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/** @file
EFI_PKCS7_VERIFY_PROTOCOL as defined in UEFI 2.5.
The EFI_PKCS7_VERIFY_PROTOCOL is used to verify data signed using PKCS#7
formatted authentication. The PKCS#7 data to be verified must be binary
DER encoded.
PKCS#7 is a general-purpose cryptographic standard (defined by RFC2315,
available at http://tools.ietf.org/html/rfc2315).
Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __EFI_PKCS7_VERIFY_PROTOCOL_H__
#define __EFI_PKCS7_VERIFY_PROTOCOL_H__
#include <Guid/ImageAuthentication.h>
///
/// Global ID for the PKCS7 Verification Protocol
///
#define EFI_PKCS7_VERIFY_PROTOCOL_GUID \
{ \
0x47889fb2, 0xd671, 0x4fab, {0xa0, 0xca, 0xdf, 0x0e, 0x44, 0xdf, 0x70, 0xd6 } \
}
typedef struct _EFI_PKCS7_VERIFY_PROTOCOL EFI_PKCS7_VERIFY_PROTOCOL;
/**
Processes a buffer containing binary DER-encoded PKCS7 signature.
The signed data content may be embedded within the buffer or separated. Funtion
verifies the signature of the content is valid and signing certificate was not
revoked and is contained within a list of trusted signers.
@param[in] This Pointer to EFI_PKCS7_VERIFY_PROTOCOL instance.
@param[in] SignedData Points to buffer containing ASN.1 DER-encoded PKCS7
signature.
@param[in] SignedDataSize The size of SignedData buffer in bytes.
@param[in] InData In case of detached signature, InData points to
buffer containing the raw message data previously
signed and to be verified by function. In case of
SignedData containing embedded data, InData must be
NULL.
@param[in] InDataSize When InData is used, the size of InData buffer in
bytes. When InData is NULL. This parameter must be
0.
@param[in] AllowedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST
structures. The list is terminated by a null
pointer. The EFI_SIGNATURE_LIST structures contain
lists of X.509 certificates of approved signers.
Function recognizes signer certificates of type
EFI_CERT_X509_GUID. Any hash certificate in AllowedDb
list is ignored by this function. Function returns
success if signer of the buffer is within this list
(and not within RevokedDb). This parameter is
required.
@param[in] RevokedDb Optional pointer to a list of pointers to
EFI_SIGNATURE_LIST structures. The list is terminated
by a null pointer. List of X.509 certificates of
revoked signers and revoked file hashes. Except as
noted in description of TimeStampDb signature
verification will always fail if the signer of the
file or the hash of the data component of the buffer
is in RevokedDb list. This list is optional and
caller may pass Null or pointer to NULL if not
required.
@param[in] TimeStampDb Optional pointer to a list of pointers to
EFI_SIGNATURE_LIST structures. The list is terminated
by a null pointer. This parameter can be used to pass
a list of X.509 certificates of trusted time stamp
signers. This list is optional and caller must pass
Null or pointer to NULL if not required.
@param[out] Content On input, points to an optional caller-allocated
buffer into which the function will copy the content
portion of the file after verification succeeds.
This parameter is optional and if NULL, no copy of
content from file is performed.
@param[in,out] ContentSize On input, points to the size in bytes of the optional
buffer Content previously allocated by caller. On
output, if the verification succeeds, the value
referenced by ContentSize will contain the actual
size of the content from signed file. If ContentSize
indicates the caller-allocated buffer is too small
to contain content, an error is returned, and
ContentSize will be updated with the required size.
This parameter must be 0 if Content is Null.
@retval EFI_SUCCESS Content signature was verified against hash of
content, the signer's certificate was not found in
RevokedDb, and was found in AllowedDb or if in signer
is found in both AllowedDb and RevokedDb, the
signing was allowed by reference to TimeStampDb as
described above, and no hash matching content hash
was found in RevokedDb.
@retval EFI_SECURITY_VIOLATION The SignedData buffer was correctly formatted but
signer was in RevokedDb or not in AllowedDb. Also
returned if matching content hash found in RevokedDb.
@retval EFI_COMPROMISED_DATA Calculated hash differs from signed hash.
@retval EFI_INVALID_PARAMETER SignedData is NULL or SignedDataSize is zero.
AllowedDb is NULL.
@retval EFI_INVALID_PARAMETER Content is not NULL and ContentSize is NULL.
@retval EFI_ABORTED Unsupported or invalid format in TimeStampDb,
RevokedDb or AllowedDb list contents was detected.
@retval EFI_NOT_FOUND Content not found because InData is NULL and no
content embedded in SignedData.
@retval EFI_UNSUPPORTED The SignedData buffer was not correctly formatted
for processing by the function.
@retval EFI_UNSUPPORTED Signed data embedded in SignedData but InData is not
NULL.
