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| 1 /* crypto/pem/pem_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 <ctype.h> | |
| 61 #include "cryptlib.h" | |
| 62 #include <openssl/buffer.h> | |
| 63 #include <openssl/objects.h> | |
| 64 #include <openssl/evp.h> | |
| 65 #include <openssl/rand.h> | |
| 66 #include <openssl/x509.h> | |
| 67 #include <openssl/pem.h> | |
| 68 #include <openssl/pkcs12.h> | |
| 69 #include "asn1_locl.h" | |
| 70 #ifndef OPENSSL_NO_DES | |
| 71 #include <openssl/des.h> | |
| 72 #endif | |
| 73 #ifndef OPENSSL_NO_ENGINE | |
| 74 #include <openssl/engine.h> | |
| 75 #endif | |
| 76 | |
| 77 const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT; | |
| 78 | |
| 79 #define MIN_LENGTH 4 | |
| 80 | |
| 81 static int load_iv(char **fromp,unsigned char *to, int num); | |
| 82 static int check_pem(const char *nm, const char *name); | |
| 83 int pem_check_suffix(const char *pem_str, const char *suffix); | |
| 84 | |
| 85 int PEM_def_callback(char *buf, int num, int w, void *key) | |
| 86 { | |
| 87 #ifdef OPENSSL_NO_FP_API | |
| 88 /* We should not ever call the default callback routine from | |
| 89 * windows. */ | |
| 90 PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
| 91 return(-1); | |
| 92 #else | |
| 93 int i,j; | |
| 94 const char *prompt; | |
| 95 if(key) { | |
| 96 i=strlen(key); | |
| 97 i=(i > num)?num:i; | |
| 98 memcpy(buf,key,i); | |
| 99 return(i); | |
| 100 } | |
| 101 | |
| 102 prompt=EVP_get_pw_prompt(); | |
| 103 if (prompt == NULL) | |
| 104 prompt="Enter PEM pass phrase:"; | |
| 105 | |
| 106 for (;;) | |
| 107 { | |
| 108 i=EVP_read_pw_string_min(buf,MIN_LENGTH,num,prompt,w); | |
| 109 if (i != 0) | |
| 110 { | |
| 111 PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PAS
SWORD); | |
| 112 memset(buf,0,(unsigned int)num); | |
| 113 return(-1); | |
| 114 } | |
| 115 j=strlen(buf); | |
| 116 if (j < MIN_LENGTH) | |
| 117 { | |
| 118 fprintf(stderr,"phrase is too short, needs to be at leas
t %d chars\n",MIN_LENGTH); | |
| 119 } | |
| 120 else | |
| 121 break; | |
| 122 } | |
| 123 return(j); | |
| 124 #endif | |
| 125 } | |
| 126 | |
| 127 void PEM_proc_type(char *buf, int type) | |
| 128 { | |
| 129 const char *str; | |
| 130 | |
| 131 if (type == PEM_TYPE_ENCRYPTED) | |
| 132 str="ENCRYPTED"; | |
| 133 else if (type == PEM_TYPE_MIC_CLEAR) | |
| 134 str="MIC-CLEAR"; | |
| 135 else if (type == PEM_TYPE_MIC_ONLY) | |
| 136 str="MIC-ONLY"; | |
| 137 else | |
| 138 str="BAD-TYPE"; | |
| 139 | |
| 140 BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE); | |
| 141 BUF_strlcat(buf,str,PEM_BUFSIZE); | |
| 142 BUF_strlcat(buf,"\n",PEM_BUFSIZE); | |
| 143 } | |
| 144 | |
| 145 void PEM_dek_info(char *buf, const char *type, int len, char *str) | |
| 146 { | |
| 147 static const unsigned char map[17]="0123456789ABCDEF"; | |
| 148 long i; | |
| 149 int j; | |
| 150 | |
| 151 BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE); | |
| 152 BUF_strlcat(buf,type,PEM_BUFSIZE); | |
| 153 BUF_strlcat(buf,",",PEM_BUFSIZE); | |
| 154 j=strlen(buf); | |
