-/* crypto/pem/pem_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/ctype.h"
+#include <string.h>
+#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
-#ifndef NO_DES
+#include "internal/asn1_int.h"
#include <openssl/des.h>
-#endif
-
-const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
+#include <openssl/engine.h>
-#define MIN_LENGTH 4
+#define MIN_LENGTH 4
-static int def_callback(char *buf, int num, int w, void *userdata);
-static int load_iv(unsigned char **fromp,unsigned char *to, int num);
+static int load_iv(char **fromp, unsigned char *to, int num);
static int check_pem(const char *nm, const char *name);
-static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,
- int nid, const EVP_CIPHER *enc,
- char *kstr, int klen,
- pem_password_cb *cb, void *u);
-static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,
- int nid, const EVP_CIPHER *enc,
- char *kstr, int klen,
- pem_password_cb *cb, void *u);
-
-static int def_callback(char *buf, int num, int w, void *key)
- {
-#ifdef NO_FP_API
- /* We should not ever call the default callback routine from
- * windows. */
- PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return(-1);
-#else
- int i,j;
- const char *prompt;
- if(key) {
- i=strlen(key);
- i=(i > num)?num:i;
- memcpy(buf,key,i);
- return(i);
- }
-
- prompt=EVP_get_pw_prompt();
- if (prompt == NULL)
- prompt="Enter PEM pass phrase:";
-
- for (;;)
- {
- i=EVP_read_pw_string(buf,num,prompt,w);
- if (i != 0)
- {
- PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
- memset(buf,0,(unsigned int)num);
- return(-1);
- }
- j=strlen(buf);
- if (j < MIN_LENGTH)
- {
- fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
- }
- else
- break;
- }
- return(j);
-#endif
- }
+int pem_check_suffix(const char *pem_str, const char *suffix);
+
+int PEM_def_callback(char *buf, int num, int rwflag, void *userdata)
+{
+ int i, min_len;
+ const char *prompt;
+
+ /* We assume that the user passes a default password as userdata */
+ if (userdata) {
+ i = strlen(userdata);
+ i = (i > num) ? num : i;
+ memcpy(buf, userdata, i);
+ return i;
+ }
+
+ prompt = EVP_get_pw_prompt();
+ if (prompt == NULL)
+ prompt = "Enter PEM pass phrase:";
+
+ /*
+ * rwflag == 0 means decryption
+ * rwflag == 1 means encryption
+ *
+ * We assume that for encryption, we want a minimum length, while for
+ * decryption, we cannot know any minimum length, so we assume zero.
+ */
+ min_len = rwflag ? MIN_LENGTH : 0;
+
+ i = EVP_read_pw_string_min(buf, min_len, num, prompt, rwflag);
+ if (i != 0) {
+ PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
+ memset(buf, 0, (unsigned int)num);
+ return -1;
+ }
+ return strlen(buf);
+}
void PEM_proc_type(char *buf, int type)
- {
- const char *str;
-
- if (type == PEM_TYPE_ENCRYPTED)
- str="ENCRYPTED";
- else if (type == PEM_TYPE_MIC_CLEAR)
- str="MIC-CLEAR";
- else if (type == PEM_TYPE_MIC_ONLY)
- str="MIC-ONLY";
- else
- str="BAD-TYPE";
-
- strcat(buf,"Proc-Type: 4,");
- strcat(buf,str);
- strcat(buf,"\n");
- }
+{
+ const char *str;
+ char *p = buf + strlen(buf);
+
+ if (type == PEM_TYPE_ENCRYPTED)
+ str = "ENCRYPTED";
+ else if (type == PEM_TYPE_MIC_CLEAR)
+ str = "MIC-CLEAR";
+ else if (type == PEM_TYPE_MIC_ONLY)
+ str = "MIC-ONLY";
+ else
+ str = "BAD-TYPE";
+
+ BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str);
+}
void PEM_dek_info(char *buf, const char *type, int len, char *str)
- {
- static unsigned char map[17]="0123456789ABCDEF";
- long i;
- int j;
-
- strcat(buf,"DEK-Info: ");
- strcat(buf,type);
- strcat(buf,",");
- j=strlen(buf);
- for (i=0; i<len; i++)
- {
- buf[j+i*2] =map[(str[i]>>4)&0x0f];
- buf[j+i*2+1]=map[(str[i] )&0x0f];
- }
- buf[j+i*2]='\n';
- buf[j+i*2+1]='\0';
- }
-
-#ifndef NO_FP_API
-char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
- pem_password_cb *cb, void *u)
- {
- BIO *b;
- char *ret;
-
- if ((b=BIO_new(BIO_s_file())) == NULL)
- {
- PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
- return(0);
- }
- BIO_set_fp(b,fp,BIO_NOCLOSE);
- ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
- BIO_free(b);
- return(ret);
- }
+{
+ long i;
+ char *p = buf + strlen(buf);
+ int j = PEM_BUFSIZE - (size_t)(p - buf), n;
+
+ n = BIO_snprintf(p, j, "DEK-Info: %s,", type);
+ if (n > 0) {
+ j -= n;
+ p += n;
+ for (i = 0; i < len; i++) {
+ n = BIO_snprintf(p, j, "%02X", 0xff & str[i]);
+ if (n <= 0)
+ return;
+ j -= n;
+ p += n;
+ }
+ if (j > 1)
+ strcpy(p, "\n");
+ }
+}
+
+#ifndef OPENSSL_NO_STDIO
+void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
+ pem_password_cb *cb, void *u)
+{
+ BIO *b;
+ void *ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL) {
+ PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
+ return 0;
+ }
+ BIO_set_fp(b, fp, BIO_NOCLOSE);
+ ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
+ BIO_free(b);
+ return ret;
+}
#endif
static int check_pem(const char *nm, const char *name)
{
- /* Normal matching nm and name */
- if (!strcmp(nm,name)) return 1;
-
- /* Make PEM_STRING_EVP_PKEY match any private key */
-
- if(!strcmp(nm,PEM_STRING_PKCS8) &&
- !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
-
- if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
- !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
-
- if(!strcmp(nm,PEM_STRING_RSA) &&
- !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
-
- if(!strcmp(nm,PEM_STRING_DSA) &&
- !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
-
- /* Permit older strings */
+ /* Normal matching nm and name */
+ if (strcmp(nm, name) == 0)
+ return 1;
+
+ /* Make PEM_STRING_EVP_PKEY match any private key */
+
+ if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) {
+ int slen;
+ const EVP_PKEY_ASN1_METHOD *ameth;
+ if (strcmp(nm, PEM_STRING_PKCS8) == 0)
+ return 1;
+ if (strcmp(nm, PEM_STRING_PKCS8INF) == 0)
+ return 1;
+ slen = pem_check_suffix(nm, "PRIVATE KEY");
+ if (slen > 0) {
+ /*
+ * NB: ENGINE implementations won't contain a deprecated old
+ * private key decode function so don't look for them.
