2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/ctype.h"
13 #include "internal/cryptlib.h"
14 #include <openssl/buffer.h>
15 #include <openssl/objects.h>
16 #include <openssl/evp.h>
17 #include <openssl/rand.h>
18 #include <openssl/x509.h>
19 #include <openssl/pem.h>
20 #include <openssl/pkcs12.h>
21 #include "internal/asn1_int.h"
22 #include <openssl/des.h>
23 #include <openssl/engine.h>
27 static int load_iv(char **fromp, unsigned char *to, int num);
28 static int check_pem(const char *nm, const char *name);
29 int pem_check_suffix(const char *pem_str, const char *suffix);
31 int PEM_def_callback(char *buf, int num, int w, void *key)
38 i = (i > num) ? num : i;
43 prompt = EVP_get_pw_prompt();
45 prompt = "Enter PEM pass phrase:";
48 * We assume that w == 0 means decryption,
49 * while w == 1 means encryption
51 min_len = w ? MIN_LENGTH : 0;
53 i = EVP_read_pw_string_min(buf, min_len, num, prompt, w);
55 PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
56 memset(buf, 0, (unsigned int)num);
62 void PEM_proc_type(char *buf, int type)
65 char *p = buf + strlen(buf);
67 if (type == PEM_TYPE_ENCRYPTED)
69 else if (type == PEM_TYPE_MIC_CLEAR)
71 else if (type == PEM_TYPE_MIC_ONLY)
76 BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str);
79 void PEM_dek_info(char *buf, const char *type, int len, char *str)
82 char *p = buf + strlen(buf);
83 int j = PEM_BUFSIZE - (size_t)(p - buf), n;
85 n = BIO_snprintf(p, j, "DEK-Info: %s,", type);
89 for (i = 0; i < len; i++) {
90 n = BIO_snprintf(p, j, "%02X", 0xff & str[i]);
101 #ifndef OPENSSL_NO_STDIO
102 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
103 pem_password_cb *cb, void *u)
108 if ((b = BIO_new(BIO_s_file())) == NULL) {
109 PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
112 BIO_set_fp(b, fp, BIO_NOCLOSE);
113 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
119 static int check_pem(const char *nm, const char *name)
121 /* Normal matching nm and name */
122 if (strcmp(nm, name) == 0)
125 /* Make PEM_STRING_EVP_PKEY match any private key */
127 if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) {
129 const EVP_PKEY_ASN1_METHOD *ameth;
130 if (strcmp(nm, PEM_STRING_PKCS8) == 0)
132 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0)
134 slen = pem_check_suffix(nm, "PRIVATE KEY");
137 * NB: ENGINE implementations won't contain a deprecated old
138 * private key decode function so don't look for them.
140 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
141 if (ameth && ameth->old_priv_decode)
147 if (strcmp(name, PEM_STRING_PARAMETERS) == 0) {
149 const EVP_PKEY_ASN1_METHOD *ameth;
150 slen = pem_check_suffix(nm, "PARAMETERS");
153 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
156 if (ameth->param_decode)
160 #ifndef OPENSSL_NO_ENGINE
168 /* If reading DH parameters handle X9.42 DH format too */
169 if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0
170 && strcmp(name, PEM_STRING_DHPARAMS) == 0)
173 /* Permit older strings */
175 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
176 && strcmp(name, PEM_STRING_X509) == 0)
179 if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0
180 && strcmp(name, PEM_STRING_X509_REQ) == 0)
183 /* Allow normal certs to be read as trusted certs */
184 if (strcmp(nm, PEM_STRING_X509) == 0
185 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
188 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
189 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
192 /* Some CAs use PKCS#7 with CERTIFICATE headers */
193 if (strcmp(nm, PEM_STRING_X509) == 0
194 && strcmp(name, PEM_STRING_PKCS7) == 0)
197 if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0
198 && strcmp(name, PEM_STRING_PKCS7) == 0)
201 #ifndef OPENSSL_NO_CMS
202 if (strcmp(nm, PEM_STRING_X509) == 0
203 && strcmp(name, PEM_STRING_CMS) == 0)
205 /* Allow CMS to be read from PKCS#7 headers */
206 if (strcmp(nm, PEM_STRING_PKCS7) == 0
207 && strcmp(name, PEM_STRING_CMS) == 0)
214 static void pem_free(void *p, unsigned int flags, size_t num)
216 if (flags & PEM_FLAG_SECURE)
217 OPENSSL_secure_clear_free(p, num);
222 static void *pem_malloc(int num, unsigned int flags)
