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373 lines
9.0 KiB
373 lines
9.0 KiB
/* crypto/asn1/x_pubkey.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/x509.h>
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#include "asn1_locl.h"
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#ifndef OPENSSL_NO_RSA
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#include <openssl/rsa.h>
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#endif
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#ifndef OPENSSL_NO_DSA
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#include <openssl/dsa.h>
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#endif
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/* Minor tweak to operation: free up EVP_PKEY */
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static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
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void *exarg)
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{
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if (operation == ASN1_OP_FREE_POST)
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{
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X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
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EVP_PKEY_free(pubkey->pkey);
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}
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return 1;
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}
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ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
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ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
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ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
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} ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
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IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
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int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
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{
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X509_PUBKEY *pk=NULL;
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if (x == NULL) return(0);
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if ((pk=X509_PUBKEY_new()) == NULL) goto error;
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if (pkey->ameth)
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{
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if (pkey->ameth->pub_encode)
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{
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if (!pkey->ameth->pub_encode(pk, pkey))
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{
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X509err(X509_F_X509_PUBKEY_SET,
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X509_R_PUBLIC_KEY_ENCODE_ERROR);
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goto error;
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}
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}
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else
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{
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X509err(X509_F_X509_PUBKEY_SET,
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X509_R_METHOD_NOT_SUPPORTED);
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goto error;
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}
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}
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else
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{
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X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
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goto error;
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}
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if (*x != NULL)
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X509_PUBKEY_free(*x);
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*x=pk;
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return 1;
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error:
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if (pk != NULL) X509_PUBKEY_free(pk);
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return 0;
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}
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EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
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{
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EVP_PKEY *ret=NULL;
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if (key == NULL) goto error;
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if (key->pkey != NULL)
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{
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CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
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return key->pkey;
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}
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if (key->public_key == NULL) goto error;
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if ((ret = EVP_PKEY_new()) == NULL)
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{
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X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
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goto error;
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}
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if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm)))
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{
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X509err(X509_F_X509_PUBKEY_GET,X509_R_UNSUPPORTED_ALGORITHM);
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goto error;
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}
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if (ret->ameth->pub_decode)
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{
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if (!ret->ameth->pub_decode(ret, key))
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{
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X509err(X509_F_X509_PUBKEY_GET,
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X509_R_PUBLIC_KEY_DECODE_ERROR);
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goto error;
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}
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}
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else
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{
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X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED);
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goto error;
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}
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key->pkey = ret;
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CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
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return ret;
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error:
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if (ret != NULL)
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EVP_PKEY_free(ret);
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return(NULL);
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}
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/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
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* and encode or decode as X509_PUBKEY
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*/
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EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp,
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long length)
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{
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X509_PUBKEY *xpk;
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EVP_PKEY *pktmp;
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xpk = d2i_X509_PUBKEY(NULL, pp, length);
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if(!xpk) return NULL;
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pktmp = X509_PUBKEY_get(xpk);
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X509_PUBKEY_free(xpk);
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if(!pktmp) return NULL;
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if(a)
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{
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EVP_PKEY_free(*a);
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*a = pktmp;
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}
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return pktmp;
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}
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int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
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{
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X509_PUBKEY *xpk=NULL;
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int ret;
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if(!a) return 0;
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if(!X509_PUBKEY_set(&xpk, a)) return 0;
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ret = i2d_X509_PUBKEY(xpk, pp);
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X509_PUBKEY_free(xpk);
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return ret;
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}
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/* The following are equivalents but which return RSA and DSA
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* keys
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*/
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#ifndef OPENSSL_NO_RSA
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RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp,
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long length)
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{
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EVP_PKEY *pkey;
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RSA *key;
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const unsigned char *q;
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q = *pp;
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pkey = d2i_PUBKEY(NULL, &q, length);
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if (!pkey) return NULL;
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key = EVP_PKEY_get1_RSA(pkey);
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EVP_PKEY_free(pkey);
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if (!key) return NULL;
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*pp = q;
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if (a)
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{
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RSA_free(*a);
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*a = key;
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}
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return key;
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}
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int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
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{
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EVP_PKEY *pktmp;
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int ret;
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if (!a) return 0;
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pktmp = EVP_PKEY_new();
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if (!pktmp)
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{
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ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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EVP_PKEY_set1_RSA(pktmp, a);
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ret = i2d_PUBKEY(pktmp, pp);
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EVP_PKEY_free(pktmp);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_DSA
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DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp,
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long length)
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{
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EVP_PKEY *pkey;
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DSA *key;
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const unsigned char *q;
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q = *pp;
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pkey = d2i_PUBKEY(NULL, &q, length);
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if (!pkey) return NULL;
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key = EVP_PKEY_get1_DSA(pkey);
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EVP_PKEY_free(pkey);
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if (!key) return NULL;
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*pp = q;
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if (a)
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{
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DSA_free(*a);
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*a = key;
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}
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return key;
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}
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int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
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{
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EVP_PKEY *pktmp;
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int ret;
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if(!a) return 0;
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pktmp = EVP_PKEY_new();
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if(!pktmp)
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{
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ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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EVP_PKEY_set1_DSA(pktmp, a);
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ret = i2d_PUBKEY(pktmp, pp);
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EVP_PKEY_free(pktmp);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_EC
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EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
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{
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EVP_PKEY *pkey;
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EC_KEY *key;
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const unsigned char *q;
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q = *pp;
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pkey = d2i_PUBKEY(NULL, &q, length);
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if (!pkey) return(NULL);
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key = EVP_PKEY_get1_EC_KEY(pkey);
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EVP_PKEY_free(pkey);
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if (!key) return(NULL);
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*pp = q;
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if (a)
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{
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EC_KEY_free(*a);
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*a = key;
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}
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return(key);
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}
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int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
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{
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EVP_PKEY *pktmp;
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int ret;
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if (!a) return(0);
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if ((pktmp = EVP_PKEY_new()) == NULL)
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{
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ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE);
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return(0);
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}
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EVP_PKEY_set1_EC_KEY(pktmp, a);
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ret = i2d_PUBKEY(pktmp, pp);
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EVP_PKEY_free(pktmp);
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return(ret);
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}
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#endif
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int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj,
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int ptype, void *pval,
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unsigned char *penc, int penclen)
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{
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if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
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return 0;
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if (penc)
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{
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if (pub->public_key->data)
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OPENSSL_free(pub->public_key->data);
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pub->public_key->data = penc;
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pub->public_key->length = penclen;
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/* Set number of unused bits to zero */
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pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
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pub->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
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}
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return 1;
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}
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int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg,
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const unsigned char **pk, int *ppklen,
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X509_ALGOR **pa,
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X509_PUBKEY *pub)
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{
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if (ppkalg)
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*ppkalg = pub->algor->algorithm;
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if (pk)
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{
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*pk = pub->public_key->data;
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*ppklen = pub->public_key->length;
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}
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if (pa)
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*pa = pub->algor;
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return 1;
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}
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