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.]
71 const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
75 /* PEMerr(PEM_F_PEM_WRITE_BIO,ERR_R_MALLOC_FAILURE);
76 * PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
80 static int def_callback(char *buf, int num, int w);
81 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
83 static int def_callback();
87 static int def_callback(char *buf, int num, int w)
90 /* We should not ever call the default callback routine from
92 PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
98 prompt=EVP_get_pw_prompt();
100 prompt="Enter PEM pass phrase:";
104 i=EVP_read_pw_string(buf,num,prompt,w);
107 PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
108 memset(buf,0,(unsigned int)num);
114 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
123 void PEM_proc_type(char *buf, int type)
127 if (type == PEM_TYPE_ENCRYPTED)
129 else if (type == PEM_TYPE_MIC_CLEAR)
131 else if (type == PEM_TYPE_MIC_ONLY)
136 strcat(buf,"Proc-Type: 4,");
141 void PEM_dek_info(char *buf, const char *type, int len, char *str)
143 static unsigned char map[17]="0123456789ABCDEF";
147 strcat(buf,"DEK-Info: ");
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];
161 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
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);
179 char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x,
182 EVP_CIPHER_INFO cipher;
183 char *nm=NULL,*header=NULL;
184 unsigned char *p=NULL,*data=NULL;
190 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) return(NULL);
191 if ( (strcmp(nm,name) == 0) ||
192 ((strcmp(nm,PEM_STRING_RSA) == 0) &&
193 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
194 ((strcmp(nm,PEM_STRING_DSA) == 0) &&
195 (strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
196 ((strcmp(nm,PEM_STRING_X509_OLD) == 0) &&
197 (strcmp(name,PEM_STRING_X509) == 0)) ||
198 ((strcmp(nm,PEM_STRING_X509_REQ_OLD) == 0) &&
199 (strcmp(name,PEM_STRING_X509_REQ) == 0))
206 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
207 if (!PEM_do_header(&cipher,data,&len,cb)) goto err;
209 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);
219 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
228 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
229 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
235 if ((b=BIO_new(BIO_s_file())) == NULL)
237 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
240 BIO_set_fp(b,fp,BIO_NOCLOSE);
241 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback);
247 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
248 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
252 int dsize=0,i,j,ret=0;
253 unsigned char *p,*data=NULL;
254 const char *objstr=NULL;
255 #define PEM_BUFSIZE 1024
256 char buf[PEM_BUFSIZE];
257 unsigned char key[EVP_MAX_KEY_LENGTH];
258 unsigned char iv[EVP_MAX_IV_LENGTH];
262 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
265 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
270 if ((dsize=i2d(x,NULL)) < 0)
272 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
276 /* dzise + 8 bytes are needed */
277 data=(unsigned char *)Malloc((unsigned int)dsize+20);
280 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
290 if (callback == NULL)
291 klen=def_callback(buf,PEM_BUFSIZE,1);
293 klen=(*callback)(buf,PEM_BUFSIZE,1);
296 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
299 kstr=(unsigned char *)buf;
301 RAND_seed(data,i);/* put in the RSA key. */
302 RAND_bytes(iv,8); /* Generate a salt */
303 /* The 'iv' is used as the iv and as a salt. It is
304 * NOT taken from the BytesToKey function */
305 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
307 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
310 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
311 PEM_dek_info(buf,objstr,8,(char *)iv);
314 EVP_EncryptInit(&ctx,enc,key,iv);
315 EVP_EncryptUpdate(&ctx,data,&j,data,i);
316 EVP_EncryptFinal(&ctx,&(data[j]),&i);
325 i=PEM_write_bio(bp,name,buf,data,i);
328 memset(key,0,sizeof(key));
329 memset(iv,0,sizeof(iv));
330 memset((char *)&ctx,0,sizeof(ctx));
331 memset(buf,0,PEM_BUFSIZE);
332 memset(data,0,(unsigned int)dsize);
337 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
343 unsigned char key[EVP_MAX_KEY_LENGTH];
344 char buf[PEM_BUFSIZE];
348 if (cipher->cipher == NULL) return(1);
349 if (callback == NULL)
350 klen=def_callback(buf,PEM_BUFSIZE,0);
352 klen=callback(buf,PEM_BUFSIZE,0);
355 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
358 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
359 (unsigned char *)buf,klen,1,key,NULL);
362 EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
363 EVP_DecryptUpdate(&ctx,data,&i,data,j);
364 o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
365 EVP_CIPHER_CTX_cleanup(&ctx);
366 memset((char *)buf,0,sizeof(buf));
367 memset((char *)key,0,sizeof(key));
371 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
378 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
