776796e818
CRMF, SSKDF, TLS1_PRF and SIV are affected by this. This also forces the need to check MAC names, which leads to storing the names in the created methods, which affects all EVP APIs, not just EVP_MAC. We will want that kind of information anyway (for example for 'openssl list')... Consequently, EVP_MAC_name() is re-implemented. Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Shane Lontis <shane.lontis@oracle.com> (Merged from https://github.com/openssl/openssl/pull/8877)
245 lines
8.1 KiB
C
245 lines
8.1 KiB
C
/*-
|
|
* Copyright 2007-2019 The OpenSSL Project Authors. All Rights Reserved.
|
|
* Copyright Nokia 2007-2019
|
|
* Copyright Siemens AG 2015-2019
|
|
*
|
|
* Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*
|
|
* CRMF implementation by Martin Peylo, Miikka Viljanen, and David von Oheimb.
|
|
*/
|
|
|
|
|
|
#include <string.h>
|
|
|
|
#include <openssl/rand.h>
|
|
#include <openssl/evp.h>
|
|
|
|
#include "crmf_int.h"
|
|
|
|
/* explicit #includes not strictly needed since implied by the above: */
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/crmf.h>
|
|
#include <openssl/err.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/params.h>
|
|
#include <openssl/core_names.h>
|
|
|
|
/*-
|
|
* creates and initializes OSSL_CRMF_PBMPARAMETER (section 4.4)
|
|
* |slen| SHOULD be > 8 (16 is common)
|
|
* |owfnid| e.g., NID_sha256
|
|
* |itercnt| MUST be > 100 (500 is common)
|
|
* |macnid| e.g., NID_hmac_sha1
|
|
* returns pointer to OSSL_CRMF_PBMPARAMETER on success, NULL on error
|
|
*/
|
|
OSSL_CRMF_PBMPARAMETER *OSSL_CRMF_pbmp_new(size_t slen, int owfnid,
|
|
int itercnt, int macnid)
|
|
{
|
|
OSSL_CRMF_PBMPARAMETER *pbm = NULL;
|
|
unsigned char *salt = NULL;
|
|
|
|
if ((pbm = OSSL_CRMF_PBMPARAMETER_new()) == NULL) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBMP_NEW, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* salt contains a randomly generated value used in computing the key
|
|
* of the MAC process. The salt SHOULD be at least 8 octets (64
|
|
* bits) long.
|
|
*/
|
|
if ((salt = OPENSSL_malloc(slen)) == NULL) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBMP_NEW, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (RAND_bytes(salt, (int)slen) <= 0) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBMP_NEW, CRMF_R_FAILURE_OBTAINING_RANDOM);
|
|
goto err;
|
|
}
|
|
if (!ASN1_OCTET_STRING_set(pbm->salt, salt, (int)slen))
|
|
goto err;
|
|
|
|
/*
|
|
* owf identifies the hash algorithm and associated parameters used to
|
|
* compute the key used in the MAC process. All implementations MUST
|
|
* support SHA-1.
|
|
*/
|
|
if (!X509_ALGOR_set0(pbm->owf, OBJ_nid2obj(owfnid), V_ASN1_UNDEF, NULL)) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBMP_NEW, CRMF_R_SETTING_OWF_ALGOR_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* iterationCount identifies the number of times the hash is applied
|
|
* during the key computation process. The iterationCount MUST be a
|
|
* minimum of 100. Many people suggest using values as high as 1000
|
|
* iterations as the minimum value. The trade off here is between
|
|
* protection of the password from attacks and the time spent by the
|
|
* server processing all of the different iterations in deriving
|
|
* passwords. Hashing is generally considered a cheap operation but
|
|
* this may not be true with all hash functions in the future.
|
|
*/
|
|
if (itercnt < 100) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBMP_NEW, CRMF_R_ITERATIONCOUNT_BELOW_100);
|
|
goto err;
|
|
}
|
|
|
|
if (!ASN1_INTEGER_set(pbm->iterationCount, itercnt)) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBMP_NEW, CRMF_R_CRMFERROR);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* mac identifies the algorithm and associated parameters of the MAC
|
|
* function to be used. All implementations MUST support HMAC-SHA1 [HMAC].
|
|
* All implementations SHOULD support DES-MAC and Triple-DES-MAC [PKCS11].
