X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=crypto%2Fdh%2Fdh_ameth.c;h=907a867ecac2174c89c28ed1fd9cbceab855a22b;hb=3f883c7c835ff577a6df37e238956c5b9016dc93;hp=14c08424558d66105dae5a90e98e1245889c86a1;hpb=ada66e78ef535fe80e422bbbadffe8e7863d457c;p=thirdparty%2Fopenssl.git

diff --git a/crypto/dh/dh_ameth.c b/crypto/dh/dh_ameth.c
index 14c0842455..907a867eca 100644
--- a/crypto/dh/dh_ameth.c
+++ b/crypto/dh/dh_ameth.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2006-2021 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
@@ -14,16 +14,17 @@
 #include "internal/deprecated.h"
 
 #include <stdio.h>
-#include "internal/cryptlib.h"
 #include <openssl/x509.h>
 #include <openssl/asn1.h>
-#include "dh_local.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 <openssl/cms.h>
-#include <openssl/core_names.h>
-#include "internal/param_build.h"
+#include "dh_local.h"
 
 /*
  * i2d/d2i like DH parameter functions which use the appropriate routine for
@@ -33,14 +34,20 @@
 static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp,
                    long length)
 {
-    if (pkey->ameth == &dhx_asn1_meth)
-        return d2i_DHxparams(NULL, pp, length);
-    return d2i_DHparams(NULL, pp, 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 == &dhx_asn1_meth)
+    if (pkey->ameth == &ossl_dhx_asn1_meth)
         return i2d_DHxparams(a, pp);
     return i2d_DHparams(a, pp);
 }
@@ -50,7 +57,7 @@ static void int_dh_free(EVP_PKEY *pkey)
     DH_free(pkey->pkey.dh);
 }
 
-static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
+static int dh_pub_decode(EVP_PKEY *pkey, const X509_PUBKEY *pubkey)
 {
     const unsigned char *p, *pm;
     int pklen, pmlen;
@@ -67,7 +74,7 @@ static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
     X509_ALGOR_get0(NULL, &ptype, &pval, palg);
 
     if (ptype != V_ASN1_SEQUENCE) {
-        DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR);
+        ERR_raise(ERR_LIB_DH, DH_R_PARAMETER_ENCODING_ERROR);
         goto err;
     }
 
@@ -76,18 +83,18 @@ static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
     pmlen = pstr->length;
 
     if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) {
-        DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
+        ERR_raise(ERR_LIB_DH, DH_R_DECODE_ERROR);
         goto err;
     }
 
     if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
-        DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR);
+        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) {
-        DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR);
+        ERR_raise(ERR_LIB_DH, DH_R_BN_DECODE_ERROR);
         goto err;
     }
 
@@ -99,7 +106,6 @@ static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
     ASN1_INTEGER_free(public_key);
     DH_free(dh);
     return 0;
-
 }
 
 static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
@@ -115,12 +121,12 @@ static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 
     str = ASN1_STRING_new();
     if (str == NULL) {
-        DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+        ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
         goto err;
     }
     str->length = i2d_dhp(pkey, dh, &str->data);
     if (str->length <= 0) {
-        DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+        ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
         goto err;
     }
     ptype = V_ASN1_SEQUENCE;
@@ -134,7 +140,7 @@ static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
     ASN1_INTEGER_free(pub_key);
 
     if (penclen <= 0) {
-        DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
+        ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
         goto err;
     }
 
@@ -157,53 +163,15 @@ static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
 
 static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
 {
-    const unsigned char *p, *pm;
-    int pklen, pmlen;
-    int ptype;
-    const void *pval;
-    const ASN1_STRING *pstr;
-    const X509_ALGOR *palg;
-    ASN1_INTEGER *privkey = NULL;
-    DH *dh = NULL;
-
-    if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
-        return 0;
+    int ret = 0;
+    DH *dh = ossl_dh_key_from_pkcs8(p8, NULL, NULL);
 
-    X509_ALGOR_get0(NULL, &ptype, &pval, palg);
-
-    if (ptype != V_ASN1_SEQUENCE)
-        goto decerr;
-    if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
-        goto decerr;
-
-    pstr = pval;
-    pm = pstr->data;
-    pmlen = pstr->length;
-    if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL)
-        goto decerr;
-
-    /* We have parameters now set private key */
-    if ((dh->priv_key = BN_secure_new()) == NULL
-        || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) {
-        DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR);
-        goto dherr;
+    if (dh != NULL) {
+        ret = 1;
+        EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
     }
-    /* Calculate public key, increments dirty_cnt */
-    if (!DH_generate_key(dh))
-        goto dherr;
-
-    EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
-
-    ASN1_STRING_clear_free(privkey);
-
-    return 1;
 
