Rename FIPS_mode_set and FIPS_mode. Theses symbols will be defined in

[openssl.git] / crypto / dh / dh_key.c

diff --git a/crypto/dh/dh_key.c b/crypto/dh/dh_key.c
index 37a2c1bca23f4d7a4810a786146132ef48add7e8..ca2435e75fea28d465827df38a061820c53914e0 100644 (file)
--- a/crypto/dh/dh_key.c
+++ b/crypto/dh/dh_key.c
@@ -56,11 +56,16 @@
  * [including the GNU Public Licence.]
  */
 
+#define OPENSSL_FIPSAPI
+
 #include <stdio.h>
 #include "cryptlib.h"
 #include <openssl/bn.h>
 #include <openssl/rand.h>
 #include <openssl/dh.h>
+#ifdef OPENSSL_FIPS
+#include <openssl/fips.h>
+#endif
 
 static int generate_key(DH *dh);
 static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
@@ -81,6 +86,21 @@ int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
        return dh->meth->compute_key(key, pub_key, dh);
        }
 
+int DH_compute_key_padded(unsigned char *key, const BIGNUM *pub_key, DH *dh)
+       {
+       int rv, pad;
+       rv = dh->meth->compute_key(key, pub_key, dh);
+       if (rv <= 0)
+               return rv;
+       pad = BN_num_bytes(dh->p) - rv;
+       if (pad > 0)
+               {
+               memmove(key + pad, key, rv);
+               memset(key, 0, pad);
+               }
+       return rv + pad;
+       }
+
 static DH_METHOD dh_ossl = {
 "OpenSSL DH Method",
 generate_key,
@@ -107,6 +127,14 @@ static int generate_key(DH *dh)
        BN_MONT_CTX *mont=NULL;
        BIGNUM *pub_key=NULL,*priv_key=NULL;
 
+#ifdef OPENSSL_FIPS
+       if (FIPS_module_mode() && (BN_num_bits(dh->p) < OPENSSL_DH_FIPS_MIN_MODULUS_BITS))
+               {
+               DHerr(DH_F_GENERATE_KEY, DH_R_KEY_SIZE_TOO_SMALL);
+               return 0;
+               }
+#endif
+
        ctx = BN_CTX_new();
        if (ctx == NULL) goto err;
 
@@ -138,8 +166,21 @@ static int generate_key(DH *dh)
 
        if (generate_new_key)
                {
-               l = dh->length ? dh->length : BN_num_bits(dh->p)-1; /* secret exponent length */
-               if (!BN_rand(priv_key, l, 0, 0)) goto err;
+               if (dh->q)
+                       {
+                       do
+                               {
+                               if (!BN_rand_range(priv_key, dh->q))
+                                       goto err;
+                               }
+                       while (BN_is_zero(priv_key) || BN_is_one(priv_key));
+                       }
+               else
+                       {
+                       /* secret exponent length */
+                       l = dh->length ? dh->length : BN_num_bits(dh->p)-1;
+                       if (!BN_rand(priv_key, l, 0, 0)) goto err;
+                       }
                }
 
        {
@@ -150,7 +191,7 @@ static int generate_key(DH *dh)
                        {
                        BN_init(&local_prk);
                        prk = &local_prk;
-                       BN_with_flags(prk, priv_key, BN_FLG_EXP_CONSTTIME);
+                       BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
                        }
                else
                        prk = priv_key;
@@ -185,6 +226,14 @@ static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
                goto err;
                }
 
+#ifdef OPENSSL_FIPS
+       if (FIPS_module_mode() && (BN_num_bits(dh->p) < OPENSSL_DH_FIPS_MIN_MODULUS_BITS))
+               {
+               DHerr(DH_F_COMPUTE_KEY, DH_R_KEY_SIZE_TOO_SMALL);
+               goto err;
+               }
+#endif
+
        ctx = BN_CTX_new();
        if (ctx == NULL) goto err;
        BN_CTX_start(ctx);
@@ -203,7 +252,7 @@ static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh)
                if ((dh->flags & DH_FLAG_NO_EXP_CONSTTIME) == 0)
                        {
                        /* XXX */
-                       BN_set_flags(dh->priv_key, BN_FLG_EXP_CONSTTIME);
+                       BN_set_flags(dh->priv_key, BN_FLG_CONSTTIME);
                        }
                if (!mont)
                        goto err;
@@ -251,6 +300,13 @@ static int dh_bn_mod_exp(const DH *dh, BIGNUM *r,
 
 static int dh_init(DH *dh)
        {
+#ifdef OPENSSL_FIPS
+       if(FIPS_selftest_failed())
+               {
+               FIPSerr(FIPS_F_DH_INIT,FIPS_R_FIPS_SELFTEST_FAILED);
+               return 0;
+               }
+#endif
        dh->flags |= DH_FLAG_CACHE_MONT_P;
        return(1);
        }