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)
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)
75 if (type == PEM_TYPE_ENCRYPTED)
77 else if (type == PEM_TYPE_MIC_CLEAR)
79 else if (type == PEM_TYPE_MIC_ONLY)
84 OPENSSL_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
85 OPENSSL_strlcat(buf, str, PEM_BUFSIZE);
86 OPENSSL_strlcat(buf, "\n", PEM_BUFSIZE);
89 void PEM_dek_info(char *buf, const char *type, int len, char *str)
91 static const unsigned char map[17] = "0123456789ABCDEF";
95 OPENSSL_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
96 OPENSSL_strlcat(buf, type, PEM_BUFSIZE);
97 OPENSSL_strlcat(buf, ",", PEM_BUFSIZE);
99 if (j + (len * 2) + 1 > PEM_BUFSIZE)
101 for (i = 0; i < len; i++) {
102 buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
103 buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
105 buf[j + i * 2] = '\n';
106 buf[j + i * 2 + 1] = '\0';
109 #ifndef OPENSSL_NO_STDIO
110 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
111 pem_password_cb *cb, void *u)
116 if ((b = BIO_new(BIO_s_file())) == NULL) {
117 PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
120 BIO_set_fp(b, fp, BIO_NOCLOSE);
121 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
127 static int check_pem(const char *nm, const char *name)
129 /* Normal matching nm and name */
130 if (strcmp(nm, name) == 0)
133 /* Make PEM_STRING_EVP_PKEY match any private key */
135 if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) {
137 const EVP_PKEY_ASN1_METHOD *ameth;
138 if (strcmp(nm, PEM_STRING_PKCS8) == 0)
140 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0)
142 slen = pem_check_suffix(nm, "PRIVATE KEY");
145 * NB: ENGINE implementations won't contain a deprecated old
146 * private key decode function so don't look for them.
148 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
149 if (ameth && ameth->old_priv_decode)
155 if (strcmp(name, PEM_STRING_PARAMETERS) == 0) {
157 const EVP_PKEY_ASN1_METHOD *ameth;
158 slen = pem_check_suffix(nm, "PARAMETERS");
161 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
164 if (ameth->param_decode)
168 #ifndef OPENSSL_NO_ENGINE
176 /* If reading DH parameters handle X9.42 DH format too */
177 if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0
178 && strcmp(name, PEM_STRING_DHPARAMS) == 0)
181 /* Permit older strings */
183 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
184 && strcmp(name, PEM_STRING_X509) == 0)
187 if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0
188 && strcmp(name, PEM_STRING_X509_REQ) == 0)
191 /* Allow normal certs to be read as trusted certs */
192 if (strcmp(nm, PEM_STRING_X509) == 0
193 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
196 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
197 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
200 /* Some CAs use PKCS#7 with CERTIFICATE headers */
201 if (strcmp(nm, PEM_STRING_X509) == 0
202 && strcmp(name, PEM_STRING_PKCS7) == 0)
205 if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0
206 && strcmp(name, PEM_STRING_PKCS7) == 0)
209 #ifndef OPENSSL_NO_CMS
210 if (strcmp(nm, PEM_STRING_X509) == 0
211 && strcmp(name, PEM_STRING_CMS) == 0)
213 /* Allow CMS to be read from PKCS#7 headers */
214 if (strcmp(nm, PEM_STRING_PKCS7) == 0
215 && strcmp(name, PEM_STRING_CMS) == 0)
222 static void pem_free(void *p, unsigned int flags)
224 if (flags & PEM_FLAG_SECURE)
225 OPENSSL_secure_free(p);
230 static void *pem_malloc(int num, unsigned int flags)
232 return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num)
233 : OPENSSL_malloc(num);
236 static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen,
237 char **pnm, const char *name, BIO *bp,
238 pem_password_cb *cb, void *u,
241 EVP_CIPHER_INFO cipher;
242 char *nm = NULL, *header = NULL;
243 unsigned char *data = NULL;
249 pem_free(header, flags);
250 pem_free(data, flags);
251 if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) {
252 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
253 ERR_add_error_data(2, "Expecting: ", name);
256 } while (!check_pem(nm, name));
257 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
259 if (!PEM_do_header(&cipher, data, &len, cb, u))
271 if (!ret || pnm == NULL)
273 pem_free(header, flags);
275 pem_free(data, flags);
279 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
280 const char *name, BIO *bp, pem_password_cb *cb,
282 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
283 PEM_FLAG_EAY_COMPATIBLE);
286 int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm,
287 const char *name, BIO *bp, pem_password_cb *cb,
289 return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
