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-rw-r--r--onlineupdate/source/libmar/src/Makefile.in13
-rw-r--r--onlineupdate/source/libmar/src/mar_create.c398
-rw-r--r--onlineupdate/source/libmar/src/mar_extract.c85
-rw-r--r--onlineupdate/source/libmar/src/mar_read.c572
4 files changed, 1068 insertions, 0 deletions
diff --git a/onlineupdate/source/libmar/src/Makefile.in b/onlineupdate/source/libmar/src/Makefile.in
new file mode 100644
index 000000000..1da582e5b
--- /dev/null
+++ b/onlineupdate/source/libmar/src/Makefile.in
@@ -0,0 +1,13 @@
+# vim:set ts=8 sw=8 sts=8 noet:
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# This makefile just builds support for reading archives.
+
+include $(topsrcdir)/config/rules.mk
+
+# The intermediate (.ii/.s) files for host and target can have the same name...
+# disable parallel builds
+.NOTPARALLEL:
diff --git a/onlineupdate/source/libmar/src/mar_create.c b/onlineupdate/source/libmar/src/mar_create.c
new file mode 100644
index 000000000..599e0a2a7
--- /dev/null
+++ b/onlineupdate/source/libmar/src/mar_create.c
@@ -0,0 +1,398 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <onlineupdate/mar_private.h>
+#include <onlineupdate/mar_cmdline.h>
+#include <onlineupdate/mar.h>
+
+#ifdef _WIN32
+#include <winsock2.h>
+#else
+#include <netinet/in.h>
+#include <unistd.h>
+#endif
+
+struct MarItemStack {
+ void *head;
+ uint32_t size_used;
+ uint32_t size_allocated;
+ uint32_t last_offset;
+};
+
+/**
+ * Push a new item onto the stack of items. The stack is a single block
+ * of memory.
+ */
+static int mar_push(struct MarItemStack *stack, uint32_t length, uint32_t flags,
+ const char *name) {
+ int namelen;
+ uint32_t n_offset, n_length, n_flags;
+ uint32_t size;
+ char *data;
+
+ namelen = strlen(name);
+ size = MAR_ITEM_SIZE(namelen);
+
+ if (stack->size_allocated - stack->size_used < size) {
+ /* increase size of stack */
+ size_t size_needed = ROUND_UP(stack->size_used + size, BLOCKSIZE);
+ stack->head = realloc(stack->head, size_needed);
+ if (!stack->head)
+ return -1;
+ stack->size_allocated = size_needed;
+ }
+
+ data = (((char *) stack->head) + stack->size_used);
+
+ n_offset = htonl(stack->last_offset);
+ n_length = htonl(length);
+ n_flags = htonl(flags);
+
+ memcpy(data, &n_offset, sizeof(n_offset));
+ data += sizeof(n_offset);
+
+ memcpy(data, &n_length, sizeof(n_length));
+ data += sizeof(n_length);
+
+ memcpy(data, &n_flags, sizeof(n_flags));
+ data += sizeof(n_flags);
+
+ memcpy(data, name, namelen + 1);
+
+ stack->size_used += size;
+ stack->last_offset += length;
+ return 0;
+}
+
+static int mar_concat_file(FILE *fp, const char *path) {
+ FILE *in;
+ char buf[BLOCKSIZE];
+ size_t len;
+ int rv = 0;
+
+ in = fopen(path, "rb");
+ if (!in) {
+ fprintf(stderr, "ERROR: could not open file in mar_concat_file()\n");
+ perror(path);
+ return -1;
+ }
+
+ while ((len = fread(buf, 1, BLOCKSIZE, in)) > 0) {
+ if (fwrite(buf, len, 1, fp) != 1) {
+ rv = -1;
+ break;
+ }
+ }
+
+ fclose(in);
+ return rv;
+}
+
+/**
+ * Writes out the product information block to the specified file.
+ *
+ * @param fp The opened MAR file being created.
+ * @param stack A pointer to the MAR item stack being used to create
+ * the MAR
+ * @param infoBlock The product info block to store in the file.
+ * @return 0 on success.
