#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 "crypto/asn1.h"
-#include "crypto/dh.h"
-#include "crypto/evp.h"
-#include <openssl/cms.h>
#include <openssl/core_names.h>
#include <openssl/param_build.h>
+#include <openssl/cms.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
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) {
{
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;
dh_pkey_export_to,
dhx_pkey_import_from,
};
-
-#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
projects / openssl.git / blobdiff