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
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)
225 if (flags & PEM_FLAG_SECURE)
226 OPENSSL_secure_free(p);
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;
250 pem_free(header, flags);
251 pem_free(data, flags);
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)
274 pem_free(header, flags);
276 pem_free(data, flags);
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 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
333 if ((dsize = i2d(x, NULL)) < 0) {
334 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
338 /* dsize + 8 bytes are needed */
339 /* actually it needs the cipher block size extra... */
340 data = OPENSSL_malloc((unsigned int)dsize + 20);
342 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
350 if (callback == NULL)
351 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
353 klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
355 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
358 #ifdef CHARSET_EBCDIC
359 /* Convert the pass phrase from EBCDIC */
360 ebcdic2ascii(buf, buf, klen);
362 kstr = (unsigned char *)buf;
364 RAND_add(data, i, 0); /* put in the RSA key. */
365 OPENSSL_assert(EVP_CIPHER_iv_length(enc) <= (int)sizeof(iv));
366 if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
369 * The 'iv' is used as the iv and as a salt. It is NOT taken from
370 * the BytesToKey function
372 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
375 if (kstr == (unsigned char *)buf)
376 OPENSSL_cleanse(buf, PEM_BUFSIZE);
378 OPENSSL_assert(strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13
382 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
383 PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
387 if ((ctx = EVP_CIPHER_CTX_new()) == NULL
388 || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
389 || !EVP_EncryptUpdate(ctx, data, &j, data, i)
390 || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
399 i = PEM_write_bio(bp, name, buf, data, i);
403 OPENSSL_cleanse(key, sizeof(key));
404 OPENSSL_cleanse(iv, sizeof(iv));
405 EVP_CIPHER_CTX_free(ctx);
406 OPENSSL_cleanse(buf, PEM_BUFSIZE);
407 OPENSSL_clear_free(data, (unsigned int)dsize);
411 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
412 pem_password_cb *callback, void *u)
417 int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
419 unsigned char key[EVP_MAX_KEY_LENGTH];
420 char buf[PEM_BUFSIZE];
422 #if LONG_MAX > INT_MAX
423 /* Check that we did not truncate the length */
425 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
430 if (cipher->cipher == NULL)
432 if (callback == NULL)
433 keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
435 keylen = callback(buf, PEM_BUFSIZE, 0, u);
437 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
440 #ifdef CHARSET_EBCDIC
441 /* Convert the pass phrase from EBCDIC */
442 ebcdic2ascii(buf, buf, keylen);
445 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
446 (unsigned char *)buf, keylen, 1, key, NULL))
449 ctx = EVP_CIPHER_CTX_new();
453 ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
455 ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
457 /* Squirrel away the length of data decrypted so far. */
459 ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
464 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
466 EVP_CIPHER_CTX_free(ctx);
467 OPENSSL_cleanse((char *)buf, sizeof(buf));
468 OPENSSL_cleanse((char *)key, sizeof(key));
473 * This implements a very limited PEM header parser that does not support the
474 * full grammar of rfc1421. In particular, folded headers are not supported,
475 * nor is additional whitespace.
477 * A robust implementation would make use of a library that turns the headers
478 * into a BIO from which one folded line is read at a time, and is then split
479 * into a header label and content. We would then parse the content of the
480 * headers we care about. This is overkill for just this limited use-case, but
481 * presumably we also parse rfc822-style headers for S/MIME, so a common
482 * abstraction might well be more generally useful.