- decerr:
-    DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR);
- dherr:
-    DH_free(dh);
-    ASN1_STRING_clear_free(privkey);
-    return 0;
+    return ret;
 }
 
 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
@@ -216,13 +184,13 @@ static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
     params = ASN1_STRING_new();
 
     if (params == NULL) {
-        DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
+        ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
         goto err;
     }
 
     params->length = i2d_dhp(pkey, pkey->pkey.dh, &params->data);
     if (params->length <= 0) {
-        DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
+        ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
         goto err;
     }
     params->type = V_ASN1_SEQUENCE;
@@ -231,7 +199,7 @@ static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
     prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL);
 
     if (prkey == NULL) {
-        DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR);
+        ERR_raise(ERR_LIB_DH, DH_R_BN_ERROR);
         goto err;
     }
 
@@ -258,10 +226,8 @@ static int dh_param_decode(EVP_PKEY *pkey,
 {
     DH *dh;
 
-    if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) {
-        DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB);
+    if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL)
         return 0;
-    }
     dh->dirty_cnt++;
     EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh);
     return 1;
@@ -311,7 +277,7 @@ static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype)
     if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent))
         goto err;
 
-    if (!ffc_params_print(bp, &x->params, indent))
+    if (!ossl_ffc_params_print(bp, &x->params, indent))
         goto err;
 
     if (x->length != 0) {
@@ -324,7 +290,7 @@ static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype)
     return 1;
 
  err:
-    DHerr(DH_F_DO_DH_PRINT, reason);
+    ERR_raise(ERR_LIB_DH, reason);
     return 0;
 }
 
@@ -345,15 +311,15 @@ static int dh_security_bits(const EVP_PKEY *pkey)
 
 static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
 {
-    return ffc_params_cmp(&a->pkey.dh->params, &a->pkey.dh->params,
-                          a->ameth != &dhx_asn1_meth);
+    return ossl_ffc_params_cmp(&a->pkey.dh->params, &a->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 (!ffc_params_copy(&to->params, &from->params))
+    if (!ossl_ffc_params_copy(&to->params, &from->params))
         return 0;
     if (!is_x942)
         to->length = from->length;
@@ -382,7 +348,7 @@ static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
             return 0;
     }
     return int_dh_param_copy(to->pkey.dh, from->pkey.dh,
-                             from->ameth == &dhx_asn1_meth);
+                             from->ameth == &ossl_dhx_asn1_meth);
 }
 
 static int dh_missing_parameters(const EVP_PKEY *a)
@@ -425,18 +391,16 @@ int DHparams_print(BIO *bp, const DH *x)
     return do_dh_print(bp, x, 4, 0);
 }
 
-#ifndef OPENSSL_NO_CMS
-static int dh_cms_decrypt(CMS_RecipientInfo *ri);
-static int dh_cms_encrypt(CMS_RecipientInfo *ri);
-#endif
-
 static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 {
     switch (op) {
     case ASN1_PKEY_CTRL_SET1_TLS_ENCPT:
-        return dh_buf2key(EVP_PKEY_get0_DH(pkey), arg2, arg1);
+        /* We should only be here if we have a legacy key */
+        if (!ossl_assert(evp_pkey_is_legacy(pkey)))
+            return 0;
+        return ossl_dh_buf2key(evp_pkey_get0_DH_int(pkey), arg2, arg1);
     case ASN1_PKEY_CTRL_GET1_TLS_ENCPT:
-        return dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2);
+        return ossl_dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2, 0, 1);
     default:
         return -2;
     }
@@ -445,19 +409,6 @@ static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 {
     switch (op) {
-#ifndef OPENSSL_NO_CMS
-
-    case ASN1_PKEY_CTRL_CMS_ENVELOPE:
-        if (arg1 == 1)
-            return dh_cms_decrypt(arg2);
-        else if (arg1 == 0)
-            return dh_cms_encrypt(arg2);
-        return -2;
-
-    case ASN1_PKEY_CTRL_CMS_RI_TYPE:
-        *(int *)arg2 = CMS_RECIPINFO_AGREE;
-        return 1;
-#endif
     default:
         return -2;
     }
@@ -469,7 +420,7 @@ static int dh_pkey_public_check(const EVP_PKEY *pkey)
     DH *dh = pkey->pkey.dh;
 
     if (dh->pub_key == NULL) {
-        DHerr(DH_F_DH_PKEY_PUBLIC_CHECK, DH_R_MISSING_PUBKEY);
+        ERR_raise(ERR_LIB_DH, DH_R_MISSING_PUBKEY);
         return 0;
     }
 
