-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 2006.
*/
/* ====================================================================
- * Copyright (c) 2005 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#include "cryptlib.h"
#include <openssl/x509.h>
#include <openssl/ec.h>
+#include <openssl/bn.h>
+#ifndef OPENSSL_NO_CMS
+#include <openssl/cms.h>
+#endif
+#include <openssl/asn1t.h>
+#include "asn1_locl.h"
+
+static int ecdh_cms_decrypt(CMS_RecipientInfo *ri);
+static int ecdh_cms_encrypt(CMS_RecipientInfo *ri);
static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key)
{
if (!pstr)
return 0;
pstr->length = i2d_ECParameters(ec_key, &pstr->data);
- if (pstr->length < 0)
+ if (pstr->length <= 0)
{
ASN1_STRING_free(pstr);
ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB);
return 1;
}
-static int eckey_pub_encode(X509_PUBKEY *pk, EVP_PKEY *pkey)
+static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
{
EC_KEY *ec_key = pkey->pkey.ec;
void *pval = NULL;
penclen = i2o_ECPublicKey(ec_key, &p);
if (penclen <= 0)
goto err;
- if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
+ if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC),
ptype, pval, penc, penclen))
return 1;
err:
return 0;
}
+static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
+ {
+ int r;
+ const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
+ const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
+ *pb = EC_KEY_get0_public_key(b->pkey.ec);
+ r = EC_POINT_cmp(group, pa, pb, NULL);
+ if (r == 0)
+ return 1;
+ if (r == 1)
+ return 0;
+ return -2;
+ }
+
static int eckey_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
{
const unsigned char *p = NULL;
return 0;
}
-static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, EVP_PKEY *pkey)
+static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
{
EC_KEY *ec_key;
unsigned char *ep, *p;
EC_KEY_set_enc_flags(ec_key, old_flags);
OPENSSL_free(ep);
ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB);
+ return 0;
}
/* restore old encoding flags */
EC_KEY_set_enc_flags(ec_key, old_flags);
return 1;
}
-EVP_PKEY_ASN1_METHOD eckey_asn1_meth =
+static int int_ec_size(const EVP_PKEY *pkey)
+ {
+ return ECDSA_size(pkey->pkey.ec);
+ }
+
+static int ec_bits(const EVP_PKEY *pkey)
+ {
+ BIGNUM *order = BN_new();
+ const EC_GROUP *group;
+ int ret;
+
+ if (!order)
+ {
+ ERR_clear_error();
+ return 0;
+ }
+ group = EC_KEY_get0_group(pkey->pkey.ec);
+ if (!EC_GROUP_get_order(group, order, NULL))
+ {
+ ERR_clear_error();
+ return 0;
+ }
+
+ ret = BN_num_bits(order);
+ BN_free(order);
+ return ret;
+ }
+
+static int ec_missing_parameters(const EVP_PKEY *pkey)
+ {
+ if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
+ return 1;
+ return 0;
+ }
+
+static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
+ {
+ EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
+ if (group == NULL)
+ return 0;
+ if (EC_KEY_set_group(to->pkey.ec, group) == 0)
+ return 0;
+ EC_GROUP_free(group);
+ return 1;
+ }
+
