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 OPENSSL_NO_DES
69#include <openssl/des.h>
70#endif
71
72const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
73
74#define MIN_LENGTH	4
75
76static int load_iv(char **fromp,unsigned char *to, int num);
77static int check_pem(const char *nm, const char *name);
78
79int PEM_def_callback(char *buf, int num, int w, void *key)
80	{
81#ifdef OPENSSL_NO_FP_API
82	/* We should not ever call the default callback routine from
83	 * windows. */
84	PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
85	return(-1);
86#else
87	int i,j;
88	const char *prompt;
89	if(key) {
90		i=strlen(key);
91		i=(i > num)?num:i;
92		memcpy(buf,key,i);
93		return(i);
94	}
95
96	prompt=EVP_get_pw_prompt();
97	if (prompt == NULL)
98		prompt="Enter PEM pass phrase:";
99
100	for (;;)
101		{
102		i=EVP_read_pw_string(buf,num,prompt,w);
103		if (i != 0)
104			{
105			PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
106			memset(buf,0,(unsigned int)num);
107			return(-1);
108			}
109		j=strlen(buf);
110		if (j < MIN_LENGTH)
111			{
112			fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
113			}
114		else
115			break;
116		}
117	return(j);
118#endif
119	}
120
121void PEM_proc_type(char *buf, int type)
122	{
123	const char *str;
124
125	if (type == PEM_TYPE_ENCRYPTED)
126		str="ENCRYPTED";
127	else if (type == PEM_TYPE_MIC_CLEAR)
128		str="MIC-CLEAR";
129	else if (type == PEM_TYPE_MIC_ONLY)
130		str="MIC-ONLY";
131	else
132		str="BAD-TYPE";
133
134	BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);
135	BUF_strlcat(buf,str,PEM_BUFSIZE);
136	BUF_strlcat(buf,"\n",PEM_BUFSIZE);
137	}
138
139void PEM_dek_info(char *buf, const char *type, int len, char *str)
140	{
141	static const unsigned char map[17]="0123456789ABCDEF";
142	long i;
143	int j;
144
145	BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);
146	BUF_strlcat(buf,type,PEM_BUFSIZE);
147	BUF_strlcat(buf,",",PEM_BUFSIZE);
148	j=strlen(buf);
149	if (j + (len * 2) + 1 > PEM_BUFSIZE)
150        	return;
151	for (i=0; i<len; i++)
152		{
153		buf[j+i*2]  =map[(str[i]>>4)&0x0f];
154		buf[j+i*2+1]=map[(str[i]   )&0x0f];
155		}
156	buf[j+i*2]='\n';
157	buf[j+i*2+1]='\0';
158	}
159
160#ifndef OPENSSL_NO_FP_API
161void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
162		    pem_password_cb *cb, void *u)
163	{
164        BIO *b;
165        void *ret;
166
167        if ((b=BIO_new(BIO_s_file())) == NULL)
168		{
169		PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
170                return(0);
171		}
172        BIO_set_fp(b,fp,BIO_NOCLOSE);
173        ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
174        BIO_free(b);
175        return(ret);
176	}
177#endif
178
179static int check_pem(const char *nm, const char *name)
180{
181	/* Normal matching nm and name */
182	if (!strcmp(nm,name)) return 1;
183
184	/* Make PEM_STRING_EVP_PKEY match any private key */
185
186	if(!strcmp(nm,PEM_STRING_PKCS8) &&
187		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
188
189	if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
190		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
191
192	if(!strcmp(nm,PEM_STRING_RSA) &&
193		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
194
195	if(!strcmp(nm,PEM_STRING_DSA) &&
196		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
197
198 	if(!strcmp(nm,PEM_STRING_ECPRIVATEKEY) &&
199 		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
200	/* Permit older strings */
201
202	if(!strcmp(nm,PEM_STRING_X509_OLD) &&
203		!strcmp(name,PEM_STRING_X509)) return 1;
204
205	if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
206		!strcmp(name,PEM_STRING_X509_REQ)) return 1;