@retval EFI_BUFFER_TOO_SMALL The size of buffer indicated by ContentSize is too
small to hold the content. ContentSize updated to
required size.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PKCS7_VERIFY_BUFFER)(
IN EFI_PKCS7_VERIFY_PROTOCOL *This,
IN VOID *SignedData,
IN UINTN SignedDataSize,
IN VOID *InData OPTIONAL,
IN UINTN InDataSize,
IN EFI_SIGNATURE_LIST **AllowedDb,
IN EFI_SIGNATURE_LIST **RevokedDb OPTIONAL,
IN EFI_SIGNATURE_LIST **TimeStampDb OPTIONAL,
OUT VOID *Content OPTIONAL,
IN OUT UINTN *ContentSize
);
/**
Processes a buffer containing binary DER-encoded detached PKCS7 signature.
The hash of the signed data content is calculated and passed by the caller. Function
verifies the signature of the content is valid and signing certificate was not revoked
and is contained within a list of trusted signers.
Note: because this function uses hashes and the specification contains a variety of
hash choices, you should be aware that the check against the RevokedDb list
will improperly succeed if the signature is revoked using a different hash
algorithm. For this reason, you should either cycle through all UEFI supported
hashes to see if one is forbidden, or rely on a single hash choice only if the
UEFI signature authority only signs and revokes with a single hash (at time
of writing, this hash choice is SHA256).
@param[in] This Pointer to EFI_PKCS7_VERIFY_PROTOCOL instance.
@param[in] Signature Points to buffer containing ASN.1 DER-encoded PKCS
detached signature.
@param[in] SignatureSize The size of Signature buffer in bytes.
@param[in] InHash InHash points to buffer containing the caller
calculated hash of the data. The parameter may not
be NULL.
@param[in] InHashSize The size in bytes of InHash buffer.
@param[in] AllowedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST
structures. The list is terminated by a null
pointer. The EFI_SIGNATURE_LIST structures contain
lists of X.509 certificates of approved signers.
Function recognizes signer certificates of type
EFI_CERT_X509_GUID. Any hash certificate in AllowedDb
list is ignored by this function. Function returns
success if signer of the buffer is within this list
(and not within RevokedDb). This parameter is
required.
@param[in] RevokedDb Optional pointer to a list of pointers to
EFI_SIGNATURE_LIST structures. The list is terminated
by a null pointer. List of X.509 certificates of
revoked signers and revoked file hashes. Signature
verification will always fail if the signer of the
file or the hash of the data component of the buffer
is in RevokedDb list. This parameter is optional
and caller may pass Null if not required.
@param[in] TimeStampDb Optional pointer to a list of pointers to
EFI_SIGNATURE_LIST structures. The list is terminated
by a null pointer. This parameter can be used to pass
a list of X.509 certificates of trusted time stamp
counter-signers.
@retval EFI_SUCCESS Signed hash was verified against caller-provided
hash of content, the signer's certificate was not
found in RevokedDb, and was found in AllowedDb or
if in signer is found in both AllowedDb and
RevokedDb, the signing was allowed by reference to
TimeStampDb as described above, and no hash matching
content hash was found in RevokedDb.
@retval EFI_SECURITY_VIOLATION The SignedData buffer was correctly formatted but
signer was in RevokedDb or not in AllowedDb. Also
returned if matching content hash found in RevokedDb.
@retval EFI_COMPROMISED_DATA Caller provided hash differs from signed hash. Or,
caller and encrypted hash are different sizes.
@retval EFI_INVALID_PARAMETER Signature is NULL or SignatureSize is zero. InHash
is NULL or InHashSize is zero. AllowedDb is NULL.
@retval EFI_ABORTED Unsupported or invalid format in TimeStampDb,
RevokedDb or AllowedDb list contents was detected.
@retval EFI_UNSUPPORTED The Signature buffer was not correctly formatted
for processing by the function.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_PKCS7_VERIFY_SIGNATURE)(
IN EFI_PKCS7_VERIFY_PROTOCOL *This,
IN VOID *Signature,
IN UINTN SignatureSize,
IN VOID *InHash,
IN UINTN InHashSize,
IN EFI_SIGNATURE_LIST **AllowedDb,
IN EFI_SIGNATURE_LIST **RevokedDb OPTIONAL,
IN EFI_SIGNATURE_LIST **TimeStampDb OPTIONAL
);
///
/// The EFI_PKCS7_VERIFY_PROTOCOL is used to verify data signed using PKCS7
/// structure. The PKCS7 data to be verified must be ASN.1 (DER) encoded.
/// SHA256 must be supported as digest algorithm with RSA digest encryption.
/// Support of other hash algorithms is optional.
///
struct _EFI_PKCS7_VERIFY_PROTOCOL {
EFI_PKCS7_VERIFY_BUFFER VerifyBuffer;
EFI_PKCS7_VERIFY_SIGNATURE VerifySignature;
};
extern EFI_GUID gEfiPkcs7VerifyProtocolGuid;
#endif
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