--- /dev/null
+/*
+ * Copyright (c) 2000-2001,2011,2014 Apple Inc. All Rights Reserved.
+ *
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please obtain
+ * a copy of the License at http://www.apple.com/publicsource and read it before
+ * using this file.
+ *
+ * This Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
+ * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
+ * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
+ * specific language governing rights and limitations under the License.
+ */
+
+
+/* crypto/rsa/rsa_lib.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <openssl/crypto.h>
+#include "cryptlib.h"
+#include <openssl/lhash.h>
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <pthread.h>
+
+const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT;
+
+static const RSA_METHOD *default_RSA_meth=NULL;
+static int rsa_meth_num=0;
+static STACK_OF(CRYPTO_EX_DATA_FUNCS) *rsa_meth=NULL;
+
+RSA *RSA_new(void)
+ {
+ return(RSA_new_method(NULL));
+ }
+
+void RSA_set_default_method(const RSA_METHOD *meth)
+ {
+ default_RSA_meth=meth;
+ }
+
+const RSA_METHOD *RSA_get_default_method(void)
+{
+ return default_RSA_meth;
+}
+
+const RSA_METHOD *RSA_get_method(RSA *rsa)
+{
+ return rsa->meth;
+}
+
+const RSA_METHOD *RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
+{
+ const RSA_METHOD *mtmp;
+ mtmp = rsa->meth;
+ if (mtmp->finish) mtmp->finish(rsa);
+ rsa->meth = meth;
+ if (meth->init) meth->init(rsa);
+ return mtmp;
+}
+
+RSA *RSA_new_method(const RSA_METHOD *meth)
+ {
+ RSA *ret;
+
+ if (default_RSA_meth == NULL)
+ {
+#ifdef RSA_NULL
+ default_RSA_meth=RSA_null_method();
+#else
+#ifdef RSAref
+ default_RSA_meth=RSA_PKCS1_RSAref();
+#else
+ default_RSA_meth=RSA_PKCS1_SSLeay();
+#endif
+#endif
+ }
+ ret=(RSA *)Malloc(sizeof(RSA));
+ if (ret == NULL)
+ {
+ RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
+ return(NULL);
+ }
+
+ if (meth == NULL)
+ ret->meth=default_RSA_meth;
+ else
+ ret->meth=meth;
+
+ ret->pad=0;
+ ret->version=0;
+ ret->n=NULL;
+ ret->e=NULL;
+ ret->d=NULL;
+ ret->p=NULL;
+ ret->q=NULL;
+ ret->dmp1=NULL;
+ ret->dmq1=NULL;
+ ret->iqmp=NULL;
+ ret->references=1;
+ ret->_method_mod_n=NULL;
+ ret->_method_mod_p=NULL;
+ ret->_method_mod_q=NULL;
+
+ // make blinding per thread
+ ret->num_blinding_threads = 0;
+ pthread_mutex_init(&ret->blinding_mutex, NULL);
+ ret->blinding_array = NULL;
+
+ ret->bignum_data=NULL;
+ ret->flags=ret->meth->flags;
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret))
+ {
+ Free(ret);
+ ret=NULL;
+ }
+ else
+ CRYPTO_new_ex_data(rsa_meth,ret,&ret->ex_data);
+ return(ret);
+ }
+
+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)
+ {
+ fprintf(stderr,"RSA_free, bad reference count\n");
+ abort();
+ }
+#endif
+
+ CRYPTO_free_ex_data(rsa_meth,r,&r->ex_data);
+
+ if (r->meth->finish != NULL)
+ r->meth->finish(r);
+
+ if (r->n != NULL) BN_clear_free(r->n);
+ if (r->e != NULL) BN_clear_free(r->e);
+ if (r->d != NULL) BN_clear_free(r->d);
+ if (r->p != NULL) BN_clear_free(r->p);
+ if (r->q != NULL) BN_clear_free(r->q);
+ 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);
+ RSA_free_thread_blinding_ptr(r);
+ if (r->bignum_data != NULL) Free_locked(r->bignum_data);
+ Free(r);
+ }
+
+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));
+ }
+
+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(RSA *r, int idx)
+ {
+ return(CRYPTO_get_ex_data(&r->ex_data,idx));
+ }
+
+int RSA_size(RSA *r)
+ {
+ return(BN_num_bytes(r->n));
+ }
+