207
208	/* Allow normal certs to be read as trusted certs */
209	if(!strcmp(nm,PEM_STRING_X509) &&
210		!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
211
212	if(!strcmp(nm,PEM_STRING_X509_OLD) &&
213		!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
214
215	/* Some CAs use PKCS#7 with CERTIFICATE headers */
216	if(!strcmp(nm, PEM_STRING_X509) &&
217		!strcmp(name, PEM_STRING_PKCS7)) return 1;
218
219	if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
220		!strcmp(name, PEM_STRING_PKCS7)) return 1;
221
222	return 0;
223}
224
225int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
226	     pem_password_cb *cb, void *u)
227	{
228	EVP_CIPHER_INFO cipher;
229	char *nm=NULL,*header=NULL;
230	unsigned char *data=NULL;
231	long len;
232	int ret = 0;
233
234	for (;;)
235		{
236		if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
237			if(ERR_GET_REASON(ERR_peek_error()) ==
238				PEM_R_NO_START_LINE)
239				ERR_add_error_data(2, "Expecting: ", name);
240			return 0;
241		}
242		if(check_pem(nm, name)) break;
243		OPENSSL_free(nm);
244		OPENSSL_free(header);
245		OPENSSL_free(data);
246		}
247	if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
248	if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
249
250	*pdata = data;
251	*plen = len;
252
253	if (pnm)
254		*pnm = nm;
255
256	ret = 1;
257
258err:
259	if (!ret || !pnm) OPENSSL_free(nm);
260	OPENSSL_free(header);
261	if (!ret) OPENSSL_free(data);
262	return ret;
263	}
264
265#ifndef OPENSSL_NO_FP_API
266int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
267		   char *x, const EVP_CIPHER *enc, unsigned char *kstr,
268		   int klen, pem_password_cb *callback, void *u)
269        {
270        BIO *b;
271        int ret;
272
273        if ((b=BIO_new(BIO_s_file())) == NULL)
274		{
275		PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
276                return(0);
277		}
278        BIO_set_fp(b,fp,BIO_NOCLOSE);
279        ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
280        BIO_free(b);
281        return(ret);
282        }
283#endif
284
285int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
286		       char *x, const EVP_CIPHER *enc, unsigned char *kstr,
287		       int klen, pem_password_cb *callback, void *u)
288	{
289	EVP_CIPHER_CTX ctx;
290	int dsize=0,i,j,ret=0;
291	unsigned char *p,*data=NULL;
292	const char *objstr=NULL;
293	char buf[PEM_BUFSIZE];
294	unsigned char key[EVP_MAX_KEY_LENGTH];
295	unsigned char iv[EVP_MAX_IV_LENGTH];
296
297	if (enc != NULL)
298		{
299		objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
300		if (objstr == NULL)
301			{
302			PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
303			goto err;
304			}
305		}
306
307	if ((dsize=i2d(x,NULL)) < 0)
308		{
309		PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB);
310		dsize=0;
311		goto err;
312		}
313	/* dzise + 8 bytes are needed */
314	/* actually it needs the cipher block size extra... */
315	data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
316	if (data == NULL)
317		{
318		PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
319		goto err;
320		}
321	p=data;
322	i=i2d(x,&p);
323
324	if (enc != NULL)
325		{
326		if (kstr == NULL)
327			{
328			if (callback == NULL)
329				klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
330			else
331				klen=(*callback)(buf,PEM_BUFSIZE,1,u);
332			if (klen <= 0)
333				{
334				PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
335				goto err;
336				}
337#ifdef CHARSET_EBCDIC
338			/* Convert the pass phrase from EBCDIC */
339			ebcdic2ascii(buf, buf, klen);
340#endif
341			kstr=(unsigned char *)buf;
342			}
