package.c 23 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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
void apk_pkg_format_plain(struct apk_package *pkg, apk_blob_t to)
{
	/* pkgname-1.0.apk */
	apk_blob_push_blob(&to, APK_BLOB_STR(pkg->name->name));
	apk_blob_push_blob(&to, APK_BLOB_STR("-"));
	apk_blob_push_blob(&to, APK_BLOB_STR(pkg->version));
	apk_blob_push_blob(&to, APK_BLOB_STR(".apk"));
	apk_blob_push_blob(&to, APK_BLOB_PTR_LEN("", 1));
}

void apk_pkg_format_cache(struct apk_package *pkg, apk_blob_t to)
{
	/* pkgname-1.0_alpha1.12345678.apk */
	apk_blob_push_blob(&to, APK_BLOB_STR(pkg->name->name));
	apk_blob_push_blob(&to, APK_BLOB_STR("-"));
	apk_blob_push_blob(&to, APK_BLOB_STR(pkg->version));
	apk_blob_push_blob(&to, APK_BLOB_STR("."));
	apk_blob_push_hexdump(&to, APK_BLOB_PTR_LEN((char *) pkg->csum.data,
						    APK_CACHE_CSUM_BYTES));
	apk_blob_push_blob(&to, APK_BLOB_STR(".apk"));
	apk_blob_push_blob(&to, APK_BLOB_PTR_LEN("", 1));
}

54
struct apk_package *apk_pkg_new(void)
55
{
56 57
	return calloc(1, sizeof(struct apk_package));
}
58

59 60 61 62 63 64 65 66 67 68
struct apk_installed_package *apk_pkg_install(struct apk_database *db,
					      struct apk_package *pkg)
{
	struct apk_installed_package *ipkg;

	if (pkg->ipkg != NULL)
		return pkg->ipkg;

	pkg->ipkg = ipkg = calloc(1, sizeof(struct apk_installed_package));
	ipkg->pkg = pkg;
Timo Teräs's avatar
Timo Teräs committed
69 70 71 72 73 74 75

	/* Overlay override information resides in a nameless package */
	if (pkg->name != NULL) {
		db->installed.stats.packages++;
		list_add_tail(&ipkg->installed_pkgs_list,
			      &db->installed.packages);
	}
76 77 78 79 80 81 82 83 84 85 86 87 88 89

	return ipkg;
}

void apk_pkg_uninstall(struct apk_database *db, struct apk_package *pkg)
{
	struct apk_installed_package *ipkg = pkg->ipkg;
	int i;

	if (ipkg == NULL)
		return;

	if (db != NULL)
		db->installed.stats.packages--;
90

91 92 93 94 95 96 97 98 99 100 101 102 103 104
	list_del(&ipkg->installed_pkgs_list);

	if (ipkg->triggers) {
		list_del(&ipkg->trigger_pkgs_list);
		for (i = 0; i < ipkg->triggers->num; i++)
			free(ipkg->triggers->item[i]);
		free(ipkg->triggers);
	}

	for (i = 0; i < APK_SCRIPT_MAX; i++)
		if (ipkg->script[i].ptr != NULL)
			free(ipkg->script[i].ptr);
	free(ipkg);
	pkg->ipkg = NULL;
105 106
}

107 108 109 110 111 112
int apk_pkg_parse_name(apk_blob_t apkname,
		       apk_blob_t *name,
		       apk_blob_t *version)
{
	int i, dash = 0;

113 114 115
	if (APK_BLOB_IS_NULL(apkname))
		return -1;

116 117 118 119 120 121 122 123
	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;
	}
124 125 126
	if (i < 0)
		return -1;

127 128 129 130 131 132 133 134 135
	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
136
static apk_blob_t trim(apk_blob_t str)
137 138
{
	if (str.ptr == NULL || str.len < 1)
Timo Teräs's avatar
Timo Teräs committed
139
		return str;
140

