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>
69 #include <openssl/des.h>
72 const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
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);
79 static int def_callback(char *buf, int num, int w, void *userdata)
82 /* We should not ever call the default callback routine from
84 PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
90 prompt=EVP_get_pw_prompt();
92 prompt="Enter PEM pass phrase:";
96 i=EVP_read_pw_string(buf,num,prompt,w);
99 PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
100 memset(buf,0,(unsigned int)num);
106 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
115 void PEM_proc_type(char *buf, int type)
119 if (type == PEM_TYPE_ENCRYPTED)
121 else if (type == PEM_TYPE_MIC_CLEAR)
123 else if (type == PEM_TYPE_MIC_ONLY)
128 strcat(buf,"Proc-Type: 4,");
133 void PEM_dek_info(char *buf, const char *type, int len, char *str)
135 static unsigned char map[17]="0123456789ABCDEF";
139 strcat(buf,"DEK-Info: ");
143 for (i=0; i<len; i++)
145 buf[j+i*2] =map[(str[i]>>4)&0x0f];
146 buf[j+i*2+1]=map[(str[i] )&0x0f];
153 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
154 pem_password_cb *cb, void *u)
159 if ((b=BIO_new(BIO_s_file())) == NULL)
161 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
164 BIO_set_fp(b,fp,BIO_NOCLOSE);
165 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
171 char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x,
172 pem_password_cb *cb, void *u)
174 EVP_CIPHER_INFO cipher;
175 char *nm=NULL,*header=NULL;
176 unsigned char *p=NULL,*data=NULL;
182 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
183 if(ERR_GET_REASON(ERR_peek_error()) ==
185 ERR_add_error_data(2, "Expecting: ", name);
188 if ( (strcmp(nm,name) == 0) ||
189 ((strcmp(nm,PEM_STRING_RSA) == 0) &&
190 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
191 ((strcmp(nm,PEM_STRING_DSA) == 0) &&
192 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
193 ((strcmp(nm,PEM_STRING_PKCS8) == 0) &&
194 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
195 ((strcmp(nm,PEM_STRING_PKCS8INF) == 0) &&
196 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
197 ((strcmp(nm,PEM_STRING_X509_OLD) == 0) &&
198 (strcmp(name,PEM_STRING_X509) == 0)) ||
199 ((strcmp(nm,PEM_STRING_X509_REQ_OLD) == 0) &&
200 (strcmp(name,PEM_STRING_X509_REQ) == 0))
207 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
208 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
210 if (strcmp(name,PEM_STRING_EVP_PKEY) == 0) {
211 if (strcmp(nm,PEM_STRING_RSA) == 0)
212 ret=d2i(EVP_PKEY_RSA,x,&p,len);
213 else if (strcmp(nm,PEM_STRING_DSA) == 0)
214 ret=d2i(EVP_PKEY_DSA,x,&p,len);
215 else if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) {
216 PKCS8_PRIV_KEY_INFO *p8inf;
217 p8inf=d2i_PKCS8_PRIV_KEY_INFO(
218 (PKCS8_PRIV_KEY_INFO **) x, &p, len);
219 ret = (char *)EVP_PKCS82PKEY(p8inf);
220 PKCS8_PRIV_KEY_INFO_free(p8inf);
221 } else if (strcmp(nm,PEM_STRING_PKCS8) == 0) {
222 PKCS8_PRIV_KEY_INFO *p8inf;
225 char psbuf[PEM_BUFSIZE];
226 p8 = d2i_X509_SIG((X509_SIG **)x, &p, len);
228 if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
229 else klen=def_callback(psbuf,PEM_BUFSIZE,0,u);
231 PEMerr(PEM_F_PEM_ASN1_READ_BIO,
232 PEM_R_BAD_PASSWORD_READ);
235 p8inf = M_PKCS8_decrypt(p8, psbuf, klen);
237 if(!p8inf) goto p8err;
238 ret = (char *)EVP_PKCS82PKEY(p8inf);
239 PKCS8_PRIV_KEY_INFO_free(p8inf);
241 } else ret=d2i(x,&p,len);
244 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
253 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
254 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
255 pem_password_cb *callback, void *u)
260 if ((b=BIO_new(BIO_s_file())) == NULL)
262 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
265 BIO_set_fp(b,fp,BIO_NOCLOSE);
266 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
272 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
273 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
274 pem_password_cb *callback, void *u)
277 int dsize=0,i,j,ret=0;
278 unsigned char *p,*data=NULL;
279 const char *objstr=NULL;
280 char buf[PEM_BUFSIZE];
281 unsigned char key[EVP_MAX_KEY_LENGTH];
282 unsigned char iv[EVP_MAX_IV_LENGTH];
286 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
289 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
