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852 lines
20 KiB
852 lines
20 KiB
/* crypto/pem/pem_lib.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include "cryptlib.h"
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#include <openssl/buffer.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/rand.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/pkcs12.h>
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#include "asn1_locl.h"
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#ifndef OPENSSL_NO_DES
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#include <openssl/des.h>
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#endif
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#ifndef OPENSSL_NO_ENGINE
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#include <openssl/engine.h>
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#endif
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const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
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#define MIN_LENGTH 4
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static int load_iv(char **fromp,unsigned char *to, int num);
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static int check_pem(const char *nm, const char *name);
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int pem_check_suffix(const char *pem_str, const char *suffix);
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int PEM_def_callback(char *buf, int num, int w, void *key)
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{
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#ifdef OPENSSL_NO_FP_API
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/* We should not ever call the default callback routine from
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* windows. */
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PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
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return(-1);
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#else
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int i,j;
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const char *prompt;
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if(key) {
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i=strlen(key);
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i=(i > num)?num:i;
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memcpy(buf,key,i);
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return(i);
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}
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prompt=EVP_get_pw_prompt();
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if (prompt == NULL)
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prompt="Enter PEM pass phrase:";
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for (;;)
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{
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i=EVP_read_pw_string_min(buf,MIN_LENGTH,num,prompt,w);
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if (i != 0)
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{
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PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
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memset(buf,0,(unsigned int)num);
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return(-1);
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}
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j=strlen(buf);
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if (j < MIN_LENGTH)
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{
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fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
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}
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else
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break;
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}
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return(j);
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#endif
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}
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void PEM_proc_type(char *buf, int type)
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{
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const char *str;
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if (type == PEM_TYPE_ENCRYPTED)
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str="ENCRYPTED";
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else if (type == PEM_TYPE_MIC_CLEAR)
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str="MIC-CLEAR";
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else if (type == PEM_TYPE_MIC_ONLY)
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str="MIC-ONLY";
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else
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str="BAD-TYPE";
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BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);
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BUF_strlcat(buf,str,PEM_BUFSIZE);
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BUF_strlcat(buf,"\n",PEM_BUFSIZE);
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}
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void PEM_dek_info(char *buf, const char *type, int len, char *str)
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{
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static const unsigned char map[17]="0123456789ABCDEF";
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long i;
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int j;
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BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);
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BUF_strlcat(buf,type,PEM_BUFSIZE);
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BUF_strlcat(buf,",",PEM_BUFSIZE);
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j=strlen(buf);
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if (j + (len * 2) + 1 > PEM_BUFSIZE)
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return;
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for (i=0; i<len; i++)
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{
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buf[j+i*2] =map[(str[i]>>4)&0x0f];
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buf[j+i*2+1]=map[(str[i] )&0x0f];
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}
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buf[j+i*2]='\n';
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buf[j+i*2+1]='\0';
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}
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#ifndef OPENSSL_NO_FP_API
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void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
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pem_password_cb *cb, void *u)
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{
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BIO *b;
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void *ret;
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if ((b=BIO_new(BIO_s_file())) == NULL)
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{
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PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
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return(0);
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}
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BIO_set_fp(b,fp,BIO_NOCLOSE);
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ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
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BIO_free(b);
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return(ret);
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}
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#endif
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static int check_pem(const char *nm, const char *name)
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{
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/* Normal matching nm and name */
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if (!strcmp(nm,name)) return 1;
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/* Make PEM_STRING_EVP_PKEY match any private key */
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if(!strcmp(name,PEM_STRING_EVP_PKEY))
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{
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int slen;
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const EVP_PKEY_ASN1_METHOD *ameth;
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if(!strcmp(nm,PEM_STRING_PKCS8))
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return 1;
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if(!strcmp(nm,PEM_STRING_PKCS8INF))
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return 1;
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slen = pem_check_suffix(nm, "PRIVATE KEY");
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if (slen > 0)
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{
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/* NB: ENGINE implementations wont contain
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* a deprecated old private key decode function
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* so don't look for them.
