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krb5kdf: implement ctx dup operation 

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/17572)
This commit is contained in:
Pauli 2022-01-24 17:02:29 +11:00
parent d54c52c28e
commit 4c1a841c3d
1 changed files with 23 additions and 0 deletions
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23
providers/implementations/kdfs/krb5kdf.c
View File

@ -34,6 +34,7 @@
/* KRB5 KDF defined in RFC 3961, Section 5.1 */
static OSSL_FUNC_kdf_newctx_fn krb5kdf_new;
static OSSL_FUNC_kdf_dupctx_fn krb5kdf_dup;
static OSSL_FUNC_kdf_freectx_fn krb5kdf_free;
static OSSL_FUNC_kdf_reset_fn krb5kdf_reset;
static OSSL_FUNC_kdf_derive_fn krb5kdf_derive;
@ -102,6 +103,27 @@ static int krb5kdf_set_membuf(unsigned char **dst, size_t *dst_len,
return OSSL_PARAM_get_octet_string(p, (void **)dst, 0, dst_len);
}
static void *krb5kdf_dup(void *vctx)
{
const KRB5KDF_CTX *src = (const KRB5KDF_CTX *)vctx;
KRB5KDF_CTX *dest;
dest = krb5kdf_new(src->provctx);
if (dest != NULL) {
if (!ossl_prov_memdup(src->key, src->key_len,
&dest->key, &dest->key_len)
|| !ossl_prov_memdup(src->constant, src->constant_len,
&dest->constant , &dest->constant_len)
|| !ossl_prov_cipher_copy(&dest->cipher, &src->cipher))
goto err;
}
return dest;
err:
krb5kdf_free(dest);
return NULL;
}
static int krb5kdf_derive(void *vctx, unsigned char *key, size_t keylen,
const OSSL_PARAM params[])
{
@ -198,6 +220,7 @@ static const OSSL_PARAM *krb5kdf_gettable_ctx_params(ossl_unused void *ctx,
const OSSL_DISPATCH ossl_kdf_krb5kdf_functions[] = {
{ OSSL_FUNC_KDF_NEWCTX, (void(*)(void))krb5kdf_new },
{ OSSL_FUNC_KDF_DUPCTX, (void(*)(void))krb5kdf_dup },
{ OSSL_FUNC_KDF_FREECTX, (void(*)(void))krb5kdf_free },
{ OSSL_FUNC_KDF_RESET, (void(*)(void))krb5kdf_reset },
{ OSSL_FUNC_KDF_DERIVE, (void(*)(void))krb5kdf_derive },