crypto/pem/pem_pkey.c

   1 /*
   2  * Copyright 1995-2018 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 <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/buffer.h>
  13 #include <openssl/objects.h>
  14 #include <openssl/evp.h>
  15 #include <openssl/x509.h>
  16 #include <openssl/pkcs12.h>
  17 #include <openssl/pem.h>
  18 #include <openssl/engine.h>
  19 #include <openssl/dh.h>
  20 #include <openssl/store.h>
  21 #include <openssl/ui.h>
  22 #include <openssl/serializer.h>
  23 #include "crypto/store.h"
  24 #include "crypto/asn1.h"
  25 #include "crypto/evp.h"
  26 #include "pem_local.h"
  27
  28 int pem_check_suffix(const char *pem_str, const char *suffix);
  29
  30 EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
  31                                   void *u)
  32 {
  33     EVP_PKEY *ret = NULL;
  34     OSSL_STORE_CTX *ctx = NULL;
  35     OSSL_STORE_INFO *info = NULL;
  36     UI_METHOD *ui_method = NULL;
  37
  38     if ((ui_method = UI_UTIL_wrap_read_pem_callback(cb, 0)) == NULL)
  39         return NULL;
  40
  41     if ((ctx = ossl_store_attach_pem_bio(bp, ui_method, u)) == NULL)
  42         goto err;
  43 #ifndef OPENSSL_NO_SECURE_HEAP
  44     {
  45         int on = 1;
  46         if (!OSSL_STORE_ctrl(ctx, OSSL_STORE_C_USE_SECMEM, &on))
  47             goto err;
  48     }
  49 #endif
  50
  51     while (!OSSL_STORE_eof(ctx) && (info = OSSL_STORE_load(ctx)) != NULL) {
  52         if (OSSL_STORE_INFO_get_type(info) == OSSL_STORE_INFO_PKEY) {
  53             ret = OSSL_STORE_INFO_get1_PKEY(info);
  54             break;
  55         }
  56         OSSL_STORE_INFO_free(info);
  57     }
  58
  59     if (ret != NULL && x != NULL)
  60         *x = ret;
  61
  62  err:
  63     ossl_store_detach_pem_bio(ctx);
  64     UI_destroy_method(ui_method);
  65     OSSL_STORE_INFO_free(info);
  66     return ret;
  67 }
  68
  69 PEM_write_cb_fnsig(PrivateKey, EVP_PKEY, BIO, write_bio)
  70 {
  71     IMPLEMENT_PEM_provided_write_body_vars(EVP_PKEY, PrivateKey);
  72
  73     IMPLEMENT_PEM_provided_write_body_pass();
  74     IMPLEMENT_PEM_provided_write_body_main(EVP_PKEY, bio);
  75
  76  legacy:
  77     if (x->ameth == NULL || x->ameth->priv_encode != NULL)
  78         return PEM_write_bio_PKCS8PrivateKey(out, x, enc,
  79                                              (const char *)kstr, klen, cb, u);
  80     return PEM_write_bio_PrivateKey_traditional(out, x, enc, kstr, klen, cb, u);
  81 }
  82
  83 int PEM_write_bio_PrivateKey_traditional(BIO *bp, const EVP_PKEY *x,
  84                                          const EVP_CIPHER *enc,
  85                                          const unsigned char *kstr, int klen,
  86                                          pem_password_cb *cb, void *u)
  87 {
  88     char pem_str[80];
  89     BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
  90     return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
  91                               pem_str, bp, x, enc, kstr, klen, cb, u);
  92 }
  93
  94 EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
  95 {
  96     EVP_PKEY *ret = NULL;
  97     OSSL_STORE_CTX *ctx = NULL;
  98     OSSL_STORE_INFO *info = NULL;
  99
 100     if ((ctx = ossl_store_attach_pem_bio(bp, UI_null(), NULL)) == NULL)
 101         goto err;
 102
 103     while (!OSSL_STORE_eof(ctx) && (info = OSSL_STORE_load(ctx)) != NULL) {
 104         if (OSSL_STORE_INFO_get_type(info) == OSSL_STORE_INFO_PARAMS) {
 105             ret = OSSL_STORE_INFO_get1_PARAMS(info);
 106             break;
 107         }
