package.c 22.3 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
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
Natanael Copa's avatar
Natanael Copa committed
22
#include <sys/stat.h>
23

Timo Teräs's avatar
Timo Teräs committed
24 25
#include <openssl/pem.h>

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"
Natanael Copa's avatar
Natanael Copa committed
31
#include "apk_print.h"
32

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
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));
}

56
struct apk_package *apk_pkg_new(void)
57
{
Timo Teräs's avatar
Timo Teräs committed
58 59 60 61 62 63 64
	struct apk_package *pkg;

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

	return pkg;
65
}
66

67 68 69 70 71 72 73 74 75 76
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
77 78
	apk_string_array_init(&ipkg->triggers);
	apk_string_array_init(&ipkg->pending_triggers);
Timo Teräs's avatar
Timo Teräs committed
79 80 81 82 83 84 85

	/* 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);
	}
86 87 88 89 90 91 92 93 94 95 96 97 98 99

	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--;
100

101 102
	list_del(&ipkg->installed_pkgs_list);

Timo Teräs's avatar
Timo Teräs committed
103
	if (ipkg->triggers->num) {
104
		list_del(&ipkg->trigger_pkgs_list);
105
		list_init(&ipkg->trigger_pkgs_list);
106 107 108
		for (i = 0; i < ipkg->triggers->num; i++)
			free(ipkg->triggers->item[i]);
	}
Timo Teräs's avatar
Timo Teräs committed
109 110
	apk_string_array_free(&ipkg->triggers);
	apk_string_array_free(&ipkg->pending_triggers);
111 112 113 114 115 116

	for (i = 0; i < APK_SCRIPT_MAX; i++)
		if (ipkg->script[i].ptr != NULL)
			free(ipkg->script[i].ptr);
	free(ipkg);
	pkg->ipkg = NULL;
117 118
}

119 120 121 122 123 124
int apk_pkg_parse_name(apk_blob_t apkname,
		       apk_blob_t *name,
		       apk_blob_t *version)
{
	int i, dash = 0;

125 126 127
	if (APK_BLOB_IS_NULL(apkname))
		return -1;

128 129 130 131 132 133 134 135
	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;
	}
136 137 138
	if (i < 0)
		return -1;

139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
	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;
}

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
156 157
			if (deps->item[i].name == dep->name) {
				deps->item[i] = *dep;
158
				return 0;
Timo Teräs's avatar
Timo Teräs committed
159
			}
160 161 162 163 164 165
		}
	}

	*apk_dependency_array_add(depends) = *dep;
	return 0;
}
Timo Teräs's avatar
Timo Teräs committed
166

167 168 169 170 171 172 173 174 175 176 177 178 179 180
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];
Timo Teräs's avatar
Timo Teräs committed
181
		apk_dependency_array_resize(pdeps, deps->num-1);
182 183 184 185
		break;
	}
}

186 187 188 189 190
struct parse_depend_ctx {
	struct apk_database *db;
	struct apk_dependency_array **depends;
};

Timo Teräs's avatar
Timo Teräs committed
191 192
int apk_dep_from_blob(struct apk_dependency *dep, struct apk_database *db,
		      apk_blob_t blob)
193 194
{
	struct apk_name *name;
195 196
	apk_blob_t bname, bop, bver = APK_BLOB_NULL;
	int mask = APK_VERSION_LESS | APK_VERSION_EQUAL | APK_VERSION_GREATER;
197

198 199 200 201 202 203 204 205 206 207
	/* [!]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
208
			return -EINVAL;
209
		if (!apk_blob_spn(bop, "<>=", &bop, &bver))
Timo Teräs's avatar
Timo Teräs committed
210 211 212 213
			return -EINVAL;
		mask = 0;
		for (i = 0; i < bop.len; i++) {
			switch (bop.ptr[i]) {
214 215 216 217 218 219 220 221 222 223 224 225 226
			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
227
			return -EINVAL;
228 229

		if (!apk_version_validate(bver))
Timo Teräs's avatar
Timo Teräs committed
230 231 232
			return -EINVAL;

		blob = bname;
233 234
	}

Timo Teräs's avatar
Timo Teräs committed
235
	name = apk_db_get_name(db, blob);
236
	if (name == NULL)
Timo Teräs's avatar
Timo Teräs committed
237
		return -ENOENT;
238 239 240