+ */
+ ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
+ if (ameth && ameth->old_priv_decode)
+ return 1;
+ }
+ return 0;
+ }
+
+ if (strcmp(name, PEM_STRING_PARAMETERS) == 0) {
+ int slen;
+ const EVP_PKEY_ASN1_METHOD *ameth;
+ slen = pem_check_suffix(nm, "PARAMETERS");
+ if (slen > 0) {
+ ENGINE *e;
+ ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
+ if (ameth) {
+ int r;
+ if (ameth->param_decode)
+ r = 1;
+ else
+ r = 0;
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(e);
+#endif
+ return r;
+ }
+ }
+ return 0;
+ }
+ /* If reading DH parameters handle X9.42 DH format too */
+ if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0
+ && strcmp(name, PEM_STRING_DHPARAMS) == 0)
+ return 1;
+
+ /* Permit older strings */
+
+ if (strcmp(nm, PEM_STRING_X509_OLD) == 0
+ && strcmp(name, PEM_STRING_X509) == 0)
+ return 1;
+
+ if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0
+ && strcmp(name, PEM_STRING_X509_REQ) == 0)
+ return 1;
+
+ /* Allow normal certs to be read as trusted certs */
+ if (strcmp(nm, PEM_STRING_X509) == 0
+ && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
+ return 1;
+
+ if (strcmp(nm, PEM_STRING_X509_OLD) == 0
+ && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
+ return 1;
+
+ /* Some CAs use PKCS#7 with CERTIFICATE headers */
+ if (strcmp(nm, PEM_STRING_X509) == 0
+ && strcmp(name, PEM_STRING_PKCS7) == 0)
+ return 1;
+
+ if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0
+ && strcmp(name, PEM_STRING_PKCS7) == 0)
+ return 1;
+
+#ifndef OPENSSL_NO_CMS
+ if (strcmp(nm, PEM_STRING_X509) == 0
+ && strcmp(name, PEM_STRING_CMS) == 0)
+ return 1;
+ /* Allow CMS to be read from PKCS#7 headers */
+ if (strcmp(nm, PEM_STRING_PKCS7) == 0
+ && strcmp(name, PEM_STRING_CMS) == 0)
+ return 1;
+#endif
- if(!strcmp(nm,PEM_STRING_X509_OLD) &&
- !strcmp(name,PEM_STRING_X509)) return 1;
+ return 0;
+}
- if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
- !strcmp(name,PEM_STRING_X509_REQ)) return 1;
+static void pem_free(void *p, unsigned int flags, size_t num)
+{
+ if (flags & PEM_FLAG_SECURE)
+ OPENSSL_secure_clear_free(p, num);
+ else
+ OPENSSL_free(p);
+}
- /* Allow normal certs to be read as trusted certs */
- if(!strcmp(nm,PEM_STRING_X509) &&
- !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
+static void *pem_malloc(int num, unsigned int flags)
+{
+ return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num)
+ : OPENSSL_malloc(num);
+}
- if(!strcmp(nm,PEM_STRING_X509_OLD) &&
- !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
+static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen,
+ char **pnm, const char *name, BIO *bp,
+ pem_password_cb *cb, void *u,
+ unsigned int flags)
+{
+ EVP_CIPHER_INFO cipher;
+ char *nm = NULL, *header = NULL;
+ unsigned char *data = NULL;
+ long len = 0;
+ int ret = 0;
+
+ do {
+ pem_free(nm, flags, 0);
+ pem_free(header, flags, 0);
+ pem_free(data, flags, len);
+ if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) {
+ if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
+ ERR_add_error_data(2, "Expecting: ", name);
+ return 0;
+ }
+ } while (!check_pem(nm, name));
+ if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
+ goto err;
+ if (!PEM_do_header(&cipher, data, &len, cb, u))
+ goto err;
+
+ *pdata = data;
+ *plen = len;
+
+ if (pnm != NULL)
+ *pnm = nm;
+
+ ret = 1;
+
+ err:
+ if (!ret || pnm == NULL)
+ pem_free(nm, flags, 0);
+ pem_free(header, flags, 0);
+ if (!ret)
+ pem_free(data, flags, len);
+ return ret;
+}
- /* Some CAs use PKCS#7 with CERTIFICATE headers */
- if(!strcmp(nm, PEM_STRING_X509) &&
- !strcmp(name, PEM_STRING_PKCS7)) return 1;
+int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
+ const char *name, BIO *bp, pem_password_cb *cb,
+ void *u) {
+ return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
+ PEM_FLAG_EAY_COMPATIBLE);
+}
- return 0;
+int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm,
+ const char *name, BIO *bp, pem_password_cb *cb,
+ void *u) {
+ return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u,
+ PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE);
}
-char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x,
- pem_password_cb *cb, void *u)
- {
- EVP_CIPHER_INFO cipher;
- char *nm=NULL,*header=NULL;
- unsigned char *p=NULL,*data=NULL;
- long len;
- char *ret=NULL;
-
- for (;;)
- {
- if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
- if(ERR_GET_REASON(ERR_peek_error()) ==
- PEM_R_NO_START_LINE)
- ERR_add_error_data(2, "Expecting: ", name);
- return(NULL);
- }
- if(check_pem(nm, name)) break;
- OPENSSL_free(nm);
- OPENSSL_free(header);
- OPENSSL_free(data);
- }
- if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
- if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
- p=data;
- if (strcmp(name,PEM_STRING_EVP_PKEY) == 0) {
- if (strcmp(nm,PEM_STRING_RSA) == 0)
- ret=d2i(EVP_PKEY_RSA,x,&p,len);
- else if (strcmp(nm,PEM_STRING_DSA) == 0)
- ret=d2i(EVP_PKEY_DSA,x,&p,len);
