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
83 * We should not ever call the default callback routine from windows.
85 PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
92 i = (i > num) ? num : i;
97 prompt = EVP_get_pw_prompt();
99 prompt = "Enter PEM pass phrase:";
102 i = EVP_read_pw_string(buf, num, prompt, w);
104 PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
105 memset(buf, 0, (unsigned int)num);
109 if (j < MIN_LENGTH) {
111 "phrase is too short, needs to be at least %d chars\n",
120 void PEM_proc_type(char *buf, int type)
124 if (type == PEM_TYPE_ENCRYPTED)
126 else if (type == PEM_TYPE_MIC_CLEAR)
128 else if (type == PEM_TYPE_MIC_ONLY)
133 BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
134 BUF_strlcat(buf, str, PEM_BUFSIZE);
135 BUF_strlcat(buf, "\n", PEM_BUFSIZE);
138 void PEM_dek_info(char *buf, const char *type, int len, char *str)
140 static const unsigned char map[17] = "0123456789ABCDEF";
144 BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
145 BUF_strlcat(buf, type, PEM_BUFSIZE);
146 BUF_strlcat(buf, ",", PEM_BUFSIZE);
148 if (j + (len * 2) + 1 > PEM_BUFSIZE)
150 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];
154 buf[j + i * 2] = '\n';
155 buf[j + i * 2 + 1] = '\0';
158 #ifndef OPENSSL_NO_FP_API
159 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
160 pem_password_cb *cb, void *u)
165 if ((b = BIO_new(BIO_s_file())) == NULL) {
166 PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
169 BIO_set_fp(b, fp, BIO_NOCLOSE);
170 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
176 static int check_pem(const char *nm, const char *name)
178 /* Normal matching nm and name */
179 if (!strcmp(nm, name))
182 /* Make PEM_STRING_EVP_PKEY match any private key */
184 if (!strcmp(nm, PEM_STRING_PKCS8) && !strcmp(name, PEM_STRING_EVP_PKEY))
187 if (!strcmp(nm, PEM_STRING_PKCS8INF) &&
188 !strcmp(name, PEM_STRING_EVP_PKEY))
191 if (!strcmp(nm, PEM_STRING_RSA) && !strcmp(name, PEM_STRING_EVP_PKEY))
194 if (!strcmp(nm, PEM_STRING_DSA) && !strcmp(name, PEM_STRING_EVP_PKEY))
197 if (!strcmp(nm, PEM_STRING_ECPRIVATEKEY) &&
198 !strcmp(name, PEM_STRING_EVP_PKEY))
200 /* Permit older strings */
202 if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509))
205 if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
206 !strcmp(name, PEM_STRING_X509_REQ))
209 /* Allow normal certs to be read as trusted certs */
210 if (!strcmp(nm, PEM_STRING_X509) &&
211 !strcmp(name, PEM_STRING_X509_TRUSTED))
214 if (!strcmp(nm, PEM_STRING_X509_OLD) &&
215 !strcmp(name, PEM_STRING_X509_TRUSTED))
218 /* Some CAs use PKCS#7 with CERTIFICATE headers */
219 if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7))
222 if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
223 !strcmp(name, PEM_STRING_PKCS7))
229 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
230 const char *name, BIO *bp, pem_password_cb *cb,
233 EVP_CIPHER_INFO cipher;
234 char *nm = NULL, *header = NULL;
235 unsigned char *data = NULL;
240 if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
241 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
242 ERR_add_error_data(2, "Expecting: ", name);
245 if (check_pem(nm, name))
248 OPENSSL_free(header);
251 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
253 if (!PEM_do_header(&cipher, data, &len, cb, u))
267 OPENSSL_free(header);
273 #ifndef OPENSSL_NO_FP_API
274 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
275 char *x, const EVP_CIPHER *enc, unsigned char *kstr,
276 int klen, pem_password_cb *callback, void *u)
281 if ((b = BIO_new(BIO_s_file())) == NULL) {
282 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
285 BIO_set_fp(b, fp, BIO_NOCLOSE);
286 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
292 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
293 char *x, const EVP_CIPHER *enc, unsigned char *kstr,
294 int klen, pem_password_cb *callback, void *u)
297 int dsize = 0, i, j, ret = 0;
298 unsigned char *p, *data = NULL;