381 const EVP_CIPHER *enc=NULL;
385 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
387 if (strncmp(header,"Proc-Type: ",11) != 0)
388 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
390 if (*header != '4') return(0); header++;
391 if (*header != ',') return(0); header++;
392 if (strncmp(header,"ENCRYPTED",9) != 0)
393 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
394 for (; (*header != '\n') && (*header != '\0'); header++)
397 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
399 if (strncmp(header,"DEK-Info: ",10) != 0)
400 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
407 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
408 ((c >= '0') && (c <= '9'))))
414 cipher->cipher=enc=EVP_get_cipherbyname(p);
420 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
423 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
428 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
434 for (i=0; i<num; i++) to[i]=0;
436 for (i=0; i<num; i++)
438 if ((*from >= '0') && (*from <= '9'))
440 else if ((*from >= 'A') && (*from <= 'F'))
442 else if ((*from >= 'a') && (*from <= 'f'))
446 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
450 to[i/2]|=v<<(long)((!(i&1))*4);
458 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
464 if ((b=BIO_new(BIO_s_file())) == NULL)
466 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
469 BIO_set_fp(b,fp,BIO_NOCLOSE);
470 ret=PEM_write_bio(b, name, header, data,len);
476 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
482 int reason=ERR_R_BUF_LIB;
484 EVP_EncodeInit(&ctx);
487 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
488 (BIO_write(bp,name,nlen) != nlen) ||
489 (BIO_write(bp,"-----\n",6) != 6))
495 if ( (BIO_write(bp,header,i) != i) ||
496 (BIO_write(bp,"\n",1) != 1))
500 buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
503 reason=ERR_R_MALLOC_FAILURE;
510 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
511 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
512 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
518 EVP_EncodeFinal(&ctx,buf,&outl);
519 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
521 if ( (BIO_write(bp,"-----END ",9) != 9) ||
522 (BIO_write(bp,name,nlen) != nlen) ||
523 (BIO_write(bp,"-----\n",6) != 6))
527 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
532 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
538 if ((b=BIO_new(BIO_s_file())) == NULL)
540 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
543 BIO_set_fp(b,fp,BIO_NOCLOSE);
544 ret=PEM_read_bio(b, name, header, data,len);
550 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
554 int end=0,i,k,bl=0,hl=0,nohead=0;
558 BUF_MEM *dataB,*tmpB;
561 headerB=BUF_MEM_new();
563 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
565 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
572 i=BIO_gets(bp,buf,254);
576 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
580 while ((i >= 0) && (buf[i] <= ' ')) i--;
581 buf[++i]='\n'; buf[++i]='\0';
583 if (strncmp(buf,"-----BEGIN ",11) == 0)
585 i=strlen(&(buf[11]));
587 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
589 if (!BUF_MEM_grow(nameB,i+9))
591 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
594 strncpy(nameB->data,&(buf[11]),(unsigned int)i-6);
595 nameB->data[i-6]='\0';
600 if (!BUF_MEM_grow(headerB,256))
601 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
602 headerB->data[0]='\0';
605 i=BIO_gets(bp,buf,254);
608 while ((i >= 0) && (buf[i] <= ' ')) i--;
609 buf[++i]='\n'; buf[++i]='\0';
611 if (buf[0] == '\n') break;
612 if (!BUF_MEM_grow(headerB,hl+i+9))
613 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
614 if (strncmp(buf,"-----END ",9) == 0)
619 strncpy(&(headerB->data[hl]),buf,(unsigned int)i);
620 headerB->data[hl+i]='\0';
625 if (!BUF_MEM_grow(dataB,1024))
626 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
632 i=BIO_gets(bp,buf,254);
635 while ((i >= 0) && (buf[i] <= ' ')) i--;
636 buf[++i]='\n'; buf[++i]='\0';
639 if (strncmp(buf,"-----END ",9) == 0)
642 if (!BUF_MEM_grow(dataB,i+bl+9))
644 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
647 strncpy(&(dataB->data[bl]),buf,(unsigned int)i);
648 dataB->data[bl+i]='\0';
653 i=BIO_gets(bp,buf,254);
656 while ((i >= 0) && (buf[i] <= ' ')) i--;
657 buf[++i]='\n'; buf[++i]='\0';
670 i=strlen(nameB->data);
671 if ( (strncmp(buf,"-----END ",9) != 0) ||
672 (strncmp(nameB->data,&(buf[9]),(unsigned int)i) != 0) ||
673 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
675 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
679 EVP_DecodeInit(&ctx);
680 i=EVP_DecodeUpdate(&ctx,
681 (unsigned char *)dataB->data,&bl,
682 (unsigned char *)dataB->data,bl);
685 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
688 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
691 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
696 if (bl == 0) goto err;
698 *header=headerB->data;
699 *data=(unsigned char *)dataB->data;
707 BUF_MEM_free(headerB);