	*dep = (struct apk_dependency){
		.name = name,
241 242
		.version = APK_BLOB_IS_NULL(bver) ? NULL : apk_blob_cstr(bver),
		.result_mask = mask,
243
	};
Timo Teräs's avatar
Timo Teräs committed
244 245 246 247 248 249 250
	return 0;
}

void apk_dep_from_pkg(struct apk_dependency *dep, struct apk_database *db,
		      struct apk_package *pkg)
{
	*dep = (struct apk_dependency) {
251
		.name = pkg->name,
Timo Teräs's avatar
Timo Teräs committed
252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271
		.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;
272 273 274 275

	return 0;
}

276 277 278 279
void apk_deps_parse(struct apk_database *db,
		    struct apk_dependency_array **depends,
		    apk_blob_t blob)
{
280
	struct parse_depend_ctx ctx = { db, depends };
281

282
	if (blob.len > 0 && blob.ptr[blob.len-1] == '\n')
283
		blob.len--;
284

285
	apk_blob_for_each_segment(blob, " ", parse_depend, &ctx);
286 287
}

288 289 290 291 292 293 294 295 296 297 298 299 300 301
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));
	}
}

302 303
int apk_deps_write(struct apk_dependency_array *deps, struct apk_ostream *os)
{
304 305 306
	apk_blob_t blob;
	char tmp[256];
	int i, n = 0;
307 308 309 310 311

	if (deps == NULL)
		return 0;

	for (i = 0; i < deps->num; i++) {
312 313 314 315 316 317 318 319 320
		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;
321

322
		n += blob.len;
323 324 325 326 327
	}

	return n;
}

Timo Teräs's avatar
Timo Teräs committed
328
const char *apk_script_types[] = {
329 330 331 332 333 334
	[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",
335
	[APK_SCRIPT_TRIGGER]		= "trigger",
336 337 338 339 340 341
};

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

Timo Teräs's avatar
Timo Teräs committed
342 343 344
	for (i = 0; i < ARRAY_SIZE(apk_script_types); i++)
		if (apk_script_types[i] &&
		    strcmp(apk_script_types[i], name) == 0)
345 346
			return i;

347
	return APK_SCRIPT_INVALID;
348 349
}

350
void apk_sign_ctx_init(struct apk_sign_ctx *ctx, int action,
351
		       struct apk_checksum *identity, int keys_fd)
Timo Teräs's avatar
Timo Teräs committed
352 353
{
	memset(ctx, 0, sizeof(struct apk_sign_ctx));
354
	ctx->keys_fd = keys_fd;
Timo Teräs's avatar
Timo Teräs committed
355 356
	ctx->action = action;
	switch (action) {
Timo Teräs's avatar
Timo Teräs committed
357 358 359
	case APK_SIGN_VERIFY:
		ctx->md = EVP_md_null();
		break;
360 361 362 363 364 365 366 367 368 369
	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
370 371
	case APK_SIGN_GENERATE_V1:
		ctx->md = EVP_md5();
Timo Teräs's avatar
Timo Teräs committed
372 373
		ctx->control_started = 1;
		ctx->data_started = 1;
Timo Teräs's avatar
Timo Teräs committed
374 375
		break;
	case APK_SIGN_GENERATE:
376
	case APK_SIGN_VERIFY_AND_GENERATE:
Timo Teräs's avatar
Timo Teräs committed
377 378
		ctx->md = EVP_sha1();
		break;
379 380 381 382 383 384
	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
385
	}
386 387
	EVP_MD_CTX_init(&ctx->mdctx);
	EVP_DigestInit_ex(&ctx->mdctx, ctx->md, NULL);
388
	EVP_MD_CTX_set_flags(&ctx->mdctx, EVP_MD_CTX_FLAG_ONESHOT);
Timo Teräs's avatar
Timo Teräs committed
389 390 391 392 393 394 395 396
}