- else if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) {
- PKCS8_PRIV_KEY_INFO *p8inf;
- p8inf=d2i_PKCS8_PRIV_KEY_INFO(
- (PKCS8_PRIV_KEY_INFO **) x, &p, len);
- ret = (char *)EVP_PKCS82PKEY(p8inf);
- PKCS8_PRIV_KEY_INFO_free(p8inf);
- } else if (strcmp(nm,PEM_STRING_PKCS8) == 0) {
- PKCS8_PRIV_KEY_INFO *p8inf;
- X509_SIG *p8;
- int klen;
- char psbuf[PEM_BUFSIZE];
- p8 = d2i_X509_SIG(NULL, &p, len);
- if(!p8) goto p8err;
- if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
- else klen=def_callback(psbuf,PEM_BUFSIZE,0,u);
- if (klen <= 0) {
- PEMerr(PEM_F_PEM_ASN1_READ_BIO,
- PEM_R_BAD_PASSWORD_READ);
- goto err;
- }
- p8inf = PKCS8_decrypt(p8, psbuf, klen);
- X509_SIG_free(p8);
- if(!p8inf) goto p8err;
- ret = (char *)EVP_PKCS82PKEY(p8inf);
- if(x) {
- if(*x) EVP_PKEY_free((EVP_PKEY *)*x);
- *x = ret;
- }
- PKCS8_PRIV_KEY_INFO_free(p8inf);
- }
- } else ret=d2i(x,&p,len);
-p8err:
- if (ret == NULL)
- PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
-err:
- OPENSSL_free(nm);
- OPENSSL_free(header);
- OPENSSL_free(data);
- return(ret);
- }
-
-#ifndef NO_FP_API
-int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
- const EVP_CIPHER *enc, unsigned char *kstr, int klen,
- pem_password_cb *callback, void *u)
- {
- BIO *b;
- int ret;
-
- if ((b=BIO_new(BIO_s_file())) == NULL)
- {
- PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
- return(0);
- }
- BIO_set_fp(b,fp,BIO_NOCLOSE);
- ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
- BIO_free(b);
- return(ret);
- }
+#ifndef OPENSSL_NO_STDIO
+int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
+ void *x, const EVP_CIPHER *enc, unsigned char *kstr,
+ int klen, pem_password_cb *callback, void *u)
+{
+ BIO *b;
+ int ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL) {
+ PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
+ return 0;
+ }
+ BIO_set_fp(b, fp, BIO_NOCLOSE);
+ ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
+ BIO_free(b);
+ return ret;
+}
#endif
-int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
- const EVP_CIPHER *enc, unsigned char *kstr, int klen,
- pem_password_cb *callback, void *u)
- {
- EVP_CIPHER_CTX ctx;
- int dsize=0,i,j,ret=0;
- unsigned char *p,*data=NULL;
- const char *objstr=NULL;
- char buf[PEM_BUFSIZE];
- unsigned char key[EVP_MAX_KEY_LENGTH];
- unsigned char iv[EVP_MAX_IV_LENGTH];
-
- if (enc != NULL)
- {
- objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
- if (objstr == NULL)
- {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
- goto err;
- }
- }
-
- if ((dsize=i2d(x,NULL)) < 0)
- {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
- dsize=0;
- goto err;
- }
- /* dzise + 8 bytes are needed */
- data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
- if (data == NULL)
- {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- p=data;
- i=i2d(x,&p);
-
- if (enc != NULL)
- {
- if (kstr == NULL)
- {
- if (callback == NULL)
- klen=def_callback(buf,PEM_BUFSIZE,1,u);
- else
- klen=(*callback)(buf,PEM_BUFSIZE,1,u);
- if (klen <= 0)
- {
- PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
- goto err;
- }
+int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
+ void *x, const EVP_CIPHER *enc, unsigned char *kstr,
+ int klen, pem_password_cb *callback, void *u)
+{
+ EVP_CIPHER_CTX *ctx = NULL;
+ int dsize = 0, i = 0, j = 0, ret = 0;
+ unsigned char *p, *data = NULL;
+ const char *objstr = NULL;
+ char buf[PEM_BUFSIZE];
+ unsigned char key[EVP_MAX_KEY_LENGTH];
+ unsigned char iv[EVP_MAX_IV_LENGTH];
+
+ if (enc != NULL) {
+ objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
+ if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0
+ || EVP_CIPHER_iv_length(enc) > (int)sizeof(iv)
+ /*
+ * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n"
+ * fits into buf
+ */
+ || (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13)
+ > sizeof(buf)) {
+ PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
+ goto err;
+ }
+ }
+
+ if ((dsize = i2d(x, NULL)) < 0) {
+ PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
+ dsize = 0;
+ goto err;
+ }
+ /* dsize + 8 bytes are needed */
+ /* actually it needs the cipher block size extra... */
+ data = OPENSSL_malloc((unsigned int)dsize + 20);
+ if (data == NULL) {
+ PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ p = data;
+ i = i2d(x, &p);
+
+ if (enc != NULL) {
+ if (kstr == NULL) {
+ if (callback == NULL)
+ klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
+ else
+ klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
+ if (klen <= 0) {
+ PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
+ goto err;
+ }
#ifdef CHARSET_EBCDIC
- /* Convert the pass phrase from EBCDIC */
- ebcdic2ascii(buf, buf, klen);
+ /* Convert the pass phrase from EBCDIC */
+ ebcdic2ascii(buf, buf, klen);
#endif
- kstr=(unsigned char *)buf;
- }
- RAND_add(data,i,0);/* put in the RSA key. */
- if (RAND_pseudo_bytes(iv,8) < 0) /* Generate a salt */
- goto err;
- /* The 'iv' is used as the iv and as a salt. It is
- * NOT taken from the BytesToKey function */
- EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
-
- if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
-
- buf[0]='\0';
- PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
- PEM_dek_info(buf,objstr,8,(char *)iv);
- /* k=strlen(buf); */
-
- EVP_EncryptInit(&ctx,enc,key,iv);
- EVP_EncryptUpdate(&ctx,data,&j,data,i);
- EVP_EncryptFinal(&ctx,&(data[j]),&i);
- i+=j;
- ret=1;
- }
- else
- {
- ret=1;
- buf[0]='\0';
- }
- i=PEM_write_bio(bp,name,buf,data,i);
- if (i <= 0) ret=0;
-err:
- memset(key,0,sizeof(key));
- memset(iv,0,sizeof(iv));
- memset((char *)&ctx,0,sizeof(ctx));
- memset(buf,0,PEM_BUFSIZE);
- memset(data,0,(unsigned int)dsize);
- OPENSSL_free(data);
- return(ret);
- }
+ kstr = (unsigned char *)buf;
+ }
+ if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
+ goto err;
+ /*
+ * The 'iv' is used as the iv and as a salt. It is NOT taken from
+ * the BytesToKey function
+ */
+ if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
+ goto err;
+
+ if (kstr == (unsigned char *)buf)
+ OPENSSL_cleanse(buf, PEM_BUFSIZE);
+
+ buf[0] = '\0';
+ PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
+ PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
+ /* k=strlen(buf); */
+
+ ret = 1;
+ if ((ctx = EVP_CIPHER_CTX_new()) == NULL
+ || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
+ || !EVP_EncryptUpdate(ctx, data, &j, data, i)
+ || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
+ ret = 0;
+ if (ret == 0)
+ goto err;
+ i += j;
+ } else {
+ ret = 1;
+ buf[0] = '\0';
+ }
+ i = PEM_write_bio(bp, name, buf, data, i);
+ if (i <= 0)
+ ret = 0;
+ err:
+ OPENSSL_cleanse(key, sizeof(key));
+ OPENSSL_cleanse(iv, sizeof(iv));
+ EVP_CIPHER_CTX_free(ctx);
+ OPENSSL_cleanse(buf, PEM_BUFSIZE);
+ OPENSSL_clear_free(data, (unsigned int)dsize);
+ return ret;
+}
int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
- pem_password_cb *callback,void *u)
- {
- int i,j,o,klen;
- long len;
- EVP_CIPHER_CTX ctx;
- unsigned char key[EVP_MAX_KEY_LENGTH];
- char buf[PEM_BUFSIZE];
-
- len= *plen;
-
- if (cipher->cipher == NULL) return(1);
- if (callback == NULL)
- klen=def_callback(buf,PEM_BUFSIZE,0,u);
- else
- klen=callback(buf,PEM_BUFSIZE,0,u);
- if (klen <= 0)
- {
- PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
- return(0);
- }
+ pem_password_cb *callback, void *u)
+{
+ int ok;
+ int keylen;
+ long len = *plen;
+ int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
+ EVP_CIPHER_CTX *ctx;
+ unsigned char key[EVP_MAX_KEY_LENGTH];
+ char buf[PEM_BUFSIZE];
+
+#if LONG_MAX > INT_MAX
+ /* Check that we did not truncate the length */
+ if (len > INT_MAX) {
+ PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
+ return 0;
+ }
+#endif
+
+ if (cipher->cipher == NULL)
+ return 1;
+ if (callback == NULL)
+ keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
+ else
+ keylen = callback(buf, PEM_BUFSIZE, 0, u);
+ if (keylen < 0) {
+ PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
+ return 0;
+ }
#ifdef CHARSET_EBCDIC
- /* Convert the pass phrase from EBCDIC */
- ebcdic2ascii(buf, buf, klen);
+ /* Convert the pass phrase from EBCDIC */
+ ebcdic2ascii(buf, buf, keylen);
#endif
- EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
- (unsigned char *)buf,klen,1,key,NULL);
-
- j=(int)len;
- EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
- EVP_DecryptUpdate(&ctx,data,&i,data,j);
- o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
- EVP_CIPHER_CTX_cleanup(&ctx);
- memset((char *)buf,0,sizeof(buf));
- memset((char *)key,0,sizeof(key));
- j+=i;
- if (!o)
- {
- PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
- return(0);
- }
- *plen=j;
- return(1);
- }
+ if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
+ (unsigned char *)buf, keylen, 1, key, NULL))
+ return 0;
+
+ ctx = EVP_CIPHER_CTX_new();
+ if (ctx == NULL)
+ return 0;
+
+ ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
+ if (ok)
+ ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
+ if (ok) {
+ /* Squirrel away the length of data decrypted so far. */
+ *plen = ilen;
+ ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
+ }
+ if (ok)
+ *plen += ilen;
+ else
+ PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
+
+ EVP_CIPHER_CTX_free(ctx);
+ OPENSSL_cleanse((char *)buf, sizeof(buf));
+ OPENSSL_cleanse((char *)key, sizeof(key));
+ return ok;
+}
+/*
+ * This implements a very limited PEM header parser that does not support the
+ * full grammar of rfc1421. In particular, folded headers are not supported,
+ * nor is additional whitespace.
+ *
+ * A robust implementation would make use of a library that turns the headers
+ * into a BIO from which one folded line is read at a time, and is then split
+ * into a header label and content. We would then parse the content of the
+ * headers we care about. This is overkill for just this limited use-case, but
+ * presumably we also parse rfc822-style headers for S/MIME, so a common
+ * abstraction might well be more generally useful.
