X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdsa%2Fdsa_pmeth.c;h=cfba91ca08167ccbee21e12d4f75c39c81eef924;hp=594583ffc8548d8f898ecfd291406d042e8b0232;hb=9fdcc21fdc9d148f78d9cd5be34030f38cc45812;hpb=b39fc560612984e65ec30d7f37487303bf514fb3

diff --git a/crypto/dsa/dsa_pmeth.c b/crypto/dsa/dsa_pmeth.c
index 594583ffc8..cfba91ca08 100644
--- a/crypto/dsa/dsa_pmeth.c
+++ b/crypto/dsa/dsa_pmeth.c
@@ -1,59 +1,10 @@
 /*
- * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
- * 2006.
- */
-/* ====================================================================
- * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- *    software must display the following acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+ * Copyright 2006-2018 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>
@@ -80,9 +31,9 @@ typedef struct {
 
 static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
 {
-    DSA_PKEY_CTX *dctx;
-    dctx = OPENSSL_malloc(sizeof(*dctx));
-    if (!dctx)
+    DSA_PKEY_CTX *dctx = OPENSSL_malloc(sizeof(*dctx));
+
+    if (dctx == NULL)
         return 0;
     dctx->nbits = 1024;
     dctx->qbits = 160;
@@ -96,9 +47,10 @@ static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
     return 1;
 }
 
-static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+static int pkey_dsa_copy(EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src)
 {
     DSA_PKEY_CTX *dctx, *sctx;
+
     if (!pkey_dsa_init(dst))
         return 0;
     sctx = src->data;
@@ -120,17 +72,15 @@ static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
                          size_t *siglen, const unsigned char *tbs,
                          size_t tbslen)
 {
-    int ret, type;
+    int ret;
     unsigned int sltmp;
     DSA_PKEY_CTX *dctx = ctx->data;
     DSA *dsa = ctx->pkey->pkey.dsa;
 
-    if (dctx->md)
-        type = EVP_MD_type(dctx->md);
-    else
-        type = NID_sha1;
+    if (dctx->md != NULL && tbslen != (size_t)EVP_MD_size(dctx->md))
+        return 0;
 
-    ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
+    ret = DSA_sign(0, tbs, tbslen, sig, &sltmp, dsa);
 
     if (ret <= 0)
         return ret;
@@ -142,16 +92,14 @@ static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
                            const unsigned char *sig, size_t siglen,
                            const unsigned char *tbs, size_t tbslen)
 {
-    int ret, type;
+    int ret;
     DSA_PKEY_CTX *dctx = ctx->data;
     DSA *dsa = ctx->pkey->pkey.dsa;
 
-    if (dctx->md)
-        type = EVP_MD_type(dctx->md);
-    else
-        type = NID_sha1;
+    if (dctx->md != NULL && tbslen != (size_t)EVP_MD_size(dctx->md))
+        return 0;
 
-    ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
+    ret = DSA_verify(0, tbs, tbslen, sig, siglen, dsa);
 
     return ret;
 }
@@ -159,6 +107,7 @@ static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
 static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 {
     DSA_PKEY_CTX *dctx = ctx->data;
+
     switch (type) {
     case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
         if (p1 < 256)
@@ -179,7 +128,7 @@ static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
             DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
             return 0;
         }
-        dctx->md = p2;
+        dctx->pmd = p2;
         return 1;
 
     case EVP_PKEY_CTRL_MD:
@@ -225,14 +174,16 @@ static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
     }
     if (strcmp(type, "dsa_paramgen_q_bits") == 0) {
         int qbits = atoi(value);
-        return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
-                                 EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits,
-                                 NULL);
+        return EVP_PKEY_CTX_set_dsa_paramgen_q_bits(ctx, qbits);
     }
     if (strcmp(type, "dsa_paramgen_md") == 0) {
-        return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
-                                 EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
-                                 (void *)EVP_get_digestbyname(value));
+        const EVP_MD *md = EVP_get_digestbyname(value);
+
+        if (md == NULL) {
+            DSAerr(DSA_F_PKEY_DSA_CTRL_STR, DSA_R_INVALID_DIGEST_TYPE);
+            return 0;
+        }
+        return EVP_PKEY_CTX_set_dsa_paramgen_md(ctx, md);
     }
     return -2;
 }
@@ -243,15 +194,16 @@ static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
     DSA_PKEY_CTX *dctx = ctx->data;
     BN_GENCB *pcb;
     int ret;
+
     if (ctx->pkey_gencb) {
         pcb = BN_GENCB_new();
-        if (!pcb)
+        if (pcb == NULL)
             return 0;
         evp_pkey_set_cb_translate(pcb, ctx);
     } else
         pcb = NULL;
     dsa = DSA_new();
-    if (!dsa) {
+    if (dsa == NULL) {
         BN_GENCB_free(pcb);
         return 0;
     }
@@ -268,12 +220,13 @@ static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
 static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
 {
     DSA *dsa = NULL;
+
     if (ctx->pkey == NULL) {
         DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
         return 0;
     }
     dsa = DSA_new();
-    if (!dsa)
+    if (dsa == NULL)
         return 0;
     EVP_PKEY_assign_DSA(pkey, dsa);
     /* Note: if error return, pkey is freed by parent routine */