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Allow passwords to be included on command line for a few
[thirdparty/openssl.git] / crypto / pem / pem_lib.c
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 "cryptlib.h"
61 #include <openssl/buffer.h>
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
64 #include <openssl/rand.h>
65 #include <openssl/x509.h>
66 #include <openssl/pem.h>
67 #include <openssl/pkcs12.h>
68 #ifndef NO_DES
69 #include <openssl/des.h>
70 #endif
71
72 const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
73
74 #define MIN_LENGTH 4
75
76 static int def_callback(char *buf, int num, int w, void *userdata);
77 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
78 static int check_pem(const char *nm, const char *name);
79 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,
80 int nid, const EVP_CIPHER *enc,
81 char *kstr, int klen,
82 pem_password_cb *cb, void *u);
83 static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,
84 int nid, const EVP_CIPHER *enc,
85 char *kstr, int klen,
86 pem_password_cb *cb, void *u);
87
88 static int def_callback(char *buf, int num, int w, void *userdata)
89 {
90 #ifdef NO_FP_API
91 /* We should not ever call the default callback routine from
92 * windows. */
93 PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
94 return(-1);
95 #else
96 int i,j;
97 const char *prompt;
98
99 prompt=EVP_get_pw_prompt();
100 if (prompt == NULL)
101 prompt="Enter PEM pass phrase:";
102
103 for (;;)
104 {
105 i=EVP_read_pw_string(buf,num,prompt,w);
106 if (i != 0)
107 {
108 PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
109 memset(buf,0,(unsigned int)num);
110 return(-1);
111 }
112 j=strlen(buf);
113 if (j < MIN_LENGTH)
114 {
115 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
116 }
117 else
118 break;
119 }
120 return(j);
121 #endif
122 }
123
124 /* This is a generic callback. If the user data is not NULL it is assumed
125 * to be a null terminated password. Otherwise the default password callback
126 * is called.
127 */
128
129
130 int MS_CALLBACK PEM_cb(char *buf, int len, int verify, void *key)
131 {
132 int i;
133 if (key == NULL) return def_callback(buf, len, verify, key);
134 i=strlen(key);
135 i=(i > len)?len:i;
136 memcpy(buf,key,i);
137 return(i);
138 }
139
140 void PEM_proc_type(char *buf, int type)
141 {
142 const char *str;
143
144 if (type == PEM_TYPE_ENCRYPTED)
145 str="ENCRYPTED";
146 else if (type == PEM_TYPE_MIC_CLEAR)
147 str="MIC-CLEAR";
148 else if (type == PEM_TYPE_MIC_ONLY)
149 str="MIC-ONLY";
150 else
151 str="BAD-TYPE";
152
153 strcat(buf,"Proc-Type: 4,");
154 strcat(buf,str);
155 strcat(buf,"\n");
156 }
157
158 void PEM_dek_info(char *buf, const char *type, int len, char *str)
159 {
160 static unsigned char map[17]="0123456789ABCDEF";
161 long i;
162 int j;
163
164 strcat(buf,"DEK-Info: ");
165 strcat(buf,type);
166 strcat(buf,",");
167 j=strlen(buf);
168 for (i=0; i<len; i++)
169 {
170 buf[j+i*2] =map[(str[i]>>4)&0x0f];
171 buf[j+i*2+1]=map[(str[i] )&0x0f];
172 }
173 buf[j+i*2]='\n';
174 buf[j+i*2+1]='\0';
175 }
176
177 #ifndef NO_FP_API
178 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
179 pem_password_cb *cb, void *u)
180 {
181 BIO *b;
182 char *ret;
183
184 if ((b=BIO_new(BIO_s_file())) == NULL)
185 {
186 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
187 return(0);
188 }
189 BIO_set_fp(b,fp,BIO_NOCLOSE);
190 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
191 BIO_free(b);
192 return(ret);
193 }
194 #endif
195
196 static int check_pem(const char *nm, const char *name)
197 {
198 /* Normal matching nm and name */
199 if (!strcmp(nm,name)) return 1;
200
201 /* Make PEM_STRING_EVP_PKEY match any private key */
202
203 if(!strcmp(nm,PEM_STRING_PKCS8) &&
204 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
205
206 if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