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);
397
	EVP_MD_CTX_cleanup(&ctx->mdctx);
Timo Teräs's avatar
Timo Teräs committed
398 399 400 401 402 403 404 405 406
}

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;

407
	if (fi->name[0] != '.' || strchr(fi->name, '/') != NULL) {
Timo Teräs's avatar
Timo Teräs committed
408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
		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 */
425 426
	if ((ctx->action != APK_SIGN_VERIFY &&
	     ctx->action != APK_SIGN_VERIFY_AND_GENERATE) ||
427
	    ctx->signature.pkey != NULL)
Timo Teräs's avatar
Timo Teräs committed
428 429
		return 0;

430 431 432
	if (ctx->keys_fd < 0)
		return 0;

Timo Teräs's avatar
Timo Teräs committed
433 434
	if (strncmp(&fi->name[6], "RSA.", 4) == 0 ||
	    strncmp(&fi->name[6], "DSA.", 4) == 0) {
435
		int fd = openat(ctx->keys_fd, &fi->name[10], O_RDONLY|O_CLOEXEC);
436 437 438 439 440
	        BIO *bio;

		if (fd < 0)
			return 0;

441
		bio = BIO_new_fp(fdopen(fd, "r"), BIO_CLOSE);
442
		ctx->signature.pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL);
Timo Teräs's avatar
Timo Teräs committed
443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458
		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;
}

459
int apk_sign_ctx_parse_pkginfo_line(void *ctx, apk_blob_t line)
460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491
{
	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);
492 493 494
		apk_blob_for_each_segment(
			blob, "\n",
			apk_sign_ctx_parse_pkginfo_line, ctx);
495 496 497 498 499 500
		free(blob.ptr);
	}

	return 0;
}

501
int apk_sign_ctx_mpart_cb(void *ctx, int part, apk_blob_t data)
Timo Teräs's avatar
Timo Teräs committed
502 503 504
{
	struct apk_sign_ctx *sctx = (struct apk_sign_ctx *) ctx;
	unsigned char calculated[EVP_MAX_MD_SIZE];
Timo Teräs's avatar
Timo Teräs committed
505 506 507 508 509 510 511
	int r, end_of_control;

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

	/* Still in signature blocks? */
512 513 514
	if (!sctx->control_started) {
		if (part == APK_MPART_END)
			return -EKEYREJECTED;
Timo Teräs's avatar
Timo Teräs committed
515
		goto reset_digest;
516
	}
Timo Teräs's avatar
Timo Teräs committed
517 518 519 520 521 522

	/* 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? */
523 524
	if (sctx->has_data_checksum == 0 && end_of_control &&
	    part != APK_MPART_END)
Timo Teräs's avatar
Timo Teräs committed
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545
		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
546

Timo Teräs's avatar
Timo Teräs committed
547 548
	switch (sctx->action) {
	case APK_SIGN_VERIFY:
549
	case APK_SIGN_VERIFY_AND_GENERATE:
Timo Teräs's avatar
Timo Teräs committed
550 551 552 553
		if (sctx->signature.pkey == NULL) {
			if (apk_flags & APK_ALLOW_UNTRUSTED)
				break;
			return -ENOKEY;
Timo Teräs's avatar
Timo Teräs committed
554 555
		}

Timo Teräs's avatar
Timo Teräs committed
556 557 558 559 560 561 562 563
		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)
564
			sctx->data_verified = 1;
Timo Teräs's avatar
Timo Teräs committed
565 566 567 568 569 570 571 572 573
		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)
574
			sctx->data_verified = 1;
Timo Teräs's avatar
Timo Teräs committed
575 576 577 578 579 580 581 582 583
		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;
584
		break;
Timo Teräs's avatar
Timo Teräs committed
585
	}
586 587 588 589
	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
590 591 592 593 594 595 596 597
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
598 599 600
	return 0;
}

