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(unsigned 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_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_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 strcat(buf,"Proc-Type: 4,");
139 void PEM_dek_info(char *buf, const char *type, int len, char *str)
141 static const unsigned char map[17]="0123456789ABCDEF";
145 strcat(buf,"DEK-Info: ");
149 for (i=0; i<len; i++)
151 buf[j+i*2] =map[(str[i]>>4)&0x0f];
152 buf[j+i*2+1]=map[(str[i] )&0x0f];
158 #ifndef OPENSSL_NO_FP_API
159 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
160 pem_password_cb *cb, void *u)
165 if ((b=BIO_new(BIO_s_file())) == NULL)
167 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
170 BIO_set_fp(b,fp,BIO_NOCLOSE);
171 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
177 static int check_pem(const char *nm, const char *name)
179 /* Normal matching nm and name */
180 if (!strcmp(nm,name)) return 1;
182 /* Make PEM_STRING_EVP_PKEY match any private key */
184 if(!strcmp(nm,PEM_STRING_PKCS8) &&
185 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
187 if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
188 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
190 if(!strcmp(nm,PEM_STRING_RSA) &&
191 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
193 if(!strcmp(nm,PEM_STRING_DSA) &&
194 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
196 /* Permit older strings */
198 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
199 !strcmp(name,PEM_STRING_X509)) return 1;
201 if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
202 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
204 /* Allow normal certs to be read as trusted certs */
205 if(!strcmp(nm,PEM_STRING_X509) &&
206 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
208 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
209 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
211 /* Some CAs use PKCS#7 with CERTIFICATE headers */
212 if(!strcmp(nm, PEM_STRING_X509) &&
213 !strcmp(name, PEM_STRING_PKCS7)) return 1;
218 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
219 pem_password_cb *cb, void *u)
221 EVP_CIPHER_INFO cipher;
222 char *nm=NULL,*header=NULL;
223 unsigned char *data=NULL;
229 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
230 if(ERR_GET_REASON(ERR_peek_error()) ==
232 ERR_add_error_data(2, "Expecting: ", name);
235 if(check_pem(nm, name)) break;
237 OPENSSL_free(header);
240 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
241 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
252 if (!ret || !pnm) OPENSSL_free(nm);
253 OPENSSL_free(header);
254 if (!ret) OPENSSL_free(data);
258 #ifndef OPENSSL_NO_FP_API
259 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
260 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
261 pem_password_cb *callback, void *u)
266 if ((b=BIO_new(BIO_s_file())) == NULL)
268 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
271 BIO_set_fp(b,fp,BIO_NOCLOSE);
272 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
278 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
279 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
280 pem_password_cb *callback, void *u)
283 int dsize=0,i,j,ret=0;
284 unsigned char *p,*data=NULL;
285 const char *objstr=NULL;
286 char buf[PEM_BUFSIZE];
287 unsigned char key[EVP_MAX_KEY_LENGTH];
288 unsigned char iv[EVP_MAX_IV_LENGTH];
292 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
295 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
300 if ((dsize=i2d(x,NULL)) < 0)
302 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
306 /* dzise + 8 bytes are needed */
307 /* actually it needs the cipher block size extra... */
308 data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
311 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
321 if (callback == NULL)
322 klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
324 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
327 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
330 #ifdef CHARSET_EBCDIC
331 /* Convert the pass phrase from EBCDIC */
332 ebcdic2ascii(buf, buf, klen);
334 kstr=(unsigned char *)buf;
336 RAND_add(data,i,0);/* put in the RSA key. */
337 OPENSSL_assert(enc->iv_len <= sizeof iv);
338 if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
340 /* The 'iv' is used as the iv and as a salt. It is
341 * NOT taken from the BytesToKey function */
342 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
344 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
346 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
349 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
350 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
353 EVP_CIPHER_CTX_init(&ctx);
354 EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
355 EVP_EncryptUpdate(&ctx,data,&j,data,i);
356 EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
357 EVP_CIPHER_CTX_cleanup(&ctx);
366 i=PEM_write_bio(bp,name,buf,data,i);
369 OPENSSL_cleanse(key,sizeof(key));
370 OPENSSL_cleanse(iv,sizeof(iv));
371 OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
372 OPENSSL_cleanse(buf,PEM_BUFSIZE);
375 OPENSSL_cleanse(data,(unsigned int)dsize);
381 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
382 pem_password_cb *callback,void *u)
387 unsigned char key[EVP_MAX_KEY_LENGTH];
388 char buf[PEM_BUFSIZE];
392 if (cipher->cipher == NULL) return(1);
393 if (callback == NULL)
394 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
396 klen=callback(buf,PEM_BUFSIZE,0,u);
399 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
402 #ifdef CHARSET_EBCDIC
403 /* Convert the pass phrase from EBCDIC */
