Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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_PASSWORD); |
| 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 least %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 | EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL); |
| 398 | |
| 399 | if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE); |
| 400 | |
| 401 | OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf); |
| 402 | |
| 403 | buf[0]='\0'; |
| 404 | PEM_proc_type(buf,PEM_TYPE_ENCRYPTED); |
| 405 | PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv); |
| 406 | /* k=strlen(buf); */ |
| 407 | |
| 408 | EVP_CIPHER_CTX_init(&ctx); |
| 409 | EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv); |
| 410 | EVP_EncryptUpdate(&ctx,data,&j,data,i); |
| 411 | EVP_EncryptFinal_ex(&ctx,&(data[j]),&i); |
| 412 | EVP_CIPHER_CTX_cleanup(&ctx); |
| 413 | i+=j; |
| 414 | ret=1; |
| 415 | } |
| 416 | else |
| 417 | { |
| 418 | ret=1; |
| 419 | buf[0]='\0'; |
| 420 | } |
| 421 | i=PEM_write_bio(bp,name,buf,data,i); |
| 422 | if (i <= 0) ret=0; |
| 423 | err: |
| 424 | OPENSSL_cleanse(key,sizeof(key)); |
| 425 | OPENSSL_cleanse(iv,sizeof(iv)); |
| 426 | OPENSSL_cleanse((char *)&ctx,sizeof(ctx)); |
| 427 | OPENSSL_cleanse(buf,PEM_BUFSIZE); |
| 428 | if (data != NULL) |
| 429 | { |
| 430 | OPENSSL_cleanse(data,(unsigned int)dsize); |
| 431 | OPENSSL_free(data); |
| 432 | } |
| 433 | return(ret); |
| 434 | } |
| 435 | |
| 436 | int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, |
| 437 | pem_password_cb *callback,void *u) |
| 438 | { |
| 439 | int i,j,o,klen; |
| 440 | long len; |
| 441 | EVP_CIPHER_CTX ctx; |
| 442 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
| 443 | char buf[PEM_BUFSIZE]; |
| 444 | |
| 445 | len= *plen; |
| 446 | |
| 447 | if (cipher->cipher == NULL) return(1); |
| 448 | if (callback == NULL) |
| 449 | klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u); |
| 450 | else |
| 451 | klen=callback(buf,PEM_BUFSIZE,0,u); |
| 452 | if (klen <= 0) |
| 453 | { |
| 454 | PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ); |
| 455 | return(0); |
| 456 | } |
| 457 | #ifdef CHARSET_EBCDIC |
| 458 | /* Convert the pass phrase from EBCDIC */ |
| 459 | ebcdic2ascii(buf, buf, klen); |
| 460 | #endif |
| 461 | |
| 462 | EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]), |
| 463 | (unsigned char *)buf,klen,1,key,NULL); |
| 464 | |
| 465 | j=(int)len; |
| 466 | EVP_CIPHER_CTX_init(&ctx); |
| 467 | EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0])); |
| 468 | EVP_DecryptUpdate(&ctx,data,&i,data,j); |
| 469 | o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j); |
| 470 | EVP_CIPHER_CTX_cleanup(&ctx); |
| 471 | OPENSSL_cleanse((char *)buf,sizeof(buf)); |
| 472 | OPENSSL_cleanse((char *)key,sizeof(key)); |
| 473 | j+=i; |
| 474 | if (!o) |
| 475 | { |
| 476 | PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT); |
| 477 | return(0); |
| 478 | } |
| 479 | *plen=j; |
| 480 | return(1); |
| 481 | } |
| 482 | |
| 483 | int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
| 484 | { |
| 485 | const EVP_CIPHER *enc=NULL; |
| 486 | char *p,c; |
| 487 | char **header_pp = &header; |
| 488 | |
| 489 | cipher->cipher=NULL; |
| 490 | if ((header == NULL) || (*header == '\0') || (*header == '\n')) |
| 491 | return(1); |
| 492 | if (strncmp(header,"Proc-Type: ",11) != 0) |
| 493 | { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); } |
