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This change adds cipher and digest support into ENGINE using the

Browse Source 
ENGING_TABLE mechanism. The necessary hooks from crypto/evp/ to use this
will be committed shortly.
This commit is contained in:
Geoff Thorpe 2001-09-25 21:28:40 +00:00
parent 50a381b789
commit b370230b78
8 changed files with 381 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
crypto/engine/Makefile.ssl
View File

@ -25,13 +25,13 @@ APPS=
LIB=$(TOP)/libcrypto.a
LIBSRC= eng_err.c eng_lib.c eng_list.c eng_init.c eng_ctrl.c \
eng_table.c eng_pkey.c eng_fat.c eng_all.c \
tb_rsa.c tb_dsa.c tb_dh.c tb_rand.c \
tb_rsa.c tb_dsa.c tb_dh.c tb_rand.c tb_cipher.c tb_digest.c \
eng_openssl.c eng_dyn.c \
hw_atalla.c hw_cswift.c hw_ncipher.c hw_nuron.c hw_ubsec.c \
hw_openbsd_dev_crypto.c
LIBOBJ= eng_err.o eng_lib.o eng_list.o eng_init.o eng_ctrl.o \
eng_table.o eng_pkey.o eng_fat.o eng_all.o \
tb_rsa.o tb_dsa.o tb_dh.o tb_rand.o \
tb_rsa.o tb_dsa.o tb_dh.o tb_rand.o tb_cipher.o tb_digest.o \
eng_openssl.o eng_dyn.o \
hw_atalla.o hw_cswift.o hw_ncipher.o hw_nuron.o hw_ubsec.o \
hw_openbsd_dev_crypto.o
@ -185,10 +185,12 @@ eng_openssl.o: ../../include/openssl/buffer.h ../../include/openssl/crypto.h
eng_openssl.o: ../../include/openssl/dh.h ../../include/openssl/dsa.h
eng_openssl.o: ../../include/openssl/dso.h ../../include/openssl/e_os2.h
eng_openssl.o: ../../include/openssl/engine.h ../../include/openssl/err.h
eng_openssl.o: ../../include/openssl/lhash.h
eng_openssl.o: ../../include/openssl/evp.h ../../include/openssl/lhash.h
eng_openssl.o: ../../include/openssl/obj_mac.h ../../include/openssl/objects.h
eng_openssl.o: ../../include/openssl/opensslconf.h
eng_openssl.o: ../../include/openssl/opensslv.h ../../include/openssl/rand.h
eng_openssl.o: ../../include/openssl/rsa.h ../../include/openssl/safestack.h
eng_openssl.o: ../../include/openssl/rc4.h ../../include/openssl/rsa.h
eng_openssl.o: ../../include/openssl/safestack.h ../../include/openssl/sha.h
eng_openssl.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
eng_openssl.o: ../../include/openssl/types.h ../../include/openssl/ui.h
eng_openssl.o: ../cryptlib.h eng_openssl.c
@ -283,6 +285,19 @@ hw_ubsec.o: ../../include/openssl/rsa.h ../../include/openssl/safestack.h
hw_ubsec.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
hw_ubsec.o: ../../include/openssl/types.h ../../include/openssl/ui.h
hw_ubsec.o: ../cryptlib.h hw_ubsec.c vendor_defns/hw_ubsec.h
tb_cipher.o: ../../include/openssl/asn1.h ../../include/openssl/bio.h
tb_cipher.o: ../../include/openssl/bn.h ../../include/openssl/crypto.h
tb_cipher.o: ../../include/openssl/dh.h ../../include/openssl/dsa.h
tb_cipher.o: ../../include/openssl/e_os2.h ../../include/openssl/engine.h
tb_cipher.o: ../../include/openssl/err.h ../../include/openssl/evp.h
tb_cipher.o: ../../include/openssl/lhash.h ../../include/openssl/obj_mac.h
tb_cipher.o: ../../include/openssl/objects.h
tb_cipher.o: ../../include/openssl/opensslconf.h
tb_cipher.o: ../../include/openssl/opensslv.h ../../include/openssl/rand.h
tb_cipher.o: ../../include/openssl/rsa.h ../../include/openssl/safestack.h
tb_cipher.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
tb_cipher.o: ../../include/openssl/types.h ../../include/openssl/ui.h eng_int.h
tb_cipher.o: tb_cipher.c
tb_dh.o: ../../include/openssl/asn1.h ../../include/openssl/bio.h
tb_dh.o: ../../include/openssl/bn.h ../../include/openssl/crypto.h
tb_dh.o: ../../include/openssl/dh.h ../../include/openssl/dsa.h
@ -295,6 +310,19 @@ tb_dh.o: ../../include/openssl/rsa.h ../../include/openssl/safestack.h
tb_dh.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
tb_dh.o: ../../include/openssl/types.h ../../include/openssl/ui.h eng_int.h
tb_dh.o: tb_dh.c
tb_digest.o: ../../include/openssl/asn1.h ../../include/openssl/bio.h
tb_digest.o: ../../include/openssl/bn.h ../../include/openssl/crypto.h
tb_digest.o: ../../include/openssl/dh.h ../../include/openssl/dsa.h
tb_digest.o: ../../include/openssl/e_os2.h ../../include/openssl/engine.h
tb_digest.o: ../../include/openssl/err.h ../../include/openssl/evp.h
tb_digest.o: ../../include/openssl/lhash.h ../../include/openssl/obj_mac.h
tb_digest.o: ../../include/openssl/objects.h
tb_digest.o: ../../include/openssl/opensslconf.h
tb_digest.o: ../../include/openssl/opensslv.h ../../include/openssl/rand.h
tb_digest.o: ../../include/openssl/rsa.h ../../include/openssl/safestack.h
tb_digest.o: ../../include/openssl/stack.h ../../include/openssl/symhacks.h
tb_digest.o: ../../include/openssl/types.h ../../include/openssl/ui.h eng_int.h
tb_digest.o: tb_digest.c
tb_dsa.o: ../../include/openssl/asn1.h ../../include/openssl/bio.h
tb_dsa.o: ../../include/openssl/bn.h ../../include/openssl/crypto.h
tb_dsa.o: ../../include/openssl/dh.h ../../include/openssl/dsa.h

