+++ /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 <string.h>
-#include <openssl/err.h>
-#include <openssl/ossl_typ.h>
-#include <openssl/asn1.h>
-#include <openssl/hmac.h>
-#include "internal/evp_int.h"
-
-/* local HMAC context structure */
-
-/* typedef EVP_MAC_IMPL */
-struct evp_mac_impl_st {
- /* tmpmd and tmpengine are set to NULL after a CMAC_Init call */
- const EVP_MD *tmpmd; /* HMAC digest */
- const ENGINE *tmpengine; /* HMAC digest engine */
- HMAC_CTX *ctx; /* HMAC context */
-};
-
-static EVP_MAC_IMPL *hmac_new(void)
-{
- EVP_MAC_IMPL *hctx;
-
- if ((hctx = OPENSSL_zalloc(sizeof(*hctx))) == NULL
- || (hctx->ctx = HMAC_CTX_new()) == NULL) {
- OPENSSL_free(hctx);
- return NULL;
- }
-
- return hctx;
-}
-
-static void hmac_free(EVP_MAC_IMPL *hctx)
-{
- if (hctx != NULL) {
- HMAC_CTX_free(hctx->ctx);
- OPENSSL_free(hctx);
- }
-}
-
-static EVP_MAC_IMPL *hmac_dup(const EVP_MAC_IMPL *hsrc)
-{
- EVP_MAC_IMPL *hdst;
-
- hdst = hmac_new();
- if (hdst == NULL)
- return NULL;
-
- if (!HMAC_CTX_copy(hdst->ctx, hsrc->ctx)) {
- hmac_free(hdst);
- return NULL;
- }
-
- hdst->tmpengine = hsrc->tmpengine;
- hdst->tmpmd = hsrc->tmpmd;
-
- return hdst;
-}
-
-static size_t hmac_size(EVP_MAC_IMPL *hctx)
-{
- return HMAC_size(hctx->ctx);
-}
-
-static int hmac_init(EVP_MAC_IMPL *hctx)
-{
- int rv = 1;
-
- /* HMAC_Init_ex doesn't tolerate all zero params, so we must be careful */
- if (hctx->tmpmd != NULL)
- rv = HMAC_Init_ex(hctx->ctx, NULL, 0, hctx->tmpmd,
- (ENGINE * )hctx->tmpengine);
- hctx->tmpengine = NULL;
- hctx->tmpmd = NULL;
- return rv;
-}
-
-static int hmac_update(EVP_MAC_IMPL *hctx, const unsigned char *data,
- size_t datalen)
-{
- return HMAC_Update(hctx->ctx, data, datalen);
-}
-
-static int hmac_final(EVP_MAC_IMPL *hctx, unsigned char *out)
-{
- unsigned int hlen;
-
- return HMAC_Final(hctx->ctx, out, &hlen);
-}
-
-static int hmac_ctrl(EVP_MAC_IMPL *hctx, int cmd, va_list args)
-{
- switch (cmd) {
- case EVP_MAC_CTRL_SET_FLAGS:
- {
- unsigned long flags = va_arg(args, unsigned long);
-
- HMAC_CTX_set_flags(hctx->ctx, flags);
- }
- break;
- 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 = HMAC_Init_ex(hctx->ctx, key, keylen, hctx->tmpmd,
- (ENGINE *)hctx->tmpengine);
-
- hctx->tmpengine = NULL;
- hctx->tmpmd = NULL;
- return rv;
- }
- break;
- case EVP_MAC_CTRL_SET_MD:
- hctx->tmpmd = va_arg(args, const EVP_MD *);
- break;
- case EVP_MAC_CTRL_SET_ENGINE:
- hctx->tmpengine = va_arg(args, const ENGINE *);
- break;
- default:
- return -2;
-
- }
- return 1;
-}
-
-static int hmac_ctrl_int(EVP_MAC_IMPL *hctx, int cmd, ...)
-{
- int rv;
- va_list args;
-
- va_start(args, cmd);
- rv = hmac_ctrl(hctx, cmd, args);
- va_end(args);
-
- return rv;
-}
-
-static int hmac_ctrl_str_cb(void *hctx, int cmd, void *buf, size_t buflen)
-{
- return hmac_ctrl_int(hctx, cmd, buf, buflen);
-}
-
-static int hmac_ctrl_str(EVP_MAC_IMPL *hctx, const char *type,
- const char *value)
-{
- if (!value)
- return 0;
-#ifndef FIPS_MODE
- /*
- * We don't have EVP_get_digestbyname() in FIPS_MODE. That function returns
- * an EVP_MD without an associated provider implementation (i.e. it is
- * using "implicit fetch"). We could replace it with an "explicit" fetch
- * using EVP_MD_fetch(), but we'd then be required to free the returned
- * EVP_MD somewhere. Probably the complexity isn't worth it as we are
- * unlikely to need this ctrl in FIPS_MODE anyway.