141 142
	if (str.ptr[str.len-1] == '\n') {
		str.ptr[str.len-1] = 0;
Timo Teräs's avatar
Timo Teräs committed
143
		return APK_BLOB_PTR_LEN(str.ptr, str.len-1);
144
	}
145

Timo Teräs's avatar
Timo Teräs committed
146
	return str;
147 148 149 150 151 152 153 154 155 156
}

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++) {
Timo Teräs's avatar
Timo Teräs committed
157 158
			if (deps->item[i].name == dep->name) {
				deps->item[i] = *dep;
159
				return 0;
Timo Teräs's avatar
Timo Teräs committed
160
			}
161 162 163 164 165 166
		}
	}

	*apk_dependency_array_add(depends) = *dep;
	return 0;
}
Timo Teräs's avatar
Timo Teräs committed
167

168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186
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;
	}
}

187 188 189 190 191
struct parse_depend_ctx {
	struct apk_database *db;
	struct apk_dependency_array **depends;
};

Timo Teräs's avatar
Timo Teräs committed
192 193
int apk_dep_from_blob(struct apk_dependency *dep, struct apk_database *db,
		      apk_blob_t blob)
194 195
{
	struct apk_name *name;
196 197
	apk_blob_t bname, bop, bver = APK_BLOB_NULL;
	int mask = APK_VERSION_LESS | APK_VERSION_EQUAL | APK_VERSION_GREATER;
198

199 200 201 202 203 204 205 206 207 208
	/* [!]name[<,<=,=,>=,>]ver */
	if (blob.ptr[0] == '!') {
		mask = 0;
		blob.ptr++;
		blob.len--;
	}
	if (apk_blob_cspn(blob, "<>=", &bname, &bop)) {
		int i;

		if (mask == 0)
Timo Teräs's avatar
Timo Teräs committed
209
			return -EINVAL;
210
		if (!apk_blob_spn(bop, "<>=", &bop, &bver))
Timo Teräs's avatar
Timo Teräs committed
211 212 213 214
			return -EINVAL;
		mask = 0;
		for (i = 0; i < bop.len; i++) {
			switch (bop.ptr[i]) {
215 216 217 218 219 220 221 222 223 224 225 226 227
			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))
Timo Teräs's avatar
Timo Teräs committed
228
			return -EINVAL;
229 230

		if (!apk_version_validate(bver))
Timo Teräs's avatar
Timo Teräs committed
231 232 233
			return -EINVAL;

		blob = bname;
234 235
	}

Timo Teräs's avatar
Timo Teräs committed
236
	name = apk_db_get_name(db, blob);
237
	if (name == NULL)
Timo Teräs's avatar
Timo Teräs committed
238
		return -ENOENT;
239 240 241

	*dep = (struct apk_dependency){
		.name = name,
242 243
		.version = APK_BLOB_IS_NULL(bver) ? NULL : apk_blob_cstr(bver),
		.result_mask = mask,
244
	};
Timo Teräs's avatar
Timo Teräs committed
245 246 247 248 249 250 251
	return 0;
}

void apk_dep_from_pkg(struct apk_dependency *dep, struct apk_database *db,
		      struct apk_package *pkg)
{
	*dep = (struct apk_dependency) {
252
		.name = pkg->name,
Timo Teräs's avatar
Timo Teräs committed
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272
		.version = pkg->version,
		.result_mask = APK_VERSION_EQUAL,
	};
}

static int parse_depend(void *ctx, apk_blob_t blob)
{
	struct parse_depend_ctx *pctx = (struct parse_depend_ctx *) ctx;
	struct apk_dependency *dep, p;

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

	if (apk_dep_from_blob(&p, pctx->db, blob) < 0)
		return -1;

	dep = apk_dependency_array_add(pctx->depends);
	if (dep == NULL)
		return -1;
	*dep = p;
273 274 275 276

	return 0;
}

277 278 279 280
void apk_deps_parse(struct apk_database *db,
		    struct apk_dependency_array **depends,
		    apk_blob_t blob)
{
281
	struct parse_depend_ctx ctx = { db, depends };
282

