Changes between 0.9.7g and 0.9.8 [xx XXX xxxx]
+ *) Add new functionality to the bn blinding code:
+ - automatic re-creation of the BN_BLINDING parameters after
+ a fixed number of uses (currently 32)
+ - add new function for parameter creation
+ - introduce flags to control the update behaviour of the
+ BN_BLINDING parameters
+ - hide BN_BLINDING structure
+ Add a second BN_BLINDING slot to the RSA structure to improve
+ performance when a single RSA object is shared among several
+ threads.
+ [Nils Larsch]
+
*) Add support for DTLS.
[Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
int flags;
};
-struct bn_blinding_st
- {
- int init;
- BIGNUM *A;
- BIGNUM *Ai;
- BIGNUM *mod; /* just a reference */
- unsigned long thread_id; /* added in OpenSSL 0.9.6j and 0.9.7b;
- * used only by crypto/rsa/rsa_eay.c, rsa_lib.c */
- };
-
/* Used for montgomery multiplication */
struct bn_mont_ctx_st
{
int BN_MONT_CTX_set(BN_MONT_CTX *mont,const BIGNUM *mod,BN_CTX *ctx);
BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to,BN_MONT_CTX *from);
-BN_BLINDING *BN_BLINDING_new(BIGNUM *A,BIGNUM *Ai,BIGNUM *mod);
+/* BN_BLINDING flags */
+#define BN_BLINDING_NO_UPDATE 0x00000001
+#define BN_BLINDING_NO_RECREATE 0x00000002
+
+BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod);
void BN_BLINDING_free(BN_BLINDING *b);
int BN_BLINDING_update(BN_BLINDING *b,BN_CTX *ctx);
-int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *r, BN_CTX *ctx);
+int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
+int BN_BLINDING_convert_ex(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *);
+int BN_BLINDING_invert_ex(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b, BN_CTX *);
+unsigned long BN_BLINDING_get_thread_id(const BN_BLINDING *);
+void BN_BLINDING_set_thread_id(BN_BLINDING *, unsigned long);
+unsigned long BN_BLINDING_get_flags(const BN_BLINDING *);
+void BN_BLINDING_set_flags(BN_BLINDING *, unsigned long);
+BN_BLINDING *BN_BLINDING_create_param(BN_BLINDING *b,
+ const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
+ int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+ const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx),
+ BN_MONT_CTX *m_ctx);
#ifndef OPENSSL_NO_DEPRECATED
void BN_set_params(int mul,int high,int low,int mont);
/* Function codes. */
#define BN_F_BNRAND 114
#define BN_F_BN_BLINDING_CONVERT 100
+#define BN_F_BN_BLINDING_CREATE_PARAM 133
#define BN_F_BN_BLINDING_INVERT 101
#define BN_F_BN_BLINDING_NEW 102
#define BN_F_BN_BLINDING_UPDATE 103
/* crypto/bn/bn_blind.c */
+/* ====================================================================
+ * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
#include "cryptlib.h"
#include "bn_lcl.h"
-BN_BLINDING *BN_BLINDING_new(BIGNUM *A, BIGNUM *Ai, BIGNUM *mod)
+#define BN_BLINDING_COUNTER 32
+
+struct bn_blinding_st
+ {
+ BIGNUM *A;
+ BIGNUM *Ai;
+ BIGNUM *e;
+ BIGNUM *mod; /* just a reference */
+ unsigned long thread_id; /* added in OpenSSL 0.9.6j and 0.9.7b;
+ * used only by crypto/rsa/rsa_eay.c, rsa_lib.c */