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*/
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ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
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if (ameth && ameth->old_priv_decode)
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return 1;
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}
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return 0;
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}
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if(!strcmp(name,PEM_STRING_PARAMETERS))
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{
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int slen;
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const EVP_PKEY_ASN1_METHOD *ameth;
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slen = pem_check_suffix(nm, "PARAMETERS");
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if (slen > 0)
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{
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ENGINE *e;
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ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
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if (ameth)
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{
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int r;
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if (ameth->param_decode)
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r = 1;
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else
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r = 0;
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#ifndef OPENSSL_NO_ENGINE
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if (e)
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ENGINE_finish(e);
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#endif
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return r;
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}
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}
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return 0;
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}
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/* Permit older strings */
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if(!strcmp(nm,PEM_STRING_X509_OLD) &&
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!strcmp(name,PEM_STRING_X509)) return 1;
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if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
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!strcmp(name,PEM_STRING_X509_REQ)) return 1;
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/* Allow normal certs to be read as trusted certs */
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if(!strcmp(nm,PEM_STRING_X509) &&
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!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
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if(!strcmp(nm,PEM_STRING_X509_OLD) &&
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!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
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/* Some CAs use PKCS#7 with CERTIFICATE headers */
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if(!strcmp(nm, PEM_STRING_X509) &&
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!strcmp(name, PEM_STRING_PKCS7)) return 1;
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if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
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!strcmp(name, PEM_STRING_PKCS7)) return 1;
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#ifndef OPENSSL_NO_CMS
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if(!strcmp(nm, PEM_STRING_X509) &&
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!strcmp(name, PEM_STRING_CMS)) return 1;
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/* Allow CMS to be read from PKCS#7 headers */
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if(!strcmp(nm, PEM_STRING_PKCS7) &&
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!strcmp(name, PEM_STRING_CMS)) return 1;
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#endif
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return 0;
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}
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int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
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pem_password_cb *cb, void *u)
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{
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EVP_CIPHER_INFO cipher;
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char *nm=NULL,*header=NULL;
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unsigned char *data=NULL;
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long len;
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int ret = 0;
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for (;;)
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{
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if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
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if(ERR_GET_REASON(ERR_peek_error()) ==
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PEM_R_NO_START_LINE)
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ERR_add_error_data(2, "Expecting: ", name);
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return 0;
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}
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if(check_pem(nm, name)) break;
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OPENSSL_free(nm);
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OPENSSL_free(header);
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OPENSSL_free(data);
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}
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if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
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if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
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*pdata = data;
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*plen = len;
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if (pnm)
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*pnm = nm;
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ret = 1;
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err:
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if (!ret || !pnm) OPENSSL_free(nm);
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OPENSSL_free(header);
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if (!ret) OPENSSL_free(data);
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return ret;
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}
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#ifndef OPENSSL_NO_FP_API
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int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
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void *x, const EVP_CIPHER *enc, unsigned char *kstr,
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int klen, pem_password_cb *callback, void *u)
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{
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BIO *b;
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int ret;
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if ((b=BIO_new(BIO_s_file())) == NULL)
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{
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PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
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return(0);
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}
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BIO_set_fp(b,fp,BIO_NOCLOSE);
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ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
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BIO_free(b);
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return(ret);
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}
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#endif
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int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
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void *x, const EVP_CIPHER *enc, unsigned char *kstr,
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int klen, pem_password_cb *callback, void *u)
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{
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EVP_CIPHER_CTX ctx;
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int dsize=0,i,j,ret=0;
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unsigned char *p,*data=NULL;
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const char *objstr=NULL;
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char buf[PEM_BUFSIZE];
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unsigned char key[EVP_MAX_KEY_LENGTH];
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unsigned char iv[EVP_MAX_IV_LENGTH];
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if (enc != NULL)
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{
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objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
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if (objstr == NULL)
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{
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PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
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goto err;
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}
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}
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if ((dsize=i2d(x,NULL)) < 0)
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{
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PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB);
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dsize=0;
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goto err;
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}