283
	if (blob.len > 0 && blob.ptr[blob.len-1] == '\n')
284
		blob.len--;
285

286
	apk_blob_for_each_segment(blob, " ", parse_depend, &ctx);
287 288
}

289 290 291 292 293 294 295 296 297 298 299 300 301 302
void apk_blob_push_dep(apk_blob_t *to, struct apk_dependency *dep)
{
	if (dep->result_mask == APK_DEPMASK_CONFLICT)
		apk_blob_push_blob(to, APK_BLOB_PTR_LEN("!", 1));

	apk_blob_push_blob(to, APK_BLOB_STR(dep->name->name));

	if (dep->result_mask != APK_DEPMASK_CONFLICT &&
	    dep->result_mask != APK_DEPMASK_REQUIRE) {
		apk_blob_push_blob(to, APK_BLOB_STR(apk_version_op_string(dep->result_mask)));
		apk_blob_push_blob(to, APK_BLOB_STR(dep->version));
	}
}

303 304
int apk_deps_write(struct apk_dependency_array *deps, struct apk_ostream *os)
{
305 306 307
	apk_blob_t blob;
	char tmp[256];
	int i, n = 0;
308 309 310 311 312

	if (deps == NULL)
		return 0;

	for (i = 0; i < deps->num; i++) {
313 314 315 316 317 318 319 320 321
		blob = APK_BLOB_BUF(tmp);
		if (i)
			apk_blob_push_blob(&blob, APK_BLOB_PTR_LEN(" ", 1));
		apk_blob_push_dep(&blob, &deps->item[i]);

		blob = apk_blob_pushed(APK_BLOB_BUF(tmp), blob);
		if (APK_BLOB_IS_NULL(blob) || 
		    os->write(os, blob.ptr, blob.len) != blob.len)
			return -1;
322

323
		n += blob.len;
324 325 326 327 328
	}

	return n;
}

Timo Teräs's avatar
Timo Teräs committed
329
const char *apk_script_types[] = {
330 331 332 333 334 335
	[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",
336
	[APK_SCRIPT_TRIGGER]		= "trigger",
337 338 339 340 341 342
};

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

Timo Teräs's avatar
Timo Teräs committed
343 344 345
	for (i = 0; i < ARRAY_SIZE(apk_script_types); i++)
		if (apk_script_types[i] &&
		    strcmp(apk_script_types[i], name) == 0)
346 347
			return i;

348
	return APK_SCRIPT_INVALID;
349 350
}

351
void apk_sign_ctx_init(struct apk_sign_ctx *ctx, int action,
352
		       struct apk_checksum *identity, int keys_fd)
Timo Teräs's avatar
Timo Teräs committed
353 354
{
	memset(ctx, 0, sizeof(struct apk_sign_ctx));
355
	ctx->keys_fd = keys_fd;
Timo Teräs's avatar
Timo Teräs committed
356 357
	ctx->action = action;
	switch (action) {
Timo Teräs's avatar
Timo Teräs committed
358 359 360
	case APK_SIGN_VERIFY:
		ctx->md = EVP_md_null();
		break;
361 362 363 364 365 366 367 368 369 370
	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
371 372
	case APK_SIGN_GENERATE_V1:
		ctx->md = EVP_md5();
Timo Teräs's avatar
Timo Teräs committed
373 374
		ctx->control_started = 1;
		ctx->data_started = 1;
Timo Teräs's avatar
Timo Teräs committed
375 376
		break;
	case APK_SIGN_GENERATE:
377
	case APK_SIGN_VERIFY_AND_GENERATE:
Timo Teräs's avatar
Timo Teräs committed
378 379
		ctx->md = EVP_sha1();
		break;
380 381 382 383 384 385
	default:
		action = APK_SIGN_NONE;
		ctx->md = EVP_md_null();
		ctx->control_started = 1;
		ctx->data_started = 1;
		break;
Timo Teräs's avatar
Timo Teräs committed
386
	}
387 388
	EVP_MD_CTX_init(&ctx->mdctx);
	EVP_DigestInit_ex(&ctx->mdctx, ctx->md, NULL);
389
	EVP_MD_CTX_set_flags(&ctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
Timo Teräs's avatar
Timo Teräs committed
390 391 392 393 394 395 396 397
}