+ unsigned int counter;
+ unsigned long flags;
+ BN_MONT_CTX *m_ctx;
+ int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+ const BIGNUM *m, BN_CTX *ctx,
+ BN_MONT_CTX *m_ctx);
+ };
+
+BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod)
{
BN_BLINDING *ret=NULL;
- bn_check_top(Ai);
bn_check_top(mod);
if ((ret=(BN_BLINDING *)OPENSSL_malloc(sizeof(BN_BLINDING))) == NULL)
return(NULL);
}
memset(ret,0,sizeof(BN_BLINDING));
- if ((ret->A=BN_new()) == NULL) goto err;
- if ((ret->Ai=BN_new()) == NULL) goto err;
- if (!BN_copy(ret->A,A)) goto err;
- if (!BN_copy(ret->Ai,Ai)) goto err;
- ret->mod=mod;
+ if (A != NULL)
+ {
+ if ((ret->A = BN_dup(A)) == NULL) goto err;
+ }
+ if (Ai != NULL)
+ {
+ if ((ret->Ai = BN_dup(Ai)) == NULL) goto err;
+ }
+ ret->mod = mod;
+ ret->counter = BN_BLINDING_COUNTER;
return(ret);
err:
if (ret != NULL) BN_BLINDING_free(ret);
if (r->A != NULL) BN_free(r->A );
if (r->Ai != NULL) BN_free(r->Ai);
+ if (r->e != NULL) BN_free(r->e );
OPENSSL_free(r);
}
BNerr(BN_F_BN_BLINDING_UPDATE,BN_R_NOT_INITIALIZED);
goto err;
}
-
- if (!BN_mod_mul(b->A,b->A,b->A,b->mod,ctx)) goto err;
- if (!BN_mod_mul(b->Ai,b->Ai,b->Ai,b->mod,ctx)) goto err;
+
+ if (--(b->counter) == 0 && b->e != NULL &&
+ !(b->flags & BN_BLINDING_NO_RECREATE))
+ {
+ /* re-create blinding parameters */
+ if (!BN_BLINDING_create_param(b, NULL, NULL, ctx, NULL, NULL))
+ goto err;
+ }
+ else if (!(b->flags & BN_BLINDING_NO_UPDATE))
+ {
+ if (!BN_mod_mul(b->A,b->A,b->A,b->mod,ctx)) goto err;
+ if (!BN_mod_mul(b->Ai,b->Ai,b->Ai,b->mod,ctx)) goto err;
+ }
ret=1;
err:
+ if (b->counter == 0)
+ b->counter = BN_BLINDING_COUNTER;
return(ret);
}
int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx)
+ {
+ return BN_BLINDING_convert_ex(n, NULL, b, ctx);
+ }
+
+int BN_BLINDING_convert_ex(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *ctx)
{
bn_check_top(n);
BNerr(BN_F_BN_BLINDING_CONVERT,BN_R_NOT_INITIALIZED);
return(0);
}
- return(BN_mod_mul(n,n,b->A,b->mod,ctx));
+
+ if (r != NULL)
+ BN_copy(r, b->Ai);
+
+ return BN_mod_mul(n,n,b->A,b->mod,ctx);
}
int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx)
+ {
+ return BN_BLINDING_invert_ex(n, NULL, b, ctx);
+ }
+
+int BN_BLINDING_invert_ex(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b, BN_CTX *ctx)
{
int ret;
BNerr(BN_F_BN_BLINDING_INVERT,BN_R_NOT_INITIALIZED);
return(0);
}
- if ((ret=BN_mod_mul(n,n,b->Ai,b->mod,ctx)) >= 0)
+
+ if (r != NULL)
+ ret = BN_mod_mul(n, n, r, b->mod, ctx);
+ else
+ ret = BN_mod_mul(n, n, b->Ai, b->mod, ctx);
+
+ if (ret >= 0)
{
if (!BN_BLINDING_update(b,ctx))
return(0);
return(ret);
}
+unsigned long BN_BLINDING_get_thread_id(const BN_BLINDING *b)
+ {
+ return b->thread_id;
+ }
+
+void BN_BLINDING_set_thread_id(BN_BLINDING *b, unsigned long n)
+ {
+ b->thread_id = n;
+ }
+
+unsigned long BN_BLINDING_get_flags(const BN_BLINDING *b)
+ {
+ return b->flags;
+ }
+
+void BN_BLINDING_set_flags(BN_BLINDING *b, unsigned long flags)
+ {
+ b->flags = flags;
+ }
+
+BN_BLINDING *BN_BLINDING_create_param(BN_BLINDING *b,
