1 /* crypto/pem/pem_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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>
72 const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
76 static int load_iv(char **fromp,unsigned char *to, int num);
77 static int check_pem(const char *nm, const char *name);
79 int PEM_def_callback(char *buf, int num, int w, void *key)
81 #ifdef OPENSSL_NO_FP_API
82 /* We should not ever call the default callback routine from
84 PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
96 prompt=EVP_get_pw_prompt();
98 prompt="Enter PEM pass phrase:";
102 i=EVP_read_pw_string(buf,num,prompt,w);
105 PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
106 memset(buf,0,(unsigned int)num);
112 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
121 void PEM_proc_type(char *buf, int type)
125 if (type == PEM_TYPE_ENCRYPTED)
127 else if (type == PEM_TYPE_MIC_CLEAR)
129 else if (type == PEM_TYPE_MIC_ONLY)
134 BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);
135 BUF_strlcat(buf,str,PEM_BUFSIZE);
136 BUF_strlcat(buf,"\n",PEM_BUFSIZE);
139 void PEM_dek_info(char *buf, const char *type, int len, char *str)
141 static const unsigned char map[17]="0123456789ABCDEF";
145 BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);
146 BUF_strlcat(buf,type,PEM_BUFSIZE);
147 BUF_strlcat(buf,",",PEM_BUFSIZE);
149 if (j + (len * 2) + 1 > PEM_BUFSIZE)
151 for (i=0; i<len; i++)
153 buf[j+i*2] =map[(str[i]>>4)&0x0f];
154 buf[j+i*2+1]=map[(str[i] )&0x0f];
160 #ifndef OPENSSL_NO_FP_API
161 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
162 pem_password_cb *cb, void *u)
167 if ((b=BIO_new(BIO_s_file())) == NULL)
169 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
172 BIO_set_fp(b,fp,BIO_NOCLOSE);
173 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
179 static int check_pem(const char *nm, const char *name)
181 /* Normal matching nm and name */
182 if (!strcmp(nm,name)) return 1;
184 /* Make PEM_STRING_EVP_PKEY match any private key */
186 if(!strcmp(nm,PEM_STRING_PKCS8) &&
187 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
189 if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
190 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
192 if(!strcmp(nm,PEM_STRING_RSA) &&
193 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
195 if(!strcmp(nm,PEM_STRING_DSA) &&
196 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
198 if(!strcmp(nm,PEM_STRING_ECPRIVATEKEY) &&
199 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
200 /* Permit older strings */
202 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
203 !strcmp(name,PEM_STRING_X509)) return 1;
205 if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
206 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
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;
212 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
213 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
215 /* Some CAs use PKCS#7 with CERTIFICATE headers */
216 if(!strcmp(nm, PEM_STRING_X509) &&
217 !strcmp(name, PEM_STRING_PKCS7)) return 1;
219 if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
220 !strcmp(name, PEM_STRING_PKCS7)) return 1;
225 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
226 pem_password_cb *cb, void *u)
228 EVP_CIPHER_INFO cipher;
229 char *nm=NULL,*header=NULL;
230 unsigned char *data=NULL;
236 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
237 if(ERR_GET_REASON(ERR_peek_error()) ==
239 ERR_add_error_data(2, "Expecting: ", name);
242 if(check_pem(nm, name)) break;
244 OPENSSL_free(header);
247 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
248 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
259 if (!ret || !pnm) OPENSSL_free(nm);
260 OPENSSL_free(header);
261 if (!ret) OPENSSL_free(data);
265 #ifndef OPENSSL_NO_FP_API
266 int 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)
273 if ((b=BIO_new(BIO_s_file())) == NULL)
275 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
278 BIO_set_fp(b,fp,BIO_NOCLOSE);
279 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
285 int 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)
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];
299 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
302 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
307 if ((dsize=i2d(x,NULL)) < 0)
309 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB);
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);
318 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
328 if (callback == NULL)
329 klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
331 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
334 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
337 #ifdef CHARSET_EBCDIC
338 /* Convert the pass phrase from EBCDIC */
339 ebcdic2ascii(buf, buf, klen);
341 kstr=(unsigned char *)buf;
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 */
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);
351 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
353 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
356 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
357 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
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);
373 i=PEM_write_bio(bp,name,buf,data,i);
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);
382 OPENSSL_cleanse(data,(unsigned int)dsize);
388 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
389 pem_password_cb *callback,void *u)
394 unsigned char key[EVP_MAX_KEY_LENGTH];
395 char buf[PEM_BUFSIZE];
399 if (cipher->cipher == NULL) return(1);
400 if (callback == NULL)
401 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
403 klen=callback(buf,PEM_BUFSIZE,0,u);