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);
398
	EVP_MD_CTX_cleanup(&ctx->mdctx);
Timo Teräs's avatar
Timo Teräs committed
399 400 401 402 403 404 405 406 407
}

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;

408
	if (fi->name[0] != '.' || strchr(fi->name, '/') != NULL) {
Timo Teräs's avatar
Timo Teräs committed
409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425
		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 */
426 427
	if ((ctx->action != APK_SIGN_VERIFY &&
	     ctx->action != APK_SIGN_VERIFY_AND_GENERATE) ||
428
	    ctx->signature.pkey != NULL)
Timo Teräs's avatar
Timo Teräs committed
429 430
		return 0;

431 432 433
	if (ctx->keys_fd < 0)
		return 0;

Timo Teräs's avatar
Timo Teräs committed
434 435
	if (strncmp(&fi->name[6], "RSA.", 4) == 0 ||
	    strncmp(&fi->name[6], "DSA.", 4) == 0) {
436 437 438 439 440 441
		int fd = openat(ctx->keys_fd, &fi->name[10], O_RDONLY);
	        BIO *bio;

		if (fd < 0)
			return 0;

442
		bio = BIO_new_fp(fdopen(fd, "r"), BIO_CLOSE);
443
		ctx->signature.pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL);
Timo Teräs's avatar
Timo Teräs committed
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
		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;
}

460
int apk_sign_ctx_parse_pkginfo_line(void *ctx, apk_blob_t line)
461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492
{
	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);
493 494 495
		apk_blob_for_each_segment(
			blob, "\n",
			apk_sign_ctx_parse_pkginfo_line, ctx);
496 497 498 499 500 501
		free(blob.ptr);
	}

	return 0;
}

502
int apk_sign_ctx_mpart_cb(void *ctx, int part, apk_blob_t data)
Timo Teräs's avatar
Timo Teräs committed
503 504 505
{
	struct apk_sign_ctx *sctx = (struct apk_sign_ctx *) ctx;
	unsigned char calculated[EVP_MAX_MD_SIZE];
Timo Teräs's avatar
Timo Teräs committed
506 507 508 509 510 511 512
	int r, end_of_control;

	if ((part == APK_MPART_DATA) ||
	    (part == APK_MPART_BOUNDARY && sctx->data_started))
		goto update_digest;

	/* Still in signature blocks? */
513 514 515
	if (!sctx->control_started) {
		if (part == APK_MPART_END)
			return -EKEYREJECTED;
Timo Teräs's avatar
Timo Teräs committed
516
		goto reset_digest;
517
	}
Timo Teräs's avatar
Timo Teräs committed
518 519 520 521 522 523

	/* Grab state and mark all remaining block as data */
	end_of_control = (sctx->data_started == 0);
	sctx->data_started = 1;

	/* End of control-block and control does not have data checksum? */
524 525
	if (sctx->has_data_checksum == 0 && end_of_control &&
	    part != APK_MPART_END)
Timo Teräs's avatar
Timo Teräs committed
526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546
		goto update_digest;

	/* Drool in the remaining of the digest block now, we will finish
	 * it on all cases */
	EVP_DigestUpdate(&sctx->mdctx, data.ptr, data.len);