+ const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
+ int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+ const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx),
+ BN_MONT_CTX *m_ctx)
+{
+ int retry_counter = 32;
+ BIGNUM *a, *ai;
+ BN_BLINDING *ret = NULL;
+
+ if (b == NULL)
+ ret = BN_BLINDING_new(NULL, NULL, m);
+ else
+ ret = b;
+
+ if (ret == NULL)
+ goto err;
+
+ if (ret->A == NULL && (ret->A = BN_new()) == NULL)
+ goto err;
+ if (ret->Ai == NULL && (ret->Ai = BN_new()) == NULL)
+ goto err;
+
+ if (e != NULL)
+ {
+ if (ret->e != NULL)
+ BN_free(ret->e);
+ ret->e = BN_dup(e);
+ }
+ if (ret->e == NULL)
+ goto err;
+
+ if (bn_mod_exp != NULL)
+ ret->bn_mod_exp = bn_mod_exp;
+ if (m_ctx != NULL)
+ ret->m_ctx = m_ctx;
+
+ do {
+ if (!BN_rand_range(ret->A, ret->mod)) goto err;
+ if (BN_mod_inverse(ret->Ai, ret->A, ret->mod, ctx) == NULL)
+ {
+ /* this should almost never happen for good RSA keys */
+ unsigned long error = ERR_peek_last_error();
+ if (ERR_GET_REASON(error) == BN_R_NO_INVERSE)
+ {
+ if (retry_counter-- == 0)
+ {
+ BNerr(BN_F_BN_BLINDING_CREATE_PARAM,
+ BN_R_TOO_MANY_ITERATIONS);
+ goto err;
+ }
+ ERR_clear_error();
+ }
+ else
+ goto err;
+ }
+ else
+ break;
+ } while (1);
+
+ if (ret->bn_mod_exp != NULL && ret->m_ctx != NULL)
+ {
+ if (!ret->bn_mod_exp(ret->A, ret->A, ret->e, ret->mod, ctx, ret->m_ctx))
+ goto err;
+ }
+ else
+ {
+ if (!BN_mod_exp(ret->A, ret->A, ret->e, ret->mod, ctx))
+ goto err;
+ }
+
+ return ret;
+err:
+ if (b == NULL && ret != NULL)
+ {
+ BN_BLINDING_free(ret);
+ ret = NULL;
+ }
+
+ return ret;
+}
+
{
{ERR_FUNC(BN_F_BNRAND), "BNRAND"},
{ERR_FUNC(BN_F_BN_BLINDING_CONVERT), "BN_BLINDING_convert"},
+{ERR_FUNC(BN_F_BN_BLINDING_CREATE_PARAM), "BN_BLINDING_create_param"},
{ERR_FUNC(BN_F_BN_BLINDING_INVERT), "BN_BLINDING_invert"},
{ERR_FUNC(BN_F_BN_BLINDING_NEW), "BN_BLINDING_new"},
{ERR_FUNC(BN_F_BN_BLINDING_UPDATE), "BN_BLINDING_update"},
* NULL */
char *bignum_data;
BN_BLINDING *blinding;
+ BN_BLINDING *mt_blinding;
};
#define RSA_3 0x3L
int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
void RSA_blinding_off(RSA *rsa);
+BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx);
int RSA_padding_add_PKCS1_type_1(unsigned char *to,int tlen,
const unsigned char *f,int fl);
#define RSA_F_RSA_PADDING_CHECK_SSLV23 114
#define RSA_F_RSA_PRINT 115
#define RSA_F_RSA_PRINT_FP 116
+#define RSA_F_RSA_SETUP_BLINDING 125
#define RSA_F_RSA_SIGN 117
#define RSA_F_RSA_SIGN_ASN1_OCTET_STRING 118
#define RSA_F_RSA_VERIFY 119
#define RSA_R_INVALID_MESSAGE_LENGTH 131
#define RSA_R_IQMP_NOT_INVERSE_OF_Q 126
#define RSA_R_KEY_SIZE_TOO_SMALL 120
+#define RSA_R_NO_PUBLIC_EXPONENT 133
#define RSA_R_NULL_BEFORE_BLOCK_MISSING 113
#define RSA_R_N_DOES_NOT_EQUAL_P_Q 127
#define RSA_R_OAEP_DECODING_ERROR 121
return(r);
}
-static int rsa_eay_blinding(RSA *rsa, BN_CTX *ctx)
- {
- int ret = 1;
- CRYPTO_w_lock(CRYPTO_LOCK_RSA);
- /* Check again inside the lock - the macro's check is racey */
- if(rsa->blinding == NULL)
- ret = RSA_blinding_on(rsa, ctx);
- CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
- return ret;
- }
+static BN_BLINDING *rsa_get_blinding(RSA *rsa, BIGNUM **r, int *local, BN_CTX *ctx)
+{
+ BN_BLINDING *ret;
-#define BLINDING_HELPER(rsa, ctx, err_instr) \
- do { \
- if((!((rsa)->flags & RSA_FLAG_NO_BLINDING)) && \
- ((rsa)->blinding == NULL) && \
- !rsa_eay_blinding(rsa, ctx)) \
- err_instr \
- } while(0)
+ if (rsa->blinding == NULL)
+ {
+ if (rsa->blinding == NULL)
+ {
+ CRYPTO_w_lock(CRYPTO_LOCK_RSA);
+ if (rsa->blinding == NULL)
+ rsa->blinding = RSA_setup_blinding(rsa, ctx);
+ CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
+ }
+ }
-static BN_BLINDING *setup_blinding(RSA *rsa, BN_CTX *ctx)
- {
- BIGNUM *A, *Ai;
- BN_BLINDING *ret = NULL;
+ ret = rsa->blinding;
+ if (ret == NULL)
+ return NULL;
- /* added in OpenSSL 0.9.6j and 0.9.7b */
+ if (BN_BLINDING_get_thread_id(ret) != CRYPTO_thread_id())
+ {
+ *local = 0;
+ if (rsa->mt_blinding == NULL)
+ {
+ CRYPTO_w_lock(CRYPTO_LOCK_RSA);
+ if (rsa->mt_blinding == NULL)
+ rsa->mt_blinding = RSA_setup_blinding(rsa, ctx);
+ CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
+ }
+ ret = rsa->mt_blinding;
+ }
+ else
+ *local = 1;
- /* NB: similar code appears in RSA_blinding_on (rsa_lib.c);
- * this should be placed in a new function of its own, but for reasons
- * of binary compatibility can't */
+ return ret;
+}
- BN_CTX_start(ctx);
- A = BN_CTX_get(ctx);
- if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL)
+static int rsa_blinding_convert(BN_BLINDING *b, int local, BIGNUM *f,
+ BIGNUM *r, BN_CTX *ctx)
+{
+ if (local)
+ return BN_BLINDING_convert_ex(f, NULL, b, ctx);
+ else
{
- /* 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);
- if (!BN_pseudo_rand_range(A,rsa->n)) goto err;
- }
+ int ret;
+ CRYPTO_w_lock(CRYPTO_LOCK_RSA_BLINDING);
+ ret = BN_BLINDING_convert_ex(f, r, b, ctx);
+ CRYPTO_w_unlock(CRYPTO_LOCK_RSA_BLINDING);
+ return ret;
+ }
+}
+
+static int rsa_blinding_invert(BN_BLINDING *b, int local, BIGNUM *f,
+ BIGNUM *r, BN_CTX *ctx)
+{
+ if (local)
+ return BN_BLINDING_invert_ex(f, NULL, b, ctx);
else
{
- if (!BN_rand_range(A,rsa->n)) goto err;
+ int ret;
+ CRYPTO_r_lock(CRYPTO_LOCK_RSA_BLINDING);
+ ret = BN_BLINDING_invert_ex(f, r, b, ctx);
+ CRYPTO_r_unlock(CRYPTO_LOCK_RSA_BLINDING);
+ return ret;
}
- 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;
- ret = BN_BLINDING_new(A,Ai,rsa->n);
- BN_free(Ai);
-err:
- BN_CTX_end(ctx);
- return ret;
- }
+}
/* signing */
static int RSA_eay_private_encrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
- BIGNUM *f,*ret;
+ BIGNUM *f, *ret, *br;
int i,j,k,num=0,r= -1;
unsigned char *buf=NULL;
BN_CTX *ctx=NULL;
if ((ctx=BN_CTX_new()) == NULL) goto err;
BN_CTX_start(ctx);
- f = BN_CTX_get(ctx);
+ f = BN_CTX_get(ctx);
+ br = BN_CTX_get(ctx);
ret = BN_CTX_get(ctx);
- num=BN_num_bytes(rsa->n);
+ num = BN_num_bytes(rsa->n);
buf = OPENSSL_malloc(num);
if(!f || !ret || !buf)
{
goto err;
}
- BLINDING_HELPER(rsa, ctx, goto err;);
- blinding = rsa->blinding;
-
- /* Now unless blinding is disabled, 'blinding' is non-NULL.
