2 * Copyright 1995-2017 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:";
49 * We assume that w == 0 means decryption,
50 * while w == 1 means encryption
52 int min_len = w ? MIN_LENGTH : 0;
54 i = EVP_read_pw_string_min(buf, min_len, num, prompt, w);
56 PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
57 memset(buf, 0, (unsigned int)num);
61 if (min_len && j < min_len) {
63 "phrase is too short, needs to be at least %d chars\n",
71 void PEM_proc_type(char *buf, int type)
74 char *p = buf + strlen(buf);
76 if (type == PEM_TYPE_ENCRYPTED)
78 else if (type == PEM_TYPE_MIC_CLEAR)
80 else if (type == PEM_TYPE_MIC_ONLY)
85 BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str);
88 void PEM_dek_info(char *buf, const char *type, int len, char *str)
91 char *p = buf + strlen(buf);
92 int j = PEM_BUFSIZE - (size_t)(p - buf), n;
94 n = BIO_snprintf(p, j, "DEK-Info: %s,", type);
98 for (i = 0; i < len; i++) {
99 n = BIO_snprintf(p, j, "%02X", 0xff & str[i]);
110 #ifndef OPENSSL_NO_STDIO
111 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
112 pem_password_cb *cb, void *u)
117 if ((b = BIO_new(BIO_s_file())) == NULL) {
118 PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
121 BIO_set_fp(b, fp, BIO_NOCLOSE);
122 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
128 static int check_pem(const char *nm, const char *name)
130 /* Normal matching nm and name */
131 if (strcmp(nm, name) == 0)
134 /* Make PEM_STRING_EVP_PKEY match any private key */
136 if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) {
138 const EVP_PKEY_ASN1_METHOD *ameth;
139 if (strcmp(nm, PEM_STRING_PKCS8) == 0)
141 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0)
143 slen = pem_check_suffix(nm, "PRIVATE KEY");
146 * NB: ENGINE implementations won't contain a deprecated old
147 * private key decode function so don't look for them.
149 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
150 if (ameth && ameth->old_priv_decode)
156 if (strcmp(name, PEM_STRING_PARAMETERS) == 0) {
158 const EVP_PKEY_ASN1_METHOD *ameth;
159 slen = pem_check_suffix(nm, "PARAMETERS");
162 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
165 if (ameth->param_decode)
169 #ifndef OPENSSL_NO_ENGINE
177 /* If reading DH parameters handle X9.42 DH format too */
178 if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0
179 && strcmp(name, PEM_STRING_DHPARAMS) == 0)
182 /* Permit older strings */
184 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
185 && strcmp(name, PEM_STRING_X509) == 0)
188 if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0
189 && strcmp(name, PEM_STRING_X509_REQ) == 0)
192 /* Allow normal certs to be read as trusted certs */
193 if (strcmp(nm, PEM_STRING_X509) == 0
194 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
197 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
198 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
201 /* Some CAs use PKCS#7 with CERTIFICATE headers */
202 if (strcmp(nm, PEM_STRING_X509) == 0
203 && strcmp(name, PEM_STRING_PKCS7) == 0)
206 if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0
207 && strcmp(name, PEM_STRING_PKCS7) == 0)
210 #ifndef OPENSSL_NO_CMS
211 if (strcmp(nm, PEM_STRING_X509) == 0
212 && strcmp(name, PEM_STRING_CMS) == 0)
214 /* Allow CMS to be read from PKCS#7 headers */
215 if (strcmp(nm, PEM_STRING_PKCS7) == 0
216 && strcmp(name, PEM_STRING_CMS) == 0)
223 static void pem_free(void *p, unsigned int flags, size_t num)
225 if (flags & PEM_FLAG_SECURE)
226 OPENSSL_secure_clear_free(p, num);
231 static void *pem_malloc(int num, unsigned int flags)
233 return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num)
234 : OPENSSL_malloc(num);
237 static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen,
238 char **pnm, const char *name, BIO *bp,
239 pem_password_cb *cb, void *u,
242 EVP_CIPHER_INFO cipher;
243 char *nm = NULL, *header = NULL;
244 unsigned char *data = NULL;
249 pem_free(nm, flags, 0);
250 pem_free(header, flags, 0);
251 pem_free(data, flags, len);
252 if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) {
253 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
254 ERR_add_error_data(2, "Expecting: ", name);
257 } while (!check_pem(nm, name));
258 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
260 if (!PEM_do_header(&cipher, data, &len, cb, u))
272 if (!ret || pnm == NULL)
273 pem_free(nm, flags, 0);
274 pem_free(header, flags, 0);
276 pem_free(data, flags, len);
280 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
281 const char *name, BIO *bp, pem_password_cb *cb,
283 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
284 PEM_FLAG_EAY_COMPATIBLE);
287 int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm,
