		slash = strchr(&ae->name[11], '/');
		if (slash == NULL)
			return 0;
642

Timo Teräs's avatar
Timo Teräs committed
643 644 645
		if (apk_pkg_parse_name(APK_BLOB_PTR_PTR(&ae->name[11], slash-1),
				       &name, &version) < 0)
			return -1;
646

647 648
		if (pkg->name == NULL)
			pkg->name = apk_db_get_name(db, name);
Timo Teräs's avatar
Timo Teräs committed
649 650 651 652 653
		if (pkg->version == NULL)
			pkg->version = apk_blob_cstr(version);

		for (i = 0; i < ARRAY_SIZE(fields); i++) {
			if (strcmp(fields[i].str, slash+1) == 0) {
654
				apk_blob_t blob = apk_blob_from_istream(is, ae->size);
655 656
				apk_pkg_add_info(ri->db, ri->pkg, fields[i].field,
						 trim(blob));
Timo Teräs's avatar
Timo Teräs committed
657 658 659
				free(blob.ptr);
				break;
			}
660
		}
Timo Teräs's avatar
Timo Teräs committed
661 662 663
		if (apk_script_type(slash+1) == APK_SCRIPT_POST_INSTALL ||
		    apk_script_type(slash+1) == APK_SCRIPT_PRE_INSTALL)
			ri->has_install = 1;
664
	} else if (ri->version < 2) {
665 666
		/* Version 1.x packages do not contain installed size
		 * in metadata, so we calculate it here */
667
		pkg->installed_size += apk_calc_installed_size(ae->size);
Timo Teräs's avatar
Timo Teräs committed
668
	}
669 670 671 672

	return 0;
}

673
struct apk_package *apk_pkg_read(struct apk_database *db, const char *file,
Timo Teräs's avatar
Timo Teräs committed
674
				 struct apk_sign_ctx *sctx)
675 676
{
	struct read_info_ctx ctx;
677
	struct apk_file_info fi;
678
	struct apk_bstream *bs;
679
	struct apk_istream *tar;
680
	char realfile[PATH_MAX];
681
	int r;
682 683 684

	if (realpath(file, realfile) < 0)
		return NULL;
685 686
	if (apk_file_get_info(realfile, APK_CHECKSUM_NONE, &fi) < 0)
		return NULL;
687

688
	memset(&ctx, 0, sizeof(ctx));
Timo Teräs's avatar
Timo Teräs committed
689
	ctx.sctx = sctx;
690
	ctx.pkg = apk_pkg_new();
691 692 693
	if (ctx.pkg == NULL)
		return NULL;

694
	bs = apk_bstream_from_file(realfile);
Timo Teräs's avatar
Timo Teräs committed
695
	if (bs == NULL)
696 697 698 699
		goto err;

	ctx.db = db;
	ctx.has_install = 0;
700
	ctx.pkg->size = fi.size;
701

Timo Teräs's avatar
Timo Teräs committed
702
	tar = apk_bstream_gunzip_mpart(bs, apk_sign_ctx_mpart_cb, sctx);
703 704
	r = apk_tar_parse(tar, read_info_entry, &ctx);
	tar->close(tar);
705
	if (r < 0 && r != -1000)
706
		goto err;
Timo Teräs's avatar
Timo Teräs committed
707
	if (ctx.pkg->name == NULL)
708
		goto err;
Timo Teräs's avatar
Timo Teräs committed
709 710
	if (sctx->action == APK_SIGN_VERIFY && !sctx->data_verified &&
	    !(apk_flags & APK_FORCE))
711
		goto err;
Timo Teräs's avatar
Timo Teräs committed
712 713
	if (sctx->action != APK_SIGN_VERIFY)
		ctx.pkg->csum = sctx->identity;
714 715 716 717

	/* Add implicit busybox dependency if there is scripts */
	if (ctx.has_install) {
		struct apk_dependency dep = {
718
			.name = apk_db_get_name(db, APK_BLOB_STR("busybox")),
719 720 721
		};
		apk_deps_add(&ctx.pkg->depends, &dep);
	}
722
	ctx.pkg->filename = strdup(realfile);
723

