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2349d7ba57
Also update OBJ_nid2obj.pod to document the possible return values. Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/17005)
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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* Copyright 2013-2021 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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#include "e_os.h"
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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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#include "crypto/dh.h"
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/* Key derivation function from X9.63/SECG */
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int ossl_dh_kdf_X9_42_asn1(unsigned char *out, size_t outlen,
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const unsigned char *Z, size_t Zlen,
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const char *cek_alg,
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const unsigned char *ukm, size_t ukmlen,
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const EVP_MD *md,
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OSSL_LIB_CTX *libctx, const char *propq)
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{
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int ret = 0;
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EVP_KDF_CTX *kctx = NULL;
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EVP_KDF *kdf = NULL;
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OSSL_PARAM params[5], *p = params;
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const char *mdname = EVP_MD_get0_name(md);
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kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_X942KDF_ASN1, propq);
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kctx = EVP_KDF_CTX_new(kdf);
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if (kctx == 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 *)cek_alg, 0);
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*p = OSSL_PARAM_construct_end();
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ret = EVP_KDF_derive(kctx, out, outlen, params) > 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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#if !defined(FIPS_MODULE)
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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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char key_alg[OSSL_MAX_NAME_SIZE];
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const OSSL_PROVIDER *prov = EVP_MD_get0_provider(md);
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OSSL_LIB_CTX *libctx = ossl_provider_libctx(prov);
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if (OBJ_obj2txt(key_alg, sizeof(key_alg), key_oid, 0) <= 0)
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return 0;
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return ossl_dh_kdf_X9_42_asn1(out, outlen, Z, Zlen, key_alg,
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ukm, ukmlen, md, libctx, NULL);
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}
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#endif /* !defined(FIPS_MODULE) */
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