1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to.  The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 *    notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 *    notice, this list of conditions and the following disclaimer in the
29 *    documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 *    must display the following acknowledgement:
32 *    "This product includes cryptographic software written by
33 *     Eric Young (eay@cryptsoft.com)"
34 *    The word 'cryptographic' can be left out if the rouines from the library
35 *    being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 *    the apps directory (application code) you must include an acknowledgement:
38 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed.  i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/evp.h>
58
59#include <openssl/asn1.h>
60#include <openssl/err.h>
61#include <openssl/obj.h>
62#include <openssl/x509.h>
63
64#include "internal.h"
65
66
67EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **out, const uint8_t **inp,
68                         long len) {
69  EVP_PKEY *ret;
70
71  if (out == NULL || *out == NULL) {
72    ret = EVP_PKEY_new();
73    if (ret == NULL) {
74      OPENSSL_PUT_ERROR(EVP, ERR_R_EVP_LIB);
75      return NULL;
76    }
77  } else {
78    ret = *out;
79  }
80
81  if (!EVP_PKEY_set_type(ret, type)) {
82    OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_PUBLIC_KEY_TYPE);
83    goto err;
84  }
85
86  const uint8_t *in = *inp;
87  if (!ret->ameth->old_priv_decode ||
88      !ret->ameth->old_priv_decode(ret, &in, len)) {
89    if (ret->ameth->priv_decode) {
90      /* Reset |in| in case |old_priv_decode| advanced it on error. */
91      in = *inp;
92      PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &in, len);
93      if (!p8) {
94        goto err;
95      }
96      EVP_PKEY_free(ret);
97      ret = EVP_PKCS82PKEY(p8);
98      PKCS8_PRIV_KEY_INFO_free(p8);
99      if (ret == NULL) {
100        goto err;
101      }
102    } else {
103      OPENSSL_PUT_ERROR(EVP, ERR_R_ASN1_LIB);
104      goto err;
105    }
106  }
107
108  if (out != NULL) {
109    *out = ret;
110  }
111  *inp = in;
112  return ret;
113
114err:
115  if (out == NULL || *out != ret) {
116    EVP_PKEY_free(ret);
117  }
118  return NULL;
119}
120
121EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **out, const uint8_t **inp, long len) {
122  STACK_OF(ASN1_TYPE) *inkey;
123  const uint8_t *p;
124  int keytype;
125  p = *inp;
126
127  /* Dirty trick: read in the ASN1 data into out STACK_OF(ASN1_TYPE):
128   * by analyzing it we can determine the passed structure: this
129   * assumes the input is surrounded by an ASN1 SEQUENCE. */
130  inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, len);
131  /* Since we only need to discern "traditional format" RSA and DSA
132   * keys we can just count the elements. */
133  if (sk_ASN1_TYPE_num(inkey) == 6) {
134    keytype = EVP_PKEY_DSA;
135  } else if (sk_ASN1_TYPE_num(inkey) == 4) {
136    keytype = EVP_PKEY_EC;
137  } else if (sk_ASN1_TYPE_num(inkey) == 3) {
138    /* This seems to be PKCS8, not traditional format */
139    p = *inp;
140    PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
141    EVP_PKEY *ret;
142
143    sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
144    if (!p8) {
145      OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
146      return NULL;
147    }
148    ret = EVP_PKCS82PKEY(p8);
149    PKCS8_PRIV_KEY_INFO_free(p8);
150    if (ret == NULL) {
151      return NULL;
152    }
153
154    *inp = p;
155    if (out) {
156      *out = ret;
157    }
158    return ret;
159  } else {
160    keytype = EVP_PKEY_RSA;
161  }
162
163  sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
164  return d2i_PrivateKey(keytype, out, inp, len);
165}
166
167int i2d_PublicKey(EVP_PKEY *key, uint8_t **outp) {
168  switch (key->type) {
169    case EVP_PKEY_RSA:
170      return i2d_RSAPublicKey(key->pkey.rsa, outp);
171    case EVP_PKEY_DSA:
172      return i2d_DSAPublicKey(key->pkey.dsa, outp);
173    case EVP_PKEY_EC:
174      return i2o_ECPublicKey(key->pkey.ec, outp);
175    default:
176      OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
177      return -1;
178  }
179}
180