| 155 if (j + (len * 2) + 1 > PEM_BUFSIZE) | |
| 156 return; | |
| 157 for (i=0; i<len; i++) | |
| 158 { | |
| 159 buf[j+i*2] =map[(str[i]>>4)&0x0f]; | |
| 160 buf[j+i*2+1]=map[(str[i] )&0x0f]; | |
| 161 } | |
| 162 buf[j+i*2]='\n'; | |
| 163 buf[j+i*2+1]='\0'; | |
| 164 } | |
| 165 | |
| 166 #ifndef OPENSSL_NO_FP_API | |
| 167 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, | |
| 168 pem_password_cb *cb, void *u) | |
| 169 { | |
| 170 BIO *b; | |
| 171 void *ret; | |
| 172 | |
| 173 if ((b=BIO_new(BIO_s_file())) == NULL) | |
| 174 { | |
| 175 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB); | |
| 176 return(0); | |
| 177 } | |
| 178 BIO_set_fp(b,fp,BIO_NOCLOSE); | |
| 179 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u); | |
| 180 BIO_free(b); | |
| 181 return(ret); | |
| 182 } | |
| 183 #endif | |
| 184 | |
| 185 static int check_pem(const char *nm, const char *name) | |
| 186 { | |
| 187 /* Normal matching nm and name */ | |
| 188 if (!strcmp(nm,name)) return 1; | |
| 189 | |
| 190 /* Make PEM_STRING_EVP_PKEY match any private key */ | |
| 191 | |
| 192 if(!strcmp(name,PEM_STRING_EVP_PKEY)) | |
| 193 { | |
| 194 int slen; | |
| 195 const EVP_PKEY_ASN1_METHOD *ameth; | |
| 196 if(!strcmp(nm,PEM_STRING_PKCS8)) | |
| 197 return 1; | |
| 198 if(!strcmp(nm,PEM_STRING_PKCS8INF)) | |
| 199 return 1; | |
| 200 slen = pem_check_suffix(nm, "PRIVATE KEY"); | |
| 201 if (slen > 0) | |
| 202 { | |
| 203 /* NB: ENGINE implementations wont contain | |
| 204 * a deprecated old private key decode function | |
| 205 * so don't look for them. | |
| 206 */ | |
| 207 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); | |
| 208 if (ameth && ameth->old_priv_decode) | |
| 209 return 1; | |
| 210 } | |
| 211 return 0; | |
| 212 } | |
| 213 | |
| 214 if(!strcmp(name,PEM_STRING_PARAMETERS)) | |
| 215 { | |
| 216 int slen; | |
| 217 const EVP_PKEY_ASN1_METHOD *ameth; | |
| 218 slen = pem_check_suffix(nm, "PARAMETERS"); | |
| 219 if (slen > 0) | |
| 220 { | |
| 221 ENGINE *e; | |
| 222 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); | |
| 223 if (ameth) | |
| 224 { | |
| 225 int r; | |
| 226 if (ameth->param_decode) | |
| 227 r = 1; | |
| 228 else | |
| 229 r = 0; | |
| 230 #ifndef OPENSSL_NO_ENGINE | |
| 231 if (e) | |
| 232 ENGINE_finish(e); | |
| 233 #endif | |
| 234 return r; | |
| 235 } | |
| 236 } | |
| 237 return 0; | |
| 238 } | |
| 239 | |
| 240 /* Permit older strings */ | |
| 241 | |
| 242 if(!strcmp(nm,PEM_STRING_X509_OLD) && | |
| 243 !strcmp(name,PEM_STRING_X509)) return 1; | |
| 244 | |
| 245 if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) && | |
| 246 !strcmp(name,PEM_STRING_X509_REQ)) return 1; | |
| 247 | |
| 248 /* Allow normal certs to be read as trusted certs */ | |
| 249 if(!strcmp(nm,PEM_STRING_X509) && | |
| 250 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; | |
| 251 | |
| 252 if(!strcmp(nm,PEM_STRING_X509_OLD) && | |
| 253 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1; | |
| 254 | |
| 255 /* Some CAs use PKCS#7 with CERTIFICATE headers */ | |
