package.c 20.5 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
}

Timo Teräs's avatar
Timo Teräs committed
259 260 261
void apk_sign_ctx_init(struct apk_sign_ctx *ctx, int action)
{
	memset(ctx, 0, sizeof(struct apk_sign_ctx));
Timo Teräs's avatar
Timo Teräs committed
262 263
	ctx->action = action;
	switch (action) {
Timo Teräs's avatar
Timo Teräs committed
264 265 266 267 268
	case APK_SIGN_VERIFY:
		ctx->md = EVP_md_null();
		break;
	case APK_SIGN_GENERATE_V1:
		ctx->md = EVP_md5();
Timo Teräs's avatar
Timo Teräs committed
269 270
		ctx->control_started = 1;
		ctx->data_started = 1;
Timo Teräs's avatar
Timo Teräs committed
271 272 273 274 275 276 277
		break;
	case APK_SIGN_GENERATE:
	default:
		action = APK_SIGN_GENERATE;
		ctx->md = EVP_sha1();
		break;
	}
278 279 280
	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
281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298
}


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;

299
	if (fi->name[0] != '.' || strchr(fi->name, '/') != NULL) {
Timo Teräs's avatar
Timo Teräs committed
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343
		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;
}

344
int apk_sign_ctx_mpart_cb(void *ctx, int part, apk_blob_t data)
Timo Teräs's avatar
Timo Teräs committed
345 346 347 348 349 350
{
	struct apk_sign_ctx *sctx = (struct apk_sign_ctx *) ctx;
	unsigned char calculated[EVP_MAX_MD_SIZE];
	int r;

	switch (part) {
351 352 353
	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
354 355
		break;
	case APK_MPART_BOUNDARY:
356 357
		EVP_DigestUpdate(&sctx->mdctx, data.ptr, data.len);

Timo Teräs's avatar
Timo Teräs committed
358 359 360
		/* We are not interested about checksums of signature,
		 * reset checksum if we are still in signatures */
		if (!sctx->control_started) {
361 362 363
			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
364 365 366 367 368 369 370 371 372 373 374 375 376
			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;

		/* Verify the signature if we have public key */
		if (sctx->action == APK_SIGN_VERIFY &&
		    sctx->signature.pkey != NULL) {
377
			r = EVP_VerifyFinal(&sctx->mdctx,
Timo Teräs's avatar
Timo Teräs committed
378 379 380 381 382 383 384
					   (unsigned char *) sctx->signature.data.ptr,
					   sctx->signature.data.len,
					   sctx->signature.pkey);
			if (r != 1)
				return 1;

			sctx->control_verified = 1;
385 386
			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
387 388 389 390
			return 0;
		} else if (sctx->action == APK_SIGN_GENERATE &&
			   sctx->has_data_checksum) {
			/* Package identity is checksum of control block */
391 392
			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
393 394 395
			return 1;
		} else {
			/* Reset digest for hashing data */
396 397 398
			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
399 400 401 402
		}
		break;
	case APK_MPART_END:
		if (sctx->action == APK_SIGN_VERIFY) {
403 404
			if (sctx->has_data_checksum) {
				/* Check that data checksum matches */
405 406
				EVP_DigestFinal_ex(&sctx->mdctx, calculated, NULL);
				if (EVP_MD_CTX_size(&sctx->mdctx) != 0 &&
407
				    memcmp(calculated, sctx->data_checksum,
408
				           EVP_MD_CTX_size(&sctx->mdctx)) == 0)
409 410 411
					sctx->data_verified = 1;
			} else if (sctx->signature.pkey != NULL) {
				/* Assume that the data is fully signed */
412
				r = EVP_VerifyFinal(&sctx->mdctx,
413 414 415 416 417 418 419 420
					   (unsigned char *) sctx->signature.data.ptr,
					   sctx->signature.data.len,
					   sctx->signature.pkey);
				if (r == 1) {
					sctx->control_verified = 1;
					sctx->data_verified = 1;
				}
			}
Timo Teräs's avatar
Timo Teräs committed
421
		} else if (!sctx->has_data_checksum) {
Timo Teräs's avatar
Timo Teräs committed
422
			/* Package identity is checksum of all data */
423 424
			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
425 426 427 428 429 430
		}
		return 1;
	}
	return 0;
}

431 432 433
struct read_info_ctx {
	struct apk_database *db;
	struct apk_package *pkg;
Timo Teräs's avatar
Timo Teräs committed
434 435
	struct apk_sign_ctx *sctx;
	int version;
436
	int has_install : 1;
437 438
};

