2 * Copyright 1995-2016 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
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)
33 #if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI)
42 i = (i > num) ? num : i;
47 #if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI)
48 PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
51 prompt = EVP_get_pw_prompt();
53 prompt = "Enter PEM pass phrase:";
57 * We assume that w == 0 means decryption,
58 * while w == 1 means encryption
60 int min_len = w ? MIN_LENGTH : 0;
62 i = EVP_read_pw_string_min(buf, min_len, num, prompt, w);
64 PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
65 memset(buf, 0, (unsigned int)num);
69 if (min_len && j < min_len) {
71 "phrase is too short, needs to be at least %d chars\n",
80 void PEM_proc_type(char *buf, int type)
84 if (type == PEM_TYPE_ENCRYPTED)
86 else if (type == PEM_TYPE_MIC_CLEAR)
88 else if (type == PEM_TYPE_MIC_ONLY)
93 OPENSSL_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
94 OPENSSL_strlcat(buf, str, PEM_BUFSIZE);
95 OPENSSL_strlcat(buf, "\n", PEM_BUFSIZE);
98 void PEM_dek_info(char *buf, const char *type, int len, char *str)
100 static const unsigned char map[17] = "0123456789ABCDEF";
104 OPENSSL_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
105 OPENSSL_strlcat(buf, type, PEM_BUFSIZE);
106 OPENSSL_strlcat(buf, ",", PEM_BUFSIZE);
108 if (j + (len * 2) + 1 > PEM_BUFSIZE)
110 for (i = 0; i < len; i++) {
111 buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
112 buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
114 buf[j + i * 2] = '\n';
115 buf[j + i * 2 + 1] = '\0';
118 #ifndef OPENSSL_NO_STDIO
119 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
120 pem_password_cb *cb, void *u)
125 if ((b = BIO_new(BIO_s_file())) == NULL) {
126 PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
129 BIO_set_fp(b, fp, BIO_NOCLOSE);
130 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
136 static int check_pem(const char *nm, const char *name)
138 /* Normal matching nm and name */
139 if (strcmp(nm, name) == 0)
142 /* Make PEM_STRING_EVP_PKEY match any private key */
144 if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) {
146 const EVP_PKEY_ASN1_METHOD *ameth;
147 if (strcmp(nm, PEM_STRING_PKCS8) == 0)
149 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0)
151 slen = pem_check_suffix(nm, "PRIVATE KEY");
154 * NB: ENGINE implementations won't contain a deprecated old
155 * private key decode function so don't look for them.
157 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
158 if (ameth && ameth->old_priv_decode)
164 if (strcmp(name, PEM_STRING_PARAMETERS) == 0) {
166 const EVP_PKEY_ASN1_METHOD *ameth;
167 slen = pem_check_suffix(nm, "PARAMETERS");
170 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
173 if (ameth->param_decode)
177 #ifndef OPENSSL_NO_ENGINE
185 /* If reading DH parameters handle X9.42 DH format too */
186 if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0
187 && strcmp(name, PEM_STRING_DHPARAMS) == 0)
190 /* Permit older strings */
192 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
193 && strcmp(name, PEM_STRING_X509) == 0)
196 if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0
197 && strcmp(name, PEM_STRING_X509_REQ) == 0)
200 /* Allow normal certs to be read as trusted certs */
201 if (strcmp(nm, PEM_STRING_X509) == 0
202 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
205 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
206 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
209 /* Some CAs use PKCS#7 with CERTIFICATE headers */
210 if (strcmp(nm, PEM_STRING_X509) == 0
211 && strcmp(name, PEM_STRING_PKCS7) == 0)
214 if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0
215 && strcmp(name, PEM_STRING_PKCS7) == 0)
218 #ifndef OPENSSL_NO_CMS
219 if (strcmp(nm, PEM_STRING_X509) == 0
220 && strcmp(name, PEM_STRING_CMS) == 0)
222 /* Allow CMS to be read from PKCS#7 headers */
223 if (strcmp(nm, PEM_STRING_PKCS7) == 0
224 && strcmp(name, PEM_STRING_CMS) == 0)
231 static void pem_free(void *p, unsigned int flags)
233 if (flags & PEM_FLAG_SECURE)
234 OPENSSL_secure_free(p);
239 static void *pem_malloc(int num, unsigned int flags)
241 return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num)
242 : OPENSSL_malloc(num);
245 static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen,
246 char **pnm, const char *name, BIO *bp,
247 pem_password_cb *cb, void *u,
250 EVP_CIPHER_INFO cipher;
251 char *nm = NULL, *header = NULL;
252 unsigned char *data = NULL;
258 pem_free(header, flags);
259 pem_free(data, flags);
260 if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) {
261 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
262 ERR_add_error_data(2, "Expecting: ", name);
265 } while (!check_pem(nm, name));
