+++ /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 <stdlib.h>
-#include <openssl/evp.h>
-#include "internal/cryptlib.h"
-#include "internal/evp_int.h"
-
-/* typedef EVP_MAC_IMPL */
-struct evp_mac_impl_st {
- EVP_CIPHER *cipher; /* Cache GCM cipher */
- EVP_CIPHER_CTX *ctx; /* Cipher context */
- ENGINE *engine; /* Engine implementating the algorithm */
-};
-
-static void gmac_free(EVP_MAC_IMPL *gctx)
-{
- if (gctx != NULL) {
- EVP_CIPHER_CTX_free(gctx->ctx);
- OPENSSL_free(gctx);
- }
-}
-
-static EVP_MAC_IMPL *gmac_new(void)
-{
- EVP_MAC_IMPL *gctx;
-
- if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) == NULL
- || (gctx->ctx = EVP_CIPHER_CTX_new()) == NULL) {
- gmac_free(gctx);
- return NULL;
- }
- return gctx;
-}
-
-static EVP_MAC_IMPL *gmac_dup(const EVP_MAC_IMPL *gsrc)
-{
- EVP_MAC_IMPL *gdst;
-
- gdst = gmac_new();
- if (gdst == NULL)
- return NULL;
-
- if (!EVP_CIPHER_CTX_copy(gdst->ctx, gsrc->ctx)) {
- gmac_free(gdst);
- return NULL;
- }
-
- gdst->cipher = gsrc->cipher;
- gdst->engine = gsrc->engine;
-
- return gdst;
-}
-
-static size_t gmac_size(EVP_MAC_IMPL *gctx)
-{
- return EVP_GCM_TLS_TAG_LEN;
-}
-
-static int gmac_init(EVP_MAC_IMPL *gctx)
-{
- return 1;
-}
-
-static int gmac_update(EVP_MAC_IMPL *gctx, const unsigned char *data,
- size_t datalen)
-{
- EVP_CIPHER_CTX *ctx = gctx->ctx;
- int outlen;
-
- while (datalen > INT_MAX) {
- if (!EVP_EncryptUpdate(ctx, NULL, &outlen, data, INT_MAX))
- return 0;
- data += INT_MAX;
- datalen -= INT_MAX;
- }
- return EVP_EncryptUpdate(ctx, NULL, &outlen, data, datalen);
-}
-
-static int gmac_final(EVP_MAC_IMPL *gctx, unsigned char *out)
-{
- int hlen;
-
- if (!EVP_EncryptFinal_ex(gctx->ctx, out, &hlen)
- || !EVP_CIPHER_CTX_ctrl(gctx->ctx, EVP_CTRL_AEAD_GET_TAG,
- gmac_size(gctx), out))
- return 0;
- return 1;
-}
-
-static int gmac_ctrl(EVP_MAC_IMPL *gctx, int cmd, va_list args)
-{
- const unsigned char *p;
- size_t len;
- EVP_CIPHER_CTX *ctx = gctx->ctx;
- const EVP_CIPHER *cipher;
- ENGINE *engine;
-
- switch (cmd) {
- case EVP_MAC_CTRL_SET_CIPHER:
- cipher = va_arg(args, const EVP_CIPHER *);
- if (cipher == NULL)
- return 0;
- if (EVP_CIPHER_mode(cipher) != EVP_CIPH_GCM_MODE) {
- EVPerr(EVP_F_GMAC_CTRL, EVP_R_CIPHER_NOT_GCM_MODE);
- return 0;
- }
- return EVP_EncryptInit_ex(ctx, cipher, NULL, NULL, NULL);
-
- case EVP_MAC_CTRL_SET_KEY:
- p = va_arg(args, const unsigned char *);
- len = va_arg(args, size_t);
- if (len != (size_t)EVP_CIPHER_CTX_key_length(ctx)) {
- EVPerr(EVP_F_GMAC_CTRL, EVP_R_INVALID_KEY_LENGTH);
- return 0;
- }
- return EVP_EncryptInit_ex(ctx, NULL, NULL, p, NULL);
-
- case EVP_MAC_CTRL_SET_IV:
- p = va_arg(args, const unsigned char *);
- len = va_arg(args, size_t);
- return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, len, NULL)
- && EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, p);
-
- case EVP_MAC_CTRL_SET_ENGINE:
- engine = va_arg(args, ENGINE *);
- return EVP_EncryptInit_ex(ctx, NULL, engine, NULL, NULL);
-
- default:
- return -2;
- }
-}
-
-static int gmac_ctrl_int(EVP_MAC_IMPL *gctx, int cmd, ...)
