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mirror of https://github.com/openssl/openssl.git synced 2024-12-27 06:21:43 +08:00
openssl/crypto/dh/dh_ameth.c
Richard Levitte e077455e9e Stop raising ERR_R_MALLOC_FAILURE in most places
Since OPENSSL_malloc() and friends report ERR_R_MALLOC_FAILURE, and
at least handle the file name and line number they are called from,
there's no need to report ERR_R_MALLOC_FAILURE where they are called
directly, or when SSLfatal() and RLAYERfatal() is used, the reason
`ERR_R_MALLOC_FAILURE` is changed to `ERR_R_CRYPTO_LIB`.

There were a number of places where `ERR_R_MALLOC_FAILURE` was reported
even though it was a function from a different sub-system that was
called.  Those places are changed to report ERR_R_{lib}_LIB, where
{lib} is the name of that sub-system.
Some of them are tricky to get right, as we have a lot of functions
that belong in the ASN1 sub-system, and all the `sk_` calls or from
the CRYPTO sub-system.

Some extra adaptation was necessary where there were custom OPENSSL_malloc()
wrappers, and some bugs are fixed alongside these changes.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19301)
2022-10-05 14:02:03 +02:00

649 lines
15 KiB
C

/*
* Copyright 2006-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* 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
*/
/*
* DH low level APIs are deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
#include <stdio.h>
#include <openssl/x509.h>
#include <openssl/asn1.h>
#include <openssl/bn.h>
#include <openssl/core_names.h>
#include <openssl/param_build.h>
#include "internal/ffc.h"
#include "internal/cryptlib.h"
#include "crypto/asn1.h"
#include "crypto/dh.h"
#include "crypto/evp.h"
#include "dh_local.h"
/*
* i2d/d2i like DH parameter functions which use the appropriate routine for
* PKCS#3 DH or X9.42 DH.
*/
static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp,
long length)
{
DH *dh = NULL;
int is_dhx = (pkey->ameth == &ossl_dhx_asn1_meth);
if (is_dhx)
dh = d2i_DHxparams(NULL, pp, length);
else
dh = d2i_DHparams(NULL, pp, length);
return dh;
}
static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp)
{
if (pkey->ameth == &ossl_dhx_asn1_meth)
return i2d_DHxparams(a, pp);
return i2d_DHparams(a, pp);
}
static void int_dh_free(EVP_PKEY *pkey)
{
DH_free(pkey->pkey.dh);
}
static int dh_pub_decode(EVP_PKEY *pkey, const X509_PUBKEY *pubkey)
{
const unsigned char *p, *pm;
int pklen, pmlen;
int ptype;
const void *pval;
const ASN1_STRING *pstr;
X509_ALGOR *palg;
ASN1_INTEGER *public_key = NULL;
DH *dh = NULL;
if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
return 0;
X509_ALGOR_get0(NULL, &ptype, &pval, palg);
if (ptype != V_ASN1_SEQUENCE) {
ERR_raise(ERR_LIB_DH, DH_R_PARAMETER_ENCODING_ERROR);
goto err;
}
pstr = pval;
pm = pstr->data;
pmlen = pstr->length;
if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) {
ERR_raise(ERR_LIB_DH, DH_R_DECODE_ERROR);
goto err;
}
if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
ERR_raise(ERR_LIB_DH, DH_R_DECODE_ERROR);
goto err;
}
/* We have parameters now set public key */
if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
ERR_raise(ERR_LIB_DH, DH_R_BN_DECODE_ERROR);
goto err;
}
ASN1_INTEGER_free(public_key);
EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
return 1;
err:
ASN1_INTEGER_free(public_key);
DH_free(dh);
return 0;
}
static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
{
DH *dh;
int ptype;
unsigned char *penc = NULL;
int penclen;
ASN1_STRING *str;
ASN1_INTEGER *pub_key = NULL;
dh = pkey->pkey.dh;
str = ASN1_STRING_new();
if (str == NULL) {
ERR_raise(ERR_LIB_DH, ERR_R_ASN1_LIB);
goto err;
}
str->length = i2d_dhp(pkey, dh, &str->data);
if (str->length <= 0) {
ERR_raise(ERR_LIB_DH, ERR_R_ASN1_LIB);
goto err;
}
ptype = V_ASN1_SEQUENCE;
pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL);
if (pub_key == NULL)
goto err;
penclen = i2d_ASN1_INTEGER(pub_key, &penc);
ASN1_INTEGER_free(pub_key);
if (penclen <= 0) {
ERR_raise(ERR_LIB_DH, ERR_R_ASN1_LIB);
goto err;
}
if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
ptype, str, penc, penclen))
return 1;
err:
OPENSSL_free(penc);
ASN1_STRING_free(str);
return 0;
}
/*
* PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that
* the AlgorithmIdentifier contains the parameters, the private key is
* explicitly included and the pubkey must be recalculated.