724
	return apk_db_pkg_add(db, ctx.pkg);
725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740
err:
	apk_pkg_free(ctx.pkg);
	return NULL;
}

void apk_pkg_free(struct apk_package *pkg)
{
	struct apk_script *script;
	struct hlist_node *c, *n;

	if (pkg == NULL)
		return;

	hlist_for_each_entry_safe(script, c, n, &pkg->scripts, script_list)
		free(script);

741 742
	if (pkg->depends)
		free(pkg->depends);
743 744 745 746 747 748 749 750 751 752 753 754 755
	if (pkg->version)
		free(pkg->version);
	if (pkg->url)
		free(pkg->url);
	if (pkg->description)
		free(pkg->description);
	if (pkg->license)
		free(pkg->license);
	free(pkg);
}

int apk_pkg_get_state(struct apk_package *pkg)
{
756
	if (list_hashed(&pkg->installed_pkgs_list))
757 758
		return APK_PKG_INSTALLED;
	return APK_PKG_NOT_INSTALLED;
759 760
}

761 762 763
void apk_pkg_set_state(struct apk_database *db, struct apk_package *pkg, int state)
{
	switch (state) {
764
	case APK_PKG_INSTALLED:
765 766 767 768 769 770
		if (!list_hashed(&pkg->installed_pkgs_list)) {
			db->installed.stats.packages++;
			list_add_tail(&pkg->installed_pkgs_list,
				      &db->installed.packages);
		}
		break;
771
	case APK_PKG_NOT_INSTALLED:
772 773 774 775 776 777 778 779
		if (list_hashed(&pkg->installed_pkgs_list)) {
			db->installed.stats.packages--;
			list_del(&pkg->installed_pkgs_list);
		}
		break;
	}
}

780
int apk_pkg_add_script(struct apk_package *pkg, struct apk_istream *is,
781 782 783 784 785 786 787 788
		       unsigned int type, unsigned int size)
{
	struct apk_script *script;
	int r;

	script = malloc(sizeof(struct apk_script) + size);
	script->type = type;
	script->size = size;
789
	r = is->read(is, script->script, size);
790 791 792 793 794 795 796 797 798
	if (r < 0) {
		free(script);
		return r;
	}

	hlist_add_head(&script->script_list, &pkg->scripts);
	return r;
}

799
int apk_pkg_run_script(struct apk_package *pkg, int root_fd,
800 801
		       unsigned int type)
{
802 803 804 805
	static const char * const environment[] = {
		"PATH=/usr/sbin:/usr/bin:/sbin:/bin",
		NULL
	};
806 807 808 809 810 811
	struct apk_script *script;
	struct hlist_node *c;
	int fd, status;
	pid_t pid;
	char fn[1024];

812
	fchdir(root_fd);
813
	hlist_for_each_entry(script, c, &pkg->scripts, script_list) {
814
		if (script->type != type)
815 816 817 818 819
			continue;

		snprintf(fn, sizeof(fn),
			"tmp/%s-%s.%s",
			pkg->name->name, pkg->version,
Timo Teräs's avatar
Timo Teräs committed
820
			apk_script_types[type]);
821 822 823 824 825 826 827 828 829 830 831 832
		fd = creat(fn, 0777);
		if (fd < 0)
			return fd;
		write(fd, script->script, script->size);
		close(fd);

		apk_message("Executing %s", &fn[4]);

		pid = fork();
		if (pid == -1)
			return -1;
		if (pid == 0) {
833 834
			if (chroot(".") < 0) {
				apk_error("chroot: %s", strerror(errno));
Timo Teräs's avatar
Timo Teräs committed
835
			} else {
Timo Teräs's avatar
Timo Teräs committed
836
				execle(fn, apk_script_types[type],
837
				       pkg->version, "", NULL, environment);
Timo Teräs's avatar
Timo Teräs committed
838
			}
839 840 841
			exit(1);
		}
		waitpid(pid, &status, 0);
Timo Teräs's avatar
Timo Teräs committed
842
		unlink(fn);
843 844 845 846 847 848 849 850
		if (WIFEXITED(status))
			return WEXITSTATUS(status);
		return -1;
	}

	return 0;
}

Timo Teräs's avatar
Timo Teräs committed
851
static int parse_index_line(void *ctx, apk_blob_t line)
852
{
Timo Teräs's avatar
Timo Teräs committed
853
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
854