- * But the BN_BLINDING object may be owned by some other thread
- * (we don't want to keep it constant and we don't want to use
- * lots of locking to avoid race conditions, so only a single
- * thread can use it; other threads have to use local blinding
- * factors) */
if (!(rsa->flags & RSA_FLAG_NO_BLINDING))
{
+ blinding = rsa_get_blinding(rsa, &br, &local_blinding, ctx);
if (blinding == NULL)
{
RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_INTERNAL_ERROR);
}
if (blinding != NULL)
- {
- if (blinding->thread_id != CRYPTO_thread_id())
- {
- /* we need a local one-time blinding factor */
-
- blinding = setup_blinding(rsa, ctx);
- if (blinding == NULL)
- goto err;
- local_blinding = 1;
- }
- }
-
- if (blinding)
- if (!BN_BLINDING_convert(f, blinding, ctx)) goto err;
+ if (!rsa_blinding_convert(blinding, local_blinding, f, br, ctx))
+ goto err;
if ( (rsa->flags & RSA_FLAG_EXT_PKEY) ||
((rsa->p != NULL) &&
}
if (blinding)
- if (!BN_BLINDING_invert(ret, blinding, ctx)) goto err;
+ if (!rsa_blinding_invert(blinding, local_blinding, ret, br, ctx))
+ goto err;
/* put in leading 0 bytes if the number is less than the
* length of the modulus */
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
- if (local_blinding)
- BN_BLINDING_free(blinding);
if (buf != NULL)
{
OPENSSL_cleanse(buf,num);
static int RSA_eay_private_decrypt(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding)
{
- BIGNUM *f,*ret;
+ BIGNUM *f, *ret, *br;
int j,num=0,r= -1;
unsigned char *p;
unsigned char *buf=NULL;
if((ctx = BN_CTX_new()) == NULL) goto err;
BN_CTX_start(ctx);
- f = BN_CTX_get(ctx);
+ f = BN_CTX_get(ctx);
+ br = BN_CTX_get(ctx);
ret = BN_CTX_get(ctx);
- num=BN_num_bytes(rsa->n);
+ num = BN_num_bytes(rsa->n);
buf = OPENSSL_malloc(num);
if(!f || !ret || !buf)
{
goto err;
}
- BLINDING_HELPER(rsa, ctx, goto err;);
- blinding = rsa->blinding;
-
- /* Now unless blinding is disabled, 'blinding' is non-NULL.
- * But the BN_BLINDING object may be owned by some other thread
- * (we don't want to keep it constant and we don't want to use
- * lots of locking to avoid race conditions, so only a single
- * thread can use it; other threads have to use local blinding
- * factors) */
if (!(rsa->flags & RSA_FLAG_NO_BLINDING))
{
+ blinding = rsa_get_blinding(rsa, &br, &local_blinding, ctx);
if (blinding == NULL)
{
- RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT, ERR_R_INTERNAL_ERROR);
+ RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_INTERNAL_ERROR);
goto err;
}
}
if (blinding != NULL)
- {
- if (blinding->thread_id != CRYPTO_thread_id())
- {
- /* we need a local one-time blinding factor */
-
- blinding = setup_blinding(rsa, ctx);
- if (blinding == NULL)
- goto err;
- local_blinding = 1;
- }
- }
-
- if (blinding)
- if (!BN_BLINDING_convert(f, blinding, ctx)) goto err;
+ if (!rsa_blinding_convert(blinding, local_blinding, f, br, ctx))
+ goto err;
/* do the decrypt */
if ( (rsa->flags & RSA_FLAG_EXT_PKEY) ||
}
if (blinding)
- if (!BN_BLINDING_invert(ret, blinding, ctx)) goto err;
+ if (!rsa_blinding_invert(blinding, local_blinding, ret, br, ctx))
+ goto err;
p=buf;
j=BN_bn2bin(ret,p); /* j is only used with no-padding mode */
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
- if (local_blinding)
- BN_BLINDING_free(blinding);
if (buf != NULL)
{
OPENSSL_cleanse(buf,num);
{ERR_FUNC(RSA_F_RSA_PADDING_CHECK_SSLV23), "RSA_padding_check_SSLv23"},