*/
static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
{
int ret = 0;
DH *dh = ossl_dh_key_from_pkcs8(p8, NULL, NULL);
if (dh != NULL) {
ret = 1;
EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
}
return ret;
}
static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
{
ASN1_STRING *params = NULL;
ASN1_INTEGER *prkey = NULL;
unsigned char *dp = NULL;
int dplen;
params = ASN1_STRING_new();
if (params == NULL) {
ERR_raise(ERR_LIB_DH, ERR_R_ASN1_LIB);
goto err;
}
params->length = i2d_dhp(pkey, pkey->pkey.dh, &params->data);
if (params->length <= 0) {
ERR_raise(ERR_LIB_DH, ERR_R_ASN1_LIB);
goto err;
}
params->type = V_ASN1_SEQUENCE;
/* Get private key into integer */
prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
if (prkey == NULL) {
ERR_raise(ERR_LIB_DH, DH_R_BN_ERROR);
goto err;
}
dplen = i2d_ASN1_INTEGER(prkey, &dp);
ASN1_STRING_clear_free(prkey);
if (dplen <= 0) {
ERR_raise(ERR_LIB_DH, DH_R_BN_ERROR);
goto err;
}
if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
V_ASN1_SEQUENCE, params, dp, dplen)) {
OPENSSL_clear_free(dp, dplen);
goto err;
}
return 1;
err:
ASN1_STRING_free(params);
return 0;
}
static int dh_param_decode(EVP_PKEY *pkey,
const unsigned char **pder, int derlen)
{
DH *dh;
if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL)
return 0;
dh->dirty_cnt++;
EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
return 1;
}
static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
{
return i2d_dhp(pkey, pkey->pkey.dh, pder);
}
static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype)
{
int reason = ERR_R_BUF_LIB;
const char *ktype = NULL;
BIGNUM *priv_key, *pub_key;
if (ptype == 2)
priv_key = x->priv_key;
else
priv_key = NULL;
if (ptype > 0)
pub_key = x->pub_key;
else
pub_key = NULL;
if (x->params.p == NULL || (ptype == 2 && priv_key == NULL)
|| (ptype > 0 && pub_key == NULL)) {
reason = ERR_R_PASSED_NULL_PARAMETER;
goto err;
}
if (ptype == 2)
ktype = "DH Private-Key";
else if (ptype == 1)
ktype = "DH Public-Key";
else
ktype = "DH Parameters";
if (!BIO_indent(bp, indent, 128)
|| BIO_printf(bp, "%s: (%d bit)\n", ktype, DH_bits(x)) <= 0)
goto err;
indent += 4;
if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent))
goto err;
if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent))
goto err;
if (!ossl_ffc_params_print(bp, &x->params, indent))
goto err;
if (x->length != 0) {
if (!BIO_indent(bp, indent, 128)
|| BIO_printf(bp, "recommended-private-length: %d bits\n",
(int)x->length) <= 0)
goto err;
}
return 1;
err:
ERR_raise(ERR_LIB_DH, reason);
return 0;
}
static int int_dh_size(const EVP_PKEY *pkey)
{
return DH_size(pkey->pkey.dh);
}
static int dh_bits(const EVP_PKEY *pkey)
{
return DH_bits(pkey->pkey.dh);
}
static int dh_security_bits(const EVP_PKEY *pkey)
{
return DH_security_bits(pkey->pkey.dh);
}
static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
{
return ossl_ffc_params_cmp(&a->pkey.dh->params, &b->pkey.dh->params,
a->ameth != &ossl_dhx_asn1_meth);
}
static int int_dh_param_copy(DH *to, const DH *from, int is_x942)
{
if (is_x942 == -1)