+ */
int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
- {
- int o;
- const EVP_CIPHER *enc=NULL;
- char *p,c;
-
- cipher->cipher=NULL;
- if ((header == NULL) || (*header == '\0') || (*header == '\n'))
- return(1);
- if (strncmp(header,"Proc-Type: ",11) != 0)
- { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
- header+=11;
- if (*header != '4') return(0); header++;
- if (*header != ',') return(0); header++;
- if (strncmp(header,"ENCRYPTED",9) != 0)
- { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
- for (; (*header != '\n') && (*header != '\0'); header++)
- ;
- if (*header == '\0')
- { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
- header++;
- if (strncmp(header,"DEK-Info: ",10) != 0)
- { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
- header+=10;
-
- p=header;
- for (;;)
- {
- c= *header;
-#ifndef CHARSET_EBCDIC
- if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
- ((c >= '0') && (c <= '9'))))
- break;
-#else
- if (!( isupper(c) || (c == '-') ||
- isdigit(c)))
- break;
-#endif
- header++;
- }
- *header='\0';
- o=OBJ_sn2nid(p);
- cipher->cipher=enc=EVP_get_cipherbyname(p);
- *header=c;
- header++;
-
- if (enc == NULL)
- {
- PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
- return(0);
- }
- if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
-
- return(1);
- }
-
-static int load_iv(unsigned char **fromp, unsigned char *to, int num)
- {
- int v,i;
- unsigned char *from;
-
- from= *fromp;
- for (i=0; i<num; i++) to[i]=0;
- num*=2;
- for (i=0; i<num; i++)
- {
- if ((*from >= '0') && (*from <= '9'))
- v= *from-'0';
- else if ((*from >= 'A') && (*from <= 'F'))
- v= *from-'A'+10;
- else if ((*from >= 'a') && (*from <= 'f'))
- v= *from-'a'+10;
- else
- {
- PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
- return(0);
- }
- from++;
- to[i/2]|=v<<(long)((!(i&1))*4);
- }
-
- *fromp=from;
- return(1);
- }
-
-#ifndef NO_FP_API
-int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
- long len)
- {
- BIO *b;
- int ret;
-
- if ((b=BIO_new(BIO_s_file())) == NULL)
- {
- PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
- return(0);
- }
- BIO_set_fp(b,fp,BIO_NOCLOSE);
- ret=PEM_write_bio(b, name, header, data,len);
- BIO_free(b);
- return(ret);
- }
-#endif
-
-int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
- long len)
- {
- int nlen,n,i,j,outl;
- unsigned char *buf;
- EVP_ENCODE_CTX ctx;
- int reason=ERR_R_BUF_LIB;
-
- EVP_EncodeInit(&ctx);
- nlen=strlen(name);
-
- if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
- (BIO_write(bp,name,nlen) != nlen) ||
- (BIO_write(bp,"-----\n",6) != 6))
- goto err;
-
- i=strlen(header);
- if (i > 0)
- {
- if ( (BIO_write(bp,header,i) != i) ||
- (BIO_write(bp,"\n",1) != 1))
- goto err;
- }
-
- buf=(unsigned char *)OPENSSL_malloc(PEM_BUFSIZE*8);
- if (buf == NULL)
- {
- reason=ERR_R_MALLOC_FAILURE;
- goto err;
- }
-
- i=j=0;
- while (len > 0)
- {
- n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
- EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
- if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
- goto err;
- i+=outl;
- len-=n;
- j+=n;
- }
- EVP_EncodeFinal(&ctx,buf,&outl);
- if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
- OPENSSL_free(buf);
- if ( (BIO_write(bp,"-----END ",9) != 9) ||
- (BIO_write(bp,name,nlen) != nlen) ||
- (BIO_write(bp,"-----\n",6) != 6))
- goto err;
- return(i+outl);
-err:
- PEMerr(PEM_F_PEM_WRITE_BIO,reason);
- return(0);
- }
+{
+ static const char ProcType[] = "Proc-Type:";
+ static const char ENCRYPTED[] = "ENCRYPTED";
+ static const char DEKInfo[] = "DEK-Info:";
+ const EVP_CIPHER *enc = NULL;
+ int ivlen;
+ char *dekinfostart, c;
+
+ cipher->cipher = NULL;
+ if ((header == NULL) || (*header == '\0') || (*header == '\n'))
+ return 1;
+
+ if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
+ return 0;
+ }
+ header += sizeof(ProcType)-1;
+ header += strspn(header, " \t");
+
+ if (*header++ != '4' || *header++ != ',')
+ return 0;
+ header += strspn(header, " \t");
+
+ /* We expect "ENCRYPTED" followed by optional white-space + line break */
+ if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
+ strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
+ return 0;
+ }
+ header += sizeof(ENCRYPTED)-1;
+ header += strspn(header, " \t\r");
+ if (*header++ != '\n') {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
+ return 0;
+ }
+
+ /*-
+ * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
+ * We expect "DEK-Info: algo[,hex-parameters]"
+ */
+ if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
+ return 0;
+ }
+ header += sizeof(DEKInfo)-1;
+ header += strspn(header, " \t");
+
+ /*
+ * DEK-INFO is a comma-separated combination of algorithm name and optional
+ * parameters.
+ */
+ dekinfostart = header;
+ header += strcspn(header, " \t,");
+ c = *header;
+ *header = '\0';
+ cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
+ *header = c;
+ header += strspn(header, " \t");
+
+ if (enc == NULL) {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
+ return 0;
+ }
+ ivlen = EVP_CIPHER_iv_length(enc);
+ if (ivlen > 0 && *header++ != ',') {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
+ return 0;
+ } else if (ivlen == 0 && *header == ',') {
+ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
+ return 0;
+ }
+
+ if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
+ return 0;
+
+ return 1;
+}
-#ifndef NO_FP_API
-int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
- long *len)
- {
- BIO *b;
- int ret;
-
