providers/implementations/serializers/serializer_ecx_priv.c

   1 /*
   2  * Copyright 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 #include <openssl/core_numbers.h>
  11 #include <openssl/core_names.h>
  12 #include <openssl/err.h>
  13 #include <openssl/pem.h>
  14 #include <openssl/types.h>
  15 #include <openssl/params.h>
  16 #include "crypto/ecx.h"
  17 #include "prov/bio.h"
  18 #include "prov/implementations.h"
  19 #include "serializer_local.h"
  20
  21 static OSSL_OP_serializer_newctx_fn x25519_priv_newctx;
  22 static OSSL_OP_serializer_newctx_fn x448_priv_newctx;
  23 static OSSL_OP_serializer_newctx_fn ed25519_priv_newctx;
  24 static OSSL_OP_serializer_newctx_fn ed448_priv_newctx;
  25 static OSSL_OP_serializer_freectx_fn ecx_priv_freectx;
  26 static OSSL_OP_serializer_set_ctx_params_fn ecx_priv_set_ctx_params;
  27 static OSSL_OP_serializer_settable_ctx_params_fn ecx_priv_settable_ctx_params;
  28 static OSSL_OP_serializer_serialize_data_fn ecx_priv_der_data;
  29 static OSSL_OP_serializer_serialize_object_fn ecx_priv_der;
  30 static OSSL_OP_serializer_serialize_data_fn ecx_priv_pem_data;
  31 static OSSL_OP_serializer_serialize_object_fn ecx_priv_pem;
  32
  33 static OSSL_OP_serializer_serialize_data_fn ecx_priv_print_data;
  34 static OSSL_OP_serializer_serialize_object_fn ecx_priv_print;
  35
  36  /*
  37  * Context used for private key serialization.
  38  */
  39 struct ecx_priv_ctx_st {
  40     void *provctx;
  41
  42     struct pkcs8_encrypt_ctx_st sc;
  43     ECX_KEY_TYPE type;
  44 };
  45
  46 /* Private key : context */
  47 static void *ecx_priv_newctx(void *provctx, ECX_KEY_TYPE type)
  48 {
  49     struct ecx_priv_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
  50
  51     if (ctx != NULL) {
  52         ctx->provctx = provctx;
  53
  54         /* -1 is the "whatever" indicator, i.e. the PKCS8 library default PBE */
  55         ctx->sc.pbe_nid = -1;
  56         ctx->type = type;
  57     }
  58     return ctx;
  59 }
  60
  61 static void *x25519_priv_newctx(void *provctx)
  62 {
  63     return ecx_priv_newctx(provctx, ECX_KEY_TYPE_X25519);
  64 }
  65
  66 static void *x448_priv_newctx(void *provctx)
  67 {
  68     return ecx_priv_newctx(provctx, ECX_KEY_TYPE_X448);
  69 }
  70
  71 static void *ed25519_priv_newctx(void *provctx)
  72 {
  73     return ecx_priv_newctx(provctx, ECX_KEY_TYPE_ED25519);
  74 }
  75
  76 static void *ed448_priv_newctx(void *provctx)
  77 {
  78     return ecx_priv_newctx(provctx, ECX_KEY_TYPE_ED448);
  79 }
  80
  81 static void ecx_priv_freectx(void *vctx)
  82 {
  83     struct ecx_priv_ctx_st *ctx = vctx;
  84
  85     EVP_CIPHER_free(ctx->sc.cipher);
  86     OPENSSL_free(ctx->sc.cipher_pass);
  87     OPENSSL_free(ctx);
  88 }
  89
  90 static const OSSL_PARAM *ecx_priv_settable_ctx_params(void)
  91 {
  92     static const OSSL_PARAM settables[] = {
  93         OSSL_PARAM_utf8_string(OSSL_SERIALIZER_PARAM_CIPHER, NULL, 0),
  94         OSSL_PARAM_octet_string(OSSL_SERIALIZER_PARAM_PASS, NULL, 0),
  95         OSSL_PARAM_END,
  96     };
  97
  98     return settables;
  99 }
 100
 101 static int ecx_priv_set_ctx_params(void *vctx, const OSSL_PARAM params[])
 102 {
 103     struct ecx_priv_ctx_st *ctx = vctx;
 104     const OSSL_PARAM *p;
 105
 106     p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_CIPHER);
 107     if (p != NULL) {
 108         const OSSL_PARAM *propsp =