4
crypto/engine/eng_err.c
View File

@ -77,7 +77,9 @@ static ERR_STRING_DATA ENGINE_str_functs[]=
{ERR_PACK(0,ENGINE_F_ENGINE_CTRL_CMD_STRING,0), "ENGINE_ctrl_cmd_string"},
{ERR_PACK(0,ENGINE_F_ENGINE_FINISH,0), "ENGINE_finish"},
{ERR_PACK(0,ENGINE_F_ENGINE_FREE,0), "ENGINE_free"},
{ERR_PACK(0,ENGINE_F_ENGINE_GET_CIPHER,0), "ENGINE_get_cipher"},
{ERR_PACK(0,ENGINE_F_ENGINE_GET_DEFAULT_TYPE,0), "ENGINE_GET_DEFAULT_TYPE"},
{ERR_PACK(0,ENGINE_F_ENGINE_GET_DIGEST,0), "ENGINE_get_digest"},
{ERR_PACK(0,ENGINE_F_ENGINE_GET_NEXT,0), "ENGINE_get_next"},
{ERR_PACK(0,ENGINE_F_ENGINE_GET_PREV,0), "ENGINE_get_prev"},
{ERR_PACK(0,ENGINE_F_ENGINE_INIT,0), "ENGINE_init"},
@ -144,6 +146,8 @@ static ERR_STRING_DATA ENGINE_str_reasons[]=
{ENGINE_R_REQUEST_FALLBACK ,"request fallback"},
{ENGINE_R_RSA_NOT_IMPLEMENTED ,"rsa not implemented"},
{ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL ,"size too large or too small"},
{ENGINE_R_UNIMPLEMENTED_CIPHER ,"unimplemented cipher"},
{ENGINE_R_UNIMPLEMENTED_DIGEST ,"unimplemented digest"},
{ENGINE_R_UNIT_FAILURE ,"unit failure"},
{ENGINE_R_VERSION_INCOMPATIBILITY ,"version incompatibility"},
{0,NULL}

6
crypto/engine/eng_fat.c
View File

@ -60,6 +60,10 @@
int ENGINE_set_default(ENGINE *e, unsigned int flags)
{
if((flags & ENGINE_METHOD_CIPHERS) && !ENGINE_set_default_ciphers(e))
return 0;
if((flags & ENGINE_METHOD_DIGESTS) && !ENGINE_set_default_digests(e))
return 0;
#ifndef OPENSSL_NO_RSA
if((flags & ENGINE_METHOD_RSA) & !ENGINE_set_default_RSA(e))
return 0;
@ -79,6 +83,8 @@ int ENGINE_set_default(ENGINE *e, unsigned int flags)
int ENGINE_register_complete(ENGINE *e)
{
ENGINE_register_ciphers(e);
ENGINE_register_digests(e);
#ifndef OPENSSL_NO_RSA
ENGINE_register_RSA(e);
#endif