- */
- if (strcmp(type, "digest") == 0) {
- const EVP_MD *d = EVP_get_digestbyname(value);
-
- if (d == NULL)
- return 0;
- return hmac_ctrl_int(hctx, EVP_MAC_CTRL_SET_MD, d);
- }
-#endif
- if (strcmp(type, "key") == 0)
- return EVP_str2ctrl(hmac_ctrl_str_cb, hctx, EVP_MAC_CTRL_SET_KEY,
- value);
- if (strcmp(type, "hexkey") == 0)
- return EVP_hex2ctrl(hmac_ctrl_str_cb, hctx, EVP_MAC_CTRL_SET_KEY,
- value);
- return -2;
-}
-
-const EVP_MAC hmac_meth = {
- EVP_MAC_HMAC,
- hmac_new,
- hmac_dup,
- hmac_free,
- hmac_size,
- hmac_init,
- hmac_update,
- hmac_final,
- hmac_ctrl,
- hmac_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/core_numbers.h>
+#include <openssl/core_names.h>
+#include <openssl/params.h>
+#include <openssl/engine.h>
+#include <openssl/evp.h>
+#include <openssl/hmac.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 hmac_new;
+static OSSL_OP_mac_dupctx_fn hmac_dup;
+static OSSL_OP_mac_freectx_fn hmac_free;
+static OSSL_OP_mac_gettable_ctx_params_fn hmac_gettable_ctx_params;
+static OSSL_OP_mac_ctx_get_params_fn hmac_ctx_get_params;
+static OSSL_OP_mac_settable_ctx_params_fn hmac_settable_ctx_params;
+static OSSL_OP_mac_ctx_set_params_fn hmac_ctx_set_params;
+static OSSL_OP_mac_init_fn hmac_init;
+static OSSL_OP_mac_update_fn hmac_update;
+static OSSL_OP_mac_final_fn hmac_final;
+
+/* local HMAC context structure */
+
+/* typedef EVP_MAC_IMPL */
+struct hmac_data_st {
+ void *provctx;
+ HMAC_CTX *ctx; /* HMAC context */
+
+ /*
+ * References to the underlying digest implementation. tmpmd caches
+ * the md, always. alloc_md only holds a reference to an explicitly
+ * fetched digest.
+ * tmpmd is cleared after a CMAC_Init call.
+ */
+ const EVP_MD *tmpmd; /* HMAC digest */
+ EVP_MD *alloc_md; /* fetched digest */
+
+ /*
+ * Conditions for legacy EVP_MD uses.
+ * tmpengine is cleared after a CMAC_Init call.
+ */
+ ENGINE *tmpengine; /* HMAC digest engine */
+};
+
+static size_t hmac_size(void *vmacctx);
+
+static void *hmac_new(void *provctx)
+{
+ struct hmac_data_st *macctx;
+
+ if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
+ || (macctx->ctx = HMAC_CTX_new()) == NULL) {
+ OPENSSL_free(macctx);
+ return NULL;
+ }
+ /* TODO(3.0) Should we do something more with that context? */
+ macctx->provctx = provctx;
+
+ return macctx;
+}
+
+static void hmac_free(void *vmacctx)
+{
+ struct hmac_data_st *macctx = vmacctx;
+
+ if (macctx != NULL) {
+ HMAC_CTX_free(macctx->ctx);
+ EVP_MD_meth_free(macctx->alloc_md);
+ OPENSSL_free(macctx);
+ }
+}
+
+static void *hmac_dup(void *vsrc)
+{
+ struct hmac_data_st *src = vsrc;
+ struct hmac_data_st *dst = hmac_new(src->provctx);
+
+ if (dst == NULL)
+ return NULL;
+
+ if (!HMAC_CTX_copy(dst->ctx, src->ctx)) {
+ hmac_free(dst);
+ return NULL;
+ }
+
+ if (src->alloc_md != NULL && !EVP_MD_up_ref(src->alloc_md)) {
+ hmac_free(dst);
+ return NULL;
+ }
+
+ dst->tmpengine = src->tmpengine;
+ dst->tmpmd = src->tmpmd;
+ dst->alloc_md = src->alloc_md;
+ return dst;
+}
+
+static size_t hmac_size(void *vmacctx)
+{
+ struct hmac_data_st *macctx = vmacctx;
+
+ return HMAC_size(macctx->ctx);
+}
+
+static int hmac_init(void *vmacctx)
+{
+ struct hmac_data_st *macctx = vmacctx;
+ int rv = 1;
+
+ /* HMAC_Init_ex doesn't tolerate all zero params, so we must be careful */
+ if (macctx->tmpmd != NULL)