224 return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num)
225 : OPENSSL_malloc(num);
228 static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen,
229 char **pnm, const char *name, BIO *bp,
230 pem_password_cb *cb, void *u,
233 EVP_CIPHER_INFO cipher;
234 char *nm = NULL, *header = NULL;
235 unsigned char *data = NULL;
240 pem_free(nm, flags, 0);
241 pem_free(header, flags, 0);
242 pem_free(data, flags, len);
243 if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) {
244 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
245 ERR_add_error_data(2, "Expecting: ", name);
248 } while (!check_pem(nm, name));
249 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
251 if (!PEM_do_header(&cipher, data, &len, cb, u))
263 if (!ret || pnm == NULL)
264 pem_free(nm, flags, 0);
265 pem_free(header, flags, 0);
267 pem_free(data, flags, len);
271 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
272 const char *name, BIO *bp, pem_password_cb *cb,
274 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
275 PEM_FLAG_EAY_COMPATIBLE);
278 int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm,
279 const char *name, BIO *bp, pem_password_cb *cb,
281 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
282 PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE);
285 #ifndef OPENSSL_NO_STDIO
286 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
287 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
288 int klen, pem_password_cb *callback, void *u)
293 if ((b = BIO_new(BIO_s_file())) == NULL) {
294 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
297 BIO_set_fp(b, fp, BIO_NOCLOSE);
298 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
304 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
305 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
306 int klen, pem_password_cb *callback, void *u)
308 EVP_CIPHER_CTX *ctx = NULL;
309 int dsize = 0, i = 0, j = 0, ret = 0;
310 unsigned char *p, *data = NULL;
311 const char *objstr = NULL;
312 char buf[PEM_BUFSIZE];
313 unsigned char key[EVP_MAX_KEY_LENGTH];
314 unsigned char iv[EVP_MAX_IV_LENGTH];
317 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
318 if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0
319 || EVP_CIPHER_iv_length(enc) > (int)sizeof(iv)
321 * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
324 || (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13)
326 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
331 if ((dsize = i2d(x, NULL)) < 0) {
332 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
336 /* dsize + 8 bytes are needed */
337 /* actually it needs the cipher block size extra... */
338 data = OPENSSL_malloc((unsigned int)dsize + 20);
340 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
348 if (callback == NULL)
349 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
351 klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
353 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
356 #ifdef CHARSET_EBCDIC
357 /* Convert the pass phrase from EBCDIC */
358 ebcdic2ascii(buf, buf, klen);
360 kstr = (unsigned char *)buf;
362 if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
365 * The 'iv' is used as the iv and as a salt. It is NOT taken from
366 * the BytesToKey function
368 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
371 if (kstr == (unsigned char *)buf)
372 OPENSSL_cleanse(buf, PEM_BUFSIZE);
375 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
376 PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
380 if ((ctx = EVP_CIPHER_CTX_new()) == NULL
381 || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
382 || !EVP_EncryptUpdate(ctx, data, &j, data, i)
383 || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
392 i = PEM_write_bio(bp, name, buf, data, i);
396 OPENSSL_cleanse(key, sizeof(key));
397 OPENSSL_cleanse(iv, sizeof(iv));
398 EVP_CIPHER_CTX_free(ctx);
399 OPENSSL_cleanse(buf, PEM_BUFSIZE);
400 OPENSSL_clear_free(data, (unsigned int)dsize);
404 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
405 pem_password_cb *callback, void *u)
410 int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
412 unsigned char key[EVP_MAX_KEY_LENGTH];