406 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
409 #ifdef CHARSET_EBCDIC
410 /* Convert the pass phrase from EBCDIC */
411 ebcdic2ascii(buf, buf, klen);
414 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
415 (unsigned char *)buf,klen,1,key,NULL);
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));
428 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
435 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
437 const EVP_CIPHER *enc=NULL;
439 char **header_pp = &header;
442 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
444 if (strncmp(header,"Proc-Type: ",11) != 0)
445 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
447 if (*header != '4') return(0); header++;
448 if (*header != ',') return(0); header++;
449 if (strncmp(header,"ENCRYPTED",9) != 0)
450 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
451 for (; (*header != '\n') && (*header != '\0'); header++)
454 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
456 if (strncmp(header,"DEK-Info: ",10) != 0)
457 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
464 #ifndef CHARSET_EBCDIC
465 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
466 ((c >= '0') && (c <= '9'))))
469 if (!( isupper(c) || (c == '-') ||
476 cipher->cipher=enc=EVP_get_cipherbyname(p);
482 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
485 if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len))
491 static int load_iv(char **fromp, unsigned char *to, int num)
497 for (i=0; i<num; i++) to[i]=0;
499 for (i=0; i<num; i++)
501 if ((*from >= '0') && (*from <= '9'))
503 else if ((*from >= 'A') && (*from <= 'F'))
505 else if ((*from >= 'a') && (*from <= 'f'))
509 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
513 to[i/2]|=v<<(long)((!(i&1))*4);
520 #ifndef OPENSSL_NO_FP_API
521 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
527 if ((b=BIO_new(BIO_s_file())) == NULL)
529 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
532 BIO_set_fp(b,fp,BIO_NOCLOSE);
533 ret=PEM_write_bio(b, name, header, data,len);
539 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
543 unsigned char *buf = NULL;
545 int reason=ERR_R_BUF_LIB;
547 EVP_EncodeInit(&ctx);
550 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
551 (BIO_write(bp,name,nlen) != nlen) ||
552 (BIO_write(bp,"-----\n",6) != 6))
558 if ( (BIO_write(bp,header,i) != i) ||
559 (BIO_write(bp,"\n",1) != 1))
563 buf = OPENSSL_malloc(PEM_BUFSIZE*8);
566 reason=ERR_R_MALLOC_FAILURE;
573 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
574 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
575 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
581 EVP_EncodeFinal(&ctx,buf,&outl);
582 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
583 OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
586 if ( (BIO_write(bp,"-----END ",9) != 9) ||
587 (BIO_write(bp,name,nlen) != nlen) ||
588 (BIO_write(bp,"-----\n",6) != 6))
593 OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
596 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
600 #ifndef OPENSSL_NO_FP_API
601 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
607 if ((b=BIO_new(BIO_s_file())) == NULL)
609 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
612 BIO_set_fp(b,fp,BIO_NOCLOSE);
613 ret=PEM_read_bio(b, name, header, data,len);
619 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
623 int end=0,i,k,bl=0,hl=0,nohead=0;
627 BUF_MEM *dataB,*tmpB;
630 headerB=BUF_MEM_new();
632 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
635 BUF_MEM_free(headerB);
637 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
644 i=BIO_gets(bp,buf,254);
648 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
652 while ((i >= 0) && (buf[i] <= ' ')) i--;
653 buf[++i]='\n'; buf[++i]='\0';
655 if (strncmp(buf,"-----BEGIN ",11) == 0)
657 i=strlen(&(buf[11]));
659 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
661 if (!BUF_MEM_grow(nameB,i+9))
663 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
666 memcpy(nameB->data,&(buf[11]),i-6);
667 nameB->data[i-6]='\0';
672 if (!BUF_MEM_grow(headerB,256))
673 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
674 headerB->data[0]='\0';
677 i=BIO_gets(bp,buf,254);
680 while ((i >= 0) && (buf[i] <= ' ')) i--;
681 buf[++i]='\n'; buf[++i]='\0';
683 if (buf[0] == '\n') break;
684 if (!BUF_MEM_grow(headerB,hl+i+9))
685 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
686 if (strncmp(buf,"-----END ",9) == 0)
691 memcpy(&(headerB->data[hl]),buf,i);
692 headerB->data[hl+i]='\0';
697 if (!BUF_MEM_grow(dataB,1024))
698 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
704 i=BIO_gets(bp,buf,254);
707 while ((i >= 0) && (buf[i] <= ' ')) i--;
708 buf[++i]='\n'; buf[++i]='\0';
711 if (strncmp(buf,"-----END ",9) == 0)
714 if (!BUF_MEM_grow_clean(dataB,i+bl+9))
716 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
719 memcpy(&(dataB->data[bl]),buf,i);
720 dataB->data[bl+i]='\0';
725 i=BIO_gets(bp,buf,254);
728 while ((i >= 0) && (buf[i] <= ' ')) i--;
729 buf[++i]='\n'; buf[++i]='\0';
742 i=strlen(nameB->data);
743 if ( (strncmp(buf,"-----END ",9) != 0) ||
744 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
745 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
747 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
751 EVP_DecodeInit(&ctx);
752 i=EVP_DecodeUpdate(&ctx,
753 (unsigned char *)dataB->data,&bl,
754 (unsigned char *)dataB->data,bl);
757 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
760 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
763 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
768 if (bl == 0) goto err;
770 *header=headerB->data;
771 *data=(unsigned char *)dataB->data;
774 OPENSSL_free(headerB);
779 BUF_MEM_free(headerB);