- if ((b=BIO_new(BIO_s_file())) == NULL)
- {
- PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
- return(0);
- }
- BIO_set_fp(b,fp,BIO_NOCLOSE);
- ret=PEM_read_bio(b, name, header, data,len);
- BIO_free(b);
- return(ret);
+static int load_iv(char **fromp, unsigned char *to, int num)
+{
+ int v, i;
+ char *from;
+
+ from = *fromp;
+ for (i = 0; i < num; i++)
+ to[i] = 0;
+ num *= 2;
+ for (i = 0; i < num; i++) {
+ v = OPENSSL_hexchar2int(*from);
+ if (v < 0) {
+ PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
+ return 0;
}
-#endif
+ from++;
+ to[i / 2] |= v << (long)((!(i & 1)) * 4);
+ }
-int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
- long *len)
- {
- EVP_ENCODE_CTX ctx;
- int end=0,i,k,bl=0,hl=0,nohead=0;
- char buf[256];
- BUF_MEM *nameB;
- BUF_MEM *headerB;
- BUF_MEM *dataB,*tmpB;
-
- nameB=BUF_MEM_new();
- headerB=BUF_MEM_new();
- dataB=BUF_MEM_new();
- if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
- {
- PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
- return(0);
- }
-
- buf[254]='\0';
- for (;;)
- {
- i=BIO_gets(bp,buf,254);
-
- if (i <= 0)
- {
- PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
- goto err;
- }
-
- while ((i >= 0) && (buf[i] <= ' ')) i--;
- buf[++i]='\n'; buf[++i]='\0';
-
- if (strncmp(buf,"-----BEGIN ",11) == 0)
- {
- i=strlen(&(buf[11]));
-
- if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
- continue;
- if (!BUF_MEM_grow(nameB,i+9))
- {
- PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- memcpy(nameB->data,&(buf[11]),i-6);
- nameB->data[i-6]='\0';
- break;
- }
- }
- hl=0;
- if (!BUF_MEM_grow(headerB,256))
- { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
- headerB->data[0]='\0';
- for (;;)
- {
- i=BIO_gets(bp,buf,254);
- if (i <= 0) break;
-
- while ((i >= 0) && (buf[i] <= ' ')) i--;
- buf[++i]='\n'; buf[++i]='\0';
-
- if (buf[0] == '\n') break;
- if (!BUF_MEM_grow(headerB,hl+i+9))
- { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
- if (strncmp(buf,"-----END ",9) == 0)
- {
- nohead=1;
- break;
- }
- memcpy(&(headerB->data[hl]),buf,i);
- headerB->data[hl+i]='\0';
- hl+=i;
- }
-
- bl=0;
- if (!BUF_MEM_grow(dataB,1024))
- { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
- dataB->data[0]='\0';
- if (!nohead)
- {
- for (;;)
- {
- i=BIO_gets(bp,buf,254);
- if (i <= 0) break;
-
- while ((i >= 0) && (buf[i] <= ' ')) i--;
- buf[++i]='\n'; buf[++i]='\0';
-
- if (i != 65) end=1;
- if (strncmp(buf,"-----END ",9) == 0)
- break;
- if (i > 65) break;
- if (!BUF_MEM_grow(dataB,i+bl+9))
- {
- PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- memcpy(&(dataB->data[bl]),buf,i);
- dataB->data[bl+i]='\0';
- bl+=i;
- if (end)
- {
- buf[0]='\0';
- i=BIO_gets(bp,buf,254);
- if (i <= 0) break;
-
- while ((i >= 0) && (buf[i] <= ' ')) i--;
- buf[++i]='\n'; buf[++i]='\0';
-
- break;
- }
- }
- }
- else
- {
- tmpB=headerB;
- headerB=dataB;
- dataB=tmpB;
- bl=hl;
- }
- i=strlen(nameB->data);
- if ( (strncmp(buf,"-----END ",9) != 0) ||
- (strncmp(nameB->data,&(buf[9]),i) != 0) ||
- (strncmp(&(buf[9+i]),"-----\n",6) != 0))
- {
- PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
- goto err;
- }
-
- EVP_DecodeInit(&ctx);
- i=EVP_DecodeUpdate(&ctx,
- (unsigned char *)dataB->data,&bl,
- (unsigned char *)dataB->data,bl);
- if (i < 0)
- {
- PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
- goto err;
- }
- i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
- if (i < 0)
- {
- PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
- goto err;
- }
- bl+=k;
-
- if (bl == 0) goto err;
- *name=nameB->data;
- *header=headerB->data;
- *data=(unsigned char *)dataB->data;
- *len=bl;
- OPENSSL_free(nameB);
- OPENSSL_free(headerB);
- OPENSSL_free(dataB);
- return(1);
-err:
- BUF_MEM_free(nameB);
- BUF_MEM_free(headerB);
- BUF_MEM_free(dataB);
- return(0);
- }
-
-/* These functions write a private key in PKCS#8 format: it is a "drop in"
- * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
- * is NULL then it uses the unencrypted private key form. The 'nid' versions
- * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
- */
+ *fromp = from;
+ return 1;
+}
-int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
+#ifndef OPENSSL_NO_STDIO
+int PEM_write(FILE *fp, const char *name, const char *header,
+ const unsigned char *data, long len)
{
- return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
+ BIO *b;
+ int ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL) {
+ PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
+ return 0;
+ }
+ BIO_set_fp(b, fp, BIO_NOCLOSE);
+ ret = PEM_write_bio(b, name, header, data, len);
+ BIO_free(b);
+ return ret;
}
+#endif
-int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
+int PEM_write_bio(BIO *bp, const char *name, const char *header,
+ const unsigned char *data, long len)
{
- return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
+ int nlen, n, i, j, outl;
+ unsigned char *buf = NULL;
+ EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
+ int reason = ERR_R_BUF_LIB;
+ int retval = 0;
+
+ if (ctx == NULL) {
+ reason = ERR_R_MALLOC_FAILURE;
+ goto err;
+ }
+
+ EVP_EncodeInit(ctx);
+ nlen = strlen(name);
+
+ if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
+ (BIO_write(bp, name, nlen) != nlen) ||
+ (BIO_write(bp, "-----\n", 6) != 6))
+ goto err;
+
+ i = strlen(header);
+ if (i > 0) {
+ if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
+ goto err;
+ }
+
+ buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
+ if (buf == NULL) {
+ reason = ERR_R_MALLOC_FAILURE;
+ goto err;
