1 files changed, 100 insertions, 3 deletions

diff --git a/src/lib/libcrypto/rsa/rsa_gen.c b/src/lib/libcrypto/rsa/rsa_gen.c
index b1ee5d8dce..95e636d3f0 100644
--- a/src/lib/libcrypto/rsa/rsa_gen.c
+++ b/src/lib/libcrypto/rsa/rsa_gen.c
@@ -74,11 +74,108 @@ RSA *RSA_generate_key(int bits, unsigned long e_value,
         if (ctx == NULL) goto err;
         ctx2=BN_CTX_new();
         if (ctx2 == NULL) goto err;
+        BN_CTX_start(ctx);
+        r0 = BN_CTX_get(ctx);
+        r1 = BN_CTX_get(ctx);
+        r2 = BN_CTX_get(ctx);
+        r3 = BN_CTX_get(ctx);
+        if (r3 == NULL) goto err;
 
-        /* Body of this routine removed for OpenBSD - will return
-         * when the RSA patent expires
-         */
+        bitsp=(bits+1)/2;
+        bitsq=bits-bitsp;
+        rsa=RSA_new();
+        if (rsa == NULL) goto err;
 
+        /* set e */ 
+        rsa->e=BN_new();
+        if (rsa->e == NULL) goto err;
+
+#if 1
+        /* The problem is when building with 8, 16, or 32 BN_ULONG,
+         * unsigned long can be larger */
+        for (i=0; i<sizeof(unsigned long)*8; i++)
+                {
+                if (e_value & (1<<i))
+                        BN_set_bit(rsa->e,i);
+                }
+#else
+        if (!BN_set_word(rsa->e,e_value)) goto err;
+#endif
+
+        /* generate p and q */
+        for (;;)
+                {
+                rsa->p=BN_generate_prime(NULL,bitsp,0,NULL,NULL,callback,cb_arg);
+                if (rsa->p == NULL) goto err;
+                if (!BN_sub(r2,rsa->p,BN_value_one())) goto err;
+                if (!BN_gcd(r1,r2,rsa->e,ctx)) goto err;
+                if (BN_is_one(r1)) break;
+                if (callback != NULL) callback(2,n++,cb_arg);
+                BN_free(rsa->p);
+                }
+        if (callback != NULL) callback(3,0,cb_arg);
+        for (;;)
+                {
+                rsa->q=BN_generate_prime(NULL,bitsq,0,NULL,NULL,callback,cb_arg);
+                if (rsa->q == NULL) goto err;
+                if (!BN_sub(r2,rsa->q,BN_value_one())) goto err;
+                if (!BN_gcd(r1,r2,rsa->e,ctx)) goto err;
+                if (BN_is_one(r1) && (BN_cmp(rsa->p,rsa->q) != 0))
+                        break;
+                if (callback != NULL) callback(2,n++,cb_arg);
+                BN_free(rsa->q);
+                }
+        if (callback != NULL) callback(3,1,cb_arg);
+        if (BN_cmp(rsa->p,rsa->q) < 0)
+                {
+                tmp=rsa->p;
+                rsa->p=rsa->q;
+                rsa->q=tmp;
+                }
+
+        /* calculate n */
+        rsa->n=BN_new();
+        if (rsa->n == NULL) goto err;
+        if (!BN_mul(rsa->n,rsa->p,rsa->q,ctx)) goto err;
+
+        /* calculate d */
+        if (!BN_sub(r1,rsa->p,BN_value_one())) goto err;        /* p-1 */
+        if (!BN_sub(r2,rsa->q,BN_value_one())) goto err;        /* q-1 */
+        if (!BN_mul(r0,r1,r2,ctx)) goto err;    /* (p-1)(q-1) */
+
+/* should not be needed, since gcd(p-1,e) == 1 and gcd(q-1,e) == 1 */
+/*      for (;;)
+                {
+                if (!BN_gcd(r3,r0,rsa->e,ctx)) goto err;
+                if (BN_is_one(r3)) break;
+
+                if (1)
+                        {
+                        if (!BN_add_word(rsa->e,2L)) goto err;
+                        continue;
+                        }
+                RSAerr(RSA_F_RSA_GENERATE_KEY,RSA_R_BAD_E_VALUE);
+                goto err;
+                }
+*/
+        rsa->d=BN_mod_inverse(NULL,rsa->e,r0,ctx2);     /* d */
+        if (rsa->d == NULL) goto err;
+
+        /* calculate d mod (p-1) */
+        rsa->dmp1=BN_new();
+        if (rsa->dmp1 == NULL) goto err;
+        if (!BN_mod(rsa->dmp1,rsa->d,r1,ctx)) goto err;
+
+        /* calculate d mod (q-1) */
+        rsa->dmq1=BN_new();
+        if (rsa->dmq1 == NULL) goto err;
+        if (!BN_mod(rsa->dmq1,rsa->d,r2,ctx)) goto err;
+
+        /* calculate inverse of q mod p */
+        rsa->iqmp=BN_mod_inverse(NULL,rsa->q,rsa->p,ctx2);
+        if (rsa->iqmp == NULL) goto err;
+
+        ok=1;
 err:
         if (ok == -1)
                 {