601 602 603
struct read_info_ctx {
	struct apk_database *db;
	struct apk_package *pkg;
Timo Teräs's avatar
Timo Teräs committed
604
	struct apk_sign_ctx *sctx;
605 606
};

607 608
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
609 610 611
{
	switch (field) {
	case 'P':
612
		pkg->name = apk_db_get_name(db, value);
Timo Teräs's avatar
Timo Teräs committed
613 614 615 616 617 618 619 620 621 622 623 624 625
		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;
626 627 628
	case 'A':
		pkg->arch = apk_blob_cstr(value);
		break;
Timo Teräs's avatar
Timo Teräs committed
629 630 631 632
	case 'D':
		apk_deps_parse(db, &pkg->depends, value);
		break;
	case 'C':
Timo Teräs's avatar
Timo Teräs committed
633
		apk_blob_pull_csum(&value, &pkg->csum);
Timo Teräs's avatar
Timo Teräs committed
634 635
		break;
	case 'S':
636
		pkg->size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
637 638
		break;
	case 'I':
639
		pkg->installed_size = apk_blob_pull_uint(&value, 10);
Timo Teräs's avatar
Timo Teräs committed
640
		break;
641 642
	default:
		return -1;
Timo Teräs's avatar
Timo Teräs committed
643
	}
644 645
	if (APK_BLOB_IS_NULL(value))
		return -1;
Timo Teräs's avatar
Timo Teräs committed
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660
	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' },
661
		{ "arch",    'A' },
Timo Teräs's avatar
Timo Teräs committed
662 663 664 665 666 667 668 669 670
		{ "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;

671
	if (!apk_blob_split(line, APK_BLOB_STR(" = "), &l, &r))
Timo Teräs's avatar
Timo Teräs committed
672 673 674
		return 0;

	for (i = 0; i < ARRAY_SIZE(fields); i++) {
675
		if (apk_blob_compare(APK_BLOB_STR(fields[i].str), l) == 0) {
676
			apk_pkg_add_info(ri->db, ri->pkg, fields[i].field, r);
677
			return 0;
Timo Teräs's avatar
Timo Teräs committed
678 679
		}
	}
680
	apk_sign_ctx_parse_pkginfo_line(ri->sctx, line);
681

Timo Teräs's avatar
Timo Teräs committed
682 683 684
	return 0;
}

685
static int read_info_entry(void *ctx, const struct apk_file_info *ae,
686
			   struct apk_istream *is)
687 688 689 690
{
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
	struct apk_package *pkg = ri->pkg;

Timo Teräs's avatar
Timo Teräs committed
691
	/* Meta info and scripts */
Timo Teräs's avatar
Timo Teräs committed
692 693
	if (apk_sign_ctx_process_file(ri->sctx, ae, is) == 0)
		return 0;
694

Timo Teräs's avatar
Timo Teräs committed
695
	if (ae->name[0] == '.') {
Timo Teräs's avatar
Timo Teräs committed
696 697
		/* APK 2.0 format */
		if (strcmp(ae->name, ".PKGINFO") == 0) {
698
			apk_blob_t blob = apk_blob_from_istream(is, ae->size);
Timo Teräs's avatar
Timo Teräs committed
699 700
			apk_blob_for_each_segment(blob, "\n", read_info_line, ctx);
			free(blob.ptr);
701
		} else if (strcmp(ae->name, ".INSTALL") == 0) {
702 703
			apk_warning("Package '%s-%s' contains deprecated .INSTALL",
				    pkg->name->name, pkg->version);
Timo Teräs's avatar
Timo Teräs committed
704
		}
705 706 707
		return 0;
	}

708 709 710
	return 0;
}

711 712
int apk_pkg_read(struct apk_database *db, const char *file,
	         struct apk_sign_ctx *sctx, struct apk_package **pkg)
713 714
{
	struct read_info_ctx ctx;
715
	struct apk_file_info fi;
716
	struct apk_bstream *bs;
717
	struct apk_istream *tar;
718
	int r;
719