+*/
+static int
+mar_concat_product_info_block(FILE *fp,
+ struct MarItemStack *stack,
+ struct ProductInformationBlock *infoBlock)
+{
+ char buf[PIB_MAX_MAR_CHANNEL_ID_SIZE + PIB_MAX_PRODUCT_VERSION_SIZE];
+ uint32_t additionalBlockID = 1, infoBlockSize, unused;
+ if (!fp || !infoBlock ||
+ !infoBlock->MARChannelID ||
+ !infoBlock->productVersion) {
+ return -1;
+ }
+
+ /* The MAR channel name must be < 64 bytes per the spec */
+ if (strlen(infoBlock->MARChannelID) > PIB_MAX_MAR_CHANNEL_ID_SIZE) {
+ return -1;
+ }
+
+ /* The product version must be < 32 bytes per the spec */
+ if (strlen(infoBlock->productVersion) > PIB_MAX_PRODUCT_VERSION_SIZE) {
+ return -1;
+ }
+
+ /* Although we don't need the product information block size to include the
+ maximum MAR channel name and product version, we allocate the maximum
+ amount to make it easier to modify the MAR file for repurposing MAR files
+ to different MAR channels. + 2 is for the NULL terminators. */
+ infoBlockSize = sizeof(infoBlockSize) +
+ sizeof(additionalBlockID) +
+ PIB_MAX_MAR_CHANNEL_ID_SIZE +
+ PIB_MAX_PRODUCT_VERSION_SIZE + 2;
+ if (stack) {
+ stack->last_offset += infoBlockSize;
+ }
+
+ /* Write out the product info block size */
+ infoBlockSize = htonl(infoBlockSize);
+ if (fwrite(&infoBlockSize,
+ sizeof(infoBlockSize), 1, fp) != 1) {
+ return -1;
+ }
+ infoBlockSize = ntohl(infoBlockSize);
+
+ /* Write out the product info block ID */
+ additionalBlockID = htonl(additionalBlockID);
+ if (fwrite(&additionalBlockID,
+ sizeof(additionalBlockID), 1, fp) != 1) {
+ return -1;
+ }
+ additionalBlockID = ntohl(additionalBlockID);
+
+ /* Write out the channel name and NULL terminator */
+ if (fwrite(infoBlock->MARChannelID,
+ strlen(infoBlock->MARChannelID) + 1, 1, fp) != 1) {
+ return -1;
+ }
+
+ /* Write out the product version string and NULL terminator */
+ if (fwrite(infoBlock->productVersion,
+ strlen(infoBlock->productVersion) + 1, 1, fp) != 1) {
+ return -1;
+ }
+
+ /* Write out the rest of the block that is unused */
+ unused = infoBlockSize - (sizeof(infoBlockSize) +
+ sizeof(additionalBlockID) +
+ strlen(infoBlock->MARChannelID) +
+ strlen(infoBlock->productVersion) + 2);
+ memset(buf, 0, sizeof(buf));
+ if (fwrite(buf, unused, 1, fp) != 1) {
+ return -1;
+ }
+ return 0;
+}
+
+/**
+ * Refreshes the product information block with the new information.
+ * The input MAR must not be signed or the function call will fail.
+ *
+ * @param path The path to the MAR file whose product info block
+ * should be refreshed.
+ * @param infoBlock Out parameter for where to store the result to
+ * @return 0 on success, -1 on failure
+*/
+int
+refresh_product_info_block(const char *path,
+ struct ProductInformationBlock *infoBlock)
+{
+ FILE *fp ;
+ int rv;
+ uint32_t numSignatures, additionalBlockSize, additionalBlockID,
+ offsetAdditionalBlocks, numAdditionalBlocks, i;
+ int additionalBlocks, hasSignatureBlock;
+
+ rv = get_mar_file_info(path,
+ &hasSignatureBlock,
+ &numSignatures,
+ &additionalBlocks,
+ &offsetAdditionalBlocks,
+ &numAdditionalBlocks);
+ if (rv) {
+ fprintf(stderr, "ERROR: Could not obtain MAR information.\n");
+ return -1;
+ }
+
+ if (hasSignatureBlock && numSignatures) {
+ fprintf(stderr, "ERROR: Cannot refresh a signed MAR\n");
+ return -1;
+ }
+
+ fp = fopen(path, "r+b");
+ if (!fp) {
+ fprintf(stderr, "ERROR: could not open target file: %s\n", path);
