by_dir.c
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上传日期:2020-08-09
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- /* crypto/x509/by_dir.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * 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.]
- */
- #include <stdio.h>
- #include <time.h>
- #include <errno.h>
- #include "cryptlib.h"
- #ifndef NO_SYS_TYPES_H
- # include <sys/types.h>
- #endif
- #ifdef MAC_OS_pre_X
- # include <stat.h>
- #else
- # include <sys/stat.h>
- #endif
- #include <openssl/lhash.h>
- #include <openssl/x509.h>
- typedef struct lookup_dir_st
- {
- BUF_MEM *buffer;
- int num_dirs;
- char **dirs;
- int *dirs_type;
- int num_dirs_alloced;
- } BY_DIR;
- static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
- char **ret);
- static int new_dir(X509_LOOKUP *lu);
- static void free_dir(X509_LOOKUP *lu);
- static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
- static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
- X509_OBJECT *ret);
- X509_LOOKUP_METHOD x509_dir_lookup=
- {
- "Load certs from files in a directory",
- new_dir, /* new */
- free_dir, /* free */
- NULL, /* init */
- NULL, /* shutdown */
- dir_ctrl, /* ctrl */
- get_cert_by_subject, /* get_by_subject */
- NULL, /* get_by_issuer_serial */
- NULL, /* get_by_fingerprint */
- NULL, /* get_by_alias */
- };
- X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
- {
- return(&x509_dir_lookup);
- }
- static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
- char **retp)
- {
- int ret=0;
- BY_DIR *ld;
- char *dir = NULL;
- ld=(BY_DIR *)ctx->method_data;
- switch (cmd)
- {
- case X509_L_ADD_DIR:
- if (argl == X509_FILETYPE_DEFAULT)
- {
- dir=(char *)Getenv(X509_get_default_cert_dir_env());
- if (dir)
- ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
- else
- ret=add_cert_dir(ld,X509_get_default_cert_dir(),
- X509_FILETYPE_PEM);
- if (!ret)
- {
- X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
- }
- }
- else
- ret=add_cert_dir(ld,argp,(int)argl);
- break;
- }
- return(ret);
- }
- static int new_dir(X509_LOOKUP *lu)
- {
- BY_DIR *a;
- if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
- return(0);
- if ((a->buffer=BUF_MEM_new()) == NULL)
- {
- OPENSSL_free(a);
- return(0);
- }
- a->num_dirs=0;
- a->dirs=NULL;
- a->dirs_type=NULL;
- a->num_dirs_alloced=0;
- lu->method_data=(char *)a;
- return(1);
- }
- static void free_dir(X509_LOOKUP *lu)
- {
- BY_DIR *a;
- int i;
- a=(BY_DIR *)lu->method_data;
- for (i=0; i<a->num_dirs; i++)
- if (a->dirs[i] != NULL) OPENSSL_free(a->dirs[i]);
- if (a->dirs != NULL) OPENSSL_free(a->dirs);
- if (a->dirs_type != NULL) OPENSSL_free(a->dirs_type);
- if (a->buffer != NULL) BUF_MEM_free(a->buffer);
- OPENSSL_free(a);
- }
- static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
- {
- int j,len;
- int *ip;
- const char *s,*ss,*p;
- char **pp;
- if (dir == NULL || !*dir)
- {
- X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
- return 0;
- }
- s=dir;
- p=s;
- for (;;)
- {
- if ((*p == LIST_SEPARATOR_CHAR) || (*p == ' '))
- {
- ss=s;
- s=p+1;
- len=(int)(p-ss);
- if (len == 0) continue;
- for (j=0; j<ctx->num_dirs; j++)
- if (strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
- continue;
- if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
- {
- ctx->num_dirs_alloced+=10;
- pp=(char **)OPENSSL_malloc(ctx->num_dirs_alloced*
- sizeof(char *));
- ip=(int *)OPENSSL_malloc(ctx->num_dirs_alloced*
- sizeof(int));
- if ((pp == NULL) || (ip == NULL))
- {
- X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
- return(0);
- }
- memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
- sizeof(char *));
- memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
- sizeof(int));
- if (ctx->dirs != NULL)
- OPENSSL_free(ctx->dirs);
- if (ctx->dirs_type != NULL)
- OPENSSL_free(ctx->dirs_type);
- ctx->dirs=pp;
- ctx->dirs_type=ip;
- }
- ctx->dirs_type[ctx->num_dirs]=type;
- ctx->dirs[ctx->num_dirs]=(char *)OPENSSL_malloc((unsigned int)len+1);
- if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
- strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
- ctx->dirs[ctx->num_dirs][len]=' ';
- ctx->num_dirs++;
- }
- if (*p == ' ') break;
- p++;
- }
- return(1);
- }
- static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
- X509_OBJECT *ret)
- {
- BY_DIR *ctx;
- union {
- struct {
- X509 st_x509;
- X509_CINF st_x509_cinf;
- } x509;
- struct {
- X509_CRL st_crl;
- X509_CRL_INFO st_crl_info;
- } crl;
- } data;
- int ok=0;
- int i,j,k;
- unsigned long h;
- BUF_MEM *b=NULL;
- struct stat st;
- X509_OBJECT stmp,*tmp;
- const char *postfix="";
- if (name == NULL) return(0);
- stmp.type=type;
- if (type == X509_LU_X509)
- {
- data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
- data.x509.st_x509_cinf.subject=name;
- stmp.data.x509= &data.x509.st_x509;
- postfix="";
- }
- else if (type == X509_LU_CRL)
- {
- data.crl.st_crl.crl= &data.crl.st_crl_info;
- data.crl.st_crl_info.issuer=name;
- stmp.data.crl= &data.crl.st_crl;
- postfix="r";
- }
- else
- {
- X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
- goto finish;
- }
- if ((b=BUF_MEM_new()) == NULL)
- {
- X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
- goto finish;
- }
-
- ctx=(BY_DIR *)xl->method_data;
- h=X509_NAME_hash(name);
- for (i=0; i<ctx->num_dirs; i++)
- {
- j=strlen(ctx->dirs[i])+1+8+6+1+1;
- if (!BUF_MEM_grow(b,j))
- {
- X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
- goto finish;
- }
- k=0;
- for (;;)
- {
- char c = '/';
- #ifdef OPENSSL_SYS_VMS
- c = ctx->dirs[i][strlen(ctx->dirs[i])-1];
- if (c != ':' && c != '>' && c != ']')
- {
- /* If no separator is present, we assume the
- directory specifier is a logical name, and
- add a colon. We really should use better
- VMS routines for merging things like this,
- but this will do for now...
- -- Richard Levitte */
- c = ':';
- }
- else
- {
- c = ' ';
- }
- #endif
- if (c == ' ')
- {
- /* This is special. When c == ' ', no
- directory separator should be added. */
- BIO_snprintf(b->data,b->max,
- "%s%08lx.%s%d",ctx->dirs[i],h,
- postfix,k);
- }
- else
- {
- BIO_snprintf(b->data,b->max,
- "%s%c%08lx.%s%d",ctx->dirs[i],c,h,
- postfix,k);
- }
- k++;
- if (stat(b->data,&st) < 0)
- break;
- /* found one. */
- if (type == X509_LU_X509)
- {
- if ((X509_load_cert_file(xl,b->data,
- ctx->dirs_type[i])) == 0)
- break;
- }
- else if (type == X509_LU_CRL)
- {
- if ((X509_load_crl_file(xl,b->data,
- ctx->dirs_type[i])) == 0)
- break;
- }
- /* else case will caught higher up */
- }
- /* we have added it to the cache so now pull
- * it out again */
- CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
- j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
- if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
- else tmp = NULL;
- CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
- if (tmp != NULL)
- {
- ok=1;
- ret->type=tmp->type;
- memcpy(&ret->data,&tmp->data,sizeof(ret->data));
- /* If we were going to up the reference count,
- * we would need to do it on a perl 'type'
- * basis */
- /* CRYPTO_add(&tmp->data.x509->references,1,
- CRYPTO_LOCK_X509);*/
- goto finish;
- }
- }
- finish:
- if (b != NULL) BUF_MEM_free(b);
- return(ok);
- }