+ mdname = EVP_MD_name(md);
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
+ (char *)mdname, 0);
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
+ (unsigned char *)sec,
+ (size_t)slen);
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+ (void *)seed1, (size_t)seed1_len);
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+ (void *)seed2, (size_t)seed2_len);
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+ (void *)seed3, (size_t)seed3_len);
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+ (void *)seed4, (size_t)seed4_len);
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
+ (void *)seed5, (size_t)seed5_len);
+ *p = OSSL_PARAM_construct_end();
+ if (EVP_KDF_set_ctx_params(kctx, params)
+ && EVP_KDF_derive(kctx, out, olen)) {
+ EVP_KDF_free_ctx(kctx);
+ return 1;