 109             OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PROPERTIES);
 110         const char *props;
 111
 112         if (p->data_type != OSSL_PARAM_UTF8_STRING)
 113             return 0;
 114         if (propsp != NULL && propsp->data_type != OSSL_PARAM_UTF8_STRING)
 115             return 0;
 116         props = (propsp != NULL ? propsp->data : NULL);
 117
 118         EVP_CIPHER_free(ctx->sc.cipher);
 119         ctx->sc.cipher_intent = p->data != NULL;
 120         if (p->data != NULL
 121             && ((ctx->sc.cipher = EVP_CIPHER_fetch(NULL, p->data, props))
 122                 == NULL))
 123             return 0;
 124     }
 125     p = OSSL_PARAM_locate_const(params, OSSL_SERIALIZER_PARAM_PASS);
 126     if (p != NULL) {
 127         OPENSSL_free(ctx->sc.cipher_pass);
 128         ctx->sc.cipher_pass = NULL;
 129         if (!OSSL_PARAM_get_octet_string(p, &ctx->sc.cipher_pass, 0,
 130                                          &ctx->sc.cipher_pass_length))
 131             return 0;
 132     }
 133     return 1;
 134 }
 135
 136 /* Private key : DER */
 137 static int ecx_priv_der_data(void *vctx, const OSSL_PARAM params[], BIO *out,
 138                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 139 {
 140     struct ecx_priv_ctx_st *ctx = vctx;
 141     OSSL_OP_keymgmt_new_fn *ecx_new;
 142     OSSL_OP_keymgmt_free_fn *ecx_free;
 143     OSSL_OP_keymgmt_import_fn *ecx_import;
 144     int ok = 0;
 145
 146     ecx_get_new_free_import(ctx->type, &ecx_new, &ecx_free, &ecx_import);
 147
 148     if (ecx_import != NULL) {
 149         ECX_KEY *ecxkey;
 150
 151         if ((ecxkey = ecx_new(ctx->provctx)) != NULL
 152             && ecx_import(ecxkey, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 153             && ecx_priv_der(ctx, ecxkey, out, cb, cbarg))
 154             ok = 1;
 155         ecx_free(ecxkey);
 156     }
 157     return ok;
 158 }
 159
 160 static int ecx_priv_der(void *vctx, void *vecxkey, BIO *out,
 161                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 162 {
 163     struct ecx_priv_ctx_st *ctx = vctx;
 164     ECX_KEY *ecxkey = vecxkey;
 165     int ret;
 166     int nid = KEYTYPE2NID(ctx->type);
 167
 168     ctx->sc.cb = cb;
 169     ctx->sc.cbarg = cbarg;
 170
 171     ret = ossl_prov_write_priv_der_from_obj(out, ecxkey,
 172                                             nid,
 173                                             NULL,
 174                                             ossl_prov_ecx_priv_to_der,
 175                                             &ctx->sc);
 176
 177     return ret;
 178 }
 179
 180 /* Private key : PEM */
 181 static int ecx_priv_pem_data(void *vctx, const OSSL_PARAM params[], BIO *out,
 182                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 183 {
 184     struct ecx_priv_ctx_st *ctx = vctx;
 185     OSSL_OP_keymgmt_new_fn *ecx_new;
 186     OSSL_OP_keymgmt_free_fn *ecx_free;
 187     OSSL_OP_keymgmt_import_fn *ecx_import;
 188     int ok = 0;
 189
 190     ecx_get_new_free_import(ctx->type, &ecx_new, &ecx_free, &ecx_import);
 191
 192     if (ecx_import != NULL) {
 193         ECX_KEY *ecxkey;
 194
 195         if ((ecxkey = ecx_new(ctx->provctx)) != NULL
 196             && ecx_import(ecxkey, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 197             && ecx_priv_pem(ctx->provctx, ecxkey, out, cb, cbarg))
 198             ok = 1;
 199         ecx_free(ecxkey);
 200     }
 201     return ok;
 202 }
 203
