+/*
+ * Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/opensslconf.h>
+#ifndef OPENSSL_NO_BLAKE2
+
+# include <openssl/core_numbers.h>
+# include <openssl/core_names.h>
+# include <openssl/params.h>
+
+# include "internal/blake2.h"
+# include "internal/cryptlib.h"
+# include "internal/providercommonerr.h"
+# include "internal/provider_algs.h"
+
+/*
+ * Forward declaration of everything implemented here. This is not strictly
+ * necessary for the compiler, but provides an assurance that the signatures
+ * of the functions in the dispatch table are correct.
+ */
+static OSSL_OP_mac_newctx_fn blake2_mac_new;
+static OSSL_OP_mac_dupctx_fn blake2_mac_dup;
+static OSSL_OP_mac_freectx_fn blake2_mac_free;
+static OSSL_OP_mac_gettable_ctx_params_fn blake2_gettable_ctx_params;
+static OSSL_OP_mac_ctx_get_params_fn blake2_ctx_get_params;
+static OSSL_OP_mac_settable_ctx_params_fn blake2_mac_settable_ctx_params;
+static OSSL_OP_mac_ctx_set_params_fn blake2_mac_ctx_set_params;
+static OSSL_OP_mac_init_fn blake2_mac_init;
+static OSSL_OP_mac_update_fn blake2_mac_update;
+static OSSL_OP_mac_final_fn blake2_mac_final;
+
+struct blake2_mac_data_st {
+ BLAKE2_CTX ctx;
+ BLAKE2_PARAM params;
+ unsigned char key[BLAKE2_KEYBYTES];
+};
+
+static size_t blake2_mac_size(void *vmacctx);
+
+static void *blake2_mac_new(void *unused_provctx)
+{
+ struct blake2_mac_data_st *macctx = OPENSSL_zalloc(sizeof(*macctx));
+
+ if (macctx != NULL) {
+ BLAKE2_PARAM_INIT(&macctx->params);
+ /* ctx initialization is deferred to BLAKE2b_Init() */
+ }
+ return macctx;
+}
+
+static void *blake2_mac_dup(void *vsrc)
+{
+ struct blake2_mac_data_st *dst;
+ struct blake2_mac_data_st *src = vsrc;
+
+ dst = OPENSSL_zalloc(sizeof(*dst));
+ if (dst == NULL)
+ return NULL;
+
+ *dst = *src;
+ return dst;
+}
+
+static void blake2_mac_free(void *vmacctx)
+{
+ struct blake2_mac_data_st *macctx = vmacctx;
+
+ if (macctx != NULL) {
+ OPENSSL_cleanse(macctx->key, sizeof(macctx->key));
+ OPENSSL_free(macctx);
+ }
+}
+
+static int blake2_mac_init(void *vmacctx)
+{
+ struct blake2_mac_data_st *macctx = vmacctx;
+
+ /* Check key has been set */
+ if (macctx->params.key_length == 0) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
+ return 0;
+ }
+
+ return BLAKE2_INIT_KEY(&macctx->ctx, &macctx->params, macctx->key);
+}
+
+static int blake2_mac_update(void *vmacctx,
+ const unsigned char *data, size_t datalen)
+{
+ struct blake2_mac_data_st *macctx = vmacctx;
+
+ return BLAKE2_UPDATE(&macctx->ctx, data, datalen);
+}
+
+static int blake2_mac_final(void *vmacctx,
+ unsigned char *out, size_t *outl,
+ size_t outsize)
+{
+ struct blake2_mac_data_st *macctx = vmacctx;
+
+ return BLAKE2_FINAL(out, &macctx->ctx);
+}
+
+static const OSSL_PARAM known_gettable_ctx_params[] = {
+ OSSL_PARAM_size_t(OSSL_MAC_PARAM_OUTLEN, NULL),
+ OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL), /* Same as "outlen" */
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *blake2_gettable_ctx_params(void)
+{
+ return known_gettable_ctx_params;
+}
+
+static int blake2_ctx_get_params(void *vmacctx, OSSL_PARAM params[])
+{
+ OSSL_PARAM *p;
+
+ if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_OUTLEN)) != NULL
+ || (p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL)
+ return OSSL_PARAM_set_size_t(p, blake2_mac_size(vmacctx));
+
+ return 1;
+}
+
+static const OSSL_PARAM known_settable_ctx_params[] = {
+ OSSL_PARAM_size_t(OSSL_MAC_PARAM_OUTLEN, NULL),
+ OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
+ OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
+ OSSL_PARAM_octet_string(OSSL_MAC_PARAM_CUSTOM, NULL, 0),
+ OSSL_PARAM_octet_string(OSSL_MAC_PARAM_SALT, NULL, 0),
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *blake2_mac_settable_ctx_params()
+{
+ return known_settable_ctx_params;
+}
+
+/*
+ * ALL parameters should be set before init().