+ return -1;
+ }
+
+ if (fseeko(fp, offsetAdditionalBlocks, SEEK_SET)) {
+ fprintf(stderr, "ERROR: could not seek to additional blocks\n");
+ fclose(fp);
+ return -1;
+ }
+
+ for (i = 0; i < numAdditionalBlocks; ++i) {
+ /* Get the position of the start of this block */
+ int64_t oldPos = ftello(fp);
+
+ /* Read the additional block size */
+ if (fread(&additionalBlockSize,
+ sizeof(additionalBlockSize),
+ 1, fp) != 1) {
+ fclose(fp);
+ return -1;
+ }
+ additionalBlockSize = ntohl(additionalBlockSize);
+
+ /* Read the additional block ID */
+ if (fread(&additionalBlockID,
+ sizeof(additionalBlockID),
+ 1, fp) != 1) {
+ fclose(fp);
+ return -1;
+ }
+ additionalBlockID = ntohl(additionalBlockID);
+
+ if (PRODUCT_INFO_BLOCK_ID == additionalBlockID) {
+ if (fseeko(fp, oldPos, SEEK_SET)) {
+ fprintf(stderr, "Could not seek back to Product Information Block\n");
+ fclose(fp);
+ return -1;
+ }
+
+ if (mar_concat_product_info_block(fp, NULL, infoBlock)) {
+ fprintf(stderr, "Could not concat Product Information Block\n");
+ fclose(fp);
+ return -1;
+ }
+
+ fclose(fp);
+ return 0;
+ } else {
+ /* This is not the additional block you're looking for. Move along. */
+ if (fseek(fp, additionalBlockSize, SEEK_CUR)) {
+ fprintf(stderr, "ERROR: Could not seek past current block.\n");
+ fclose(fp);
+ return -1;
+ }
+ }
+ }
+
+ /* If we had a product info block we would have already returned */
+ fclose(fp);
+ fprintf(stderr, "ERROR: Could not refresh because block does not exist\n");
+ return -1;
+}
+
+/**
+ * Create a MAR file from a set of files.
+ * @param dest The path to the file to create. This path must be
+ * compatible with fopen.
+ * @param numfiles The number of files to store in the archive.
+ * @param files The list of null-terminated file paths. Each file
+ * path must be compatible with fopen.
+ * @param infoBlock The information to store in the product information block.
+ * @return A non-zero value if an error occurs.
+ */
+int mar_create(const char *dest, int
+ num_files, char **files,
+ struct ProductInformationBlock *infoBlock) {
+ struct MarItemStack stack;
+ uint32_t offset_to_index = 0, size_of_index,
+ numSignatures, numAdditionalSections;
+ uint64_t sizeOfEntireMAR = 0;
+ struct stat st;
+ FILE *fp;
+ int i, rv = -1;
+
+ memset(&stack, 0, sizeof(stack));
+
+ fp = fopen(dest, "wb");
+ if (!fp) {
+ fprintf(stderr, "ERROR: could not create target file: %s\n", dest);
+ return -1;
+ }
+
+ if (fwrite(MAR_ID, MAR_ID_SIZE, 1, fp) != 1)
+ goto failure;
+ if (fwrite(&offset_to_index, sizeof(uint32_t), 1, fp) != 1)
+ goto failure;
+
+ stack.last_offset = MAR_ID_SIZE +
+ sizeof(offset_to_index) +
+ sizeof(numSignatures) +
+ sizeof(numAdditionalSections) +
+ sizeof(sizeOfEntireMAR);
+
+ /* We will circle back on this at the end of the MAR creation to fill it */
+ if (fwrite(&sizeOfEntireMAR, sizeof(sizeOfEntireMAR), 1, fp) != 1) {
+ goto failure;
+ }
+
+ /* Write out the number of signatures, for now only at most 1 is supported */
+ numSignatures = 0;
+ if (fwrite(&numSignatures, sizeof(numSignatures), 1, fp) != 1) {
+ goto failure;
+ }
+
+ /* Write out the number of additional sections, for now just 1
+ for the product info block */
+ numAdditionalSections = htonl(1);
+ if (fwrite(&numAdditionalSections,
+ sizeof(numAdditionalSections), 1, fp) != 1) {
+ goto failure;
+ }
