diff options
Diffstat (limited to 'lib/nettle/mac.c')
| -rw-r--r-- | lib/nettle/mac.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/nettle/mac.c b/lib/nettle/mac.c index 249ff2e2d7..90789d876f 100644 --- a/lib/nettle/mac.c +++ b/lib/nettle/mac.c @@ -324,6 +324,22 @@ static int wrap_nettle_mac_init(gnutls_mac_algorithm_t algo, void **_ctx) return 0; } +static void *wrap_nettle_mac_copy(const void *_ctx) +{ + const struct nettle_mac_ctx *ctx = _ctx; + struct nettle_mac_ctx *new_ctx; + ptrdiff_t off = (uint8_t *)ctx->ctx_ptr - (uint8_t *)(&ctx->ctx); + + new_ctx = gnutls_calloc(1, sizeof(struct nettle_mac_ctx)); + if (new_ctx == NULL) + return NULL; + + memcpy(new_ctx, ctx, sizeof(*ctx)); + new_ctx->ctx_ptr = (uint8_t *)&new_ctx->ctx + off; + + return new_ctx; +} + static int wrap_nettle_mac_set_key(void *_ctx, const void *key, size_t keylen) { @@ -641,6 +657,7 @@ gnutls_crypto_mac_st _gnutls_mac_ops = { .deinit = wrap_nettle_mac_deinit, .fast = wrap_nettle_mac_fast, .exists = wrap_nettle_mac_exists, + .copy = wrap_nettle_mac_copy, }; gnutls_crypto_digest_st _gnutls_digest_ops = { |