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. 8280304Sjkim * 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). 15280304Sjkim * 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. 22280304Sjkim * 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 :-). 37280304Sjkim * 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)" 40280304Sjkim * 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. 52280304Sjkim * 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 65280304Sjkim# include <openssl/rsa.h> 66160814Ssimon#endif 67160814Ssimon#ifndef OPENSSL_NO_DSA 68280304Sjkim# 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, 73280304Sjkim void *exarg) 74280304Sjkim{ 75280304Sjkim if (operation == ASN1_OP_FREE_POST) { 76280304Sjkim X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; 77280304Sjkim EVP_PKEY_free(pubkey->pkey); 78280304Sjkim } 79280304Sjkim return 1; 80280304Sjkim} 8155714Skris 82109998SmarkmASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { 83280304Sjkim ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), 84280304Sjkim ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) 85109998Smarkm} ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) 8655714Skris 87109998SmarkmIMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) 8855714Skris 8955714Skrisint X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) 90280304Sjkim{ 91280304Sjkim X509_PUBKEY *pk = NULL; 9255714Skris 93280304Sjkim if (x == NULL) 94280304Sjkim return (0); 9555714Skris 96280304Sjkim if ((pk = X509_PUBKEY_new()) == NULL) 97280304Sjkim goto error; 9855714Skris 99280304Sjkim if (pkey->ameth) { 100280304Sjkim if (pkey->ameth->pub_encode) { 101280304Sjkim if (!pkey->ameth->pub_encode(pk, pkey)) { 102280304Sjkim X509err(X509_F_X509_PUBKEY_SET, 103280304Sjkim X509_R_PUBLIC_KEY_ENCODE_ERROR); 104280304Sjkim goto error; 105280304Sjkim } 106280304Sjkim } else { 107280304Sjkim X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); 108280304Sjkim goto error; 109280304Sjkim } 110280304Sjkim } else { 111280304Sjkim X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); 112280304Sjkim goto error; 113280304Sjkim } 11455714Skris 115280304Sjkim if (*x != NULL) 116280304Sjkim X509_PUBKEY_free(*x); 11755714Skris 118280304Sjkim *x = pk; 11955714Skris 120280304Sjkim return 1; 121280304Sjkim error: 122280304Sjkim if (pk != NULL) 123280304Sjkim X509_PUBKEY_free(pk); 124280304Sjkim return 0; 125280304Sjkim} 12655714Skris 12755714SkrisEVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) 128280304Sjkim{ 129280304Sjkim EVP_PKEY *ret = NULL; 13055714Skris 131280304Sjkim if (key == NULL) 132280304Sjkim goto error; 13355714Skris 134280304Sjkim if (key->pkey != NULL) { 135280304Sjkim CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); 136280304Sjkim return key->pkey; 137280304Sjkim } 13855714Skris 139280304Sjkim if (key->public_key == NULL) 140280304Sjkim goto error; 14155714Skris 142280304Sjkim if ((ret = EVP_PKEY_new()) == NULL) { 143280304Sjkim X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); 144280304Sjkim goto error; 145280304Sjkim } 14655714Skris 147280304Sjkim if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) { 148280304Sjkim X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM); 149280304Sjkim goto error; 150280304Sjkim } 151238405Sjkim 152280304Sjkim if (ret->ameth->pub_decode) { 153280304Sjkim if (!ret->ameth->pub_decode(ret, key)) { 154280304Sjkim X509err(X509_F_X509_PUBKEY_GET, X509_R_PUBLIC_KEY_DECODE_ERROR); 155280304Sjkim goto error; 156280304Sjkim } 157280304Sjkim } else { 158280304Sjkim