+++ /dev/null
-/*
- * 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 <stdio.h>
-#include "internal/cryptlib.h"
-#include <openssl/x509.h>
-#include <openssl/x509v3.h>
-#include <openssl/evp.h>
-#include <openssl/cmac.h>
-#include "internal/evp_int.h"
-
-/* local CMAC pkey structure */
-
-/* typedef EVP_MAC_IMPL */
-struct evp_mac_impl_st {
- /* tmpcipher and tmpengine are set to NULL after a CMAC_Init call */
- const EVP_CIPHER *tmpcipher; /* cached CMAC cipher */
- const ENGINE *tmpengine; /* cached CMAC cipher engine */
- CMAC_CTX *ctx;
-};
-
-static EVP_MAC_IMPL *cmac_new(void)
-{
- EVP_MAC_IMPL *cctx;
-
- if ((cctx = OPENSSL_zalloc(sizeof(*cctx))) == NULL
- || (cctx->ctx = CMAC_CTX_new()) == NULL) {
- OPENSSL_free(cctx);
- cctx = NULL;
- }
-
- return cctx;
-}
-
-static void cmac_free(EVP_MAC_IMPL *cctx)
-{
- if (cctx != NULL) {
- CMAC_CTX_free(cctx->ctx);
- OPENSSL_free(cctx);
- }
-}
-
-static EVP_MAC_IMPL *cmac_dup(const EVP_MAC_IMPL *csrc)
-{
- EVP_MAC_IMPL *cdst = cmac_new();
-
- if (cdst == NULL)
- return NULL;
-
- if (!CMAC_CTX_copy(cdst->ctx, csrc->ctx)) {
- cmac_free(cdst);
- return NULL;
- }
-
- cdst->tmpengine = csrc->tmpengine;
- cdst->tmpcipher = csrc->tmpcipher;
-
- return cdst;
-}
-
-static size_t cmac_size(EVP_MAC_IMPL *cctx)
-{
- return EVP_CIPHER_CTX_block_size(CMAC_CTX_get0_cipher_ctx(cctx->ctx));
-}
-
-static int cmac_init(EVP_MAC_IMPL *cctx)
-{
- int rv = CMAC_Init(cctx->ctx, NULL, 0, cctx->tmpcipher,
- (ENGINE *)cctx->tmpengine);
- cctx->tmpcipher = NULL;
- cctx->tmpengine = NULL;
-
- return rv;
-}
-
-static int cmac_update(EVP_MAC_IMPL *cctx, const unsigned char *data,
- size_t datalen)
-{
- return CMAC_Update(cctx->ctx, data, datalen);
-}
-
-static int cmac_final(EVP_MAC_IMPL *cctx, unsigned char *out)
-{
- size_t hlen;
-
- return CMAC_Final(cctx->ctx, out, &hlen);
-}
-
-static int cmac_ctrl(EVP_MAC_IMPL *cctx, int cmd, va_list args)
-{
- switch (cmd) {
- case EVP_MAC_CTRL_SET_KEY:
- {
- const unsigned char *key = va_arg(args, const unsigned char *);
- size_t keylen = va_arg(args, size_t);
- int rv = CMAC_Init(cctx->ctx, key, keylen, cctx->tmpcipher,
- (ENGINE *)cctx->tmpengine);
-
- cctx->tmpcipher = NULL;
- cctx->tmpengine = NULL;
-
- return rv;
- }
- break;
- case EVP_MAC_CTRL_SET_CIPHER:
- cctx->tmpcipher = va_arg(args, const EVP_CIPHER *);
- break;
- case EVP_MAC_CTRL_SET_ENGINE:
- cctx->tmpengine = va_arg(args, const ENGINE *);
- break;
- default:
- return -2;
- }
- return 1;
-}
-
-static int cmac_ctrl_int(EVP_MAC_IMPL *hctx, int cmd, ...)