+static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
+ {
+ const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
+ *group_b = EC_KEY_get0_group(b->pkey.ec);
+ if (EC_GROUP_cmp(group_a, group_b, NULL))
+ return 0;
+ else
+ return 1;
+ }
+
+static void int_ec_free(EVP_PKEY *pkey)
+ {
+ EC_KEY_free(pkey->pkey.ec);
+ }
+
+static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, int ktype)
+ {
+ unsigned char *buffer=NULL;
+ const char *ecstr;
+ size_t buf_len=0, i;
+ int ret=0, reason=ERR_R_BIO_LIB;
+ BIGNUM *pub_key=NULL, *order=NULL;
+ BN_CTX *ctx=NULL;
+ const EC_GROUP *group;
+ const EC_POINT *public_key;
+ const BIGNUM *priv_key;
+
+ if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL)
+ {
+ reason = ERR_R_PASSED_NULL_PARAMETER;
+ goto err;
+ }
+
+ ctx = BN_CTX_new();
+ if (ctx == NULL)
+ {
+ reason = ERR_R_MALLOC_FAILURE;
+ goto err;
+ }
+
+ if (ktype > 0)
+ {
+ public_key = EC_KEY_get0_public_key(x);
+ if (public_key != NULL)
+ {
+ if ((pub_key = EC_POINT_point2bn(group, public_key,
+ EC_KEY_get_conv_form(x), NULL, ctx)) == NULL)
+ {
+ reason = ERR_R_EC_LIB;
+ goto err;
+ }
+ buf_len = (size_t)BN_num_bytes(pub_key);
+ }
+ }
+
+ if (ktype == 2)
+ {
+ priv_key = EC_KEY_get0_private_key(x);
+ if (priv_key && (i = (size_t)BN_num_bytes(priv_key)) > buf_len)
+ buf_len = i;
+ }
+ else
+ priv_key = NULL;
+
+ if (ktype > 0)
+ {
+ buf_len += 10;
+ if ((buffer = OPENSSL_malloc(buf_len)) == NULL)
+ {
+ reason = ERR_R_MALLOC_FAILURE;
+ goto err;
+ }
+ }
+ if (ktype == 2)
+ ecstr = "Private-Key";
+ else if (ktype == 1)
+ ecstr = "Public-Key";
+ else
+ ecstr = "ECDSA-Parameters";
+
+ if (!BIO_indent(bp, off, 128))
+ goto err;
+ if ((order = BN_new()) == NULL)
+ goto err;
+ if (!EC_GROUP_get_order(group, order, NULL))
+ goto err;
+ if (BIO_printf(bp, "%s: (%d bit)\n", ecstr,
+ BN_num_bits(order)) <= 0) goto err;
+
+ if ((priv_key != NULL) && !ASN1_bn_print(bp, "priv:", priv_key,
+ buffer, off))
+ goto err;
+ if ((pub_key != NULL) && !ASN1_bn_print(bp, "pub: ", pub_key,
+ buffer, off))
+ goto err;
+ if (!ECPKParameters_print(bp, group, off))
+ goto err;
+ ret=1;
+err:
+ if (!ret)
+ ECerr(EC_F_DO_EC_KEY_PRINT, reason);
+ if (pub_key)
+ BN_free(pub_key);
+ if (order)
+ BN_free(order);
+ if (ctx)
+ BN_CTX_free(ctx);
+ if (buffer != NULL)
+ OPENSSL_free(buffer);
+ return(ret);
+ }
+
+static int eckey_param_decode(EVP_PKEY *pkey,
+ const unsigned char **pder, int derlen)
+ {
+ EC_KEY *eckey;
+ if (!(eckey = d2i_ECParameters(NULL, pder, derlen)))
+ {
+ ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB);
+ return 0;
+ }
+ EVP_PKEY_assign_EC_KEY(pkey, eckey);
+ return 1;
+ }
+
+static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
+ {
+ return i2d_ECParameters(pkey->pkey.ec, pder);
+ }
+
+static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 0);
+ }
+
+static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 1);
+ }
+
+
+static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
+ ASN1_PCTX *ctx)
+ {
+ return do_EC_KEY_print(bp, pkey->pkey.ec, indent, 2);