288 const char *name, BIO *bp, pem_password_cb *cb,
290 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
291 PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE);
294 #ifndef OPENSSL_NO_STDIO
295 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
296 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
297 int klen, pem_password_cb *callback, void *u)
302 if ((b = BIO_new(BIO_s_file())) == NULL) {
303 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
306 BIO_set_fp(b, fp, BIO_NOCLOSE);
307 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
313 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
314 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
315 int klen, pem_password_cb *callback, void *u)
317 EVP_CIPHER_CTX *ctx = NULL;
318 int dsize = 0, i = 0, j = 0, ret = 0;
319 unsigned char *p, *data = NULL;
320 const char *objstr = NULL;
321 char buf[PEM_BUFSIZE];
322 unsigned char key[EVP_MAX_KEY_LENGTH];
323 unsigned char iv[EVP_MAX_IV_LENGTH];
326 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
327 if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0
328 || EVP_CIPHER_iv_length(enc) > (int)sizeof(iv)
330 * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
333 || (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13)
335 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
340 if ((dsize = i2d(x, NULL)) < 0) {
341 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
345 /* dsize + 8 bytes are needed */
346 /* actually it needs the cipher block size extra... */
347 data = OPENSSL_malloc((unsigned int)dsize + 20);
349 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
357 if (callback == NULL)
358 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
360 klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
362 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
365 #ifdef CHARSET_EBCDIC
366 /* Convert the pass phrase from EBCDIC */
367 ebcdic2ascii(buf, buf, klen);
369 kstr = (unsigned char *)buf;
371 if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
374 * The 'iv' is used as the iv and as a salt. It is NOT taken from
375 * the BytesToKey function
377 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
380 if (kstr == (unsigned char *)buf)
381 OPENSSL_cleanse(buf, PEM_BUFSIZE);
384 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
385 PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
389 if ((ctx = EVP_CIPHER_CTX_new()) == NULL
390 || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
391 || !EVP_EncryptUpdate(ctx, data, &j, data, i)
392 || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
401 i = PEM_write_bio(bp, name, buf, data, i);
405 OPENSSL_cleanse(key, sizeof(key));
406 OPENSSL_cleanse(iv, sizeof(iv));
407 EVP_CIPHER_CTX_free(ctx);
408 OPENSSL_cleanse(buf, PEM_BUFSIZE);
409 OPENSSL_clear_free(data, (unsigned int)dsize);
413 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
414 pem_password_cb *callback, void *u)
419 int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
421 unsigned char key[EVP_MAX_KEY_LENGTH];
422 char buf[PEM_BUFSIZE];
424 #if LONG_MAX > INT_MAX
425 /* Check that we did not truncate the length */
427 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
432 if (cipher->cipher == NULL)
434 if (callback == NULL)
435 keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
437 keylen = callback(buf, PEM_BUFSIZE, 0, u);
439 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
442 #ifdef CHARSET_EBCDIC
443 /* Convert the pass phrase from EBCDIC */
444 ebcdic2ascii(buf, buf, keylen);
447 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
448 (unsigned char *)buf, keylen, 1, key, NULL))
451 ctx = EVP_CIPHER_CTX_new();
455 ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
457 ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
459 /* Squirrel away the length of data decrypted so far. */
461 ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
466 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
468 EVP_CIPHER_CTX_free(ctx);
469 OPENSSL_cleanse((char *)buf, sizeof(buf));
470 OPENSSL_cleanse((char *)key, sizeof(key));
475 * This implements a very limited PEM header parser that does not support the
476 * full grammar of rfc1421. In particular, folded headers are not supported,
477 * nor is additional whitespace.
479 * A robust implementation would make use of a library that turns the headers
480 * into a BIO from which one folded line is read at a time, and is then split
481 * into a header label and content. We would then parse the content of the
482 * headers we care about. This is overkill for just this limited use-case, but
483 * presumably we also parse rfc822-style headers for S/MIME, so a common
484 * abstraction might well be more generally useful.
