providers/implementations/serializers/serializer_dsa.c

   1 /*
   2  * Copyright 2019 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/dsa.h>
  17 #include <openssl/err.h>
  18 #include "prov/bio.h"             /* ossl_prov_bio_printf() */
  19 #include "prov/implementations.h" /* rsa_keymgmt_functions */
  20 #include "prov/providercommonerr.h" /* PROV_R_BN_ERROR */
  21 #include "serializer_local.h"
  22
  23 OSSL_OP_keymgmt_new_fn *ossl_prov_get_keymgmt_dsa_new(void)
  24 {
  25     return ossl_prov_get_keymgmt_new(dsa_keymgmt_functions);
  26 }
  27
  28 OSSL_OP_keymgmt_free_fn *ossl_prov_get_keymgmt_dsa_free(void)
  29 {
  30     return ossl_prov_get_keymgmt_free(dsa_keymgmt_functions);
  31 }
  32
  33 OSSL_OP_keymgmt_import_fn *ossl_prov_get_keymgmt_dsa_import(void)
  34 {
  35     return ossl_prov_get_keymgmt_import(dsa_keymgmt_functions);
  36 }
  37
  38 int ossl_prov_print_dsa(BIO *out, DSA *dsa, enum dsa_print_type type)
  39 {
  40     const char *type_label = NULL;
  41     const BIGNUM *priv_key = NULL, *pub_key = NULL;
  42     const BIGNUM *p = NULL, *q = NULL, *g = NULL;
  43
  44
  45     switch (type) {
  46     case dsa_print_priv:
  47         type_label = "Private-Key";
  48         break;
  49     case dsa_print_pub:
  50         type_label = "Public-Key";
  51         break;
  52     case dsa_print_params:
  53         type_label = "DSA-Parameters";
  54         break;
  55     }
  56
  57     if (type == dsa_print_priv) {
  58         priv_key = DSA_get0_priv_key(dsa);
  59         if (priv_key == NULL)
  60             goto null_err;
  61     }
  62
  63     if (type == dsa_print_priv || type == dsa_print_pub) {
  64         pub_key = DSA_get0_pub_key(dsa);
  65         if (pub_key == NULL)
  66             goto null_err;
  67     }
  68
  69     p = DSA_get0_p(dsa);
  70     q = DSA_get0_q(dsa);
  71     g = DSA_get0_p(dsa);
  72
  73     if (p == NULL || q == NULL || g == NULL)
  74         goto null_err;
  75
  76     if (ossl_prov_bio_printf(out, "%s: (%d bit)\n", type_label, BN_num_bits(p))
  77         <= 0)
  78         goto err;
  79     if (priv_key != NULL
  80         && !ossl_prov_print_labeled_bignum(out, "priv:", priv_key))
  81         goto err;
  82     if (pub_key != NULL
  83         && !ossl_prov_print_labeled_bignum(out, "pub: ", pub_key))
  84         goto err;
  85     if (!ossl_prov_print_labeled_bignum(out, "P:   ", p))
  86         goto err;
  87     if (!ossl_prov_print_labeled_bignum(out, "Q:   ", q))
  88         goto err;
  89     if (!ossl_prov_print_labeled_bignum(out, "G:   ", g))
  90         goto err;
  91
  92     return 1;
  93  err:
  94     return 0;
  95  null_err:
  96     ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_NULL_PARAMETER);
  97     goto err;
  98 }
  99
 100 int ossl_prov_prepare_dsa_params(const void *dsa, int nid,
 101                                  void **pstr, int *pstrtype)
 102 {
 103     ASN1_STRING *params = ASN1_STRING_new();
 104
 105     if (params == NULL) {
 106         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 107         return 0;
 108     }
 109
 110     params->length = i2d_DSAparams(dsa, &params->data);
 111
 112     if (params->length <= 0) {
 113         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 114         ASN1_STRING_free(params);
 115         return 0;
 116     }
 117
 118     *pstrtype = V_ASN1_SEQUENCE;
 119     *pstr = params;
 120     return 1;
 121 }
 122
 123 int ossl_prov_prepare_all_dsa_params(const void *dsa, int nid,
 124                                      void **pstr, int *pstrtype)
 125 {
 126     const BIGNUM *p = DSA_get0_p(dsa);
 127     const BIGNUM *q = DSA_get0_q(dsa);
 128     const BIGNUM *g = DSA_get0_g(dsa);
 129
 130     if (p != NULL && q != NULL && g != NULL)
 131         return ossl_prov_prepare_dsa_params(dsa, nid, pstr, pstrtype);
 132
 133     *pstr = NULL;
 134     *pstrtype = V_ASN1_UNDEF;
 135     return 1;
 136 }
 137
 138 int ossl_prov_dsa_pub_to_der(const void *dsa, unsigned char **pder)
 139 {
 140     ASN1_INTEGER *pub_key = BN_to_ASN1_INTEGER(DSA_get0_pub_key(dsa), NULL);
 141     int ret;
 142
 143     if (pub_key == NULL) {
 144         ERR_raise(ERR_LIB_PROV, PROV_R_BN_ERROR);
 145         return 0;
 146     }
 147
 148     ret = i2d_ASN1_INTEGER(pub_key, pder);
 149
 150     ASN1_STRING_clear_free(pub_key);
 151     return ret;
 152 }
 153
 154 int ossl_prov_dsa_priv_to_der(const void *dsa, unsigned char **pder)
 155 {
 156     ASN1_INTEGER *priv_key = BN_to_ASN1_INTEGER(DSA_get0_priv_key(dsa), NULL);
 157     int ret;
 158
 159     if (priv_key == NULL) {
 160         ERR_raise(ERR_LIB_PROV, PROV_R_BN_ERROR);
 161         return 0;
 162     }
 163
 164     ret = i2d_ASN1_INTEGER(priv_key, pder);
 165
 166     ASN1_STRING_clear_free(priv_key);
 167     return ret;
 168 }