	/* End of control-block and checking control hash/signature or
	 * end of data-block and checking its hash/signature */
	if (sctx->has_data_checksum && !end_of_control) {
		/* End of control-block and check it's hash */
		EVP_DigestFinal_ex(&sctx->mdctx, calculated, NULL);
		if (EVP_MD_CTX_size(&sctx->mdctx) == 0 ||
		    memcmp(calculated, sctx->data_checksum,
		           EVP_MD_CTX_size(&sctx->mdctx)) != 0)
			return -EKEYREJECTED;
		sctx->data_verified = 1;
		if (!(apk_flags & APK_ALLOW_UNTRUSTED) &&
		    !sctx->control_verified)
			return -ENOKEY;
		return 0;
	}
Timo Teräs's avatar
Timo Teräs committed
547

Timo Teräs's avatar
Timo Teräs committed
548 549
	switch (sctx->action) {
	case APK_SIGN_VERIFY:
550
	case APK_SIGN_VERIFY_AND_GENERATE:
Timo Teräs's avatar
Timo Teräs committed
551 552 553 554
		if (sctx->signature.pkey == NULL) {
			if (apk_flags & APK_ALLOW_UNTRUSTED)
				break;
			return -ENOKEY;
Timo Teräs's avatar
Timo Teräs committed
555 556
		}

Timo Teräs's avatar
Timo Teräs committed
557 558 559 560 561 562 563 564
		r = EVP_VerifyFinal(&sctx->mdctx,
			(unsigned char *) sctx->signature.data.ptr,
			sctx->signature.data.len,
			sctx->signature.pkey);
		if (r != 1)
			return -EKEYREJECTED;
		sctx->control_verified = 1;
		if (!sctx->has_data_checksum && part == APK_MPART_END)
565
			sctx->data_verified = 1;
Timo Teräs's avatar
Timo Teräs committed
566 567 568 569 570 571 572 573 574
		break;
	case APK_SIGN_VERIFY_IDENTITY:
		/* Reset digest for hashing data */
		EVP_DigestFinal_ex(&sctx->mdctx, calculated, NULL);
		if (memcmp(calculated, sctx->identity.data,
			   sctx->identity.type) != 0)
			return -EKEYREJECTED;
		sctx->control_verified = 1;
		if (!sctx->has_data_checksum && part == APK_MPART_END)
575
			sctx->data_verified = 1;
Timo Teräs's avatar
Timo Teräs committed
576 577 578 579 580 581 582 583 584
		break;
	case APK_SIGN_GENERATE:
	case APK_SIGN_GENERATE_V1:
		/* Package identity is the checksum */
		sctx->identity.type = EVP_MD_CTX_size(&sctx->mdctx);
		EVP_DigestFinal_ex(&sctx->mdctx, sctx->identity.data, NULL);
		if (sctx->action == APK_SIGN_GENERATE &&
		    sctx->has_data_checksum)
			return -ECANCELED;
585
		break;
Timo Teräs's avatar
Timo Teräs committed
586
	}
587 588 589 590
	if (sctx->action == APK_SIGN_VERIFY_AND_GENERATE) {
		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
591 592 593 594 595 596 597 598
reset_digest:
	EVP_DigestInit_ex(&sctx->mdctx, sctx->md, NULL);
	EVP_MD_CTX_set_flags(&sctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
	return 0;

update_digest:
	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
599 600 601
	return 0;
}

602 603 604
struct read_info_ctx {
	struct apk_database *db;
	struct apk_package *pkg;
Timo Teräs's avatar
Timo Teräs committed
605 606
	struct apk_sign_ctx *sctx;
	int version;
607 608
};

609 610
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
611 612 613
{
	switch (field) {
	case 'P':
614
		pkg->name = apk_db_get_name(db, value);
Timo Teräs's avatar
Timo Teräs committed
615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631
		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
632
		apk_blob_pull_csum(&value, &pkg->csum);
Timo Teräs's avatar
Timo Teräs committed
633 634
		break;
	case 'S':
635
		pkg->size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
636 637
		break;
	case 'I':
638
		pkg->installed_size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
639
		break;
640 641
	default:
		return -1;
Timo Teräs's avatar
Timo Teräs committed
642
	}
643 644
	if (APK_BLOB_IS_NULL(value))
		return -1;
Timo Teräs's avatar
Timo Teräs committed
645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668
	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;