207 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
208
209 if(!strcmp(nm,PEM_STRING_RSA) &&
210 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
211
212 if(!strcmp(nm,PEM_STRING_DSA) &&
213 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
214
215 /* Permit older strings */
216
217 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
218 !strcmp(name,PEM_STRING_X509)) return 1;
219
220 if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
221 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
222
223 /* Allow normal certs to be read as trusted certs */
224 if(!strcmp(nm,PEM_STRING_X509) &&
225 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
226
227 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
228 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
229
230 return 0;
231 }
232
233 char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x,
234 pem_password_cb *cb, void *u)
235 {
236 EVP_CIPHER_INFO cipher;
237 char *nm=NULL,*header=NULL;
238 unsigned char *p=NULL,*data=NULL;
239 long len;
240 char *ret=NULL;
241
242 for (;;)
243 {
244 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
245 if(ERR_GET_REASON(ERR_peek_error()) ==
246 PEM_R_NO_START_LINE)
247 ERR_add_error_data(2, "Expecting: ", name);
248 return(NULL);
249 }
250 if(check_pem(nm, name)) break;
251 Free(nm);
252 Free(header);
253 Free(data);
254 }
255 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
256 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
257 p=data;
258 if (strcmp(name,PEM_STRING_EVP_PKEY) == 0) {
259 if (strcmp(nm,PEM_STRING_RSA) == 0)
260 ret=d2i(EVP_PKEY_RSA,x,&p,len);
261 else if (strcmp(nm,PEM_STRING_DSA) == 0)
262 ret=d2i(EVP_PKEY_DSA,x,&p,len);
263 else if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) {
264 PKCS8_PRIV_KEY_INFO *p8inf;
265 p8inf=d2i_PKCS8_PRIV_KEY_INFO(
266 (PKCS8_PRIV_KEY_INFO **) x, &p, len);
267 ret = (char *)EVP_PKCS82PKEY(p8inf);
268 PKCS8_PRIV_KEY_INFO_free(p8inf);
269 } else if (strcmp(nm,PEM_STRING_PKCS8) == 0) {
270 PKCS8_PRIV_KEY_INFO *p8inf;
271 X509_SIG *p8;
272 int klen;
273 char psbuf[PEM_BUFSIZE];
274 p8 = d2i_X509_SIG(NULL, &p, len);
275 if(!p8) goto p8err;
276 if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
277 else klen=def_callback(psbuf,PEM_BUFSIZE,0,u);
278 if (klen <= 0) {
279 PEMerr(PEM_F_PEM_ASN1_READ_BIO,
280 PEM_R_BAD_PASSWORD_READ);
281 goto err;
282 }
283 p8inf = M_PKCS8_decrypt(p8, psbuf, klen);
284 X509_SIG_free(p8);
285 if(!p8inf) goto p8err;
286 ret = (char *)EVP_PKCS82PKEY(p8inf);
287 if(x) {
288 if(*x) EVP_PKEY_free((EVP_PKEY *)*x);
289 *x = ret;
290 }
291 PKCS8_PRIV_KEY_INFO_free(p8inf);
292 }
293 } else ret=d2i(x,&p,len);
294 p8err:
295 if (ret == NULL)
296 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
297 err:
298 Free(nm);
299 Free(header);
300 Free(data);
301 return(ret);
302 }
303
304 #ifndef NO_FP_API
305 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
306 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
307 pem_password_cb *callback, void *u)
308 {
309 BIO *b;
310 int ret;
311
312 if ((b=BIO_new(BIO_s_file())) == NULL)
313 {
314 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
315 return(0);
316 }
317 BIO_set_fp(b,fp,BIO_NOCLOSE);
318 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
319 BIO_free(b);
320 return(ret);
321 }
322 #endif
323
324 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
325 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
326 pem_password_cb *callback, void *u)
327 {
328 EVP_CIPHER_CTX ctx;
329 int dsize=0,i,j,ret=0;
330 unsigned char *p,*data=NULL;
331 const char *objstr=NULL;
332 char buf[PEM_BUFSIZE];
333 unsigned char key[EVP_MAX_KEY_LENGTH];
334 unsigned char iv[EVP_MAX_IV_LENGTH];
335
336 if (enc != NULL)
337 {
338 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
339 if (objstr == NULL)
340 {
341 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