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/* dzise + 8 bytes are needed */
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/* actually it needs the cipher block size extra... */
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data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
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if (data == NULL)
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{
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PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
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goto err;
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}
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p=data;
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i=i2d(x,&p);
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if (enc != NULL)
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{
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if (kstr == NULL)
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{
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if (callback == NULL)
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klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
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else
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klen=(*callback)(buf,PEM_BUFSIZE,1,u);
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if (klen <= 0)
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{
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PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
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goto err;
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}
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#ifdef CHARSET_EBCDIC
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/* Convert the pass phrase from EBCDIC */
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ebcdic2ascii(buf, buf, klen);
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#endif
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kstr=(unsigned char *)buf;
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}
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RAND_add(data,i,0);/* put in the RSA key. */
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OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
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if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
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goto err;
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/* The 'iv' is used as the iv and as a salt. It is
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* NOT taken from the BytesToKey function */
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EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
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if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
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OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
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buf[0]='\0';
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PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
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PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
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/* k=strlen(buf); */
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EVP_CIPHER_CTX_init(&ctx);
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EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
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EVP_EncryptUpdate(&ctx,data,&j,data,i);
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EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
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EVP_CIPHER_CTX_cleanup(&ctx);
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i+=j;
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ret=1;
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}
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else
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{
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ret=1;
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buf[0]='\0';
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}
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i=PEM_write_bio(bp,name,buf,data,i);
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if (i <= 0) ret=0;
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err:
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OPENSSL_cleanse(key,sizeof(key));
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OPENSSL_cleanse(iv,sizeof(iv));
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OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
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OPENSSL_cleanse(buf,PEM_BUFSIZE);
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if (data != NULL)
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{
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OPENSSL_cleanse(data,(unsigned int)dsize);
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OPENSSL_free(data);
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}
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return(ret);
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}
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int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
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pem_password_cb *callback,void *u)
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{
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int i,j,o,klen;
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long len;
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EVP_CIPHER_CTX ctx;
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unsigned char key[EVP_MAX_KEY_LENGTH];
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char buf[PEM_BUFSIZE];
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len= *plen;
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if (cipher->cipher == NULL) return(1);
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if (callback == NULL)
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klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
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else
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klen=callback(buf,PEM_BUFSIZE,0,u);
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if (klen <= 0)
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{
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PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
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return(0);
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}
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#ifdef CHARSET_EBCDIC
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/* Convert the pass phrase from EBCDIC */
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ebcdic2ascii(buf, buf, klen);
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#endif
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EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
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(unsigned char *)buf,klen,1,key,NULL);
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j=(int)len;
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EVP_CIPHER_CTX_init(&ctx);
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EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
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EVP_DecryptUpdate(&ctx,data,&i,data,j);
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o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
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EVP_CIPHER_CTX_cleanup(&ctx);
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OPENSSL_cleanse((char *)buf,sizeof(buf));
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OPENSSL_cleanse((char *)key,sizeof(key));
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j+=i;
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if (!o)
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{
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PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
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return(0);
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}
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*plen=j;
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return(1);
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}
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|
|
int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
|
|
{
|
|
const EVP_CIPHER *enc=NULL;
|
|
char *p,c;
|
|
char **header_pp = &header;
|
|
|
|
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';
|
|
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(header_pp,&(cipher->iv[0]),enc->iv_len))
|
|
return(0);
|
|
|
|
return(1);
|
|
}
|
|
|
|
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++)
|
|
{
|
|
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 OPENSSL_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 = NULL;
|
|
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 = 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_cleanse(buf, PEM_BUFSIZE*8);
|
|
OPENSSL_free(buf);
|
|
buf = NULL;
|
|
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:
|
|
if (buf) {
|
|
OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
|
|
OPENSSL_free(buf);
|
|
}
|
|
PEMerr(PEM_F_PEM_WRITE_BIO,reason);
|
|
return(0);
|
|
}
|
|
|
|
#ifndef OPENSSL_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);
|
|
}
|
|
#endif
|
|
|
|
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))
|
|
{
|
|
BUF_MEM_free(nameB);
|
|
BUF_MEM_free(headerB);
|
|
BUF_MEM_free(dataB);
|
|
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_clean(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);
|
|
}
|
|
|
|
/* 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".
|
|
*/
|
|
|
|
int pem_check_suffix(const char *pem_str, const char *suffix)
|
|
{
|
|
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;
|
|
}
|
|
|
|
|