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ada66e78ef
Use of the low level DH functions has been informally discouraged for a long time. We now formally deprecate them. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11024)
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/*
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* Copyright 2013-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* DH low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include "e_os.h"
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#ifndef OPENSSL_NO_CMS
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# include <string.h>
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# include <openssl/core_names.h>
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# include <openssl/dh.h>
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# include <openssl/evp.h>
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# include <openssl/asn1.h>
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# include <openssl/kdf.h>
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# include <internal/provider.h>
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int DH_KDF_X9_42(unsigned char *out, size_t outlen,
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const unsigned char *Z, size_t Zlen,
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ASN1_OBJECT *key_oid,
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const unsigned char *ukm, size_t ukmlen, const EVP_MD *md)
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{
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int ret = 0, nid;
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EVP_KDF_CTX *kctx = NULL;
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EVP_KDF *kdf = NULL;
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const char *oid_sn;
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OSSL_PARAM params[5], *p = params;
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const char *mdname = EVP_MD_name(md);
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const OSSL_PROVIDER *prov = EVP_MD_provider(md);
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OPENSSL_CTX *provctx = ossl_provider_library_context(prov);
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nid = OBJ_obj2nid(key_oid);
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if (nid == NID_undef)
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return 0;
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oid_sn = OBJ_nid2sn(nid);
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if (oid_sn == NULL)
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return 0;
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kdf = EVP_KDF_fetch(provctx, OSSL_KDF_NAME_X942KDF, NULL);
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if ((kctx = EVP_KDF_CTX_new(kdf)) == NULL)
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goto err;
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
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(char *)mdname, 0);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY,
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(unsigned char *)Z, Zlen);
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if (ukm != NULL)
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_UKM,
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(unsigned char *)ukm, ukmlen);
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_CEK_ALG,
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(char *)oid_sn, 0);
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*p = OSSL_PARAM_construct_end();
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ret = EVP_KDF_CTX_set_params(kctx, params) > 0
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&& EVP_KDF_derive(kctx, out, outlen) > 0;
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err:
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EVP_KDF_CTX_free(kctx);
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EVP_KDF_free(kdf);
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return ret;
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}
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#endif /* OPENSSL_NO_CMS */
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