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