342 goto err;
343 }
344 }
345
346 if ((dsize=i2d(x,NULL)) < 0)
347 {
348 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
349 dsize=0;
350 goto err;
351 }
352 /* dzise + 8 bytes are needed */
353 data=(unsigned char *)Malloc((unsigned int)dsize+20);
354 if (data == NULL)
355 {
356 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
357 goto err;
358 }
359 p=data;
360 i=i2d(x,&p);
361
362 if (enc != NULL)
363 {
364 if (kstr == NULL)
365 {
366 if (callback == NULL)
367 klen=def_callback(buf,PEM_BUFSIZE,1,u);
368 else
369 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
370 if (klen <= 0)
371 {
372 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
373 goto err;
374 }
375 #ifdef CHARSET_EBCDIC
376 /* Convert the pass phrase from EBCDIC */
377 ebcdic2ascii(buf, buf, klen);
378 #endif
379 kstr=(unsigned char *)buf;
380 }
381 RAND_seed(data,i);/* put in the RSA key. */
382 RAND_bytes(iv,8); /* Generate a salt */
383 /* The 'iv' is used as the iv and as a salt. It is
384 * NOT taken from the BytesToKey function */
385 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
386
387 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
388
389 buf[0]='\0';
390 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
391 PEM_dek_info(buf,objstr,8,(char *)iv);
392 /* k=strlen(buf); */
393
394 EVP_EncryptInit(&ctx,enc,key,iv);
395 EVP_EncryptUpdate(&ctx,data,&j,data,i);
396 EVP_EncryptFinal(&ctx,&(data[j]),&i);
397 i+=j;
398 ret=1;
399 }
400 else
401 {
402 ret=1;
403 buf[0]='\0';
404 }
405 i=PEM_write_bio(bp,name,buf,data,i);
406 if (i <= 0) ret=0;
407 err:
408 memset(key,0,sizeof(key));
409 memset(iv,0,sizeof(iv));
410 memset((char *)&ctx,0,sizeof(ctx));
411 memset(buf,0,PEM_BUFSIZE);
412 memset(data,0,(unsigned int)dsize);
413 Free(data);
414 return(ret);
415 }
416
417 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
418 pem_password_cb *callback,void *u)
419 {
420 int i,j,o,klen;
421 long len;
422 EVP_CIPHER_CTX ctx;
423 unsigned char key[EVP_MAX_KEY_LENGTH];
424 char buf[PEM_BUFSIZE];
425
426 len= *plen;
427
428 if (cipher->cipher == NULL) return(1);
429 if (callback == NULL)
430 klen=def_callback(buf,PEM_BUFSIZE,0,u);
431 else
432 klen=callback(buf,PEM_BUFSIZE,0,u);
433 if (klen <= 0)
434 {
435 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
436 return(0);
437 }
438 #ifdef CHARSET_EBCDIC
439 /* Convert the pass phrase from EBCDIC */
440 ebcdic2ascii(buf, buf, klen);
441 #endif
442
443 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
444 (unsigned char *)buf,klen,1,key,NULL);
445
446 j=(int)len;
447 EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
448 EVP_DecryptUpdate(&ctx,data,&i,data,j);
449 o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
450 EVP_CIPHER_CTX_cleanup(&ctx);
451 memset((char *)buf,0,sizeof(buf));
452 memset((char *)key,0,sizeof(key));
453 j+=i;
454 if (!o)
455 {
456 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
457 return(0);
458 }
459 *plen=j;
460 return(1);
461 }
462
463 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
464 {
465 int o;
466 const EVP_CIPHER *enc=NULL;
467 char *p,c;
468
469 cipher->cipher=NULL;
470 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
471 return(1);
472 if (strncmp(header,"Proc-Type: ",11) != 0)
473 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
474 header+=11;
475 if (*header != '4') return(0); header++;
476 if (*header != ',') return(0); header++;
477 if (strncmp(header,"ENCRYPTED",9) != 0)
478 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
479 for (; (*header != '\n') && (*header != '\0'); header++)
480 ;
481 if (*header == '\0')
482 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
483 header++;
484 if (strncmp(header,"DEK-Info: ",10) != 0)
485 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
486 header+=10;
487
488 p=header;
489 for (;;)
490 {
491 c= *header;