| 256 if(!strcmp(nm, PEM_STRING_X509) && | |
| 257 !strcmp(name, PEM_STRING_PKCS7)) return 1; | |
| 258 | |
| 259 if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) && | |
| 260 !strcmp(name, PEM_STRING_PKCS7)) return 1; | |
| 261 | |
| 262 #ifndef OPENSSL_NO_CMS | |
| 263 if(!strcmp(nm, PEM_STRING_X509) && | |
| 264 !strcmp(name, PEM_STRING_CMS)) return 1; | |
| 265 /* Allow CMS to be read from PKCS#7 headers */ | |
| 266 if(!strcmp(nm, PEM_STRING_PKCS7) && | |
| 267 !strcmp(name, PEM_STRING_CMS)) return 1; | |
| 268 #endif | |
| 269 | |
| 270 return 0; | |
| 271 } | |
| 272 | |
| 273 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char
*name, BIO *bp, | |
| 274 pem_password_cb *cb, void *u) | |
| 275 { | |
| 276 EVP_CIPHER_INFO cipher; | |
| 277 char *nm=NULL,*header=NULL; | |
| 278 unsigned char *data=NULL; | |
| 279 long len; | |
| 280 int ret = 0; | |
| 281 | |
| 282 for (;;) | |
| 283 { | |
| 284 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) { | |
| 285 if(ERR_GET_REASON(ERR_peek_error()) == | |
| 286 PEM_R_NO_START_LINE) | |
| 287 ERR_add_error_data(2, "Expecting: ", name); | |
| 288 return 0; | |
| 289 } | |
| 290 if(check_pem(nm, name)) break; | |
| 291 OPENSSL_free(nm); | |
| 292 OPENSSL_free(header); | |
| 293 OPENSSL_free(data); | |
| 294 } | |
| 295 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err; | |
| 296 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err; | |
| 297 | |
| 298 *pdata = data; | |
| 299 *plen = len; | |
| 300 | |
| 301 if (pnm) | |
| 302 *pnm = nm; | |
| 303 | |
| 304 ret = 1; | |
| 305 | |
| 306 err: | |
| 307 if (!ret || !pnm) OPENSSL_free(nm); | |
| 308 OPENSSL_free(header); | |
| 309 if (!ret) OPENSSL_free(data); | |
| 310 return ret; | |
| 311 } | |
| 312 | |
| 313 #ifndef OPENSSL_NO_FP_API | |
| 314 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, | |
| 315 void *x, const EVP_CIPHER *enc, unsigned char *kstr, | |
| 316 int klen, pem_password_cb *callback, void *u) | |
| 317 { | |
| 318 BIO *b; | |
| 319 int ret; | |
| 320 | |
| 321 if ((b=BIO_new(BIO_s_file())) == NULL) | |
| 322 { | |
| 323 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB); | |
| 324 return(0); | |
| 325 } | |
| 326 BIO_set_fp(b,fp,BIO_NOCLOSE); | |
| 327 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u); | |
| 328 BIO_free(b); | |
| 329 return(ret); | |
| 330 } | |
| 331 #endif | |
| 332 | |
| 333 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, | |
| 334 void *x, const EVP_CIPHER *enc, unsigned char *kstr, | |
| 335 int klen, pem_password_cb *callback, void *u) | |
| 336 { | |
| 337 EVP_CIPHER_CTX ctx; | |
| 338 int dsize=0,i,j,ret=0; | |
| 339 unsigned char *p,*data=NULL; | |
| 340 const char *objstr=NULL; | |
| 341 char buf[PEM_BUFSIZE]; | |
| 342 unsigned char key[EVP_MAX_KEY_LENGTH]; | |
| 343 unsigned char iv[EVP_MAX_IV_LENGTH]; | |
| 344 | |
| 345 if (enc != NULL) | |
| 346 { | |
| 347 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc)); | |
| 348 if (objstr == NULL) | |
| 349 { | |
| 350 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER
); | |
| 351 goto err; | |
| 352 } | |
| 353 } | |
| 354 | |
| 355 if ((dsize=i2d(x,NULL)) < 0) | |
| 356 { | |
| 357 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB); | |
| 358 dsize=0; | |
| 359 goto err; | |
| 360 } | |
| 361 /* dzise + 8 bytes are needed */ | |
| 362 /* actually it needs the cipher block size extra... */ | |
| 363 data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20); | |
| 364 if (data == NULL) | |
| 365 { | |
| 366 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE); | |
| 367 goto err; | |
| 368 } | |
| 369 p=data; | |
| 370 i=i2d(x,&p); | |
| 371 | |
| 372 if (enc != NULL) | |
| 373 { | |
| 374 if (kstr == NULL) | |
| 375 { | |
| 376 if (callback == NULL) | |
| 377 klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u); | |
| 378 else | |
| 379 klen=(*callback)(buf,PEM_BUFSIZE,1,u); | |
| 380 if (klen <= 0) | |
| 381 { | |
| 382 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY); | |
| 383 goto err; | |
| 384 } | |
| 385 #ifdef CHARSET_EBCDIC | |
| 386 /* Convert the pass phrase from EBCDIC */ | |
| 387 ebcdic2ascii(buf, buf, klen); | |
| 388 #endif | |
| 389 kstr=(unsigned char *)buf; | |
| 390 } | |
| 391 RAND_add(data,i,0);/* put in the RSA key. */ | |
| 392 OPENSSL_assert(enc->iv_len <= (int)sizeof(iv)); | |
| 393 if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */ | |
| 394 goto err; | |
| 395 /* The 'iv' is used as the iv and as a salt. It is | |
| 396 * NOT taken from the BytesToKey function */ | |
| 397 if (!EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL)) | |
| 398 goto err; | |
| 399 | |
| 400 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZ
E); | |
| 401 | |
| 402 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf)
; | |
| 403 | |
| 404 buf[0]='\0'; | |
| 405 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED); | |
| 406 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv); | |
| 407 /* k=strlen(buf); */ | |
| 408 | |
| 409 EVP_CIPHER_CTX_init(&ctx); | |
| 410 ret = 1; | |
| 411 if (!EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv) | |
| 412 || !EVP_EncryptUpdate(&ctx,data,&j,data,i) | |
| 413 || !EVP_EncryptFinal_ex(&ctx,&(data[j]),&i)) | |
| 414 ret = 0; | |
| 415 EVP_CIPHER_CTX_cleanup(&ctx); | |
| 416 if (ret == 0) | |
| 417 goto err; | |
| 418 i+=j; | |
| 419 } | |
| 420 else | |
| 421 { | |
| 422 ret=1; | |
| 423 buf[0]='\0'; | |
| 424 } | |
| 425 i=PEM_write_bio(bp,name,buf,data,i); | |
| 426 if (i <= 0) ret=0; | |
| 427 err: | |
| 428 OPENSSL_cleanse(key,sizeof(key)); | |
| 429 OPENSSL_cleanse(iv,sizeof(iv)); | |
| 430 OPENSSL_cleanse((char *)&ctx,sizeof(ctx)); | |
| 431 OPENSSL_cleanse(buf,PEM_BUFSIZE); | |
| 432 if (data != NULL) | |
| 433 { | |
| 434 OPENSSL_cleanse(data,(unsigned int)dsize); | |
| 435 OPENSSL_free(data); | |
| 436 } | |
| 437 return(ret); | |
| 438 } | |
| 439 | |
| 440 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, | |
| 441 pem_password_cb *callback,void *u) | |
| 442 { | |
| 443 int i,j,o,klen; | |
| 444 long len; | |
| 445 EVP_CIPHER_CTX ctx; | |
