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/rand.h>
  16 #include <openssl/x509.h>
  17 #include <openssl/pkcs12.h>
  18 #include <openssl/pem.h>
  19
  20 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,
  21                       int nid, const EVP_CIPHER *enc,
  22                       char *kstr, int klen, pem_password_cb *cb, void *u);
  23
  24 #ifndef OPENSSL_NO_STDIO
  25 static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,
  26                          int nid, const EVP_CIPHER *enc,
  27                          char *kstr, int klen, pem_password_cb *cb, void *u);
  28 #endif
  29 /*
  30  * These functions write a private key in PKCS#8 format: it is a "drop in"
  31  * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
  32  * is NULL then it uses the unencrypted private key form. The 'nid' versions
  33  * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
  34  */
  35
  36 int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,
  37                                       char *kstr, int klen,
  38                                       pem_password_cb *cb, void *u)
  39 {
  40     return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
  41 }
  42
  43 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
  44                                   char *kstr, int klen,
  45                                   pem_password_cb *cb, void *u)
  46 {
  47     return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
  48 }
  49
  50 int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
  51                             char *kstr, int klen,
  52                             pem_password_cb *cb, void *u)
  53 {
  54     return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
  55 }
  56
  57 int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
  58                                 char *kstr, int klen,
  59                                 pem_password_cb *cb, void *u)
  60 {
  61     return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
  62 }
  63
  64 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid,
  65                       const EVP_CIPHER *enc, char *kstr, int klen,
  66                       pem_password_cb *cb, void *u)
  67 {
  68     X509_SIG *p8;
  69     PKCS8_PRIV_KEY_INFO *p8inf;
  70     char buf[PEM_BUFSIZE];
  71     int ret;
  72
  73     if ((p8inf = EVP_PKEY2PKCS8(x)) == NULL) {
  74         PEMerr(PEM_F_DO_PK8PKEY, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
  75         return 0;
  76     }
  77     if (enc || (nid != -1)) {
  78         if (!kstr) {
  79             if (!cb)
  80                 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
  81             else
  82                 klen = cb(buf, PEM_BUFSIZE, 1, u);
  83             if (klen <= 0) {
  84                 PEMerr(PEM_F_DO_PK8PKEY, PEM_R_READ_KEY);
  85                 PKCS8_PRIV_KEY_INFO_free(p8inf);
  86                 return 0;
  87             }
  88
  89             kstr = buf;
  90         }
  91         p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
  92         if (kstr == buf)
  93             OPENSSL_cleanse(buf, klen);
  94         PKCS8_PRIV_KEY_INFO_free(p8inf);
  95         if (p8 == NULL)
  96             return 0;
  97         if (isder)
  98             ret = i2d_PKCS8_bio(bp, p8);
  99         else
 100             ret = PEM_write_bio_PKCS8(bp, p8);
 101         X509_SIG_free(p8);
 102         return ret;
 103     } else {
 104         if (isder)
 105             ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
 106         else
 107             ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
 108         PKCS8_PRIV_KEY_INFO_free(p8inf);
 109         return ret;
 110     }
 111 }
 112
 113 EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
 114                                   void *u)
 115 {
 116     PKCS8_PRIV_KEY_INFO *p8inf = NULL;
 117     X509_SIG *p8 = NULL;
 118     int klen;
 119     EVP_PKEY *ret;
 120     char psbuf[PEM_BUFSIZE];
 121     p8 = d2i_PKCS8_bio(bp, NULL);
 122     if (!p8)
 123         return NULL;
 124     if (cb)
 125         klen = cb(psbuf, PEM_BUFSIZE, 0, u);
 126     else
 127         klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
 128     if (klen <= 0) {
 129         PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
 130         X509_SIG_free(p8);
 131         return NULL;
 132     }
 133     p8inf = PKCS8_decrypt(p8, psbuf, klen);
 134     X509_SIG_free(p8);
 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)