669
	if (!apk_blob_split(line, APK_BLOB_STR(" = "), &l, &r))
Timo Teräs's avatar
Timo Teräs committed
670 671 672
		return 0;

	for (i = 0; i < ARRAY_SIZE(fields); i++) {
673
		if (apk_blob_compare(APK_BLOB_STR(fields[i].str), l) == 0) {
674
			apk_pkg_add_info(ri->db, ri->pkg, fields[i].field, r);
675
			return 0;
Timo Teräs's avatar
Timo Teräs committed
676 677
		}
	}
678
	apk_sign_ctx_parse_pkginfo_line(ri->sctx, line);
679

Timo Teräs's avatar
Timo Teräs committed
680 681 682
	return 0;
}

683
static int read_info_entry(void *ctx, const struct apk_file_info *ae,
684
			   struct apk_istream *is)
685
{
Timo Teräs's avatar
Timo Teräs committed
686 687 688 689 690
	static struct {
		const char *str;
		char field;
	} fields[] = {
		{ "DESC",	'T' },
691
		{ "WWW",	'U' },
Timo Teräs's avatar
Timo Teräs committed
692 693 694
		{ "LICENSE",	'L' },
		{ "DEPEND", 	'D' },
	};
695 696 697 698
	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;
699
	char *slash;
Timo Teräs's avatar
Timo Teräs committed
700
	int i;
701

Timo Teräs's avatar
Timo Teräs committed
702
	/* Meta info and scripts */
Timo Teräs's avatar
Timo Teräs committed
703 704
	if (apk_sign_ctx_process_file(ri->sctx, ae, is) == 0)
		return 0;
705

Timo Teräs's avatar
Timo Teräs committed
706
	if (ae->name[0] == '.') {
Timo Teräs's avatar
Timo Teräs committed
707 708
		/* APK 2.0 format */
		if (strcmp(ae->name, ".PKGINFO") == 0) {
709
			apk_blob_t blob = apk_blob_from_istream(is, ae->size);
Timo Teräs's avatar
Timo Teräs committed
710 711
			apk_blob_for_each_segment(blob, "\n", read_info_line, ctx);
			free(blob.ptr);
712 713
			ri->version = 2;
		} else if (strcmp(ae->name, ".INSTALL") == 0) {
714 715
			apk_warning("Package '%s-%s' contains deprecated .INSTALL",
				    pkg->name->name, pkg->version);
Timo Teräs's avatar
Timo Teräs committed
716
		}
717 718 719 720
		return 0;
	}

	if (strncmp(ae->name, "var/db/apk/", 11) == 0) {
Timo Teräs's avatar
Timo Teräs committed
721
		/* APK 1.0 format */
722
		ri->version = 1;
Timo Teräs's avatar
Timo Teräs committed
723 724
		if (!S_ISREG(ae->mode))
			return 0;
725

Timo Teräs's avatar
Timo Teräs committed
726 727 728
		slash = strchr(&ae->name[11], '/');
		if (slash == NULL)
			return 0;
729

Timo Teräs's avatar
Timo Teräs committed
730 731 732
		if (apk_pkg_parse_name(APK_BLOB_PTR_PTR(&ae->name[11], slash-1),
				       &name, &version) < 0)
			return -1;
733

