pkcs7_decrypt.c File Reference

PKCS #7 message decryption. More...

#include "core/crypto.h"
#include "pkcs7/pkcs7_parse.h"
#include "pkcs7/pkcs7_decrypt.h"
#include "cipher/cipher_algorithms.h"
#include "cipher_modes/cbc.h"
#include "encoding/oid.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Functions
error_t	pkcs7DecryptEnvelopedData (const Pkcs7EnvelopedData *envelopedData, const X509CertInfo *recipientCertInfo, const void *recipientPrivateKey, uint8_t *plaintext, size_t *plaintextLen)
	Decrypt enveloped-data content. More...
error_t	pkcs7DecryptKey (const Pkcs7RecipientInfo *recipientInfo, const void *recipientPrivateKey, uint8_t *plaintext, size_t *plaintextLen)
	Perform key decryption. More...
error_t	pkcs7DecryptData (const Pkcs7EncryptedContentInfo *encryptedContentInfo, const uint8_t *key, size_t keyLen, uint8_t *plaintext, size_t *plaintextLen)
	Perform data decryption. More...
error_t	pkcs7FindRecipient (const Pkcs7RecipientInfos *recipientInfos, const X509CertInfo *recipientCertInfo, Pkcs7RecipientInfo *recipientInfo)
	Search a list of per-recipient informations for a given recipient. More...

Detailed Description

PKCS #7 message decryption.

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2025 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneCRYPTO Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.5.2

Definition in file pkcs7_decrypt.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   CRYPTO_TRACE_LEVEL

Definition at line 32 of file pkcs7_decrypt.c.

Function Documentation

pkcs7DecryptData()

error_t pkcs7DecryptData	(	const Pkcs7EncryptedContentInfo *	encryptedContentInfo,
		const uint8_t *	key,
		size_t	keyLen,
		uint8_t *	plaintext,
		size_t *	plaintextLen
	)

Perform data decryption.

Parameters

[in]	encryptedContentInfo	Pointer to the encryptedContentInfo structure
[in]	key	Pointer to the encryption key
[in]	keyLen	Length of the encryption key, in bytes
[out]	plaintext	Plaintext resulting from the decryption operation
[out]	plaintextLen	Length of the resulting plaintext

Returns

Error code

Definition at line 138 of file pkcs7_decrypt.c.

pkcs7DecryptEnvelopedData()

error_t pkcs7DecryptEnvelopedData	(	const Pkcs7EnvelopedData *	envelopedData,
		const X509CertInfo *	recipientCertInfo,
		const void *	recipientPrivateKey,
		uint8_t *	plaintext,
		size_t *	plaintextLen
	)

Decrypt enveloped-data content.

Parameters

[in]	envelopedData	Pointer to the enveloped-data content
[in]	recipientCertInfo	Recipient's certificate
[in]	recipientPrivateKey	Recipient's private key
[out]	plaintext	Plaintext resulting from the decryption operation
[out]	plaintextLen	Length of the resulting plaintext

Returns

Error code

Definition at line 57 of file pkcs7_decrypt.c.

pkcs7DecryptKey()

error_t pkcs7DecryptKey	(	const Pkcs7RecipientInfo *	recipientInfo,
		const void *	recipientPrivateKey,
		uint8_t *	plaintext,
		size_t *	plaintextLen
	)

Perform key decryption.

Parameters

[in]	recipientInfo	Pointer to the RecipientInfo structure
[in]	recipientPrivateKey	Recipient's private key
[out]	plaintext	Key resulting from the decryption operation
[out]	plaintextLen	Length of the resulting key

Returns

Error code

Definition at line 100 of file pkcs7_decrypt.c.

pkcs7FindRecipient()

error_t pkcs7FindRecipient	(	const Pkcs7RecipientInfos *	recipientInfos,
		const X509CertInfo *	recipientCertInfo,
		Pkcs7RecipientInfo *	recipientInfo
	)

Search a list of per-recipient informations for a given recipient.

Parameters

[in]	recipientInfos	Pointer to the collection of per-recipient information
[in]	recipientCertInfo	Recipient's certificate
[out]	recipientInfo	Pointer to the matching RecipientInfo structure, if any

Returns

Error code

Definition at line 230 of file pkcs7_decrypt.c.