+ numAdditionalSections = ntohl(numAdditionalSections);
+
+ if (mar_concat_product_info_block(fp, &stack, infoBlock)) {
+ goto failure;
+ }
+
+ for (i = 0; i < num_files; ++i) {
+ if (stat(files[i], &st)) {
+ fprintf(stderr, "ERROR: file not found: %s\n", files[i]);
+ goto failure;
+ }
+
+ if (mar_push(&stack, st.st_size, st.st_mode & 0777, files[i]))
+ goto failure;
+
+ /* concatenate input file to archive */
+ if (mar_concat_file(fp, files[i]))
+ goto failure;
+ }
+
+ /* write out the index (prefixed with length of index) */
+ size_of_index = htonl(stack.size_used);
+ if (fwrite(&size_of_index, sizeof(size_of_index), 1, fp) != 1)
+ goto failure;
+ if (fwrite(stack.head, stack.size_used, 1, fp) != 1)
+ goto failure;
+
+ /* To protect against invalid MAR files, we assume that the MAR file
+ size is less than or equal to MAX_SIZE_OF_MAR_FILE. */
+ if (ftell(fp) > MAX_SIZE_OF_MAR_FILE) {
+ goto failure;
+ }
+
+ /* write out offset to index file in network byte order */
+ offset_to_index = htonl(stack.last_offset);
+ if (fseek(fp, MAR_ID_SIZE, SEEK_SET))
+ goto failure;
+ if (fwrite(&offset_to_index, sizeof(offset_to_index), 1, fp) != 1)
+ goto failure;
+ offset_to_index = ntohl(stack.last_offset);
+
+ sizeOfEntireMAR = ((uint64_t)stack.last_offset) +
+ stack.size_used +
+ sizeof(size_of_index);
+ sizeOfEntireMAR = HOST_TO_NETWORK64(sizeOfEntireMAR);
+ if (fwrite(&sizeOfEntireMAR, sizeof(sizeOfEntireMAR), 1, fp) != 1)
+ goto failure;
+ sizeOfEntireMAR = NETWORK_TO_HOST64(sizeOfEntireMAR);
+
+ rv = 0;
+failure:
+ if (stack.head)
+ free(stack.head);
+ fclose(fp);
+ if (rv)
+ remove(dest);
+ return rv;
+}
diff --git a/onlineupdate/source/libmar/src/mar_extract.c b/onlineupdate/source/libmar/src/mar_extract.c
new file mode 100644
index 000000000..11e570242
--- /dev/null
+++ b/onlineupdate/source/libmar/src/mar_extract.c
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <onlineupdate/mar_private.h>
+#include <onlineupdate/mar.h>
+
+#ifdef _WIN32
+#include <io.h>
+#include <direct.h>
+#endif
+
+/* Ensure that the directory containing this file exists */
+static int mar_ensure_parent_dir(const char *path)
+{
+ char *slash = strrchr(path, '/');
+ if (slash)
+ {
+ *slash = '\0';
+ mar_ensure_parent_dir(path);
+#ifdef _WIN32
+ _mkdir(path);
+#else
+ mkdir(path, 0755);
+#endif
+ *slash = '/';
+ }
+ return 0;
+}
+
+static int mar_test_callback(MarFile *mar, const MarItem *item, void *unused) {
+ FILE *fp;
+ char buf[BLOCKSIZE];
+ int fd, len, offset = 0;
+
+ (void) unused; // avoid warnings
+
+ if (mar_ensure_parent_dir(item->name))
+ return -1;
+
+#ifdef _WIN32
+ fd = _open(item->name, _O_BINARY|_O_CREAT|_O_TRUNC|_O_WRONLY, item->flags);
+#else
+ fd = creat(item->name, item->flags);
+#endif
+ if (fd == -1) {
+ fprintf(stderr, "ERROR: could not create file in mar_test_callback()\n");
+ perror(item->name);
+ return -1;
+ }
+
+ fp = fdopen(fd, "wb");
+ if (!fp)
+ return -1;
+
+ while ((len = mar_read(mar, item, offset, buf, sizeof(buf))) > 0) {
+ if (fwrite(buf, len, 1, fp) != 1)
+ break;
+ offset += len;
+ }
+
+ fclose(fp);
+ return len == 0 ? 0 : -1;
+}
+
+int mar_extract(const char *path) {
+ MarFile *mar;
+ int rv;
+
+ mar = mar_open(path);
+ if (!mar)
+ return -1;
+
+ rv = mar_enum_items(mar, mar_test_callback, NULL);
+
+ mar_close(mar);
+ return rv;
+}
diff --git a/onlineupdate/source/libmar/src/mar_read.c b/onlineupdate/source/libmar/src/mar_read.c