734 735
		if (pkg->name == NULL)
			pkg->name = apk_db_get_name(db, name);
Timo Teräs's avatar
Timo Teräs committed
736 737 738 739 740
		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) {
741
				apk_blob_t blob = apk_blob_from_istream(is, ae->size);
742 743
				apk_pkg_add_info(ri->db, ri->pkg, fields[i].field,
						 trim(blob));
Timo Teräs's avatar
Timo Teräs committed
744 745 746
				free(blob.ptr);
				break;
			}
747
		}
748
	} else if (ri->version < 2) {
749 750
		/* Version 1.x packages do not contain installed size
		 * in metadata, so we calculate it here */
751
		pkg->installed_size += apk_calc_installed_size(ae->size);
Timo Teräs's avatar
Timo Teräs committed
752
	}
753 754 755 756

	return 0;
}

757 758
int apk_pkg_read(struct apk_database *db, const char *file,
	         struct apk_sign_ctx *sctx, struct apk_package **pkg)
759 760
{
	struct read_info_ctx ctx;
761
	struct apk_file_info fi;
762
	struct apk_bstream *bs;
763
	struct apk_istream *tar;
764
	int r;
765

766
	r = apk_file_get_info(AT_FDCWD, file, APK_CHECKSUM_NONE, &fi);
767 768
	if (r != 0)
		return r;
769

770
	memset(&ctx, 0, sizeof(ctx));
Timo Teräs's avatar
Timo Teräs committed
771
	ctx.sctx = sctx;
772
	ctx.pkg = apk_pkg_new();
773
	r = -ENOMEM;
774
	if (ctx.pkg == NULL)
775
		goto err;
776
	bs = apk_bstream_from_file(AT_FDCWD, file);
Timo Teräs's avatar
Timo Teräs committed
777
	if (bs == NULL)
778 779 780
		goto err;

	ctx.db = db;
781
	ctx.pkg->size = fi.size;
782

Timo Teräs's avatar
Timo Teräs committed
783
	tar = apk_bstream_gunzip_mpart(bs, apk_sign_ctx_mpart_cb, sctx);
784
	r = apk_tar_parse(tar, read_info_entry, &ctx, FALSE);
785
	tar->close(tar);
Timo Teräs's avatar
Timo Teräs committed
786
	if (r < 0 && r != -ECANCELED)
787
		goto err;
788
	if (ctx.pkg->name == NULL) {
789
		r = -ENOMSG;
790
		goto err;
791
	}
Timo Teräs's avatar
Timo Teräs committed
792 793
	if (sctx->action != APK_SIGN_VERIFY)
		ctx.pkg->csum = sctx->identity;
794
	ctx.pkg->filename = strdup(file);
795

796 797 798
	ctx.pkg = apk_db_pkg_add(db, ctx.pkg);
	if (pkg != NULL)
		*pkg = ctx.pkg;
799
	return 0;
800 801
err:
	apk_pkg_free(ctx.pkg);
802
	return r;
803 804 805 806 807 808 809
}

void apk_pkg_free(struct apk_package *pkg)
{
	if (pkg == NULL)
		return;

810
	apk_pkg_uninstall(NULL, pkg);
811 812
	if (pkg->depends)
		free(pkg->depends);
813 814 815 816 817 818 819 820 821 822 823
	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);
}

824 825 826
int apk_ipkg_add_script(struct apk_installed_package *ipkg,
			struct apk_istream *is,
			unsigned int type, unsigned int size)
827
{
828
	void *ptr;
829 830
	int r;

831 832 833 834 835
	if (type >= APK_SCRIPT_MAX)
		return -1;

	ptr = malloc(size);
	r = is->read(is, ptr, size);
836
	if (r < 0) {
837
		free(ptr);
838 839 840
		return r;
	}

841 842 843 844 845
	if (ipkg->script[type].ptr)
		free(ipkg->script[type].ptr);
	ipkg->script[type].ptr = ptr;
	ipkg->script[type].len = size;
	return 0;
846 847
}

848 849
int apk_ipkg_run_script(struct apk_installed_package *ipkg, int root_fd,
			unsigned int type, char **argv)
850
{
851
	static char * const environment[] = {
852 853 854
		"PATH=/usr/sbin:/usr/bin:/sbin:/bin",
		NULL
	};
855 856
	struct apk_package *pkg = ipkg->pkg;
	char fn[PATH_MAX];
857 858 859
	int fd, status;
	pid_t pid;

