1 /* crypto/evp/p_lib.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #include "objects.h" 62 #include "evp.h" 63 #include "asn1_mac.h" 64 #include "x509.h" 65 66 /* EVPerr(EVP_F_D2I_PKEY,EVP_R_UNSUPPORTED_CIPHER); */ 67 /* EVPerr(EVP_F_D2I_PKEY,EVP_R_IV_TOO_LARGE); */ 68 69 #ifndef NOPROTO 70 static void EVP_PKEY_free_it(EVP_PKEY *x); 71 #else 72 static void EVP_PKEY_free_it(); 73 #endif 74 75 int EVP_PKEY_bits(pkey) 76 EVP_PKEY *pkey; 77 { 78 #ifndef NO_RSA 79 if (pkey->type == EVP_PKEY_RSA) 80 return(BN_num_bits(pkey->pkey.rsa->n)); 81 else 82 #endif 83 #ifndef NO_DSA 84 if (pkey->type == EVP_PKEY_DSA) 85 return(BN_num_bits(pkey->pkey.dsa->p)); 86 #endif 87 return(0); 88 } 89 90 int EVP_PKEY_size(pkey) 91 EVP_PKEY *pkey; 92 { 93 #ifndef NO_RSA 94 if (pkey->type == EVP_PKEY_RSA) 95 return(RSA_size(pkey->pkey.rsa)); 96 else 97 #endif 98 #ifndef NO_DSA 99 if (pkey->type == EVP_PKEY_DSA) 100 return(DSA_size(pkey->pkey.dsa)); 101 #endif 102 return(0); 103 } 104 105 int EVP_PKEY_save_parameters(pkey,mode) 106 EVP_PKEY *pkey; 107 int mode; 108 { 109 #ifndef NO_DSA 110 if (pkey->type == EVP_PKEY_DSA) 111 { 112 int ret=pkey->save_parameters=mode; 113 114 if (mode >= 0) 115 pkey->save_parameters=mode; 116 return(ret); 117 } 118 #endif 119 return(0); 120 } 121 122 int EVP_PKEY_copy_parameters(to,from) 123 EVP_PKEY *to,*from; 124 { 125 if (to->type != from->type) 126 { 127 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES); 128 goto err; 129 } 130 131 if (EVP_PKEY_missing_parameters(from)) 132 { 133 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARMATERS); 134 goto err; 135 } 136 #ifndef NO_DSA 137 if (to->type == EVP_PKEY_DSA) 138 { 139 BIGNUM *a; 140 141 if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err; 142 if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p); 143 to->pkey.dsa->p=a; 144 145 if ((a=BN_dup(from->pkey.dsa->q)) == NULL) goto err; 146 if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q); 147 to->pkey.dsa->q=a; 148 149 if ((a=BN_dup(from->pkey.dsa->g)) == NULL) goto err; 150 if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g); 151 to->pkey.dsa->g=a; 152 } 153 #endif 154 return(1); 155 err: 156 return(0); 157 } 158 159 int EVP_PKEY_missing_parameters(pkey) 160 EVP_PKEY *pkey; 161 { 162 #ifndef NO_DSA 163 if (pkey->type == EVP_PKEY_DSA) 164 { 165 DSA *dsa; 166 167 dsa=pkey->pkey.dsa; 168 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL)) 169 return(1); 170 } 171 #endif 172 return(0); 173 } 174 175 int EVP_PKEY_cmp_parameters(a,b) 176 EVP_PKEY *a,*b; 177 { 178 #ifndef NO_DSA 179 if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA)) 180 { 181 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) || 182 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) || 183 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g)) 184 return(0); 185 else 186 return(1); 187 } 188 #endif 189 return(-1); 190 } 191 192 EVP_PKEY *EVP_PKEY_new() 193 { 194 EVP_PKEY *ret; 195 196 ret=(EVP_PKEY *)Malloc(sizeof(EVP_PKEY)); 197 if (ret == NULL) 198 { 199 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE); 200 return(NULL); 201 } 202 ret->type=EVP_PKEY_NONE; 203 ret->references=1; 204 ret->pkey.ptr=NULL; 205 ret->attributes=NULL; 206 ret->save_parameters=1; 207 return(ret); 208 } 209 210 int EVP_PKEY_assign(pkey,type,key) 211 EVP_PKEY *pkey; 212 int type; 213 char *key; 214 { 215 if (pkey == NULL) return(0); 216 if (pkey->pkey.ptr != NULL) 217 EVP_PKEY_free_it(pkey); 218 pkey->type=EVP_PKEY_type(type); 219 pkey->save_type=type; 220 pkey->pkey.ptr=key; 221 return(1); 222 } 223 224 int EVP_PKEY_type(type) 225 int type; 226 { 227 switch (type) 228 { 229 case EVP_PKEY_RSA: 230 case EVP_PKEY_RSA2: 231 return(EVP_PKEY_RSA); 232 case EVP_PKEY_DSA: 233 case EVP_PKEY_DSA1: 234 case EVP_PKEY_DSA2: 235 case EVP_PKEY_DSA3: 236 case EVP_PKEY_DSA4: 237 return(EVP_PKEY_DSA); 238 case EVP_PKEY_DH: 239 return(EVP_PKEY_DH); 240 default: 241 return(NID_undef); 242 } 243 } 244 245 void EVP_PKEY_free(x) 246 EVP_PKEY *x; 247 { 248 int i; 249 250 if (x == NULL) return; 251 252 i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY); 253 #ifdef REF_PRINT 254 REF_PRINT("EVP_PKEY",x); 255 #endif 256 if (i > 0) return; 257 #ifdef REF_CHECK 258 if (i < 0) 259 { 260 fprintf(stderr,"EVP_PKEY_free, bad reference count\n"); 261 abort(); 262 } 263 #endif 264 EVP_PKEY_free_it(x); 265 Free((char *)x); 266 } 267 268 static void EVP_PKEY_free_it(x) 269 EVP_PKEY *x; 270 { 271 switch (x->type) 272 { 273 #ifndef NO_RSA 274 case EVP_PKEY_RSA: 275 case EVP_PKEY_RSA2: 276 RSA_free(x->pkey.rsa); 277 break; 278 #endif 279 #ifndef NO_DSA 280 case EVP_PKEY_DSA: 281 case EVP_PKEY_DSA2: 282 case EVP_PKEY_DSA3: 283 case EVP_PKEY_DSA4: 284 DSA_free(x->pkey.dsa); 285 break; 286 #endif 287 #ifndef NO_DH 288 case EVP_PKEY_DH: 289 DH_free(x->pkey.dh); 290 break; 291 #endif 292 } 293 } 294 295