new file mode 100644
index 000000000..2a6238ca2
--- /dev/null
+++ b/onlineupdate/source/libmar/src/mar_read.c
@@ -0,0 +1,572 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <sys/types.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <onlineupdate/mar_private.h>
+#include <onlineupdate/mar.h>
+
+#ifdef _WIN32
+#include <winsock2.h>
+#else
+#include <netinet/in.h>
+#endif
+
+
+/* this is the same hash algorithm used by nsZipArchive.cpp */
+static uint32_t mar_hash_name(const char *name) {
+ uint32_t val = 0;
+ unsigned char* c;
+
+ for (c = (unsigned char *) name; *c; ++c)
+ val = val*37 + *c;
+
+ return val % TABLESIZE;
+}
+
+static int mar_insert_item(MarFile *mar, const char *name, int namelen,
+ uint32_t offset, uint32_t length, uint32_t flags) {
+ MarItem *item, *root;
+ uint32_t hash;
+
+ item = (MarItem *) malloc(sizeof(MarItem) + namelen);
+ if (!item)
+ return -1;
+ item->next = NULL;
+ item->offset = offset;
+ item->length = length;
+ item->flags = flags;
+ memcpy(item->name, name, namelen + 1);
+
+ hash = mar_hash_name(name);
+
+ root = mar->item_table[hash];
+ if (!root) {
+ mar->item_table[hash] = item;
+ } else {
+ /* append item */
+ while (root->next)
+ root = root->next;
+ root->next = item;
+ }
+ return 0;
+}
+
+static int mar_consume_index(MarFile *mar, char **buf, const char *buf_end) {
+ /*
+ * Each item has the following structure:
+ * uint32_t offset (network byte order)
+ * uint32_t length (network byte order)
+ * uint32_t flags (network byte order)
+ * char name[N] (where N >= 1)
+ * char null_byte;
+ */
+ uint32_t offset;
+ uint32_t length;
+ uint32_t flags;
+ const char *name;
+ int namelen;
+
+ if ((buf_end - *buf) < (int)(3*sizeof(uint32_t) + 2))
+ return -1;
+
+ memcpy(&offset, *buf, sizeof(offset));
+ *buf += sizeof(offset);
+
+ memcpy(&length, *buf, sizeof(length));
+ *buf += sizeof(length);
+
+ memcpy(&flags, *buf, sizeof(flags));
+ *buf += sizeof(flags);
+
+ offset = ntohl(offset);
+ length = ntohl(length);
+ flags = ntohl(flags);
+
+ name = *buf;
+ /* find namelen; must take care not to read beyond buf_end */
+ while (**buf) {
+ if (*buf == buf_end)
+ return -1;
+ ++(*buf);
+ }
+ namelen = (*buf - name);
+ /* consume null byte */
+ if (*buf == buf_end)
+ return -1;
+ ++(*buf);
+
+ return mar_insert_item(mar, name, namelen, offset, length, flags);
+}
+
+static int mar_read_index(MarFile *mar) {
+ char id[MAR_ID_SIZE], *buf, *bufptr, *bufend;
+ uint32_t offset_to_index, size_of_index;
+
+ /* verify MAR ID */
+ if (fread(id, MAR_ID_SIZE, 1, mar->fp) != 1)
+ return -1;
+ if (memcmp(id, MAR_ID, MAR_ID_SIZE) != 0)
+ return -1;
+
+ if (fread(&offset_to_index, sizeof(uint32_t), 1, mar->fp) != 1)
+ return -1;
+ offset_to_index = ntohl(offset_to_index);
+
+ if (fseek(mar->fp, offset_to_index, SEEK_SET))
+ return -1;
+ if (fread(&size_of_index, sizeof(uint32_t), 1, mar->fp) != 1)
+ return -1;
+ size_of_index = ntohl(size_of_index);
+
+ buf = (char *) malloc(size_of_index);
+ if (!buf)
+ return -1;
+ if (fread(buf, size_of_index, 1, mar->fp) != 1) {
+ free(buf);
+ return -1;
+ }
+
+ bufptr = buf;
+ bufend = buf + size_of_index;
+ while (bufptr < bufend && mar_consume_index(mar, &bufptr, bufend) == 0);
+
+ free(buf);
+ return (bufptr == bufend) ? 0 : -1;
+}
+
+/**
+ * Internal shared code for mar_open and mar_wopen.
+ * On failure, will fclose(fp).