343		RAND_add(data,i,0);/* put in the RSA key. */
344		OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
345		if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
346			goto err;
347		/* The 'iv' is used as the iv and as a salt.  It is
348		 * NOT taken from the BytesToKey function */
349		EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
350
351		if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
352
353		OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
354
355		buf[0]='\0';
356		PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
357		PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
358		/* k=strlen(buf); */
359
360		EVP_CIPHER_CTX_init(&ctx);
361		EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
362		EVP_EncryptUpdate(&ctx,data,&j,data,i);
363		EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
364		EVP_CIPHER_CTX_cleanup(&ctx);
365		i+=j;
366		ret=1;
367		}
368	else
369		{
370		ret=1;
371		buf[0]='\0';
372		}
373	i=PEM_write_bio(bp,name,buf,data,i);
374	if (i <= 0) ret=0;
375err:
376	OPENSSL_cleanse(key,sizeof(key));
377	OPENSSL_cleanse(iv,sizeof(iv));
378	OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
379	OPENSSL_cleanse(buf,PEM_BUFSIZE);
380	if (data != NULL)
381		{
382		OPENSSL_cleanse(data,(unsigned int)dsize);
383		OPENSSL_free(data);
384		}
385	return(ret);
386	}
387
388int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
389	     pem_password_cb *callback,void *u)
390	{
391	int i,j,o,klen;
392	long len;
393	EVP_CIPHER_CTX ctx;
394	unsigned char key[EVP_MAX_KEY_LENGTH];
395	char buf[PEM_BUFSIZE];
396
397	len= *plen;
398
399	if (cipher->cipher == NULL) return(1);
400	if (callback == NULL)
401		klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
402	else
403		klen=callback(buf,PEM_BUFSIZE,0,u);
404	if (klen <= 0)
405		{
406		PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
407		return(0);
408		}
409#ifdef CHARSET_EBCDIC
410	/* Convert the pass phrase from EBCDIC */
411	ebcdic2ascii(buf, buf, klen);
412#endif
413
414	EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
415		(unsigned char *)buf,klen,1,key,NULL);
416
417	j=(int)len;
418	EVP_CIPHER_CTX_init(&ctx);
419	EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
420	EVP_DecryptUpdate(&ctx,data,&i,data,j);
421	o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
422	EVP_CIPHER_CTX_cleanup(&ctx);
423	OPENSSL_cleanse((char *)buf,sizeof(buf));
424	OPENSSL_cleanse((char *)key,sizeof(key));
425	j+=i;
426	if (!o)
427		{
428		PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
429		return(0);
430		}
431	*plen=j;
432	return(1);
433	}
434
435int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
436	{
437	int o;
438	const EVP_CIPHER *enc=NULL;
439	char *p,c;
440	char **header_pp = &header;
441
442	cipher->cipher=NULL;
443	if ((header == NULL) || (*header == '\0') || (*header == '\n'))
444		return(1);
445	if (strncmp(header,"Proc-Type: ",11) != 0)
446		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
447	header+=11;
448	if (*header != '4') return(0); header++;
449	if (*header != ',') return(0); header++;
450	if (strncmp(header,"ENCRYPTED",9) != 0)
451		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
452	for (; (*header != '\n') && (*header != '\0'); header++)
453		;
454	if (*header == '\0')
455		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
456	header++;
457	if (strncmp(header,"DEK-Info: ",10) != 0)
458		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
459	header+=10;
460
461	p=header;
462	for (;;)
463		{
464		c= *header;
465#ifndef CHARSET_EBCDIC
466		if (!(	((c >= 'A') && (c <= 'Z')) || (c == '-') ||
467			((c >= '0') && (c <= '9'))))
468			break;
469#else
