/**
* 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,
int *numSignatures,
int *hasAdditionalBlocks,
int *offsetAdditionalBlocks,
int *numAdditionalBlocks)
{
int rv;
FILE *fp = fopen(path, "rb");
if (!fp) {
return -1;
}
rv = get_mar_file_info_fp(fp, hasSignatureBlock,
numSignatures, hasAdditionalBlocks,
offsetAdditionalBlocks, numAdditionalBlocks);
fclose(fp);
return rv;
}
/**
* 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;
}
/**
* 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);
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;
}