crypto/rsa/rsa_lib.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <openssl/crypto.h>
  12 #include "internal/cryptlib.h"
  13 #include <openssl/lhash.h>
  14 #include "internal/bn_int.h"
  15 #include <openssl/engine.h>
  16 #include <openssl/evp.h>
  17 #include "internal/evp_int.h"
  18 #include "rsa_locl.h"
  19
  20 RSA *RSA_new(void)
  21 {
  22     return RSA_new_method(NULL);
  23 }
  24
  25 const RSA_METHOD *RSA_get_method(const RSA *rsa)
  26 {
  27     return rsa->meth;
  28 }
  29
  30 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
  31 {
  32     /*
  33      * NB: The caller is specifically setting a method, so it's not up to us
  34      * to deal with which ENGINE it comes from.
  35      */
  36     const RSA_METHOD *mtmp;
  37     mtmp = rsa->meth;
  38     if (mtmp->finish)
  39         mtmp->finish(rsa);
  40 #ifndef OPENSSL_NO_ENGINE
  41     ENGINE_finish(rsa->engine);
  42     rsa->engine = NULL;
  43 #endif
  44     rsa->meth = meth;
  45     if (meth->init)
  46         meth->init(rsa);
  47     return 1;
  48 }
  49
  50 RSA *RSA_new_method(ENGINE *engine)
  51 {
  52     RSA *ret = OPENSSL_zalloc(sizeof(*ret));
  53
  54     if (ret == NULL) {
  55         RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
  56         return NULL;
  57     }
  58
  59     ret->references = 1;
  60     ret->lock = CRYPTO_THREAD_lock_new();
  61     if (ret->lock == NULL) {
  62         RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
  63         OPENSSL_free(ret);
  64         return NULL;
  65     }
  66
  67     ret->meth = RSA_get_default_method();
  68 #ifndef OPENSSL_NO_ENGINE
  69     ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
  70     if (engine) {
  71         if (!ENGINE_init(engine)) {
  72             RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
  73             goto err;
  74         }
  75         ret->engine = engine;
  76     } else
  77         ret->engine = ENGINE_get_default_RSA();
  78     if (ret->engine) {
  79         ret->meth = ENGINE_get_RSA(ret->engine);
  80         if (ret->meth == NULL) {
  81             RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
  82             goto err;
  83         }
  84     }
  85 #endif
  86
  87     ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
  88     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
  89         goto err;
  90     }
  91
  92     if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
  93         RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_INIT_FAIL);
  94         goto err;
  95     }
  96
  97     return ret;
  98
  99 err:
 100     RSA_free(ret);
 101     return NULL;
 102 }
 103
 104 void RSA_free(RSA *r)
 105 {
 106     int i;
 107
 108     if (r == NULL)
 109         return;
 110
 111     CRYPTO_DOWN_REF(&r->references, &i, r->lock);
 112     REF_PRINT_COUNT("RSA", r);
 113     if (i > 0)
 114         return;
 115     REF_ASSERT_ISNT(i < 0);
 116
 117     if (r->meth->finish)
 118         r->meth->finish(r);
 119 #ifndef OPENSSL_NO_ENGINE
 120     ENGINE_finish(r->engine);
 121 #endif
 122
 123     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
 124
 125     CRYPTO_THREAD_lock_free(r->lock);
 126
 127     BN_clear_free(r->n);
 128     BN_clear_free(r->e);
 129     BN_clear_free(r->d);
 130     BN_clear_free(r->p);
 131     BN_clear_free(r->q);
 132     BN_clear_free(r->dmp1);
 133     BN_clear_free(r->dmq1);
 134     BN_clear_free(r->iqmp);
 135     RSA_PSS_PARAMS_free(r->pss);
 136     BN_BLINDING_free(r->blinding);
 137     BN_BLINDING_free(r->mt_blinding);
 138     OPENSSL_free(r->bignum_data);
 139     OPENSSL_free(r);
 140 }
 141
 142 int RSA_up_ref(RSA *r)
 143 {
 144     int i;
 145
 146     if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0)
 147         return 0;
 148
 149     REF_PRINT_COUNT("RSA", r);
 150     REF_ASSERT_ISNT(i < 2);
 151     return ((i > 1) ? 1 : 0);
 152 }
 153
 154 int RSA_set_ex_data(RSA *r, int idx, void *arg)
 155 {
 156     return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
 157 }
 158
 159 void *RSA_get_ex_data(const RSA *r, int idx)
 160 {
 161     return (CRYPTO_get_ex_data(&r->ex_data, idx));
 162 }
 163
 164 int RSA_security_bits(const RSA *rsa)
 165 {
 166     return BN_security_bits(BN_num_bits(rsa->n), -1);
 167 }
 168
 169 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
 170 {
 171     /* If the fields n and e in r are NULL, the corresponding input
 172      * parameters MUST be non-NULL for n and e.  d may be
 173      * left NULL (in case only the public key is used).
