providers/implementations/serializers/serializer_dsa_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  * DSA 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/dsa.h>
  21 #include <openssl/types.h>
  22 #include <openssl/params.h>
  23 #include "prov/bio.h"
  24 #include "prov/implementations.h"
  25 #include "prov/provider_ctx.h"
  26 #include "serializer_local.h"
  27
  28 static OSSL_FUNC_serializer_newctx_fn dsa_priv_newctx;
  29 static OSSL_FUNC_serializer_freectx_fn dsa_priv_freectx;
  30 static OSSL_FUNC_serializer_set_ctx_params_fn dsa_priv_set_ctx_params;
  31 static OSSL_FUNC_serializer_settable_ctx_params_fn dsa_priv_settable_ctx_params;
  32 static OSSL_FUNC_serializer_serialize_data_fn dsa_priv_der_data;
  33 static OSSL_FUNC_serializer_serialize_object_fn dsa_priv_der;
  34 static OSSL_FUNC_serializer_serialize_data_fn dsa_pem_priv_data;
  35 static OSSL_FUNC_serializer_serialize_object_fn dsa_pem_priv;
  36
  37 static OSSL_FUNC_serializer_newctx_fn dsa_print_newctx;
  38 static OSSL_FUNC_serializer_freectx_fn dsa_print_freectx;
  39 static OSSL_FUNC_serializer_serialize_data_fn dsa_priv_print_data;
  40 static OSSL_FUNC_serializer_serialize_object_fn dsa_priv_print;
  41
  42  /*
  43  * Context used for private key serialization.
  44  */
  45 struct dsa_priv_ctx_st {
  46     void *provctx;
  47
  48     struct pkcs8_encrypt_ctx_st sc;
  49 };
  50
  51 /* Private key : context */
  52 static void *dsa_priv_newctx(void *provctx)
  53 {
  54     struct dsa_priv_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
  55
  56     if (ctx != NULL) {
  57         ctx->provctx = provctx;
  58
  59         /* -1 is the "whatever" indicator, i.e. the PKCS8 library default PBE */
  60         ctx->sc.pbe_nid = -1;
  61     }
  62     return ctx;
  63 }
  64
  65 static void dsa_priv_freectx(void *vctx)
  66 {
  67     struct dsa_priv_ctx_st *ctx = vctx;
  68
  69     EVP_CIPHER_free(ctx->sc.cipher);
  70     OPENSSL_free(ctx->sc.cipher_pass);
  71     OPENSSL_free(ctx);
  72 }
  73
  74 static const OSSL_PARAM *dsa_priv_settable_ctx_params(void)
  75 {
  76     static const OSSL_PARAM settables[] = {
  77         OSSL_PARAM_utf8_string(OSSL_SERIALIZER_PARAM_CIPHER, NULL, 0),
  78         OSSL_PARAM_octet_string(OSSL_SERIALIZER_PARAM_PASS, NULL, 0),
  79         OSSL_PARAM_END,
  80     };
  81
  82     return settables;
  83 }
  84
  85 static int dsa_priv_set_ctx_params(void *vctx, const OSSL_PARAM params[])
  86 {
  87     struct dsa_priv_ctx_st *ctx = vctx;
  88     const OSSL_PARAM *p;
  89
  90     if ((p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_CIPHER))
  91         != NULL) {
  92         const OSSL_PARAM *propsp =
  93             OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PROPERTIES);
  94         const char *props = NULL;
  95
  96         if (p->data_type != OSSL_PARAM_UTF8_STRING)
  97             return 0;
  98         if (propsp != NULL && propsp->data_type != OSSL_PARAM_UTF8_STRING)
  99             return 0;
 100         props = (propsp != NULL ? propsp->data : NULL);
 101
 102         EVP_CIPHER_free(ctx->sc.cipher);
 103         ctx->sc.cipher_intent = p->data != NULL;
 104         if (p->data != NULL
 105             && ((ctx->sc.cipher = EVP_CIPHER_fetch(NULL, p->data, props))
 106                 == NULL))
 107             return 0;
 108     }
 109     if ((p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PASS))
 110         != NULL) {