486 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
488 static const char ProcType[] = "Proc-Type:";
489 static const char ENCRYPTED[] = "ENCRYPTED";
490 static const char DEKInfo[] = "DEK-Info:";
491 const EVP_CIPHER *enc = NULL;
493 char *dekinfostart, c;
495 cipher->cipher = NULL;
496 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
499 if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
500 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
503 header += sizeof(ProcType)-1;
504 header += strspn(header, " \t");
506 if (*header++ != '4' || *header++ != ',')
508 header += strspn(header, " \t");
510 /* We expect "ENCRYPTED" followed by optional white-space + line break */
511 if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
512 strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
513 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
516 header += sizeof(ENCRYPTED)-1;
517 header += strspn(header, " \t\r");
518 if (*header++ != '\n') {
519 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
524 * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
525 * We expect "DEK-Info: algo[,hex-parameters]"
527 if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
528 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
531 header += sizeof(DEKInfo)-1;
532 header += strspn(header, " \t");
535 * DEK-INFO is a comma-separated combination of algorithm name and optional
538 dekinfostart = header;
539 header += strcspn(header, " \t,");
542 cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
544 header += strspn(header, " \t");
547 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
550 ivlen = EVP_CIPHER_iv_length(enc);
551 if (ivlen > 0 && *header++ != ',') {
552 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
554 } else if (ivlen == 0 && *header == ',') {
555 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
559 if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
565 static int load_iv(char **fromp, unsigned char *to, int num)
571 for (i = 0; i < num; i++)
574 for (i = 0; i < num; i++) {
575 v = OPENSSL_hexchar2int(*from);
577 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
581 to[i / 2] |= v << (long)((!(i & 1)) * 4);
588 #ifndef OPENSSL_NO_STDIO
589 int PEM_write(FILE *fp, const char *name, const char *header,
590 const unsigned char *data, long len)
595 if ((b = BIO_new(BIO_s_file())) == NULL) {
596 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
599 BIO_set_fp(b, fp, BIO_NOCLOSE);
600 ret = PEM_write_bio(b, name, header, data, len);
606 int PEM_write_bio(BIO *bp, const char *name, const char *header,
607 const unsigned char *data, long len)
609 int nlen, n, i, j, outl;
610 unsigned char *buf = NULL;
611 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
612 int reason = ERR_R_BUF_LIB;
615 reason = ERR_R_MALLOC_FAILURE;
622 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
623 (BIO_write(bp, name, nlen) != nlen) ||
624 (BIO_write(bp, "-----\n", 6) != 6))
629 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
633 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
635 reason = ERR_R_MALLOC_FAILURE;
641 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
642 if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
644 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
650 EVP_EncodeFinal(ctx, buf, &outl);
651 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
653 if ((BIO_write(bp, "-----END ", 9) != 9) ||
654 (BIO_write(bp, name, nlen) != nlen) ||
655 (BIO_write(bp, "-----\n", 6) != 6))
657 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
658 EVP_ENCODE_CTX_free(ctx);
661 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
662 EVP_ENCODE_CTX_free(ctx);
663 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
667 #ifndef OPENSSL_NO_STDIO
668 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
674 if ((b = BIO_new(BIO_s_file())) == NULL) {
675 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
678 BIO_set_fp(b, fp, BIO_NOCLOSE);
679 ret = PEM_read_bio(b, name, header, data, len);
685 /* Some helpers for PEM_read_bio_ex(). */
686 static int sanitize_line(char *linebuf, int len, unsigned int flags)
690 if (flags & PEM_FLAG_EAY_COMPATIBLE) {
691 /* Strip trailing whitespace */
692 while ((len >= 0) && (linebuf[len] <= ' '))
694 /* Go back to whitespace before applying uniform line ending. */
696 } else if (flags & PEM_FLAG_ONLY_B64) {
697 for (i = 0; i < len; ++i) {
698 if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n'
699 || linebuf[i] == '\r')
704 /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip
705 * control characters in-place and let everything through. */
706 for (i = 0; i < len; ++i) {
707 if (linebuf[i] == '\n' || linebuf[i] == '\r')
709 if (ossl_iscntrl(linebuf[i]))
714 /* The caller allocated LINESIZE+1, so this is safe. */
715 linebuf[len++] = '\n';
721 /* Note trailing spaces for begin and end. */
722 static const char beginstr[] = "-----BEGIN ";
723 static const char endstr[] = "-----END ";
724 static const char tailstr[] = "-----\n";
725 #define BEGINLEN (sizeof(beginstr) - 1)
726 #define ENDLEN (sizeof(endstr) - 1)
727 #define TAILLEN (sizeof(tailstr) - 1)
728 static int get_name(BIO *bp, char **name, unsigned int flags)
735 * Need to hold trailing NUL (accounted for by BIO_gets() and the newline
736 * that will be added by sanitize_line() (the extra '1').
738 linebuf = pem_malloc(LINESIZE + 1, flags);
739 if (linebuf == NULL) {
740 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
745 len = BIO_gets(bp, linebuf, LINESIZE);
748 PEMerr(PEM_F_GET_NAME, PEM_R_NO_START_LINE);
752 /* Strip trailing garbage and standardize ending. */
753 len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64);
755 /* Allow leading empty or non-matching lines. */
756 } while (strncmp(linebuf, beginstr, BEGINLEN) != 0
758 || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0);
759 linebuf[len - TAILLEN] = '\0';
760 len = len - BEGINLEN - TAILLEN + 1;
761 *name = pem_malloc(len, flags);
763 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
766 memcpy(*name, linebuf + BEGINLEN, len);
770 pem_free(linebuf, flags, LINESIZE + 1);
774 /* Keep track of how much of a header we've seen. */
782 * Extract the optional PEM header, with details on the type of content and
783 * any encryption used on the contents, and the bulk of the data from the bio.