439 440
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
441 442 443
{
	switch (field) {
	case 'P':
444
		pkg->name = apk_db_get_name(db, value);
Timo Teräs's avatar
Timo Teräs committed
445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461
		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
462
		apk_blob_pull_csum(&value, &pkg->csum);
Timo Teräs's avatar
Timo Teräs committed
463 464
		break;
	case 'S':
465
		pkg->size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
466 467
		break;
	case 'I':
468
		pkg->installed_size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
469
		break;
470 471
	default:
		return -1;
Timo Teräs's avatar
Timo Teräs committed
472
	}
473 474
	if (APK_BLOB_IS_NULL(value))
		return -1;
Timo Teräs's avatar
Timo Teräs committed
475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498
	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;

499
	if (!apk_blob_split(line, APK_BLOB_STR(" = "), &l, &r))
Timo Teräs's avatar
Timo Teräs committed
500 501 502
		return 0;

	for (i = 0; i < ARRAY_SIZE(fields); i++) {
503
		if (apk_blob_compare(APK_BLOB_STR(fields[i].str), l) == 0) {
504
			apk_pkg_add_info(ri->db, ri->pkg, fields[i].field, r);
505
			return 0;
Timo Teräs's avatar
Timo Teräs committed
506 507 508
		}
	}

Timo Teräs's avatar
Timo Teräs committed
509 510 511 512 513 514 515 516
	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)));
	}
517

Timo Teräs's avatar
Timo Teräs committed
518 519 520
	return 0;
}

521
static int read_info_entry(void *ctx, const struct apk_file_info *ae,
522
			   struct apk_istream *is)
523
{
Timo Teräs's avatar
Timo Teräs committed
524 525 526 527 528
	static struct {
		const char *str;
		char field;
	} fields[] = {
		{ "DESC",	'T' },
529
		{ "WWW",	'U' },
Timo Teräs's avatar
Timo Teräs committed
530 531 532
		{ "LICENSE",	'L' },
		{ "DEPEND", 	'D' },
	};
533 534 535 536
	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;
537
	char *slash;
Timo Teräs's avatar
Timo Teräs committed
538
	int i;
539

Timo Teräs's avatar
Timo Teräs committed
540
	/* Meta info and scripts */
Timo Teräs's avatar
Timo Teräs committed
541 542
	if (apk_sign_ctx_process_file(ri->sctx, ae, is) == 0)
		return 0;
543

Timo Teräs's avatar
Timo Teräs committed
544
	if (ae->name[0] == '.') {
Timo Teräs's avatar
Timo Teräs committed
545 546
		/* APK 2.0 format */
		if (strcmp(ae->name, ".PKGINFO") == 0) {
547
			apk_blob_t blob = apk_blob_from_istream(is, ae->size);
Timo Teräs's avatar
Timo Teräs committed
548 549
			apk_blob_for_each_segment(blob, "\n", read_info_line, ctx);
			free(blob.ptr);
550 551
			ri->version = 2;
		} else if (strcmp(ae->name, ".INSTALL") == 0) {
552 553
			apk_warning("Package '%s-%s' contains deprecated .INSTALL",
				    pkg->name->name, pkg->version);
Timo Teräs's avatar
Timo Teräs committed
554
		}
555 556 557 558
		return 0;
	}

	if (strncmp(ae->name, "var/db/apk/", 11) == 0) {
Timo Teräs's avatar
Timo Teräs committed
559
		/* APK 1.0 format */
560
		ri->version = 1;
Timo Teräs's avatar
Timo Teräs committed
561 562
		if (!S_ISREG(ae->mode))
			return 0;
563

Timo Teräs's avatar
Timo Teräs committed
564 565 566
		slash = strchr(&ae->name[11], '/');
		if (slash == NULL)
			return 0;
567

Timo Teräs's avatar
Timo Teräs committed
568 569 570
		if (apk_pkg_parse_name(APK_BLOB_PTR_PTR(&ae->name[11], slash-1),
				       &name, &version) < 0)
			return -1;
571