290 PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE);
293 #ifndef OPENSSL_NO_STDIO
294 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
295 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
296 int klen, pem_password_cb *callback, void *u)
301 if ((b = BIO_new(BIO_s_file())) == NULL) {
302 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
305 BIO_set_fp(b, fp, BIO_NOCLOSE);
306 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
312 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
313 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
314 int klen, pem_password_cb *callback, void *u)
316 EVP_CIPHER_CTX *ctx = NULL;
317 int dsize = 0, i = 0, j = 0, ret = 0;
318 unsigned char *p, *data = NULL;
319 const char *objstr = NULL;
320 char buf[PEM_BUFSIZE];
321 unsigned char key[EVP_MAX_KEY_LENGTH];
322 unsigned char iv[EVP_MAX_IV_LENGTH];
325 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
326 if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0) {
327 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
332 if ((dsize = i2d(x, NULL)) < 0) {
333 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
337 /* dsize + 8 bytes are needed */
338 /* actually it needs the cipher block size extra... */
339 data = OPENSSL_malloc((unsigned int)dsize + 20);
341 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
349 if (callback == NULL)
350 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
352 klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
354 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
357 #ifdef CHARSET_EBCDIC
358 /* Convert the pass phrase from EBCDIC */
359 ebcdic2ascii(buf, buf, klen);
361 kstr = (unsigned char *)buf;
363 RAND_add(data, i, 0); /* put in the RSA key. */
364 OPENSSL_assert(EVP_CIPHER_iv_length(enc) <= (int)sizeof(iv));
365 if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
368 * The 'iv' is used as the iv and as a salt. It is NOT taken from
369 * the BytesToKey function
371 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
374 if (kstr == (unsigned char *)buf)
375 OPENSSL_cleanse(buf, PEM_BUFSIZE);
377 OPENSSL_assert(strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13
381 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
382 PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
386 if ((ctx = EVP_CIPHER_CTX_new()) == NULL
387 || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
388 || !EVP_EncryptUpdate(ctx, data, &j, data, i)
389 || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
398 i = PEM_write_bio(bp, name, buf, data, i);
402 OPENSSL_cleanse(key, sizeof(key));
403 OPENSSL_cleanse(iv, sizeof(iv));
404 EVP_CIPHER_CTX_free(ctx);
405 OPENSSL_cleanse(buf, PEM_BUFSIZE);
406 OPENSSL_clear_free(data, (unsigned int)dsize);
410 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
411 pem_password_cb *callback, void *u)
416 int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
418 unsigned char key[EVP_MAX_KEY_LENGTH];
419 char buf[PEM_BUFSIZE];
421 #if LONG_MAX > INT_MAX
422 /* Check that we did not truncate the length */
424 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
429 if (cipher->cipher == NULL)
431 if (callback == NULL)
432 keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
434 keylen = callback(buf, PEM_BUFSIZE, 0, u);
436 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
439 #ifdef CHARSET_EBCDIC
440 /* Convert the pass phrase from EBCDIC */
441 ebcdic2ascii(buf, buf, keylen);
444 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
445 (unsigned char *)buf, keylen, 1, key, NULL))
448 ctx = EVP_CIPHER_CTX_new();
452 ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
454 ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
456 /* Squirrel away the length of data decrypted so far. */
458 ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
463 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
465 EVP_CIPHER_CTX_free(ctx);
466 OPENSSL_cleanse((char *)buf, sizeof(buf));
467 OPENSSL_cleanse((char *)key, sizeof(key));
472 * This implements a very limited PEM header parser that does not support the
473 * full grammar of rfc1421. In particular, folded headers are not supported,
474 * nor is additional whitespace.
476 * A robust implementation would make use of a library that turns the headers
477 * into a BIO from which one folded line is read at a time, and is then split
478 * into a header label and content. We would then parse the content of the
479 * headers we care about. This is overkill for just this limited use-case, but
480 * presumably we also parse rfc822-style headers for S/MIME, so a common
481 * abstraction might well be more generally useful.