-{
- int rv;
- va_list args;
-
- va_start(args, cmd);
- rv = gmac_ctrl(gctx, cmd, args);
- va_end(args);
-
- return rv;
-}
-
-static int gmac_ctrl_str_cb(void *gctx, int cmd, void *buf, size_t buflen)
-{
- return gmac_ctrl_int(gctx, cmd, buf, buflen);
-}
-
-static int gmac_ctrl_str(EVP_MAC_IMPL *gctx, 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 gmac_ctrl_int(gctx, EVP_MAC_CTRL_SET_CIPHER, c);
- }
- if (strcmp(type, "key") == 0)
- return EVP_str2ctrl(gmac_ctrl_str_cb, gctx, EVP_MAC_CTRL_SET_KEY,
- value);
- if (strcmp(type, "hexkey") == 0)
- return EVP_hex2ctrl(gmac_ctrl_str_cb, gctx, EVP_MAC_CTRL_SET_KEY,
- value);
- if (strcmp(type, "iv") == 0)
- return EVP_str2ctrl(gmac_ctrl_str_cb, gctx, EVP_MAC_CTRL_SET_IV,
- value);
- if (strcmp(type, "hexiv") == 0)
- return EVP_hex2ctrl(gmac_ctrl_str_cb, gctx, EVP_MAC_CTRL_SET_IV,
- value);
- return -2;
-}
-
-const EVP_MAC gmac_meth = {
- EVP_MAC_GMAC,
- gmac_new,
- gmac_dup,
- gmac_free,
- gmac_size,
- gmac_init,
- gmac_update,
- gmac_final,
- gmac_ctrl,
- gmac_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 <stdlib.h>
+#include <openssl/core_numbers.h>
+#include <openssl/core_names.h>
+#include <openssl/params.h>
+#include <openssl/engine.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
+
+#include "internal/providercommonerr.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 gmac_new;
+static OSSL_OP_mac_dupctx_fn gmac_dup;
+static OSSL_OP_mac_freectx_fn gmac_free;
+static OSSL_OP_mac_gettable_params_fn gmac_gettable_params;
+static OSSL_OP_mac_get_params_fn gmac_get_params;
+static OSSL_OP_mac_settable_ctx_params_fn gmac_settable_ctx_params;
+static OSSL_OP_mac_ctx_set_params_fn gmac_ctx_set_params;
+static OSSL_OP_mac_init_fn gmac_init;
+static OSSL_OP_mac_update_fn gmac_update;
+static OSSL_OP_mac_final_fn gmac_final;
+
+/* local GMAC pkey structure */
+
+struct gmac_data_st {
+ void *provctx;
+ EVP_CIPHER_CTX *ctx; /* Cipher context */
+
+ /*
+ * References to the underlying cipher implementation. |cipher| caches
+ * the cipher, always. |alloc_cipher| only holds a reference to an
+ * explicitly fetched cipher.
+ * |cipher| is cleared after a CMAC_Init call.
+ */
+ const EVP_CIPHER *cipher; /* Cache GCM cipher */
+ EVP_CIPHER *alloc_cipher; /* Fetched cipher */
+
+ /*
+ * Conditions for legacy EVP_CIPHER uses.
+ */
+ ENGINE *engine; /* Engine implementing the algorithm */
+};
+
+static size_t gmac_size(void);
+
+static void gmac_free(void *vmacctx)
+{
+ struct gmac_data_st *macctx = vmacctx;
+
+ if (macctx != NULL) {
+ EVP_CIPHER_CTX_free(macctx->ctx);
+ EVP_CIPHER_meth_free(macctx->alloc_cipher);
+ OPENSSL_free(macctx);
+ }
+}
+
+static void *gmac_new(void *provctx)
+{
+ struct gmac_data_st *macctx;
+
+ if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
+ || (macctx->ctx = EVP_CIPHER_CTX_new()) == NULL) {
+ gmac_free(macctx);
+ return NULL;
+ }
+ macctx->provctx = provctx;
+
+ return macctx;
+}
+
+static void *gmac_dup(void *vsrc)
+{
+ struct gmac_data_st *src = vsrc;
+ struct gmac_data_st *dst = gmac_new(src->provctx);
+
+ if (dst == NULL)
+ return NULL;
+
+ if (!EVP_CIPHER_CTX_copy(dst->ctx, src->ctx)
+ || (src->alloc_cipher != NULL
+ && !EVP_CIPHER_up_ref(src->alloc_cipher))) {
+ gmac_free(dst);
+ return NULL;
+ }
+
+ dst->cipher = src->cipher;
+ dst->alloc_cipher = src->alloc_cipher;
+ dst->engine = src->engine;
+ return dst;
+}
+
+static int gmac_init(void *vmacctx)
+{
+ return 1;
+}
+
+static int gmac_update(void *vmacctx, const unsigned char *data,
+ size_t datalen)
+{
+ struct gmac_data_st *macctx = vmacctx;
+ EVP_CIPHER_CTX *ctx = macctx->ctx;
+ int outlen;
+
+ while (datalen > INT_MAX) {
