X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Frsa%2Frsa_lib.c;h=87a326184ca267c154d989e937f6844ae6e4e075;hp=6732e9832f6737fdad203549cda8261dedf01ebd;hb=b84e12266f85156f58804ff94ea110890f13b52d;hpb=6b691a5c85ddc4e407e32781841fee5c029506cd diff --git a/crypto/rsa/rsa_lib.c b/crypto/rsa/rsa_lib.c index 6732e9832f..87a326184c 100644 --- a/crypto/rsa/rsa_lib.c +++ b/crypto/rsa/rsa_lib.c @@ -1,309 +1,355 @@ -/* crypto/rsa/rsa_lib.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. 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.] + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include -#include "crypto.h" -#include "cryptlib.h" -#include "lhash.h" -#include "bn.h" -#include "rsa.h" +#include +#include "internal/cryptlib.h" +#include +#include "internal/bn_int.h" +#include +#include +#include "rsa_locl.h" -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(void) - { - return(RSA_new_method(NULL)); - } - -void RSA_set_default_method(RSA_METHOD *meth) - { - default_RSA_meth=meth; - } - -RSA *RSA_new_method(RSA_METHOD *meth) - { - RSA *ret; - - if (default_RSA_meth == NULL) - { -#ifdef RSAref - default_RSA_meth=RSA_PKCS1_RSAref(); +{ + RSA *r = RSA_new_method(NULL); + + return r; +} + +void RSA_set_default_method(const RSA_METHOD *meth) +{ + default_RSA_meth = meth; +} + +const RSA_METHOD *RSA_get_default_method(void) +{ + if (default_RSA_meth == NULL) { +#ifdef RSA_NULL + default_RSA_meth = RSA_null_method(); #else - default_RSA_meth=RSA_PKCS1_SSLeay(); + default_RSA_meth = RSA_PKCS1_OpenSSL(); #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; - ret->blinding=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,(char *)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); + } + + 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 + ENGINE_finish(rsa->engine); + rsa->engine = NULL; #endif - if (i > 0) return; -#ifdef REF_CHECK - if (i < 0) - { - fprintf(stderr,"RSA_free, bad reference count\n"); - abort(); - } + rsa->meth = meth; + if (meth->init) + meth->init(rsa); + return 1; +} + +RSA *RSA_new_method(ENGINE *engine) +{ + RSA *ret = OPENSSL_zalloc(sizeof(*ret)); + + if (ret == NULL) { + RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + return NULL; + } + + ret->references = 1; + ret->lock = CRYPTO_THREAD_lock_new(); + if (ret->lock == NULL) { + RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + OPENSSL_free(ret); + return NULL; + } + + ret->meth = RSA_get_default_method(); +#ifndef OPENSSL_NO_ENGINE + ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; + if (engine) { + if (!ENGINE_init(engine)) { + RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); + goto err; + } + ret->engine = engine; + } else + ret->engine = ENGINE_get_default_RSA(); + if (ret->engine) { + ret->meth = ENGINE_get_RSA(ret->engine); + if (ret->meth == NULL) { + RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); + goto err; + } + } #endif - CRYPTO_free_ex_data(rsa_meth,(char *)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); - if (r->blinding != NULL) BN_BLINDING_free(r->blinding); - if (r->bignum_data != NULL) Free_locked(r->bignum_data); - Free(r); - } - -int RSA_get_ex_new_index(long argl, char *argp, int (*new_func)(), - int (*dup_func)(), void (*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)); - } + ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; + if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) { + goto err; + } + + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { + RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_INIT_FAIL); + goto err; + } + + return ret; -int RSA_set_ex_data(RSA *r, int idx, char *arg) - { - return(CRYPTO_set_ex_data(&r->ex_data,idx,arg)); - } - -char *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) - { - if (rsa->blinding != NULL) - { - BN_BLINDING_free(rsa->blinding); - rsa->blinding=NULL; - } - 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; - - if (rsa->blinding != NULL) - BN_BLINDING_free(rsa->blinding); - - 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(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->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); - } + RSA_free(ret); + return