providers/implementations/encode_decode/encoder_ec_pub.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_dispatch.h>
  11 #include <openssl/err.h>
  12 #include <openssl/pem.h>
  13 #include <openssl/types.h>
  14 #include <openssl/params.h>
  15 #include "prov/bio.h"
  16 #include "prov/implementations.h"
  17 #include "prov/provider_ctx.h"
  18 #include "encoder_local.h"
  19
  20 #define EC_SELECT_PUBLIC_IMPORTABLE                                            \
  21     OSSL_KEYMGMT_SELECT_PUBLIC_KEY | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS
  22
  23 static OSSL_FUNC_encoder_newctx_fn ec_pub_newctx;
  24 static OSSL_FUNC_encoder_freectx_fn ec_pub_freectx;
  25 static OSSL_FUNC_encoder_encode_data_fn ec_pub_der_data;
  26 static OSSL_FUNC_encoder_encode_object_fn ec_pub_der;
  27 static OSSL_FUNC_encoder_encode_data_fn ec_pub_pem_data;
  28 static OSSL_FUNC_encoder_encode_object_fn ec_pub_pem;
  29 static OSSL_FUNC_encoder_encode_data_fn ec_pub_print_data;
  30 static OSSL_FUNC_encoder_encode_object_fn ec_pub_print;
  31
  32 /* Public key : context */
  33
  34 /*
  35  * There's no specific implementation context, so we use the provider context
  36  */
  37 static void *ec_pub_newctx(void *provctx)
  38 {
  39     return provctx;
  40 }
  41
  42 static void ec_pub_freectx(void *ctx)
  43 {
  44 }
  45
  46 /* Public key : DER */
  47 static int ec_pub_der_data(void *vctx, const OSSL_PARAM params[],
  48                            OSSL_CORE_BIO *out,
  49                            OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  50 {
  51     OSSL_FUNC_keymgmt_new_fn *ec_new;
  52     OSSL_FUNC_keymgmt_free_fn *ec_free;
  53     OSSL_FUNC_keymgmt_import_fn *ec_import;
  54     int ok = 0;
  55
  56     ec_get_new_free_import(&ec_new, &ec_free, &ec_import);
  57
  58     if (ec_import != NULL) {
  59         EC_KEY *eckey;
  60
  61         /* vctx == provctx */
  62         if ((eckey = ec_new(vctx)) != NULL
  63             && ec_import(eckey, EC_SELECT_PUBLIC_IMPORTABLE, params)
  64             && ec_pub_der(vctx, eckey, out, cb, cbarg))
  65             ok = 1;
  66         ec_free(eckey);
  67     }
  68     return ok;
  69 }
  70
  71 static int ec_pub_der(void *ctx, void *eckey, OSSL_CORE_BIO *cout,
  72                       OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  73 {
  74     BIO *out = bio_new_from_core_bio(ctx, cout);
  75     int ret;
  76
  77     if (out == NULL)
  78         return 0;
  79
  80     ret = ossl_prov_write_pub_der_from_obj(out, eckey, EVP_PKEY_EC,
  81                                            ossl_prov_prepare_ec_params,
  82                                            ossl_prov_ec_pub_to_der);
  83     BIO_free(out);
  84
  85     return ret;
  86 }
  87
  88 /* Public key : PEM */
  89 static int ec_pub_pem_data(void *vctx, const OSSL_PARAM params[],
  90                            OSSL_CORE_BIO *out,
  91                            OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  92 {
  93     OSSL_FUNC_keymgmt_new_fn *ec_new;
  94     OSSL_FUNC_keymgmt_free_fn *ec_free;
  95     OSSL_FUNC_keymgmt_import_fn *ec_import;
  96     int ok = 0;
  97
  98     ec_get_new_free_import(&ec_new, &ec_free, &ec_import);
  99
 100     if (ec_import != NULL) {
 101         EC_KEY *eckey;