is_x942 = (from->params.q != NULL);
if (!ossl_ffc_params_copy(&to->params, &from->params))
return 0;
if (!is_x942)
to->length = from->length;
to->dirty_cnt++;
return 1;
}
DH *DHparams_dup(const DH *dh)
{
DH *ret;
ret = DH_new();
if (ret == NULL)
return NULL;
if (!int_dh_param_copy(ret, dh, -1)) {
DH_free(ret);
return NULL;
}
return ret;
}
static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
{
if (to->pkey.dh == NULL) {
to->pkey.dh = DH_new();
if (to->pkey.dh == NULL)
return 0;
}
return int_dh_param_copy(to->pkey.dh, from->pkey.dh,
from->ameth == &ossl_dhx_asn1_meth);
}
static int dh_missing_parameters(const EVP_PKEY *a)
{
return a->pkey.dh == NULL
|| a->pkey.dh->params.p == NULL
|| a->pkey.dh->params.g == NULL;
}
static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
{
if (dh_cmp_parameters(a, b) == 0)
return 0;
if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0)
return 0;
else
return 1;
}
static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *ctx)
{
return do_dh_print(bp, pkey->pkey.dh, indent, 0);
}
static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *ctx)
{
return do_dh_print(bp, pkey->pkey.dh, indent, 1);
}
static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *ctx)
{
return do_dh_print(bp, pkey->pkey.dh, indent, 2);
}
int DHparams_print(BIO *bp, const DH *x)
{
return do_dh_print(bp, x, 4, 0);
}
static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
{
DH *dh;
switch (op) {
case ASN1_PKEY_CTRL_SET1_TLS_ENCPT:
/* We should only be here if we have a legacy key */
if (!ossl_assert(evp_pkey_is_legacy(pkey)))
return 0;
dh = (DH *) evp_pkey_get0_DH_int(pkey);
if (dh == NULL)
return 0;
return ossl_dh_buf2key(dh, arg2, arg1);
case ASN1_PKEY_CTRL_GET1_TLS_ENCPT:
dh = (DH *) EVP_PKEY_get0_DH(pkey);
if (dh == NULL)
return 0;
return ossl_dh_key2buf(dh, arg2, 0, 1);
default:
return -2;
}
}
static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
{
switch (op) {
default:
return -2;
}
}
static int dh_pkey_public_check(const EVP_PKEY *pkey)
{
DH *dh = pkey->pkey.dh;
if (dh->pub_key == NULL) {
ERR_raise(ERR_LIB_DH, DH_R_MISSING_PUBKEY);
return 0;
}
return DH_check_pub_key_ex(dh, dh->pub_key);
}
static int dh_pkey_param_check(const EVP_PKEY *pkey)
{
DH *dh = pkey->pkey.dh;
return DH_check_ex(dh);
}
static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey)
{
return pkey->pkey.dh->dirty_cnt;
}
static int dh_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
OSSL_FUNC_keymgmt_import_fn *importer,
OSSL_LIB_CTX *libctx, const char *propq)
{
DH *dh = from->pkey.dh;
OSSL_PARAM_BLD *tmpl;
const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh);
long l = DH_get_length(dh);
const BIGNUM *pub_key = DH_get0_pub_key(dh);
const BIGNUM *priv_key = DH_get0_priv_key(dh);
OSSL_PARAM *params = NULL;
int selection = 0;
int rv = 0;
if (p == NULL || g == NULL)
return 0;
tmpl = OSSL_PARAM_BLD_new();
if (tmpl == NULL)
return 0;
if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p)
|| !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g))
goto err;
if (q != NULL) {