 174      */
 175     if ((r->n == NULL && n == NULL)
 176         || (r->e == NULL && e == NULL))
 177         return 0;
 178
 179     if (n != NULL) {
 180         BN_free(r->n);
 181         r->n = n;
 182     }
 183     if (e != NULL) {
 184         BN_free(r->e);
 185         r->e = e;
 186     }
 187     if (d != NULL) {
 188         BN_free(r->d);
 189         r->d = d;
 190     }
 191
 192     return 1;
 193 }
 194
 195 int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
 196 {
 197     /* If the fields p and q in r are NULL, the corresponding input
 198      * parameters MUST be non-NULL.
 199      */
 200     if ((r->p == NULL && p == NULL)
 201         || (r->q == NULL && q == NULL))
 202         return 0;
 203
 204     if (p != NULL) {
 205         BN_free(r->p);
 206         r->p = p;
 207     }
 208     if (q != NULL) {
 209         BN_free(r->q);
 210         r->q = q;
 211     }
 212
 213     return 1;
 214 }
 215
 216 int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
 217 {
 218     /* If the fields dmp1, dmq1 and iqmp in r are NULL, the corresponding input
 219      * parameters MUST be non-NULL.
 220      */
 221     if ((r->dmp1 == NULL && dmp1 == NULL)
 222         || (r->dmq1 == NULL && dmq1 == NULL)
 223         || (r->iqmp == NULL && iqmp == NULL))
 224         return 0;
 225
 226     if (dmp1 != NULL) {
 227         BN_free(r->dmp1);
 228         r->dmp1 = dmp1;
 229     }
 230     if (dmq1 != NULL) {
 231         BN_free(r->dmq1);
 232         r->dmq1 = dmq1;
 233     }
 234     if (iqmp != NULL) {
 235         BN_free(r->iqmp);
 236         r->iqmp = iqmp;
 237     }
 238
 239     return 1;
 240 }
 241
 242 void RSA_get0_key(const RSA *r,
 243                   const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
 244 {
 245     if (n != NULL)
 246         *n = r->n;
 247     if (e != NULL)
 248         *e = r->e;
 249     if (d != NULL)
 250         *d = r->d;
 251 }
 252
 253 void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q)
 254 {
 255     if (p != NULL)
 256         *p = r->p;
 257     if (q != NULL)
 258         *q = r->q;
 259 }
 260
 261 void RSA_get0_crt_params(const RSA *r,
 262                          const BIGNUM **dmp1, const BIGNUM **dmq1,
 263                          const BIGNUM **iqmp)
 264 {
 265     if (dmp1 != NULL)
 266         *dmp1 = r->dmp1;
 267     if (dmq1 != NULL)
 268         *dmq1 = r->dmq1;
 269     if (iqmp != NULL)
 270         *iqmp = r->iqmp;
 271 }
 272
 273 void RSA_clear_flags(RSA *r, int flags)
 274 {
 275     r->flags &= ~flags;
 276 }
 277
 278 int RSA_test_flags(const RSA *r, int flags)
 279 {
 280     return r->flags & flags;
 281 }
 282
 283 void RSA_set_flags(RSA *r, int flags)
 284 {
 285     r->flags |= flags;
 286 }
 287
 288 ENGINE *RSA_get0_engine(const RSA *r)
 289 {
 290     return r->engine;
 291 }
 292
 293 int RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2)
 294 {
 295     /* If key type not RSA or RSA-PSS return error */
 296     if (ctx != NULL && ctx->pmeth != NULL
 297         && ctx->pmeth->pkey_id != EVP_PKEY_RSA
 298         && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
 299         return -1;
 300      return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2);
 301 }