7
crypto/engine/eng_int.h
View File

@ -138,6 +138,11 @@ struct engine_st
const DSA_METHOD *dsa_meth;
const DH_METHOD *dh_meth;
const RAND_METHOD *rand_meth;
/* Cipher handling is via this callback */
ENGINE_CIPHERS_PTR ciphers;
/* Digest handling is via this callback */
ENGINE_DIGESTS_PTR digests;
ENGINE_GEN_INT_FUNC_PTR destroy;
@ -157,7 +162,7 @@ struct engine_st
* simply to cope with (de)allocation of this structure. Hence,
* running_ref <= struct_ref at all times. */
int funct_ref;
/* A place to store per-key data */
/* A place to store per-ENGINE data */
CRYPTO_EX_DATA ex_data;
/* Used to maintain the linked-list of engines. */
struct engine_st *prev;

2
crypto/engine/eng_list.c
View File

@ -325,6 +325,8 @@ static void engine_cpy(ENGINE *dest, const ENGINE *src)
dest->dh_meth = src->dh_meth;
#endif
dest->rand_meth = src->rand_meth;
dest->ciphers = src->ciphers;
dest->digests = src->digests;
dest->destroy = src->destroy;
dest->init = src->init;
dest->finish = src->finish;

44
crypto/engine/engine.h
View File

@ -74,6 +74,7 @@
#include <openssl/ui.h>
#include <openssl/symhacks.h>
#include <openssl/err.h>
#include <openssl/types.h>
#ifdef __cplusplus
extern "C" {
@ -96,8 +97,8 @@ typedef void DH_METHOD;
#define ENGINE_METHOD_DSA (unsigned int)0x0002
#define ENGINE_METHOD_DH (unsigned int)0x0004
#define ENGINE_METHOD_RAND (unsigned int)0x0008
#define ENGINE_METHOD_BN_MOD_EXP (unsigned int)0x0010
#define ENGINE_METHOD_BN_MOD_EXP_CRT (unsigned int)0x0020
#define ENGINE_METHOD_CIPHERS (unsigned int)0x0040
#define ENGINE_METHOD_DIGESTS (unsigned int)0x0080
/* Obvious all-or-nothing cases. */
#define ENGINE_METHOD_ALL (unsigned int)0xFFFF
#define ENGINE_METHOD_NONE (unsigned int)0x0000
@ -259,6 +260,20 @@ typedef int (*ENGINE_CTRL_FUNC_PTR)(ENGINE *, int, long, void *, void (*f)());
/* Generic load_key function pointer */
typedef EVP_PKEY * (*ENGINE_LOAD_KEY_PTR)(ENGINE *, const char *,
UI_METHOD *ui_method, void *callback_data);
/* These callback types are for an ENGINE's handler for cipher and digest logic.
* These handlers have these prototypes;
* int foo(ENGINE *e, const EVP_CIPHER **cipher, const int **nids, int nid);
* int foo(ENGINE *e, const EVP_MD **digest, const int **nids, int nid);
* Looking at how to implement these handlers in the case of cipher support, if
* the framework wants the EVP_CIPHER for 'nid', it will call;
* foo(e, &p_evp_cipher, NULL, nid); (return zero for failure)
* If the framework wants a list of supported 'nid's, it will call;
* foo(e, NULL, &p_nids, 0); (returns number of 'nids' or -1 for error)
*/
/* Returns to a pointer to the array of supported cipher 'nid's. If the second
* parameter is non-NULL it is set to the size of the returned array. */
typedef int (*ENGINE_CIPHERS_PTR)(ENGINE *, const EVP_CIPHER **, const int **, int);
typedef int (*ENGINE_DIGESTS_PTR)(ENGINE *, const EVP_MD **, const int **, int);
/* STRUCTURE functions ... all of these functions deal with pointers to ENGINE
* structures where the pointers have a "structural reference". This means that
@ -322,6 +337,14 @@ int ENGINE_register_RAND(ENGINE *e);
void ENGINE_unregister_RAND(ENGINE *e);
void ENGINE_register_all_RAND(void);
int ENGINE_register_ciphers(ENGINE *e);
void ENGINE_unregister_ciphers(ENGINE *e);
void ENGINE_register_all_ciphers(void);
int ENGINE_register_digests(ENGINE *e);
void ENGINE_unregister_digests(ENGINE *e);