X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED); 159280304Sjkim goto error; 160280304Sjkim } 161160814Ssimon 162280304Sjkim /* Check to see if another thread set key->pkey first */ 163280304Sjkim CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); 164280304Sjkim if (key->pkey) { 165280304Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 166280304Sjkim EVP_PKEY_free(ret); 167280304Sjkim ret = key->pkey; 168280304Sjkim } else { 169280304Sjkim key->pkey = ret; 170280304Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 171280304Sjkim } 172280304Sjkim CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); 173238405Sjkim 174280304Sjkim return ret; 175238405Sjkim 176280304Sjkim error: 177280304Sjkim if (ret != NULL) 178280304Sjkim EVP_PKEY_free(ret); 179280304Sjkim return (NULL); 180280304Sjkim} 18155714Skris 182280304Sjkim/* 183280304Sjkim * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or 184280304Sjkim * decode as X509_PUBKEY 18559191Skris */ 18659191Skris 187280304SjkimEVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) 188280304Sjkim{ 189280304Sjkim X509_PUBKEY *xpk; 190280304Sjkim EVP_PKEY *pktmp; 191291721Sjkim const unsigned char *q; 192291721Sjkim q = *pp; 193291721Sjkim xpk = d2i_X509_PUBKEY(NULL, &q, length); 194280304Sjkim if (!xpk) 195280304Sjkim return NULL; 196280304Sjkim pktmp = X509_PUBKEY_get(xpk); 197280304Sjkim X509_PUBKEY_free(xpk); 198280304Sjkim if (!pktmp) 199280304Sjkim return NULL; 200291721Sjkim *pp = q; 201280304Sjkim if (a) { 202280304Sjkim EVP_PKEY_free(*a); 203280304Sjkim *a = pktmp; 204280304Sjkim } 205280304Sjkim return pktmp; 206280304Sjkim} 20759191Skris 20859191Skrisint i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) 209280304Sjkim{ 210280304Sjkim X509_PUBKEY *xpk = NULL; 211280304Sjkim int ret; 212280304Sjkim if (!a) 213280304Sjkim return 0; 214280304Sjkim if (!X509_PUBKEY_set(&xpk, a)) 215280304Sjkim return 0; 216280304Sjkim ret = i2d_X509_PUBKEY(xpk, pp); 217280304Sjkim X509_PUBKEY_free(xpk); 218280304Sjkim return ret; 219280304Sjkim} 22059191Skris 221280304Sjkim/* 222280304Sjkim * The following are equivalents but which return RSA and DSA keys 22359191Skris */ 224109998Smarkm#ifndef OPENSSL_NO_RSA 225280304SjkimRSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) 226280304Sjkim{ 227280304Sjkim EVP_PKEY *pkey; 228280304Sjkim RSA *key; 229280304Sjkim const unsigned char *q; 230280304Sjkim q = *pp; 231280304Sjkim pkey = d2i_PUBKEY(NULL, &q, length); 232280304Sjkim if (!pkey) 233280304Sjkim return NULL; 234280304Sjkim key = EVP_PKEY_get1_RSA(pkey); 235280304Sjkim EVP_PKEY_free(pkey); 236280304Sjkim if (!key) 237280304Sjkim return NULL; 238280304Sjkim *pp = q; 239280304Sjkim if (a) { 240280304Sjkim RSA_free(*a); 241280304Sjkim *a = key; 242280304Sjkim } 243280304Sjkim return key; 244280304Sjkim} 24559191Skris 24659191Skrisint i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) 247280304Sjkim{ 248280304Sjkim EVP_PKEY *pktmp; 249280304Sjkim int ret; 250280304Sjkim if (!a) 251280304Sjkim return 0; 252280304Sjkim pktmp = EVP_PKEY_new(); 253280304Sjkim if (!pktmp) { 254280304Sjkim ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); 255280304Sjkim return 0; 256280304Sjkim } 257280304Sjkim EVP_PKEY_set1_RSA(pktmp, a); 258280304Sjkim ret = i2d_PUBKEY(pktmp, pp); 259280304Sjkim EVP_PKEY_free(pktmp); 260280304Sjkim return ret; 261280304Sjkim} 26259191Skris#endif 26359191Skris 264109998Smarkm#ifndef OPENSSL_NO_DSA 265280304SjkimDSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) 266280304Sjkim{ 267280304Sjkim EVP_PKEY *pkey; 268280304Sjkim DSA *key; 269280304Sjkim const unsigned char *q; 270280304Sjkim q = *pp; 271280304Sjkim pkey = d2i_PUBKEY(NULL, &q, length); 272280304Sjkim if (!pkey) 273280304Sjkim return NULL; 274280304Sjkim key = EVP_PKEY_get1_DSA(pkey); 275280304Sjkim EVP_PKEY_free(pkey); 276280304Sjkim if (!key) 277280304Sjkim return NULL; 278280304Sjkim *pp = q; 279280304Sjkim if (a) { 280280304Sjkim DSA_free(*a); 281280304Sjkim *a = key; 282280304Sjkim } 283280304Sjkim return key; 284280304Sjkim} 28559191Skris 28659191Skrisint i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) 287280304Sjkim{ 288280304Sjkim EVP_PKEY *pktmp; 289280304Sjkim int ret; 290280304Sjkim if (!a) 291280304Sjkim return 0; 292280304Sjkim pktmp = EVP_PKEY_new(); 293280304Sjkim if (!pktmp) { 294280304Sjkim ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); 295280304Sjkim return 0; 296280304Sjkim } 297280304Sjkim EVP_PKEY_set1_DSA(pktmp, a); 298280304Sjkim ret = i2d_PUBKEY(pktmp, pp); 299280304Sjkim EVP_PKEY_free(pktmp); 300280304Sjkim return ret; 301280304Sjkim} 30259191Skris#endif 303160814Ssimon 304160814Ssimon#ifndef OPENSSL_NO_EC 305160814SsimonEC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) 306280304Sjkim{ 307280304Sjkim EVP_PKEY *pkey; 308280304Sjkim EC_KEY *key; 309280304Sjkim const unsigned char *q; 310280304Sjkim q = *pp; 311280304Sjkim pkey = d2i_PUBKEY(NULL, &q, length); 312280304Sjkim if (!pkey) 313280304Sjkim return (NULL); 314280304Sjkim key = EVP_PKEY_get1_EC_KEY(pkey); 315280304Sjkim EVP_PKEY_free(pkey); 316280304Sjkim if (!key) 317280304Sjkim return (NULL); 318280304Sjkim *pp = q; 319280304Sjkim if (a) { 320280304Sjkim EC_KEY_free(*a); 321280304Sjkim *a = key; 322280304Sjkim } 323280304Sjkim return (key); 324280304Sjkim} 325160814Ssimon 326160814Ssimonint i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) 327280304Sjkim{ 328280304Sjkim EVP_PKEY *pktmp; 329280304Sjkim int ret; 330280304Sjkim if (!a) 331280304Sjkim return (0); 332280304Sjkim if ((pktmp = EVP_PKEY_new()) == NULL) { 333280304Sjkim ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); 334280304Sjkim return (0); 335280304Sjkim } 336280304Sjkim EVP_PKEY_set1_EC_KEY(pktmp, a); 337280304Sjkim ret = i2d_PUBKEY(pktmp, pp); 338280304Sjkim EVP_PKEY_free(pktmp); 339280304Sjkim return (ret); 340280304Sjkim} 341160814Ssimon#endif 342238405Sjkim 343238405Sjkimint X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, 344280304Sjkim int ptype, void *pval, 345280304Sjkim unsigned char *penc, int penclen) 346280304Sjkim{ 347280304Sjkim if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) 348280304Sjkim return 0; 349280304Sjkim if (penc) { 350280304Sjkim if (pub->public_key->data) 351280304Sjkim OPENSSL_free(pub->public_key->data); 352280304Sjkim pub->public_key->data = penc; 353280304Sjkim pub->public_key->length = penclen; 354280304Sjkim /* Set number of unused bits to zero */ 355280304Sjkim pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 356280304Sjkim pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; 357280304Sjkim } 358280304Sjkim return 1; 359280304Sjkim} 360238405Sjkim 361238405Sjkimint X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, 362280304Sjkim const unsigned char **pk, int *ppklen, 363280304Sjkim X509_ALGOR **pa, X509_PUBKEY *pub) 364280304Sjkim{ 365280304Sjkim if (ppkalg) 366280304Sjkim *ppkalg = pub->algor->algorithm; 367280304Sjkim if (pk) { 368280304Sjkim *pk = pub->public_key->data; 369280304Sjkim *ppklen = pub->public_key->length; 370280304Sjkim } 371280304Sjkim if (pa) 372280304Sjkim *pa = pub->algor; 373280304Sjkim return 1; 374280304Sjkim} 375