572 573
		if (pkg->name == NULL)
			pkg->name = apk_db_get_name(db, name);
Timo Teräs's avatar
Timo Teräs committed
574 575 576 577 578
		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) {
579
				apk_blob_t blob = apk_blob_from_istream(is, ae->size);
580 581
				apk_pkg_add_info(ri->db, ri->pkg, fields[i].field,
						 trim(blob));
Timo Teräs's avatar
Timo Teräs committed
582 583 584
				free(blob.ptr);
				break;
			}
585
		}
Timo Teräs's avatar
Timo Teräs committed
586 587 588
		if (apk_script_type(slash+1) == APK_SCRIPT_POST_INSTALL ||
		    apk_script_type(slash+1) == APK_SCRIPT_PRE_INSTALL)
			ri->has_install = 1;
589
	} else if (ri->version < 2) {
590 591
		/* Version 1.x packages do not contain installed size
		 * in metadata, so we calculate it here */
592
		pkg->installed_size += apk_calc_installed_size(ae->size);
Timo Teräs's avatar
Timo Teräs committed
593
	}
594 595 596 597

	return 0;
}

598
struct apk_package *apk_pkg_read(struct apk_database *db, const char *file,
Timo Teräs's avatar
Timo Teräs committed
599
				 struct apk_sign_ctx *sctx)
600 601
{
	struct read_info_ctx ctx;
602
	struct apk_file_info fi;
603
	struct apk_bstream *bs;
604
	struct apk_istream *tar;
605
	char realfile[PATH_MAX];
606
	int r;
607 608 609

	if (realpath(file, realfile) < 0)
		return NULL;
610 611
	if (apk_file_get_info(realfile, APK_CHECKSUM_NONE, &fi) < 0)
		return NULL;
612

613
	memset(&ctx, 0, sizeof(ctx));
Timo Teräs's avatar
Timo Teräs committed
614
	ctx.sctx = sctx;
615
	ctx.pkg = apk_pkg_new();
616 617 618
	if (ctx.pkg == NULL)
		return NULL;

619
	bs = apk_bstream_from_file(realfile);
Timo Teräs's avatar
Timo Teräs committed
620
	if (bs == NULL)
621 622 623 624
		goto err;

	ctx.db = db;
	ctx.has_install = 0;
625
	ctx.pkg->size = fi.size;
626

Timo Teräs's avatar
Timo Teräs committed
627
	tar = apk_bstream_gunzip_mpart(bs, apk_sign_ctx_mpart_cb, sctx);
628 629
	r = apk_tar_parse(tar, read_info_entry, &ctx);
	tar->close(tar);
Timo Teräs's avatar
Timo Teräs committed
630
	if (r < 0)
631
		goto err;
Timo Teräs's avatar
Timo Teräs committed
632
	if (ctx.pkg->name == NULL)
633
		goto err;
Timo Teräs's avatar
Timo Teräs committed
634 635
	if (sctx->action == APK_SIGN_VERIFY && !sctx->data_verified &&
	    !(apk_flags & APK_FORCE))
636
		goto err;
Timo Teräs's avatar
Timo Teräs committed
637 638
	if (sctx->action != APK_SIGN_VERIFY)
		ctx.pkg->csum = sctx->identity;
639 640 641 642

	/* Add implicit busybox dependency if there is scripts */
	if (ctx.has_install) {
		struct apk_dependency dep = {
643
			.name = apk_db_get_name(db, APK_BLOB_STR("busybox")),
644 645 646
		};
		apk_deps_add(&ctx.pkg->depends, &dep);
	}
647
	ctx.pkg->filename = strdup(realfile);
648

649
	return apk_db_pkg_add(db, ctx.pkg);
650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665
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);

666 667
	if (pkg->depends)
		free(pkg->depends);
668 669 670 671 672 673 674 675 676 677 678 679 680
	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)
{
681
	if (list_hashed(&pkg->installed_pkgs_list))
682 683
		return APK_PKG_INSTALLED;
	return APK_PKG_NOT_INSTALLED;
684 685
}

686 687 688
void apk_pkg_set_state(struct apk_database *db, struct apk_package *pkg, int state)
{
	switch (state) {
689
	case APK_PKG_INSTALLED:
690 691 692 693 694 695
		if (!list_hashed(&pkg->installed_pkgs_list)) {
			db->installed.stats.packages++;
			list_add_tail(&pkg->installed_pkgs_list,
				      &db->installed.packages);
		}
		break;
696
	case APK_PKG_NOT_INSTALLED:
697 698 699 700 701 702 703 704
		if (list_hashed(&pkg->installed_pkgs_list)) {
			db->installed.stats.packages--;
			list_del(&pkg->installed_pkgs_list);
		}
		break;
	}
}