 204 static int ecx_priv_pem(void *vctx, void *ecxkey, BIO *out,
 205                        OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 206 {
 207     struct ecx_priv_ctx_st *ctx = vctx;
 208     int ret;
 209     int nid = KEYTYPE2NID(ctx->type);
 210
 211     ctx->sc.cb = cb;
 212     ctx->sc.cbarg = cbarg;
 213
 214     ret = ossl_prov_write_priv_pem_from_obj(out, ecxkey,
 215                                             nid,
 216                                             NULL,
 217                                             ossl_prov_ecx_priv_to_der,
 218                                             &ctx->sc);
 219
 220     return ret;
 221 }
 222
 223 static int ecx_priv_print_data(void *vctx, const OSSL_PARAM params[], BIO *out,
 224                                OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 225 {
 226     struct ecx_priv_ctx_st *ctx = vctx;
 227     OSSL_OP_keymgmt_new_fn *ecx_new;
 228     OSSL_OP_keymgmt_free_fn *ecx_free;
 229     OSSL_OP_keymgmt_import_fn *ecx_import;
 230     int ok = 0;
 231
 232     ecx_get_new_free_import(ctx->type, &ecx_new, &ecx_free, &ecx_import);
 233
 234     if (ecx_import != NULL) {
 235         ECX_KEY *ecxkey;
 236
 237         if ((ecxkey = ecx_new(ctx->provctx)) != NULL
 238             && ecx_import(ecxkey, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
 239             && ecx_priv_print(ctx, ecxkey, out, cb, cbarg))
 240             ok = 1;
 241         ecx_free(ecxkey);
 242     }
 243     return ok;
 244 }
 245
 246 static int ecx_priv_print(void *ctx, void *ecxkey, BIO *out,
 247                          OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 248 {
 249     return ossl_prov_print_ecx(out, ecxkey, ecx_print_priv);
 250 }
 251
 252 #define MAKE_SERIALIZER_FUNCTIONS(alg, type) \
 253     const OSSL_DISPATCH alg##_priv_##type##_serializer_functions[] = { \
 254         { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))alg##_priv_newctx }, \
 255         { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))ecx_priv_freectx }, \
 256         { OSSL_FUNC_SERIALIZER_SET_CTX_PARAMS, \
 257           (void (*)(void))ecx_priv_set_ctx_params }, \
 258         { OSSL_FUNC_SERIALIZER_SETTABLE_CTX_PARAMS, \
 259           (void (*)(void))ecx_priv_settable_ctx_params }, \
 260         { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, \
 261           (void (*)(void))ecx_priv_##type##_data }, \
 262         { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, \
 263           (void (*)(void))ecx_priv_##type }, \
 264         { 0, NULL } \
 265     };
 266
 267 #define MAKE_SERIALIZER_FUNCTIONS_GROUP(alg) \
 268     MAKE_SERIALIZER_FUNCTIONS(alg, der) \
 269     MAKE_SERIALIZER_FUNCTIONS(alg, pem) \
 270     const OSSL_DISPATCH alg##_priv_print_serializer_functions[] = { \
 271         { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))alg##_priv_newctx }, \
 272         { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))ecx_priv_freectx }, \
 273         { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, \
 274           (void (*)(void))ecx_priv_print }, \
 275         { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, \
 276           (void (*)(void))ecx_priv_print_data }, \
 277         { 0, NULL } \
 278     };
 279
 280 MAKE_SERIALIZER_FUNCTIONS_GROUP(x25519)
 281 MAKE_SERIALIZER_FUNCTIONS_GROUP(x448)
 282 MAKE_SERIALIZER_FUNCTIONS_GROUP(ed25519)
 283 MAKE_SERIALIZER_FUNCTIONS_GROUP(ed448)