| 446 unsigned char key[EVP_MAX_KEY_LENGTH]; | |
| 447 char buf[PEM_BUFSIZE]; | |
| 448 | |
| 449 len= *plen; | |
| 450 | |
| 451 if (cipher->cipher == NULL) return(1); | |
| 452 if (callback == NULL) | |
| 453 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u); | |
| 454 else | |
| 455 klen=callback(buf,PEM_BUFSIZE,0,u); | |
| 456 if (klen <= 0) | |
| 457 { | |
| 458 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ); | |
| 459 return(0); | |
| 460 } | |
| 461 #ifdef CHARSET_EBCDIC | |
| 462 /* Convert the pass phrase from EBCDIC */ | |
| 463 ebcdic2ascii(buf, buf, klen); | |
| 464 #endif | |
| 465 | |
| 466 if (!EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]), | |
| 467 (unsigned char *)buf,klen,1,key,NULL)) | |
| 468 return 0; | |
| 469 | |
| 470 j=(int)len; | |
| 471 EVP_CIPHER_CTX_init(&ctx); | |
| 472 o = EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0])); | |
| 473 if (o) | |
| 474 o = EVP_DecryptUpdate(&ctx,data,&i,data,j); | |
| 475 if (o) | |
| 476 o = EVP_DecryptFinal_ex(&ctx,&(data[i]),&j); | |
| 477 EVP_CIPHER_CTX_cleanup(&ctx); | |
| 478 OPENSSL_cleanse((char *)buf,sizeof(buf)); | |
| 479 OPENSSL_cleanse((char *)key,sizeof(key)); | |
| 480 j+=i; | |
| 481 if (!o) | |
| 482 { | |
| 483 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT); | |
| 484 return(0); | |
| 485 } | |
| 486 *plen=j; | |
| 487 return(1); | |
| 488 } | |
| 489 | |
| 490 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) | |
| 491 { | |
| 492 const EVP_CIPHER *enc=NULL; | |
| 493 char *p,c; | |
| 494 char **header_pp = &header; | |
| 495 | |
| 496 cipher->cipher=NULL; | |
| 497 if ((header == NULL) || (*header == '\0') || (*header == '\n')) | |
| 498 return(1); | |
| 499 if (strncmp(header,"Proc-Type: ",11) != 0) | |
| 500 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); ret
urn(0); } | |
| 501 header+=11; | |
| 502 if (*header != '4') return(0); header++; | |
| 503 if (*header != ',') return(0); header++; | |
| 504 if (strncmp(header,"ENCRYPTED",9) != 0) | |
| 505 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); ret
urn(0); } | |
| 506 for (; (*header != '\n') && (*header != '\0'); header++) | |
| 507 ; | |
| 508 if (*header == '\0') | |
| 509 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); retu
rn(0); } | |
| 510 header++; | |
| 511 if (strncmp(header,"DEK-Info: ",10) != 0) | |
| 512 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); retu
rn(0); } | |
| 513 header+=10; | |
| 514 | |
| 515 p=header; | |
| 516 for (;;) | |
| 517 { | |
| 518 c= *header; | |
| 519 #ifndef CHARSET_EBCDIC | |
| 520 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') || | |
| 521 ((c >= '0') && (c <= '9')))) | |
| 522 break; | |
| 523 #else | |
| 524 if (!( isupper(c) || (c == '-') || | |
| 525 isdigit(c))) | |
| 526 break; | |
| 527 #endif | |
| 528 header++; | |
| 529 } | |
| 530 *header='\0'; | |
| 531 cipher->cipher=enc=EVP_get_cipherbyname(p); | |
| 532 *header=c; | |
| 533 header++; | |
| 534 | |
| 535 if (enc == NULL) | |
| 536 { | |
| 537 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTIO
N); | |
| 538 return(0); | |
| 539 } | |
| 540 if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len)) | |
| 541 return(0); | |
| 542 | |
| 543 return(1); | |
| 544 } | |
| 545 | |
| 546 static int load_iv(char **fromp, unsigned char *to, int num) | |
| 547 { | |
| 548 int v,i; | |
| 549 char *from; | |
| 550 | |
| 551 from= *fromp; | |
| 552 for (i=0; i<num; i++) to[i]=0; | |
| 553 num*=2; | |
| 554 for (i=0; i<num; i++) | |
| 555 { | |
| 556 if ((*from >= '0') && (*from <= '9')) | |
| 557 v= *from-'0'; | |
| 558 else if ((*from >= 'A') && (*from <= 'F')) | |
| 559 v= *from-'A'+10; | |
| 560 else if ((*from >= 'a') && (*from <= 'f')) | |
| 561 v= *from-'a'+10; | |
| 562 else | |
| 563 { | |
| 564 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS); | |
| 565 return(0); | |
| 566 } | |
| 567 from++; | |
| 568 to[i/2]|=v<<(long)((!(i&1))*4); | |
| 569 } | |
| 570 | |
| 571 *fromp=from; | |
| 572 return(1); | |
| 573 } | |
| 574 | |
| 575 #ifndef OPENSSL_NO_FP_API | |
| 576 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data, | |
| 577 long len) | |
| 578 { | |
| 579 BIO *b; | |
| 580 int ret; | |
| 581 | |
| 582 if ((b=BIO_new(BIO_s_file())) == NULL) | |
| 583 { | |
| 584 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB); | |
| 585 return(0); | |
| 586 } | |
| 587 BIO_set_fp(b,fp,BIO_NOCLOSE); | |
| 588 ret=PEM_write_bio(b, name, header, data,len); | |
| 589 BIO_free(b); | |
| 590 return(ret); | |
| 591 } | |
| 592 #endif | |
| 593 | |
| 594 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data, | |
| 595 long len) | |
| 596 { | |
| 597 int nlen,n,i,j,outl; | |
| 598 unsigned char *buf = NULL; | |
| 599 EVP_ENCODE_CTX ctx; | |
| 600 int reason=ERR_R_BUF_LIB; | |
| 601 | |
| 602 EVP_EncodeInit(&ctx); | |
| 603 nlen=strlen(name); | |
| 604 | |
| 605 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) || | |
| 606 (BIO_write(bp,name,nlen) != nlen) || | |
| 607 (BIO_write(bp,"-----\n",6) != 6)) | |
| 608 goto err; | |
| 609 | |
| 610 i=strlen(header); | |
| 611 if (i > 0) | |
| 612 { | |
| 613 if ( (BIO_write(bp,header,i) != i) || | |
| 614 (BIO_write(bp,"\n",1) != 1)) | |
| 615 goto err; | |
| 616 } | |
| 617 | |
| 618 buf = OPENSSL_malloc(PEM_BUFSIZE*8); | |
| 619 if (buf == NULL) | |
| 620 { | |
| 621 reason=ERR_R_MALLOC_FAILURE; | |
| 622 goto err; | |
| 623 } | |
| 624 | |
| 625 i=j=0; | |
| 626 while (len > 0) | |
| 627 { | |
| 628 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len); | |
| 629 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n); | |
| 630 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl)) | |
| 631 goto err; | |
| 632 i+=outl; | |
| 633 len-=n; | |
| 634 j+=n; | |
| 635 } | |
| 636 EVP_EncodeFinal(&ctx,buf,&outl); | |
| 637 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err; | |
| 638 OPENSSL_cleanse(buf, PEM_BUFSIZE*8); | |
| 639 OPENSSL_free(buf); | |
| 640 buf = NULL; | |
| 641 if ( (BIO_write(bp,"-----END ",9) != 9) || | |
| 642 (BIO_write(bp,name,nlen) != nlen) || | |
| 643 (BIO_write(bp,"-----\n",6) != 6)) | |
| 644 goto err; | |