+ */
+static MarFile *mar_fpopen(FILE *fp)
+{
+ MarFile *mar;
+
+ mar = (MarFile *) malloc(sizeof(*mar));
+ if (!mar) {
+ fclose(fp);
+ return NULL;
+ }
+
+ mar->fp = fp;
+ memset(mar->item_table, 0, sizeof(mar->item_table));
+ if (mar_read_index(mar)) {
+ mar_close(mar);
+ return NULL;
+ }
+
+ return mar;
+}
+
+MarFile *mar_open(const char *path) {
+ FILE *fp;
+
+ fp = fopen(path, "rb");
+ if (!fp) {
+ fprintf(stderr, "ERROR: could not open file in mar_open()\n");
+ perror(path);
+ return NULL;
+ }
+
+ return mar_fpopen(fp);
+}
+
+#ifdef _WIN32
+MarFile *mar_wopen(const wchar_t *path) {
+ FILE *fp;
+
+ _wfopen_s(&fp, path, L"rb");
+ if (!fp) {
+ fprintf(stderr, "ERROR: could not open file in mar_wopen()\n");
+ _wperror(path);
+ return NULL;
+ }
+
+ return mar_fpopen(fp);
+}
+#endif
+
+void mar_close(MarFile *mar) {
+ MarItem *item;
+ int i;
+
+ fclose(mar->fp);
+
+ for (i = 0; i < TABLESIZE; ++i) {
+ item = mar->item_table[i];
+ while (item) {
+ MarItem *temp = item;
+ item = item->next;
+ free(temp);
+ }
+ }
+
+ free(mar);
+}
+
+/**
+ * Determines the MAR file information.
+ *
+ * @param fp An opened MAR file in read mode.
+ * @param hasSignatureBlock Optional out parameter specifying if the MAR
+ * file has a signature block or not.
+ * @param numSignatures Optional out parameter for storing the number
+ * of signatures in the MAR file.
+ * @param hasAdditionalBlocks Optional out parameter specifying if the MAR
+ * file has additional blocks or not.
+ * @param offsetAdditionalBlocks Optional out parameter for the offset to the
+ * first additional block. Value is only valid if
+ * hasAdditionalBlocks is not equal to 0.
+ * @param numAdditionalBlocks Optional out parameter for the number of
+ * additional blocks. Value is only valid if
+ * hasAdditionalBlocks is not equal to 0.
+ * @return 0 on success and non-zero on failure.
+ */
+int get_mar_file_info_fp(FILE *fp,
+ int *hasSignatureBlock,
+ uint32_t *numSignatures,
+ int *hasAdditionalBlocks,
+ uint32_t *offsetAdditionalBlocks,
+ uint32_t *numAdditionalBlocks)
+{
+ uint32_t offsetToIndex, offsetToContent, signatureCount, signatureLen, i;
+
+ /* One of hasSignatureBlock or hasAdditionalBlocks must be non NULL */
+ if (!hasSignatureBlock && !hasAdditionalBlocks) {
+ return -1;
+ }
+
+
+ /* Skip to the start of the offset index */
+ if (fseek(fp, MAR_ID_SIZE, SEEK_SET)) {
+ return -1;
+ }
+
+ /* Read the offset to the index. */
+ if (fread(&offsetToIndex, sizeof(offsetToIndex), 1, fp) != 1) {
+ return -1;
+ }
+ offsetToIndex = ntohl(offsetToIndex);
+
+ if (numSignatures) {
+ /* Skip past the MAR file size field */
+ if (fseek(fp, sizeof(uint64_t), SEEK_CUR)) {
+ return -1;
+ }
+
+ /* Read the number of signatures field */
+ if (fread(numSignatures, sizeof(*numSignatures), 1, fp) != 1) {
+ return -1;
+ }
+ *numSignatures = ntohl(*numSignatures);
+ }
+
+ /* Skip to the first index entry past the index size field
+ We do it in 2 calls because offsetToIndex + sizeof(uint32_t)
+ could overflow in theory. */
+ if (fseek(fp, offsetToIndex, SEEK_SET)) {
+ return -1;
+ }
+
+ if (fseek(fp, sizeof(uint32_t), SEEK_CUR)) {
+ return -1;
+ }
+
+ /* Read the first offset to content field. */
+ if (fread(&offsetToContent, sizeof(offsetToContent), 1, fp) != 1) {
+ return -1;
+ }
+ offsetToContent = ntohl(offsetToContent);
+
+ /* Check if we have a new or old MAR file */
+ if (hasSignatureBlock) {
+ if (offsetToContent == MAR_ID_SIZE + sizeof(uint32_t)) {
+ *hasSignatureBlock = 0;
+ } else {
+ *hasSignatureBlock = 1;
+ }
+ }
+
+ /* If the caller doesn't care about the product info block
+ value, then just return */
+ if (!hasAdditionalBlocks) {
+ return 0;
+ }
+
+ /* Skip to the start of the signature block */