266 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
268 if (!PEM_do_header(&cipher, data, &len, cb, u))
280 if (!ret || pnm == NULL)
282 pem_free(header, flags);
284 pem_free(data, flags);
288 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
289 const char *name, BIO *bp, pem_password_cb *cb,
291 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
292 PEM_FLAG_EAY_COMPATIBLE);
295 int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm,
296 const char *name, BIO *bp, pem_password_cb *cb,
298 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
299 PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE);
302 #ifndef OPENSSL_NO_STDIO
303 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
304 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
305 int klen, pem_password_cb *callback, void *u)
310 if ((b = BIO_new(BIO_s_file())) == NULL) {
311 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
314 BIO_set_fp(b, fp, BIO_NOCLOSE);
315 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
321 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
322 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
323 int klen, pem_password_cb *callback, void *u)
325 EVP_CIPHER_CTX *ctx = NULL;
326 int dsize = 0, i = 0, j = 0, ret = 0;
327 unsigned char *p, *data = NULL;
328 const char *objstr = NULL;
329 char buf[PEM_BUFSIZE];
330 unsigned char key[EVP_MAX_KEY_LENGTH];
331 unsigned char iv[EVP_MAX_IV_LENGTH];
334 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
335 if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0) {
336 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
341 if ((dsize = i2d(x, NULL)) < 0) {
342 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
346 /* dsize + 8 bytes are needed */
347 /* actually it needs the cipher block size extra... */
348 data = OPENSSL_malloc((unsigned int)dsize + 20);
350 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
358 if (callback == NULL)
359 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
361 klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
363 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
366 #ifdef CHARSET_EBCDIC
367 /* Convert the pass phrase from EBCDIC */
368 ebcdic2ascii(buf, buf, klen);
370 kstr = (unsigned char *)buf;
372 RAND_add(data, i, 0); /* put in the RSA key. */
373 OPENSSL_assert(EVP_CIPHER_iv_length(enc) <= (int)sizeof(iv));
374 if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
377 * The 'iv' is used as the iv and as a salt. It is NOT taken from
378 * the BytesToKey function
380 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
383 if (kstr == (unsigned char *)buf)
384 OPENSSL_cleanse(buf, PEM_BUFSIZE);
386 OPENSSL_assert(strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13
390 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
391 PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
395 if ((ctx = EVP_CIPHER_CTX_new()) == NULL
396 || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
397 || !EVP_EncryptUpdate(ctx, data, &j, data, i)
398 || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
407 i = PEM_write_bio(bp, name, buf, data, i);
411 OPENSSL_cleanse(key, sizeof(key));
412 OPENSSL_cleanse(iv, sizeof(iv));
413 EVP_CIPHER_CTX_free(ctx);
414 OPENSSL_cleanse(buf, PEM_BUFSIZE);
415 OPENSSL_clear_free(data, (unsigned int)dsize);
419 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
420 pem_password_cb *callback, void *u)
425 int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
427 unsigned char key[EVP_MAX_KEY_LENGTH];
428 char buf[PEM_BUFSIZE];
430 #if LONG_MAX > INT_MAX
431 /* Check that we did not truncate the length */
433 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
438 if (cipher->cipher == NULL)
440 if (callback == NULL)
441 keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
443 keylen = callback(buf, PEM_BUFSIZE, 0, u);
445 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
448 #ifdef CHARSET_EBCDIC
449 /* Convert the pass phrase from EBCDIC */
450 ebcdic2ascii(buf, buf, keylen);
453 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
454 (unsigned char *)buf, keylen, 1, key, NULL))
457 ctx = EVP_CIPHER_CTX_new();
461 ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
463 ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
465 /* Squirrel away the length of data decrypted so far. */
467 ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
472 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
474 EVP_CIPHER_CTX_free(ctx);
475 OPENSSL_cleanse((char *)buf, sizeof(buf));
476 OPENSSL_cleanse((char *)key, sizeof(key));
481 * This implements a very limited PEM header parser that does not support the
482 * full grammar of rfc1421. In particular, folded headers are not supported,
483 * nor is additional whitespace.