| 645 return(i+outl); | |
| 646 err: | |
| 647 if (buf) { | |
| 648 OPENSSL_cleanse(buf, PEM_BUFSIZE*8); | |
| 649 OPENSSL_free(buf); | |
| 650 } | |
| 651 PEMerr(PEM_F_PEM_WRITE_BIO,reason); | |
| 652 return(0); | |
| 653 } | |
| 654 | |
| 655 #ifndef OPENSSL_NO_FP_API | |
| 656 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, | |
| 657 long *len) | |
| 658 { | |
| 659 BIO *b; | |
| 660 int ret; | |
| 661 | |
| 662 if ((b=BIO_new(BIO_s_file())) == NULL) | |
| 663 { | |
| 664 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB); | |
| 665 return(0); | |
| 666 } | |
| 667 BIO_set_fp(b,fp,BIO_NOCLOSE); | |
| 668 ret=PEM_read_bio(b, name, header, data,len); | |
| 669 BIO_free(b); | |
| 670 return(ret); | |
| 671 } | |
| 672 #endif | |
| 673 | |
| 674 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, | |
| 675 long *len) | |
| 676 { | |
| 677 EVP_ENCODE_CTX ctx; | |
| 678 int end=0,i,k,bl=0,hl=0,nohead=0; | |
| 679 char buf[256]; | |
| 680 BUF_MEM *nameB; | |
| 681 BUF_MEM *headerB; | |
| 682 BUF_MEM *dataB,*tmpB; | |
| 683 | |
| 684 nameB=BUF_MEM_new(); | |
| 685 headerB=BUF_MEM_new(); | |
| 686 dataB=BUF_MEM_new(); | |
| 687 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) | |
| 688 { | |
| 689 BUF_MEM_free(nameB); | |
| 690 BUF_MEM_free(headerB); | |
| 691 BUF_MEM_free(dataB); | |
| 692 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); | |
| 693 return(0); | |
| 694 } | |
| 695 | |
| 696 buf[254]='\0'; | |
| 697 for (;;) | |
| 698 { | |
| 699 i=BIO_gets(bp,buf,254); | |
| 700 | |
| 701 if (i <= 0) | |
| 702 { | |
| 703 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE); | |
| 704 goto err; | |
| 705 } | |
| 706 | |
| 707 while ((i >= 0) && (buf[i] <= ' ')) i--; | |
| 708 buf[++i]='\n'; buf[++i]='\0'; | |
| 709 | |
| 710 if (strncmp(buf,"-----BEGIN ",11) == 0) | |
| 711 { | |
| 712 i=strlen(&(buf[11])); | |
| 713 | |
| 714 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0) | |
| 715 continue; | |
| 716 if (!BUF_MEM_grow(nameB,i+9)) | |
| 717 { | |
| 718 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); | |
| 719 goto err; | |
| 720 } | |
| 721 memcpy(nameB->data,&(buf[11]),i-6); | |
| 722 nameB->data[i-6]='\0'; | |
| 723 break; | |
| 724 } | |
| 725 } | |
| 726 hl=0; | |
| 727 if (!BUF_MEM_grow(headerB,256)) | |
| 728 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } | |
| 729 headerB->data[0]='\0'; | |
| 730 for (;;) | |
| 731 { | |
| 732 i=BIO_gets(bp,buf,254); | |
| 733 if (i <= 0) break; | |
| 734 | |
| 735 while ((i >= 0) && (buf[i] <= ' ')) i--; | |
| 736 buf[++i]='\n'; buf[++i]='\0'; | |
| 737 | |
| 738 if (buf[0] == '\n') break; | |
| 739 if (!BUF_MEM_grow(headerB,hl+i+9)) | |
| 740 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto
err; } | |
| 741 if (strncmp(buf,"-----END ",9) == 0) | |
| 742 { | |
| 743 nohead=1; | |
| 744 break; | |
| 745 } | |
| 746 memcpy(&(headerB->data[hl]),buf,i); | |
| 747 headerB->data[hl+i]='\0'; | |
| 748 hl+=i; | |
| 749 } | |
| 750 | |
| 751 bl=0; | |
| 752 if (!BUF_MEM_grow(dataB,1024)) | |
