crypto/pem/pem_pk8.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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
  19 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,
  20                       int nid, const EVP_CIPHER *enc,
  21                       char *kstr, int klen, pem_password_cb *cb, void *u);
  22
  23 #ifndef OPENSSL_NO_STDIO
  24 static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,
  25                          int nid, const EVP_CIPHER *enc,
  26                          char *kstr, int klen, pem_password_cb *cb, void *u);
  27 #endif
  28 /*
  29  * These functions write a private key in PKCS#8 format: it is a "drop in"
  30  * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
  31  * is NULL then it uses the unencrypted private key form. The 'nid' versions
  32  * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
  33  */
  34
  35 int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,
  36                                       char *kstr, int klen,
  37                                       pem_password_cb *cb, void *u)
  38 {
  39     return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
  40 }
  41
  42 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
  43                                   char *kstr, int klen,
  44                                   pem_password_cb *cb, void *u)
  45 {
  46     return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
  47 }
  48
  49 int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
  50                             char *kstr, int klen,
  51                             pem_password_cb *cb, void *u)
  52 {
  53     return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
  54 }
  55
  56 int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
  57                                 char *kstr, int klen,
  58                                 pem_password_cb *cb, void *u)
  59 {
  60     return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
  61 }
  62
  63 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid,
  64                       const EVP_CIPHER *enc, char *kstr, int klen,
  65                       pem_password_cb *cb, void *u)
  66 {
  67     X509_SIG *p8;
  68     PKCS8_PRIV_KEY_INFO *p8inf;
  69     char buf[PEM_BUFSIZE];
  70     int ret;
  71
  72     if ((p8inf = EVP_PKEY2PKCS8(x)) == NULL) {
  73         PEMerr(PEM_F_DO_PK8PKEY, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
  74         return 0;
  75     }
  76     if (enc || (nid != -1)) {
  77         if (!kstr) {
  78             if (!cb)
  79                 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
  80             else
  81                 klen = cb(buf, PEM_BUFSIZE, 1, u);
  82             if (klen <= 0) {
  83                 PEMerr(PEM_F_DO_PK8PKEY, PEM_R_READ_KEY);
  84                 PKCS8_PRIV_KEY_INFO_free(p8inf);
  85                 return 0;
  86             }
  87
  88             kstr = buf;
  89         }
  90         p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
  91         if (kstr == buf)
  92             OPENSSL_cleanse(buf, klen);
  93         PKCS8_PRIV_KEY_INFO_free(p8inf);
  94         if (p8 == NULL)
  95             return 0;
  96         if (isder)
  97             ret = i2d_PKCS8_bio(bp, p8);
  98         else
  99             ret = PEM_write_bio_PKCS8(bp, p8);
 100         X509_SIG_free(p8);
 101         return ret;
 102     } else {
 103         if (isder)
 104             ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
 105         else
 106             ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
 107         PKCS8_PRIV_KEY_INFO_free(p8inf);
 108         return ret;
 109     }
 110 }
 111
 112 EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
 113                                   void *u)
 114 {
 115     PKCS8_PRIV_KEY_INFO *p8inf = NULL;
 116     X509_SIG *p8 = NULL;
 117     int klen;
 118     EVP_PKEY *ret;
 119     char psbuf[PEM_BUFSIZE];
 120     p8 = d2i_PKCS8_bio(bp, NULL);
 121     if (!p8)
 122         return NULL;
 123     if (cb)
 124         klen = cb(psbuf, PEM_BUFSIZE, 0, u);
 125     else
 126         klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
 127     if (klen <= 0) {
 128         PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
 129         X509_SIG_free(p8);
 130         return NULL;
 131     }
 132     p8inf = PKCS8_decrypt(p8, psbuf, klen);
 133     X509_SIG_free(p8);
 134     OPENSSL_cleanse(psbuf, klen);
 135     if (!p8inf)
 136         return NULL;
 137     ret = EVP_PKCS82PKEY(p8inf);
 138     PKCS8_PRIV_KEY_INFO_free(p8inf);
 139     if (!ret)
 140         return NULL;
 141     if (x) {
 142         EVP_PKEY_free(*x);
 143         *x = ret;
 144     }
 145     return ret;
 146 }
 147
 148 #ifndef OPENSSL_NO_STDIO
 149
 150 int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
 151                            char *kstr, int klen, pem_password_cb *cb, void *u)
 152 {
 153     return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);
 154 }
 155
 156 int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,
 157                                char *kstr, int klen,
 158                                pem_password_cb *cb, void *u)
 159 {
 160     return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);
 161 }
 162
 163 int PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid,
 164                                   char *kstr, int klen,
 165                                   pem_password_cb *cb, void *u)
 166 {
 167     return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);
 168 }
 169
 170 int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
 171                               char *kstr, int klen, pem_password_cb *cb,
 172                               void *u)
 173 {
 174     return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);
 175 }
 176
 177 static int do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid,
 178                          const EVP_CIPHER *enc, char *kstr, int klen,
 179                          pem_password_cb *cb, void *u)
 180 {
 181     BIO *bp;
 182     int ret;
 183
 184     if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 185         PEMerr(PEM_F_DO_PK8PKEY_FP, ERR_R_BUF_LIB);
 186         return (0);
 187     }
 188     ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);
 189     BIO_free(bp);
 190     return ret;
 191 }
 192
 193 EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
 194                                  void *u)
 195 {
 196     BIO *bp;
 197     EVP_PKEY *ret;
 198
 199     if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 200         PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP, ERR_R_BUF_LIB);
 201         return NULL;
 202     }
 203     ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
 204     BIO_free(bp);
 205     return ret;
 206 }
 207
 208 #endif
 209
 210 IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG)
 211
 212
 213 IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF,
 214              PKCS8_PRIV_KEY_INFO)