|
|
*/
|
|
if (!X509_ALGOR_set0(pbm->mac, OBJ_nid2obj(macnid), V_ASN1_UNDEF, NULL)) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBMP_NEW, CRMF_R_SETTING_MAC_ALGOR_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
OPENSSL_free(salt);
|
|
return pbm;
|
|
err:
|
|
OPENSSL_free(salt);
|
|
OSSL_CRMF_PBMPARAMETER_free(pbm);
|
|
return NULL;
|
|
}
|
|
|
|
/*-
|
|
* calculates the PBM based on the settings of the given OSSL_CRMF_PBMPARAMETER
|
|
* |pbmp| identifies the algorithms, salt to use
|
|
* |msg| message to apply the PBM for
|
|
* |msglen| length of the message
|
|
* |sec| key to use
|
|
* |seclen| length of the key
|
|
* |mac| pointer to the computed mac, will be set on success
|
|
* |maclen| if not NULL, will set variable to the length of the mac on success
|
|
* returns 1 on success, 0 on error
|
|
*/
|
|
int OSSL_CRMF_pbm_new(const OSSL_CRMF_PBMPARAMETER *pbmp,
|
|
const unsigned char *msg, size_t msglen,
|
|
const unsigned char *sec, size_t seclen,
|
|
unsigned char **out, size_t *outlen)
|
|
{
|
|
int mac_nid, hmac_md_nid = NID_undef;
|
|
const char *mdname = NULL;
|
|
const EVP_MD *m = NULL;
|
|
EVP_MD_CTX *ctx = NULL;
|
|
unsigned char basekey[EVP_MAX_MD_SIZE];
|
|
unsigned int bklen = EVP_MAX_MD_SIZE;
|
|
int64_t iterations;
|
|
unsigned char *mac_res = 0;
|
|
int ok = 0;
|
|
EVP_MAC *mac = NULL;
|
|
EVP_MAC_CTX *mctx = NULL;
|
|
OSSL_PARAM macparams[3] =
|
|
{ OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END };
|
|
|
|
if (out == NULL || pbmp == NULL || pbmp->mac == NULL
|
|
|| pbmp->mac->algorithm == NULL || msg == NULL || sec == NULL) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBM_NEW, CRMF_R_NULL_ARGUMENT);
|
|
goto err;
|
|
}
|
|
if ((mac_res = OPENSSL_malloc(EVP_MAX_MD_SIZE)) == NULL) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBM_NEW, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* owf identifies the hash algorithm and associated parameters used to
|
|
* compute the key used in the MAC process. All implementations MUST
|
|
* support SHA-1.
|
|
*/
|
|
if ((m = EVP_get_digestbyobj(pbmp->owf->algorithm)) == NULL) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBM_NEW, CRMF_R_UNSUPPORTED_ALGORITHM);
|
|
goto err;
|
|
}
|
|
|
|
if ((ctx = EVP_MD_CTX_new()) == NULL) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBM_NEW, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* compute the basekey of the salted secret */
|
|
if (!EVP_DigestInit_ex(ctx, m, NULL))
|
|
goto err;
|
|
/* first the secret */
|
|
if (!EVP_DigestUpdate(ctx, sec, seclen))
|
|
goto err;
|
|
/* then the salt */
|
|
if (!EVP_DigestUpdate(ctx, pbmp->salt->data, pbmp->salt->length))
|
|
goto err;
|
|
if (!EVP_DigestFinal_ex(ctx, basekey, &bklen))
|
|
goto err;
|
|
if (!ASN1_INTEGER_get_int64(&iterations, pbmp->iterationCount)
|
|
|| iterations < 100 /* min from RFC */
|
|
|| iterations > OSSL_CRMF_PBM_MAX_ITERATION_COUNT) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBM_NEW, CRMF_R_BAD_PBM_ITERATIONCOUNT);
|
|
goto err;
|
|
}
|
|
|
|
/* the first iteration was already done above */
|
|
while (--iterations > 0) {
|
|
if (!EVP_DigestInit_ex(ctx, m, NULL))
|
|
goto err;
|
|
if (!EVP_DigestUpdate(ctx, basekey, bklen))
|
|
goto err;
|
|
if (!EVP_DigestFinal_ex(ctx, basekey, &bklen))
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* mac identifies the algorithm and associated parameters of the MAC
|
|
* function to be used. All implementations MUST support HMAC-SHA1 [HMAC].
|
|
* All implementations SHOULD support DES-MAC and Triple-DES-MAC [PKCS11].
|
|
*/
|
|
mac_nid = OBJ_obj2nid(pbmp->mac->algorithm);
|
|
|
|
if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, mac_nid, NULL, &hmac_md_nid, NULL)
|
|
|| ((mdname = OBJ_nid2sn(hmac_md_nid)) == NULL)) {
|
|
CRMFerr(CRMF_F_OSSL_CRMF_PBM_NEW, CRMF_R_UNSUPPORTED_ALGORITHM);
|
|
goto err;
|
|
}
|
|
|
|
macparams[0] =
|
|
OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_ALGORITHM,
|
|
(char *)mdname, strlen(mdname) + 1);
|
|
macparams[1] =
|
|
OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY, basekey, bklen);
|
|
if ((mac = EVP_MAC_fetch(NULL, "HMAC", NULL)) == NULL
|
|
|| (mctx = EVP_MAC_CTX_new(mac)) == NULL
|
|
|| !EVP_MAC_CTX_set_params(mctx, macparams)
|
|
|| !EVP_MAC_init(mctx)
|
|
|| !EVP_MAC_update(mctx, msg, msglen)
|
|
|| !EVP_MAC_final(mctx, mac_res, outlen, EVP_MAX_MD_SIZE))
|
|
goto err;
|
|
|
|
ok = 1;
|
|
|
|
err:
|
|
/* cleanup */
|
|
OPENSSL_cleanse(basekey, bklen);
|
|
EVP_MAC_CTX_free(mctx);
|
|
EVP_MAC_free(mac);
|
|
EVP_MD_CTX_free(ctx);
|
|
|
|
if (ok == 1) {
|
|
*out = mac_res;
|
|
return 1;
|
|
}
|
|
|
|
OPENSSL_free(mac_res);
|
|
|
|
if (pbmp != NULL && pbmp->mac != NULL) {
|
|
char buf[128];
|
|
|
|
if (OBJ_obj2txt(buf, sizeof(buf), pbmp->mac->algorithm, 0))
|
|
ERR_add_error_data(1, buf);
|
|
}
|
|
return 0;
|
|
}
|