mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2025-03-29 04:20:12 +00:00
255db80910
* Prevent pkcs12_pbe encryption when PKCS7 padding has been
disabled since this not part of the specs.
* Allow decryption when PKCS7 padding is disabled for legacy
reasons, However, invalid padding is not checked.
* Document new behaviour, known limitations and possible
security concerns.
* Add tests to check these scenarios. Test data has been
generated by the below code using OpenSSL as a reference:
#include <openssl/pkcs12.h>
#include <openssl/evp.h>
#include <openssl/des.h>
#include <openssl/asn1.h>
#include "crypto/asn1.h"
#include <string.h>
int main()
{
char pass[] = "\xBB\xBB\xBB\xBB\xBB\xBB\xBB\xBB\xBB";
unsigned char salt[] = "\xCC\xCC\xCC\xCC\xCC\xCC\xCC\xCC\xCC";
unsigned char plaintext[] = "\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA";
unsigned char *ciphertext = NULL;
int iter = 10;
X509_ALGOR *alg = X509_ALGOR_new();
int ciphertext_len = 0;
int alg_nid = NID_pbe_WithSHA1And3_Key_TripleDES_CBC;
alg->parameter = ASN1_TYPE_new();
struct asn1_object_st * aobj;
PKCS5_pbe_set0_algor(alg, alg_nid, iter,
salt, sizeof(salt)-1);
aobj = alg->algorithm;
printf("\"30%.2X", 2 + aobj->length + alg->parameter->value.asn1_string->length);
printf("06%.2X", aobj->length);
for (int i = 0; i < aobj->length; i++) {
printf("%.2X", aobj->data[i]);
}
for (int i = 0; i < alg->parameter->value.asn1_string->length; i++) {
printf("%.2X", alg->parameter->value.asn1_string->data[i]);
}
printf("\":\"");
for (int i = 0; i < sizeof(pass)-1; i++) {
printf("%.2X", pass[i] & 0xFF);
}
printf("\":\"");
for (int i = 0; i < sizeof(plaintext)-1; i++) {
printf("%.2X", plaintext[i]);
}
printf("\":");
printf("0");
printf(":\"");
unsigned char * res = PKCS12_pbe_crypt(alg, pass, sizeof(pass)-1, plaintext, sizeof(plaintext)-1, &ciphertext, &ciphertext_len, 1);
if (res == NULL)
printf("Encryption failed!\n");
for (int i = 0; i < ciphertext_len; i++) {
printf("%.2X", res[i]);
}
printf("\"\n");
return 0;
}
Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
#
141 lines
6.0 KiB
C
141 lines
6.0 KiB
C
/**
|
|
* \file pkcs12.h
|
|
*
|
|
* \brief PKCS#12 Personal Information Exchange Syntax
|
|
*/
|
|
/*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
#ifndef MBEDTLS_PKCS12_H
|
|
#define MBEDTLS_PKCS12_H
|
|
|
|
#include "mbedtls/build_info.h"
|
|
|
|
#include "mbedtls/md.h"
|
|
#include "mbedtls/cipher.h"
|
|
#include "mbedtls/asn1.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
/** Bad input parameters to function. */
|
|
#define MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA -0x1F80
|
|
/** Feature not available, e.g. unsupported encryption scheme. */
|
|
#define MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE -0x1F00
|
|
/** PBE ASN.1 data not as expected. */
|
|
#define MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT -0x1E80
|
|
/** Given private key password does not allow for correct decryption. */
|
|
#define MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH -0x1E00
|
|
|
|
#define MBEDTLS_PKCS12_DERIVE_KEY 1 /**< encryption/decryption key */
|
|
#define MBEDTLS_PKCS12_DERIVE_IV 2 /**< initialization vector */
|
|
#define MBEDTLS_PKCS12_DERIVE_MAC_KEY 3 /**< integrity / MAC key */
|
|
|
|
#define MBEDTLS_PKCS12_PBE_DECRYPT 0
|
|
#define MBEDTLS_PKCS12_PBE_ENCRYPT 1
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if defined(MBEDTLS_ASN1_PARSE_C)
|
|
|
|
/**
|
|
* \brief PKCS12 Password Based function (encryption / decryption)
|
|
* for cipher-based and mbedtls_md-based PBE's
|
|
*
|
|
* \note When encrypting, #MBEDTLS_CIPHER_PADDING_PKCS7 must
|
|
* be enabled at compile time.