+ }
+
+ i = j = 0;
+ while (len > 0) {
+ n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
+ if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
+ goto err;
+ if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
+ goto err;
+ i += outl;
+ len -= n;
+ j += n;
+ }
+ EVP_EncodeFinal(ctx, buf, &outl);
+ if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
+ goto err;
+ if ((BIO_write(bp, "-----END ", 9) != 9) ||
+ (BIO_write(bp, name, nlen) != nlen) ||
+ (BIO_write(bp, "-----\n", 6) != 6))
+ goto err;
+ retval = i + outl;
+
+ err:
+ if (retval == 0)
+ PEMerr(PEM_F_PEM_WRITE_BIO, reason);
+ EVP_ENCODE_CTX_free(ctx);
+ OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
+ return retval;
}
-int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
+#ifndef OPENSSL_NO_STDIO
+int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
+ long *len)
{
- return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
+ BIO *b;
+ int ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL) {
+ PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
+ return 0;
+ }
+ BIO_set_fp(b, fp, BIO_NOCLOSE);
+ ret = PEM_read_bio(b, name, header, data, len);
+ BIO_free(b);
+ return ret;
}
+#endif
-int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
+/* Some helpers for PEM_read_bio_ex(). */
+static int sanitize_line(char *linebuf, int len, unsigned int flags)
{
- return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
+ int i;
+
+ if (flags & PEM_FLAG_EAY_COMPATIBLE) {
+ /* Strip trailing whitespace */
+ while ((len >= 0) && (linebuf[len] <= ' '))
+ len--;
+ /* Go back to whitespace before applying uniform line ending. */
+ len++;
+ } else if (flags & PEM_FLAG_ONLY_B64) {
+ for (i = 0; i < len; ++i) {
+ if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n'
+ || linebuf[i] == '\r')
+ break;
+ }
+ len = i;
+ } else {
+ /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip
+ * control characters in-place and let everything through. */
+ for (i = 0; i < len; ++i) {
+ if (linebuf[i] == '\n' || linebuf[i] == '\r')
+ break;
+ if (ossl_iscntrl(linebuf[i]))
+ linebuf[i] = ' ';
+ }
+ len = i;
+ }
+ /* The caller allocated LINESIZE+1, so this is safe. */
+ linebuf[len++] = '\n';
+ linebuf[len] = '\0';
+ return len;
}
-static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
+#define LINESIZE 255
+/* Note trailing spaces for begin and end. */
+static const char beginstr[] = "-----BEGIN ";
+static const char endstr[] = "-----END ";
+static const char tailstr[] = "-----\n";
+#define BEGINLEN ((int)(sizeof(beginstr) - 1))
+#define ENDLEN ((int)(sizeof(endstr) - 1))
+#define TAILLEN ((int)(sizeof(tailstr) - 1))
+static int get_name(BIO *bp, char **name, unsigned int flags)
{
- X509_SIG *p8;
- PKCS8_PRIV_KEY_INFO *p8inf;
- char buf[PEM_BUFSIZE];
- int ret;
- if(!(p8inf = EVP_PKEY2PKCS8(x))) {
- PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
- PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
- return 0;
- }
- if(enc || (nid != -1)) {
- if(!kstr) {
- if(!cb) klen = def_callback(buf, PEM_BUFSIZE, 1, u);
- else klen = cb(buf, PEM_BUFSIZE, 1, u);
- if(klen <= 0) {
- PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
- PEM_R_READ_KEY);
- PKCS8_PRIV_KEY_INFO_free(p8inf);
- return 0;
- }
-
- kstr = buf;
- }
- p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
- if(kstr == buf) memset(buf, 0, klen);
- PKCS8_PRIV_KEY_INFO_free(p8inf);
- if(isder) ret = i2d_PKCS8_bio(bp, p8);
- else ret = PEM_write_bio_PKCS8(bp, p8);
- X509_SIG_free(p8);
- return ret;
- } else {
- if(isder) ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
- else ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
- PKCS8_PRIV_KEY_INFO_free(p8inf);
- return ret;
- }
+ char *linebuf;
+ int ret = 0;
+ int len;
+
+ /*
+ * Need to hold trailing NUL (accounted for by BIO_gets() and the newline
+ * that will be added by sanitize_line() (the extra '1').
+ */
+ linebuf = pem_malloc(LINESIZE + 1, flags);
+ if (linebuf == NULL) {
+ PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ do {
+ len = BIO_gets(bp, linebuf, LINESIZE);
+
+ if (len <= 0) {
+ PEMerr(PEM_F_GET_NAME, PEM_R_NO_START_LINE);
+ goto err;
+ }
+
+ /* Strip trailing garbage and standardize ending. */
+ len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64);
+
+ /* Allow leading empty or non-matching lines. */
+ } while (strncmp(linebuf, beginstr, BEGINLEN) != 0
+ || len < TAILLEN
+ || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0);
+ linebuf[len - TAILLEN] = '\0';
+ len = len - BEGINLEN - TAILLEN + 1;
+ *name = pem_malloc(len, flags);
+ if (*name == NULL) {
+ PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ memcpy(*name, linebuf + BEGINLEN, len);
+ ret = 1;
+
+err:
+ pem_free(linebuf, flags, LINESIZE + 1);
+ return ret;
}
-/* Finally the DER version to read PKCS#8 encrypted private keys. It has to be
- * here to access the default callback.
+/* Keep track of how much of a header we've seen. */
+enum header_status {
+ MAYBE_HEADER,
+ IN_HEADER,
+ POST_HEADER
+};
+
+/**
+ * Extract the optional PEM header, with details on the type of content and
+ * any encryption used on the contents, and the bulk of the data from the bio.
+ * The end of the header is marked by a blank line; if the end-of-input marker
+ * is reached prior to a blank line, there is no header.
+ *
+ * The header and data arguments are BIO** since we may have to swap them
+ * if there is no header, for efficiency.
+ *
+ * We need the name of the PEM-encoded type to verify the end string.