 102
 103         /* ctx == provctx */
 104         if ((eckey = ec_new(vctx)) != NULL
 105             && ec_import(eckey, EC_SELECT_PUBLIC_IMPORTABLE, params)
 106             && ec_pub_pem(vctx, eckey, out, cb, cbarg))
 107             ok = 1;
 108         ec_free(eckey);
 109     }
 110     return ok;
 111 }
 112
 113 static int ec_pub_pem(void *vctx, void *eckey, OSSL_CORE_BIO *cout,
 114                       OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 115 {
 116     BIO *out = bio_new_from_core_bio(vctx, cout);
 117     int ret;
 118
 119     if (out == NULL)
 120         return 0;
 121
 122     ret = ossl_prov_write_pub_pem_from_obj(out, eckey, EVP_PKEY_EC,
 123                                            ossl_prov_prepare_ec_params,
 124                                            ossl_prov_ec_pub_to_der);
 125     BIO_free(out);
 126
 127     return ret;
 128 }
 129
 130 static int ec_pub_print_data(void *vctx, const OSSL_PARAM params[],
 131                              OSSL_CORE_BIO *out,
 132                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 133 {
 134     OSSL_FUNC_keymgmt_new_fn *ec_new;
 135     OSSL_FUNC_keymgmt_free_fn *ec_free;
 136     OSSL_FUNC_keymgmt_import_fn *ec_import;
 137     int ok = 0;
 138
 139     ec_get_new_free_import(&ec_new, &ec_free, &ec_import);
 140
 141     if (ec_import != NULL) {
 142         EC_KEY *eckey;
 143
 144         /* ctx == provctx */
 145         if ((eckey = ec_new(vctx)) != NULL
 146             && ec_import(eckey, EC_SELECT_PUBLIC_IMPORTABLE, params)
 147             && ec_pub_print(vctx, eckey, out, cb, cbarg))
 148             ok = 1;
 149         ec_free(eckey);
 150     }
 151     return ok;
 152 }
 153
 154 static int ec_pub_print(void *vctx, void *eckey, OSSL_CORE_BIO *cout,
 155                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
 156 {
 157     BIO *out = bio_new_from_core_bio(vctx, cout);
 158     int ret;
 159
 160     if (out == NULL)
 161         return 0;
 162
 163     ret = ossl_prov_print_eckey(out, eckey, ec_print_pub);
 164     BIO_free(out);
 165
 166     return ret;
 167 }
 168
 169 const OSSL_DISPATCH ec_pub_der_encoder_functions[] = {
 170     { OSSL_FUNC_ENCODER_NEWCTX, (void (*)(void))ec_pub_newctx },
 171     { OSSL_FUNC_ENCODER_FREECTX, (void (*)(void))ec_pub_freectx },
 172     { OSSL_FUNC_ENCODER_ENCODE_DATA, (void (*)(void))ec_pub_der_data },
 173     { OSSL_FUNC_ENCODER_ENCODE_OBJECT, (void (*)(void))ec_pub_der },
 174     { 0, NULL }
 175 };
 176
 177 const OSSL_DISPATCH ec_pub_pem_encoder_functions[] = {
 178     { OSSL_FUNC_ENCODER_NEWCTX, (void (*)(void))ec_pub_newctx },
 179     { OSSL_FUNC_ENCODER_FREECTX, (void (*)(void))ec_pub_freectx },
 180     { OSSL_FUNC_ENCODER_ENCODE_DATA, (void (*)(void))ec_pub_pem_data },
 181     { OSSL_FUNC_ENCODER_ENCODE_OBJECT, (void (*)(void))ec_pub_pem },
 182     { 0, NULL }
 183 };
 184
 185 const OSSL_DISPATCH ec_pub_text_encoder_functions[] = {
 186     { OSSL_FUNC_ENCODER_NEWCTX, (void (*)(void))ec_pub_newctx },
 187     { OSSL_FUNC_ENCODER_FREECTX, (void (*)(void))ec_pub_freectx },
 188     { OSSL_FUNC_ENCODER_ENCODE_OBJECT, (void (*)(void))ec_pub_print },
 189     { OSSL_FUNC_ENCODER_ENCODE_DATA,
 190       (void (*)(void))ec_pub_print_data },
 191     { 0, NULL }
 192 };