 111         OPENSSL_free(ctx->sc.cipher_pass);
 112         ctx->sc.cipher_pass = NULL;
 113         if (!OSSL_PARAM_get_octet_string(p, &ctx->sc.cipher_pass, 0,
 114                                          &ctx->sc.cipher_pass_length))
 115             return 0;
 116     }
 117     return 1;
 118 }
 119
 120 /* Private key : DER */
 121 static int dsa_priv_der_data(void *vctx, const OSSL_PARAM params[],
 122                              OSSL_CORE_BIO *out,
 123                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 124 {
 125     struct dsa_priv_ctx_st *ctx = vctx;
 126     OSSL_FUNC_keymgmt_new_fn *dsa_new = ossl_prov_get_keymgmt_dsa_new();
 127     OSSL_FUNC_keymgmt_free_fn *dsa_free = ossl_prov_get_keymgmt_dsa_free();
 128     OSSL_FUNC_keymgmt_import_fn *dsa_import = ossl_prov_get_keymgmt_dsa_import();
 129     int ok = 0;
 130
 131     if (dsa_import != NULL) {
 132         DSA *dsa;
 133
 134         if ((dsa = dsa_new(ctx->provctx)) != NULL
 135             && dsa_import(dsa, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 136             && dsa_priv_der(ctx, dsa, out, cb, cbarg))
 137             ok = 1;
 138         dsa_free(dsa);
 139     }
 140     return ok;
 141 }
 142
 143 static int dsa_priv_der(void *vctx, void *dsa, OSSL_CORE_BIO *cout,
 144                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 145 {
 146     struct dsa_priv_ctx_st *ctx = vctx;
 147     BIO *out = bio_new_from_core_bio(ctx->provctx, cout);
 148     int ret;
 149
 150     if (out == NULL)
 151         return 0;
 152
 153     ctx->sc.cb = cb;
 154     ctx->sc.cbarg = cbarg;
 155
 156     ret = ossl_prov_write_priv_der_from_obj(out, dsa, EVP_PKEY_DSA,
 157                                             ossl_prov_prepare_dsa_params,
 158                                             ossl_prov_dsa_priv_to_der,
 159                                             &ctx->sc);
 160     BIO_free(out);
 161
 162     return ret;
 163 }
 164
 165 /* Private key : PEM */
 166 static int dsa_pem_priv_data(void *vctx, const OSSL_PARAM params[],
 167                              OSSL_CORE_BIO *out,
 168                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 169 {
 170     struct dsa_priv_ctx_st *ctx = vctx;
 171     OSSL_FUNC_keymgmt_new_fn *dsa_new = ossl_prov_get_keymgmt_dsa_new();
 172     OSSL_FUNC_keymgmt_free_fn *dsa_free = ossl_prov_get_keymgmt_dsa_free();
 173     OSSL_FUNC_keymgmt_import_fn *dsa_import = ossl_prov_get_keymgmt_dsa_import();
 174     int ok = 0;
 175
 176     if (dsa_import != NULL) {
 177         DSA *dsa;
 178
 179         if ((dsa = dsa_new(ctx->provctx)) != NULL
 180             && dsa_import(dsa, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 181             && dsa_pem_priv(ctx, dsa, out, cb, cbarg))
 182             ok = 1;
 183         dsa_free(dsa);
 184     }
 185     return ok;
 186 }
 187
 188 static int dsa_pem_priv(void *vctx, void *dsa, OSSL_CORE_BIO *cout,
 189                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 190 {
 191     struct dsa_priv_ctx_st *ctx = vctx;
 192     BIO *out = bio_new_from_core_bio(ctx->provctx, cout);
 193     int ret;
 194
 195     if (out == NULL)
 196         return 0;
 197
 198     ctx->sc.cb = cb;
 199     ctx->sc.cbarg = cbarg;
 200
 201     ret = ossl_prov_write_priv_pem_from_obj(out, dsa, EVP_PKEY_DSA,
 202                                             ossl_prov_prepare_dsa_params,