470		if (!(	isupper(c) || (c == '-') ||
471			isdigit(c)))
472			break;
473#endif
474		header++;
475		}
476	*header='\0';
477	o=OBJ_sn2nid(p);
478	cipher->cipher=enc=EVP_get_cipherbyname(p);
479	*header=c;
480	header++;
481
482	if (enc == NULL)
483		{
484		PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
485		return(0);
486		}
487	if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len))
488		return(0);
489
490	return(1);
491	}
492
493static int load_iv(char **fromp, unsigned char *to, int num)
494	{
495	int v,i;
496	char *from;
497
498	from= *fromp;
499	for (i=0; i<num; i++) to[i]=0;
500	num*=2;
501	for (i=0; i<num; i++)
502		{
503		if ((*from >= '0') && (*from <= '9'))
504			v= *from-'0';
505		else if ((*from >= 'A') && (*from <= 'F'))
506			v= *from-'A'+10;
507		else if ((*from >= 'a') && (*from <= 'f'))
508			v= *from-'a'+10;
509		else
510			{
511			PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
512			return(0);
513			}
514		from++;
515		to[i/2]|=v<<(long)((!(i&1))*4);
516		}
517
518	*fromp=from;
519	return(1);
520	}
521
522#ifndef OPENSSL_NO_FP_API
523int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
524	     long len)
525        {
526        BIO *b;
527        int ret;
528
529        if ((b=BIO_new(BIO_s_file())) == NULL)
530		{
531		PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
532                return(0);
533		}
534        BIO_set_fp(b,fp,BIO_NOCLOSE);
535        ret=PEM_write_bio(b, name, header, data,len);
536        BIO_free(b);
537        return(ret);
538        }
539#endif
540
541int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
542	     long len)
543	{
544	int nlen,n,i,j,outl;
545	unsigned char *buf = NULL;
546	EVP_ENCODE_CTX ctx;
547	int reason=ERR_R_BUF_LIB;
548
549	EVP_EncodeInit(&ctx);
550	nlen=strlen(name);
551
552	if (	(BIO_write(bp,"-----BEGIN ",11) != 11) ||
553		(BIO_write(bp,name,nlen) != nlen) ||
554		(BIO_write(bp,"-----\n",6) != 6))
555		goto err;
556
557	i=strlen(header);
558	if (i > 0)
559		{
560		if (	(BIO_write(bp,header,i) != i) ||
561			(BIO_write(bp,"\n",1) != 1))
562			goto err;
563		}
564
565	buf = OPENSSL_malloc(PEM_BUFSIZE*8);
566	if (buf == NULL)
567		{
568		reason=ERR_R_MALLOC_FAILURE;
569		goto err;
570		}
571
572	i=j=0;
573	while (len > 0)
574		{
575		n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
576		EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
577		if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
578			goto err;
579		i+=outl;
580		len-=n;
581		j+=n;
582		}
583	EVP_EncodeFinal(&ctx,buf,&outl);
584	if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
585	OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
586	OPENSSL_free(buf);
587	buf = NULL;
588	if (	(BIO_write(bp,"-----END ",9) != 9) ||
589		(BIO_write(bp,name,nlen) != nlen) ||
590		(BIO_write(bp,"-----\n",6) != 6))
591		goto err;
592	return(i+outl);
593err:
594	if (buf) {
595		OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
596		OPENSSL_free(buf);
597	}
598	PEMerr(PEM_F_PEM_WRITE_BIO,reason);
599	return(0);
600	}
601
602#ifndef OPENSSL_NO_FP_API
603int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
604	     long *len)
605        {
606        BIO *b;
607        int ret;
608
609        if ((b=BIO_new(BIO_s_file())) == NULL)
610		{
611		PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
612                return(0);
613		}
614        BIO_set_fp(b,fp,BIO_NOCLOSE);
615        ret=PEM_read_bio(b, name, header, data,len);
616        BIO_free(b);
617        return(ret);
618        }
619#endif
620
621int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
622	     long *len)
623	{
624	EVP_ENCODE_CTX ctx;
625	int end=0,i,k,bl=0,hl=0,nohead=0;