| 494 | header+=11; |
| 495 | if (*header != '4') return(0); header++; |
| 496 | if (*header != ',') return(0); header++; |
| 497 | if (strncmp(header,"ENCRYPTED",9) != 0) |
| 498 | { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); } |
| 499 | for (; (*header != '\n') && (*header != '\0'); header++) |
| 500 | ; |
| 501 | if (*header == '\0') |
| 502 | { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); } |
| 503 | header++; |
| 504 | if (strncmp(header,"DEK-Info: ",10) != 0) |
| 505 | { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); } |
| 506 | header+=10; |
| 507 | |
| 508 | p=header; |
| 509 | for (;;) |
| 510 | { |
| 511 | c= *header; |
| 512 | #ifndef CHARSET_EBCDIC |
| 513 | if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') || |
| 514 | ((c >= '0') && (c <= '9')))) |
| 515 | break; |
| 516 | #else |
| 517 | if (!( isupper(c) || (c == '-') || |
| 518 | isdigit(c))) |
| 519 | break; |
| 520 | #endif |
| 521 | header++; |
| 522 | } |
| 523 | *header='\0'; |
| 524 | cipher->cipher=enc=EVP_get_cipherbyname(p); |
| 525 | *header=c; |
| 526 | header++; |
| 527 | |
| 528 | if (enc == NULL) |
| 529 | { |
| 530 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION); |
| 531 | return(0); |
| 532 | } |
| 533 | if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len)) |
| 534 | return(0); |
| 535 | |
| 536 | return(1); |
| 537 | } |
| 538 | |
| 539 | static int load_iv(char **fromp, unsigned char *to, int num) |
| 540 | { |
| 541 | int v,i; |
| 542 | char *from; |
| 543 | |
| 544 | from= *fromp; |
| 545 | for (i=0; i<num; i++) to[i]=0; |
| 546 | num*=2; |
| 547 | for (i=0; i<num; i++) |
| 548 | { |
| 549 | if ((*from >= '0') && (*from <= '9')) |
| 550 | v= *from-'0'; |
| 551 | else if ((*from >= 'A') && (*from <= 'F')) |
| 552 | v= *from-'A'+10; |
| 553 | else if ((*from >= 'a') && (*from <= 'f')) |
| 554 | v= *from-'a'+10; |
| 555 | else |
| 556 | { |
| 557 | PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS); |
| 558 | return(0); |
| 559 | } |
| 560 | from++; |
| 561 | to[i/2]|=v<<(long)((!(i&1))*4); |
| 562 | } |
| 563 | |
| 564 | *fromp=from; |
| 565 | return(1); |
| 566 | } |
| 567 | |
| 568 | #ifndef OPENSSL_NO_FP_API |
| 569 | int PEM_write(FILE *fp, char *name, char *header, unsigned char *data, |
| 570 | long len) |
| 571 | { |
| 572 | BIO *b; |
| 573 | int ret; |
| 574 | |
| 575 | if ((b=BIO_new(BIO_s_file())) == NULL) |
| 576 | { |
| 577 | PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB); |
| 578 | return(0); |
| 579 | } |
| 580 | BIO_set_fp(b,fp,BIO_NOCLOSE); |
| 581 | ret=PEM_write_bio(b, name, header, data,len); |
| 582 | BIO_free(b); |
| 583 | return(ret); |
| 584 | } |
| 585 | #endif |
| 586 | |
| 587 | int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data, |
| 588 | long len) |
| 589 | { |
| 590 | int nlen,n,i,j,outl; |
| 591 | unsigned char *buf = NULL; |
| 592 | EVP_ENCODE_CTX ctx; |
| 593 | int reason=ERR_R_BUF_LIB; |
| 594 | |
| 595 | EVP_EncodeInit(&ctx); |
| 596 | nlen=strlen(name); |
| 597 | |
| 598 | if ( (BIO_write(bp,"-----BEGIN ",11) != 11) || |
| 599 | (BIO_write(bp,name,nlen) != nlen) || |
| 600 | (BIO_write(bp,"-----\n",6) != 6)) |
| 601 | goto err; |
| 602 | |
| 603 | i=strlen(header); |
| 604 | if (i > 0) |
| 605 | { |
| 606 | if ( (BIO_write(bp,header,i) != i) || |
| 607 | (BIO_write(bp,"\n",1) != 1)) |
| 608 | goto err; |
| 609 | } |
| 610 | |
| 611 | buf = OPENSSL_malloc(PEM_BUFSIZE*8); |
| 612 | if (buf == NULL) |
