providers/implementations/serializers/serializer_rsa_priv.c

   1 /*
   2  * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 /*
  11  * RSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <openssl/core_dispatch.h>
  17 #include <openssl/core_names.h>
  18 #include <openssl/err.h>
  19 #include <openssl/pem.h>
  20 #include <openssl/rsa.h>
  21 #include <openssl/types.h>
  22 #include <openssl/params.h>
  23 #include <openssl/safestack.h>
  24 #include "crypto/rsa.h"
  25 #include "prov/bio.h"
  26 #include "prov/implementations.h"
  27 #include "prov/providercommonerr.h"
  28 #include "prov/provider_ctx.h"
  29 #include "serializer_local.h"
  30
  31 static OSSL_FUNC_serializer_newctx_fn rsa_priv_newctx;
  32 static OSSL_FUNC_serializer_freectx_fn rsa_priv_freectx;
  33 static OSSL_FUNC_serializer_set_ctx_params_fn rsa_priv_set_ctx_params;
  34 static OSSL_FUNC_serializer_settable_ctx_params_fn rsa_priv_settable_ctx_params;
  35 static OSSL_FUNC_serializer_serialize_data_fn rsa_priv_der_data;
  36 static OSSL_FUNC_serializer_serialize_object_fn rsa_priv_der;
  37 static OSSL_FUNC_serializer_serialize_data_fn rsa_pem_priv_data;
  38 static OSSL_FUNC_serializer_serialize_object_fn rsa_pem_priv;
  39
  40 static OSSL_FUNC_serializer_newctx_fn rsa_print_newctx;
  41 static OSSL_FUNC_serializer_freectx_fn rsa_print_freectx;
  42 static OSSL_FUNC_serializer_serialize_data_fn rsa_priv_print_data;
  43 static OSSL_FUNC_serializer_serialize_object_fn rsa_priv_print;
  44
  45  /*
  46  * Context used for private key serialization.
  47  */
  48 struct rsa_priv_ctx_st {
  49     void *provctx;
  50
  51     struct pkcs8_encrypt_ctx_st sc;
  52 };
  53
  54 /* Private key : context */
  55 static void *rsa_priv_newctx(void *provctx)
  56 {
  57     struct rsa_priv_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
  58
  59     if (ctx != NULL) {
  60         ctx->provctx = provctx;
  61         /* -1 is the "whatever" indicator, i.e. the PKCS8 library default PBE */
  62         ctx->sc.pbe_nid = -1;
  63     }
  64     return ctx;
  65 }
  66
  67 static void rsa_priv_freectx(void *vctx)
  68 {
  69     struct rsa_priv_ctx_st *ctx = vctx;
  70
  71     EVP_CIPHER_free(ctx->sc.cipher);
  72     OPENSSL_free(ctx->sc.cipher_pass);
  73     OPENSSL_free(ctx);
  74 }
  75
  76 static const OSSL_PARAM *rsa_priv_settable_ctx_params(void)
  77 {
  78     static const OSSL_PARAM settables[] = {
  79         OSSL_PARAM_utf8_string(OSSL_SERIALIZER_PARAM_CIPHER, NULL, 0),
  80         OSSL_PARAM_octet_string(OSSL_SERIALIZER_PARAM_PASS, NULL, 0),
  81         OSSL_PARAM_END,
  82     };
  83
  84     return settables;
  85 }
  86
  87 static int rsa_priv_set_ctx_params(void *vctx, const OSSL_PARAM params[])
  88 {
  89     struct rsa_priv_ctx_st *ctx = vctx;
  90     const OSSL_PARAM *p;
  91
  92     if ((p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_CIPHER))
  93         != NULL) {
  94         const OSSL_PARAM *propsp =
  95             OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PROPERTIES);
  96         const char *props = NULL;
  97
  98         if (p->data_type != OSSL_PARAM_UTF8_STRING)
  99             return 0;
 100         if (propsp != NULL && propsp->data_type != OSSL_PARAM_UTF8_STRING)
 101             return 0;
 102         props = (propsp != NULL ? propsp->data : NULL);
 103
 104         EVP_CIPHER_free(ctx->sc.cipher);
 105         ctx->sc.cipher_intent = p->data != NULL;
 106         if (p->data != NULL
 107             && ((ctx->sc.cipher = EVP_CIPHER_fetch(NULL, p->data, props))
 108                 == NULL))
 109             return 0;