299 const char *objstr = NULL;
300 char buf[PEM_BUFSIZE];
301 unsigned char key[EVP_MAX_KEY_LENGTH];
302 unsigned char iv[EVP_MAX_IV_LENGTH];
305 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
306 if (objstr == NULL) {
307 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
312 if ((dsize = i2d(x, NULL)) < 0) {
313 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
317 /* dzise + 8 bytes are needed */
318 /* actually it needs the cipher block size extra... */
319 data = (unsigned char *)OPENSSL_malloc((unsigned int)dsize + 20);
321 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
329 if (callback == NULL)
330 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
332 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 */
348 * The 'iv' is used as the iv and as a salt. It is NOT taken from
349 * the BytesToKey function
351 EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL);
353 if (kstr == (unsigned char *)buf)
354 OPENSSL_cleanse(buf, PEM_BUFSIZE);
356 OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <=
360 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
361 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
364 EVP_CIPHER_CTX_init(&ctx);
365 EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv);
366 EVP_EncryptUpdate(&ctx, data, &j, data, i);
367 EVP_EncryptFinal_ex(&ctx, &(data[j]), &i);
368 EVP_CIPHER_CTX_cleanup(&ctx);
375 i = PEM_write_bio(bp, name, buf, data, i);
379 OPENSSL_cleanse(key, sizeof(key));
380 OPENSSL_cleanse(iv, sizeof(iv));
381 OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
382 OPENSSL_cleanse(buf, PEM_BUFSIZE);
384 OPENSSL_cleanse(data, (unsigned int)dsize);
390 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
391 pem_password_cb *callback, void *u)
396 unsigned char key[EVP_MAX_KEY_LENGTH];
397 char buf[PEM_BUFSIZE];
401 if (cipher->cipher == NULL)
403 if (callback == NULL)
404 klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
406 klen = callback(buf, PEM_BUFSIZE, 0, u);
408 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
411 #ifdef CHARSET_EBCDIC
412 /* Convert the pass phrase from EBCDIC */
413 ebcdic2ascii(buf, buf, klen);
416 EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
417 (unsigned char *)buf, klen, 1, key, NULL);
420 EVP_CIPHER_CTX_init(&ctx);
421 EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
422 EVP_DecryptUpdate(&ctx, data, &i, data, j);
423 o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
424 EVP_CIPHER_CTX_cleanup(&ctx);
425 OPENSSL_cleanse((char *)buf, sizeof(buf));
426 OPENSSL_cleanse((char *)key, sizeof(key));
429 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
436 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
438 const EVP_CIPHER *enc = NULL;
440 char **header_pp = &header;
442 cipher->cipher = NULL;
443 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
445 if (strncmp(header, "Proc-Type: ", 11) != 0) {
446 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
456 if (strncmp(header, "ENCRYPTED", 9) != 0) {
457 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
460 for (; (*header != '\n') && (*header != '\0'); header++) ;
461 if (*header == '\0') {
462 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
466 if (strncmp(header, "DEK-Info: ", 10) != 0) {
467 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
475 #ifndef CHARSET_EBCDIC
476 if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') ||
477 ((c >= '0') && (c <= '9'))))
480 if (!(isupper(c) || (c == '-') || isdigit(c)))
486 cipher->cipher = enc = EVP_get_cipherbyname(p);
491 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
494 if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
500 static int load_iv(char **fromp, unsigned char *to, int num)
506 for (i = 0; i < num; i++)
509 for (i = 0; i < num; i++) {
510 if ((*from >= '0') && (*from <= '9'))
512 else if ((*from >= 'A') && (*from <= 'F'))
513 v = *from - 'A' + 10;
514 else if ((*from >= 'a') && (*from <= 'f'))
515 v = *from - 'a' + 10;
