x_pubkey.c 8.6 KB
Newer Older
1
/* crypto/asn1/x_pubkey.c */
2
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include "cryptlib.h"
D
 
Dr. Stephen Henson 已提交
61
#include <openssl/asn1t.h>
62
#include <openssl/x509.h>
63

D
 
Dr. Stephen Henson 已提交
64 65 66 67 68 69
/* Minor tweak to operation: free up EVP_PKEY */
static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
{
	if(operation == ASN1_OP_FREE_POST) {
		X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
		EVP_PKEY_free(pubkey->pkey);
70
	}
D
 
Dr. Stephen Henson 已提交
71 72
	return 1;
}
73

D
 
Dr. Stephen Henson 已提交
74 75 76
ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
	ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
	ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
77
} ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
78

D
 
Dr. Stephen Henson 已提交
79
IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
80

U
Ulf Möller 已提交
81
int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
	{
	int ok=0;
	X509_PUBKEY *pk;
	X509_ALGOR *a;
	ASN1_OBJECT *o;
	unsigned char *s,*p;
	int i;

	if (x == NULL) return(0);

	if ((pk=X509_PUBKEY_new()) == NULL) goto err;
	a=pk->algor;

	/* set the algorithm id */
	if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
	ASN1_OBJECT_free(a->algorithm);
	a->algorithm=o;

	/* Set the parameter list */
	if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
		{
		if ((a->parameter == NULL) ||
			(a->parameter->type != V_ASN1_NULL))
			{
			ASN1_TYPE_free(a->parameter);
			a->parameter=ASN1_TYPE_new();
			a->parameter->type=V_ASN1_NULL;
			}
		}
	else
112
#ifndef OPENSSL_NO_DSA
113 114 115 116 117 118 119 120 121
		if (pkey->type == EVP_PKEY_DSA)
		{
		unsigned char *pp;
		DSA *dsa;

		dsa=pkey->pkey.dsa;
		dsa->write_params=0;
		ASN1_TYPE_free(a->parameter);
		i=i2d_DSAparams(dsa,NULL);
122
		p=(unsigned char *)OPENSSL_malloc(i);
123 124 125 126 127 128
		pp=p;
		i2d_DSAparams(dsa,&pp);
		a->parameter=ASN1_TYPE_new();
		a->parameter->type=V_ASN1_SEQUENCE;
		a->parameter->value.sequence=ASN1_STRING_new();
		ASN1_STRING_set(a->parameter->value.sequence,p,i);
129
		OPENSSL_free(p);
130 131 132 133 134 135 136 137
		}
	else
#endif
		{
		X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
		goto err;
		}

138
	if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
139
	if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL) goto err;
140 141
	p=s;
	i2d_PublicKey(pkey,&p);
142
	if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
143 144 145 146
	/* Set number of unused bits to zero */
	pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
	pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;

147
	OPENSSL_free(s);
148

149
#if 0
150 151
	CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
	pk->pkey=pkey;
152
#endif
153 154 155 156 157 158 159 160 161 162 163 164 165

	if (*x != NULL)
		X509_PUBKEY_free(*x);

	*x=pk;
	pk=NULL;

	ok=1;
err:
	if (pk != NULL) X509_PUBKEY_free(pk);
	return(ok);
	}

U
Ulf Möller 已提交
166
EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
167 168 169 170 171
	{
	EVP_PKEY *ret=NULL;
	long j;
	int type;
	unsigned char *p;
R
Richard Levitte 已提交
172
	const unsigned char *cp;
173
#ifndef OPENSSL_NO_DSA
174
	X509_ALGOR *a;
175 176 177 178
#endif

	if (key == NULL) goto err;

B
Ben Laurie 已提交
179 180 181 182 183
	if (key->pkey != NULL)
	    {
	    CRYPTO_add(&key->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
	    return(key->pkey);
	    }
184 185

	if (key->public_key == NULL) goto err;
186 187 188 189 190 191 192 193 194 195 196

	type=OBJ_obj2nid(key->algor->algorithm);
	p=key->public_key->data;
        j=key->public_key->length;
        if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
		{
		X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
		goto err;
		}
	ret->save_parameters=0;