if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_Q, q))
goto err;
}
selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS;
if (l > 0) {
if (!OSSL_PARAM_BLD_push_long(tmpl, OSSL_PKEY_PARAM_DH_PRIV_LEN, l))
goto err;
selection |= OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS;
}
if (pub_key != NULL) {
if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key))
goto err;
selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
}
if (priv_key != NULL) {
if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PRIV_KEY,
priv_key))
goto err;
selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
}
if ((params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
goto err;
/* We export, the provider imports */
rv = importer(to_keydata, selection, params);
OSSL_PARAM_free(params);
err:
OSSL_PARAM_BLD_free(tmpl);
return rv;
}
static int dh_pkey_import_from_type(const OSSL_PARAM params[], void *vpctx,
int type)
{
EVP_PKEY_CTX *pctx = vpctx;
EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pctx);
DH *dh = ossl_dh_new_ex(pctx->libctx);
if (dh == NULL) {
ERR_raise(ERR_LIB_DH, ERR_R_DH_LIB);
return 0;
}
DH_clear_flags(dh, DH_FLAG_TYPE_MASK);
DH_set_flags(dh, type == EVP_PKEY_DH ? DH_FLAG_TYPE_DH : DH_FLAG_TYPE_DHX);
if (!ossl_dh_params_fromdata(dh, params)
|| !ossl_dh_key_fromdata(dh, params, 1)
|| !EVP_PKEY_assign(pkey, type, dh)) {
DH_free(dh);
return 0;
}
return 1;
}
static int dh_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
{
return dh_pkey_import_from_type(params, vpctx, EVP_PKEY_DH);
}
static int dhx_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
{
return dh_pkey_import_from_type(params, vpctx, EVP_PKEY_DHX);
}
static int dh_pkey_copy(EVP_PKEY *to, EVP_PKEY *from)
{
DH *dh = from->pkey.dh;
DH *dupkey = NULL;
int ret;
if (dh != NULL) {
dupkey = ossl_dh_dup(dh, OSSL_KEYMGMT_SELECT_ALL);
if (dupkey == NULL)
return 0;
}
ret = EVP_PKEY_assign(to, from->type, dupkey);
if (!ret)
DH_free(dupkey);
return ret;
}
const EVP_PKEY_ASN1_METHOD ossl_dh_asn1_meth = {
EVP_PKEY_DH,
EVP_PKEY_DH,
0,
"DH",
"OpenSSL PKCS#3 DH method",
dh_pub_decode,
dh_pub_encode,
dh_pub_cmp,
dh_public_print,
dh_priv_decode,
dh_priv_encode,
dh_private_print,
int_dh_size,
dh_bits,
dh_security_bits,
dh_param_decode,
dh_param_encode,
dh_missing_parameters,
dh_copy_parameters,
dh_cmp_parameters,
dh_param_print,
0,
int_dh_free,
dh_pkey_ctrl,
0, 0, 0, 0, 0,
0,
dh_pkey_public_check,
dh_pkey_param_check,
0, 0, 0, 0,
dh_pkey_dirty_cnt,
dh_pkey_export_to,
dh_pkey_import_from,
dh_pkey_copy
};
const EVP_PKEY_ASN1_METHOD ossl_dhx_asn1_meth = {
EVP_PKEY_DHX,
EVP_PKEY_DHX,
0,
"X9.42 DH",
"OpenSSL X9.42 DH method",
dh_pub_decode,
dh_pub_encode,
dh_pub_cmp,
dh_public_print,
dh_priv_decode,
dh_priv_encode,
dh_private_print,
int_dh_size,
dh_bits,
dh_security_bits,
dh_param_decode,
dh_param_encode,
dh_missing_parameters,
dh_copy_parameters,
dh_cmp_parameters,
dh_param_print,
0,
int_dh_free,
dhx_pkey_ctrl,
0, 0, 0, 0, 0,
0,
dh_pkey_public_check,
dh_pkey_param_check,
0, 0, 0, 0,
dh_pkey_dirty_cnt,
dh_pkey_export_to,
dhx_pkey_import_from,
dh_pkey_copy
};