openssl/crypto/evp/evp_pkey.c

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/* evp_pkey.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "cryptlib.h"
#include <openssl/x509.h>
#include <openssl/rand.h>
static int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8inf, EVP_PKEY *pkey);
/* Extract a private key from a PKCS8 structure */
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EVP_PKEY *EVP_PKCS82PKEY (PKCS8_PRIV_KEY_INFO *p8)
{
EVP_PKEY *pkey = NULL;
#ifndef NO_RSA
RSA *rsa = NULL;
#endif
#ifndef NO_DSA
DSA *dsa = NULL;
ASN1_INTEGER *privkey;
ASN1_TYPE *t1, *t2, *param = NULL;
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STACK_OF(ASN1_TYPE) *ndsa = NULL;
BN_CTX *ctx = NULL;
int plen;
#endif
X509_ALGOR *a;
unsigned char *p;
int pkeylen;
char obj_tmp[80];
if(p8->pkey->type == V_ASN1_OCTET_STRING) {
p8->broken = PKCS8_OK;
p = p8->pkey->value.octet_string->data;
pkeylen = p8->pkey->value.octet_string->length;
} else {
p8->broken = PKCS8_NO_OCTET;
p = p8->pkey->value.sequence->data;
pkeylen = p8->pkey->value.sequence->length;
}
if (!(pkey = EVP_PKEY_new())) {
EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
return NULL;
}
a = p8->pkeyalg;
switch (OBJ_obj2nid(a->algorithm))
{
#ifndef NO_RSA
case NID_rsaEncryption:
if (!(rsa = d2i_RSAPrivateKey (NULL, &p, pkeylen))) {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
return NULL;
}
EVP_PKEY_assign_RSA (pkey, rsa);
break;
#endif
#ifndef NO_DSA
case NID_dsa:
/* PKCS#8 DSA is weird: you just get a private key integer
* and parameters in the AlgorithmIdentifier the pubkey must
* be recalculated.
*/
/* Check for broken DSA PKCS#8, UGH! */
if(*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED)) {
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if(!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pkeylen,
d2i_ASN1_TYPE,
ASN1_TYPE_free))) {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
goto dsaerr;
}
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if(sk_ASN1_TYPE_num(ndsa) != 2 ) {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
goto dsaerr;
}
/* Handle Two broken types:
* SEQUENCE {parameters, priv_key}
* SEQUENCE {pub_key, priv_key}
*/
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t1 = sk_ASN1_TYPE_value(ndsa, 0);
t2 = sk_ASN1_TYPE_value(ndsa, 1);
if(t1->type == V_ASN1_SEQUENCE) {
p8->broken = PKCS8_EMBEDDED_PARAM;
param = t1;
} else if(a->parameter->type == V_ASN1_SEQUENCE) {
p8->broken = PKCS8_NS_DB;
param = a->parameter;
} else {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
goto dsaerr;
}
if(t2->type != V_ASN1_INTEGER) {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
goto dsaerr;
}
privkey = t2->value.integer;
} else {
if (!(privkey=d2i_ASN1_INTEGER (NULL, &p, pkeylen))) {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
goto dsaerr;
}
param = p8->pkeyalg->parameter;
}
if (!param || (param->type != V_ASN1_SEQUENCE)) {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
goto dsaerr;
}
p = param->value.sequence->data;
plen = param->value.sequence->length;
if (!(dsa = d2i_DSAparams (NULL, &p, plen))) {
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_DECODE_ERROR);
goto dsaerr;
}
/* We have parameters now set private key */
if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
EVPerr(EVP_F_EVP_PKCS82PKEY,EVP_R_BN_DECODE_ERROR);
goto dsaerr;
}
/* Calculate public key (ouch!) */
if (!(dsa->pub_key = BN_new())) {
EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
goto dsaerr;
}
if (!(ctx = BN_CTX_new())) {
EVPerr(EVP_F_EVP_PKCS82PKEY,ERR_R_MALLOC_FAILURE);
goto dsaerr;
}
if (!BN_mod_exp(dsa->pub_key, dsa->g,
dsa->priv_key, dsa->p, ctx)) {
EVPerr(EVP_F_EVP_PKCS82PKEY,EVP_R_BN_PUBKEY_ERROR);
goto dsaerr;
}
EVP_PKEY_assign_DSA(pkey, dsa);
BN_CTX_free (ctx);
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if(ndsa) sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
else ASN1_INTEGER_free(privkey);
break;
dsaerr:
BN_CTX_free (ctx);
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sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
DSA_free(dsa);
EVP_PKEY_free(pkey);
return NULL;
break;
#endif
default:
EVPerr(EVP_F_EVP_PKCS82PKEY, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
if (!a->algorithm) strcpy (obj_tmp, "NULL");
else i2t_ASN1_OBJECT(obj_tmp, 80, a->algorithm);
ERR_add_error_data(2, "TYPE=", obj_tmp);
EVP_PKEY_free (pkey);
return NULL;
}
return pkey;
}
PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey)
{
return EVP_PKEY2PKCS8_broken(pkey, PKCS8_OK);
}
/* Turn a private key into a PKCS8 structure */
PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8_broken(EVP_PKEY *pkey, int broken)
{
PKCS8_PRIV_KEY_INFO *p8;
if (!(p8 = PKCS8_PRIV_KEY_INFO_new())) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
return NULL;
}
p8->broken = broken;
ASN1_INTEGER_set (p8->version, 0);
if (!(p8->pkeyalg->parameter = ASN1_TYPE_new ())) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