492 #ifndef CHARSET_EBCDIC
493 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
494 ((c >= '0') && (c <= '9'))))
495 break;
496 #else
497 if (!( isupper(c) || (c == '-') ||
498 isdigit(c)))
499 break;
500 #endif
501 header++;
502 }
503 *header='\0';
504 o=OBJ_sn2nid(p);
505 cipher->cipher=enc=EVP_get_cipherbyname(p);
506 *header=c;
507 header++;
508
509 if (enc == NULL)
510 {
511 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
512 return(0);
513 }
514 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
515
516 return(1);
517 }
518
519 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
520 {
521 int v,i;
522 unsigned char *from;
523
524 from= *fromp;
525 for (i=0; i<num; i++) to[i]=0;
526 num*=2;
527 for (i=0; i<num; i++)
528 {
529 if ((*from >= '0') && (*from <= '9'))
530 v= *from-'0';
531 else if ((*from >= 'A') && (*from <= 'F'))
532 v= *from-'A'+10;
533 else if ((*from >= 'a') && (*from <= 'f'))
534 v= *from-'a'+10;
535 else
536 {
537 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
538 return(0);
539 }
540 from++;
541 to[i/2]|=v<<(long)((!(i&1))*4);
542 }
543
544 *fromp=from;
545 return(1);
546 }
547
548 #ifndef NO_FP_API
549 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
550 long len)
551 {
552 BIO *b;
553 int ret;
554
555 if ((b=BIO_new(BIO_s_file())) == NULL)
556 {
557 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
558 return(0);
559 }
560 BIO_set_fp(b,fp,BIO_NOCLOSE);
561 ret=PEM_write_bio(b, name, header, data,len);
562 BIO_free(b);
563 return(ret);
564 }
565 #endif
566
567 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
568 long len)
569 {
570 int nlen,n,i,j,outl;
571 unsigned char *buf;
572 EVP_ENCODE_CTX ctx;
573 int reason=ERR_R_BUF_LIB;
574
575 EVP_EncodeInit(&ctx);
576 nlen=strlen(name);
577
578 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
579 (BIO_write(bp,name,nlen) != nlen) ||
580 (BIO_write(bp,"-----\n",6) != 6))
581 goto err;
582
583 i=strlen(header);
584 if (i > 0)
585 {
586 if ( (BIO_write(bp,header,i) != i) ||
587 (BIO_write(bp,"\n",1) != 1))
588 goto err;
589 }
590
591 buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
592 if (buf == NULL)
593 {
594 reason=ERR_R_MALLOC_FAILURE;
595 goto err;
596 }
597
598 i=j=0;
599 while (len > 0)
600 {
601 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
602 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
603 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
604 goto err;
605 i+=outl;
606 len-=n;
607 j+=n;
608 }
609 EVP_EncodeFinal(&ctx,buf,&outl);
610 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
611 Free(buf);
612 if ( (BIO_write(bp,"-----END ",9) != 9) ||
613 (BIO_write(bp,name,nlen) != nlen) ||
614 (BIO_write(bp,"-----\n",6) != 6))
615 goto err;
616 return(i+outl);
617 err:
618 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
619 return(0);
620 }
621
622 #ifndef NO_FP_API
623 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
624 long *len)
625 {
626 BIO *b;
627 int ret;
628
629 if ((b=BIO_new(BIO_s_file())) == NULL)
630 {
631 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
632 return(0);
633 }
634 BIO_set_fp(b,fp,BIO_NOCLOSE);
635 ret=PEM_read_bio(b, name, header, data,len);
636 BIO_free(b);
637 return(ret);
638 }
639 #endif
640
641 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
642 long *len)
643 {
644 EVP_ENCODE_CTX ctx;
645 int end=0,i,k,bl=0,hl=0,nohead=0;
646 char buf[256];
647 BUF_MEM *nameB;
648 BUF_MEM *headerB;
649 BUF_MEM *dataB,*tmpB;
650
651 nameB=BUF_MEM_new();
652 headerB=BUF_MEM_new();
653 dataB=BUF_MEM_new();
654 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
655 {
656 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
657 return(0);
658 }
659
660 buf[254]='\0';
661 for (;;)
662 {
663 i=BIO_gets(bp,buf,254);
664
665 if (i <= 0)
666 {
667 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
668 goto err;
669 }
670
