Add EVP_PKEY_supports_digest_nid()

[openssl.git] / crypto / evp / p_lib.c

diff --git a/crypto/evp/p_lib.c b/crypto/evp/p_lib.c
index 7ec1dd7800ffe1faf508edb6b52500839dd1e067..c8f326440860bb1a7b886b58c7bff5a1b9fdbc9b 100644 (file)
--- a/crypto/evp/p_lib.c
+++ b/crypto/evp/p_lib.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -18,6 +18,7 @@
 #include <openssl/rsa.h>
 #include <openssl/dsa.h>
 #include <openssl/dh.h>
+#include <openssl/cmac.h>
 #include <openssl/engine.h>
 
 #include "internal/asn1_int.h"
@@ -219,8 +220,9 @@ static int pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str,
     return 1;
 }
 
-EVP_PKEY *EVP_PKEY_new_private_key(int type, ENGINE *e, unsigned char *priv,
-                                   size_t len)
+EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
+                                       const unsigned char *priv,
+                                       size_t len)
 {
     EVP_PKEY *ret = EVP_PKEY_new();
 
@@ -231,13 +233,13 @@ EVP_PKEY *EVP_PKEY_new_private_key(int type, ENGINE *e, unsigned char *priv,
     }
 
     if (ret->ameth->set_priv_key == NULL) {
-        EVPerr(EVP_F_EVP_PKEY_NEW_PRIVATE_KEY,
+        EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY,
                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
         goto err;
     }
 
     if (!ret->ameth->set_priv_key(ret, priv, len)) {
-        /* We assume the method function calls EVPerr */
+        EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PRIVATE_KEY, EVP_R_KEY_SETUP_FAILED);
         goto err;
     }
 
@@ -248,8 +250,9 @@ EVP_PKEY *EVP_PKEY_new_private_key(int type, ENGINE *e, unsigned char *priv,
     return NULL;
 }
 
-EVP_PKEY *EVP_PKEY_new_public_key(int type, ENGINE *e, unsigned char *pub,
-                                  size_t len)
+EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
+                                      const unsigned char *pub,
+                                      size_t len)
 {
     EVP_PKEY *ret = EVP_PKEY_new();
 
@@ -260,13 +263,13 @@ EVP_PKEY *EVP_PKEY_new_public_key(int type, ENGINE *e, unsigned char *pub,
     }
 
     if (ret->ameth->set_pub_key == NULL) {
-        EVPerr(EVP_F_EVP_PKEY_NEW_PUBLIC_KEY,
+        EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY,
                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
         goto err;
     }
 
     if (!ret->ameth->set_pub_key(ret, pub, len)) {
-        /* We assume the method function calls EVPerr */
+        EVPerr(EVP_F_EVP_PKEY_NEW_RAW_PUBLIC_KEY, EVP_R_KEY_SETUP_FAILED);
         goto err;
     }
 
@@ -277,6 +280,74 @@ EVP_PKEY *EVP_PKEY_new_public_key(int type, ENGINE *e, unsigned char *pub,
     return NULL;
 }
 
+int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
+                                 size_t *len)
+{
+     if (pkey->ameth->get_priv_key == NULL) {
+        EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY,
+               EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+        return 0;
+    }
+
+    if (!pkey->ameth->get_priv_key(pkey, priv, len)) {
+        EVPerr(EVP_F_EVP_PKEY_GET_RAW_PRIVATE_KEY, EVP_R_GET_RAW_KEY_FAILED);
+        return 0;
+    }
+
+    return 1;
+}
+
+int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
+                                size_t *len)
+{
+     if (pkey->ameth->get_pub_key == NULL) {
+        EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY,
+               EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+        return 0;
+    }
+
+    if (!pkey->ameth->get_pub_key(pkey, pub, len)) {
+        EVPerr(EVP_F_EVP_PKEY_GET_RAW_PUBLIC_KEY, EVP_R_GET_RAW_KEY_FAILED);
+        return 0;
+    }
+
+    return 1;
+}
+
+EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
+                                size_t len, const EVP_CIPHER *cipher)
+{
+#ifndef OPENSSL_NO_CMAC
+    EVP_PKEY *ret = EVP_PKEY_new();
+    EVP_MAC_CTX *cmctx = EVP_MAC_CTX_new_id(EVP_MAC_CMAC);
+
+    if (ret == NULL
+            || cmctx == NULL
+            || !pkey_set_type(ret, e, EVP_PKEY_CMAC, NULL, -1)) {
+        /* EVPerr already called */
+        goto err;
+    }
+
+    if (EVP_MAC_ctrl(cmctx, EVP_MAC_CTRL_SET_ENGINE, e) <= 0
+        || EVP_MAC_ctrl(cmctx, EVP_MAC_CTRL_SET_CIPHER, cipher) <= 0
+        || EVP_MAC_ctrl(cmctx, EVP_MAC_CTRL_SET_KEY, priv, len) <= 0) {
+        EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY, EVP_R_KEY_SETUP_FAILED);
+        goto err;
+    }
+
+    ret->pkey.ptr = cmctx;
+    return ret;
+
+ err:
+    EVP_PKEY_free(ret);
+    EVP_MAC_CTX_free(cmctx);
+    return NULL;
+#else
+    EVPerr(EVP_F_EVP_PKEY_NEW_CMAC_KEY,
+           EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+    return NULL;
+#endif
+}
 
 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
 {
@@ -287,6 +358,26 @@ int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
 {
     return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len);
 }
+
+int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type)
+{
+    if (pkey->type == type) {
+        return 1; /* it already is that type */
+    }
+
+    /*
+     * The application is requesting to alias this to a different pkey type,
+     * but not one that resolves to the base type.
+     */
+    if (EVP_PKEY_type(type) != EVP_PKEY_base_id(pkey)) {
+        EVPerr(EVP_F_EVP_PKEY_SET_ALIAS_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
+        return 0;
+    }
+
+    pkey->type = type;
+    return 1;
+}
+
 #ifndef OPENSSL_NO_ENGINE
 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e)
 {
@@ -576,6 +667,26 @@ int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
     return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
 }
 
+int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid)
+{
+    int rv, default_nid;
+
+    rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SUPPORTS_MD_NID, nid, NULL);
+    if (rv == -2) {
+        /*
+         * If there is a mandatory default digest and this isn't it, then
+         * the answer is 'no'.
+         */
+        rv = EVP_PKEY_get_default_digest_nid(pkey, &default_nid);
+        if (rv == 2)
+            return (nid == default_nid);
+        /* zero is an error from EVP_PKEY_get_default_digest_nid() */
+        if (rv == 0)
+            return -1;
+    }
+    return rv;
+}
+
 int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
                                const unsigned char *pt, size_t ptlen)
 {