705
int apk_pkg_add_script(struct apk_package *pkg, struct apk_istream *is,
706 707 708 709 710 711 712 713
		       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;
714
	r = is->read(is, script->script, size);
715 716 717 718 719 720 721 722 723
	if (r < 0) {
		free(script);
		return r;
	}

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

724
int apk_pkg_run_script(struct apk_package *pkg, int root_fd,
725 726
		       unsigned int type)
{
727 728 729 730
	static const char * const environment[] = {
		"PATH=/usr/sbin:/usr/bin:/sbin:/bin",
		NULL
	};
731 732 733 734 735 736
	struct apk_script *script;
	struct hlist_node *c;
	int fd, status;
	pid_t pid;
	char fn[1024];

737
	fchdir(root_fd);
738
	hlist_for_each_entry(script, c, &pkg->scripts, script_list) {
739
		if (script->type != type)
740 741 742 743 744
			continue;

		snprintf(fn, sizeof(fn),
			"tmp/%s-%s.%s",
			pkg->name->name, pkg->version,
Timo Teräs's avatar
Timo Teräs committed
745
			apk_script_types[type]);
746 747 748 749 750 751 752 753 754 755 756 757
		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) {
758 759
			if (chroot(".") < 0) {
				apk_error("chroot: %s", strerror(errno));
Timo Teräs's avatar
Timo Teräs committed
760
			} else {
Timo Teräs's avatar
Timo Teräs committed
761
				execle(fn, apk_script_types[type],
762
				       pkg->version, "", NULL, environment);
Timo Teräs's avatar
Timo Teräs committed
763
			}
764 765 766
			exit(1);
		}
		waitpid(pid, &status, 0);
Timo Teräs's avatar
Timo Teräs committed
767
		unlink(fn);
768 769 770 771 772 773 774 775
		if (WIFEXITED(status))
			return WEXITSTATUS(status);
		return -1;
	}

	return 0;
}

Timo Teräs's avatar
Timo Teräs committed
776
static int parse_index_line(void *ctx, apk_blob_t line)
777
{
Timo Teräs's avatar
Timo Teräs committed
778
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
779

Timo Teräs's avatar
Timo Teräs committed
780 781
	if (line.len < 3 || line.ptr[1] != ':')
		return 0;
782

783
	apk_pkg_add_info(ri->db, ri->pkg, line.ptr[0], APK_BLOB_PTR_LEN(line.ptr+2, line.len-2));
784 785 786 787 788
	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
789
	struct read_info_ctx ctx;
790

791
	ctx.pkg = apk_pkg_new();
Timo Teräs's avatar
Timo Teräs committed
792
	if (ctx.pkg == NULL)
793 794
		return NULL;

Timo Teräs's avatar
Timo Teräs committed
795
	ctx.db = db;
796
	ctx.version = 0;
Timo Teräs's avatar
Timo Teräs committed
797
	ctx.has_install = 0;
798

Timo Teräs's avatar
Timo Teräs committed
799 800 801 802
	apk_blob_for_each_segment(blob, "\n", parse_index_line, &ctx);

	if (ctx.pkg->name == NULL) {
		apk_pkg_free(ctx.pkg);
803 804
		apk_error("Failed to parse index entry: %.*s",
			  blob.len, blob.ptr);
Timo Teräs's avatar
Timo Teräs committed
805
		ctx.pkg = NULL;
806 807
	}

Timo Teräs's avatar
Timo Teräs committed
808
	return ctx.pkg;
809 810
}

811 812
int apk_pkg_write_index_entry(struct apk_package *info,
			      struct apk_ostream *os)
813
{
814
	char buf[512];
815 816 817 818
	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
819
	apk_blob_push_csum(&bbuf, &info->csum);
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835
	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
836 837 838
	if (APK_BLOB_IS_NULL(bbuf))
		return -1;

839
	if (os->write(os, buf, bbuf.ptr - buf) != bbuf.ptr - buf)
840
		return -1;
841 842

	if (info->depends != NULL) {
843 844 845 846 847 848 849
		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;
850 851
	}

852
	return 0;
853
}
854

855 856 857 858 859
int apk_pkg_version_compare(struct apk_package *a, struct apk_package *b)
{
	return apk_version_compare(a->version, b->version);
}

860 861 862 863 864 865 866 867 868 869 870 871 872
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++;
873
	}
874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890
	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,
	};
}