626	char buf[256];
627	BUF_MEM *nameB;
628	BUF_MEM *headerB;
629	BUF_MEM *dataB,*tmpB;
630
631	nameB=BUF_MEM_new();
632	headerB=BUF_MEM_new();
633	dataB=BUF_MEM_new();
634	if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
635		{
636		BUF_MEM_free(nameB);
637		BUF_MEM_free(headerB);
638		BUF_MEM_free(dataB);
639		PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
640		return(0);
641		}
642
643	buf[254]='\0';
644	for (;;)
645		{
646		i=BIO_gets(bp,buf,254);
647
648		if (i <= 0)
649			{
650			PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
651			goto err;
652			}
653
654		while ((i >= 0) && (buf[i] <= ' ')) i--;
655		buf[++i]='\n'; buf[++i]='\0';
656
657		if (strncmp(buf,"-----BEGIN ",11) == 0)
658			{
659			i=strlen(&(buf[11]));
660
661			if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
662				continue;
663			if (!BUF_MEM_grow(nameB,i+9))
664				{
665				PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
666				goto err;
667				}
668			memcpy(nameB->data,&(buf[11]),i-6);
669			nameB->data[i-6]='\0';
670			break;
671			}
672		}
673	hl=0;
674	if (!BUF_MEM_grow(headerB,256))
675		{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
676	headerB->data[0]='\0';
677	for (;;)
678		{
679		i=BIO_gets(bp,buf,254);
680		if (i <= 0) break;
681
682		while ((i >= 0) && (buf[i] <= ' ')) i--;
683		buf[++i]='\n'; buf[++i]='\0';
684
685		if (buf[0] == '\n') break;
686		if (!BUF_MEM_grow(headerB,hl+i+9))
687			{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
688		if (strncmp(buf,"-----END ",9) == 0)
689			{
690			nohead=1;
691			break;
692			}
693		memcpy(&(headerB->data[hl]),buf,i);
694		headerB->data[hl+i]='\0';
695		hl+=i;
696		}
697
698	bl=0;
699	if (!BUF_MEM_grow(dataB,1024))
700		{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
701	dataB->data[0]='\0';
702	if (!nohead)
703		{
704		for (;;)
705			{
706			i=BIO_gets(bp,buf,254);
707			if (i <= 0) break;
708
709			while ((i >= 0) && (buf[i] <= ' ')) i--;
710			buf[++i]='\n'; buf[++i]='\0';
711
712			if (i != 65) end=1;
713			if (strncmp(buf,"-----END ",9) == 0)
714				break;
715			if (i > 65) break;
716			if (!BUF_MEM_grow_clean(dataB,i+bl+9))
717				{
718				PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
719				goto err;
720				}
721			memcpy(&(dataB->data[bl]),buf,i);
722			dataB->data[bl+i]='\0';
723			bl+=i;
724			if (end)
725				{
726				buf[0]='\0';
727				i=BIO_gets(bp,buf,254);
728				if (i <= 0) break;
729
730				while ((i >= 0) && (buf[i] <= ' ')) i--;
731				buf[++i]='\n'; buf[++i]='\0';
732
733				break;
734				}
735			}
736		}
737	else
738		{
739		tmpB=headerB;
740		headerB=dataB;
741		dataB=tmpB;
742		bl=hl;
743		}
744	i=strlen(nameB->data);
745	if (	(strncmp(buf,"-----END ",9) != 0) ||
746		(strncmp(nameB->data,&(buf[9]),i) != 0) ||
747		(strncmp(&(buf[9+i]),"-----\n",6) != 0))
748		{
749		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
750		goto err;
751		}
752
753	EVP_DecodeInit(&ctx);
754	i=EVP_DecodeUpdate(&ctx,
755		(unsigned char *)dataB->data,&bl,
756		(unsigned char *)dataB->data,bl);
757	if (i < 0)
758		{
759		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
760		goto err;
761		}
762	i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
763	if (i < 0)
764		{
765		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
766		goto err;
767		}
768	bl+=k;
769
770	if (bl == 0) goto err;
771	*name=nameB->data;
772	*header=headerB->data;
773	*data=(unsigned char *)dataB->data;
774	*len=bl;
775	OPENSSL_free(nameB);
776	OPENSSL_free(headerB);
777	OPENSSL_free(dataB);
778	return(1);
779err:
780	BUF_MEM_free(nameB);
781	BUF_MEM_free(headerB);
782	BUF_MEM_free(dataB);
783	return(0);
784	}
785