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TCRYPT: move all header handling into library.

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Add warning about unsupported modes.
This commit is contained in:
Milan Broz
2012-11-23 13:01:43 +01:00
parent 0996a43dbb
commit 52cbbdaf38
3 changed files with 37 additions and 10 deletions
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26
lib/tcrypt/tcrypt.c
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@@ -519,6 +519,17 @@ int TCRYPT_activate(struct crypt_device *cd,
}
};
if (!hdr->d.version) {
log_dbg("TCRYPT: this function is not supported without encrypted header load.");
return -ENOTSUP;
}
if (hdr->d.sector_size && hdr->d.sector_size != SECTOR_SIZE) {
log_err(cd, _("Activation is not supported for %d sector size.\n"),
hdr->d.sector_size);
return -ENOTSUP;
}
if (strstr(params->mode, "-tcrypt")) {
log_err(cd, _("Kernel doesn't support activation for this TCRYPT legacy mode.\n"));
return -ENOTSUP;
@@ -698,3 +709,18 @@ int TCRYPT_init_by_name(struct crypt_device *cd, const char *name,
tcrypt_params->cipher = strdup(cipher);
return 0;
}
uint64_t TCRYPT_get_data_offset(struct tcrypt_phdr *hdr)
{
// FIXME: system vol.
if (!hdr->d.mk_offset)
return 1;
return (hdr->d.mk_offset / hdr->d.sector_size);
}
uint64_t TCRYPT_get_iv_offset(struct tcrypt_phdr *hdr)
{
if (!hdr->d.mk_offset)
return 0;
return (hdr->d.mk_offset / hdr->d.sector_size);
}