@@ -489,49 +440,161 @@ static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey)
 }
 
 static int dh_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
-                             EVP_KEYMGMT *to_keymgmt)
+                             EVP_KEYMGMT *to_keymgmt, OSSL_LIB_CTX *libctx,
+                             const char *propq)
 {
     DH *dh = from->pkey.dh;
-    OSSL_PARAM_BLD tmpl;
+    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;
-    int rv;
+    OSSL_PARAM *params = NULL;
+    int selection = 0;
+    int rv = 0;
+
+    /*
+     * If the DH method is foreign, then we can't be sure of anything, and
+     * can therefore not export or pretend to export.
+     */
+    if (ossl_dh_get_method(dh) != DH_OpenSSL())
+        return 0;
 
     if (p == NULL || g == NULL)
         return 0;
 
-    ossl_param_bld_init(&tmpl);
-    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))
+    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))
-            return 0;
+        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;
     }
-    /* A key must at least have a public part. */
-    if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key))
-        return 0;
     if (priv_key != NULL) {
-        if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PRIV_KEY,
+        if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PRIV_KEY,
                                     priv_key))
-            return 0;
+            goto err;
+        selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
     }
 
-    if ((params = ossl_param_bld_to_param(&tmpl)) == NULL)
-        return 0;
+    if ((params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
+        goto err;
 
     /* We export, the provider imports */
-    rv = evp_keymgmt_import(to_keymgmt, to_keydata, OSSL_KEYMGMT_SELECT_ALL,
-                            params);
-
-    ossl_param_bld_free(params);
+    rv = evp_keymgmt_import(to_keymgmt, to_keydata, selection, params);
 
+    OSSL_PARAM_free(params);
+err:
+    OSSL_PARAM_BLD_free(tmpl);
     return rv;
 }
 
-const EVP_PKEY_ASN1_METHOD dh_asn1_meth = {
+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_MALLOC_FAILURE);
+        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)
+        || !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 ossl_inline int dh_bn_dup_check(BIGNUM **out, const BIGNUM *f)
+{
+    if (f != NULL && (*out = BN_dup(f)) == NULL)
+        return 0;
+    return 1;
+}
+
+static DH *dh_dup(const DH *dh)
+{
+    DH *dupkey = NULL;
+
+    /* Do not try to duplicate foreign DH keys */
+    if (ossl_dh_get_method(dh) != DH_OpenSSL())
+        return NULL;
+
+    if ((dupkey = ossl_dh_new_ex(dh->libctx)) == NULL)
+        return NULL;
+
+    dupkey->length = DH_get_length(dh);
+    if (!ossl_ffc_params_copy(&dupkey->params, &dh->params))
+        goto err;
+
+    dupkey->flags = dh->flags;
+
+    if (!dh_bn_dup_check(&dupkey->pub_key, dh->pub_key))
+        goto err;
+    if (!dh_bn_dup_check(&dupkey->priv_key, dh->priv_key))
+        goto err;
+
+    if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_DH,
+                            &dupkey->ex_data, &dh->ex_data))
+        goto err;
+
+    return dupkey;
+
+ err:
+    DH_free(dupkey);
+    return NULL;
+}
+
+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 = dh_dup(dh);
+        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,
@@ -573,9 +636,11 @@ const EVP_PKEY_ASN1_METHOD dh_asn1_meth = {
 
     dh_pkey_dirty_cnt,
     dh_pkey_export_to,
+    dh_pkey_import_from,
+    dh_pkey_copy
 };
 
-const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = {
+const EVP_PKEY_ASN1_METHOD ossl_dhx_asn1_meth = {
     EVP_PKEY_DHX,
     EVP_PKEY_DHX,
     0,
@@ -611,310 +676,10 @@ const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = {
 