483 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
485 static const char ProcType[] = "Proc-Type:";
486 static const char ENCRYPTED[] = "ENCRYPTED";
487 static const char DEKInfo[] = "DEK-Info:";
488 const EVP_CIPHER *enc = NULL;
490 char *dekinfostart, c;
492 cipher->cipher = NULL;
493 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
496 if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
497 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
500 header += sizeof(ProcType)-1;
501 header += strspn(header, " \t");
503 if (*header++ != '4' || *header++ != ',')
505 header += strspn(header, " \t");
507 /* We expect "ENCRYPTED" followed by optional white-space + line break */
508 if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
509 strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
510 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
513 header += sizeof(ENCRYPTED)-1;
514 header += strspn(header, " \t\r");
515 if (*header++ != '\n') {
516 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
521 * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
522 * We expect "DEK-Info: algo[,hex-parameters]"
524 if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
525 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
528 header += sizeof(DEKInfo)-1;
529 header += strspn(header, " \t");
532 * DEK-INFO is a comma-separated combination of algorithm name and optional
535 dekinfostart = header;
536 header += strcspn(header, " \t,");
539 cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
541 header += strspn(header, " \t");
544 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
547 ivlen = EVP_CIPHER_iv_length(enc);
548 if (ivlen > 0 && *header++ != ',') {
549 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
551 } else if (ivlen == 0 && *header == ',') {
552 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
556 if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
562 static int load_iv(char **fromp, unsigned char *to, int num)
568 for (i = 0; i < num; i++)
571 for (i = 0; i < num; i++) {
572 v = OPENSSL_hexchar2int(*from);
574 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
578 to[i / 2] |= v << (long)((!(i & 1)) * 4);
585 #ifndef OPENSSL_NO_STDIO
586 int PEM_write(FILE *fp, const char *name, const char *header,
587 const unsigned char *data, long len)
592 if ((b = BIO_new(BIO_s_file())) == NULL) {
593 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
596 BIO_set_fp(b, fp, BIO_NOCLOSE);
597 ret = PEM_write_bio(b, name, header, data, len);
603 int PEM_write_bio(BIO *bp, const char *name, const char *header,
604 const unsigned char *data, long len)
606 int nlen, n, i, j, outl;
607 unsigned char *buf = NULL;
608 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
609 int reason = ERR_R_BUF_LIB;
612 reason = ERR_R_MALLOC_FAILURE;
619 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
620 (BIO_write(bp, name, nlen) != nlen) ||
621 (BIO_write(bp, "-----\n", 6) != 6))
626 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
630 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
632 reason = ERR_R_MALLOC_FAILURE;
638 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
639 if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
641 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
647 EVP_EncodeFinal(ctx, buf, &outl);
648 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
650 if ((BIO_write(bp, "-----END ", 9) != 9) ||
651 (BIO_write(bp, name, nlen) != nlen) ||
652 (BIO_write(bp, "-----\n", 6) != 6))
654 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
655 EVP_ENCODE_CTX_free(ctx);
658 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
659 EVP_ENCODE_CTX_free(ctx);
660 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
664 #ifndef OPENSSL_NO_STDIO
665 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
671 if ((b = BIO_new(BIO_s_file())) == NULL) {
672 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
675 BIO_set_fp(b, fp, BIO_NOCLOSE);
676 ret = PEM_read_bio(b, name, header, data, len);
682 /* Some helpers for PEM_read_bio_ex(). */
684 #define isb64(c) (isalnum(c) || (c) == '+' || (c) == '/' || (c) == '=')
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 (!isb64(linebuf[i]) || linebuf[i] == '\n' || linebuf[i] == '\r')
703 /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip
704 * control characters in-place and let everything through. */
705 for (i = 0; i < len; ++i) {
706 if (linebuf[i] == '\n' || linebuf[i] == '\r')
708 if (iscntrl(linebuf[i]))
713 /* The caller allocated LINESIZE+1, so this is safe. */
714 linebuf[len++] = '\n';
720 /* Note trailing spaces for begin and end. */
721 static const char beginstr[] = "-----BEGIN ";
722 static const char endstr[] = "-----END ";
723 static const char tailstr[] = "-----\n";
724 #define BEGINLEN (sizeof(beginstr) - 1)
725 #define ENDLEN (sizeof(endstr) - 1)
726 #define TAILLEN (sizeof(tailstr) - 1)
727 static int get_name(BIO *bp, char **name, unsigned int flags)
734 * Need to hold trailing NUL (accounted for by BIO_gets() and the newline
735 * that will be added by sanitize_line() (the extra '1').
737 linebuf = pem_malloc(LINESIZE + 1, flags);
738 if (linebuf == NULL) {
739 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
744 len = BIO_gets(bp, linebuf, LINESIZE);
747 PEMerr(PEM_F_GET_NAME, PEM_R_NO_START_LINE);
751 /* Strip trailing garbage and standardize ending. */
752 len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64);
754 /* Allow leading empty or non-matching lines. */
755 } while (strncmp(linebuf, beginstr, BEGINLEN) != 0
757 || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0);
758 linebuf[len - TAILLEN] = '\0';
759 len = len - BEGINLEN - TAILLEN + 1;
760 *name = pem_malloc(len, flags);
762 PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
765 memcpy(*name, linebuf + BEGINLEN, len);
769 pem_free(linebuf, flags);
773 /* Keep track of how much of a header we've seen. */
781 * Extract the optional PEM header, with details on the type of content and
782 * any encryption used on the contents, and the bulk of the data from the bio.