 203                                             ossl_prov_dsa_priv_to_der,
 204                                             &ctx->sc);
 205     BIO_free(out);
 206
 207     return ret;
 208 }
 209
 210 /*
 211  * There's no specific print context, so we use the provider context
 212  */
 213 static void *dsa_print_newctx(void *provctx)
 214 {
 215     return provctx;
 216 }
 217
 218 static void dsa_print_freectx(void *ctx)
 219 {
 220 }
 221
 222 static int dsa_priv_print_data(void *vctx, const OSSL_PARAM params[],
 223                                OSSL_CORE_BIO *out,
 224                                OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 225 {
 226     struct dsa_priv_ctx_st *ctx = vctx;
 227     OSSL_FUNC_keymgmt_new_fn *dsa_new = ossl_prov_get_keymgmt_dsa_new();
 228     OSSL_FUNC_keymgmt_free_fn *dsa_free = ossl_prov_get_keymgmt_dsa_free();
 229     OSSL_FUNC_keymgmt_import_fn *dsa_import = ossl_prov_get_keymgmt_dsa_import();
 230     int ok = 0;
 231
 232     if (dsa_import != NULL) {
 233         DSA *dsa;
 234
 235         if ((dsa = dsa_new(ctx->provctx)) != NULL
 236             && dsa_import(dsa, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 237             && dsa_priv_print(ctx, dsa, out, cb, cbarg))
 238             ok = 1;
 239         dsa_free(dsa);
 240     }
 241     return ok;
 242 }
 243
 244 static int dsa_priv_print(void *ctx, void *dsa, OSSL_CORE_BIO *cout,
 245                           OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 246 {
 247     BIO *out = bio_new_from_core_bio(ctx, cout);
 248     int ret;
 249
 250     if (out == NULL)
 251         return 0;
 252
 253     ret = ossl_prov_print_dsa(out, dsa, dsa_print_priv);
 254     BIO_free(out);
 255
 256     return ret;
 257 }
 258
 259 const OSSL_DISPATCH dsa_priv_der_serializer_functions[] = {
 260     { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_priv_newctx },
 261     { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_priv_freectx },
 262     { OSSL_FUNC_SERIALIZER_SET_CTX_PARAMS,
 263       (void (*)(void))dsa_priv_set_ctx_params },
 264     { OSSL_FUNC_SERIALIZER_SETTABLE_CTX_PARAMS,
 265       (void (*)(void))dsa_priv_settable_ctx_params },
 266     { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dsa_priv_der_data },
 267     { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_priv_der },
 268     { 0, NULL }
 269 };
 270
 271 const OSSL_DISPATCH dsa_priv_pem_serializer_functions[] = {
 272     { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_priv_newctx },
 273     { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_priv_freectx },
 274     { OSSL_FUNC_SERIALIZER_SET_CTX_PARAMS,
 275       (void (*)(void))dsa_priv_set_ctx_params },
 276     { OSSL_FUNC_SERIALIZER_SETTABLE_CTX_PARAMS,
 277       (void (*)(void))dsa_priv_settable_ctx_params },
 278     { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dsa_pem_priv_data },
 279     { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_pem_priv },
 280     { 0, NULL }
 281 };
 282
 283 const OSSL_DISPATCH dsa_priv_text_serializer_functions[] = {
 284     { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dsa_print_newctx },
 285     { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dsa_print_freectx },
 286     { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dsa_priv_print },
 287     { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA,
 288       (void (*)(void))dsa_priv_print_data },
 289     { 0, NULL }
 290 };