X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/f072c47aad6b3de1995b23ed102addb469226610..HEAD:/rsa.c

diff --git a/rsa.c b/rsa.c
index 8ef7b22c..bec1d190 100644
--- a/rsa.c
+++ b/rsa.c
@@ -1,3 +1,4 @@
+/* $OpenBSD: rsa.c,v 1.29 2006/11/06 21:25:28 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -8,7 +9,7 @@
  * software must be clearly marked as such, and if the derived work is
  * incompatible with the protocol description in the RFC file, it must be
  * called by a name other than "ssh" or "Secure Shell".
- * 
+ *
  *
  * Copyright (c) 1999 Niels Provos.  All rights reserved.
  *
@@ -60,16 +61,20 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: rsa.c,v 1.17 2000/11/12 19:50:37 markus Exp $");
 
-#include "rsa.h"
-#include "ssh.h"
+#include <sys/types.h>
+
+#include <stdarg.h>
+#include <string.h>
+
 #include "xmalloc.h"
+#include "rsa.h"
+#include "log.h"
 
 void
 rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key)
 {
-	unsigned char *inbuf, *outbuf;
+	u_char *inbuf, *outbuf;
 	int len, ilen, olen;
 
 	if (BN_num_bits(key->e) < 2 || !BN_is_odd(key->e))
@@ -86,7 +91,8 @@ rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key)
 	    RSA_PKCS1_PADDING)) <= 0)
 		fatal("rsa_public_encrypt() failed");
 
-	BN_bin2bn(outbuf, len, out);
+	if (BN_bin2bn(outbuf, len, out) == NULL)
+		fatal("rsa_public_encrypt: BN_bin2bn failed");
 
 	memset(outbuf, 0, olen);
 	memset(inbuf, 0, ilen);
@@ -94,10 +100,10 @@ rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key)
 	xfree(inbuf);
 }
 
-void
+int
 rsa_private_decrypt(BIGNUM *out, BIGNUM *in, RSA *key)
 {
-	unsigned char *inbuf, *outbuf;
+	u_char *inbuf, *outbuf;
 	int len, ilen, olen;
 
 	olen = BN_num_bytes(key->n);
@@ -108,13 +114,38 @@ rsa_private_decrypt(BIGNUM *out, BIGNUM *in, RSA *key)
 	BN_bn2bin(in, inbuf);
 
 	if ((len = RSA_private_decrypt(ilen, inbuf, outbuf, key,
-	    RSA_PKCS1_PADDING)) <= 0)
-		fatal("rsa_private_decrypt() failed");
-
-	BN_bin2bn(outbuf, len, out);
-
+	    RSA_PKCS1_PADDING)) <= 0) {
+		error("rsa_private_decrypt() failed");
+	} else {
+		if (BN_bin2bn(outbuf, len, out) == NULL)
+			fatal("rsa_private_decrypt: BN_bin2bn failed");
+	}
 	memset(outbuf, 0, olen);
 	memset(inbuf, 0, ilen);
 	xfree(outbuf);
 	xfree(inbuf);
+	return len;
 }
+
+/* calculate p-1 and q-1 */
+void
+rsa_generate_additional_parameters(RSA *rsa)
+{
+	BIGNUM *aux;
+	BN_CTX *ctx;
+
+	if ((aux = BN_new()) == NULL)
+		fatal("rsa_generate_additional_parameters: BN_new failed");
+	if ((ctx = BN_CTX_new()) == NULL)
+		fatal("rsa_generate_additional_parameters: BN_CTX_new failed");
+
+	if ((BN_sub(aux, rsa->q, BN_value_one()) == 0) ||
+	    (BN_mod(rsa->dmq1, rsa->d, aux, ctx) == 0) ||
+	    (BN_sub(aux, rsa->p, BN_value_one()) == 0) ||
+	    (BN_mod(rsa->dmp1, rsa->d, aux, ctx) == 0))
+		fatal("rsa_generate_additional_parameters: BN_sub/mod failed");
+
+	BN_clear_free(aux);
+	BN_CTX_free(ctx);
+}
+