+int RSA_public_encrypt(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(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(int flen, 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(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(RSA *r)
+ {
+ return((r == NULL)?0:r->meth->flags);
+ }
+
+void RSA_blinding_off(RSA *rsa)
+ {
+ RSA_free_thread_blinding_ptr(rsa);
+ rsa->flags&= ~RSA_FLAG_BLINDING;
+ }
+
+int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
+ {
+ BIGNUM *A,*Ai;
+ BN_CTX *ctx;
+ int ret=0;
+
+ if (p_ctx == NULL)
+ {
+ if ((ctx=BN_CTX_new()) == NULL) goto err;
+ }
+ else
+ ctx=p_ctx;
+
+ RSA_free_thread_blinding_ptr(rsa);
+
+ BN_CTX_start(ctx);
+ A = BN_CTX_get(ctx);
+ if (!BN_rand(A,BN_num_bits(rsa->n)-1,1,0)) goto err;
+ if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
+
+ if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
+ goto err;
+ RSA_set_thread_blinding_ptr(rsa, BN_BLINDING_new(A,Ai,rsa->n));
+ rsa->flags|=RSA_FLAG_BLINDING;
+ BN_free(Ai);
+ ret=1;
+err:
+ BN_CTX_end(ctx);
+ if (ctx != p_ctx) 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=Malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
+ {
+ RSAerr(RSA_F_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);
+ }
+
+struct BN_BLINDING_STRUCT
+{
+ pthread_t thread_ID;
+ BN_BLINDING* blinding;
+};
+
+
+
+static struct BN_BLINDING_STRUCT* RSA_get_blinding_struct(RSA *r)
+{
+ // look for storage for the current thread
+ pthread_t current = pthread_self();
+
+ int i;
+ for (i = 0; i < r->num_blinding_threads; ++i)
+ {
+ if (pthread_equal(current, r->blinding_array[i].thread_ID)) // do we have storage for this thread?
+ {
+ return &(r->blinding_array[i]);
+ break;
+ }
+ }
+
+ return NULL;
+}
+
+typedef struct BN_BLINDING_STRUCT BN_BLINDING_STRUCT;
+
+
+BN_BLINDING* RSA_get_thread_blinding_ptr(RSA *r)
+{
+ // lock down the structure
+ pthread_mutex_lock(&r->blinding_mutex);
+
+ BN_BLINDING* result = NULL;
+ BN_BLINDING_STRUCT *st = RSA_get_blinding_struct(r);
+ if (st != NULL)
+ {
+ result = st->blinding;
+ }
+
+ pthread_mutex_unlock(&r->blinding_mutex);
+
+ return result;
+}
+
+
+
+void RSA_set_thread_blinding_ptr(RSA *r, BN_BLINDING* bnb)
+{
+ // lock down the structure
+ pthread_mutex_lock(&r->blinding_mutex);
+
+ // see if there is an existing record for this thread
+ BN_BLINDING_STRUCT *st = RSA_get_blinding_struct(r);
+ if (st == NULL)
+ {
+ // add a new blinding struct
+ int last_member = r->num_blinding_threads;
+ r->num_blinding_threads += 1;
+ r->blinding_array = (BN_BLINDING_STRUCT*) realloc(r->blinding_array, sizeof(BN_BLINDING_STRUCT) * r->num_blinding_threads);
+ st = &r->blinding_array[last_member];
+ }
+
+ st->thread_ID = pthread_self();
+ st->blinding = bnb;
+
+ pthread_mutex_unlock(&r->blinding_mutex);
+}
+
+
+
+void RSA_free_thread_blinding_ptr(RSA *r)
+{
+ // look for storage for the current thread
+ pthread_t current = pthread_self();
+
+ int i;
+ for (i = 0; i < r->num_blinding_threads; ++i)
+ {
+ if (pthread_equal(current, r->blinding_array[i].thread_ID)) // do we have storage for this thread?
+ {
+ BN_BLINDING_free(r->blinding_array[i].blinding);
+
+ int new_count = r->num_blinding_threads - 1;
+ if (new_count == 0)
+ {
+ // no more thread storage, just blow our array away
+ free(r->blinding_array);
+ r->blinding_array = NULL;
+ r->num_blinding_threads = 0;
+ }
+ else
+ {
+ r->blinding_array[i] = r->blinding_array[new_count];
+ r->num_blinding_threads = new_count;
+ }
+ break;
+ }
+ }
+}
projects / apple / security.git / blobdiff