Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/asn1/d2i_pr.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include "cryptlib.h" |
| 61 | #include <openssl/bn.h> |
| 62 | #include <openssl/evp.h> |
| 63 | #include <openssl/objects.h> |
| 64 | #ifndef OPENSSL_NO_ENGINE |
| 65 | #include <openssl/engine.h> |
| 66 | #endif |
| 67 | #include <openssl/x509.h> |
| 68 | #include <openssl/asn1.h> |
| 69 | #include "asn1_locl.h" |
| 70 | |
| 71 | EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, |
| 72 | long length) |
| 73 | { |
| 74 | EVP_PKEY *ret; |
| 75 | |
| 76 | if ((a == NULL) || (*a == NULL)) |
| 77 | { |
| 78 | if ((ret=EVP_PKEY_new()) == NULL) |
| 79 | { |
| 80 | ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB); |
| 81 | return(NULL); |
| 82 | } |
| 83 | } |
| 84 | else |
| 85 | { |
| 86 | ret= *a; |
| 87 | #ifndef OPENSSL_NO_ENGINE |
| 88 | if (ret->engine) |
| 89 | { |
| 90 | ENGINE_finish(ret->engine); |
| 91 | ret->engine = NULL; |
| 92 | } |
| 93 | #endif |
| 94 | } |
| 95 | |
| 96 | if (!EVP_PKEY_set_type(ret, type)) |
| 97 | { |
| 98 | ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE); |
| 99 | goto err; |
| 100 | } |
| 101 | |
| 102 | if (!ret->ameth->old_priv_decode || |
| 103 | !ret->ameth->old_priv_decode(ret, pp, length)) |
| 104 | { |
| 105 | if (ret->ameth->priv_decode) |
| 106 | { |
| 107 | PKCS8_PRIV_KEY_INFO *p8=NULL; |
| 108 | p8=d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length); |
| 109 | if (!p8) goto err; |
| 110 | EVP_PKEY_free(ret); |
| 111 | ret = EVP_PKCS82PKEY(p8); |
| 112 | PKCS8_PRIV_KEY_INFO_free(p8); |
| 113 | |
| 114 | } |
| 115 | else |
| 116 | { |
| 117 | ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB); |
| 118 | goto err; |
| 119 | } |
| 120 | } |
| 121 | if (a != NULL) (*a)=ret; |
| 122 | return(ret); |
| 123 | err: |
| 124 | if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret); |
| 125 | return(NULL); |
| 126 | } |
| 127 | |
| 128 | /* This works like d2i_PrivateKey() except it automatically works out the type */ |
| 129 | |
| 130 | EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp, |
| 131 | long length) |
| 132 | { |
| 133 | STACK_OF(ASN1_TYPE) *inkey; |
| 134 | const unsigned char *p; |
| 135 | int keytype; |
| 136 | p = *pp; |
| 137 | /* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE): |
| 138 | * by analyzing it we can determine the passed structure: this |
| 139 | * assumes the input is surrounded by an ASN1 SEQUENCE. |
| 140 | */ |
| 141 | inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length); |
| 142 | /* Since we only need to discern "traditional format" RSA and DSA |
| 143 | * keys we can just count the elements. |
| 144 | */ |
| 145 | if(sk_ASN1_TYPE_num(inkey) == 6) |
| 146 | keytype = EVP_PKEY_DSA; |
| 147 | else if (sk_ASN1_TYPE_num(inkey) == 4) |
| 148 | keytype = EVP_PKEY_EC; |
| 149 | else if (sk_ASN1_TYPE_num(inkey) == 3) |
| 150 | { /* This seems to be PKCS8, not traditional format */ |
| 151 | PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL,pp,length); |
| 152 | EVP_PKEY *ret; |
| 153 | |
| 154 | sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); |
| 155 | if (!p8) |
| 156 | { |
| 157 | ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE); |
| 158 | return NULL; |
| 159 | } |
| 160 | ret = EVP_PKCS82PKEY(p8); |
| 161 | PKCS8_PRIV_KEY_INFO_free(p8); |
| 162 | if (a) { |
| 163 | *a = ret; |
| 164 | } |
| 165 | return ret; |
| 166 | } |
| 167 | else keytype = EVP_PKEY_RSA; |
| 168 | sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free); |
| 169 | return d2i_PrivateKey(keytype, a, pp, length); |
| 170 | } |