 110     }
 111     if ((p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PASS))
 112         != NULL) {
 113         OPENSSL_free(ctx->sc.cipher_pass);
 114         ctx->sc.cipher_pass = NULL;
 115         if (!OSSL_PARAM_get_octet_string(p, &ctx->sc.cipher_pass, 0,
 116                                          &ctx->sc.cipher_pass_length))
 117             return 0;
 118     }
 119     return 1;
 120 }
 121
 122 /* Private key : DER */
 123 static int rsa_priv_der_data(void *vctx, const OSSL_PARAM params[],
 124                              OSSL_CORE_BIO *out,
 125                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 126 {
 127     struct rsa_priv_ctx_st *ctx = vctx;
 128     OSSL_FUNC_keymgmt_new_fn *rsa_new = ossl_prov_get_keymgmt_rsa_new();
 129     OSSL_FUNC_keymgmt_free_fn *rsa_free = ossl_prov_get_keymgmt_rsa_free();
 130     OSSL_FUNC_keymgmt_import_fn *rsa_import = ossl_prov_get_keymgmt_rsa_import();
 131     int ok = 0;
 132
 133     if (rsa_import != NULL) {
 134         RSA *rsa;
 135
 136         if ((rsa = rsa_new(ctx->provctx)) != NULL
 137             && rsa_import(rsa, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 138             && rsa_priv_der(ctx, rsa, out, cb, cbarg))
 139             ok = 1;
 140         rsa_free(rsa);
 141     }
 142     return ok;
 143 }
 144
 145 static int rsa_priv_der(void *vctx, void *rsa, OSSL_CORE_BIO *cout,
 146                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 147 {
 148     struct rsa_priv_ctx_st *ctx = vctx;
 149     int ret;
 150     BIO *out = bio_new_from_core_bio(ctx->provctx, cout);
 151
 152     if (out == NULL)
 153         return 0;
 154
 155     ctx->sc.cb = cb;
 156     ctx->sc.cbarg = cbarg;
 157
 158     ret = ossl_prov_write_priv_der_from_obj(out, rsa,
 159                                             ossl_prov_rsa_type_to_evp(rsa),
 160                                             ossl_prov_prepare_rsa_params,
 161                                             (i2d_of_void *)i2d_RSAPrivateKey,
 162                                             &ctx->sc);
 163     BIO_free(out);
 164
 165     return ret;
 166 }
 167
 168 /* Private key : PEM */
 169 static int rsa_pem_priv_data(void *vctx, const OSSL_PARAM params[],
 170                              OSSL_CORE_BIO *out,
 171                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 172 {
 173     struct rsa_priv_ctx_st *ctx = vctx;
 174     OSSL_FUNC_keymgmt_new_fn *rsa_new = ossl_prov_get_keymgmt_rsa_new();
 175     OSSL_FUNC_keymgmt_free_fn *rsa_free = ossl_prov_get_keymgmt_rsa_free();
 176     OSSL_FUNC_keymgmt_import_fn *rsa_import = ossl_prov_get_keymgmt_rsa_import();
 177     int ok = 0;
 178
 179     if (rsa_import != NULL) {
 180         RSA *rsa;
 181
 182         if ((rsa = rsa_new(ctx->provctx)) != NULL
 183             && rsa_import(rsa, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 184             && rsa_pem_priv(ctx, rsa, out, cb, cbarg))
 185             ok = 1;
 186         rsa_free(rsa);
 187     }
 188     return ok;
 189 }
 190
 191 static int rsa_pem_priv(void *vctx, void *rsa, OSSL_CORE_BIO *cout,
 192                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 193 {
 194     struct rsa_priv_ctx_st *ctx = vctx;
 195     int ret;
 196     BIO *out = bio_new_from_core_bio(ctx->provctx, cout);
 197
 198     if (out == NULL)
 199         return 0;
 200
 201     ctx->sc.cb = cb;
 202     ctx->sc.cbarg = cbarg;
 203
 204     ret = ossl_prov_write_priv_pem_from_obj(out, rsa,
 205                                             ossl_prov_rsa_type_to_evp(rsa),
