X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Frsa%2Frsa_lib.c;h=7f1f94ee500cb15a9e5e839784278d5c902ffbdb;hp=c49d0ee0c362c684aed8787c19aa6b356222f177;hb=8afca8d9c60c3d7db6f9bc94a97c77f016fc139d;hpb=b7896b3cb86d80206af14a14d69b0717786f2729

diff --git a/crypto/rsa/rsa_lib.c b/crypto/rsa/rsa_lib.c
index c49d0ee0c3..7f1f94ee50 100644
--- a/crypto/rsa/rsa_lib.c
+++ b/crypto/rsa/rsa_lib.c
@@ -1,5 +1,5 @@
 /* crypto/rsa/rsa_lib.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
  * This package is an SSL implementation written
@@ -57,49 +57,112 @@
  */
 
 #include <stdio.h>
+#include <openssl/crypto.h>
 #include "cryptlib.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 0.8.1b 29-Jun-1998";
+const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT;
 
-static RSA_METHOD *default_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
+#ifdef RSA_NULL
+		default_RSA_meth=RSA_null_method();
+#else
+#if 0 /* was: #ifdef RSAref */
 		default_RSA_meth=RSA_PKCS1_RSAref();
 #else
 		default_RSA_meth=RSA_PKCS1_SSLeay();
+#endif
 #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;
@@ -112,23 +175,37 @@ RSA_METHOD *meth;
 	ret->dmq1=NULL;
 	ret->iqmp=NULL;
 	ret->references=1;
-	ret->app_data=NULL;
+	ret->_method_mod_n=NULL;
+	ret->_method_mod_p=NULL;
+	ret->_method_mod_q=NULL;
+	ret->blinding=NULL;
+	ret->mt_blinding=NULL;
+	ret->bignum_data=NULL;
+	ret->flags=ret->meth->flags;
+	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
 	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;
 		}
 	return(ret);
 	}
 
-void RSA_free(r)
-RSA *r;
+void RSA_free(RSA *r)
 	{
 	int i;
 
 	if (r == NULL) return;
 
 	i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
+#ifdef REF_PRINT
+	REF_PRINT("RSA",r);
+#endif
 	if (i > 0) return;
 #ifdef REF_CHECK
 	if (i < 0)
@@ -138,8 +215,14 @@ RSA *r;
 		}
 #endif
 
-	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);
@@ -149,52 +232,226 @@ RSA *r;
 	if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
 	if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
 	if (r->iqmp != NULL) BN_clear_free(r->iqmp);
-	Free(r);
+	if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
+	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(long argl, void *argp, CRYPTO_EX_new *new_func,
+	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *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(RSA *r, int idx, void *arg)
+	{
+	return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
+	}
+
+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;
+int RSA_size(const 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;
+int RSA_public_encrypt(int flen, const 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;
+int RSA_private_encrypt(int flen, const 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_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
+	     RSA *rsa, int padding)
 	{
 	return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
 	}
 
-int RSA_public_decrypt(flen, from, to, rsa, padding)
-int flen;
-unsigned char *from;
-unsigned char *to;
-RSA *rsa;
-int padding;
+int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
+	     RSA *rsa, int padding)
 	{
 	return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
 	}
 
+int RSA_flags(const RSA *r)
+	{
+	return((r == NULL)?0:r->meth->flags);
+	}
+
+void RSA_blinding_off(RSA *rsa)
+	{
+	if (rsa->blinding != NULL)
+		{
+		BN_BLINDING_free(rsa->blinding);
+		rsa->blinding=NULL;
+		}
+	rsa->flags &= ~RSA_FLAG_BLINDING;
+	rsa->flags |= RSA_FLAG_NO_BLINDING;
+	}
+
+int RSA_blinding_on(RSA *rsa, BN_CTX *ctx)
+	{
+	int ret=0;
+
+	if (rsa->blinding != NULL)
+		RSA_blinding_off(rsa);
+
+	rsa->blinding = RSA_setup_blinding(rsa, ctx);
+	if (rsa->blinding == NULL)
+		goto err;
+
+	rsa->flags |= RSA_FLAG_BLINDING;
+	rsa->flags &= ~RSA_FLAG_NO_BLINDING;
+	ret=1;
+err:
+	return(ret);
+	}
+
+static BIGNUM *rsa_get_public_exp(const BIGNUM *d, const BIGNUM *p,
+	const BIGNUM *q, BN_CTX *ctx)
+{
+	BIGNUM *ret = NULL, *r0, *r1, *r2;
+
+	if (d == NULL || p == NULL || q == NULL)
+		return NULL;
+
+	BN_CTX_start(ctx);
+	r0 = BN_CTX_get(ctx);
+	r1 = BN_CTX_get(ctx);
+	r2 = BN_CTX_get(ctx);
+	if (r2 == NULL)
+		goto err;
+
+	if (!BN_sub(r1, p, BN_value_one())) goto err;
+	if (!BN_sub(r2, q, BN_value_one())) goto err;
+	if (!BN_mul(r0, r1, r2, ctx)) goto err;
+
+	ret = BN_mod_inverse(NULL, d, r0, ctx);
+err:
+	BN_CTX_end(ctx);
+	return ret;
+}
+
+BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx)
+{
+	BIGNUM *e;
+	BN_CTX *ctx;
+	BN_BLINDING *ret = NULL;
+
+	if (in_ctx == NULL)
+		{
+		if ((ctx = BN_CTX_new()) == NULL) return 0;
+		}
+	else
+		ctx = in_ctx;
+
+	BN_CTX_start(ctx);
+	e  = BN_CTX_get(ctx);
+	if (e == NULL)
+		{
+		RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
+		goto err;
+		}
+
+	if (rsa->e == NULL)
+		{
+		e = rsa_get_public_exp(rsa->d, rsa->p, rsa->q, ctx);
+		if (e == NULL)
+			{
+			RSAerr(RSA_F_RSA_SETUP_BLINDING, RSA_R_NO_PUBLIC_EXPONENT);
+			goto err;
+			}
+		}
+	else
+		e = rsa->e;
+
+	
+	if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL)
+		{
+		/* if PRNG is not properly seeded, resort to secret
+		 * exponent as unpredictable seed */
+		RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0.0);
+		}
+
+	ret = BN_BLINDING_create_param(NULL, e, rsa->n, ctx,
+			rsa->meth->bn_mod_exp, rsa->_method_mod_n);
+	BN_BLINDING_set_thread_id(ret, CRYPTO_thread_id());
+err:
+	BN_CTX_end(ctx);
+	if (in_ctx == NULL)
+		BN_CTX_free(ctx);
+
+	return ret;
+}
+
+int RSA_memory_lock(RSA *r)
+	{
+	int i,j,k,off;
+	char *p;
+	BIGNUM *bn,**t[6],*b;
+	BN_ULONG *ul;
+
+	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)
+		{
+		RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
+		return(0);
+		}
+	bn=(BIGNUM *)p;
+	ul=(BN_ULONG *)&(p[off]);
+	for (i=0; i<6; i++)
+		{
+		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);
+		}
+	
+	/* I should fix this so it can still be done */
+	r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
+
+	r->bignum_data=p;
+	return(1);
+	}