485 * A robust implementation would make use of a library that turns the headers
486 * into a BIO from which one folded line is read at a time, and is then split
487 * into a header label and content. We would then parse the content of the
488 * headers we care about. This is overkill for just this limited use-case, but
489 * presumably we also parse rfc822-style headers for S/MIME, so a common
490 * abstraction might well be more generally useful.
492 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
494 static const char ProcType[] = "Proc-Type:";
495 static const char ENCRYPTED[] = "ENCRYPTED";
496 static const char DEKInfo[] = "DEK-Info:";
497 const EVP_CIPHER *enc = NULL;
499 char *dekinfostart, c;
501 cipher->cipher = NULL;
502 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
505 if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
506 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
509 header += sizeof(ProcType)-1;
510 header += strspn(header, " \t");
512 if (*header++ != '4' || *header++ != ',')
514 header += strspn(header, " \t");
516 /* We expect "ENCRYPTED" followed by optional white-space + line break */
517 if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
518 strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
519 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
522 header += sizeof(ENCRYPTED)-1;
523 header += strspn(header, " \t\r");
524 if (*header++ != '\n') {
525 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
530 * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
531 * We expect "DEK-Info: algo[,hex-parameters]"
533 if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
534 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
537 header += sizeof(DEKInfo)-1;
538 header += strspn(header, " \t");
541 * DEK-INFO is a comma-separated combination of algorithm name and optional
544 dekinfostart = header;
545 header += strcspn(header, " \t,");
548 cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
550 header += strspn(header, " \t");
553 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
556 ivlen = EVP_CIPHER_iv_length(enc);
557 if (ivlen > 0 && *header++ != ',') {
558 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
560 } else if (ivlen == 0 && *header == ',') {
561 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
565 if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
571 static int load_iv(char **fromp, unsigned char *to, int num)
577 for (i = 0; i < num; i++)
580 for (i = 0; i < num; i++) {
581 v = OPENSSL_hexchar2int(*from);
583 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
587 to[i / 2] |= v << (long)((!(i & 1)) * 4);
594 #ifndef OPENSSL_NO_STDIO
595 int PEM_write(FILE *fp, const char *name, const char *header,
596 const unsigned char *data, long len)
601 if ((b = BIO_new(BIO_s_file())) == NULL) {
602 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
605 BIO_set_fp(b, fp, BIO_NOCLOSE);
606 ret = PEM_write_bio(b, name, header, data, len);
612 int PEM_write_bio(BIO *bp, const char *name, const char *header,
613 const unsigned char *data, long len)
615 int nlen, n, i, j, outl;
616 unsigned char *buf = NULL;
617 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
618 int reason = ERR_R_BUF_LIB;
621 reason = ERR_R_MALLOC_FAILURE;
628 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
629 (BIO_write(bp, name, nlen) != nlen) ||
630 (BIO_write(bp, "-----\n", 6) != 6))
635 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
639 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
641 reason = ERR_R_MALLOC_FAILURE;