+ */
+static int blake2_mac_ctx_set_params(void *vmacctx, const OSSL_PARAM params[])
+{
+ struct blake2_mac_data_st *macctx = vmacctx;
+ const OSSL_PARAM *p;
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_OUTLEN)) != NULL
+ ||
+ (p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
+ size_t size;
+
+ if (!OSSL_PARAM_get_size_t(p, &size)
+ || size < 1
+ || size > BLAKE2_OUTBYTES) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_NOT_XOF_OR_INVALID_LENGTH);
+ return 0;
+ }
+ BLAKE2_PARAM_SET_DIGEST_LENGTH(&macctx->params, (uint8_t)size);
+ }
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
+ size_t len;
+ void *key_p = macctx->key;
+
+ if (!OSSL_PARAM_get_octet_string(p, &key_p, BLAKE2_KEYBYTES, &len)) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
+ return 0;
+ }
+ /* Pad with zeroes at the end */
+ memset(macctx->key + len, 0, BLAKE2_KEYBYTES - len);
+
+ BLAKE2_PARAM_SET_KEY_LENGTH(&macctx->params, (uint8_t)len);
+ }
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_CUSTOM))
+ != NULL) {
+ /*
+ * The OSSL_PARAM API doesn't provide direct pointer use, so we
+ * must handle the OSSL_PARAM structure ourselves here
+ */
+ if (p->data_size > BLAKE2_PERSONALBYTES) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CUSTOM_LENGTH);
+ return 0;
+ }
+ BLAKE2_PARAM_SET_PERSONAL(&macctx->params, p->data, p->data_size);
+ }
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SALT)) != NULL) {
+ /*
+ * The OSSL_PARAM API doesn't provide direct pointer use, so we
+ * must handle the OSSL_PARAM structure ourselves here as well
+ */
+ if (p->data_size > BLAKE2_SALTBYTES) {
+ ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH);
+ return 0;
+ }
+ BLAKE2_PARAM_SET_SALT(&macctx->params, p->data, p->data_size);
+ }
+ return 1;
+}
+
+static size_t blake2_mac_size(void *vmacctx)
+{
+ struct blake2_mac_data_st *macctx = vmacctx;
+
+ return macctx->params.digest_length;
+}
+
+const OSSL_DISPATCH BLAKE2_FUNCTIONS[] = {
+ { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))blake2_mac_new },
+ { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))blake2_mac_dup },
+ { OSSL_FUNC_MAC_FREECTX, (void (*)(void))blake2_mac_free },
+ { OSSL_FUNC_MAC_INIT, (void (*)(void))blake2_mac_init },
+ { OSSL_FUNC_MAC_UPDATE, (void (*)(void))blake2_mac_update },
+ { OSSL_FUNC_MAC_FINAL, (void (*)(void))blake2_mac_final },
+ { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
+ (void (*)(void))blake2_gettable_ctx_params },
+ { OSSL_FUNC_MAC_CTX_GET_PARAMS, (void (*)(void))blake2_ctx_get_params },
+ { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
+ (void (*)(void))blake2_mac_settable_ctx_params },
+ { OSSL_FUNC_MAC_CTX_SET_PARAMS, (void (*)(void))blake2_mac_ctx_set_params },
+ { 0, NULL }
+};
+
+#endif
projects / openssl.git / commitdiff