413 char buf[PEM_BUFSIZE];
415 #if LONG_MAX > INT_MAX
416 /* Check that we did not truncate the length */
418 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
423 if (cipher->cipher == NULL)
425 if (callback == NULL)
426 keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
428 keylen = callback(buf, PEM_BUFSIZE, 0, u);
430 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
433 #ifdef CHARSET_EBCDIC
434 /* Convert the pass phrase from EBCDIC */
435 ebcdic2ascii(buf, buf, keylen);
438 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
439 (unsigned char *)buf, keylen, 1, key, NULL))
442 ctx = EVP_CIPHER_CTX_new();
446 ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
448 ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
450 /* Squirrel away the length of data decrypted so far. */
452 ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
457 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
459 EVP_CIPHER_CTX_free(ctx);
460 OPENSSL_cleanse((char *)buf, sizeof(buf));
461 OPENSSL_cleanse((char *)key, sizeof(key));
466 * This implements a very limited PEM header parser that does not support the
467 * full grammar of rfc1421. In particular, folded headers are not supported,
468 * nor is additional whitespace.
470 * A robust implementation would make use of a library that turns the headers
471 * into a BIO from which one folded line is read at a time, and is then split
472 * into a header label and content. We would then parse the content of the
473 * headers we care about. This is overkill for just this limited use-case, but
474 * presumably we also parse rfc822-style headers for S/MIME, so a common
475 * abstraction might well be more generally useful.
477 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
479 static const char ProcType[] = "Proc-Type:";
480 static const char ENCRYPTED[] = "ENCRYPTED";
481 static const char DEKInfo[] = "DEK-Info:";
482 const EVP_CIPHER *enc = NULL;
484 char *dekinfostart, c;
486 cipher->cipher = NULL;
487 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
490 if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
491 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
494 header += sizeof(ProcType)-1;
495 header += strspn(header, " \t");
497 if (*header++ != '4' || *header++ != ',')
499 header += strspn(header, " \t");
501 /* We expect "ENCRYPTED" followed by optional white-space + line break */
502 if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
503 strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
504 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
507 header += sizeof(ENCRYPTED)-1;
508 header += strspn(header, " \t\r");
509 if (*header++ != '\n') {
510 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
515 * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
516 * We expect "DEK-Info: algo[,hex-parameters]"
518 if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
519 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
522 header += sizeof(DEKInfo)-1;
523 header += strspn(header, " \t");
526 * DEK-INFO is a comma-separated combination of algorithm name and optional
529 dekinfostart = header;
530 header += strcspn(header, " \t,");
533 cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
535 header += strspn(header, " \t");
538 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
541 ivlen = EVP_CIPHER_iv_length(enc);
542 if (ivlen > 0 && *header++ != ',') {
543 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
545 } else if (ivlen == 0 && *header == ',') {
546 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
550 if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
556 static int load_iv(char **fromp, unsigned char *to, int num)
562 for (i = 0; i < num; i++)
565 for (i = 0; i < num; i++) {
566 v = OPENSSL_hexchar2int(*from);
568 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
572 to[i / 2] |= v << (long)((!(i & 1)) * 4);
579 #ifndef OPENSSL_NO_STDIO
580 int PEM_write(FILE *fp, const char *name, const char *header,
581 const unsigned char *data, long len)
586 if ((b = BIO_new(BIO_s_file())) == NULL) {
587 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
590 BIO_set_fp(b, fp, BIO_NOCLOSE);