294 if ((dsize=i2d(x,NULL)) < 0)
296 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
300 /* dzise + 8 bytes are needed */
301 data=(unsigned char *)Malloc((unsigned int)dsize+20);
304 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
314 if (callback == NULL)
315 klen=def_callback(buf,PEM_BUFSIZE,1,u);
317 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
320 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
323 #ifdef CHARSET_EBCDIC
324 /* Convert the pass phrase from EBCDIC */
325 ebcdic2ascii(buf, buf, klen);
327 kstr=(unsigned char *)buf;
329 RAND_seed(data,i);/* put in the RSA key. */
330 RAND_bytes(iv,8); /* Generate a salt */
331 /* The 'iv' is used as the iv and as a salt. It is
332 * NOT taken from the BytesToKey function */
333 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
335 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
338 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
339 PEM_dek_info(buf,objstr,8,(char *)iv);
342 EVP_EncryptInit(&ctx,enc,key,iv);
343 EVP_EncryptUpdate(&ctx,data,&j,data,i);
344 EVP_EncryptFinal(&ctx,&(data[j]),&i);
353 i=PEM_write_bio(bp,name,buf,data,i);
356 memset(key,0,sizeof(key));
357 memset(iv,0,sizeof(iv));
358 memset((char *)&ctx,0,sizeof(ctx));
359 memset(buf,0,PEM_BUFSIZE);
360 memset(data,0,(unsigned int)dsize);
365 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
366 pem_password_cb *callback,void *u)
371 unsigned char key[EVP_MAX_KEY_LENGTH];
372 char buf[PEM_BUFSIZE];
376 if (cipher->cipher == NULL) return(1);
377 if (callback == NULL)
378 klen=def_callback(buf,PEM_BUFSIZE,0,u);
380 klen=callback(buf,PEM_BUFSIZE,0,u);
383 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
386 #ifdef CHARSET_EBCDIC
387 /* Convert the pass phrase from EBCDIC */
388 ebcdic2ascii(buf, buf, klen);
391 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
392 (unsigned char *)buf,klen,1,key,NULL);
395 EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
396 EVP_DecryptUpdate(&ctx,data,&i,data,j);
397 o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
398 EVP_CIPHER_CTX_cleanup(&ctx);
399 memset((char *)buf,0,sizeof(buf));
400 memset((char *)key,0,sizeof(key));
404 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
411 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
414 const EVP_CIPHER *enc=NULL;
418 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
420 if (strncmp(header,"Proc-Type: ",11) != 0)
421 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
423 if (*header != '4') return(0); header++;
424 if (*header != ',') return(0); header++;
425 if (strncmp(header,"ENCRYPTED",9) != 0)
426 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
427 for (; (*header != '\n') && (*header != '\0'); header++)
430 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
432 if (strncmp(header,"DEK-Info: ",10) != 0)
433 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
440 #ifndef CHARSET_EBCDIC
441 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
442 ((c >= '0') && (c <= '9'))))
445 if (!( isupper(c) || (c == '-') ||
453 cipher->cipher=enc=EVP_get_cipherbyname(p);
459 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
462 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
467 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
473 for (i=0; i<num; i++) to[i]=0;
475 for (i=0; i<num; i++)
477 if ((*from >= '0') && (*from <= '9'))
479 else if ((*from >= 'A') && (*from <= 'F'))
481 else if ((*from >= 'a') && (*from <= 'f'))
485 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
489 to[i/2]|=v<<(long)((!(i&1))*4);
497 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
503 if ((b=BIO_new(BIO_s_file())) == NULL)
505 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
508 BIO_set_fp(b,fp,BIO_NOCLOSE);
509 ret=PEM_write_bio(b, name, header, data,len);
515 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
521 int reason=ERR_R_BUF_LIB;
523 EVP_EncodeInit(&ctx);
526 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
527 (BIO_write(bp,name,nlen) != nlen) ||
528 (BIO_write(bp,"-----\n",6) != 6))
534 if ( (BIO_write(bp,header,i) != i) ||
535 (BIO_write(bp,"\n",1) != 1))
539 buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
542 reason=ERR_R_MALLOC_FAILURE;
549 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
550 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
