diff options
Diffstat (limited to 'OvmfPkg/EnrollDefaultKeys')
| -rw-r--r-- | OvmfPkg/EnrollDefaultKeys/EnrollDefaultKeys.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/OvmfPkg/EnrollDefaultKeys/EnrollDefaultKeys.c b/OvmfPkg/EnrollDefaultKeys/EnrollDefaultKeys.c index e4f6a50e00..07297c631f 100644 --- a/OvmfPkg/EnrollDefaultKeys/EnrollDefaultKeys.c +++ b/OvmfPkg/EnrollDefaultKeys/EnrollDefaultKeys.c @@ -18,6 +18,7 @@ #include "EnrollDefaultKeys.h"
+
/**
Enroll a set of certificates in a global variable, overwriting it.
@@ -193,6 +194,44 @@ Out: }
+/**
+ Read a UEFI variable into a caller-allocated buffer, enforcing an exact size.
+
+ @param[in] VariableName The name of the variable to read; passed to
+ gRT->GetVariable().
+
+ @param[in] VendorGuid The vendor (namespace) GUID of the variable to read;
+ passed to gRT->GetVariable().
+
+ @param[out] Data The caller-allocated buffer that is supposed to
+ receive the variable's contents. On error, the
+ contents of Data are indeterminate.
+
+ @param[in] DataSize The size in bytes that the caller requires the UEFI
+ variable to have. The caller is responsible for
+ providing room for DataSize bytes in Data.
+
+ @param[in] AllowMissing If FALSE, the variable is required to exist. If
+ TRUE, the variable is permitted to be missing.
+
+ @retval EFI_SUCCESS The UEFI variable exists, has the required size
+ (DataSize), and has been read into Data.
+
+ @retval EFI_SUCCESS The UEFI variable doesn't exist, and
+ AllowMissing is TRUE. DataSize bytes in Data
+ have been zeroed out.
+
+ @retval EFI_NOT_FOUND The UEFI variable doesn't exist, and
+ AllowMissing is FALSE.
+
+ @retval EFI_BUFFER_TOO_SMALL The UEFI variable exists, but its size is
+ greater than DataSize.
+
+ @retval EFI_PROTOCOL_ERROR The UEFI variable exists, but its size is
+ smaller than DataSize.
+
+ @return Error codes propagated from gRT->GetVariable().
+**/
STATIC
EFI_STATUS
GetExact (
@@ -228,6 +267,31 @@ GetExact ( return EFI_SUCCESS;
}
+
+/**
+ Populate a SETTINGS structure from the underlying UEFI variables.
+
+ The following UEFI variables are standard variables:
+ - L"SetupMode" (EFI_SETUP_MODE_NAME)
+ - L"SecureBoot" (EFI_SECURE_BOOT_MODE_NAME)
+ - L"VendorKeys" (EFI_VENDOR_KEYS_VARIABLE_NAME)
+
+ The following UEFI variables are edk2 extensions:
+ - L"SecureBootEnable" (EFI_SECURE_BOOT_ENABLE_NAME)
+ - L"CustomMode" (EFI_CUSTOM_MODE_NAME)
+
+ The L"SecureBootEnable" UEFI variable is permitted to be missing, in which
+ case the corresponding field in the SETTINGS object will be zeroed out. The
+ rest of the covered UEFI variables are required to exist; otherwise, the
+ function will fail.
+
+ @param[out] Settings The SETTINGS object to fill.
+
+ @retval EFI_SUCCESS Settings has been populated.
+
+ @return Error codes propagated from the GetExact() function. The
+ contents of Settings are indeterminate.
+**/
STATIC
EFI_STATUS
GetSettings (
@@ -266,6 +330,12 @@ GetSettings ( return Status;
}
+
+/**
+ Print the contents of a SETTINGS structure to the UEFI console.
+
+ @param[in] Settings The SETTINGS object to print the contents of.
+**/
STATIC
VOID
PrintSettings (
@@ -278,6 +348,9 @@ PrintSettings ( }
+/**
+ Entry point function of this shell application.
+**/
INTN
EFIAPI
ShellAppMain (
|