591 ret = PEM_write_bio(b, name, header, data, len);
597 int PEM_write_bio(BIO *bp, const char *name, const char *header,
598 const unsigned char *data, long len)
600 int nlen, n, i, j, outl;
601 unsigned char *buf = NULL;
602 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
603 int reason = ERR_R_BUF_LIB;
607 reason = ERR_R_MALLOC_FAILURE;
614 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
615 (BIO_write(bp, name, nlen) != nlen) ||
616 (BIO_write(bp, "-----\n", 6) != 6))
621 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
625 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
627 reason = ERR_R_MALLOC_FAILURE;
633 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
634 if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
636 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
642 EVP_EncodeFinal(ctx, buf, &outl);
643 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
645 if ((BIO_write(bp, "-----END ", 9) != 9) ||
646 (BIO_write(bp, name, nlen) != nlen) ||
647 (BIO_write(bp, "-----\n", 6) != 6))
653 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
654 EVP_ENCODE_CTX_free(ctx);
655 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
659 #ifndef OPENSSL_NO_STDIO
660 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
666 if ((b = BIO_new(BIO_s_file())) == NULL) {
667 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
670 BIO_set_fp(b, fp, BIO_NOCLOSE);
671 ret = PEM_read_bio(b, name, header, data, len);
677 /* Some helpers for PEM_read_bio_ex(). */
678 static int sanitize_line(char *linebuf, int len, unsigned int flags)
682 if (flags & PEM_FLAG_EAY_COMPATIBLE) {
683 /* Strip trailing whitespace */
684 while ((len >= 0) && (linebuf[len] <= ' '))
686 /* Go back to whitespace before applying uniform line ending. */
688 } else if (flags & PEM_FLAG_ONLY_B64) {
689 for (i = 0; i < len; ++i) {
690 if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n'
691 || linebuf[i] == '\r')
696 /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip
697 * control characters in-place and let everything through. */
698 for (i = 0; i < len; ++i) {
699 if (linebuf[i] == '\n' || linebuf[i] == '\r')
701 if (ossl_iscntrl(linebuf[i]))
706 /* The caller allocated LINESIZE+1, so this is safe. */
707 linebuf[len++] = '\n';
713 /* Note trailing spaces for begin and end. */
714 static const char beginstr[] = "-----BEGIN ";
715 static const char endstr[] = "-----END ";
716 static const char tailstr[] = "-----\n";
717 #define BEGINLEN ((int)(sizeof(beginstr) - 1))
718 #define ENDLEN ((int)(sizeof(endstr) - 1))
719 #define TAILLEN ((int)(sizeof(tailstr) - 1))
720 static int get_name(BIO *bp, char **name, unsigned int flags)
727 * Need to hold trailing NUL (accounted for by BIO_gets() and the newline
728 * that will be added by sanitize_line() (the extra '1').
730 linebuf = pem_malloc(LINESIZE + 1, flags);
731 if (linebuf == NULL) {
732 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
737 len = BIO_gets(bp, linebuf, LINESIZE);
740 PEMerr(PEM_F_GET_NAME, PEM_R_NO_START_LINE);
744 /* Strip trailing garbage and standardize ending. */
745 len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64);
747 /* Allow leading empty or non-matching lines. */
748 } while (strncmp(linebuf, beginstr, BEGINLEN) != 0
750 || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0);
751 linebuf[len - TAILLEN] = '\0';
752 len = len - BEGINLEN - TAILLEN + 1;
753 *name = pem_malloc(len, flags);
755 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
758 memcpy(*name, linebuf + BEGINLEN, len);
762 pem_free(linebuf, flags, LINESIZE + 1);
766 /* Keep track of how much of a header we've seen. */
774 * Extract the optional PEM header, with details on the type of content and
775 * any encryption used on the contents, and the bulk of the data from the bio.
776 * The end of the header is marked by a blank line; if the end-of-input marker
777 * is reached prior to a blank line, there is no header.
779 * The header and data arguments are BIO** since we may have to swap them
780 * if there is no header, for efficiency.
782 * We need the name of the PEM-encoded type to verify the end string.