| 613 | { |
| 614 | reason=ERR_R_MALLOC_FAILURE; |
| 615 | goto err; |
| 616 | } |
| 617 | |
| 618 | i=j=0; |
| 619 | while (len > 0) |
| 620 | { |
| 621 | n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len); |
| 622 | EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n); |
| 623 | if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl)) |
| 624 | goto err; |
| 625 | i+=outl; |
| 626 | len-=n; |
| 627 | j+=n; |
| 628 | } |
| 629 | EVP_EncodeFinal(&ctx,buf,&outl); |
| 630 | if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err; |
| 631 | OPENSSL_cleanse(buf, PEM_BUFSIZE*8); |
| 632 | OPENSSL_free(buf); |
| 633 | buf = NULL; |
| 634 | if ( (BIO_write(bp,"-----END ",9) != 9) || |
| 635 | (BIO_write(bp,name,nlen) != nlen) || |
| 636 | (BIO_write(bp,"-----\n",6) != 6)) |
| 637 | goto err; |
| 638 | return(i+outl); |
| 639 | err: |
| 640 | if (buf) { |
| 641 | OPENSSL_cleanse(buf, PEM_BUFSIZE*8); |
| 642 | OPENSSL_free(buf); |
| 643 | } |
| 644 | PEMerr(PEM_F_PEM_WRITE_BIO,reason); |
| 645 | return(0); |
| 646 | } |
| 647 | |
| 648 | #ifndef OPENSSL_NO_FP_API |
| 649 | int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, |
| 650 | long *len) |
| 651 | { |
| 652 | BIO *b; |
| 653 | int ret; |
| 654 | |
| 655 | if ((b=BIO_new(BIO_s_file())) == NULL) |
| 656 | { |
| 657 | PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB); |
| 658 | return(0); |
| 659 | } |
| 660 | BIO_set_fp(b,fp,BIO_NOCLOSE); |
| 661 | ret=PEM_read_bio(b, name, header, data,len); |
| 662 | BIO_free(b); |
| 663 | return(ret); |
| 664 | } |
| 665 | #endif |
| 666 | |
| 667 | int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, |
| 668 | long *len) |
| 669 | { |
| 670 | EVP_ENCODE_CTX ctx; |
| 671 | int end=0,i,k,bl=0,hl=0,nohead=0; |
| 672 | char buf[256]; |
| 673 | BUF_MEM *nameB; |
| 674 | BUF_MEM *headerB; |
| 675 | BUF_MEM *dataB,*tmpB; |
| 676 | |
| 677 | nameB=BUF_MEM_new(); |
| 678 | headerB=BUF_MEM_new(); |
| 679 | dataB=BUF_MEM_new(); |
| 680 | if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) |
| 681 | { |
| 682 | BUF_MEM_free(nameB); |
| 683 | BUF_MEM_free(headerB); |
| 684 | BUF_MEM_free(dataB); |
| 685 | PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); |
| 686 | return(0); |
| 687 | } |
| 688 | |
| 689 | buf[254]='\0'; |
| 690 | for (;;) |
| 691 | { |
| 692 | i=BIO_gets(bp,buf,254); |
| 693 | |
| 694 | if (i <= 0) |
| 695 | { |
| 696 | PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE); |
| 697 | goto err; |
| 698 | } |
| 699 | |
| 700 | while ((i >= 0) && (buf[i] <= ' ')) i--; |
| 701 | buf[++i]='\n'; buf[++i]='\0'; |
| 702 | |
| 703 | if (strncmp(buf,"-----BEGIN ",11) == 0) |
| 704 | { |
| 705 | i=strlen(&(buf[11])); |
| 706 | |
| 707 | if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0) |
| 708 | continue; |
| 709 | if (!BUF_MEM_grow(nameB,i+9)) |
| 710 | { |
| 711 | PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); |
| 712 | goto err; |
| 713 | } |
| 714 | memcpy(nameB->data,&(buf[11]),i-6); |
| 715 | nameB->data[i-6]='\0'; |
| 716 | break; |
| 717 | } |
| 718 | } |
| 719 | hl=0; |
| 720 | if (!BUF_MEM_grow(headerB,256)) |
| 721 | { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } |
| 722 | headerB->data[0]='\0'; |
| 723 | for (;;) |
| 724 | { |
| 725 | i=BIO_gets(bp,buf,254); |
| 726 | if (i <= 0) break; |
| 727 | |
| 728 | while ((i >= 0) && (buf[i] <= ' ')) i--; |
| 729 | buf[++i]='\n'; buf[++i]='\0'; |
| 730 | |
| 731 | if (buf[0] == '\n') break; |