-{
- int rv;
- va_list args;
-
- va_start(args, cmd);
- rv = cmac_ctrl(hctx, cmd, args);
- va_end(args);
-
- return rv;
-}
-
-static int cmac_ctrl_str_cb(void *hctx, int cmd, void *buf, size_t buflen)
-{
- return cmac_ctrl_int(hctx, cmd, buf, buflen);
-}
-
-static int cmac_ctrl_str(EVP_MAC_IMPL *cctx, const char *type,
- const char *value)
-{
- if (!value)
- return 0;
- if (strcmp(type, "cipher") == 0) {
- const EVP_CIPHER *c = EVP_get_cipherbyname(value);
-
- if (c == NULL)
- return 0;
- return cmac_ctrl_int(cctx, EVP_MAC_CTRL_SET_CIPHER, c);
- }
- if (strcmp(type, "key") == 0)
- return EVP_str2ctrl(cmac_ctrl_str_cb, cctx, EVP_MAC_CTRL_SET_KEY,
- value);
- if (strcmp(type, "hexkey") == 0)
- return EVP_hex2ctrl(cmac_ctrl_str_cb, cctx, EVP_MAC_CTRL_SET_KEY,
- value);
- return -2;
-}
-
-const EVP_MAC cmac_meth = {
- EVP_MAC_CMAC,
- cmac_new,
- cmac_dup,
- cmac_free,
- cmac_size,
- cmac_init,
- cmac_update,
- cmac_final,
- cmac_ctrl,
- cmac_ctrl_str
-};
--- /dev/null
+/*
+ * 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_CMAC
+
+# include <openssl/core_numbers.h>
+# include <openssl/core_names.h>
+# include <openssl/params.h>
+# include <openssl/engine.h>
+# include <openssl/evp.h>
+# include <openssl/cmac.h>
+
+# include "internal/provider_algs.h"
+# include "internal/provider_ctx.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 cmac_new;
+static OSSL_OP_mac_dupctx_fn cmac_dup;
+static OSSL_OP_mac_freectx_fn cmac_free;
+static OSSL_OP_mac_gettable_ctx_params_fn cmac_gettable_ctx_params;
+static OSSL_OP_mac_ctx_get_params_fn cmac_ctx_get_params;
+static OSSL_OP_mac_settable_ctx_params_fn cmac_settable_ctx_params;
+static OSSL_OP_mac_ctx_set_params_fn cmac_ctx_set_params;
+static OSSL_OP_mac_init_fn cmac_init;
+static OSSL_OP_mac_update_fn cmac_update;
+static OSSL_OP_mac_final_fn cmac_final;
+
+/* local CMAC data */
+
+struct cmac_data_st {
+ void *provctx;
+ CMAC_CTX *ctx;
+
+ /*
+ * References to the underlying cipher implementation. tmpcipher
+ * caches the cipher, always. alloc_cipher only holds a reference
+ * to an explicitly fetched cipher.
+ * tmpcipher is cleared after a CMAC_Init call.
+ */
+ const EVP_CIPHER *tmpcipher; /* cached CMAC cipher */
+ EVP_CIPHER *alloc_cipher; /* fetched CMAC cipher */
+
+ /*
+ * Conditions for legacy EVP_CIPHER uses.
+ * tmpengine is cleared after a CMAC_Init call.
+ */
+ ENGINE *tmpengine; /* CMAC cipher engine (legacy) */
+};
+
+static void *cmac_new(void *provctx)
+{
+ struct cmac_data_st *macctx;
+
+ if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
+ || (macctx->ctx = CMAC_CTX_new()) == NULL) {
+ OPENSSL_free(macctx);
+ macctx = NULL;
+ }
+ macctx->provctx = provctx;
+
+ return macctx;
+}
+
+static void cmac_free(void *vmacctx)
+{
+ struct cmac_data_st *macctx = vmacctx;
+
+ if (macctx != NULL) {
+ CMAC_CTX_free(macctx->ctx);
+ EVP_CIPHER_meth_free(macctx->alloc_cipher);
+ OPENSSL_free(macctx);
+ }
+}
+
+static void *cmac_dup(void *vsrc)
+{
+ struct cmac_data_st *src = vsrc;
+ struct cmac_data_st *dst = cmac_new(src->provctx);
+
+ if (!CMAC_CTX_copy(dst->ctx, src->ctx)) {
+ cmac_free(dst);
+ return NULL;
+ }
+
+ if (src->alloc_cipher != NULL && !EVP_CIPHER_up_ref(src->alloc_cipher)) {
+ cmac_free(dst);
+ return NULL;
+ }
+
+ dst->tmpengine = src->tmpengine;
+ dst->tmpcipher = src->tmpcipher;
+ dst->alloc_cipher = src->alloc_cipher;
+ return dst;
+}
+
+static size_t cmac_size(void *vmacctx)
+{
+ struct cmac_data_st *macctx = vmacctx;
+
+ return EVP_CIPHER_CTX_block_size(CMAC_CTX_get0_cipher_ctx(macctx->ctx));
+}
+
+static int cmac_init(void *vmacctx)
+{
+ struct cmac_data_st *macctx = vmacctx;
+ int rv = CMAC_Init(macctx->ctx, NULL, 0, macctx->tmpcipher,
+ (ENGINE *)macctx->tmpengine);
+
+ macctx->tmpcipher = NULL;
+ macctx->tmpengine = NULL;
+
+ return rv;
+}
+
+static int cmac_update(void *vmacctx, const unsigned char *data,
+ size_t datalen)
+{
+ struct cmac_data_st *macctx = vmacctx;
+
+ return CMAC_Update(macctx->ctx, data, datalen);
+}
+
+static int cmac_final(void *vmacctx, unsigned char *out, size_t *outl,
+ size_t outsize)
+{
+ struct cmac_data_st *macctx = vmacctx;
+
+ return CMAC_Final(macctx->ctx, out, outl);
+}
+
+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 *cmac_gettable_ctx_params(void)
+{
+ return known_gettable_ctx_params;
+}
+
+static int cmac_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, cmac_size(vmacctx));
+
+ return 1;
+}
+
+static const OSSL_PARAM known_settable_ctx_params[] = {
+ /* "algorithm" and "cipher" are the same parameter */
+ OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_ALGORITHM, NULL, 0),
+ OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_CIPHER, NULL, 0),
+ OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_ENGINE, NULL, 0),
+ OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_PROPERTIES, NULL, 0),
+ OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *cmac_settable_ctx_params(void)
+{
+ return known_settable_ctx_params;
+}
+
+/*
+ * ALL parameters should be set before init().