484 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
486 static const char ProcType[] = "Proc-Type:";
487 static const char ENCRYPTED[] = "ENCRYPTED";
488 static const char DEKInfo[] = "DEK-Info:";
489 const EVP_CIPHER *enc = NULL;
491 char *dekinfostart, c;
493 cipher->cipher = NULL;
494 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
497 if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
498 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
501 header += sizeof(ProcType)-1;
502 header += strspn(header, " \t");
504 if (*header++ != '4' || *header++ != ',')
506 header += strspn(header, " \t");
508 /* We expect "ENCRYPTED" followed by optional white-space + line break */
509 if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
510 strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
511 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
514 header += sizeof(ENCRYPTED)-1;
515 header += strspn(header, " \t\r");
516 if (*header++ != '\n') {
517 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
522 * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
523 * We expect "DEK-Info: algo[,hex-parameters]"
525 if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
526 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
529 header += sizeof(DEKInfo)-1;
530 header += strspn(header, " \t");
533 * DEK-INFO is a comma-separated combination of algorithm name and optional
536 dekinfostart = header;
537 header += strcspn(header, " \t,");
540 cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
542 header += strspn(header, " \t");
545 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
548 ivlen = EVP_CIPHER_iv_length(enc);
549 if (ivlen > 0 && *header++ != ',') {
550 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
552 } else if (ivlen == 0 && *header == ',') {
553 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
557 if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
563 static int load_iv(char **fromp, unsigned char *to, int num)
569 for (i = 0; i < num; i++)
572 for (i = 0; i < num; i++) {
573 v = OPENSSL_hexchar2int(*from);
575 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
579 to[i / 2] |= v << (long)((!(i & 1)) * 4);
586 #ifndef OPENSSL_NO_STDIO
587 int PEM_write(FILE *fp, const char *name, const char *header,
588 const unsigned char *data, long len)
593 if ((b = BIO_new(BIO_s_file())) == NULL) {
594 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
597 BIO_set_fp(b, fp, BIO_NOCLOSE);
598 ret = PEM_write_bio(b, name, header, data, len);
604 int PEM_write_bio(BIO *bp, const char *name, const char *header,
605 const unsigned char *data, long len)
607 int nlen, n, i, j, outl;
608 unsigned char *buf = NULL;
609 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
610 int reason = ERR_R_BUF_LIB;
613 reason = ERR_R_MALLOC_FAILURE;
620 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
621 (BIO_write(bp, name, nlen) != nlen) ||
622 (BIO_write(bp, "-----\n", 6) != 6))
627 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
631 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
633 reason = ERR_R_MALLOC_FAILURE;
639 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
640 if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
642 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
648 EVP_EncodeFinal(ctx, buf, &outl);
649 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
651 if ((BIO_write(bp, "-----END ", 9) != 9) ||
652 (BIO_write(bp, name, nlen) != nlen) ||
653 (BIO_write(bp, "-----\n", 6) != 6))
655 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
656 EVP_ENCODE_CTX_free(ctx);
659 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
660 EVP_ENCODE_CTX_free(ctx);
661 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
665 #ifndef OPENSSL_NO_STDIO
666 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
672 if ((b = BIO_new(BIO_s_file())) == NULL) {
673 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
676 BIO_set_fp(b, fp, BIO_NOCLOSE);
677 ret = PEM_read_bio(b, name, header, data, len);
683 /* Some helpers for PEM_read_bio_ex(). */
685 #define isb64(c) (isalnum(c) || (c) == '+' || (c) == '/' || (c) == '=')
687 static int sanitize_line(char *linebuf, int len, unsigned int flags)
691 if (flags & PEM_FLAG_EAY_COMPATIBLE) {
692 /* Strip trailing whitespace */
693 while ((len >= 0) && (linebuf[len] <= ' '))
695 /* Go back to whitespace before applying uniform line ending. */
697 } else if (flags & PEM_FLAG_ONLY_B64) {
698 for (i = 0; i < len; ++i) {
699 if (!isb64(linebuf[i]) || linebuf[i] == '\n' || 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 (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);
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 BIO_puts(tmp, linebuf);
864 * Only encrypted files need the line length check applied.
866 if (got_header == POST_HEADER) {
867 /* 65 includes the trailing newline */
877 pem_free(linebuf, flags);
882 * Read in PEM-formatted data from the given BIO.
884 * By nature of the PEM format, all content must be printable ASCII (except
885 * for line endings). Other characters, or lines that are longer than 80
886 * characters, are malformed input and will be rejected.
888 int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
889 unsigned char **data, long *len_out, unsigned int flags)
891 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
892 const BIO_METHOD *bmeth;
893 BIO *headerB = NULL, *dataB = NULL;
895 int len, taillen, headerlen, ret = 0;
899 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
904 *name_out = *header = NULL;
906 if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
907 /* These two are mutually incompatible; bail out. */
908 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT);
911 bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
913 headerB = BIO_new(bmeth);
914 dataB = BIO_new(bmeth);
915 if (headerB == NULL || dataB == NULL) {
916 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
920 if (!get_name(bp, &name, flags))
922 if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
926 BIO_get_mem_ptr(dataB, &buf_mem);
927 len = buf_mem->length;
928 if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
929 (unsigned char*)buf_mem->data, len) < 0
930 || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
932 PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE);
936 buf_mem->length = len;
938 /* There was no data in the PEM file; avoid malloc(0). */
941 headerlen = BIO_get_mem_data(headerB, NULL);
942 *header = pem_malloc(headerlen + 1, flags);
943 *data = pem_malloc(len, flags);
944 if (*header == NULL || *data == NULL) {
945 pem_free(*header, flags);
946 pem_free(*data, flags);
949 BIO_read(headerB, *header, headerlen);
950 (*header)[headerlen] = '\0';
951 BIO_read(dataB, *data, len);
958 EVP_ENCODE_CTX_free(ctx);
959 pem_free(name, flags);
965 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
968 return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE);
972 * Check pem string and return prefix length. If for example the pem_str ==
973 * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
977 int pem_check_suffix(const char *pem_str, const char *suffix)
979 int pem_len = strlen(pem_str);
980 int suffix_len = strlen(suffix);
982 if (suffix_len + 1 >= pem_len)
984 p = pem_str + pem_len - suffix_len;
985 if (strcmp(p, suffix))