diff options
Diffstat (limited to 'thirdparty/openssl/crypto/dh/dh_ameth.c')
| -rw-r--r-- | thirdparty/openssl/crypto/dh/dh_ameth.c | 957 |
1 files changed, 0 insertions, 957 deletions
diff --git a/thirdparty/openssl/crypto/dh/dh_ameth.c b/thirdparty/openssl/crypto/dh/dh_ameth.c deleted file mode 100644 index 4558283576..0000000000 --- a/thirdparty/openssl/crypto/dh/dh_ameth.c +++ /dev/null @@ -1,957 +0,0 @@ -/* - * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project - * 2006. - */ -/* ==================================================================== - * 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 - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * licensing@OpenSSL.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). - * - */ - -#include <stdio.h> -#include "cryptlib.h" -#include <openssl/x509.h> -#include <openssl/asn1.h> -#include <openssl/dh.h> -#include <openssl/bn.h> -#include "asn1_locl.h" -#ifndef OPENSSL_NO_CMS -# include <openssl/cms.h> -#endif - -extern const EVP_PKEY_ASN1_METHOD dhx_asn1_meth; - -/* - * 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) -{ - if (pkey->ameth == &dhx_asn1_meth) - return d2i_DHxparams(NULL, pp, length); - return d2i_DHparams(NULL, pp, length); -} - -static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) -{ - if (pkey->ameth == &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, X509_PUBKEY *pubkey) -{ - const unsigned char *p, *pm; - int pklen, pmlen; - int ptype; - void *pval; - 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) { - DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); - goto err; - } - - pstr = pval; - pm = pstr->data; - pmlen = pstr->length; - - if (!(dh = d2i_dhp(pkey, &pm, pmlen))) { - DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); - goto err; - } - - if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) { - DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); - goto err; - } - - /* We have parameters now set public key */ - if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { - DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); - goto err; - } - - ASN1_INTEGER_free(public_key); - EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); - return 1; - - err: - if (public_key) - ASN1_INTEGER_free(public_key); - if (dh) - 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) { - DHerr(DH_F_DH_PUB_ENCODE, 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); - goto err; - } - ptype = V_ASN1_SEQUENCE; - - pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); - if (!pub_key) - goto err; - - penclen = i2d_ASN1_INTEGER(pub_key, &penc); - - ASN1_INTEGER_free(pub_key); - - if (penclen <= 0) { - DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); - goto err; - } - - if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), - ptype, str, penc, penclen)) - return 1; - - err: - if (penc) - OPENSSL_free(penc); - if (str) - 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 paramaters, the private key is - * explcitly included and the pubkey must be recalculated. - */ - -static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) -{ - const unsigned char *p, *pm; - int pklen, pmlen; - int ptype; - void *pval; - ASN1_STRING *pstr; - X509_ALGOR *palg; - ASN1_INTEGER *privkey = NULL; - - DH *dh = NULL; - - if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) - return 0; - - X509_ALGOR_get0(NULL, &ptype, &pval, palg); - - if (ptype != V_ASN1_SEQUENCE) - goto decerr; - - if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen))) - goto decerr; - - pstr = pval; - pm = pstr->data; - pmlen = pstr->length; - if (!(dh = d2i_dhp(pkey, &pm, pmlen))) - goto decerr; - /* We have parameters now set private key */ - if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) { - DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); - goto dherr; - } - /* Calculate public key */ - 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; -} - -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) { - DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); - goto err; - } - - params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); - if (params->length <= 0) { - DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); - 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) { - DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); - goto err; - } - - dplen = i2d_ASN1_INTEGER(prkey, &dp); - - ASN1_STRING_clear_free(prkey); - prkey = NULL; - - if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, - V_ASN1_SEQUENCE, params, dp, dplen)) - goto err; - - return 1; - - err: - if (dp != NULL) - OPENSSL_free(dp); - if (params != NULL) - ASN1_STRING_free(params); - if (prkey != NULL) - ASN1_STRING_clear_free(prkey); - return 0; -} - -static void update_buflen(const BIGNUM *b, size_t *pbuflen) -{ - size_t i; - if (!b) - return; - if (*pbuflen < (i = (size_t)BN_num_bytes(b))) - *pbuflen = i; -} - -static int dh_param_decode(EVP_PKEY *pkey, - const unsigned char **pder, int derlen) -{ - DH *dh; - if (!