784 * The end of the header is marked by a blank line; if the end-of-input marker
785 * is reached prior to a blank line, there is no header.
787 * The header and data arguments are BIO** since we may have to swap them
788 * if there is no header, for efficiency.
790 * We need the name of the PEM-encoded type to verify the end string.
792 static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name,
797 int len, line, ret = 0, end = 0;
798 /* 0 if not seen (yet), 1 if reading header, 2 if finished header */
799 enum header_status got_header = MAYBE_HEADER;
800 unsigned int flags_mask;
803 /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline
804 * that will be added by sanitize_line() (the extra '1'). */
805 linebuf = pem_malloc(LINESIZE + 1, flags);
806 if (linebuf == NULL) {
807 PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE);
811 for (line = 0; ; line++) {
813 len = BIO_gets(bp, linebuf, LINESIZE);
815 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_SHORT_HEADER);
819 if (got_header == MAYBE_HEADER) {
820 if (memchr(linebuf, ':', len) != NULL)
821 got_header = IN_HEADER;
823 if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER)
824 flags_mask &= ~PEM_FLAG_ONLY_B64;
825 len = sanitize_line(linebuf, len, flags & flags_mask);
827 /* Check for end of header. */
828 if (linebuf[0] == '\n') {
829 if (got_header == POST_HEADER) {
830 /* Another blank line is an error. */
831 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
834 got_header = POST_HEADER;
839 /* Check for end of stream (which means there is no header). */
840 if (strncmp(linebuf, endstr, ENDLEN) == 0) {
841 p = linebuf + ENDLEN;
842 namelen = strlen(name);
843 if (strncmp(p, name, namelen) != 0 ||
844 strncmp(p + namelen, tailstr, TAILLEN) != 0) {
845 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
848 if (got_header == MAYBE_HEADER) {
854 /* Malformed input; short line not at end of data. */
855 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
859 * Else, a line of text -- could be header or data; we don't
860 * know yet. Just pass it through.
862 if (BIO_puts(tmp, linebuf) < 0)
865 * Only encrypted files need the line length check applied.
867 if (got_header == POST_HEADER) {
868 /* 65 includes the trailing newline */
878 pem_free(linebuf, flags, LINESIZE + 1);
883 * Read in PEM-formatted data from the given BIO.
885 * By nature of the PEM format, all content must be printable ASCII (except
886 * for line endings). Other characters, or lines that are longer than 80
887 * characters, are malformed input and will be rejected.
889 int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
890 unsigned char **data, long *len_out, unsigned int flags)
892 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
893 const BIO_METHOD *bmeth;
894 BIO *headerB = NULL, *dataB = NULL;
896 int len, taillen, headerlen, ret = 0;
900 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
905 *name_out = *header = NULL;
907 if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
908 /* These two are mutually incompatible; bail out. */
909 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT);
912 bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
914 headerB = BIO_new(bmeth);
915 dataB = BIO_new(bmeth);
916 if (headerB == NULL || dataB == NULL) {
917 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
921 if (!get_name(bp, &name, flags))
923 if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
927 BIO_get_mem_ptr(dataB, &buf_mem);
928 len = buf_mem->length;
929 if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
930 (unsigned char*)buf_mem->data, len) < 0
931 || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
933 PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE);
937 buf_mem->length = len;
939 /* There was no data in the PEM file; avoid malloc(0). */
942 headerlen = BIO_get_mem_data(headerB, NULL);
943 *header = pem_malloc(headerlen + 1, flags);
944 *data = pem_malloc(len, flags);
945 if (*header == NULL || *data == NULL) {
946 pem_free(*header, flags, 0);
947 pem_free(*data, flags, 0);
950 BIO_read(headerB, *header, headerlen);
951 (*header)[headerlen] = '\0';
952 BIO_read(dataB, *data, len);
959 EVP_ENCODE_CTX_free(ctx);
960 pem_free(name, flags, 0);
966 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
969 return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE);
973 * Check pem string and return prefix length. If for example the pem_str ==
974 * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
978 int pem_check_suffix(const char *pem_str, const char *suffix)
980 int pem_len = strlen(pem_str);
981 int suffix_len = strlen(suffix);
983 if (suffix_len + 1 >= pem_len)
985 p = pem_str + pem_len - suffix_len;
986 if (strcmp(p, suffix))