155714Skris/* crypto/asn1/x_pubkey.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 61109998Smarkm#include <openssl/asn1t.h> 6255714Skris#include <openssl/x509.h> 63238405Sjkim#include "asn1_locl.h" 64160814Ssimon#ifndef OPENSSL_NO_RSA 65160814Ssimon#include <openssl/rsa.h> 66160814Ssimon#endif 67160814Ssimon#ifndef OPENSSL_NO_DSA 68160814Ssimon#include <openssl/dsa.h> 69160814Ssimon#endif 7055714Skris 71109998Smarkm/* Minor tweak to operation: free up EVP_PKEY */ 72238405Sjkimstatic int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 73238405Sjkim void *exarg) 74160814Ssimon { 75160814Ssimon if (operation == ASN1_OP_FREE_POST) 76160814Ssimon { 77109998Smarkm X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; 78109998Smarkm EVP_PKEY_free(pubkey->pkey); 79160814Ssimon } 80160814Ssimon return 1; 8155714Skris } 8255714Skris 83109998SmarkmASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { 84109998Smarkm ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), 85109998Smarkm ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) 86109998Smarkm} ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) 8755714Skris 88109998SmarkmIMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) 8955714Skris 9055714Skrisint X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) 9155714Skris { 92160814Ssimon X509_PUBKEY *pk=NULL; 9355714Skris 9455714Skris if (x == NULL) return(0); 9555714Skris 96238405Sjkim if ((pk=X509_PUBKEY_new()) == NULL) goto error; 9755714Skris 98238405Sjkim if (pkey->ameth) 9955714Skris { 100238405Sjkim if (pkey->ameth->pub_encode) 10155714Skris { 102238405Sjkim if (!pkey->ameth->pub_encode(pk, pkey)) 103160814Ssimon { 104238405Sjkim X509err(X509_F_X509_PUBKEY_SET, 105238405Sjkim X509_R_PUBLIC_KEY_ENCODE_ERROR); 106238405Sjkim goto error; 107160814Ssimon } 10855714Skris } 109238405Sjkim else 110160814Ssimon { 111238405Sjkim X509err(X509_F_X509_PUBKEY_SET, 112238405Sjkim X509_R_METHOD_NOT_SUPPORTED); 113238405Sjkim goto error; 114160814Ssimon } 11555714Skris } 116238405Sjkim else 11755714Skris { 11855714Skris X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM); 119238405Sjkim goto error; 12055714Skris } 12155714Skris 12255714Skris if (*x != NULL) 12355714Skris X509_PUBKEY_free(*x); 12455714Skris 12555714Skris *x=pk; 12655714Skris 127160814Ssimon return 1; 128238405Sjkimerror: 12955714Skris if (pk != NULL) X509_PUBKEY_free(pk); 130160814Ssimon return 0; 13155714Skris } 13255714Skris 13355714SkrisEVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) 13455714Skris { 13555714Skris EVP_PKEY *ret=NULL; 13655714Skris 137238405Sjkim if (key == NULL) goto error; 13855714Skris 13955714Skris if (key->pkey != NULL) 140160814Ssimon { 141160814Ssimon CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); 142238405Sjkim return key->pkey; 143160814Ssimon } 14455714Skris 145238405Sjkim if (key->public_key == NULL) goto error; 14655714Skris 147160814Ssimon if ((ret = EVP_PKEY_new()) == NULL) 14855714Skris { 149160814Ssimon X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); 150238405Sjkim goto error; 15155714Skris } 15255714Skris 153238405Sjkim if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) 15455714Skris { 155238405Sjkim X509err(X509_F_X509_PUBKEY_GET,X509_R_UNSUPPORTED_ALGORITHM); 156238405Sjkim goto error; 15755714Skris } 158238405Sjkim 159238405Sjkim if (ret->ameth->pub_decode) 160160814Ssimon { 161238405Sjkim if (!ret->ameth->pub_decode(ret, key)) 162160814Ssimon { 163238405Sjkim X509err(X509_F_X509_PUBKEY_GET, 164238405Sjkim X509_R_PUBLIC_KEY_DECODE_ERROR); 165238405Sjkim goto error; 166160814Ssimon } 167160814Ssimon } 