crypto/pem/pem_pk8.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
  19 static int do_pk8pkey(BIO *bp, const EVP_PKEY *x, int isder,
  20                       int nid, const EVP_CIPHER *enc,
  21                       const char *kstr, int klen,
  22                       pem_password_cb *cb, void *u);
  23
  24 #ifndef OPENSSL_NO_STDIO
  25 static int do_pk8pkey_fp(FILE *bp, const EVP_PKEY *x, int isder,
  26                          int nid, const EVP_CIPHER *enc,
  27                          const char *kstr, int klen,
  28                          pem_password_cb *cb, void *u);
  29 #endif
  30 /*
  31  * These functions write a private key in PKCS#8 format: it is a "drop in"
  32  * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
  33  * is NULL then it uses the unencrypted private key form. The 'nid' versions
  34  * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
  35  */
  36
  37 int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, const EVP_PKEY *x, int nid,
  38                                       const char *kstr, int klen,
  39                                       pem_password_cb *cb, void *u)
  40 {
  41     return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
  42 }
  43
  44 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, const EVP_PKEY *x, const EVP_CIPHER *enc,
  45                                   const char *kstr, int klen,
  46                                   pem_password_cb *cb, void *u)
  47 {
  48     return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
  49 }
  50
  51 int i2d_PKCS8PrivateKey_bio(BIO *bp, const EVP_PKEY *x, const EVP_CIPHER *enc,
  52                             const char *kstr, int klen,
  53                             pem_password_cb *cb, void *u)
  54 {
  55     return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
  56 }
  57
  58 int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, const EVP_PKEY *x, int nid,
  59                                 const char *kstr, int klen,
  60                                 pem_password_cb *cb, void *u)
  61 {
  62     return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
  63 }
  64
  65 static int do_pk8pkey(BIO *bp, const EVP_PKEY *x, int isder, int nid,
  66                       const EVP_CIPHER *enc, const char *kstr, int klen,
  67                       pem_password_cb *cb, void *u)
  68 {
  69     X509_SIG *p8;
  70     PKCS8_PRIV_KEY_INFO *p8inf;
  71     char buf[PEM_BUFSIZE];
  72     int ret;
  73
  74     if ((p8inf = EVP_PKEY2PKCS8(x)) == NULL) {
  75         PEMerr(PEM_F_DO_PK8PKEY, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
  76         return 0;
  77     }
  78     if (enc || (nid != -1)) {
  79         if (!kstr) {
  80             if (!cb)
  81                 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
  82             else
  83                 klen = cb(buf, PEM_BUFSIZE, 1, u);
  84             if (klen <= 0) {
  85                 PEMerr(PEM_F_DO_PK8PKEY, PEM_R_READ_KEY);
  86                 PKCS8_PRIV_KEY_INFO_free(p8inf);
  87                 return 0;
  88             }
  89
  90             kstr = buf;
  91         }
  92         p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
  93         if (kstr == buf)
  94             OPENSSL_cleanse(buf, klen);
  95         PKCS8_PRIV_KEY_INFO_free(p8inf);
  96         if (p8 == NULL)
  97             return 0;
  98         if (isder)
  99             ret = i2d_PKCS8_bio(bp, p8);
 100         else
 101             ret = PEM_write_bio_PKCS8(bp, p8);
 102         X509_SIG_free(p8);
 103         return ret;
 104     } else {
 105         if (isder)
 106             ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
 107         else
 108             ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
 109         PKCS8_PRIV_KEY_INFO_free(p8inf);
 110         return ret;
 111     }
 112 }
 113
 114 EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
 115                                   void *u)
 116 {
 117     PKCS8_PRIV_KEY_INFO *p8inf = NULL;
 118     X509_SIG *p8 = NULL;
 119     int klen;
 120     EVP_PKEY *ret;
 121     char psbuf[PEM_BUFSIZE];
 122
 123     p8 = d2i_PKCS8_bio(bp, NULL);
 124     if (p8 == NULL)
 125         return NULL;
 126     if (cb != NULL)
 127         klen = cb(psbuf, PEM_BUFSIZE, 0, u);
 128     else
 129         klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
 130     if (klen < 0) {
 131         PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
 132         X509_SIG_free(p8);
 133         return NULL;
 134     }
 135     p8inf = PKCS8_decrypt(p8, psbuf, klen);
 136     X509_SIG_free(p8);
 137     OPENSSL_cleanse(psbuf, klen);
 138     if (p8inf == NULL)
 139         return NULL;
 140     ret = EVP_PKCS82PKEY(p8inf);
 141     PKCS8_PRIV_KEY_INFO_free(p8inf);
 142     if (!ret)
 143         return NULL;
 144     if (x != NULL) {
 145         EVP_PKEY_free(*x);
 146         *x = ret;
 147     }
 148     return ret;
 149 }
 150
 151 #ifndef OPENSSL_NO_STDIO
 152
 153 int i2d_PKCS8PrivateKey_fp(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc,
 154                            const char *kstr, int klen,
 155                            pem_password_cb *cb, void *u)
 156 {
 157     return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);
 158 }
 159
 160 int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, const EVP_PKEY *x, int nid,
 161                                const char *kstr, int klen,
 162                                pem_password_cb *cb, void *u)
 163 {
 164     return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);
 165 }
 166
 167 int PEM_write_PKCS8PrivateKey_nid(FILE *fp, const EVP_PKEY *x, int nid,
 168                                   const char *kstr, int klen,
 169                                   pem_password_cb *cb, void *u)
 170 {
 171     return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);
 172 }
 173
 174 int PEM_write_PKCS8PrivateKey(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc,
 175                               const char *kstr, int klen,
 176                               pem_password_cb *cb, void *u)
 177 {
 178     return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);
 179 }
 180
 181 static int do_pk8pkey_fp(FILE *fp, const EVP_PKEY *x, int isder, int nid,
 182                          const EVP_CIPHER *enc, const char *kstr, int klen,
 183                          pem_password_cb *cb, void *u)
 184 {
 185     BIO *bp;
 186     int ret;
 187
 188     if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 189         PEMerr(PEM_F_DO_PK8PKEY_FP, ERR_R_BUF_LIB);
 190         return 0;
 191     }
 192     ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);
 193     BIO_free(bp);
 194     return ret;
 195 }
 196
 197 EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
 198                                  void *u)
 199 {
 200     BIO *bp;
 201     EVP_PKEY *ret;
 202
 203     if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
 204         PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP, ERR_R_BUF_LIB);
 205         return NULL;
 206     }
 207     ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
 208     BIO_free(bp);
 209     return ret;
 210 }
 211
 212 #endif
 213
 214 IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG)
 215
 216
 217 IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF,
 218              PKCS8_PRIV_KEY_INFO)