517 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
521 to[i / 2] |= v << (long)((!(i & 1)) * 4);
528 #ifndef OPENSSL_NO_FP_API
529 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
535 if ((b = BIO_new(BIO_s_file())) == NULL) {
536 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
539 BIO_set_fp(b, fp, BIO_NOCLOSE);
540 ret = PEM_write_bio(b, name, header, data, len);
546 int PEM_write_bio(BIO *bp, const char *name, char *header,
547 unsigned char *data, long len)
549 int nlen, n, i, j, outl;
550 unsigned char *buf = NULL;
552 int reason = ERR_R_BUF_LIB;
554 EVP_EncodeInit(&ctx);
557 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
558 (BIO_write(bp, name, nlen) != nlen) ||
559 (BIO_write(bp, "-----\n", 6) != 6))
564 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
568 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
570 reason = ERR_R_MALLOC_FAILURE;
576 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
577 EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n);
578 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
584 EVP_EncodeFinal(&ctx, buf, &outl);
585 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
587 OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
590 if ((BIO_write(bp, "-----END ", 9) != 9) ||
591 (BIO_write(bp, name, nlen) != nlen) ||
592 (BIO_write(bp, "-----\n", 6) != 6))
597 OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
600 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
604 #ifndef OPENSSL_NO_FP_API
605 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
611 if ((b = BIO_new(BIO_s_file())) == NULL) {
612 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
615 BIO_set_fp(b, fp, BIO_NOCLOSE);
616 ret = PEM_read_bio(b, name, header, data, len);
622 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
626 int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
630 BUF_MEM *dataB, *tmpB;
632 nameB = BUF_MEM_new();
633 headerB = BUF_MEM_new();
634 dataB = BUF_MEM_new();
635 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
637 BUF_MEM_free(headerB);
639 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
645 i = BIO_gets(bp, buf, 254);
648 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE);
652 while ((i >= 0) && (buf[i] <= ' '))
657 if (strncmp(buf, "-----BEGIN ", 11) == 0) {
658 i = strlen(&(buf[11]));
660 if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
662 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);
676 headerB->data[0] = '\0';
678 i = BIO_gets(bp, buf, 254);
682 while ((i >= 0) && (buf[i] <= ' '))
689 if (!BUF_MEM_grow(headerB, hl + i + 9)) {
690 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
693 if (strncmp(buf, "-----END ", 9) == 0) {
697 memcpy(&(headerB->data[hl]), buf, i);
698 headerB->data[hl + i] = '\0';
703 if (!BUF_MEM_grow(dataB, 1024)) {
704 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
707 dataB->data[0] = '\0';
710 i = BIO_gets(bp, buf, 254);
714 while ((i >= 0) && (buf[i] <= ' '))
721 if (strncmp(buf, "-----END ", 9) == 0)
725 if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
726 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
729 memcpy(&(dataB->data[bl]), buf, i);
730 dataB->data[bl + i] = '\0';
734 i = BIO_gets(bp, buf, 254);
738 while ((i >= 0) && (buf[i] <= ' '))
752 i = strlen(nameB->data);
753 if ((strncmp(buf, "-----END ", 9) != 0) ||
754 (strncmp(nameB->data, &(buf[9]), i) != 0) ||
755 (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
756 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE);
760 EVP_DecodeInit(&ctx);
761 i = EVP_DecodeUpdate(&ctx,
762 (unsigned char *)dataB->data, &bl,
763 (unsigned char *)dataB->data, bl);
765 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
768 i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
770 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
778 *header = headerB->data;
779 *data = (unsigned char *)dataB->data;
782 OPENSSL_free(headerB);
787 BUF_MEM_free(headerB);