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Implement support for reading file format header version 2.

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This commit is contained in:
Natalia Portillo
2025-08-02 20:23:32 +01:00
parent 9a5a994702
commit b504c8392d
10 changed files with 71 additions and 46 deletions
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10
include/aaruformat/consts.h
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@@ -30,7 +30,15 @@
#define AARU_MAGIC 0x544D524655524141
/** Image format version. A change in this number indicates an incompatible change to the format that prevents older
* implementations from reading it correctly, if at all. */
#define AARUF_VERSION 1
#define AARUF_VERSION 2
/** First version of AaruFormat, created in C#.
* CRC64 was byte-swapped
*/
#define AARUF_VERSION_V1 1
/** Second version of AaruFormat, created in C.
* Introduced new header, many new features, and blocks.
*/
#define AARUF_VERSION_V2 2
/** Maximum read cache size, 512MiB. */
#define MAX_CACHE_SIZE 536870912
/** Size in bytes of LZMA properties. */

8
include/aaruformat/context.h
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@@ -34,13 +34,15 @@
#define SHA256_DIGEST_LENGTH 32
#endif
typedef struct Crc64Context {
typedef struct Crc64Context
{
uint64_t finalSeed;
uint64_t table[256];
uint64_t hashInt;
} Crc64Context;
typedef struct CdEccContext {
typedef struct CdEccContext
{
bool initedEdc;
uint8_t *eccBTable;
uint8_t *eccFTable;
@@ -73,7 +75,7 @@ typedef struct aaruformatContext
uint8_t libraryMajorVersion;
uint8_t libraryMinorVersion;
FILE *imageStream;
AaruHeader header;
AaruHeaderV2 header;
uint8_t *sectorPrefix;
uint8_t *sectorPrefixCorrected;
uint8_t *sectorSuffix;

2
src/blocks/data.c
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@@ -219,7 +219,7 @@ int32_t process_data_block(aaruformatContext *ctx, IndexEntry *entry)
crc64 = aaruf_crc64_data(data, blockHeader.length);
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != blockHeader.crc64)
{

2
src/blocks/dump.c
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@@ -79,7 +79,7 @@ void process_dumphw_block(aaruformatContext *ctx, const IndexEntry *entry)
crc64 = aaruf_crc64_data(data, ctx->dumpHardwareHeader.length);
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != ctx->dumpHardwareHeader.crc64)
{

2
src/blocks/optical.c
View File

@@ -87,7 +87,7 @@ void process_tracks_block(aaruformatContext *ctx, const IndexEntry *entry)
crc64 = aaruf_crc64_data((const uint8_t *)ctx->trackEntries, ctx->tracksHeader.entries * sizeof(TrackEntry));
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != ctx->tracksHeader.crc64)
{

2
src/index/index_v1.c
View File

@@ -107,7 +107,7 @@ int32_t verify_index_v1(aaruformatContext *ctx)
crc64 = aaruf_crc64_data((const uint8_t *)index_entries, sizeof(IndexEntry) * index_header.entries);
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != index_header.crc64)
{

2
src/index/index_v2.c
View File

@@ -107,7 +107,7 @@ int32_t verify_index_v2(aaruformatContext *ctx)
crc64 = aaruf_crc64_data((const uint8_t *)index_entries, sizeof(IndexEntry) * index_header.entries);
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != index_header.crc64)
{

15
src/open.c
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@@ -76,6 +76,21 @@ void *aaruf_open(const char *filepath)
return NULL;
}
// Read new header version
if(ctx->header.imageMajorVersion >= AARUF_VERSION_V2)
{
fseek(ctx->imageStream, 0, SEEK_SET);
readBytes = fread(&ctx->header, 1, sizeof(AaruHeaderV2), ctx->imageStream);
if(readBytes != sizeof(AaruHeaderV2))
{
free(ctx);
errno = AARUF_ERROR_FILE_TOO_SMALL;
return NULL;
}
}
if(ctx->header.imageMajorVersion > AARUF_VERSION)
{
free(ctx);

6
src/verify.c
View File

@@ -137,7 +137,7 @@ int32_t aaruf_verify_image(void *context)
aaruf_crc64_final(crc64_context, &crc64);
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != block_header.cmpCrc64)
{
@@ -180,7 +180,7 @@ int32_t aaruf_verify_image(void *context)
aaruf_crc64_final(crc64_context, &crc64);
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != ddt_header.cmpCrc64)
{
@@ -214,7 +214,7 @@ int32_t aaruf_verify_image(void *context)
aaruf_crc64_final(crc64_context, &crc64);
// Due to how C# wrote it, it is effectively reversed
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
if(crc64 != tracks_header.crc64)
{

2
tool/info.c
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@@ -59,7 +59,7 @@ int info(char *path)
printf("\tApplication version: %d.%d\n", ctx->header.applicationMajorVersion, ctx->header.applicationMinorVersion);
printf("\tImage format version: %d.%d\n", ctx->header.imageMajorVersion, ctx->header.imageMinorVersion);
printf("\tMedia type: %d\n", ctx->header.mediaType);
printf("\tMedia type: %u\n", ctx->header.mediaType);
printf("\tIndex offset: %llu\n", ctx->header.indexOffset);
printf("\tCreation time: %lld\n", ctx->header.creationTime);
printf("\tLast written time: %lld\n", ctx->header.lastWrittenTime);