{ERR_FUNC(RSA_F_RSA_PRINT), "RSA_print"},
{ERR_FUNC(RSA_F_RSA_PRINT_FP), "RSA_print_fp"},
+{ERR_FUNC(RSA_F_RSA_SETUP_BLINDING), "RSA_setup_blinding"},
{ERR_FUNC(RSA_F_RSA_SIGN), "RSA_sign"},
{ERR_FUNC(RSA_F_RSA_SIGN_ASN1_OCTET_STRING), "RSA_sign_ASN1_OCTET_STRING"},
{ERR_FUNC(RSA_F_RSA_VERIFY), "RSA_verify"},
{ERR_REASON(RSA_R_INVALID_MESSAGE_LENGTH),"invalid message length"},
{ERR_REASON(RSA_R_IQMP_NOT_INVERSE_OF_Q) ,"iqmp not inverse of q"},
{ERR_REASON(RSA_R_KEY_SIZE_TOO_SMALL) ,"key size too small"},
+{ERR_REASON(RSA_R_NO_PUBLIC_EXPONENT) ,"no public exponent"},
{ERR_REASON(RSA_R_NULL_BEFORE_BLOCK_MISSING),"null before block missing"},
{ERR_REASON(RSA_R_N_DOES_NOT_EQUAL_P_Q) ,"n does not equal p q"},
{ERR_REASON(RSA_R_OAEP_DECODING_ERROR) ,"oaep decoding error"},
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 (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);
+ 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);
}
rsa->flags |= RSA_FLAG_NO_BLINDING;
}
-int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
+int RSA_blinding_on(RSA *rsa, BN_CTX *ctx)
{
- BIGNUM *A,*Ai = NULL;
- BN_CTX *ctx;
int ret=0;
- if (p_ctx == NULL)
+ 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) goto err;
+ if ((ctx = BN_CTX_new()) == NULL) return 0;
}
else
- ctx=p_ctx;
+ ctx = in_ctx;
- /* XXXXX: Shouldn't this be RSA_blinding_off(rsa)? */
- if (rsa->blinding != NULL)
+ BN_CTX_start(ctx);
+ e = BN_CTX_get(ctx);
+ if (e == NULL)
{
- BN_BLINDING_free(rsa->blinding);
- rsa->blinding = NULL;
+ RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
+ goto err;
}
- /* NB: similar code appears in setup_blinding (rsa_eay.c);
- * this should be placed in a new function of its own, but for reasons
- * of binary compatibility can't */
-
- BN_CTX_start(ctx);
- A = BN_CTX_get(ctx);
- if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL)
+ if (rsa->e == 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);
- if (!BN_pseudo_rand_range(A,rsa->n)) goto err;
+ 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 (!BN_rand_range(A,rsa->n)) goto err;
+ /* 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);
}
- 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;
- if ((rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n)) == NULL) goto err;
- /* to make things thread-safe without excessive locking,
- * rsa->blinding will be used just by the current thread: */
- rsa->blinding->thread_id = CRYPTO_thread_id();
- rsa->flags |= RSA_FLAG_BLINDING;
- rsa->flags &= ~RSA_FLAG_NO_BLINDING;
- ret=1;
+ 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:
- if (Ai != NULL) BN_free(Ai);
BN_CTX_end(ctx);
- if (ctx != p_ctx) BN_CTX_free(ctx);
- return(ret);
- }
+ if (in_ctx == NULL)
+ BN_CTX_free(ctx);
+
+ return ret;
+}
int RSA_memory_lock(RSA *r)
{
BIO_new_dgram 3705 EXIST::FUNCTION:
BIO_s_datagram 3706 EXIST::FUNCTION:DGRAM
BIO_dgram_non_fatal_error 3707 EXIST::FUNCTION:
+RSA_setup_blinding 3708 EXIST::FUNCTION:RSA
+BN_BLINDING_set_thread_id 3709 EXIST::FUNCTION:
+BN_BLINDING_convert_ex 3710 EXIST::FUNCTION:
+BN_BLINDING_create_param 3711 EXIST::FUNCTION:
+BN_BLINDING_set_flags 3712 EXIST::FUNCTION:
+BN_BLINDING_invert_ex 3713 EXIST::FUNCTION:
+BN_BLINDING_get_thread_id 3714 EXIST::FUNCTION:
+BN_BLINDING_get_flags 3715 EXIST::FUNCTION:
projects / openssl.git / commitdiff