783 * The end of the header is marked by a blank line; if the end-of-input marker
784 * is reached prior to a blank line, there is no header.
786 * The header and data arguments are BIO** since we may have to swap them
787 * if there is no header, for efficiency.
789 * We need the name of the PEM-encoded type to verify the end string.
791 static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name,
796 int len, line, ret = 0, end = 0;
797 /* 0 if not seen (yet), 1 if reading header, 2 if finished header */
798 enum header_status got_header = MAYBE_HEADER;
799 unsigned int flags_mask;
802 /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline
803 * that will be added by sanitize_line() (the extra '1'). */
804 linebuf = pem_malloc(LINESIZE + 1, flags);
805 if (linebuf == NULL) {
806 PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE);
810 for (line = 0; ; line++) {
812 len = BIO_gets(bp, linebuf, LINESIZE);
814 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_SHORT_HEADER);
818 if (got_header == MAYBE_HEADER) {
819 if (memchr(linebuf, ':', len) != NULL)
820 got_header = IN_HEADER;
822 if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER)
823 flags_mask &= ~PEM_FLAG_ONLY_B64;
824 len = sanitize_line(linebuf, len, flags & flags_mask);
826 /* Check for end of header. */
827 if (linebuf[0] == '\n') {
828 if (got_header == POST_HEADER) {
829 /* Another blank line is an error. */
830 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
833 got_header = POST_HEADER;
838 /* Check for end of stream (which means there is no header). */
839 if (strncmp(linebuf, endstr, ENDLEN) == 0) {
840 p = linebuf + ENDLEN;
841 namelen = strlen(name);
842 if (strncmp(p, name, namelen) != 0 ||
843 strncmp(p + namelen, tailstr, TAILLEN) != 0) {
844 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
847 if (got_header == MAYBE_HEADER) {
853 /* Malformed input; short line not at end of data. */
854 PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
858 * Else, a line of text -- could be header or data; we don't
859 * know yet. Just pass it through.
861 BIO_puts(tmp, linebuf);
863 * Only encrypted files need the line length check applied.
865 if (got_header == POST_HEADER) {
866 /* 65 includes the trailing newline */
876 pem_free(linebuf, flags);
881 * Read in PEM-formatted data from the given BIO.
883 * By nature of the PEM format, all content must be printable ASCII (except
884 * for line endings). Other characters, or lines that are longer than 80
885 * characters, are malformed input and will be rejected.
887 int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
888 unsigned char **data, long *len_out, unsigned int flags)
890 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
891 const BIO_METHOD *bmeth;
892 BIO *headerB = NULL, *dataB = NULL;
894 int len, taillen, headerlen, ret = 0;
898 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
903 *name_out = *header = NULL;
905 if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
906 /* These two are mutually incompatible; bail out. */
907 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT);
910 bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
912 headerB = BIO_new(bmeth);
913 dataB = BIO_new(bmeth);
914 if (headerB == NULL || dataB == NULL) {
915 PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
919 if (!get_name(bp, &name, flags))
921 if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
925 BIO_get_mem_ptr(dataB, &buf_mem);
926 len = buf_mem->length;
927 if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
928 (unsigned char*)buf_mem->data, len) < 0
929 || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
931 PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE);
935 buf_mem->length = len;
937 /* There was no data in the PEM file; avoid malloc(0). */
940 headerlen = BIO_get_mem_data(headerB, NULL);
941 *header = pem_malloc(headerlen + 1, flags);
942 *data = pem_malloc(len, flags);
943 if (*header == NULL || *data == NULL) {
944 pem_free(*header, flags);
945 pem_free(*data, flags);
948 BIO_read(headerB, *header, headerlen);
949 (*header)[headerlen] = '\0';
950 BIO_read(dataB, *data, len);
957 EVP_ENCODE_CTX_free(ctx);
958 pem_free(name, flags);
964 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
967 return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE);
971 * Check pem string and return prefix length. If for example the pem_str ==
972 * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
976 int pem_check_suffix(const char *pem_str, const char *suffix)
978 int pem_len = strlen(pem_str);
979 int suffix_len = strlen(suffix);
981 if (suffix_len + 1 >= pem_len)
983 p = pem_str + pem_len - suffix_len;
984 if (strcmp(p, suffix))