*/
-
-EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
+static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name,
+ unsigned int flags)
{
- PKCS8_PRIV_KEY_INFO *p8inf = NULL;
- X509_SIG *p8 = NULL;
- int klen;
- EVP_PKEY *ret;
- char psbuf[PEM_BUFSIZE];
- p8 = d2i_PKCS8_bio(bp, NULL);
- if(!p8) return NULL;
- if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
- else klen=def_callback(psbuf,PEM_BUFSIZE,0,u);
- if (klen <= 0) {
- PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
- X509_SIG_free(p8);
- return NULL;
- }
- p8inf = PKCS8_decrypt(p8, psbuf, klen);
- X509_SIG_free(p8);
- if(!p8inf) return NULL;
- ret = EVP_PKCS82PKEY(p8inf);
- PKCS8_PRIV_KEY_INFO_free(p8inf);
- if(!ret) return NULL;
- if(x) {
- if(*x) EVP_PKEY_free(*x);
- *x = ret;
- }
- return ret;
-}
+ BIO *tmp = *header;
+ char *linebuf, *p;
+ int len, line, ret = 0, end = 0;
+ /* 0 if not seen (yet), 1 if reading header, 2 if finished header */
+ enum header_status got_header = MAYBE_HEADER;
+ unsigned int flags_mask;
+ size_t namelen;
+
+ /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline
+ * that will be added by sanitize_line() (the extra '1'). */
+ linebuf = pem_malloc(LINESIZE + 1, flags);
+ if (linebuf == NULL) {
+ PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ for (line = 0; ; line++) {
+ flags_mask = ~0u;
+ len = BIO_gets(bp, linebuf, LINESIZE);
+ if (len <= 0) {
+ PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_SHORT_HEADER);
+ goto err;
+ }
-#ifndef NO_FP_API
+ if (got_header == MAYBE_HEADER) {
+ if (memchr(linebuf, ':', len) != NULL)
+ got_header = IN_HEADER;
+ }
+ if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER)
+ flags_mask &= ~PEM_FLAG_ONLY_B64;
+ len = sanitize_line(linebuf, len, flags & flags_mask);
+
+ /* Check for end of header. */
+ if (linebuf[0] == '\n') {
+ if (got_header == POST_HEADER) {
+ /* Another blank line is an error. */
+ PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
+ goto err;
+ }
+ got_header = POST_HEADER;
+ tmp = *data;
+ continue;
+ }
-int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
-{
- return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);
-}
+ /* Check for end of stream (which means there is no header). */
+ if (strncmp(linebuf, endstr, ENDLEN) == 0) {
+ p = linebuf + ENDLEN;
+ namelen = strlen(name);
+ if (strncmp(p, name, namelen) != 0 ||
+ strncmp(p + namelen, tailstr, TAILLEN) != 0) {
+ PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
+ goto err;
+ }
+ if (got_header == MAYBE_HEADER) {
+ *header = *data;
+ *data = tmp;
+ }
+ break;
+ } else if (end) {
+ /* Malformed input; short line not at end of data. */
+ PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE);
+ goto err;
+ }
+ /*
+ * Else, a line of text -- could be header or data; we don't
+ * know yet. Just pass it through.
+ */
+ if (BIO_puts(tmp, linebuf) < 0)
+ goto err;
+ /*
+ * Only encrypted files need the line length check applied.
+ */
+ if (got_header == POST_HEADER) {
+ /* 65 includes the trailing newline */
+ if (len > 65)
+ goto err;
+ if (len < 65)
+ end = 1;
+ }
+ }
-int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
-{
- return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);
+ ret = 1;
+err:
+ pem_free(linebuf, flags, LINESIZE + 1);
+ return ret;
}
-int PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
+/**
+ * Read in PEM-formatted data from the given BIO.
+ *
+ * By nature of the PEM format, all content must be printable ASCII (except
+ * for line endings). Other characters, or lines that are longer than 80
+ * characters, are malformed input and will be rejected.
+ */
+int PEM_read_bio_ex(BIO *bp, char **name_out, char **header,
+ unsigned char **data, long *len_out, unsigned int flags)
{
- return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);
+ EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
+ const BIO_METHOD *bmeth;
+ BIO *headerB = NULL, *dataB = NULL;
+ char *name = NULL;
+ int len, taillen, headerlen, ret = 0;
+ BUF_MEM * buf_mem;
+
+ if (ctx == NULL) {
+ PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ *len_out = 0;
+ *name_out = *header = NULL;
+ *data = NULL;
+ if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) {
+ /* These two are mutually incompatible; bail out. */
+ PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT);
+ goto end;
+ }
+ bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem();
+
+ headerB = BIO_new(bmeth);
+ dataB = BIO_new(bmeth);
+ if (headerB == NULL || dataB == NULL) {
+ PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE);
+ goto end;
+ }
+
+ if (!get_name(bp, &name, flags))
+ goto end;
+ if (!get_header_and_data(bp, &headerB, &dataB, name, flags))
+ goto end;
+
+ EVP_DecodeInit(ctx);
+ BIO_get_mem_ptr(dataB, &buf_mem);
+ len = buf_mem->length;
+ if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len,
+ (unsigned char*)buf_mem->data, len) < 0
+ || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]),
+ &taillen) < 0) {
+ PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE);
+ goto end;
+ }
+ len += taillen;
+ buf_mem->length = len;
+
+ /* There was no data in the PEM file; avoid malloc(0). */
+ if (len == 0)
+ goto end;
+ headerlen = BIO_get_mem_data(headerB, NULL);
+ *header = pem_malloc(headerlen + 1, flags);
+ *data = pem_malloc(len, flags);
+ if (*header == NULL || *data == NULL) {
+ pem_free(*header, flags, 0);
+ pem_free(*data, flags, 0);
+ goto end;
+ }
+ BIO_read(headerB, *header, headerlen);
+ (*header)[headerlen] = '\0';
+ BIO_read(dataB, *data, len);
+ *len_out = len;
+ *name_out = name;
+ name = NULL;
+ ret = 1;
+
+end:
+ EVP_ENCODE_CTX_free(ctx);
+ pem_free(name, flags, 0);
+ BIO_free(headerB);
+ BIO_free(dataB);
+ return ret;
}
-int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
- char *kstr, int klen, pem_password_cb *cb, void *u)
+int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
+ long *len)
{
- return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);
+ return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE);
}
-static int do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
- char *kstr, int klen,
- pem_password_cb *cb, void *u)
-{
- BIO *bp;
- int ret;
- if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
- PEMerr(PEM_F_PEM_F_DO_PK8KEY_FP,ERR_R_BUF_LIB);
- return(0);
- }
- ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);
- BIO_free(bp);
- return ret;
-}
+/*
+ * Check pem string and return prefix length. If for example the pem_str ==
+ * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
+ * string "RSA".
+ */
-EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u)
+int pem_check_suffix(const char *pem_str, const char *suffix)
{
- BIO *bp;
- EVP_PKEY *ret;
- if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
- PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP,ERR_R_BUF_LIB);
- return NULL;
- }
- ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
- BIO_free(bp);
- return ret;
+ int pem_len = strlen(pem_str);
+ int suffix_len = strlen(suffix);
+ const char *p;
+ if (suffix_len + 1 >= pem_len)
+ return 0;
+ p = pem_str + pem_len - suffix_len;
+ if (strcmp(p, suffix))
+ return 0;
+ p--;
+ if (*p != ' ')
+ return 0;
+ return p - pem_str;
}
-
-#endif
projects / openssl.git / blobdiff