+ if (!EVP_EncryptUpdate(ctx, NULL, &outlen, data, INT_MAX))
+ return 0;
+ data += INT_MAX;
+ datalen -= INT_MAX;
+ }
+ return EVP_EncryptUpdate(ctx, NULL, &outlen, data, datalen);
+}
+
+static int gmac_final(void *vmacctx, unsigned char *out, size_t *outl,
+ size_t outsize)
+{
+ struct gmac_data_st *macctx = vmacctx;
+ int hlen = 0;
+
+ if (!EVP_EncryptFinal_ex(macctx->ctx, out, &hlen))
+ return 0;
+
+ /* TODO(3.0) Use params */
+ hlen = gmac_size();
+ if (!EVP_CIPHER_CTX_ctrl(macctx->ctx, EVP_CTRL_AEAD_GET_TAG,
+ hlen, out))
+ return 0;
+
+ *outl = hlen;
+ return 1;
+}
+
+static size_t gmac_size(void)
+{
+ return EVP_GCM_TLS_TAG_LEN;
+}
+
+static const OSSL_PARAM known_gettable_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 *gmac_gettable_params(void)
+{
+ return known_gettable_params;
+}
+
+static int gmac_get_params(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, gmac_size());
+
+ 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_octet_string(OSSL_MAC_PARAM_IV, NULL, 0),
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *gmac_settable_ctx_params(void)
+{
+ return known_settable_ctx_params;
+}
+
+/*
+ * ALL parameters should be set before init().
+ */
+static int gmac_ctx_set_params(void *vmacctx, const OSSL_PARAM params[])
+{
+ struct gmac_data_st *macctx = vmacctx;
+ EVP_CIPHER_CTX *ctx = macctx->ctx;
+ 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->engine);
+ macctx->engine = NULL;
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_ENGINE))
+ != NULL) {
+ if (p->data_type != OSSL_PARAM_UTF8_STRING)
+ return 0;
+
+ macctx->engine = ENGINE_by_id(p->data);
+ if (macctx->engine == 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->cipher = macctx->alloc_cipher = NULL;
+
+ macctx->cipher = 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 ciphers */
+ /* TODO(3.0) BEGIN legacy stuff, to be removed */
+ if (macctx->cipher == NULL)
+ macctx->cipher = EVP_get_cipherbyname(algoname);
+ /* TODO(3.0) END of legacy stuff */
+#endif
+
+ if (macctx->cipher == NULL)
+ return 0;
+
+ if (EVP_CIPHER_mode(macctx->cipher) != EVP_CIPH_GCM_MODE) {
+ ERR_raise(ERR_LIB_PROV, EVP_R_CIPHER_NOT_GCM_MODE);
+ return 0;
+ }
+ }
+ if (!EVP_EncryptInit_ex(ctx, macctx->cipher, macctx->engine,
+ NULL, 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 (p->data_size != (size_t)EVP_CIPHER_CTX_key_length(ctx)) {
+ ERR_raise(ERR_LIB_PROV, EVP_R_INVALID_KEY_LENGTH);
+ return 0;
+ }
+ if (!EVP_EncryptInit_ex(ctx, NULL, NULL, p->data, NULL))
+ return 0;
+ }
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_IV)) != NULL) {
+ if (p->data_type != OSSL_PARAM_OCTET_STRING)
+ return 0;
+
+ if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN,
+ p->data_size, NULL)
+ || !EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, p->data))
+ return 0;
+ }
+ return 1;
+}
+
+const OSSL_DISPATCH gmac_functions[] = {
+ { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))gmac_new },
+ { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))gmac_dup },
+ { OSSL_FUNC_MAC_FREECTX, (void (*)(void))gmac_free },
+ { OSSL_FUNC_MAC_INIT, (void (*)(void))gmac_init },
+ { OSSL_FUNC_MAC_UPDATE, (void (*)(void))gmac_update },
+ { OSSL_FUNC_MAC_FINAL, (void (*)(void))gmac_final },
+ { OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))gmac_gettable_params },
+ { OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))gmac_get_params },
+ { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
+ (void (*)(void))gmac_settable_ctx_params },
+ { OSSL_FUNC_MAC_CTX_SET_PARAMS, (void (*)(void))gmac_ctx_set_params },
+ { 0, NULL }
+};
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