+ }
+
+static int old_ec_priv_decode(EVP_PKEY *pkey,
+ const unsigned char **pder, int derlen)
+ {
+ EC_KEY *ec;
+ if (!(ec = d2i_ECPrivateKey (NULL, pder, derlen)))
+ {
+ ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR);
+ return 0;
+ }
+ EVP_PKEY_assign_EC_KEY(pkey, ec);
+ return 1;
+ }
+
+static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
+ {
+ return i2d_ECPrivateKey(pkey->pkey.ec, pder);
+ }
+
+static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
+ {
+ switch (op)
+ {
+ case ASN1_PKEY_CTRL_PKCS7_SIGN:
+ if (arg1 == 0)
+ {
+ int snid, hnid;
+ X509_ALGOR *alg1, *alg2;
+ PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
+ if (alg1 == NULL || alg1->algorithm == NULL)
+ return -1;
+ hnid = OBJ_obj2nid(alg1->algorithm);
+ if (hnid == NID_undef)
+ return -1;
+ if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
+ return -1;
+ X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
+ }
+ return 1;
+#ifndef OPENSSL_NO_CMS
+ case ASN1_PKEY_CTRL_CMS_SIGN:
+ if (arg1 == 0)
+ {
+ int snid, hnid;
+ X509_ALGOR *alg1, *alg2;
+ CMS_SignerInfo_get0_algs(arg2, NULL, NULL,
+ &alg1, &alg2);
+ if (alg1 == NULL || alg1->algorithm == NULL)
+ return -1;
+ hnid = OBJ_obj2nid(alg1->algorithm);
+ if (hnid == NID_undef)
+ return -1;
+ if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
+ return -1;
+ X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
+ }
+ return 1;
+
+ case ASN1_PKEY_CTRL_CMS_ENVELOPE:
+ if (arg1 == 1)
+ return ecdh_cms_decrypt(arg2);
+ else if (arg1 == 0)
+ return ecdh_cms_encrypt(arg2);
+ return -2;
+
+ case ASN1_PKEY_CTRL_CMS_RI_TYPE:
+ *(int *)arg2 = CMS_RECIPINFO_AGREE;
+ return 1;
+#endif
+
+ case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
+ *(int *)arg2 = NID_sha256;
+ return 2;
+
+ default:
+ return -2;
+
+ }
+
+ }
+
+const EVP_PKEY_ASN1_METHOD eckey_asn1_meth =
{
EVP_PKEY_EC,
+ EVP_PKEY_EC,
0,
- 0,
+ "EC",
+ "OpenSSL EC algorithm",
+
eckey_pub_decode,
eckey_pub_encode,
- 0,
+ eckey_pub_cmp,
+ eckey_pub_print,
+
eckey_priv_decode,
eckey_priv_encode,
+ eckey_priv_print,
+
+ int_ec_size,
+ ec_bits,
+
+ eckey_param_decode,
+ eckey_param_encode,
+ ec_missing_parameters,
+ ec_copy_parameters,
+ ec_cmp_parameters,
+ eckey_param_print,
0,
- 0,
- 0
+
+ int_ec_free,
+ ec_pkey_ctrl,
+ old_ec_priv_decode,
+ old_ec_priv_encode
};
+
+#ifndef OPENSSL_NO_CMS
+
+static int ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx,
+ X509_ALGOR *alg, ASN1_BIT_STRING *pubkey)
+ {
+ ASN1_OBJECT *aoid;
+ int atype;
+ void *aval;
+ int rv = 0;
+ EVP_PKEY *pkpeer = NULL;
+ EC_KEY *ecpeer = NULL;
+ const unsigned char *p;
+ int plen;
+ X509_ALGOR_get0(&aoid, &atype, &aval, alg);
+ if (OBJ_obj2nid(aoid) != NID_X9_62_id_ecPublicKey)
+ goto err;
+ /* If absent parameters get group from main key */
+ if (atype == V_ASN1_UNDEF || atype == V_ASN1_NULL)
+ {
+ const EC_GROUP *grp;
+ EVP_PKEY *pk;
+ pk = EVP_PKEY_CTX_get0_pkey(pctx);
+ if (!pk)
+ goto err;
+ grp = EC_KEY_get0_group(pk->pkey.ec);
+ ecpeer = EC_KEY_new();