647 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
648 if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
650 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
656 EVP_EncodeFinal(ctx, buf, &outl);
657 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
659 if ((BIO_write(bp, "-----END ", 9) != 9) ||
660 (BIO_write(bp, name, nlen) != nlen) ||
661 (BIO_write(bp, "-----\n", 6) != 6))
663 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
664 EVP_ENCODE_CTX_free(ctx);
667 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
668 EVP_ENCODE_CTX_free(ctx);
669 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
673 #ifndef OPENSSL_NO_STDIO
674 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
680 if ((b = BIO_new(BIO_s_file())) == NULL) {
681 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
684 BIO_set_fp(b, fp, BIO_NOCLOSE);
685 ret = PEM_read_bio(b, name, header, data, len);
691 /* Some helpers for PEM_read_bio_ex(). */
693 #define isb64(c) (isalnum(c) || (c) == '+' || (c) == '/' || (c) == '=')
695 static int sanitize_line(char *linebuf, int len, unsigned int flags)
699 if (flags & PEM_FLAG_EAY_COMPATIBLE) {
700 /* Strip trailing whitespace */
701 while ((len >= 0) && (linebuf[len] <= ' '))
703 /* Go back to whitespace before applying uniform line ending. */
705 } else if (flags & PEM_FLAG_ONLY_B64) {
706 for (i = 0; i < len; ++i) {
707 if (!isb64(linebuf[i]) || linebuf[i] == '\n' || linebuf[i] == '\r')
712 /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip
713 * control characters in-place and let everything through. */
714 for (i = 0; i < len; ++i) {
715 if (linebuf[i] == '\n' || linebuf[i] == '\r')
717 if (iscntrl(linebuf[i]))
722 /* The caller allocated LINESIZE+1, so this is safe. */
723 linebuf[len++] = '\n';
729 /* Note trailing spaces for begin and end. */
730 static const char beginstr[] = "-----BEGIN ";
731 static const char endstr[] = "-----END ";
732 static const char tailstr[] = "-----\n";
733 #define BEGINLEN (sizeof(beginstr) - 1)
734 #define ENDLEN (sizeof(endstr) - 1)
735 #define TAILLEN (sizeof(tailstr) - 1)
736 static int get_name(BIO *bp, char **name, unsigned int flags)
743 * Need to hold trailing NUL (accounted for by BIO_gets() and the newline
744 * that will be added by sanitize_line() (the extra '1').
746 linebuf = pem_malloc(LINESIZE + 1, flags);
747 if (linebuf == NULL) {
748 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
753 len = BIO_gets(bp, linebuf, LINESIZE);
756 PEMerr(PEM_F_GET_NAME, PEM_R_NO_START_LINE);
760 /* Strip trailing garbage and standardize ending. */
761 len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64);
763 /* Allow leading empty or non-matching lines. */
764 } while (strncmp(linebuf, beginstr, BEGINLEN) != 0
766 || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0);
767 linebuf[len - TAILLEN] = '\0';
768 len = len - BEGINLEN - TAILLEN + 1;
769 *name = pem_malloc(len, flags);
771 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
774 memcpy(*name, linebuf + BEGINLEN, len);
778 pem_free(linebuf, flags);
782 /* Keep track of how much of a header we've seen. */
790 * Extract the optional PEM header, with details on the type of content and
791 * any encryption used on the contents, and the bulk of the data from the bio.
792 * The end of the header is marked by a blank line; if the end-of-input marker
793 * is reached prior to a blank line, there is no header.
795 * The header and data arguments are BIO** since we may have to swap them
796 * if there is no header, for efficiency.
798 * We need the name of the PEM-encoded type to verify the end string.