     0,
     dh_pkey_public_check,
-    dh_pkey_param_check
+    dh_pkey_param_check,
+    0, 0, 0, 0,
+    dh_pkey_dirty_cnt,
+    dh_pkey_export_to,
+    dhx_pkey_import_from,
+    dh_pkey_copy
 };
-
-#ifndef OPENSSL_NO_CMS
-
-static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
-                              X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
-{
-    const ASN1_OBJECT *aoid;
-    int atype;
-    const void *aval;
-    ASN1_INTEGER *public_key = NULL;
-    int rv = 0;
-    EVP_PKEY *pkpeer = NULL, *pk = NULL;
-    DH *dhpeer = NULL;
-    const unsigned char *p;
-    int plen;
-
-    X509_ALGOR_get0(&aoid, &atype, &aval, alg);
-    if (OBJ_obj2nid(aoid) != NID_dhpublicnumber)
-        goto err;
-    /* Only absent parameters allowed in RFC XXXX */
-    if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL)
-        goto err;
-
-    pk = EVP_PKEY_CTX_get0_pkey(pctx);
-    if (pk == NULL)
-        goto err;
-    if (pk->type != EVP_PKEY_DHX)
-        goto err;
-    /* Get parameters from parent key */
-    dhpeer = DHparams_dup(pk->pkey.dh);
-    /* We have parameters now set public key */
-    plen = ASN1_STRING_length(pubkey);
-    p = ASN1_STRING_get0_data(pubkey);
-    if (p == NULL || plen == 0)
-        goto err;
-
-    if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) {
-        DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR);
-        goto err;
-    }
-
-    /* We have parameters now set public key */
-    if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
-        DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR);
-        goto err;
-    }
-
-    pkpeer = EVP_PKEY_new();
-    if (pkpeer == NULL)
-        goto err;
-    EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer);
-    dhpeer = NULL;
-    if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
-        rv = 1;
- err:
-    ASN1_INTEGER_free(public_key);
-    EVP_PKEY_free(pkpeer);
-    DH_free(dhpeer);
-    return rv;
-}
-
-static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri)
-{
-    int rv = 0;
-
-    X509_ALGOR *alg, *kekalg = NULL;
-    ASN1_OCTET_STRING *ukm;
-    const unsigned char *p;
-    unsigned char *dukm = NULL;
-    size_t dukmlen = 0;
-    int keylen, plen;
-    const EVP_CIPHER *kekcipher;
-    EVP_CIPHER_CTX *kekctx;
-
-    if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
-        goto err;
-
-    /*
-     * For DH we only have one OID permissible. If ever any more get defined
-     * we will need something cleverer.
-     */
-    if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) {
-        DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR);
-        goto err;
-    }
-
-    if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0)
-        goto err;
-
-    if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0)
-        goto err;
-
-    if (alg->parameter->type != V_ASN1_SEQUENCE)
-        goto err;
-
-    p = alg->parameter->value.sequence->data;
-    plen = alg->parameter->value.sequence->length;
-    kekalg = d2i_X509_ALGOR(NULL, &p, plen);
-    if (!kekalg)
-        goto err;
-    kekctx = CMS_RecipientInfo_kari_get0_ctx(ri);
-    if (!kekctx)
-        goto err;
-    kekcipher = EVP_get_cipherbyobj(kekalg->algorithm);
-    if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
-        goto err;
-    if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
-        goto err;
-    if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0)
-        goto err;
-
-    keylen = EVP_CIPHER_CTX_key_length(kekctx);
-    if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
-        goto err;
-    /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */
-    if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx,
-                                     OBJ_nid2obj(EVP_CIPHER_type(kekcipher)))
-        <= 0)
-        goto err;
-
-    if (ukm) {
-        dukmlen = ASN1_STRING_length(ukm);
-        dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen);
-        if (!dukm)
-            goto err;
-    }
-
-    if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
-        goto err;
-    dukm = NULL;
-
-    rv = 1;
- err:
-    X509_ALGOR_free(kekalg);
-    OPENSSL_free(dukm);
-    return rv;
-}
-
-static int dh_cms_decrypt(CMS_RecipientInfo *ri)
-{
-    EVP_PKEY_CTX *pctx;
-
-    pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
-
-    if (pctx == NULL)
-        return 0;
-    /* See if we need to set peer key */
-    if (!EVP_PKEY_CTX_get0_peerkey(pctx)) {
-        X509_ALGOR *alg;
-        ASN1_BIT_STRING *pubkey;
-        if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey,
-                                                 NULL, NULL, NULL))