void ENGINE_register_all_digests(void);
/* These functions register all support from the above categories. Note, use of
* these functions can result in static linkage of code your application may not
* need. If you only need a subset of functionality, consider using more
@ -393,9 +416,10 @@ int ENGINE_set_finish_function(ENGINE *e, ENGINE_GEN_INT_FUNC_PTR finish_f);
int ENGINE_set_ctrl_function(ENGINE *e, ENGINE_CTRL_FUNC_PTR ctrl_f);
int ENGINE_set_load_privkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpriv_f);
int ENGINE_set_load_pubkey_function(ENGINE *e, ENGINE_LOAD_KEY_PTR loadpub_f);
int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f);
int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f);
int ENGINE_set_flags(ENGINE *e, int flags);
int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns);
int ENGINE_add_cipher(ENGINE *e,const EVP_CIPHER *c);
/* These functions (and the "get" function lower down) allow control over any
* per-structure ENGINE data. */
int ENGINE_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
@ -424,6 +448,10 @@ ENGINE_GEN_INT_FUNC_PTR ENGINE_get_finish_function(const ENGINE *e);
ENGINE_CTRL_FUNC_PTR ENGINE_get_ctrl_function(const ENGINE *e);
ENGINE_LOAD_KEY_PTR ENGINE_get_load_privkey_function(const ENGINE *e);
ENGINE_LOAD_KEY_PTR ENGINE_get_load_pubkey_function(const ENGINE *e);
ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e);
ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e);
const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid);
const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid);
const ENGINE_CMD_DEFN *ENGINE_get_cmd_defns(const ENGINE *e);
int ENGINE_get_flags(const ENGINE *e);
void *ENGINE_get_ex_data(const ENGINE *e, int idx);
@ -466,6 +494,10 @@ ENGINE *ENGINE_get_default_RSA(void);
ENGINE *ENGINE_get_default_DSA(void);
ENGINE *ENGINE_get_default_DH(void);
ENGINE *ENGINE_get_default_RAND(void);
/* These functions can be used to get a functional reference to perform
* ciphering or digesting corresponding to "nid". */
ENGINE *ENGINE_get_cipher_engine(int nid);
ENGINE *ENGINE_get_digest_engine(int nid);
/* This sets a new default ENGINE structure for performing RSA
* operations. If the result is non-zero (success) then the ENGINE
@ -476,6 +508,8 @@ int ENGINE_set_default_RSA(ENGINE *e);
int ENGINE_set_default_DSA(ENGINE *e);
int ENGINE_set_default_DH(ENGINE *e);
int ENGINE_set_default_RAND(ENGINE *e);
int ENGINE_set_default_ciphers(ENGINE *e);
int ENGINE_set_default_digests(ENGINE *e);
/* The combination "set" - the flags are bitwise "OR"d from the
* ENGINE_METHOD_*** defines above. As with the "ENGINE_register_complete()"
@ -604,7 +638,9 @@ void ERR_load_ENGINE_strings(void);
#define ENGINE_F_ENGINE_CTRL_CMD_STRING 171
#define ENGINE_F_ENGINE_FINISH 107
#define ENGINE_F_ENGINE_FREE 108
#define ENGINE_F_ENGINE_GET_CIPHER 185
#define ENGINE_F_ENGINE_GET_DEFAULT_TYPE 177
#define ENGINE_F_ENGINE_GET_DIGEST 186
#define ENGINE_F_ENGINE_GET_NEXT 115
#define ENGINE_F_ENGINE_GET_PREV 116
#define ENGINE_F_ENGINE_INIT 119
@ -668,6 +704,8 @@ void ERR_load_ENGINE_strings(void);
#define ENGINE_R_REQUEST_FALLBACK 118
#define ENGINE_R_RSA_NOT_IMPLEMENTED 141
#define ENGINE_R_SIZE_TOO_LARGE_OR_TOO_SMALL 122
#define ENGINE_R_UNIMPLEMENTED_CIPHER 146
#define ENGINE_R_UNIMPLEMENTED_DIGEST 147
#define ENGINE_R_UNIT_FAILURE 115
#define ENGINE_R_VERSION_INCOMPATIBILITY 145