+ */
+static int cmac_ctx_set_params(void *vmacctx, const OSSL_PARAM params[])
+{
+ struct cmac_data_st *macctx = vmacctx;
+ const OSSL_PARAM *p;
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_CIPHER)) != NULL
+ || ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_ALGORITHM))
+ != NULL)) {
+ if (p->data_type != OSSL_PARAM_UTF8_STRING)
+ return 0;
+
+ {
+ const char *algoname = p->data;
+ const char *propquery = NULL;
+
+#ifndef FIPS_MODE /* Inside the FIPS module, we don't support engines */
+ ENGINE_finish(macctx->tmpengine);
+ macctx->tmpengine = NULL;
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_ENGINE))
+ != NULL) {
+ if (p->data_type != OSSL_PARAM_UTF8_STRING)
+ return 0;
+
+ macctx->tmpengine = ENGINE_by_id(p->data);
+ if (macctx->tmpengine == NULL)
+ return 0;
+ }
+#endif
+ if ((p = OSSL_PARAM_locate_const(params,
+ OSSL_MAC_PARAM_PROPERTIES))
+ != NULL) {
+ if (p->data_type != OSSL_PARAM_UTF8_STRING)
+ return 0;
+
+ propquery = p->data;
+ }
+
+ EVP_CIPHER_meth_free(macctx->alloc_cipher);
+
+ macctx->tmpcipher = macctx->alloc_cipher =
+ EVP_CIPHER_fetch(PROV_LIBRARY_CONTEXT_OF(macctx->provctx),
+ algoname, propquery);
+
+#ifndef FIPS_MODE /* Inside the FIPS module, we don't support legacy digests */
+ /* TODO(3.0) BEGIN legacy stuff, to be removed */
+ if (macctx->tmpcipher == NULL)
+ macctx->tmpcipher = EVP_get_cipherbyname(algoname);
+ /* TODO(3.0) END of legacy stuff */
+#endif
+
+ if (macctx->tmpcipher == NULL)
+ return 0;
+ }
+ }
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
+ if (p->data_type != OSSL_PARAM_OCTET_STRING)
+ return 0;
+
+ if (!CMAC_Init(macctx->ctx, p->data, p->data_size,
+ macctx->tmpcipher, macctx->tmpengine))
+ return 0;
+
+ macctx->tmpcipher = NULL;
+ macctx->tmpengine = NULL;
+ }
+ return 1;
+}
+
+const OSSL_DISPATCH cmac_functions[] = {
+ { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))cmac_new },
+ { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))cmac_dup },
+ { OSSL_FUNC_MAC_FREECTX, (void (*)(void))cmac_free },
+ { OSSL_FUNC_MAC_INIT, (void (*)(void))cmac_init },
+ { OSSL_FUNC_MAC_UPDATE, (void (*)(void))cmac_update },
+ { OSSL_FUNC_MAC_FINAL, (void (*)(void))cmac_final },
+ { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
+ (void (*)(void))cmac_gettable_ctx_params },
+ { OSSL_FUNC_MAC_CTX_GET_PARAMS, (void (*)(void))cmac_ctx_get_params },
+ { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
+ (void (*)(void))cmac_settable_ctx_params },
+ { OSSL_FUNC_MAC_CTX_SET_PARAMS, (void (*)(void))cmac_ctx_set_params },
+ { 0, NULL }
+};
+
+#endif
projects / oweals / openssl.git / commitdiff