AbstractFile *openAbstractFile(AbstractFile * file)
{
uint32_t signatureBE;
uint32_t signatureLE;
if (!file)
return NULL;
file->seek(file, 0);
file->read(file, &signatureBE, sizeof(signatureBE));
signatureLE = signatureBE;
FLIPENDIAN(signatureBE);
FLIPENDIANLE(signatureLE);
file->seek(file, 0);
if (signatureBE == SIGNATURE_8900) {
return openAbstractFile(createAbstractFileFrom8900(file));
} else if (signatureLE == IMG2_SIGNATURE) {
return openAbstractFile(createAbstractFileFromImg2(file));
} else if (signatureLE == IMG3_SIGNATURE) {
return openAbstractFile(createAbstractFileFromImg3(file));
} else if (signatureBE == COMP_SIGNATURE) {
return openAbstractFile(createAbstractFileFromComp(file));
} else {
return file;
}
}
AbstractFile* duplicateAbstractFile(AbstractFile* file, AbstractFile* backing) {
uint32_t signatureBE;
uint32_t signatureLE;
AbstractFile* orig;
if (!backing) { /* imagine that: createAbstractFileFromComp() fails, because of decompress_lzss() */
return NULL;
}
file->seek(file, 0);
file->read(file, &signatureBE, sizeof(signatureBE));
signatureLE = signatureBE;
FLIPENDIAN(signatureBE);
FLIPENDIANLE(signatureLE);
file->seek(file, 0);
if(signatureLE == IMG2_SIGNATURE) {
orig = createAbstractFileFromImg2(file);
return duplicateAbstractFile(orig, duplicateImg2File(orig, backing));
} else if(signatureLE == IMG3_SIGNATURE) {
orig = createAbstractFileFromImg3(file);
return duplicateAbstractFile(orig, duplicateImg3File(orig, backing));
} else if(signatureBE == COMP_SIGNATURE) {
orig = createAbstractFileFromComp(file);
return duplicateAbstractFile(orig, duplicateCompFile(orig, backing));
} else {
file->close(file);
return backing;
}
}
AbstractFile *duplicateAbstractFile2(AbstractFile * file,
AbstractFile * backing,
const unsigned int *key,
const unsigned int *iv,
AbstractFile * certificate)
{
uint32_t signatureBE;
uint32_t signatureLE;
AbstractFile *orig;
AbstractFile *newFile;
file->seek(file, 0);
file->read(file, &signatureBE, sizeof(signatureBE));
signatureLE = signatureBE;
FLIPENDIAN(signatureBE);
FLIPENDIANLE(signatureLE);
file->seek(file, 0);
if (signatureBE == SIGNATURE_8900) {
orig = createAbstractFileFrom8900(file);
newFile = duplicate8900File(orig, backing);
if (certificate != NULL)
replaceCertificate8900(newFile, certificate);
return duplicateAbstractFile(orig, newFile);
} else if (signatureLE == IMG2_SIGNATURE) {
orig = createAbstractFileFromImg2(file);
return duplicateAbstractFile(orig,
duplicateImg2File(orig, backing));
} else if (signatureLE == IMG3_SIGNATURE) {
AbstractFile2 *newFile;
AbstractFile2 *img3;
img3 = (AbstractFile2 *) createAbstractFileFromImg3(file);
if (key != NULL)
img3->setKey(img3, key, iv);
newFile =
(AbstractFile2 *) duplicateImg3File((AbstractFile *) img3,
backing);
if (key != NULL)
img3->setKey(newFile, key, iv);
if (certificate != NULL)
replaceCertificateImg3((AbstractFile *) newFile,
certificate);
return duplicateAbstractFile((AbstractFile *) img3,
(AbstractFile *) newFile);
} else if (signatureBE == COMP_SIGNATURE) {
orig = createAbstractFileFromComp(file);
return duplicateAbstractFile(orig,
duplicateCompFile(orig, backing));
} else {
file->close(file);
return backing;
}
}
AbstractFile *openAbstractFile3(AbstractFile * file, const unsigned int *key,
const unsigned int *iv, int layers)
{
uint32_t signatureBE;
uint32_t signatureLE;
AbstractFile *cur;
if (!file)
return NULL;
file->seek(file, 0);
file->read(file, &signatureBE, sizeof(signatureBE));
signatureLE = signatureBE;
FLIPENDIAN(signatureBE);
FLIPENDIANLE(signatureLE);
file->seek(file, 0);
if (signatureBE == SIGNATURE_8900) {
cur = createAbstractFileFrom8900(file);
} else if (signatureLE == IMG2_SIGNATURE) {
cur = createAbstractFileFromImg2(file);
} else if (signatureLE == IMG3_SIGNATURE) {
AbstractFile2 *img3 =
(AbstractFile2 *) createAbstractFileFromImg3(file);
if (key && iv)
img3->setKey(img3, key, iv);
cur = (AbstractFile *) img3;
key = NULL;
iv = NULL;
} else if (signatureBE == COMP_SIGNATURE) {
cur = createAbstractFileFromComp(file);
key = NULL;
iv = NULL;
} else {
return file;
}
if (layers < 0 || layers > 0)
return openAbstractFile3(cur, key, iv, layers - 1);
else
return cur;
}