145
crypto/engine/tb_cipher.c Normal file
View File

@ -0,0 +1,145 @@
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <openssl/evp.h>
#include <openssl/engine.h>
#include "eng_int.h"
/* If this symbol is defined then ENGINE_get_cipher_engine(), the function that
* is used by EVP to hook in cipher code and cache defaults (etc), will display
* brief debugging summaries to stderr with the 'nid'. */
/* #define ENGINE_CIPHER_DEBUG */
static ENGINE_TABLE *cipher_table = NULL;
void ENGINE_unregister_ciphers(ENGINE *e)
{
engine_table_unregister(&cipher_table, e);
}
static void engine_unregister_all_ciphers()
{
engine_table_cleanup(&cipher_table);
}
int ENGINE_register_ciphers(ENGINE *e)
{
if(e->ciphers)
{
const int *nids;
int num_nids = e->ciphers(e, NULL, &nids, 0);
if(num_nids > 0)
return engine_table_register(&cipher_table,
&engine_unregister_all_ciphers, e, nids,
num_nids, 0);
}
return 1;
}
void ENGINE_register_all_ciphers()
{
ENGINE *e;
for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
ENGINE_register_ciphers(e);
}
int ENGINE_set_default_ciphers(ENGINE *e)
{
if(e->ciphers)
{
const int *nids;
int num_nids = e->ciphers(e, NULL, &nids, 0);
if(num_nids > 0)
return engine_table_register(&cipher_table,
&engine_unregister_all_ciphers, e, nids,
num_nids, 1);
}
return 1;
}
/* Exposed API function to get a functional reference from the implementation
* table (ie. try to get a functional reference from the tabled structural
* references) for a given cipher 'nid' */
ENGINE *ENGINE_get_cipher_engine(int nid)
{
return engine_table_select(&cipher_table, nid);
}
/* Obtains a cipher implementation from an ENGINE functional reference */
const EVP_CIPHER *ENGINE_get_cipher(ENGINE *e, int nid)
{
const EVP_CIPHER *ret;
ENGINE_CIPHERS_PTR fn = ENGINE_get_ciphers(e);
if(!fn || !fn(e, &ret, NULL, nid))
{
ENGINEerr(ENGINE_F_ENGINE_GET_CIPHER,
ENGINE_R_UNIMPLEMENTED_CIPHER);
return NULL;
}
return ret;
}
/* Gets the cipher callback from an ENGINE structure */
ENGINE_CIPHERS_PTR ENGINE_get_ciphers(const ENGINE *e)
{
return e->ciphers;
}
/* Sets the cipher callback in an ENGINE structure */
int ENGINE_set_ciphers(ENGINE *e, ENGINE_CIPHERS_PTR f)
{
e->ciphers = f;
return 1;
}

145
crypto/engine/tb_digest.c Normal file
View File

@ -0,0 +1,145 @@
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <openssl/evp.h>
#include <openssl/engine.h>
#include "eng_int.h"
/* If this symbol is defined then ENGINE_get_digest_engine(), the function that
* is used by EVP to hook in digest code and cache defaults (etc), will display
* brief debugging summaries to stderr with the 'nid'. */
/* #define ENGINE_DIGEST_DEBUG */
static ENGINE_TABLE *digest_table = NULL;
void ENGINE_unregister_digests(ENGINE *e)
{
engine_table_unregister(&digest_table, e);
}
static void engine_unregister_all_digests()
{
engine_table_cleanup(&digest_table);
}
int ENGINE_register_digests(ENGINE *e)
{
if(e->digests)
{
const int *nids;
int num_nids = e->digests(e, NULL, &nids, 0);
if(num_nids > 0)
return engine_table_register(&digest_table,
&engine_unregister_all_digests, e, nids,
num_nids, 0);
}
return 1;
}
void ENGINE_register_all_digests()
{
ENGINE *e;
for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
ENGINE_register_digests(e);
}
int ENGINE_set_default_digests(ENGINE *e)
{
if(e->digests)
{
const int *nids;
int num_nids = e->digests(e, NULL, &nids, 0);
if(num_nids > 0)
return engine_table_register(&digest_table,
&engine_unregister_all_digests, e, nids,
num_nids, 1);
}
return 1;
}
/* Exposed API function to get a functional reference from the implementation
* table (ie. try to get a functional reference from the tabled structural
* references) for a given digest 'nid' */
ENGINE *ENGINE_get_digest_engine(int nid)
{
return engine_table_select(&digest_table, nid);
}
/* Obtains a digest implementation from an ENGINE functional reference */
const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid)
{
const EVP_MD *ret;
ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e);
if(!fn || !fn(e, &ret, NULL, nid))
{
ENGINEerr(ENGINE_F_ENGINE_GET_DIGEST,
ENGINE_R_UNIMPLEMENTED_DIGEST);
return NULL;
}
return ret;
}
/* Gets the digest callback from an ENGINE structure */
ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e)
{
return e->digests;
}
/* Sets the digest callback in an ENGINE structure */
int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f)
{
e->digests = f;
return 1;
}