197
#ifndef OPENSSL_NO_DSA
198 199 200
	a=key->algor;
	if (ret->type == EVP_PKEY_DSA)
		{
D
 
Dr. Stephen Henson 已提交
201
		if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
202 203
			{
			ret->pkey.dsa->write_params=0;
R
Richard Levitte 已提交
204
			cp=p=a->parameter->value.sequence->data;
205
			j=a->parameter->value.sequence->length;
R
Richard Levitte 已提交
206
			if (!d2i_DSAparams(&ret->pkey.dsa,&cp,(long)j))
207 208 209 210 211 212
				goto err;
			}
		ret->save_parameters=1;
		}
#endif
	key->pkey=ret;
B
Ben Laurie 已提交
213
	CRYPTO_add(&ret->references,1,CRYPTO_LOCK_EVP_PKEY);
214 215 216 217 218 219 220
	return(ret);
err:
	if (ret != NULL)
		EVP_PKEY_free(ret);
	return(NULL);
	}

221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
 * and encode or decode as X509_PUBKEY
 */

EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp,
	     long length)
{
	X509_PUBKEY *xpk;
	EVP_PKEY *pktmp;
	xpk = d2i_X509_PUBKEY(NULL, pp, length);
	if(!xpk) return NULL;
	pktmp = X509_PUBKEY_get(xpk);
	X509_PUBKEY_free(xpk);
	if(!pktmp) return NULL;
	if(a) {
		EVP_PKEY_free(*a);
		*a = pktmp;
	}
	return pktmp;
}

int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
{
	X509_PUBKEY *xpk=NULL;
	int ret;
	if(!a) return 0;
	if(!X509_PUBKEY_set(&xpk, a)) return 0;
	ret = i2d_X509_PUBKEY(xpk, pp);
	X509_PUBKEY_free(xpk);
	return ret;
}

/* The following are equivalents but which return RSA and DSA
 * keys
 */
256
#ifndef OPENSSL_NO_RSA
257 258 259 260 261 262 263 264 265
RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp,
	     long length)
{
	EVP_PKEY *pkey;
	RSA *key;
	unsigned char *q;
	q = *pp;
	pkey = d2i_PUBKEY(NULL, &q, length);
	if(!pkey) return NULL;
266
	key = EVP_PKEY_get1_RSA(pkey);
267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286
	EVP_PKEY_free(pkey);
	if(!key) return NULL;
	*pp = q;
	if(a) {
		RSA_free(*a);
		*a = key;
	}
	return key;
}

int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
{
	EVP_PKEY *pktmp;
	int ret;
	if(!a) return 0;
	pktmp = EVP_PKEY_new();
	if(!pktmp) {
		ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
		return 0;
	}
287
	EVP_PKEY_set1_RSA(pktmp, a);
288 289 290 291
	ret = i2d_PUBKEY(pktmp, pp);
	EVP_PKEY_free(pktmp);
	return ret;
}
D
Dr. Stephen Henson 已提交
292
#endif
293

294
#ifndef OPENSSL_NO_DSA
295 296 297 298 299 300 301 302 303
DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp,
	     long length)
{
	EVP_PKEY *pkey;
	DSA *key;
	unsigned char *q;
	q = *pp;
	pkey = d2i_PUBKEY(NULL, &q, length);
	if(!pkey) return NULL;
304
	key = EVP_PKEY_get1_DSA(pkey);
305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
	EVP_PKEY_free(pkey);
	if(!key) return NULL;
	*pp = q;
	if(a) {
		DSA_free(*a);
		*a = key;
	}
	return key;
}

int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
{
	EVP_PKEY *pktmp;
	int ret;
	if(!a) return 0;
	pktmp = EVP_PKEY_new();
	if(!pktmp) {
		ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
		return 0;
	}
325
	EVP_PKEY_set1_DSA(pktmp, a);
326 327 328 329
	ret = i2d_PUBKEY(pktmp, pp);
	EVP_PKEY_free(pktmp);
	return ret;
}
D
Dr. Stephen Henson 已提交
330
#endif