551 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
557 EVP_EncodeFinal(&ctx,buf,&outl);
558 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
560 if ( (BIO_write(bp,"-----END ",9) != 9) ||
561 (BIO_write(bp,name,nlen) != nlen) ||
562 (BIO_write(bp,"-----\n",6) != 6))
566 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
571 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
577 if ((b=BIO_new(BIO_s_file())) == NULL)
579 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
582 BIO_set_fp(b,fp,BIO_NOCLOSE);
583 ret=PEM_read_bio(b, name, header, data,len);
589 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
593 int end=0,i,k,bl=0,hl=0,nohead=0;
597 BUF_MEM *dataB,*tmpB;
600 headerB=BUF_MEM_new();
602 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
604 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
611 i=BIO_gets(bp,buf,254);
615 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
619 while ((i >= 0) && (buf[i] <= ' ')) i--;
620 buf[++i]='\n'; buf[++i]='\0';
622 if (strncmp(buf,"-----BEGIN ",11) == 0)
624 i=strlen(&(buf[11]));
626 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
628 if (!BUF_MEM_grow(nameB,i+9))
630 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
633 memcpy(nameB->data,&(buf[11]),i-6);
634 nameB->data[i-6]='\0';
639 if (!BUF_MEM_grow(headerB,256))
640 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
641 headerB->data[0]='\0';
644 i=BIO_gets(bp,buf,254);
647 while ((i >= 0) && (buf[i] <= ' ')) i--;
648 buf[++i]='\n'; buf[++i]='\0';
650 if (buf[0] == '\n') break;
651 if (!BUF_MEM_grow(headerB,hl+i+9))
652 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
653 if (strncmp(buf,"-----END ",9) == 0)
658 memcpy(&(headerB->data[hl]),buf,i);
659 headerB->data[hl+i]='\0';
664 if (!BUF_MEM_grow(dataB,1024))
665 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
671 i=BIO_gets(bp,buf,254);
674 while ((i >= 0) && (buf[i] <= ' ')) i--;
675 buf[++i]='\n'; buf[++i]='\0';
678 if (strncmp(buf,"-----END ",9) == 0)
681 if (!BUF_MEM_grow(dataB,i+bl+9))
683 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
686 memcpy(&(dataB->data[bl]),buf,i);
687 dataB->data[bl+i]='\0';
692 i=BIO_gets(bp,buf,254);
695 while ((i >= 0) && (buf[i] <= ' ')) i--;
696 buf[++i]='\n'; buf[++i]='\0';
709 i=strlen(nameB->data);
710 if ( (strncmp(buf,"-----END ",9) != 0) ||
711 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
712 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
714 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
718 EVP_DecodeInit(&ctx);
719 i=EVP_DecodeUpdate(&ctx,
720 (unsigned char *)dataB->data,&bl,
721 (unsigned char *)dataB->data,bl);
724 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
727 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
730 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
735 if (bl == 0) goto err;
737 *header=headerB->data;
738 *data=(unsigned char *)dataB->data;
746 BUF_MEM_free(headerB);
751 /* This function writes a private key in PKCS#8 format: it is a "drop in"
752 * replacement for PEM_write_bio_PrivateKey(). As usual if 'enc' is NULL then
753 * it uses the unencrypted private key form. It uses PKCS#5 v2.0 password based
754 * encryption algorithms.
757 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
758 char *kstr, int klen,
759 pem_password_cb *cb, void *u)
762 PKCS8_PRIV_KEY_INFO *p8inf;
763 char buf[PEM_BUFSIZE];
765 if(!(p8inf = EVP_PKEY2PKCS8(x))) {
766 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
767 PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
772 if(!cb) klen = def_callback(buf, PEM_BUFSIZE, 1, u);
773 else klen = cb(buf, PEM_BUFSIZE, 1, u);
775 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
777 PKCS8_PRIV_KEY_INFO_free(p8inf);
783 p8 = PKCS8_encrypt(-1, enc, kstr, klen, NULL, 0, 0, p8inf);
784 if(kstr == buf) memset(buf, 0, klen);
785 PKCS8_PRIV_KEY_INFO_free(p8inf);
786 ret = PEM_write_bio_PKCS8(bp, p8);
790 ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
791 PKCS8_PRIV_KEY_INFO_free(p8inf);
796 int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
797 char *kstr, int klen, pem_password_cb *cb, void *u)
801 if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
802 PEMerr(PEM_F_PEM_F_PEM_WRITE_PKCS8PRIVATEKEY,ERR_R_BUF_LIB);
805 ret = PEM_write_bio_PKCS8PrivateKey(bp, x, enc, kstr, klen, cb, u);