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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 | |
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