NULL; +} -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); - } +void RSA_free(RSA *r) +{ + int i; + + if (r == NULL) + return; + + CRYPTO_atomic_add(&r->references, -1, &i, r->lock); + REF_PRINT_COUNT("RSA", r); + if (i > 0) + return; + REF_ASSERT_ISNT(i < 0); + + if (r->meth->finish) + r->meth->finish(r); +#ifndef OPENSSL_NO_ENGINE + ENGINE_finish(r->engine); +#endif + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); + + CRYPTO_THREAD_lock_free(r->lock); + + BN_clear_free(r->n); + BN_clear_free(r->e); + BN_clear_free(r->d); + BN_clear_free(r->p); + BN_clear_free(r->q); + BN_clear_free(r->dmp1); + BN_clear_free(r->dmq1); + BN_clear_free(r->iqmp); + BN_BLINDING_free(r->blinding); + BN_BLINDING_free(r->mt_blinding); + OPENSSL_free(r->bignum_data); + OPENSSL_free(r); +} + +int RSA_up_ref(RSA *r) +{ + int i; + + if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0) + return 0; + + REF_PRINT_COUNT("RSA", r); + REF_ASSERT_ISNT(i < 2); + return ((i > 1) ? 1 : 0); +} + +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_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 = bn_sizeof_BIGNUM() * 6; + off = k / sizeof(BN_ULONG) + 1; + j = 1; + for (i = 0; i < 6; i++) + j += bn_get_top(*t[i]); + if ((p = OPENSSL_malloc((off + j) * sizeof(*p))) == NULL) { + RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE); + return (0); + } + memset(p, 0, sizeof(*p) * (off + j)); + bn = (BIGNUM *)p; + ul = (BN_ULONG *)&(p[off]); + for (i = 0; i < 6; i++) { + b = *(t[i]); + *(t[i]) = bn_array_el(bn, i); + memcpy(bn_array_el(bn, i), b, bn_sizeof_BIGNUM()); + memcpy(ul, bn_get_words(b), sizeof(*ul) * bn_get_top(b)); + bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b)); + ul += bn_get_top(b); + 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); +} + +int RSA_security_bits(const RSA *rsa) +{ + return BN_security_bits(BN_num_bits(rsa->n), -1); +} + +int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) +{ + /* If the fields n and e in r are NULL, the corresponding input + * parameters MUST be non-NULL for n and e. d may be + * left NULL (in case only the public key is used). + */ + if ((r->n == NULL && n == NULL) + || (r->e == NULL && e == NULL)) + return 0; + + if (n != NULL) { + BN_free(r->n); + r->n = n; + } + if (e != NULL) { + BN_free(r->e); + r->e = e; + } + if (d != NULL) { + BN_free(r->d); + r->d = d; + } + + return 1; +} + +int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q) +{ + /* If the fields p and q in r are NULL, the corresponding input + * parameters MUST be non-NULL. + */ + if ((r->p == NULL && p == NULL) + || (r->q == NULL && q == NULL)) + return 0; + + if (p != NULL) { + BN_free(r->p); + r->p = p; + } + if (q != NULL) { + BN_free(r->q); + r->q = q; + } + + return 1; +} + +int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp) +{ + /* If the fields dmp1, dmq1 and iqmp in r are NULL, the corresponding input + * parameters MUST be non-NULL. + */ + if ((r->dmp1 == NULL && dmp1 == NULL) + || (r->dmq1 == NULL && dmq1 == NULL) + || (r->iqmp == NULL && iqmp == NULL)) + return 0; + + if (dmp1 != NULL) { + BN_free(r->dmp1); + r->dmp1 = dmp1; + } + if (dmq1 != NULL) { + BN_free(r->dmq1); + r->dmq1 = dmq1; + } + if (iqmp != NULL) { + BN_free(r->iqmp); + r->iqmp = iqmp; + } + + return 1; +} + +void RSA_get0_key(const RSA *r, + const BIGNUM **n, const BIGNUM **e, const BIGNUM **d) +{ + if (n != NULL) + *n = r->n; + if (e != NULL) + *e = r->e; + if (d != NULL) + *d = r->d; +} + +void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q) +{ + if (p != NULL) + *p = r->p; + if (q != NULL) + *q = r->q; +} + +void RSA_get0_crt_params(const RSA *r, + const BIGNUM **dmp1, const BIGNUM **dmq1, + const BIGNUM **iqmp) +{ + if (dmp1 != NULL) + *dmp1 = r->dmp1; + if (dmq1 != NULL) + *dmq1 = r->dmq1; + if (iqmp != NULL) + *iqmp = r->iqmp; +} + +void RSA_clear_flags(RSA *r, int flags) +{ + r->flags &= ~flags; +} + +int RSA_test_flags(const RSA *r, int flags) +{ + return r->flags & flags; +} + +void RSA_set_flags(RSA *r, int flags) +{ + r->flags |= flags; +} + +ENGINE *RSA_get0_engine(RSA *r) +{ + return r->engine; +}