CryptRsaPss.c File Reference

#include "InternalCryptLib.h"
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/objects.h>
#include <openssl/evp.h>

Go to the source code of this file.

Functions
STATIC const EVP_MD *	GetEvpMD (IN UINT16 DigestLen)
BOOLEAN EFIAPI	RsaPssVerify (IN VOID *RsaContext, IN CONST UINT8 *Message, IN UINTN MsgSize, IN CONST UINT8 *Signature, IN UINTN SigSize, IN UINT16 DigestLen, IN UINT16 SaltLen)

Detailed Description

RSA Asymmetric Cipher Wrapper Implementation over OpenSSL.

This file implements following APIs which provide basic capabilities for RSA: 1) RsaPssVerify

Copyright (c) 2021, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CryptRsaPss.c.

Function Documentation

GetEvpMD()

STATIC const EVP_MD * GetEvpMD

(

IN UINT16

DigestLen

)

Retrieve a pointer to EVP message digest object.

Parameters

[in]

DigestLen

Length of the message digest.

Definition at line 28 of file CryptRsaPss.c.

RsaPssVerify()

BOOLEAN EFIAPI RsaPssVerify	(	IN VOID *	RsaContext,
		IN CONST UINT8 *	Message,
		IN UINTN	MsgSize,
		IN CONST UINT8 *	Signature,
		IN UINTN	SigSize,
		IN UINT16	DigestLen,
		IN UINT16	SaltLen
	)

Verifies the RSA signature with RSASSA-PSS signature scheme defined in RFC 8017. Implementation determines salt length automatically from the signature encoding. Mask generation function is the same as the message digest algorithm. Salt length should be equal to digest length.

Parameters

[in]	RsaContext	Pointer to RSA context for signature verification.
[in]	Message	Pointer to octet message to be verified.
[in]	MsgSize	Size of the message in bytes.
[in]	Signature	Pointer to RSASSA-PSS signature to be verified.
[in]	SigSize	Size of signature in bytes.
[in]	DigestLen	Length of digest for RSA operation.
[in]	SaltLen	Salt length for PSS encoding.

Return values

TRUE	Valid signature encoded in RSASSA-PSS.
FALSE	Invalid signature or invalid RSA context.

Definition at line 67 of file CryptRsaPss.c.