+ if (fseeko(fp, SIGNATURE_BLOCK_OFFSET, SEEK_SET)) {
+ return -1;
+ }
+
+ /* Get the number of signatures */
+ if (fread(&signatureCount, sizeof(signatureCount), 1, fp) != 1) {
+ return -1;
+ }
+ signatureCount = ntohl(signatureCount);
+
+ /* Check that we have less than the max amount of signatures so we don't
+ waste too much of either updater's or signmar's time. */
+ if (signatureCount > MAX_SIGNATURES) {
+ return -1;
+ }
+
+ /* Skip past the whole signature block */
+ for (i = 0; i < signatureCount; i++) {
+ /* Skip past the signature algorithm ID */
+ if (fseek(fp, sizeof(uint32_t), SEEK_CUR)) {
+ return -1;
+ }
+
+ /* Read the signature length and skip past the signature */
+ if (fread(&signatureLen, sizeof(uint32_t), 1, fp) != 1) {
+ return -1;
+ }
+ signatureLen = ntohl(signatureLen);
+ if (fseek(fp, signatureLen, SEEK_CUR)) {
+ return -1;
+ }
+ }
+
+ if (ftell(fp) == (long)offsetToContent) {
+ *hasAdditionalBlocks = 0;
+ } else {
+ if (numAdditionalBlocks) {
+ /* We have an additional block, so read in the number of additional blocks
+ and set the offset. */
+ *hasAdditionalBlocks = 1;
+ if (fread(numAdditionalBlocks, sizeof(uint32_t), 1, fp) != 1) {
+ return -1;
+ }
+ *numAdditionalBlocks = ntohl(*numAdditionalBlocks);
+ if (offsetAdditionalBlocks) {
+ *offsetAdditionalBlocks = ftell(fp);
+ }
+ } else if (offsetAdditionalBlocks) {
+ /* numAdditionalBlocks is not specified but offsetAdditionalBlocks
+ is, so fill it! */
+ *offsetAdditionalBlocks = ftell(fp) + sizeof(uint32_t);
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * Reads the product info block from the MAR file's additional block section.
+ * The caller is responsible for freeing the fields in infoBlock
+ * if the return is successful.
+ *
+ * @param infoBlock Out parameter for where to store the result to
+ * @return 0 on success, -1 on failure
+*/
+int
+read_product_info_block(char *path,
+ struct ProductInformationBlock *infoBlock)
+{
+ int rv;
+ MarFile mar;
+ mar.fp = fopen(path, "rb");
+ if (!mar.fp) {
+ fprintf(stderr, "ERROR: could not open file in read_product_info_block()\n");
+ perror(path);
+ return -1;
+ }
+ rv = mar_read_product_info_block(&mar, infoBlock);
+ fclose(mar.fp);
+ return rv;
+}
+
+/**
+ * Reads the product info block from the MAR file's additional block section.
+ * The caller is responsible for freeing the fields in infoBlock
+ * if the return is successful.
+ *
+ * @param infoBlock Out parameter for where to store the result to
+ * @return 0 on success, -1 on failure
+*/
+int
+mar_read_product_info_block(MarFile *mar,
+ struct ProductInformationBlock *infoBlock)
+{
+ uint32_t i, offsetAdditionalBlocks, numAdditionalBlocks,
+ additionalBlockSize, additionalBlockID;
+ int hasAdditionalBlocks;
+
+ /* The buffer size is 97 bytes because the MAR channel name < 64 bytes, and
+ product version < 32 bytes + 3 NULL terminator bytes. */
+ char buf[97] = { '\0' };
+ int ret = get_mar_file_info_fp(mar->fp, NULL, NULL,
+ &hasAdditionalBlocks,
+ &offsetAdditionalBlocks,
+ &numAdditionalBlocks);
+ if (ret)
+ return ret;
+ for (i = 0; i < numAdditionalBlocks; ++i) {
+ /* Read the additional block size */
+ if (fread(&additionalBlockSize,
+ sizeof(additionalBlockSize),
+ 1, mar->fp) != 1) {
+ return -1;
+ }
+ additionalBlockSize = ntohl(additionalBlockSize) -
+ sizeof(additionalBlockSize) -
+ sizeof(additionalBlockID);
+
+ /* Read the additional block ID */
+ if (fread(&additionalBlockID,
+ sizeof(additionalBlockID),
+ 1, mar->fp) != 1) {
+ return -1;
+ }
+ additionalBlockID = ntohl(additionalBlockID);
+
+ if (PRODUCT_INFO_BLOCK_ID == additionalBlockID) {
+ const char *location;
+ int len;
+
+ /* This block must be at most 104 bytes.