168238405Sjkim else 169160814Ssimon { 170238405Sjkim X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED); 171238405Sjkim goto error; 172160814Ssimon } 173160814Ssimon 174237657Sjkim /* Check to see if another thread set key->pkey first */ 175237657Sjkim CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); 176237657Sjkim if (key->pkey) 177237657Sjkim { 178246772Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 179237657Sjkim EVP_PKEY_free(ret); 180237657Sjkim ret = key->pkey; 181237657Sjkim } 182237657Sjkim else 183246772Sjkim { 184237657Sjkim key->pkey = ret; 185246772Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 186246772Sjkim } 187160814Ssimon CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); 188238405Sjkim 189238405Sjkim return ret; 190238405Sjkim 191238405Sjkim error: 19255714Skris if (ret != NULL) 19355714Skris EVP_PKEY_free(ret); 19455714Skris return(NULL); 19555714Skris } 19655714Skris 19759191Skris/* Now two pseudo ASN1 routines that take an EVP_PKEY structure 19859191Skris * and encode or decode as X509_PUBKEY 19959191Skris */ 20059191Skris 201160814SsimonEVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, 20259191Skris long length) 203160814Ssimon { 20459191Skris X509_PUBKEY *xpk; 20559191Skris EVP_PKEY *pktmp; 20659191Skris xpk = d2i_X509_PUBKEY(NULL, pp, length); 20759191Skris if(!xpk) return NULL; 20859191Skris pktmp = X509_PUBKEY_get(xpk); 20959191Skris X509_PUBKEY_free(xpk); 21059191Skris if(!pktmp) return NULL; 211160814Ssimon if(a) 212160814Ssimon { 21359191Skris EVP_PKEY_free(*a); 21459191Skris *a = pktmp; 215160814Ssimon } 216160814Ssimon return pktmp; 21759191Skris } 21859191Skris 21959191Skrisint i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) 220160814Ssimon { 22159191Skris X509_PUBKEY *xpk=NULL; 22259191Skris int ret; 22359191Skris if(!a) return 0; 22459191Skris if(!X509_PUBKEY_set(&xpk, a)) return 0; 22559191Skris ret = i2d_X509_PUBKEY(xpk, pp); 22659191Skris X509_PUBKEY_free(xpk); 22759191Skris return ret; 228160814Ssimon } 22959191Skris 23059191Skris/* The following are equivalents but which return RSA and DSA 23159191Skris * keys 23259191Skris */ 233109998Smarkm#ifndef OPENSSL_NO_RSA 234160814SsimonRSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, 23559191Skris long length) 236160814Ssimon { 23759191Skris EVP_PKEY *pkey; 23859191Skris RSA *key; 239160814Ssimon const unsigned char *q; 24059191Skris q = *pp; 24159191Skris pkey = d2i_PUBKEY(NULL, &q, length); 242160814Ssimon if (!pkey) return NULL; 24359191Skris key = EVP_PKEY_get1_RSA(pkey); 24459191Skris EVP_PKEY_free(pkey); 245160814Ssimon if (!key) return NULL; 24659191Skris *pp = q; 247160814Ssimon if (a) 248160814Ssimon { 24959191Skris RSA_free(*a); 25059191Skris *a = key; 251160814Ssimon } 252160814Ssimon return key; 25359191Skris } 25459191Skris 25559191Skrisint i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) 256160814Ssimon { 25759191Skris EVP_PKEY *pktmp; 25859191Skris int ret; 259160814Ssimon if (!a) return 0; 26059191Skris pktmp = EVP_PKEY_new(); 261160814Ssimon if (!pktmp) 262160814Ssimon { 26359191Skris ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); 26459191Skris return 0; 265160814Ssimon } 26659191Skris EVP_PKEY_set1_RSA(pktmp, a); 26759191Skris ret = i2d_PUBKEY(pktmp, pp); 26859191Skris EVP_PKEY_free(pktmp); 26959191Skris return ret; 270160814Ssimon } 27159191Skris#endif 27259191Skris 273109998Smarkm#ifndef OPENSSL_NO_DSA 274160814SsimonDSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, 27559191Skris long length) 276160814Ssimon { 27759191Skris EVP_PKEY *pkey; 27859191Skris DSA *key; 279160814Ssimon