 108         OSSL_STORE_INFO_free(info);
 109     }
 110
 111     if (ret != NULL && x != NULL)
 112         *x = ret;
 113
 114  err:
 115     ossl_store_detach_pem_bio(ctx);
 116     OSSL_STORE_INFO_free(info);
 117     return ret;
 118 }
 119
 120 PEM_write_fnsig(Parameters, EVP_PKEY, BIO, write_bio)
 121 {
 122     char pem_str[80];
 123     IMPLEMENT_PEM_provided_write_body_vars(EVP_PKEY, Parameters);
 124
 125     IMPLEMENT_PEM_provided_write_body_main(EVP_PKEY, bio);
 126
 127  legacy:
 128     if (!x->ameth || !x->ameth->param_encode)
 129         return 0;
 130
 131     BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
 132     return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
 133                               pem_str, out, x, NULL, NULL, 0, 0, NULL);
 134 }
 135
 136 #ifndef OPENSSL_NO_STDIO
 137 EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
 138                               void *u)
 139 {
 140     BIO *b;
 141     EVP_PKEY *ret;
 142
 143     if ((b = BIO_new(BIO_s_file())) == NULL) {
 144         PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
 145         return 0;
 146     }
 147     BIO_set_fp(b, fp, BIO_NOCLOSE);
 148     ret = PEM_read_bio_PrivateKey(b, x, cb, u);
 149     BIO_free(b);
 150     return ret;
 151 }
 152
 153 int PEM_write_PrivateKey(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc,
 154                          const unsigned char *kstr, int klen,
 155                          pem_password_cb *cb, void *u)
 156 {
 157     BIO *b;
 158     int ret;
 159
 160     if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 161         PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
 162         return 0;
 163     }
 164     ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
 165     BIO_free(b);
 166     return ret;
 167 }
 168
 169 #endif
 170
 171 #ifndef OPENSSL_NO_DH
 172
 173 /* Transparently read in PKCS#3 or X9.42 DH parameters */
 174
 175 DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
 176 {
 177     DH *ret = NULL;
 178     EVP_PKEY *pkey = NULL;
 179     OSSL_STORE_CTX *ctx = NULL;
 180     OSSL_STORE_INFO *info = NULL;
 181     UI_METHOD *ui_method = NULL;
 182
 183     if ((ui_method = UI_UTIL_wrap_read_pem_callback(cb, 0)) == NULL)
 184         return NULL;
 185
 186     if ((ctx = ossl_store_attach_pem_bio(bp, ui_method, u)) == NULL)
 187         goto err;
 188
 189     while (!OSSL_STORE_eof(ctx) && (info = OSSL_STORE_load(ctx)) != NULL) {
 190         if (OSSL_STORE_INFO_get_type(info) == OSSL_STORE_INFO_PARAMS) {
 191             pkey = OSSL_STORE_INFO_get0_PARAMS(info);
 192             if (EVP_PKEY_id(pkey) == EVP_PKEY_DHX
 193                 || EVP_PKEY_id(pkey) == EVP_PKEY_DH) {
 194                 ret = EVP_PKEY_get1_DH(pkey);
 195                 break;
 196             }
 197         }
 198         OSSL_STORE_INFO_free(info);
 199     }
 200
 201     if (ret != NULL && x != NULL)
 202         *x = ret;
 203
 204  err:
 205     ossl_store_detach_pem_bio(ctx);
 206     UI_destroy_method(ui_method);
 207     OSSL_STORE_INFO_free(info);
 208     return ret;
 209 }
 210
 211 # ifndef OPENSSL_NO_STDIO
 212 DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
 213 {
 214     BIO *b;
 215     DH *ret;
 216
 217     if ((b = BIO_new(BIO_s_file())) == NULL) {
 218         PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
 219         return 0;
 220     }
 221     BIO_set_fp(b, fp, BIO_NOCLOSE);
 222     ret = PEM_read_bio_DHparams(b, x, cb, u);
 223     BIO_free(b);
 224     return ret;
 225 }
 226 # endif
 227
 228 #endif