800 static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name,
805 int len, line, ret = 0, end = 0;
806 /* 0 if not seen (yet), 1 if reading header, 2 if finished header */
807 enum header_status got_header = MAYBE_HEADER;
808 unsigned int flags_mask;
811 /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline
812 * that will be added by sanitize_line() (the extra '1'). */
813 linebuf = pem_malloc(LINESIZE + 1, flags);
814 if (linebuf == NULL) {
815 PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE);
819 for (line = 0; ; line++) {
821 len = BIO_gets(bp, linebuf, LINESIZE);
823 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_SHORT_HEADER);
827 if (got_header == MAYBE_HEADER) {
828 if (memchr(linebuf, ':', len) != NULL)
829 got_header = IN_HEADER;
831 if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER)
832 flags_mask &= ~PEM_FLAG_ONLY_B64;
833 len = sanitize_line(linebuf, len, flags & flags_mask);
835 /* Check for end of header. */
836 if (linebuf[0] == '\n') {
837 if (got_header == POST_HEADER) {
838 /* Another blank line is an error. */
839 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
842 got_header = POST_HEADER;
847 /* Check for end of stream (which means there is no header). */
848 if (strncmp(linebuf, endstr, ENDLEN) == 0) {
849 p = linebuf + ENDLEN;
850 namelen = strlen(name);
851 if (strncmp(p, name, namelen) != 0 ||
852 strncmp(p + namelen, tailstr, TAILLEN) != 0) {
853 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
856 if (got_header == MAYBE_HEADER) {
862 /* Malformed input; short line not at end of data. */
863 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
867 * Else, a line of text -- could be header or data; we don't
868 * know yet. Just pass it through.
870 BIO_puts(tmp, linebuf);
872 * Only encrypted files need the line length check applied.
874 if (got_header == POST_HEADER) {
875 /* 65 includes the trailing newline */
885 pem_free(linebuf, flags);
890 * Read in PEM-formatted data from the given BIO.
892 * By nature of the PEM format, all content must be printable ASCII (except
893 * for line endings). Other characters, or lines that are longer than 80
894 * characters, are malformed input and will be rejected.
896 int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
897 unsigned char **data, long *len_out, unsigned int flags)
899 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
900 const BIO_METHOD *bmeth;
901 BIO *headerB = NULL, *dataB = NULL;
903 int len, taillen, headerlen, ret = 0;
907 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
912 *name_out = *header = NULL;
914 if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
915 /* These two are mutually incompatible; bail out. */
916 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT);
919 bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
921 headerB = BIO_new(bmeth);
922 dataB = BIO_new(bmeth);
923 if (headerB == NULL || dataB == NULL) {
924 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
928 if (!get_name(bp, &name, flags))
930 if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
934 BIO_get_mem_ptr(dataB, &buf_mem);
935 len = buf_mem->length;
936 if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
937 (unsigned char*)buf_mem->data, len) < 0
938 || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
940 PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE);
944 buf_mem->length = len;
946 /* There was no data in the PEM file; avoid malloc(0). */
949 headerlen = BIO_get_mem_data(headerB, NULL);
950 *header = pem_malloc(headerlen + 1, flags);
951 *data = pem_malloc(len, flags);
952 if (*header == NULL || *data == NULL) {
953 pem_free(*header, flags);
954 pem_free(*data, flags);
957 BIO_read(headerB, *header, headerlen);
958 (*header)[headerlen] = '\0';
959 BIO_read(dataB, *data, len);
966 EVP_ENCODE_CTX_free(ctx);
967 pem_free(name, flags);
973 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
976 return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE);
980 * Check pem string and return prefix length. If for example the pem_str ==
981 * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
985 int pem_check_suffix(const char *pem_str, const char *suffix)
987 int pem_len = strlen(pem_str);
988 int suffix_len = strlen(suffix);
990 if (suffix_len + 1 >= pem_len)
992 p = pem_str + pem_len - suffix_len;
993 if (strcmp(p, suffix))