Add functions returning security bits.
[openssl.git] / crypto / rsa / rsa_lib.c
index 95a56f8a28c8e8f38132c45e4802db7202b666f0..ba277cacd87bc1ae5896284afd1ce90c60ed7bf5 100644 (file)
  */
 
 #include <stdio.h>
-#include "crypto.h"
+#include <openssl/crypto.h>
 #include "cryptlib.h"
-#include "lhash.h"
-#include "bn.h"
-#include "rsa.h"
+#include <openssl/lhash.h>
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/rand.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
 
-char *RSA_version="RSA part of SSLeay 0.9.0b 29-Jun-1998";
+const char RSA_version[]="RSA" OPENSSL_VERSION_PTEXT;
 
-static RSA_METHOD *default_RSA_meth=NULL;
-static int rsa_meth_num=0;
-static STACK *rsa_meth=NULL;
+static const RSA_METHOD *default_RSA_meth=NULL;
 
-RSA *RSA_new()
+RSA *RSA_new(void)
        {
-       return(RSA_new_method(NULL));
+       RSA *r=RSA_new_method(NULL);
+
+       return r;
        }
 
-void RSA_set_default_method(meth)
-RSA_METHOD *meth;
+void RSA_set_default_method(const RSA_METHOD *meth)
        {
-       default_RSA_meth=meth;
+       default_RSA_meth = meth;
        }
 
-RSA *RSA_new_method(meth)
-RSA_METHOD *meth;
+const RSA_METHOD *RSA_get_default_method(void)
        {
-       RSA *ret;
-
        if (default_RSA_meth == NULL)
                {
-#ifdef RSAref
-               default_RSA_meth=RSA_PKCS1_RSAref();
+#ifdef RSA_NULL
+               default_RSA_meth=RSA_null_method();
 #else
                default_RSA_meth=RSA_PKCS1_SSLeay();
 #endif
                }
-       ret=(RSA *)Malloc(sizeof(RSA));
+
+       return default_RSA_meth;
+       }
+
+const RSA_METHOD *RSA_get_method(const RSA *rsa)
+       {
+       return rsa->meth;
+       }
+
+int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
+       {
+       /* NB: The caller is specifically setting a method, so it's not up to us
+        * to deal with which ENGINE it comes from. */
+       const RSA_METHOD *mtmp;
+       mtmp = rsa->meth;
+       if (mtmp->finish) mtmp->finish(rsa);
+#ifndef OPENSSL_NO_ENGINE
+       if (rsa->engine)
+               {
+               ENGINE_finish(rsa->engine);
+               rsa->engine = NULL;
+               }
+#endif
+       rsa->meth = meth;
+       if (meth->init) meth->init(rsa);
+       return 1;
+       }
+
+RSA *RSA_new_method(ENGINE *engine)
+       {
+       RSA *ret;
+
+       ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
        if (ret == NULL)
                {
                RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
-               return(NULL);
+               return NULL;
                }
 
-       if (meth == NULL)
-               ret->meth=default_RSA_meth;
+       ret->meth = RSA_get_default_method();
+#ifndef OPENSSL_NO_ENGINE
+       if (engine)
+               {
+               if (!ENGINE_init(engine))
+                       {
+                       RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
+                       OPENSSL_free(ret);
+                       return NULL;
+                       }
+               ret->engine = engine;
+               }
        else
-               ret->meth=meth;
+               ret->engine = ENGINE_get_default_RSA();
+       if(ret->engine)
+               {
+               ret->meth = ENGINE_get_RSA(ret->engine);
+               if(!ret->meth)
+                       {
+                       RSAerr(RSA_F_RSA_NEW_METHOD,
+                               ERR_R_ENGINE_LIB);
+                       ENGINE_finish(ret->engine);
+                       OPENSSL_free(ret);
+                       return NULL;
+                       }
+               }
+#endif
 
        ret->pad=0;
        ret->version=0;
@@ -116,22 +171,37 @@ RSA_METHOD *meth;
        ret->dmq1=NULL;
        ret->iqmp=NULL;
        ret->references=1;
-       ret->method_mod_n=NULL;
-       ret->method_mod_p=NULL;
-       ret->method_mod_q=NULL;
+       ret->_method_mod_n=NULL;
+       ret->_method_mod_p=NULL;
+       ret->_method_mod_q=NULL;
        ret->blinding=NULL;
-       ret->flags=ret->meth->flags;
+       ret->mt_blinding=NULL;
+       ret->bignum_data=NULL;
+       ret->flags=ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
+       if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data))
+               {
+#ifndef OPENSSL_NO_ENGINE
+       if (ret->engine)
+               ENGINE_finish(ret->engine);
+#endif
+               OPENSSL_free(ret);
+               return(NULL);
+               }
+
        if ((ret->meth->init != NULL) && !ret->meth->init(ret))
                {
-               Free(ret);
+#ifndef OPENSSL_NO_ENGINE
+               if (ret->engine)
+                       ENGINE_finish(ret->engine);
+#endif
+               CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
+               OPENSSL_free(ret);
                ret=NULL;
                }
-       CRYPTO_new_ex_data(rsa_meth,(char *)ret,&ret->ex_data);
        return(ret);
        }
 
-void RSA_free(r)
-RSA *r;
+void RSA_free(RSA *r)
        {
        int i;
 