+ rv = HMAC_Init_ex(macctx->ctx, NULL, 0, macctx->tmpmd,
+ (ENGINE * )macctx->tmpengine);
+ macctx->tmpengine = NULL;
+ macctx->tmpmd = NULL;
+ return rv;
+}
+
+static int hmac_update(void *vmacctx, const unsigned char *data,
+ size_t datalen)
+{
+ struct hmac_data_st *macctx = vmacctx;
+
+ return HMAC_Update(macctx->ctx, data, datalen);
+}
+
+static int hmac_final(void *vmacctx, unsigned char *out, size_t *outl,
+ size_t outsize)
+{
+ unsigned int hlen;
+ struct hmac_data_st *macctx = vmacctx;
+
+ if (!HMAC_Final(macctx->ctx, out, &hlen))
+ return 0;
+ if (outl != NULL)
+ *outl = hlen;
+ return 1;
+}
+
+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 *hmac_gettable_ctx_params(void)
+{
+ return known_gettable_ctx_params;
+}
+
+static int hmac_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, hmac_size(vmacctx));
+
+ return 1;
+}
+
+static const OSSL_PARAM known_settable_ctx_params[] = {
+ /* "algorithm" and "digest" are the same parameter */
+ OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_ALGORITHM, NULL, 0),
+ OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_DIGEST, 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_int(OSSL_MAC_PARAM_FLAGS, NULL),
+ OSSL_PARAM_END
+};
+static const OSSL_PARAM *hmac_settable_ctx_params(void)
+{
+ return known_settable_ctx_params;
+}
+
+/*
+ * ALL parameters should be set before init().
+ */
+static int hmac_ctx_set_params(void *vmacctx, const OSSL_PARAM params[])
+{
+ struct hmac_data_st *macctx = vmacctx;
+ const OSSL_PARAM *p;
+
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_DIGEST)) != 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_MD_meth_free(macctx->alloc_md);
+
+ macctx->tmpmd = macctx->alloc_md =
+ EVP_MD_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->tmpmd == NULL)
+ macctx->tmpmd = EVP_get_digestbyname(algoname);
+ /* TODO(3.0) END of legacy stuff */
+#endif
+
+ if (macctx->tmpmd == NULL)
+ return 0;
+ }
+ }
+ /* TODO(3.0) formalize the meaning of "flags", perhaps as other params */
+ if ((p = OSSL_PARAM_locate_const(params,
+ OSSL_MAC_PARAM_FLAGS)) != NULL) {
+ int flags = 0;
+
+ if (!OSSL_PARAM_get_int(p, &flags))
+ return 0;
+ HMAC_CTX_set_flags(macctx->ctx, flags);
+ }
+ if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
+ if (p->data_type != OSSL_PARAM_OCTET_STRING)
+ return 0;
+
+ if (!HMAC_Init_ex(macctx->ctx, p->data, p->data_size,
+ macctx->tmpmd, NULL /* ENGINE */))
+ return 0;
+
+ macctx->tmpmd = NULL;
+ macctx->tmpengine = NULL;
+ }
+ return 1;
+}
+
+const OSSL_DISPATCH hmac_functions[] = {
+ { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))hmac_new },
+ { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))hmac_dup },
+ { OSSL_FUNC_MAC_FREECTX, (void (*)(void))hmac_free },
+ { OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
+ { OSSL_FUNC_MAC_UPDATE, (void (*)(void))hmac_update },
+ { OSSL_FUNC_MAC_FINAL, (void (*)(void))hmac_final },
+ { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
+ (void (*)(void))hmac_gettable_ctx_params },
+ { OSSL_FUNC_MAC_CTX_GET_PARAMS, (void (*)(void))hmac_ctx_get_params },
+ { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
+ (void (*)(void))hmac_settable_ctx_params },
+ { OSSL_FUNC_MAC_CTX_SET_PARAMS, (void (*)(void))hmac_ctx_set_params },
+ { 0, NULL }
+};
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