PKCS8_PRIV_KEY_INFO_free (p8);
return NULL;
}
p8->pkey->type = V_ASN1_OCTET_STRING;
switch (EVP_PKEY_type(pkey->type)) {
#ifndef NO_RSA
case EVP_PKEY_RSA:
if(p8->broken == PKCS8_NO_OCTET) p8->pkey->type = V_ASN1_SEQUENCE;
p8->pkeyalg->algorithm = OBJ_nid2obj(NID_rsaEncryption);
p8->pkeyalg->parameter->type = V_ASN1_NULL;
if (!ASN1_pack_string ((char *)pkey, i2d_PrivateKey,
&p8->pkey->value.octet_string)) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
PKCS8_PRIV_KEY_INFO_free (p8);
return NULL;
}
break;
#endif
#ifndef NO_DSA
case EVP_PKEY_DSA:
if(!dsa_pkey2pkcs8(p8, pkey)) {
PKCS8_PRIV_KEY_INFO_free (p8);
return NULL;
}
break;
#endif
default:
EVPerr(EVP_F_EVP_PKEY2PKCS8, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
PKCS8_PRIV_KEY_INFO_free (p8);
return NULL;
}
RAND_add(p8->pkey->value.octet_string->data,
p8->pkey->value.octet_string->length, 0);
return p8;
}
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PKCS8_PRIV_KEY_INFO *PKCS8_set_broken(PKCS8_PRIV_KEY_INFO *p8, int broken)
{
switch (broken) {
case PKCS8_OK:
p8->broken = PKCS8_OK;
return p8;
break;
case PKCS8_NO_OCTET:
p8->broken = PKCS8_NO_OCTET;
p8->pkey->type = V_ASN1_SEQUENCE;
return p8;
break;
default:
EVPerr(EVP_F_EVP_PKCS8_SET_BROKEN,EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE);
return NULL;
break;
}
}
#ifndef NO_DSA
static int dsa_pkey2pkcs8(PKCS8_PRIV_KEY_INFO *p8, EVP_PKEY *pkey)
{
ASN1_STRING *params;
ASN1_INTEGER *prkey;
ASN1_TYPE *ttmp;
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STACK_OF(ASN1_TYPE) *ndsa;
unsigned char *p, *q;
int len;
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p8->pkeyalg->algorithm = OBJ_nid2obj(NID_dsa);
len = i2d_DSAparams (pkey->pkey.dsa, NULL);
if (!(p = OPENSSL_malloc(len))) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
PKCS8_PRIV_KEY_INFO_free (p8);
return 0;
}
q = p;
i2d_DSAparams (pkey->pkey.dsa, &q);
params = ASN1_STRING_new();
ASN1_STRING_set(params, p, len);
OPENSSL_free(p);
/* Get private key into integer */
if (!(prkey = BN_to_ASN1_INTEGER (pkey->pkey.dsa->priv_key, NULL))) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,EVP_R_ENCODE_ERROR);
return 0;
}
switch(p8->broken) {
case PKCS8_OK:
case PKCS8_NO_OCTET:
if (!ASN1_pack_string((char *)prkey, i2d_ASN1_INTEGER,
&p8->pkey->value.octet_string)) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
M_ASN1_INTEGER_free (prkey);
return 0;
}
M_ASN1_INTEGER_free (prkey);
p8->pkeyalg->parameter->value.sequence = params;
p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
break;
case PKCS8_NS_DB:
p8->pkeyalg->parameter->value.sequence = params;
p8->pkeyalg->parameter->type = V_ASN1_SEQUENCE;
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ndsa = sk_ASN1_TYPE_new_null();
ttmp = ASN1_TYPE_new();
if (!(ttmp->value.integer = BN_to_ASN1_INTEGER (pkey->pkey.dsa->pub_key, NULL))) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,EVP_R_ENCODE_ERROR);
PKCS8_PRIV_KEY_INFO_free(p8);
return 0;
}
ttmp->type = V_ASN1_INTEGER;
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sk_ASN1_TYPE_push(ndsa, ttmp);
ttmp = ASN1_TYPE_new();
ttmp->value.integer = prkey;
ttmp->type = V_ASN1_INTEGER;
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sk_ASN1_TYPE_push(ndsa, ttmp);
p8->pkey->value.octet_string = ASN1_OCTET_STRING_new();
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if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
&p8->pkey->value.octet_string->data,
&p8->pkey->value.octet_string->length)) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
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sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
M_ASN1_INTEGER_free(prkey);
return 0;
}
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sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
break;
case PKCS8_EMBEDDED_PARAM:
p8->pkeyalg->parameter->type = V_ASN1_NULL;
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ndsa = sk_ASN1_TYPE_new_null();
ttmp = ASN1_TYPE_new();
ttmp->value.sequence = params;
ttmp->type = V_ASN1_SEQUENCE;
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sk_ASN1_TYPE_push(ndsa, ttmp);
ttmp = ASN1_TYPE_new();
ttmp->value.integer = prkey;
ttmp->type = V_ASN1_INTEGER;
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sk_ASN1_TYPE_push(ndsa, ttmp);
p8->pkey->value.octet_string = ASN1_OCTET_STRING_new();
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if (!ASN1_seq_pack_ASN1_TYPE(ndsa, i2d_ASN1_TYPE,
&p8->pkey->value.octet_string->data,
&p8->pkey->value.octet_string->length)) {
EVPerr(EVP_F_EVP_PKEY2PKCS8,ERR_R_MALLOC_FAILURE);
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sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
M_ASN1_INTEGER_free (prkey);
return 0;
}
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sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
break;
}
return 1;
}
#endif