| 753 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } | |
| 754 dataB->data[0]='\0'; | |
| 755 if (!nohead) | |
| 756 { | |
| 757 for (;;) | |
| 758 { | |
| 759 i=BIO_gets(bp,buf,254); | |
| 760 if (i <= 0) break; | |
| 761 | |
| 762 while ((i >= 0) && (buf[i] <= ' ')) i--; | |
| 763 buf[++i]='\n'; buf[++i]='\0'; | |
| 764 | |
| 765 if (i != 65) end=1; | |
| 766 if (strncmp(buf,"-----END ",9) == 0) | |
| 767 break; | |
| 768 if (i > 65) break; | |
| 769 if (!BUF_MEM_grow_clean(dataB,i+bl+9)) | |
| 770 { | |
| 771 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); | |
| 772 goto err; | |
| 773 } | |
| 774 memcpy(&(dataB->data[bl]),buf,i); | |
| 775 dataB->data[bl+i]='\0'; | |
| 776 bl+=i; | |
| 777 if (end) | |
| 778 { | |
| 779 buf[0]='\0'; | |
| 780 i=BIO_gets(bp,buf,254); | |
| 781 if (i <= 0) break; | |
| 782 | |
| 783 while ((i >= 0) && (buf[i] <= ' ')) i--; | |
| 784 buf[++i]='\n'; buf[++i]='\0'; | |
| 785 | |
| 786 break; | |
| 787 } | |
| 788 } | |
| 789 } | |
| 790 else | |
| 791 { | |
| 792 tmpB=headerB; | |
| 793 headerB=dataB; | |
| 794 dataB=tmpB; | |
| 795 bl=hl; | |
| 796 } | |
| 797 i=strlen(nameB->data); | |
| 798 if ( (strncmp(buf,"-----END ",9) != 0) || | |
| 799 (strncmp(nameB->data,&(buf[9]),i) != 0) || | |
| 800 (strncmp(&(buf[9+i]),"-----\n",6) != 0)) | |
| 801 { | |
| 802 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE); | |
| 803 goto err; | |
| 804 } | |
| 805 | |
| 806 EVP_DecodeInit(&ctx); | |
| 807 i=EVP_DecodeUpdate(&ctx, | |
| 808 (unsigned char *)dataB->data,&bl, | |
| 809 (unsigned char *)dataB->data,bl); | |
| 810 if (i < 0) | |
| 811 { | |
| 812 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE); | |
| 813 goto err; | |
| 814 } | |
| 815 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k); | |
| 816 if (i < 0) | |
| 817 { | |
| 818 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE); | |
| 819 goto err; | |
| 820 } | |
| 821 bl+=k; | |
| 822 | |
| 823 if (bl == 0) goto err; | |
| 824 *name=nameB->data; | |
| 825 *header=headerB->data; | |
| 826 *data=(unsigned char *)dataB->data; | |
| 827 *len=bl; | |
| 828 OPENSSL_free(nameB); | |
| 829 OPENSSL_free(headerB); | |
| 830 OPENSSL_free(dataB); | |
| 831 return(1); | |
| 832 err: | |
| 833 BUF_MEM_free(nameB); | |
| 834 BUF_MEM_free(headerB); | |
| 835 BUF_MEM_free(dataB); | |
| 836 return(0); | |
| 837 } | |
| 838 | |
| 839 /* Check pem string and return prefix length. | |
| 840 * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" | |
| 841 * the return value is 3 for the string "RSA". | |
| 842 */ | |
| 843 | |
| 844 int pem_check_suffix(const char *pem_str, const char *suffix) | |
| 845 { | |
| 846 int pem_len = strlen(pem_str); | |
| 847 int suffix_len = strlen(suffix); | |
| 848 const char *p; | |
| 849 if (suffix_len + 1 >= pem_len) | |
| 850 return 0; | |
| 851 p = pem_str + pem_len - suffix_len; | |
| 852 if (strcmp(p, suffix)) | |
| 853 return 0; | |
| 854 p--; | |
| 855 if (*p != ' ') | |
| 856 return 0; | |
| 857 return p - pem_str; | |
| 858 } | |
| 859 | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master