720
	r = apk_file_get_info(AT_FDCWD, file, APK_CHECKSUM_NONE, &fi);
721 722
	if (r != 0)
		return r;
723

724
	memset(&ctx, 0, sizeof(ctx));
Timo Teräs's avatar
Timo Teräs committed
725
	ctx.sctx = sctx;
726
	ctx.pkg = apk_pkg_new();
727
	r = -ENOMEM;
728
	if (ctx.pkg == NULL)
729
		goto err;
730
	bs = apk_bstream_from_file(AT_FDCWD, file);
Timo Teräs's avatar
Timo Teräs committed
731
	if (bs == NULL)
732 733 734
		goto err;

	ctx.db = db;
735
	ctx.pkg->size = fi.size;
736

Timo Teräs's avatar
Timo Teräs committed
737
	tar = apk_bstream_gunzip_mpart(bs, apk_sign_ctx_mpart_cb, sctx);
738
	r = apk_tar_parse(tar, read_info_entry, &ctx, FALSE, &db->id_cache);
739
	tar->close(tar);
Timo Teräs's avatar
Timo Teräs committed
740
	if (r < 0 && r != -ECANCELED)
741
		goto err;
742
	if (ctx.pkg->name == NULL) {
743
		r = -ENOMSG;
744
		goto err;
745
	}
Timo Teräs's avatar
Timo Teräs committed
746 747
	if (sctx->action != APK_SIGN_VERIFY)
		ctx.pkg->csum = sctx->identity;
748
	ctx.pkg->filename = strdup(file);
749

750 751 752
	ctx.pkg = apk_db_pkg_add(db, ctx.pkg);
	if (pkg != NULL)
		*pkg = ctx.pkg;
753
	return 0;
754 755
err:
	apk_pkg_free(ctx.pkg);
756
	return r;
757 758 759 760 761 762 763
}

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

764
	apk_pkg_uninstall(NULL, pkg);
Timo Teräs's avatar
Timo Teräs committed
765
	apk_dependency_array_free(&pkg->depends);
766 767 768 769 770 771 772 773
	if (pkg->version)
		free(pkg->version);
	if (pkg->url)
		free(pkg->url);
	if (pkg->description)
		free(pkg->description);
	if (pkg->license)
		free(pkg->license);
774 775
	if (pkg->arch)
		free(pkg->arch);
776 777 778
	free(pkg);
}

779 780 781
int apk_ipkg_add_script(struct apk_installed_package *ipkg,
			struct apk_istream *is,
			unsigned int type, unsigned int size)
782
{
783
	void *ptr;
784 785
	int r;

786 787 788 789 790
	if (type >= APK_SCRIPT_MAX)
		return -1;

	ptr = malloc(size);
	r = is->read(is, ptr, size);
791
	if (r < 0) {
792
		free(ptr);
793 794 795
		return r;
	}

796 797 798 799 800
	if (ipkg->script[type].ptr)
		free(ipkg->script[type].ptr);
	ipkg->script[type].ptr = ptr;
	ipkg->script[type].len = size;
	return 0;
801 802
}

803 804
int apk_ipkg_run_script(struct apk_installed_package *ipkg,
			struct apk_database *db,
805
			unsigned int type, char **argv)
806
{
807
	static char * const environment[] = {
808 809 810
		"PATH=/usr/sbin:/usr/bin:/sbin:/bin",
		NULL
	};
811 812
	struct apk_package *pkg = ipkg->pkg;
	char fn[PATH_MAX];
813
	int fd, status, root_fd = db->root_fd;
814 815
	pid_t pid;

816 817
	if (type >= APK_SCRIPT_MAX)
		return -1;
818

819 820 821 822
	if (ipkg->script[type].ptr == NULL)
		return 0;

	argv[0] = (char *) apk_script_types[type];
823

824 825 826 827 828
	/* 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]);