(dh = d2i_dhp(pkey, pder, derlen))) { - DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); - return 0; - } - 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, - ASN1_PCTX *ctx, int ptype) -{ - unsigned char *m = NULL; - int reason = ERR_R_BUF_LIB, ret = 0; - size_t buf_len = 0; - - 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; - - update_buflen(x->p, &buf_len); - - if (buf_len == 0) { - reason = ERR_R_PASSED_NULL_PARAMETER; - goto err; - } - - update_buflen(x->g, &buf_len); - update_buflen(x->q, &buf_len); - update_buflen(x->j, &buf_len); - update_buflen(x->counter, &buf_len); - update_buflen(pub_key, &buf_len); - update_buflen(priv_key, &buf_len); - - if (ptype == 2) - ktype = "DH Private-Key"; - else if (ptype == 1) - ktype = "DH Public-Key"; - else - ktype = "DH Parameters"; - - m = OPENSSL_malloc(buf_len + 10); - if (m == NULL) { - reason = ERR_R_MALLOC_FAILURE; - goto err; - } - - BIO_indent(bp, indent, 128); - if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) - goto err; - indent += 4; - - if (!ASN1_bn_print(bp, "private-key:", priv_key, m, indent)) - goto err; - if (!ASN1_bn_print(bp, "public-key:", pub_key, m, indent)) - goto err; - - if (!ASN1_bn_print(bp, "prime:", x->p, m, indent)) - goto err; - if (!ASN1_bn_print(bp, "generator:", x->g, m, indent)) - goto err; - if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, m, indent)) - goto err; - if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, m, indent)) - goto err; - if (x->seed) { - int i; - BIO_indent(bp, indent, 128); - BIO_puts(bp, "seed:"); - for (i = 0; i < x->seedlen; i++) { - if ((i % 15) == 0) { - if (BIO_puts(bp, "\n") <= 0 - || !BIO_indent(bp, indent + 4, 128)) - goto err; - } - if (BIO_printf(bp, "%02x%s", x->seed[i], - ((i + 1) == x->seedlen) ? "" : ":") <= 0) - goto err; - } - if (BIO_write(bp, "\n", 1) <= 0) - return (0); - } - if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, m, indent)) - goto err; - if (x->length != 0) { - BIO_indent(bp, indent, 128); - if (BIO_printf(bp, "recommended-private-length: %d bits\n", - (int)x->length) <= 0) - goto err; - } - - ret = 1; - if (0) { - err: - DHerr(DH_F_DO_DH_PRINT, reason); - } - if (m != NULL) - OPENSSL_free(m); - return (ret); -} - -static int int_dh_size(const EVP_PKEY *pkey) -{ - return (DH_size(pkey->pkey.dh)); -} - -static int dh_bits(const EVP_PKEY *pkey) -{ - return BN_num_bits(pkey->pkey.dh->p); -} - -static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) -{ - if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || - BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) - return 0; - else if (a->ameth == &dhx_asn1_meth) { - if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) - return 0; - } - return 1; -} - -static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) -{ - BIGNUM *a; - if (src) { - a = BN_dup(src); - if (!a) - return 0; - } else - a = NULL; - if (*dst) - BN_free(*dst); - *dst = a; - return 1; -} - -static int int_dh_param_copy(DH *to, const DH *from, int is_x942) -{ - if (is_x942 == -1) - is_x942 = ! !from->q; - if (!int_dh_bn_cpy(&to->p, from->p)) - return 0; - if (!int_dh_bn_cpy(&to->g, from->g)) - return 0; - if (is_x942) { - if (!int_dh_bn_cpy(&to->q, from->q)) - return 0; - if (!int_dh_bn_cpy(&to->j, from->j)) - return 0; - if (to->seed) { - OPENSSL_free(to->seed); - to->seed = NULL; - to->seedlen = 0; - } - if (from->seed) { - to->seed = BUF_memdup(from->seed, from->seedlen); - if (!to->seed) - return 0; - to->seedlen = from->seedlen; - } - } else - to->length = from->length; - return 1; -} - -DH *DHparams_dup(DH *dh) -{ - DH *ret; - ret = DH_new(); - if (!ret) - 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) -{ - return int_dh_param_copy(to->pkey.dh, from->pkey.dh, - from->ameth == &dhx_asn1_meth); -} - -static int dh_missing_parameters(const EVP_PKEY *a) -{ - if (a->pkey.dh == NULL || a->pkey.dh->p == NULL || a->pkey.dh->g == NULL) - return 1; - return 0; -} - -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, ctx, 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, ctx, 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, ctx, 2); -} - -int DHparams_print(BIO *bp, const DH *x) -{ - return do_dh_print(bp, x, 4, NULL, 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) { -#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; - } - -} - -const EVP_PKEY_ASN1_METHOD 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_param_decode, - dh_param_encode, - dh_missing_parameters, - dh_copy_parameters, - dh_cmp_parameters, - dh_param_print, - 0, - - int_dh_free, - 0 -}; - -const EVP_PKEY_ASN1_METHOD 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_param_decode, - dh_param_encode, - dh_missing_parameters, - dh_copy_parameters, - dh_cmp_parameters, - dh_param_print, - 0, - - int_dh_free, - dh_pkey_ctrl -}; - -#ifndef OPENSSL_NO_CMS - -static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, - X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) -{ - ASN1_OBJECT *aoid; - int atype; - 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) - 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_data(pubkey); - if (!p || !plen) - goto err; - - if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, plen))) { - 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))) { - DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); - goto err; - } - - pkpeer = EVP_PKEY_new(); - if (!pkpeer) - 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: - if (public_key) - ASN1_INTEGER_free(public_key); - if (pkpeer) - EVP_PKEY_free(pkpeer); - if (dhpeer) - 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 = BUF_memdup(ASN1_STRING_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: - if (kekalg) - X509_ALGOR_free(kekalg); - if (dukm) - 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) - 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; - 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) - 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; - pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); - if (!pubk) - 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 paraneters 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) - 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_dh_kdf_outlen(pctx, keylen) <= 0) - goto err; - - if (ukm) { - dukmlen = ASN1_STRING_length(ukm); - dukm = BUF_memdup(ASN1_STRING_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 || !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(NID_id_smime_alg_ESDH), - V_ASN1_SEQUENCE, wrap_str); - - rv = 1; - - err: - if (penc) - OPENSSL_free(penc); - if (wrap_alg) - X509_ALGOR_free(wrap_alg); - return rv; -} - -#endif |