+ if (!ecpeer)
+ goto err;
+ if (!EC_KEY_set_group(ecpeer, grp))
+ goto err;
+ }
+ else
+ {
+ ecpeer = eckey_type2param(atype, aval);
+ if (!ecpeer)
+ goto err;
+ }
+ /* We have parameters now set public key */
+ plen = ASN1_STRING_length(pubkey);
+ p = ASN1_STRING_data(pubkey);
+ if (!p || !plen)
+ goto err;
+ if (!o2i_ECPublicKey(&ecpeer, &p, plen))
+ goto err;
+ pkpeer = EVP_PKEY_new();
+ if (!pkpeer)
+ goto err;
+ EVP_PKEY_set1_EC_KEY(pkpeer, ecpeer);
+ if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0)
+ rv = 1;
+ err:
+ if (ecpeer)
+ EC_KEY_free(ecpeer);
+ if (pkpeer)
+ EVP_PKEY_free(pkpeer);
+ return rv;
+ }
+/* Set KDF parameters based on KDF NID */
+static int ecdh_cms_set_kdf_param(EVP_PKEY_CTX *pctx, int eckdf_nid)
+ {
+ int kdf_nid, kdfmd_nid, cofactor;
+ const EVP_MD *kdf_md;
+ if (eckdf_nid == NID_undef)
+ return 0;
+
+ /* Lookup KDF type, cofactor mode and digest */
+ if (!OBJ_find_sigid_algs(eckdf_nid, &kdfmd_nid, &kdf_nid))
+ return 0;
+
+ if (kdf_nid == NID_dh_std_kdf)
+ cofactor = 0;
+ else if (kdf_nid == NID_dh_cofactor_kdf)
+ cofactor = 1;
+ else return 0;
+
+ if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx, cofactor) <= 0)
+ return 0;
+
+ if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_62) <= 0)
+ return 0;
+
+ kdf_md = EVP_get_digestbynid(kdfmd_nid);
+ if (!kdf_md)
+ return 0;
+
+ if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0)
+ return 0;
+ return 1;
+ }
+
+static int ecdh_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 *der = NULL;
+ int plen, keylen;
+ const EVP_CIPHER *kekcipher;
+ EVP_CIPHER_CTX *kekctx;
+
+ if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm))
+ return 0;
+
+ if (!ecdh_cms_set_kdf_param(pctx, OBJ_obj2nid(alg->algorithm)))
+ {
+ ECerr(EC_F_ECDH_CMS_SET_SHARED_INFO, EC_R_KDF_PARAMETER_ERROR);
+ return 0;
+ }
+
+ if (alg->parameter->type != V_ASN1_SEQUENCE)
+ return 0;
+
+ 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_ecdh_kdf_outlen(pctx, keylen) <= 0)
+ goto err;
+
+ plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen);
+
+ if (!plen)
+ goto err;
+
+ if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, der, plen) <= 0)
+ goto err;
+ der = NULL;
+
+ rv = 1;
+ err:
+ if (kekalg)
+ X509_ALGOR_free(kekalg);
+ if (der)
+ OPENSSL_free(der);
+ return rv;
+ }
+
+static int ecdh_cms_decrypt(CMS_RecipientInfo *ri)
+ {
+ EVP_PKEY_CTX *pctx;
+ pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+ if (!pctx)
+ 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 (!ecdh_cms_set_peerkey(pctx, alg, pubkey))
+ {
+ ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_PEER_KEY_ERROR);
+ return 0;
+ }
+ }
+ /* Set ECDH derivation parameters and initialise unwrap context */
+ if (!ecdh_cms_set_shared_info(pctx, ri))
+ {
+ ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_SHARED_INFO_ERROR);
+ return 0;
+ }
+ return 1;
+ }
+
+static int ecdh_cms_encrypt(CMS_RecipientInfo *ri)
+ {
+ EVP_PKEY_CTX *pctx;
+ EVP_PKEY *pkey;
+ EVP_CIPHER_CTX *ctx;
+ int keylen;