860 861
	if (type >= APK_SCRIPT_MAX)
		return -1;
862

863 864 865 866
	if (ipkg->script[type].ptr == NULL)
		return 0;

	argv[0] = (char *) apk_script_types[type];
867

868 869 870 871 872
	/* Avoid /tmp as it can be mounted noexec */
	snprintf(fn, sizeof(fn), "var/cache/misc/%s-%s.%s",
		pkg->name->name, pkg->version,
		apk_script_types[type]);

873 874 875 876
	apk_message("Executing %s", &fn[15]);
	if (apk_flags & APK_SIMULATE)
		return 0;

877 878 879
	fd = openat(root_fd, fn, O_CREAT|O_RDWR|O_TRUNC, 0755);
	if (fd < 0) {
		mkdirat(root_fd, "var/cache/misc", 0755);
880
		fd = openat(root_fd, fn, O_CREAT|O_RDWR|O_TRUNC, 0755);
881 882 883 884 885
		if (fd < 0)
			return -errno;
	}
	write(fd, ipkg->script[type].ptr, ipkg->script[type].len);
	close(fd);
886

887 888
	pid = fork();
	if (pid == -1)
889
		return -1;
890 891 892 893 894 895 896 897
	if (pid == 0) {
		fchdir(root_fd);
		if (chroot(".") < 0) {
			apk_error("chroot: %s", strerror(errno));
		} else {
			execve(fn, argv, environment);
		}
		exit(1);
898
	}
899 900 901 902 903
	waitpid(pid, &status, 0);
	unlinkat(root_fd, fn, 0);
	if (WIFEXITED(status))
		return WEXITSTATUS(status);
	return -1;
904 905
}

Timo Teräs's avatar
Timo Teräs committed
906
static int parse_index_line(void *ctx, apk_blob_t line)
907
{
Timo Teräs's avatar
Timo Teräs committed
908
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
909

Timo Teräs's avatar
Timo Teräs committed
910 911
	if (line.len < 3 || line.ptr[1] != ':')
		return 0;
912

913
	apk_pkg_add_info(ri->db, ri->pkg, line.ptr[0], APK_BLOB_PTR_LEN(line.ptr+2, line.len-2));
914 915 916 917 918
	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
919
	struct read_info_ctx ctx;
920

921
	ctx.pkg = apk_pkg_new();
Timo Teräs's avatar
Timo Teräs committed
922
	if (ctx.pkg == NULL)
923 924
		return NULL;

Timo Teräs's avatar
Timo Teräs committed
925
	ctx.db = db;
926
	ctx.version = 0;
927

Timo Teräs's avatar
Timo Teräs committed
928 929 930 931
	apk_blob_for_each_segment(blob, "\n", parse_index_line, &ctx);

	if (ctx.pkg->name == NULL) {
		apk_pkg_free(ctx.pkg);
932 933
		apk_error("Failed to parse index entry: %.*s",
			  blob.len, blob.ptr);
Timo Teräs's avatar
Timo Teräs committed
934
		ctx.pkg = NULL;
935 936
	}

Timo Teräs's avatar
Timo Teräs committed
937
	return ctx.pkg;
938 939
}

940 941
int apk_pkg_write_index_entry(struct apk_package *info,
			      struct apk_ostream *os)
942
{
943
	char buf[512];
944 945 946 947
	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
948
	apk_blob_push_csum(&bbuf, &info->csum);
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
	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
965 966 967
	if (APK_BLOB_IS_NULL(bbuf))
		return -1;

968 969
	bbuf = apk_blob_pushed(APK_BLOB_BUF(buf), bbuf);
	if (os->write(os, bbuf.ptr, bbuf.len) != bbuf.len)
970
		return -1;
971 972

	if (info->depends != NULL) {
973 974 975 976 977 978 979
		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;
980 981
	}

982
	return 0;
983
}
984

985 986 987 988
int apk_pkg_version_compare(struct apk_package *a, struct apk_package *b)
{
	return apk_version_compare(a->version, b->version);
}