-/* crypto/dh/dh_kdf.c */
/*
- * Written by Stephen Henson for the OpenSSL project.
- */
-/* ====================================================================
- * Copyright (c) 2013 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/)"
+ * Copyright 2013-2019 The OpenSSL Project Authors. All Rights Reserved.
*
- * 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
- * openssl-core@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.
- * ====================================================================
+ * 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
*/
-#include <string.h>
-#include <openssl/dh.h>
-#include <openssl/evp.h>
-#include <openssl/asn1.h>
-#include <openssl/cms.h>
-
-
-/* Key derivation from X9.42/RFC2631 */
-
-#define DH_KDF_MAX (1L << 30)
-
-/* Skip past an ASN1 structure: for OBJECT skip content octets too */
-
-static int skip_asn1(unsigned char **pp, long *plen, int exptag)
- {
- const unsigned char *q = *pp;
- int i, tag, xclass;
- long tmplen;
- i = ASN1_get_object(&q, &tmplen, &tag, &xclass, *plen);
- if (i & 0x80)
- return 0;
- if (tag != exptag || xclass != V_ASN1_UNIVERSAL)
- return 0;
- if (tag == V_ASN1_OBJECT)
- q += tmplen;
- *plen -= q - *pp;
- *pp = (unsigned char *)q;
- return 1;
- }
-
-/* Encode the DH shared info structure, return an offset to the counter
- * value so we can update the structure without reencoding it.
- */
-
-
-static int dh_sharedinfo_encode(unsigned char **pder, unsigned char **pctr,
- ASN1_OBJECT *key_oid, size_t outlen,
- const unsigned char *ukm, size_t ukmlen)
- {
- unsigned char *p;
- int derlen;
- long tlen;
- /* "magic" value to check offset is sane */
- static unsigned char ctr[4] = {0xF3, 0x17, 0x22, 0x53};
- X509_ALGOR atmp;
- ASN1_OCTET_STRING ctr_oct, ukm_oct, *pukm_oct;
- ASN1_TYPE ctr_atype;
- if (ukmlen > DH_KDF_MAX || outlen > DH_KDF_MAX)
- return 0;
- ctr_oct.data = ctr;
- ctr_oct.length = 4;
- ctr_oct.flags = 0;
- ctr_oct.type = V_ASN1_OCTET_STRING;
- ctr_atype.type = V_ASN1_OCTET_STRING;
- ctr_atype.value.octet_string = &ctr_oct;
- atmp.algorithm = key_oid;
- atmp.parameter = &ctr_atype;
- if (ukm)
- {
- ukm_oct.type = V_ASN1_OCTET_STRING;
- ukm_oct.flags = 0;
- ukm_oct.data = (unsigned char *)ukm;
- ukm_oct.length = ukmlen;
- pukm_oct = &ukm_oct;
- }
- else
- pukm_oct = NULL;
- derlen = CMS_SharedInfo_encode(pder, &atmp, pukm_oct, outlen);
- if (derlen <= 0)
- return 0;
- p = *pder;
- tlen = derlen;
- if (!skip_asn1(&p, &tlen, V_ASN1_SEQUENCE))
- return 0;
- if (!skip_asn1(&p, &tlen, V_ASN1_SEQUENCE))
- return 0;
- if (!skip_asn1(&p, &tlen, V_ASN1_OBJECT))
- return 0;
- if (!skip_asn1(&p, &tlen, V_ASN1_OCTET_STRING))
- return 0;
- if (memcmp(p, ctr, 4))
- return 0;
- *pctr = p;
- return derlen;
- }
-
-int DH_KDF_X9_42(unsigned char *out, size_t outlen,
- const unsigned char *Z, size_t Zlen,
- ASN1_OBJECT *key_oid,
- const unsigned char *ukm, size_t ukmlen,
- const EVP_MD *md)
- {
- EVP_MD_CTX mctx;
- int rv = 0;
- unsigned int i;
- size_t mdlen;
- unsigned char *der = NULL, *ctr;
- int derlen;
- if (Zlen > DH_KDF_MAX)
- return 0;
- mdlen = EVP_MD_size(md);
- EVP_MD_CTX_init(&mctx);
- derlen = dh_sharedinfo_encode(&der, &ctr, key_oid, outlen,
- ukm, ukmlen);
- if (derlen == 0)
- goto err;
- for (i = 1;;i++)
- {
- unsigned char mtmp[EVP_MAX_MD_SIZE];
- EVP_DigestInit_ex(&mctx, md, NULL);
- if (!EVP_DigestUpdate(&mctx, Z, Zlen))
- goto err;
- ctr[3] = i & 0xFF;
- ctr[2] = (i >> 8) & 0xFF;
- ctr[1] = (i >> 16) & 0xFF;
- ctr[0] = (i >> 24) & 0xFF;
- if (!EVP_DigestUpdate(&mctx, der, derlen))
- goto err;
- if (outlen >= mdlen)
- {
- if (!EVP_DigestFinal(&mctx, out, NULL))
- goto err;
- outlen -= mdlen;
- if (outlen == 0)
- break;
- out += mdlen;
- }
- else
- {
- if (!EVP_DigestFinal(&mctx, mtmp, NULL))
- goto err;
- memcpy(out, mtmp, outlen);
- OPENSSL_cleanse(mtmp, mdlen);
- break;
- }
- }
- rv = 1;
- err:
- if (der)
- OPENSSL_free(der);
- EVP_MD_CTX_cleanup(&mctx);
- return rv;
- }
-
+#include "e_os.h"
+
+#ifndef OPENSSL_NO_CMS
+# include <string.h>
+# include <openssl/core_names.h>
+# include <openssl/dh.h>
+# include <openssl/evp.h>
+# include <openssl/asn1.h>
+# include <openssl/kdf.h>
+# include <internal/provider.h>
+
+int DH_KDF_X9_42(unsigned char *out, size_t outlen,
+ const unsigned char *Z, size_t Zlen,
+ ASN1_OBJECT *key_oid,
+ const unsigned char *ukm, size_t ukmlen, const EVP_MD *md)
+{
+ int ret = 0, nid;
+ EVP_KDF_CTX *kctx = NULL;
+ EVP_KDF *kdf = NULL;
+ const char *oid_sn;
+ OSSL_PARAM params[5], *p = params;
+ const char *mdname = EVP_MD_name(md);
+ const OSSL_PROVIDER *prov = EVP_MD_provider(md);
+ OPENSSL_CTX *provctx = ossl_provider_library_context(prov);
+
+ nid = OBJ_obj2nid(key_oid);
+ if (nid == NID_undef)
+ return 0;
+ oid_sn = OBJ_nid2sn(nid);
+ if (oid_sn == NULL)
+ return 0;
+
+ kdf = EVP_KDF_fetch(provctx, SN_x942kdf, NULL);
+ if ((kctx = EVP_KDF_CTX_new(kdf)) == NULL)
+ goto err;
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
+ (char *)mdname, strlen(mdname) + 1);
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY,
+ (unsigned char *)Z, Zlen);
+ if (ukm != NULL)
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_UKM,
+ (unsigned char *)ukm, ukmlen);
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_CEK_ALG,
+ (char *)oid_sn, strlen(oid_sn) + 1);
+ *p = OSSL_PARAM_construct_end();
+ ret = EVP_KDF_CTX_set_params(kctx, params) > 0
+ && EVP_KDF_derive(kctx, out, outlen) > 0;
+err:
+ EVP_KDF_CTX_free(kctx);
+ EVP_KDF_free(kdf);
+ return ret;
+}
+#endif /* OPENSSL_NO_CMS */
projects / openssl.git / blobdiff