[configure.ac] SCO3 needs -lcrypt_i for -lprot

[openssh.git] / rsa.c

diff --git a/rsa.c b/rsa.c
index e5eea29f5e34f75865087481cc0bd952a9c2ce13..66561a4213b5cd3b78c527116b1b80ab4dac99b7 100644 (file)
--- a/rsa.c
+++ b/rsa.c
@@ -8,7 +8,7 @@
  * 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.
  *
@@ -60,10 +60,10 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: rsa.c,v 1.18 2000/12/19 23:17:57 markus Exp $");
+RCSID("$OpenBSD: rsa.c,v 1.24 2001/12/27 18:22:16 markus Exp $");
 
 #include "rsa.h"
-#include "ssh.h"
+#include "log.h"
 #include "xmalloc.h"
 
 void
@@ -94,7 +94,7 @@ rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key)
        xfree(inbuf);
 }
 
-void
+int
 rsa_private_decrypt(BIGNUM *out, BIGNUM *in, RSA *key)
 {
        u_char *inbuf, *outbuf;
@@ -108,13 +108,37 @@ 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 {
+               BN_bin2bn(outbuf, len, out);
+       }
        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");
+
+       BN_sub(aux, rsa->q, BN_value_one());
+       BN_mod(rsa->dmq1, rsa->d, aux, ctx);
+
+       BN_sub(aux, rsa->p, BN_value_one());
+       BN_mod(rsa->dmp1, rsa->d, aux, ctx);
+
+       BN_clear_free(aux);
+       BN_CTX_free(ctx);
+}
+