diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLibNull/Pk/CryptPkcs7VerifyEkuNull.c')
| -rw-r--r-- | src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLibNull/Pk/CryptPkcs7VerifyEkuNull.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLibNull/Pk/CryptPkcs7VerifyEkuNull.c b/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLibNull/Pk/CryptPkcs7VerifyEkuNull.c new file mode 100644 index 00000000..db1692e6 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/CryptoPkg/Library/BaseCryptLibNull/Pk/CryptPkcs7VerifyEkuNull.c @@ -0,0 +1,156 @@ +/** @file + PKCS7 Verify Null implementation. + + Copyright (C) Microsoft Corporation. All Rights Reserved. + Copyright (c) 2019, Intel Corporation. All rights reserved.<BR> + + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "InternalCryptLib.h" + +/** + This function will return the leaf signer certificate in a chain. This is + required because certificate chains are not guaranteed to have the + certificates in the order that they were issued. + + A typical certificate chain looks like this: + + + ---------------------------- + | Root | + ---------------------------- + ^ + | + ---------------------------- + | Policy CA | <-- Typical Trust Anchor. + ---------------------------- + ^ + | + ---------------------------- + | Issuing CA | + ---------------------------- + ^ + | + ----------------------------- + / End-Entity (leaf) signer / <-- Bottom certificate. + ----------------------------- EKU: "1.3.6.1.4.1.311.76.9.21.1" + (Firmware Signing) + + + @param[in] CertChain Certificate chain. + + @param[out] SignerCert Last certificate in the chain. For PKCS7 signatures, + this will be the end-entity (leaf) signer cert. + + @retval EFI_SUCCESS The required EKUs were found in the signature. + @retval EFI_INVALID_PARAMETER A parameter was invalid. + @retval EFI_NOT_FOUND The number of signers found was not 1. + +**/ +EFI_STATUS +GetSignerCertificate ( + IN CONST VOID *CertChain, + OUT VOID **SignerCert + ) +{ + ASSERT(FALSE); + return EFI_NOT_READY; + +} + + +/** + Determines if the specified EKU represented in ASN1 form is present + in a given certificate. + + @param[in] Cert The certificate to check. + + @param[in] Asn1ToFind The EKU to look for. + + @retval EFI_SUCCESS We successfully identified the signing type. + @retval EFI_INVALID_PARAMETER A parameter was invalid. + @retval EFI_NOT_FOUND One or more EKU's were not found in the signature. + +**/ +EFI_STATUS +IsEkuInCertificate ( + IN CONST VOID *Cert, + IN VOID *Asn1ToFind + ) +{ + ASSERT(FALSE); + return EFI_NOT_READY; +} + + +/** + Determines if the specified EKUs are present in a signing certificate. + + @param[in] SignerCert The certificate to check. + @param[in] RequiredEKUs The EKUs to look for. + @param[in] RequiredEKUsSize The number of EKUs + @param[in] RequireAllPresent If TRUE, then all the specified EKUs + must be present in the certificate. + + @retval EFI_SUCCESS We successfully identified the signing type. + @retval EFI_INVALID_PARAMETER A parameter was invalid. + @retval EFI_NOT_FOUND One or more EKU's were not found in the signature. +**/ +EFI_STATUS +CheckEKUs( + IN CONST VOID *SignerCert, + IN CONST CHAR8 *RequiredEKUs[], + IN CONST UINT32 RequiredEKUsSize, + IN BOOLEAN RequireAllPresent + ) +{ + ASSERT(FALSE); + return EFI_NOT_READY; +} + +/** + This function receives a PKCS#7 formatted signature blob, + looks for the EKU SEQUENCE blob, and if found then looks + for all the required EKUs. This function was created so that + the Surface team can cut down on the number of Certificate + Authorities (CA's) by checking EKU's on leaf signers for + a specific product. This prevents one product's certificate + from signing another product's firmware or unlock blobs. + + Note that this function does not validate the certificate chain. + That needs to be done before using this function. + + @param[in] Pkcs7Signature The PKCS#7 signed information content block. An array + containing the content block with both the signature, + the signer's certificate, and any necessary intermediate + certificates. + @param[in] Pkcs7SignatureSize Number of bytes in Pkcs7Signature. + @param[in] RequiredEKUs Array of null-terminated strings listing OIDs of + required EKUs that must be present in the signature. + @param[in] RequiredEKUsSize Number of elements in the RequiredEKUs string array. + @param[in] RequireAllPresent If this is TRUE, then all of the specified EKU's + must be present in the leaf signer. If it is + FALSE, then we will succeed if we find any + of the specified EKU's. + + @retval EFI_SUCCESS The required EKUs were found in the signature. + @retval EFI_INVALID_PARAMETER A parameter was invalid. + @retval EFI_NOT_FOUND One or more EKU's were not found in the signature. + +**/ +EFI_STATUS +EFIAPI +VerifyEKUsInPkcs7Signature ( + IN CONST UINT8 *Pkcs7Signature, + IN CONST UINT32 SignatureSize, + IN CONST CHAR8 *RequiredEKUs[], + IN CONST UINT32 RequiredEKUsSize, + IN BOOLEAN RequireAllPresent + ) +{ + ASSERT(FALSE); + return EFI_NOT_READY; +} + |