829 830 831 832
	apk_message("Executing %s", &fn[15]);
	if (apk_flags & APK_SIMULATE)
		return 0;

833
	fd = openat(root_fd, fn, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC, 0755);
834 835
	if (fd < 0) {
		mkdirat(root_fd, "var/cache/misc", 0755);
836
		fd = openat(root_fd, fn, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC, 0755);
837 838 839
		if (fd < 0)
			return -errno;
	}
840 841 842 843
	if (write(fd, ipkg->script[type].ptr, ipkg->script[type].len) < 0) {
		close(fd);
		return -errno;
	}
844
	close(fd);
845

846 847
	pid = fork();
	if (pid == -1)
848
		return -1;
849
	if (pid == 0) {
850
		if (fchdir(root_fd) < 0 || chroot(".") < 0) {
851 852 853 854 855
			apk_error("chroot: %s", strerror(errno));
		} else {
			execve(fn, argv, environment);
		}
		exit(1);
856
	}
857 858
	waitpid(pid, &status, 0);
	unlinkat(root_fd, fn, 0);
859
	apk_id_cache_reset(&db->id_cache);
860

861 862 863
	if (WIFEXITED(status))
		return WEXITSTATUS(status);
	return -1;
864 865
}

Timo Teräs's avatar
Timo Teräs committed
866
static int parse_index_line(void *ctx, apk_blob_t line)
867
{
Timo Teräs's avatar
Timo Teräs committed
868
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
869

Timo Teräs's avatar
Timo Teräs committed
870 871
	if (line.len < 3 || line.ptr[1] != ':')
		return 0;
872

873
	apk_pkg_add_info(ri->db, ri->pkg, line.ptr[0], APK_BLOB_PTR_LEN(line.ptr+2, line.len-2));
874 875 876 877 878
	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
879
	struct read_info_ctx ctx;
880

881
	ctx.pkg = apk_pkg_new();
Timo Teräs's avatar
Timo Teräs committed
882
	if (ctx.pkg == NULL)
883 884
		return NULL;

Timo Teräs's avatar
Timo Teräs committed
885
	ctx.db = db;
886

Timo Teräs's avatar
Timo Teräs committed
887 888 889 890
	apk_blob_for_each_segment(blob, "\n", parse_index_line, &ctx);

	if (ctx.pkg->name == NULL) {
		apk_pkg_free(ctx.pkg);
891 892
		apk_error("Failed to parse index entry: %.*s",
			  blob.len, blob.ptr);
Timo Teräs's avatar
Timo Teräs committed
893
		ctx.pkg = NULL;
894 895
	}

Timo Teräs's avatar
Timo Teräs committed
896
	return ctx.pkg;
897 898
}

899 900
int apk_pkg_write_index_entry(struct apk_package *info,
			      struct apk_ostream *os)
901
{
902
	char buf[512];
903 904 905 906
	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
907
	apk_blob_push_csum(&bbuf, &info->csum);
908 909 910 911
	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));
912 913 914 915
	if (info->arch != NULL) {
		apk_blob_push_blob(&bbuf, APK_BLOB_STR("\nA:"));
		apk_blob_push_blob(&bbuf, APK_BLOB_STR(info->arch));
	}
916 917 918 919 920 921 922 923 924 925 926 927
	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
928 929 930
	if (APK_BLOB_IS_NULL(bbuf))
		return -1;

931 932
	bbuf = apk_blob_pushed(APK_BLOB_BUF(buf), bbuf);
	if (os->write(os, bbuf.ptr, bbuf.len) != bbuf.len)
933
		return -1;
934

Timo Teräs's avatar
Timo Teräs committed
935
	if (info->depends->num > 0) {
936 937 938 939 940 941 942
		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;
943 944
	}

945
	return 0;
946
}
947

948 949 950 951
int apk_pkg_version_compare(struct apk_package *a, struct apk_package *b)
{
	return apk_version_compare(a->version, b->version);
}