 206                                             ossl_prov_prepare_rsa_params,
 207                                             (i2d_of_void *)i2d_RSAPrivateKey,
 208                                             &ctx->sc);
 209     BIO_free(out);
 210
 211     return ret;
 212 }
 213
 214 /*
 215  * There's no specific print context, so we use the provider context
 216  */
 217 static void *rsa_print_newctx(void *provctx)
 218 {
 219     return provctx;
 220 }
 221
 222 static void rsa_print_freectx(void *ctx)
 223 {
 224 }
 225
 226 static int rsa_priv_print_data(void *vctx, const OSSL_PARAM params[],
 227                                OSSL_CORE_BIO *out,
 228                                OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 229 {
 230     struct rsa_priv_ctx_st *ctx = vctx;
 231     OSSL_FUNC_keymgmt_new_fn *rsa_new = ossl_prov_get_keymgmt_rsa_new();
 232     OSSL_FUNC_keymgmt_free_fn *rsa_free = ossl_prov_get_keymgmt_rsa_free();
 233     OSSL_FUNC_keymgmt_import_fn *rsa_import = ossl_prov_get_keymgmt_rsa_import();
 234     int ok = 0;
 235
 236     if (rsa_import != NULL) {
 237         RSA *rsa;
 238
 239         if ((rsa = rsa_new(ctx->provctx)) != NULL
 240             && rsa_import(rsa, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 241             && rsa_priv_print(ctx, rsa, out, cb, cbarg))
 242             ok = 1;
 243         rsa_free(rsa);
 244     }
 245     return ok;
 246 }
 247
 248 static int rsa_priv_print(void *ctx, void *rsa, OSSL_CORE_BIO *cout,
 249                           OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 250 {
 251     BIO *out = bio_new_from_core_bio(ctx, cout);
 252     int ret;
 253
 254     if (out == NULL)
 255         return 0;
 256
 257     ret = ossl_prov_print_rsa(out, rsa, 1);
 258     BIO_free(out);
 259
 260     return ret;
 261 }
 262
 263 const OSSL_DISPATCH rsa_priv_der_serializer_functions[] = {
 264     { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))rsa_priv_newctx },
 265     { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))rsa_priv_freectx },
 266     { OSSL_FUNC_SERIALIZER_SET_CTX_PARAMS,
 267       (void (*)(void))rsa_priv_set_ctx_params },
 268     { OSSL_FUNC_SERIALIZER_SETTABLE_CTX_PARAMS,
 269       (void (*)(void))rsa_priv_settable_ctx_params },
 270     { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))rsa_priv_der_data },
 271     { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))rsa_priv_der },
 272     { 0, NULL }
 273 };
 274
 275 const OSSL_DISPATCH rsa_priv_pem_serializer_functions[] = {
 276     { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))rsa_priv_newctx },
 277     { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))rsa_priv_freectx },
 278     { OSSL_FUNC_SERIALIZER_SET_CTX_PARAMS,
 279       (void (*)(void))rsa_priv_set_ctx_params },
 280     { OSSL_FUNC_SERIALIZER_SETTABLE_CTX_PARAMS,
 281       (void (*)(void))rsa_priv_settable_ctx_params },
 282     { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))rsa_pem_priv_data },
 283     { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))rsa_pem_priv },
 284     { 0, NULL }
 285 };
 286
 287 const OSSL_DISPATCH rsa_priv_text_serializer_functions[] = {
 288     { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))rsa_print_newctx },
 289     { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))rsa_print_freectx },
 290     { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))rsa_priv_print },
 291     { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA,
 292       (void (*)(void))rsa_priv_print_data },
 293     { 0, NULL }
 294 };