-            return 0;
-        if (!alg || !pubkey)
-            return 0;
-        if (!dh_cms_set_peerkey(pctx, alg, pubkey)) {
-            DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR);
-            return 0;
-        }
-    }
-    /* Set DH derivation parameters and initialise unwrap context */
-    if (!dh_cms_set_shared_info(pctx, ri)) {
-        DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR);
-        return 0;
-    }
-    return 1;
-}
-
-static int dh_cms_encrypt(CMS_RecipientInfo *ri)
-{
-    EVP_PKEY_CTX *pctx;
-    EVP_PKEY *pkey;
-    EVP_CIPHER_CTX *ctx;
-    int keylen;
-    X509_ALGOR *talg, *wrap_alg = NULL;
-    const ASN1_OBJECT *aoid;
-    ASN1_BIT_STRING *pubkey;
-    ASN1_STRING *wrap_str;
-    ASN1_OCTET_STRING *ukm;
-    unsigned char *penc = NULL, *dukm = NULL;
-    int penclen;
-    size_t dukmlen = 0;
-    int rv = 0;
-    int kdf_type, wrap_nid;
-    const EVP_MD *kdf_md;
-
-    pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
-    if (pctx == NULL)
-        return 0;
-    /* Get ephemeral key */
-    pkey = EVP_PKEY_CTX_get0_pkey(pctx);
-    if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey,
-                                             NULL, NULL, NULL))
-        goto err;
-    X509_ALGOR_get0(&aoid, NULL, NULL, talg);
-    /* Is everything uninitialised? */
-    if (aoid == OBJ_nid2obj(NID_undef)) {
-        ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL);
-
-        if (pubk == NULL)
-            goto err;
-        /* Set the key */
-
-        penclen = i2d_ASN1_INTEGER(pubk, &penc);
-        ASN1_INTEGER_free(pubk);
-        if (penclen <= 0)
-            goto err;
-        ASN1_STRING_set0(pubkey, penc, penclen);
-        pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
-        pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT;
-
-        penc = NULL;
-        X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber),
-                        V_ASN1_UNDEF, NULL);
-    }
-
-    /* See if custom parameters set */
-    kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx);
-    if (kdf_type <= 0)
-        goto err;
-    if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md))
-        goto err;
-
-    if (kdf_type == EVP_PKEY_DH_KDF_NONE) {
-        kdf_type = EVP_PKEY_DH_KDF_X9_42;
-        if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0)
-            goto err;
-    } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42)
-        /* Unknown KDF */
-        goto err;
-    if (kdf_md == NULL) {
-        /* Only SHA1 supported */
-        kdf_md = EVP_sha1();
-        if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0)
-            goto err;
-    } else if (EVP_MD_type(kdf_md) != NID_sha1)
-        /* Unsupported digest */
-        goto err;
-
-    if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
-        goto err;
-
-    /* Get wrap NID */
-    ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
-    wrap_nid = EVP_CIPHER_CTX_type(ctx);
-    if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0)
-        goto err;
-    keylen = EVP_CIPHER_CTX_key_length(ctx);
-
-    /* Package wrap algorithm in an AlgorithmIdentifier */
-
-    wrap_alg = X509_ALGOR_new();
-    if (wrap_alg == NULL)
-        goto err;
-    wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
-    wrap_alg->parameter = ASN1_TYPE_new();
-    if (wrap_alg->parameter == NULL)
-        goto err;
-    if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0)
-        goto err;
-    if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) {
-        ASN1_TYPE_free(wrap_alg->parameter);
-        wrap_alg->parameter = NULL;
-    }
-
-    if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0)
-        goto err;
-
-    if (ukm) {
-        dukmlen = ASN1_STRING_length(ukm);
-        dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen);
-        if (!dukm)
-            goto err;
-    }
-
-    if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0)
-        goto err;
-    dukm = NULL;
-
-    /*
-     * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter
-     * of another AlgorithmIdentifier.
-     */
-    penc = NULL;
-    penclen = i2d_X509_ALGOR(wrap_alg, &penc);
-    if (penc == NULL || penclen == 0)
-        goto err;
-    wrap_str = ASN1_STRING_new();
-    if (wrap_str == NULL)
-        goto err;
-    ASN1_STRING_set0(wrap_str, penc, penclen);
-    penc = NULL;
-    X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH),
-                    V_ASN1_SEQUENCE, wrap_str);
-
-    rv = 1;
-
- err:
-    OPENSSL_free(penc);
-    X509_ALGOR_free(wrap_alg);
-    OPENSSL_free(dukm);
-    return rv;
-}
-
-#endif