| 732 | if (!BUF_MEM_grow(headerB,hl+i+9)) |
| 733 | { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } |
| 734 | if (strncmp(buf,"-----END ",9) == 0) |
| 735 | { |
| 736 | nohead=1; |
| 737 | break; |
| 738 | } |
| 739 | memcpy(&(headerB->data[hl]),buf,i); |
| 740 | headerB->data[hl+i]='\0'; |
| 741 | hl+=i; |
| 742 | } |
| 743 | |
| 744 | bl=0; |
| 745 | if (!BUF_MEM_grow(dataB,1024)) |
| 746 | { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; } |
| 747 | dataB->data[0]='\0'; |
| 748 | if (!nohead) |
| 749 | { |
| 750 | for (;;) |
| 751 | { |
| 752 | i=BIO_gets(bp,buf,254); |
| 753 | if (i <= 0) break; |
| 754 | |
| 755 | while ((i >= 0) && (buf[i] <= ' ')) i--; |
| 756 | buf[++i]='\n'; buf[++i]='\0'; |
| 757 | |
| 758 | if (i != 65) end=1; |
| 759 | if (strncmp(buf,"-----END ",9) == 0) |
| 760 | break; |
| 761 | if (i > 65) break; |
| 762 | if (!BUF_MEM_grow_clean(dataB,i+bl+9)) |
| 763 | { |
| 764 | PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); |
| 765 | goto err; |
| 766 | } |
| 767 | memcpy(&(dataB->data[bl]),buf,i); |
| 768 | dataB->data[bl+i]='\0'; |
| 769 | bl+=i; |
| 770 | if (end) |
| 771 | { |
| 772 | buf[0]='\0'; |
| 773 | i=BIO_gets(bp,buf,254); |
| 774 | if (i <= 0) break; |
| 775 | |
| 776 | while ((i >= 0) && (buf[i] <= ' ')) i--; |
| 777 | buf[++i]='\n'; buf[++i]='\0'; |
| 778 | |
| 779 | break; |
| 780 | } |
| 781 | } |
| 782 | } |
| 783 | else |
| 784 | { |
| 785 | tmpB=headerB; |
| 786 | headerB=dataB; |
| 787 | dataB=tmpB; |
| 788 | bl=hl; |
| 789 | } |
| 790 | i=strlen(nameB->data); |
| 791 | if ( (strncmp(buf,"-----END ",9) != 0) || |
| 792 | (strncmp(nameB->data,&(buf[9]),i) != 0) || |
| 793 | (strncmp(&(buf[9+i]),"-----\n",6) != 0)) |
| 794 | { |
| 795 | PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE); |
| 796 | goto err; |
| 797 | } |
| 798 | |
| 799 | EVP_DecodeInit(&ctx); |
| 800 | i=EVP_DecodeUpdate(&ctx, |
| 801 | (unsigned char *)dataB->data,&bl, |
| 802 | (unsigned char *)dataB->data,bl); |
| 803 | if (i < 0) |
| 804 | { |
| 805 | PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE); |
| 806 | goto err; |
| 807 | } |
| 808 | i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k); |
| 809 | if (i < 0) |
| 810 | { |
| 811 | PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE); |
| 812 | goto err; |
| 813 | } |
| 814 | bl+=k; |
| 815 | |
| 816 | if (bl == 0) goto err; |
| 817 | *name=nameB->data; |
| 818 | *header=headerB->data; |
| 819 | *data=(unsigned char *)dataB->data; |
| 820 | *len=bl; |
| 821 | OPENSSL_free(nameB); |
| 822 | OPENSSL_free(headerB); |
| 823 | OPENSSL_free(dataB); |
| 824 | return(1); |
| 825 | err: |
| 826 | BUF_MEM_free(nameB); |
| 827 | BUF_MEM_free(headerB); |
| 828 | BUF_MEM_free(dataB); |
| 829 | return(0); |
| 830 | } |
| 831 | |
| 832 | /* Check pem string and return prefix length. |
| 833 | * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" |
| 834 | * the return value is 3 for the string "RSA". |
| 835 | */ |
| 836 | |
| 837 | int pem_check_suffix(const char *pem_str, const char *suffix) |
| 838 | { |
| 839 | int pem_len = strlen(pem_str); |
| 840 | int suffix_len = strlen(suffix); |
| 841 | const char *p; |
| 842 | if (suffix_len + 1 >= pem_len) |
| 843 | return 0; |
| 844 | p = pem_str + pem_len - suffix_len; |
| 845 | if (strcmp(p, suffix)) |
| 846 | return 0; |
| 847 | p--; |
| 848 | if (*p != ' ') |
| 849 | return 0; |
| 850 | return p - pem_str; |
| 851 | } |
| 852 | |