671 while ((i >= 0) && (buf[i] <= ' ')) i--;
672 buf[++i]='\n'; buf[++i]='\0';
673
674 if (strncmp(buf,"-----BEGIN ",11) == 0)
675 {
676 i=strlen(&(buf[11]));
677
678 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
679 continue;
680 if (!BUF_MEM_grow(nameB,i+9))
681 {
682 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
683 goto err;
684 }
685 memcpy(nameB->data,&(buf[11]),i-6);
686 nameB->data[i-6]='\0';
687 break;
688 }
689 }
690 hl=0;
691 if (!BUF_MEM_grow(headerB,256))
692 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
693 headerB->data[0]='\0';
694 for (;;)
695 {
696 i=BIO_gets(bp,buf,254);
697 if (i <= 0) break;
698
699 while ((i >= 0) && (buf[i] <= ' ')) i--;
700 buf[++i]='\n'; buf[++i]='\0';
701
702 if (buf[0] == '\n') break;
703 if (!BUF_MEM_grow(headerB,hl+i+9))
704 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
705 if (strncmp(buf,"-----END ",9) == 0)
706 {
707 nohead=1;
708 break;
709 }
710 memcpy(&(headerB->data[hl]),buf,i);
711 headerB->data[hl+i]='\0';
712 hl+=i;
713 }
714
715 bl=0;
716 if (!BUF_MEM_grow(dataB,1024))
717 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
718 dataB->data[0]='\0';
719 if (!nohead)
720 {
721 for (;;)
722 {
723 i=BIO_gets(bp,buf,254);
724 if (i <= 0) break;
725
726 while ((i >= 0) && (buf[i] <= ' ')) i--;
727 buf[++i]='\n'; buf[++i]='\0';
728
729 if (i != 65) end=1;
730 if (strncmp(buf,"-----END ",9) == 0)
731 break;
732 if (i > 65) break;
733 if (!BUF_MEM_grow(dataB,i+bl+9))
734 {
735 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
736 goto err;
737 }
738 memcpy(&(dataB->data[bl]),buf,i);
739 dataB->data[bl+i]='\0';
740 bl+=i;
741 if (end)
742 {
743 buf[0]='\0';
744 i=BIO_gets(bp,buf,254);
745 if (i <= 0) break;
746
747 while ((i >= 0) && (buf[i] <= ' ')) i--;
748 buf[++i]='\n'; buf[++i]='\0';
749
750 break;
751 }
752 }
753 }
754 else
755 {
756 tmpB=headerB;
757 headerB=dataB;
758 dataB=tmpB;
759 bl=hl;
760 }
761 i=strlen(nameB->data);
762 if ( (strncmp(buf,"-----END ",9) != 0) ||
763 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
764 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
765 {
766 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
767 goto err;
768 }
769
770 EVP_DecodeInit(&ctx);
771 i=EVP_DecodeUpdate(&ctx,
772 (unsigned char *)dataB->data,&bl,
773 (unsigned char *)dataB->data,bl);
774 if (i < 0)
775 {
776 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
777 goto err;
778 }
779 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
780 if (i < 0)
781 {
782 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
783 goto err;
784 }
785 bl+=k;
786
787 if (bl == 0) goto err;
788 *name=nameB->data;
789 *header=headerB->data;
790 *data=(unsigned char *)dataB->data;
791 *len=bl;
792 Free(nameB);
793 Free(headerB);
794 Free(dataB);
795 return(1);
796 err:
797 BUF_MEM_free(nameB);
798 BUF_MEM_free(headerB);
799 BUF_MEM_free(dataB);
800 return(0);
801 }
802
803 /* These functions write a private key in PKCS#8 format: it is a "drop in"
804 * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
805 * is NULL then it uses the unencrypted private key form. The 'nid' versions
806 * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
807 */
808
809 int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,
810 char *kstr, int klen,
811 pem_password_cb *cb, void *u)
812 {
813 return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
814 }
815
816 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
817 char *kstr, int klen,
818 pem_password_cb *cb, void *u)
819 {
820 return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
821 }
822
823 int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
824 char *kstr, int klen,
825 pem_password_cb *cb, void *u)
826 {
827 return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
828 }
829
830 int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
831 char *kstr, int klen,