Timo Teräs's avatar
Timo Teräs committed
855 856
	if (line.len < 3 || line.ptr[1] != ':')
		return 0;
857

858
	apk_pkg_add_info(ri->db, ri->pkg, line.ptr[0], APK_BLOB_PTR_LEN(line.ptr+2, line.len-2));
859 860 861 862 863
	return 0;
}

struct apk_package *apk_pkg_parse_index_entry(struct apk_database *db, apk_blob_t blob)
{
Timo Teräs's avatar
Timo Teräs committed
864
	struct read_info_ctx ctx;
865

866
	ctx.pkg = apk_pkg_new();
Timo Teräs's avatar
Timo Teräs committed
867
	if (ctx.pkg == NULL)
868 869
		return NULL;

Timo Teräs's avatar
Timo Teräs committed
870
	ctx.db = db;
871
	ctx.version = 0;
Timo Teräs's avatar
Timo Teräs committed
872
	ctx.has_install = 0;
873

Timo Teräs's avatar
Timo Teräs committed
874 875 876 877
	apk_blob_for_each_segment(blob, "\n", parse_index_line, &ctx);

	if (ctx.pkg->name == NULL) {
		apk_pkg_free(ctx.pkg);
878 879
		apk_error("Failed to parse index entry: %.*s",
			  blob.len, blob.ptr);
Timo Teräs's avatar
Timo Teräs committed
880
		ctx.pkg = NULL;
881 882
	}

Timo Teräs's avatar
Timo Teräs committed
883
	return ctx.pkg;
884 885
}

886 887
int apk_pkg_write_index_entry(struct apk_package *info,
			      struct apk_ostream *os)
888
{
889
	char buf[512];
890 891 892 893
	apk_blob_t bbuf = APK_BLOB_BUF(buf);
	int r;

	apk_blob_push_blob(&bbuf, APK_BLOB_STR("C:"));
Timo Teräs's avatar
Timo Teräs committed
894
	apk_blob_push_csum(&bbuf, &info->csum);
895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nP:"));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR(info->name->name));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nV:"));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR(info->version));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nS:"));
	apk_blob_push_uint(&bbuf, info->size, 10);
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nI:"));
	apk_blob_push_uint(&bbuf, info->installed_size, 10);
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nT:"));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR(info->description));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nU:"));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR(info->url));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nL:"));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR(info->license));
	apk_blob_push_blob(&bbuf, APK_BLOB_STR("\n"));

Timo Teräs's avatar
Timo Teräs committed
911 912 913
	if (APK_BLOB_IS_NULL(bbuf))
		return -1;

914
	if (os->write(os, buf, bbuf.ptr - buf) != bbuf.ptr - buf)
915
		return -1;
916 917

	if (info->depends != NULL) {
918 919 920 921 922 923 924
		if (os->write(os, "D:", 2) != 2)
			return -1;
		r = apk_deps_write(info->depends, os);
		if (r < 0)
			return r;
		if (os->write(os, "\n", 1) != 1)
			return -1;
925 926
	}

927
	return 0;
928
}
929

930 931 932 933 934
int apk_pkg_version_compare(struct apk_package *a, struct apk_package *b)
{
	return apk_version_compare(a->version, b->version);
}

935 936 937 938 939 940 941 942 943 944 945 946 947
struct apk_dependency apk_dep_from_str(struct apk_database *db,
				       char *str)
{
	apk_blob_t name = APK_BLOB_STR(str);
	char *v = str;
	int mask = APK_DEPMASK_REQUIRE;

	v = strpbrk(str, "<>=");
	if (v != NULL) {
		name.len = v - str;
		mask = apk_version_result_mask(v++);
		if (*v == '=')
			v++;
948
	}
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
	return (struct apk_dependency) {
		.name = apk_db_get_name(db, name),
		.version = v,
		.result_mask = mask,
	};
}

struct apk_dependency apk_dep_from_pkg(struct apk_database *db,
				       struct apk_package *pkg)
{
	return (struct apk_dependency) {
		.name = apk_db_get_name(db, APK_BLOB_STR(pkg->name->name)),
		.version = pkg->version,
		.result_mask = APK_VERSION_EQUAL,
	};
}