404 ebcdic2ascii(buf, buf, klen);
407 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
408 (unsigned char *)buf,klen,1,key,NULL);
411 EVP_CIPHER_CTX_init(&ctx);
412 EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
413 EVP_DecryptUpdate(&ctx,data,&i,data,j);
414 o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
415 EVP_CIPHER_CTX_cleanup(&ctx);
416 OPENSSL_cleanse((char *)buf,sizeof(buf));
417 OPENSSL_cleanse((char *)key,sizeof(key));
421 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
428 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
431 const EVP_CIPHER *enc=NULL;
435 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
437 if (strncmp(header,"Proc-Type: ",11) != 0)
438 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
440 if (*header != '4') return(0); header++;
441 if (*header != ',') return(0); header++;
442 if (strncmp(header,"ENCRYPTED",9) != 0)
443 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
444 for (; (*header != '\n') && (*header != '\0'); header++)
447 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
449 if (strncmp(header,"DEK-Info: ",10) != 0)
450 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
457 #ifndef CHARSET_EBCDIC
458 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
459 ((c >= '0') && (c <= '9'))))
462 if (!( isupper(c) || (c == '-') ||
470 cipher->cipher=enc=EVP_get_cipherbyname(p);
476 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
479 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),enc->iv_len)) return(0);
484 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
490 for (i=0; i<num; i++) to[i]=0;
492 for (i=0; i<num; i++)
494 if ((*from >= '0') && (*from <= '9'))
496 else if ((*from >= 'A') && (*from <= 'F'))
498 else if ((*from >= 'a') && (*from <= 'f'))
502 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
506 to[i/2]|=v<<(long)((!(i&1))*4);
513 #ifndef OPENSSL_NO_FP_API
514 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
520 if ((b=BIO_new(BIO_s_file())) == NULL)
522 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
525 BIO_set_fp(b,fp,BIO_NOCLOSE);
526 ret=PEM_write_bio(b, name, header, data,len);
532 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
538 int reason=ERR_R_BUF_LIB;
540 EVP_EncodeInit(&ctx);
543 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
544 (BIO_write(bp,name,nlen) != nlen) ||
545 (BIO_write(bp,"-----\n",6) != 6))
551 if ( (BIO_write(bp,header,i) != i) ||
552 (BIO_write(bp,"\n",1) != 1))
556 buf=(unsigned char *)OPENSSL_malloc(PEM_BUFSIZE*8);
559 reason=ERR_R_MALLOC_FAILURE;
566 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
567 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
568 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
574 EVP_EncodeFinal(&ctx,buf,&outl);
575 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
577 if ( (BIO_write(bp,"-----END ",9) != 9) ||
578 (BIO_write(bp,name,nlen) != nlen) ||
579 (BIO_write(bp,"-----\n",6) != 6))
583 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
587 #ifndef OPENSSL_NO_FP_API
588 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
594 if ((b=BIO_new(BIO_s_file())) == NULL)
596 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
599 BIO_set_fp(b,fp,BIO_NOCLOSE);
600 ret=PEM_read_bio(b, name, header, data,len);
606 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
610 int end=0,i,k,bl=0,hl=0,nohead=0;
614 BUF_MEM *dataB,*tmpB;
617 headerB=BUF_MEM_new();
619 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
621 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
628 i=BIO_gets(bp,buf,254);
632 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
636 while ((i >= 0) && (buf[i] <= ' ')) i--;
637 buf[++i]='\n'; buf[++i]='\0';
639 if (strncmp(buf,"-----BEGIN ",11) == 0)
641 i=strlen(&(buf[11]));
643 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
645 if (!BUF_MEM_grow(nameB,i+9))
647 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
650 memcpy(nameB->data,&(buf[11]),i-6);
651 nameB->data[i-6]='\0';
656 if (!BUF_MEM_grow(headerB,256))
657 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
658 headerB->data[0]='\0';
661 i=BIO_gets(bp,buf,254);
664 while ((i >= 0) && (buf[i] <= ' ')) i--;
665 buf[++i]='\n'; buf[++i]='\0';
667 if (buf[0] == '\n') break;
668 if (!BUF_MEM_grow(headerB,hl+i+9))
669 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
670 if (strncmp(buf,"-----END ",9) == 0)
675 memcpy(&(headerB->data[hl]),buf,i);
676 headerB->data[hl+i]='\0';
681 if (!BUF_MEM_grow(dataB,1024))
682 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
688 i=BIO_gets(bp,buf,254);
691 while ((i >= 0) && (buf[i] <= ' ')) i--;
692 buf[++i]='\n'; buf[++i]='\0';
695 if (strncmp(buf,"-----END ",9) == 0)
698 if (!BUF_MEM_grow_clean(dataB,i+bl+9))
700 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
703 memcpy(&(dataB->data[bl]),buf,i);
704 dataB->data[bl+i]='\0';
709 i=BIO_gets(bp,buf,254);
712 while ((i >= 0) && (buf[i] <= ' ')) i--;
713 buf[++i]='\n'; buf[++i]='\0';
726 i=strlen(nameB->data);
727 if ( (strncmp(buf,"-----END ",9) != 0) ||
728 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
729 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
731 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
735 EVP_DecodeInit(&ctx);
736 i=EVP_DecodeUpdate(&ctx,
737 (unsigned char *)dataB->data,&bl,
738 (unsigned char *)dataB->data,bl);
741 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
744 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
747 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
752 if (bl == 0) goto err;
754 *header=headerB->data;
755 *data=(unsigned char *)dataB->data;
758 OPENSSL_free(headerB);
763 BUF_MEM_free(headerB);