832 pem_password_cb *cb, void *u)
833 {
834 return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
835 }
836
837 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
838 char *kstr, int klen,
839 pem_password_cb *cb, void *u)
840 {
841 X509_SIG *p8;
842 PKCS8_PRIV_KEY_INFO *p8inf;
843 char buf[PEM_BUFSIZE];
844 int ret;
845 if(!(p8inf = EVP_PKEY2PKCS8(x))) {
846 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
847 PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
848 return 0;
849 }
850 if(enc || (nid != -1)) {
851 if(!kstr) {
852 if(!cb) klen = def_callback(buf, PEM_BUFSIZE, 1, u);
853 else klen = cb(buf, PEM_BUFSIZE, 1, u);
854 if(klen <= 0) {
855 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
856 PEM_R_READ_KEY);
857 PKCS8_PRIV_KEY_INFO_free(p8inf);
858 return 0;
859 }
860
861 kstr = buf;
862 }
863 p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
864 if(kstr == buf) memset(buf, 0, klen);
865 PKCS8_PRIV_KEY_INFO_free(p8inf);
866 if(isder) ret = i2d_PKCS8_bio(bp, p8);
867 else ret = PEM_write_bio_PKCS8(bp, p8);
868 X509_SIG_free(p8);
869 return ret;
870 } else {
871 if(isder) ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
872 else ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
873 PKCS8_PRIV_KEY_INFO_free(p8inf);
874 return ret;
875 }
876 }
877
878 /* Finally the DER version to read PKCS#8 encrypted private keys. It has to be
879 * here to access the default callback.
880 */
881
882 EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
883 {
884 PKCS8_PRIV_KEY_INFO *p8inf = NULL;
885 X509_SIG *p8 = NULL;
886 int klen;
887 EVP_PKEY *ret;
888 char psbuf[PEM_BUFSIZE];
889 p8 = d2i_PKCS8_bio(bp, NULL);
890 if(!p8) return NULL;
891 if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
892 else klen=def_callback(psbuf,PEM_BUFSIZE,0,u);
893 if (klen <= 0) {
894 PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
895 X509_SIG_free(p8);
896 return NULL;
897 }
898 p8inf = M_PKCS8_decrypt(p8, psbuf, klen);
899 X509_SIG_free(p8);
900 if(!p8inf) return NULL;
901 ret = EVP_PKCS82PKEY(p8inf);
902 PKCS8_PRIV_KEY_INFO_free(p8inf);
903 if(!ret) return NULL;
904 if(x) {
905 if(*x) EVP_PKEY_free(*x);
906 *x = ret;
907 }
908 return ret;
909 }
910
911 #ifndef NO_FP_API
912
913 int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
914 char *kstr, int klen,
915 pem_password_cb *cb, void *u)
916 {
917 return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);
918 }
919
920 int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,
921 char *kstr, int klen,
922 pem_password_cb *cb, void *u)
923 {
924 return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);
925 }
926
927 int PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid,
928 char *kstr, int klen,
929 pem_password_cb *cb, void *u)
930 {
931 return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);
932 }
933
934 int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
935 char *kstr, int klen, pem_password_cb *cb, void *u)
936 {
937 return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);
938 }
939
940 static int do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
941 char *kstr, int klen,
942 pem_password_cb *cb, void *u)
943 {
944 BIO *bp;
945 int ret;
946 if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
947 PEMerr(PEM_F_PEM_F_DO_PK8KEY_FP,ERR_R_BUF_LIB);
948 return(0);
949 }
950 ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);
951 BIO_free(bp);
952 return ret;
953 }
954
955 EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u)
956 {
957 BIO *bp;
958 EVP_PKEY *ret;
959 if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
960 PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP,ERR_R_BUF_LIB);
961 return NULL;
962 }
963 ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
964 BIO_free(bp);
965 return ret;
966 }
967
968 #endif
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