const unsigned char *q; 28059191Skris q = *pp; 28159191Skris pkey = d2i_PUBKEY(NULL, &q, length); 282160814Ssimon if (!pkey) return NULL; 28359191Skris key = EVP_PKEY_get1_DSA(pkey); 28459191Skris EVP_PKEY_free(pkey); 285160814Ssimon if (!key) return NULL; 28659191Skris *pp = q; 287160814Ssimon if (a) 288160814Ssimon { 28959191Skris DSA_free(*a); 29059191Skris *a = key; 291160814Ssimon } 292160814Ssimon return key; 29359191Skris } 29459191Skris 29559191Skrisint i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) 296160814Ssimon { 29759191Skris EVP_PKEY *pktmp; 29859191Skris int ret; 29959191Skris if(!a) return 0; 30059191Skris pktmp = EVP_PKEY_new(); 301160814Ssimon if(!pktmp) 302160814Ssimon { 30359191Skris ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); 30459191Skris return 0; 305160814Ssimon } 30659191Skris EVP_PKEY_set1_DSA(pktmp, a); 30759191Skris ret = i2d_PUBKEY(pktmp, pp); 30859191Skris EVP_PKEY_free(pktmp); 30959191Skris return ret; 310160814Ssimon } 31159191Skris#endif 312160814Ssimon 313160814Ssimon#ifndef OPENSSL_NO_EC 314160814SsimonEC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) 315160814Ssimon { 316160814Ssimon EVP_PKEY *pkey; 317160814Ssimon EC_KEY *key; 318160814Ssimon const unsigned char *q; 319160814Ssimon q = *pp; 320160814Ssimon pkey = d2i_PUBKEY(NULL, &q, length); 321160814Ssimon if (!pkey) return(NULL); 322160814Ssimon key = EVP_PKEY_get1_EC_KEY(pkey); 323160814Ssimon EVP_PKEY_free(pkey); 324160814Ssimon if (!key) return(NULL); 325160814Ssimon *pp = q; 326160814Ssimon if (a) 327160814Ssimon { 328160814Ssimon EC_KEY_free(*a); 329160814Ssimon *a = key; 330160814Ssimon } 331160814Ssimon return(key); 332160814Ssimon } 333160814Ssimon 334160814Ssimonint i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) 335160814Ssimon { 336160814Ssimon EVP_PKEY *pktmp; 337160814Ssimon int ret; 338160814Ssimon if (!a) return(0); 339160814Ssimon if ((pktmp = EVP_PKEY_new()) == NULL) 340160814Ssimon { 341160814Ssimon ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); 342160814Ssimon return(0); 343160814Ssimon } 344160814Ssimon EVP_PKEY_set1_EC_KEY(pktmp, a); 345160814Ssimon ret = i2d_PUBKEY(pktmp, pp); 346160814Ssimon EVP_PKEY_free(pktmp); 347160814Ssimon return(ret); 348160814Ssimon } 349160814Ssimon#endif 350238405Sjkim 351238405Sjkimint X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, 352238405Sjkim int ptype, void *pval, 353238405Sjkim unsigned char *penc, int penclen) 354238405Sjkim { 355238405Sjkim if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) 356238405Sjkim return 0; 357238405Sjkim if (penc) 358238405Sjkim { 359238405Sjkim if (pub->public_key->data) 360238405Sjkim OPENSSL_free(pub->public_key->data); 361238405Sjkim pub->public_key->data = penc; 362238405Sjkim pub->public_key->length = penclen; 363238405Sjkim /* Set number of unused bits to zero */ 364238405Sjkim pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); 365238405Sjkim pub->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT; 366238405Sjkim } 367238405Sjkim return 1; 368238405Sjkim } 369238405Sjkim 370238405Sjkimint X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, 371238405Sjkim const unsigned char **pk, int *ppklen, 372238405Sjkim X509_ALGOR **pa, 373238405Sjkim X509_PUBKEY *pub) 374238405Sjkim { 375238405Sjkim if (ppkalg) 376238405Sjkim *ppkalg = pub->algor->algorithm; 377238405Sjkim if (pk) 378238405Sjkim { 379238405Sjkim *pk = pub->public_key->data; 380238405Sjkim *ppklen = pub->public_key->length; 381238405Sjkim } 382238405Sjkim if (pa) 383238405Sjkim *pa = pub->algor; 384238405Sjkim return 1; 385238405Sjkim } 386