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/** @file
PEM (Privacy Enhanced Mail) Format Handler Wrapper Implementation over MbedTLS.
Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "InternalCryptLib.h"
#include <mbedtls/pem.h>
#include <mbedtls/pk.h>
#include <mbedtls/rsa.h>
#include <mbedtls/ecp.h>
#include <mbedtls/ecdh.h>
#include <mbedtls/ecdsa.h>
/**
Retrieve the RSA Private Key from the password-protected PEM key data.
@param[in] PemData Pointer to the PEM-encoded key data to be retrieved.
@param[in] PemSize Size of the PEM key data in bytes.
@param[in] Password NULL-terminated passphrase used for encrypted PEM key data.
@param[out] RsaContext Pointer to new-generated RSA context which contain the retrieved
RSA private key component. Use RsaFree() function to free the
resource.
If PemData is NULL, then return FALSE.
If RsaContext is NULL, then return FALSE.
@retval TRUE RSA Private Key was retrieved successfully.
@retval FALSE Invalid PEM key data or incorrect password.
**/
BOOLEAN
EFIAPI
RsaGetPrivateKeyFromPem (
IN CONST UINT8 *PemData,
IN UINTN PemSize,
IN CONST CHAR8 *Password,
OUT VOID **RsaContext
)
{
INT32 Ret;
mbedtls_pk_context Pk;
mbedtls_rsa_context *Rsa;
UINT8 *NewPemData;
UINTN PasswordLen;
if ((PemData == NULL) || (RsaContext == NULL) || (PemSize > INT_MAX)) {
return FALSE;
}
NewPemData = NULL;
if (PemData[PemSize - 1] != 0) {
NewPemData = AllocateZeroPool (PemSize + 1);
if (NewPemData == NULL) {
return FALSE;
}
CopyMem (NewPemData, PemData, PemSize + 1);
NewPemData[PemSize] = 0;
PemData = NewPemData;
PemSize += 1;
}
mbedtls_pk_init (&Pk);
if (Password != NULL) {
PasswordLen = AsciiStrLen (Password);
} else {
PasswordLen = 0;
}
Ret = mbedtls_pk_parse_key (&Pk, PemData, PemSize, (CONST UINT8 *)Password, PasswordLen, NULL, NULL);
if (NewPemData != NULL) {
FreePool (NewPemData);
NewPemData = NULL;
}
if (Ret != 0) {
mbedtls_pk_free (&Pk);
return FALSE;
}
if (mbedtls_pk_get_type (&Pk) != MBEDTLS_PK_RSA) {
mbedtls_pk_free (&Pk);
return FALSE;
}
Rsa = RsaNew ();
if (Rsa == NULL) {
mbedtls_pk_free (&Pk);
return FALSE;
}
Ret = mbedtls_rsa_copy (Rsa, mbedtls_pk_rsa (Pk));
if (Ret != 0) {
RsaFree (Rsa);
mbedtls_pk_free (&Pk);
return FALSE;
}
mbedtls_pk_free (&Pk);
*RsaContext = Rsa;
return TRUE;
}
/**
Retrieve the EC Private Key from the password-protected PEM key data.
@param[in] PemData Pointer to the PEM-encoded key data to be retrieved.
@param[in] PemSize Size of the PEM key data in bytes.
@param[in] Password NULL-terminated passphrase used for encrypted PEM key data.
@param[out] EcContext Pointer to new-generated EC DSA context which contain the retrieved
EC private key component. Use EcFree() function to free the
resource.
If PemData is NULL, then return FALSE.
If EcContext is NULL, then return FALSE.
@retval TRUE EC Private Key was retrieved successfully.
@retval FALSE Invalid PEM key data or incorrect password.
**/
BOOLEAN
EFIAPI
EcGetPrivateKeyFromPem (
IN CONST UINT8 *PemData,
IN UINTN PemSize,
IN CONST CHAR8 *Password,
OUT VOID **EcContext
)
{
ASSERT (FALSE);
return FALSE;
}
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