+ X509_ALGOR *talg, *wrap_alg = NULL;
+ ASN1_OBJECT *aoid;
+ ASN1_BIT_STRING *pubkey;
+ ASN1_STRING *wrap_str;
+ ASN1_OCTET_STRING *ukm;
+ unsigned char *penc = NULL;
+ int penclen;
+ int rv = 0;
+ int ecdh_nid, kdf_type, kdf_nid, wrap_nid;
+ const EVP_MD *kdf_md;
+ pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+ if (!pctx)
+ 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))
+ {
+
+ EC_KEY *eckey = pkey->pkey.ec;
+ /* Set the key */
+ unsigned char *p;
+
+ penclen = i2o_ECPublicKey(eckey, NULL);
+ if (penclen <= 0)
+ goto err;
+ penc = OPENSSL_malloc(penclen);
+ if (!penc)
+ goto err;
+ p = penc;
+ penclen = i2o_ECPublicKey(eckey, &p);
+ 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_X9_62_id_ecPublicKey),
+ V_ASN1_UNDEF, NULL);
+ }
+
+ /* See if custom paraneters set */
+ kdf_type = EVP_PKEY_CTX_get_ecdh_kdf_type(pctx);
+ if (kdf_type <= 0)
+ goto err;
+ if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx, &kdf_md))
+ goto err;
+ ecdh_nid = EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx);
+ if (ecdh_nid < 0)
+ goto err;
+ else if (ecdh_nid == 0)
+ ecdh_nid = NID_dh_std_kdf;
+ else if (ecdh_nid == 1)
+ ecdh_nid = NID_dh_cofactor_kdf;
+
+ if (kdf_type == EVP_PKEY_ECDH_KDF_NONE)
+ {
+ kdf_type = EVP_PKEY_ECDH_KDF_X9_62;
+ if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, kdf_type) <= 0)
+ goto err;
+ }
+ else
+ /* Uknown KDF */
+ goto err;
+ if (kdf_md == NULL)
+ {
+ /* Fixme later for better MD */
+ kdf_md = EVP_sha1();
+ if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0)
+ goto err;
+ }
+
+ if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm))
+ goto err;
+
+ /* Lookup NID for KDF+cofactor+digest */
+
+ if (!OBJ_find_sigid_by_algs(&kdf_nid, EVP_MD_type(kdf_md), ecdh_nid))
+ goto err;
+ /* Get wrap NID */
+ ctx = CMS_RecipientInfo_kari_get0_ctx(ri);
+ wrap_nid = EVP_CIPHER_CTX_type(ctx);
+ keylen = EVP_CIPHER_CTX_key_length(ctx);
+
+ /* Package wrap algorithm in an AlgorithmIdentifier */
+
+ wrap_alg = X509_ALGOR_new();
+ if (!wrap_alg)
+ goto err;
+ wrap_alg->algorithm = OBJ_nid2obj(wrap_nid);
+ wrap_alg->parameter = ASN1_TYPE_new();
+ if (!wrap_alg->parameter)
+ 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_ecdh_kdf_outlen(pctx, keylen) <= 0)
+ goto err;
+
+ penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen);
+
+ if (!penclen)
+ goto err;
+
+ if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, penc, penclen) <= 0)
+ goto err;
+ penc = NULL;
+
+ /* Now need to wrap encoding of wrap AlgorithmIdentifier into
+ * parameter of another AlgorithmIdentifier.
+ */
+ penclen = i2d_X509_ALGOR(wrap_alg, &penc);
+ if (!penc || !penclen)
+ goto err;
+ wrap_str = ASN1_STRING_new();
+ if (!wrap_str)
+ goto err;
+ ASN1_STRING_set0(wrap_str, penc, penclen);
+ penc = NULL;
+ X509_ALGOR_set0(talg, OBJ_nid2obj(kdf_nid), V_ASN1_SEQUENCE, wrap_str);
+
+ rv = 1;
+
+ err:
+ if (penc)
+ OPENSSL_free(penc);
+ if (wrap_alg)
+ X509_ALGOR_free(wrap_alg);
+ return rv;
+ }
+
+#endif
projects / openssl.git / blobdiff