@@ -150,10 +220,14 @@ RSA *r;
                }
 #endif
 
-       CRYPTO_free_ex_data(rsa_meth,(char *)r,&r->ex_data);
-
-       if (r->meth->finish != NULL)
+       if (r->meth->finish)
                r->meth->finish(r);
+#ifndef OPENSSL_NO_ENGINE
+       if (r->engine)
+               ENGINE_finish(r->engine);
+#endif
+
+       CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
 
        if (r->n != NULL) BN_clear_free(r->n);
        if (r->e != NULL) BN_clear_free(r->e);
@@ -164,131 +238,90 @@ RSA *r;
        if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
        if (r->iqmp != NULL) BN_clear_free(r->iqmp);
        if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
-       Free(r);
+       if (r->mt_blinding != NULL) BN_BLINDING_free(r->mt_blinding);
+       if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
+       OPENSSL_free(r);
+       }
+
+int RSA_up_ref(RSA *r)
+       {
+       int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
+#ifdef REF_PRINT
+       REF_PRINT("RSA",r);
+#endif
+#ifdef REF_CHECK
+       if (i < 2)
+               {
+               fprintf(stderr, "RSA_up_ref, bad reference count\n");
+               abort();
+               }
+#endif
+       return ((i > 1) ? 1 : 0);
        }
 
-int RSA_get_ex_new_index(argl,argp,new_func,dup_func,free_func)
-long argl;
-char *argp;
-int (*new_func)();
-int (*dup_func)();
-void (*free_func)();
+int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
+            CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
         {
-       rsa_meth_num++;
-       return(CRYPTO_get_ex_new_index(rsa_meth_num-1,
-               &rsa_meth,argl,argp,new_func,dup_func,free_func));
+       return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
+                               new_func, dup_func, free_func);
         }
 
-int RSA_set_ex_data(r,idx,arg)
-RSA *r;
-int idx;
-char *arg;
+int RSA_set_ex_data(RSA *r, int idx, void *arg)
        {
        return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
        }
 
-char *RSA_get_ex_data(r,idx)
-RSA *r;
-int idx;
+void *RSA_get_ex_data(const RSA *r, int idx)
        {
        return(CRYPTO_get_ex_data(&r->ex_data,idx));
        }
 
-int RSA_size(r)
-RSA *r;
-       {
-       return(BN_num_bytes(r->n));
-       }
-
-int RSA_public_encrypt(flen, from, to, rsa, padding)
-int flen;
-unsigned char *from;
-unsigned char *to;
-RSA *rsa;
-int padding;
-       {
-       return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
-       }
-
-int RSA_private_encrypt(flen, from, to, rsa, padding)
-int flen;
-unsigned char *from;
-unsigned char *to;
-RSA *rsa;
-int padding;
-       {
-       return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
-       }
-
-int RSA_private_decrypt(flen, from, to, rsa, padding)
-int flen;
-unsigned char *from;
-unsigned char *to;
-RSA *rsa;
-int padding;
+int RSA_memory_lock(RSA *r)
        {
-       return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
-       }
+       int i,j,k,off;
+       char *p;
+       BIGNUM *bn,**t[6],*b;
+       BN_ULONG *ul;
 
-int RSA_public_decrypt(flen, from, to, rsa, padding)
-int flen;
-unsigned char *from;
-unsigned char *to;
-RSA *rsa;
-int padding;
-       {
-       return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
-       }
-
-int RSA_flags(r)
-RSA *r;
-       {
-       return((r == NULL)?0:r->meth->flags);
-       }
-
-void RSA_blinding_off(rsa)
-RSA *rsa;
-       {
-       if (rsa->blinding != NULL)
+       if (r->d == NULL) return(1);
+       t[0]= &r->d;
+       t[1]= &r->p;
+       t[2]= &r->q;
+       t[3]= &r->dmp1;
+       t[4]= &r->dmq1;
+       t[5]= &r->iqmp;
+       k=sizeof(BIGNUM)*6;
+       off=k/sizeof(BN_ULONG)+1;
+       j=1;
+       for (i=0; i<6; i++)
+               j+= (*t[i])->top;
+       if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
                {
-               BN_BLINDING_free(rsa->blinding);
-               rsa->blinding=NULL;
+               RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
+               return(0);
                }
-       rsa->flags&= ~RSA_FLAG_BLINDING;
-       }
-
-int RSA_blinding_on(rsa,p_ctx)
-RSA *rsa;
-BN_CTX *p_ctx;
-       {
-       BIGNUM *A,*Ai;
-       BN_CTX *ctx;
-       int ret=0;
-
-       if (p_ctx == NULL)
+       bn=(BIGNUM *)p;
+       ul=(BN_ULONG *)&(p[off]);
+       for (i=0; i<6; i++)
                {
-               if ((ctx=BN_CTX_new()) == NULL) goto err;
+               b= *(t[i]);
+               *(t[i])= &(bn[i]);
+               memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
+               bn[i].flags=BN_FLG_STATIC_DATA;
+               bn[i].d=ul;
+               memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
+               ul+=b->top;
+               BN_clear_free(b);
                }
-       else
-               ctx=p_ctx;
-
-       if (rsa->blinding != NULL)
-               BN_BLINDING_free(rsa->blinding);
+       
+       /* I should fix this so it can still be done */
+       r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
 
-       A=ctx->bn[0];
-       ctx->tos++;
-       if (!BN_rand(A,BN_num_bits(rsa->n)-1,1,0)) goto err;
-       if ((Ai=BN_mod_inverse(A,rsa->n,ctx)) == NULL) goto err;
-
-       if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,
-               (char *)rsa->method_mod_n)) goto err;
-       rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
-       ctx->tos--;
-       rsa->flags|=RSA_FLAG_BLINDING;
-       BN_free(Ai);
-       ret=1;
-err:
-       if (ctx != p_ctx) BN_CTX_free(ctx);
-       return(ret);
+       r->bignum_data=p;
+       return(1);
        }
 
+int RSA_security_bits(const RSA *rsa)
+       {
+       return BN_security_bits(BN_num_bits(rsa->n), -1);
+       }