1 files changed, 112 insertions, 0 deletions

diff --git a/src/lib/libcrypto/dsa/dsa_key.c b/src/lib/libcrypto/dsa/dsa_key.c
new file mode 100644
index 0000000000..d51ed9395f
--- /dev/null
+++ b/src/lib/libcrypto/dsa/dsa_key.c
@@ -0,0 +1,112 @@
+/* crypto/dsa/dsa_key.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * 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 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 acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS 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 AUTHOR OR 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.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <time.h>
+#include "cryptlib.h"
+#include "sha.h"
+#include "bn.h"
+#include "dsa.h"
+#include "rand.h"
+
+int DSA_generate_key(dsa)
+DSA *dsa;
+        {
+        int ok=0;
+        unsigned int i;
+        BN_CTX *ctx=NULL;
+        BIGNUM *pub_key=NULL,*priv_key=NULL;
+
+        if ((ctx=BN_CTX_new()) == NULL) goto err;
+
+        if (dsa->priv_key == NULL)
+                {
+                if ((priv_key=BN_new()) == NULL) goto err;
+                }
+        else
+                priv_key=dsa->priv_key;
+
+        i=BN_num_bits(dsa->q);
+        for (;;)
+                {
+                BN_rand(priv_key,i,1,0);
+                if (BN_cmp(priv_key,dsa->q) >= 0)
+                        BN_sub(priv_key,priv_key,dsa->q);
+                if (!BN_is_zero(priv_key)) break;
+                }
+
+        if (dsa->pub_key == NULL)
+                {
+                if ((pub_key=BN_new()) == NULL) goto err;
+                }
+        else
+                pub_key=dsa->pub_key;
+
+        if (!BN_mod_exp(pub_key,dsa->g,priv_key,dsa->p,ctx)) goto err;
+
+        dsa->priv_key=priv_key;
+        dsa->pub_key=pub_key;
+        ok=1;
+
+err:
+        if ((pub_key != NULL) && (dsa->pub_key == NULL)) BN_free(pub_key);
+        if ((priv_key != NULL) && (dsa->priv_key == NULL)) BN_free(priv_key);
+        if (ctx != NULL) BN_CTX_free(ctx);
+        return(ok);
+        }
+