|
|
*
|
|
* \warning When decrypting:
|
|
* - if #MBEDTLS_CIPHER_PADDING_PKCS7 is enabled at compile
|
|
* time, this function validates the CBC padding and returns
|
|
* #MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH if the padding is
|
|
* invalid. Note that this can help active adversaries
|
|
* attempting to brute-forcing the password. Note also that
|
|
* there is no guarantee that an invalid password will be
|
|
* detected (the chances of a valid padding with a random
|
|
* password are about 1/255).
|
|
* - if #MBEDTLS_CIPHER_PADDING_PKCS7 is disabled at compile
|
|
* time, this function does not validate the CBC padding.
|
|
*
|
|
* \param pbe_params an ASN1 buffer containing the pkcs-12 PbeParams structure
|
|
* \param mode either #MBEDTLS_PKCS12_PBE_ENCRYPT or
|
|
* #MBEDTLS_PKCS12_PBE_DECRYPT
|
|
* \param cipher_type the cipher used
|
|
* \param md_type the mbedtls_md used
|
|
* \param pwd Latin1-encoded password used. This may only be \c NULL when
|
|
* \p pwdlen is 0. No null terminator should be used.
|
|
* \param pwdlen length of the password (may be 0)
|
|
* \param input the input data
|
|
* \param len data length
|
|
* \param output Output buffer.
|
|
* On success, it contains the encrypted or decrypted data,
|
|
* possibly followed by the CBC padding.
|
|
* On failure, the content is indeterminate.
|
|
* For decryption, there must be enough room for \p len
|
|
* bytes.
|
|
* For encryption, there must be enough room for
|
|
* \p len + 1 bytes, rounded up to the block size of
|
|
* the block cipher identified by \p pbe_params.
|
|
*
|
|
* \return 0 if successful, or a MBEDTLS_ERR_XXX code
|
|
*/
|
|
int mbedtls_pkcs12_pbe(mbedtls_asn1_buf *pbe_params, int mode,
|
|
mbedtls_cipher_type_t cipher_type, mbedtls_md_type_t md_type,
|
|
const unsigned char *pwd, size_t pwdlen,
|
|
const unsigned char *input, size_t len,
|
|
unsigned char *output);
|
|
|
|
#endif /* MBEDTLS_ASN1_PARSE_C */
|
|
|
|
/**
|
|
* \brief The PKCS#12 derivation function uses a password and a salt
|
|
* to produce pseudo-random bits for a particular "purpose".
|
|
*
|
|
* Depending on the given id, this function can produce an
|
|
* encryption/decryption key, an initialization vector or an
|
|
* integrity key.
|
|
*
|
|
* \param data buffer to store the derived data in
|
|
* \param datalen length of buffer to fill
|
|
* \param pwd The password to use. For compliance with PKCS#12 §B.1, this
|
|
* should be a BMPString, i.e. a Unicode string where each
|
|
* character is encoded as 2 bytes in big-endian order, with
|
|
* no byte order mark and with a null terminator (i.e. the
|
|
* last two bytes should be 0x00 0x00).
|
|
* \param pwdlen length of the password (may be 0).
|
|
* \param salt Salt buffer to use. This may only be \c NULL when
|
|
* \p saltlen is 0.
|
|
* \param saltlen length of the salt (may be zero)
|
|
* \param mbedtls_md mbedtls_md type to use during the derivation
|
|
* \param id id that describes the purpose (can be
|
|
* #MBEDTLS_PKCS12_DERIVE_KEY, #MBEDTLS_PKCS12_DERIVE_IV or
|
|
* #MBEDTLS_PKCS12_DERIVE_MAC_KEY)
|
|
* \param iterations number of iterations
|
|
*
|
|
* \return 0 if successful, or a MD, BIGNUM type error.
|
|
*/
|
|
int mbedtls_pkcs12_derivation(unsigned char *data, size_t datalen,
|
|
const unsigned char *pwd, size_t pwdlen,
|
|
const unsigned char *salt, size_t saltlen,
|
|
mbedtls_md_type_t mbedtls_md, int id, int iterations);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* pkcs12.h */
|