784 static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name,
789 int len, line, ret = 0, end = 0;
790 /* 0 if not seen (yet), 1 if reading header, 2 if finished header */
791 enum header_status got_header = MAYBE_HEADER;
792 unsigned int flags_mask;
795 /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline
796 * that will be added by sanitize_line() (the extra '1'). */
797 linebuf = pem_malloc(LINESIZE + 1, flags);
798 if (linebuf == NULL) {
799 PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE);
803 for (line = 0; ; line++) {
805 len = BIO_gets(bp, linebuf, LINESIZE);
807 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_SHORT_HEADER);
811 if (got_header == MAYBE_HEADER) {
812 if (memchr(linebuf, ':', len) != NULL)
813 got_header = IN_HEADER;
815 if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER)
816 flags_mask &= ~PEM_FLAG_ONLY_B64;
817 len = sanitize_line(linebuf, len, flags & flags_mask);
819 /* Check for end of header. */
820 if (linebuf[0] == '\n') {
821 if (got_header == POST_HEADER) {
822 /* Another blank line is an error. */
823 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
826 got_header = POST_HEADER;
831 /* Check for end of stream (which means there is no header). */
832 if (strncmp(linebuf, endstr, ENDLEN) == 0) {
833 p = linebuf + ENDLEN;
834 namelen = strlen(name);
835 if (strncmp(p, name, namelen) != 0 ||
836 strncmp(p + namelen, tailstr, TAILLEN) != 0) {
837 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
840 if (got_header == MAYBE_HEADER) {
846 /* Malformed input; short line not at end of data. */
847 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
851 * Else, a line of text -- could be header or data; we don't
852 * know yet. Just pass it through.
854 if (BIO_puts(tmp, linebuf) < 0)
857 * Only encrypted files need the line length check applied.
859 if (got_header == POST_HEADER) {
860 /* 65 includes the trailing newline */
870 pem_free(linebuf, flags, LINESIZE + 1);
875 * Read in PEM-formatted data from the given BIO.
877 * By nature of the PEM format, all content must be printable ASCII (except
878 * for line endings). Other characters, or lines that are longer than 80
879 * characters, are malformed input and will be rejected.
881 int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
882 unsigned char **data, long *len_out, unsigned int flags)
884 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
885 const BIO_METHOD *bmeth;
886 BIO *headerB = NULL, *dataB = NULL;
888 int len, taillen, headerlen, ret = 0;
892 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
897 *name_out = *header = NULL;
899 if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
900 /* These two are mutually incompatible; bail out. */
901 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT);
904 bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
906 headerB = BIO_new(bmeth);
907 dataB = BIO_new(bmeth);
908 if (headerB == NULL || dataB == NULL) {
909 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
913 if (!get_name(bp, &name, flags))
915 if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
919 BIO_get_mem_ptr(dataB, &buf_mem);
920 len = buf_mem->length;
921 if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
922 (unsigned char*)buf_mem->data, len) < 0
923 || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
925 PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE);
929 buf_mem->length = len;
931 /* There was no data in the PEM file; avoid malloc(0). */
934 headerlen = BIO_get_mem_data(headerB, NULL);
935 *header = pem_malloc(headerlen + 1, flags);
936 *data = pem_malloc(len, flags);
937 if (*header == NULL || *data == NULL) {
938 pem_free(*header, flags, 0);
939 pem_free(*data, flags, 0);
942 BIO_read(headerB, *header, headerlen);
943 (*header)[headerlen] = '\0';
944 BIO_read(dataB, *data, len);
951 EVP_ENCODE_CTX_free(ctx);
952 pem_free(name, flags, 0);
958 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
961 return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE);
965 * Check pem string and return prefix length. If for example the pem_str ==
966 * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
970 int pem_check_suffix(const char *pem_str, const char *suffix)
972 int pem_len = strlen(pem_str);
973 int suffix_len = strlen(suffix);
975 if (suffix_len + 1 >= pem_len)
977 p = pem_str + pem_len - suffix_len;
978 if (strcmp(p, suffix))