+ MAR channel name < 64 bytes, and product version < 32 bytes + 3 NULL
+ terminator bytes. We only check for 96 though because we remove 8
+ bytes above from the additionalBlockSize: We subtract
+ sizeof(additionalBlockSize) and sizeof(additionalBlockID) */
+ if (additionalBlockSize > 96) {
+ return -1;
+ }
+
+ if (fread(buf, additionalBlockSize, 1, mar->fp) != 1) {
+ return -1;
+ }
+
+ /* Extract the MAR channel name from the buffer. For now we
+ point to the stack allocated buffer but we strdup this
+ if we are within bounds of each field's max length. */
+ location = buf;
+ len = strlen(location);
+ infoBlock->MARChannelID = location;
+ location += len + 1;
+ if (len >= 64) {
+ infoBlock->MARChannelID = NULL;
+ return -1;
+ }
+
+ /* Extract the version from the buffer */
+ len = strlen(location);
+ infoBlock->productVersion = location;
+ location += len + 1;
+ if (len >= 32) {
+ infoBlock->MARChannelID = NULL;
+ infoBlock->productVersion = NULL;
+ return -1;
+ }
+ infoBlock->MARChannelID =
+ strdup(infoBlock->MARChannelID);
+ infoBlock->productVersion =
+ strdup(infoBlock->productVersion);
+ return 0;
+ } else {
+ /* This is not the additional block you're looking for. Move along. */
+ if (fseek(mar->fp, additionalBlockSize, SEEK_CUR)) {
+ return -1;
+ }
+ }
+ }
+
+ /* If we had a product info block we would have already returned */
+ return -1;
+}
+
+const MarItem *mar_find_item(MarFile *mar, const char *name) {
+ uint32_t hash;
+ const MarItem *item;
+
+ hash = mar_hash_name(name);
+
+ item = mar->item_table[hash];
+ while (item && strcmp(item->name, name) != 0)
+ item = item->next;
+
+ return item;
+}
+
+int mar_enum_items(MarFile *mar, MarItemCallback callback, void *closure) {
+ MarItem *item;
+ int i;
+
+ for (i = 0; i < TABLESIZE; ++i) {
+ item = mar->item_table[i];
+ while (item) {
+ int rv = callback(mar, item, closure);
+ if (rv)
+ return rv;
+ item = item->next;
+ }
+ }
+
+ return 0;
+}
+
+int mar_read(MarFile *mar, const MarItem *item, int offset, char *buf,
+ int bufsize) {
+ int nr;
+
+ if (offset == (int) item->length)
+ return 0;
+ if (offset > (int) item->length)
+ return -1;
+
+ nr = item->length - offset;
+ if (nr > bufsize)
+ nr = bufsize;
+
+ if (fseek(mar->fp, item->offset + offset, SEEK_SET))
+ return -1;
+
+ return fread(buf, 1, nr, mar->fp);
+}
+
+/**
+ * Determines the MAR file information.
+ *
+ * @param path The path of the MAR file to check.
+ * @param hasSignatureBlock Optional out parameter specifying if the MAR
+ * file has a signature block or not.
+ * @param numSignatures Optional out parameter for storing the number
+ * of signatures in the MAR file.
+ * @param hasAdditionalBlocks Optional out parameter specifying if the MAR
+ * file has additional blocks or not.
+ * @param offsetAdditionalBlocks Optional out parameter for the offset to the
+ * first additional block. Value is only valid if
+ * hasAdditionalBlocks is not equal to 0.
+ * @param numAdditionalBlocks Optional out parameter for the number of
+ * additional blocks. Value is only valid if
+ * has_additional_blocks is not equal to 0.
+ * @return 0 on success and non-zero on failure.
+ */
+int get_mar_file_info(const char *path,
+ int *hasSignatureBlock,
+ uint32_t *numSignatures,
+ int *hasAdditionalBlocks,
+ uint32_t *offsetAdditionalBlocks,
+ uint32_t *numAdditionalBlocks)
+{
+ int rv;
+ FILE *fp = fopen(path, "rb");
+ if (!fp) {
+ fprintf(stderr, "ERROR: could not open file in get_mar_file_info()\n");
+ perror(path);
+ return -1;
+ }
+
+ rv = get_mar_file_info_fp(fp, hasSignatureBlock,
+ numSignatures, hasAdditionalBlocks,
+ offsetAdditionalBlocks, numAdditionalBlocks);
+
+ fclose(fp);
+ return rv;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 16:24:54 +0000