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hkdf: implement ctx dup operation

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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 16:51:24 +11:00
parent 0a10f71d30
commit 95bd5ff659
1 changed files with 33 additions and 0 deletions
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33
providers/implementations/kdfs/hkdf.c
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@ -34,6 +34,7 @@
#define HKDF_MAXBUF 2048
static OSSL_FUNC_kdf_newctx_fn kdf_hkdf_new;
static OSSL_FUNC_kdf_dupctx_fn kdf_hkdf_dup;
static OSSL_FUNC_kdf_freectx_fn kdf_hkdf_free;
static OSSL_FUNC_kdf_reset_fn kdf_hkdf_reset;
static OSSL_FUNC_kdf_derive_fn kdf_hkdf_derive;
@ -126,6 +127,36 @@ static void kdf_hkdf_reset(void *vctx)
ctx->provctx = provctx;
}
static void *kdf_hkdf_dup(void *vctx)
{
const KDF_HKDF *src = (const KDF_HKDF *)vctx;
KDF_HKDF *dest;
dest = kdf_hkdf_new(src->provctx);
if (dest != NULL) {
if (!ossl_prov_memdup(src->salt, src->salt_len, &dest->salt,
&dest->salt_len)
|| !ossl_prov_memdup(src->key, src->key_len,
&dest->key , &dest->key_len)
|| !ossl_prov_memdup(src->prefix, src->prefix_len,
&dest->prefix, &dest->prefix_len)
|| !ossl_prov_memdup(src->label, src->label_len,
&dest->label, &dest->label_len)
|| !ossl_prov_memdup(src->data, src->data_len,
&dest->data, &dest->data_len)
|| !ossl_prov_digest_copy(&dest->digest, &src->digest))
goto err;
memcpy(dest->info, src->info, sizeof(dest->info));
dest->info_len = src->info_len;
dest->mode = src->mode;
}
return dest;
err:
kdf_hkdf_free(dest);
return NULL;
}
static size_t kdf_hkdf_size(KDF_HKDF *ctx)
{
int sz;
@ -313,6 +344,7 @@ static const OSSL_PARAM *kdf_hkdf_gettable_ctx_params(ossl_unused void *ctx,
const OSSL_DISPATCH ossl_kdf_hkdf_functions[] = {
{ OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_hkdf_new },
{ OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_hkdf_dup },
{ OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_hkdf_free },
{ OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_hkdf_reset },
{ OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_hkdf_derive },
@ -728,6 +760,7 @@ static const OSSL_PARAM *kdf_tls1_3_settable_ctx_params(ossl_unused void *ctx,
const OSSL_DISPATCH ossl_kdf_tls1_3_kdf_functions[] = {
{ OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_hkdf_new },
{ OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_hkdf_dup },
{ OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_hkdf_free },
{ OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_hkdf_reset },
{ OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_tls1_3_derive },