/* Written by Ben Laurie <ben@algroup.co.uk> August 2001 */
/* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 1999-2001 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
*
*/
-#ifdef OPENSSL_OPENBSD_DEV_CRYPTO
+#ifndef OPENSSL_OPENBSD_DEV_CRYPTO
+void ENGINE_load_openbsd_dev_crypto(void)
+ {
+ /* This is a NOP unless OPENSSL_OPENBSD_DEV_CRYPTO is defined */
+ return;
+ }
+
+#else /* OPENSSL_OPENBSD_DEV_CRYPTO */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <assert.h>
+#include <sys/ioctl.h>
+#include <crypto/cryptodev.h>
#include <openssl/engine.h>
#include <openssl/evp.h>
#include "eng_int.h"
+/* Maybe this is needed? ... */
+#include "../evp/evp_locl.h"
-static void load_ciphers(ENGINE *e)
- {
- ENGINE_add_cipher(e,EVP_dev_crypto_des_ede3_cbc());
- ENGINE_add_cipher(e,EVP_dev_crypto_rc4());
- }
+/****************************************************/
+/* Declare the normal generic ENGINE stuff here ... */
+
+static int dev_crypto_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
+ const int **nids, int nid);
+static int dev_crypto_digests(ENGINE *e, const EVP_MD **digest,
+ const int **nids, int nid);
-ENGINE *ENGINE_openbsd_dev_crypto(void)
+static const char dev_crypto_id[] = "openbsd_dev_crypto";
+static const char dev_crypto_name[] = "OpenBSD /dev/crypto";
+
+static ENGINE *engine_openbsd_dev_crypto(void)
{
ENGINE *engine=ENGINE_new();
- if(!ENGINE_set_id(engine,"openbsd_dev_crypto") ||
- !ENGINE_set_name(engine,"OpenBSD /dev/crypto"))
+ if(!ENGINE_set_id(engine, dev_crypto_id) ||
+ !ENGINE_set_name(engine, dev_crypto_name) ||
+ !ENGINE_set_ciphers(engine, dev_crypto_ciphers) ||
+ !ENGINE_set_digests(engine, dev_crypto_digests))
{
ENGINE_free(engine);
return NULL;
}
- load_ciphers(engine);
return engine;
}
-#else /* !defined(OPENSSL_OPENBSD_DEV_CRYPTO) */
+void ENGINE_load_openbsd_dev_crypto(void)
+ {
+ /* Copied from eng_[openssl|dyn].c */
+ ENGINE *toadd = engine_openbsd_dev_crypto();
+ if(!toadd) return;
+ ENGINE_add(toadd);
+ ENGINE_free(toadd);
+ ERR_clear_error();
+ }
+
+/******************************************************************************/
+/* Clip in the stuff from crypto/evp/openbsd_hw.c here. NB: What has changed? */
+/* I've removed the exposed EVP_*** functions, they're accessed through the */
+/* "dev_crypto_[ciphers|digests]" handlers. I've also moved the EVP_CIPHER */
+/* and EVP_MD structures to the bottom where they are close to the handlers */
+/* that expose them. What should be done? The global data (file-descriptors, */
+/* etc) should be put into ENGINE's ex_data support, and per-context data */
+/* (also file-descriptors perhaps) should be put into the contexts. Also code */
+/* formatting, fprintf statements, and OpenSSL-style error handling should be */
+/* added (dynamically, like the other ENGINEs). Also, "dynamic" support */
+/* be added to this ENGINE once it's up and running so that it could be built */
+/* as a shared-library. What else? device initialisation should take place */
+/* inside an ENGINE 'init()' handler (and likewise 'finish()'). ciphers and */
+/* digests won't be used by the framework unless the ENGINE has been */
+/* successfully initialised (that's one of the things you get for free) so */
+/* initialisation, including returning failure if device setup fails, can be */
+/* handled quite cleanly. This could presumably handle the opening (and then */
+/* closing inside 'finish()') of the 'cryptodev_fd' file-descriptor). */
+
+/* longest key supported in hardware */
+#define MAX_HW_KEY 24
+#define MAX_HW_IV 8
+
+#define MD5_DIGEST_LENGTH 16
+#define MD5_CBLOCK 64
+
+static int fd;
+static int dev_failed;
+
+typedef struct session_op session_op;
+
+#define CDATA(ctx) EVP_C_DATA(session_op,ctx)
+
+static void err(const char *str)
+ {
+ fprintf(stderr,"%s: errno %d\n",str,errno);
+ }
+
+static int dev_crypto_init(session_op *ses)
+ {
+ if(dev_failed)
+ return 0;
+ if(!fd)
+ {
+ int cryptodev_fd;
+
+ if ((cryptodev_fd=open("/dev/crypto",O_RDWR,0)) < 0)
+ {
+ err("/dev/crypto");
+ dev_failed=1;
+ return 0;
+ }
+ if (ioctl(cryptodev_fd,CRIOGET,&fd) == -1)
+ {
+ err("CRIOGET failed");
+ close(cryptodev_fd);
+ dev_failed=1;
+ return 0;
+ }
+ close(cryptodev_fd);
+ }
+ assert(ses);
+ memset(ses,'\0',sizeof *ses);
+
+ return 1;
+ }
+
+static int dev_crypto_cleanup(EVP_CIPHER_CTX *ctx)
+ {
+ fprintf(stderr,"cleanup %d\n",CDATA(ctx)->ses);
+ if(ioctl(fd,CIOCFSESSION,&CDATA(ctx)->ses) == -1)
+ err("CIOCFSESSION failed");
+
+ OPENSSL_free(CDATA(ctx)->key);
+
+ return 1;
+ }
+
+static int dev_crypto_init_key(EVP_CIPHER_CTX *ctx,int cipher,
+ const unsigned char *key,int klen)
+ {
+ if(!dev_crypto_init(CDATA(ctx)))
+ return 0;
+
+ CDATA(ctx)->key=OPENSSL_malloc(MAX_HW_KEY);
+
+ assert(ctx->cipher->iv_len <= MAX_HW_IV);
+
+ memcpy(CDATA(ctx)->key,key,klen);
+
+ CDATA(ctx)->cipher=cipher;
+ CDATA(ctx)->keylen=klen;
+
+ if (ioctl(fd,CIOCGSESSION,CDATA(ctx)) == -1)
+ {
+ err("CIOCGSESSION failed");
+ return 0;
+ }
+ return 1;
+ }
+
+static int dev_crypto_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
+ const unsigned char *in,unsigned int inl)
+ {
+ struct crypt_op cryp;
+ unsigned char lb[MAX_HW_IV];
+
+ if(!inl)
+ return 1;
+
+ assert(CDATA(ctx));
+ assert(!dev_failed);
+
+ memset(&cryp,'\0',sizeof cryp);
+ cryp.ses=CDATA(ctx)->ses;
+ cryp.op=ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT;
+ cryp.flags=0;
+ cryp.len=inl;
+ assert((inl&(ctx->cipher->block_size-1)) == 0);
+ cryp.src=(caddr_t)in;
+ cryp.dst=(caddr_t)out;
+ cryp.mac=0;
+ if(ctx->cipher->iv_len)
+ cryp.iv=(caddr_t)ctx->iv;
+
+ if(!ctx->encrypt)
+ memcpy(lb,&in[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);
+
+ if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
+ {
+ if(errno == EINVAL) /* buffers are misaligned */
+ {
+ unsigned int cinl=0;
+ char *cin=NULL;
+ char *cout=NULL;
+
+ /* NB: this can only make cinl != inl with stream ciphers */
+ cinl=(inl+3)/4*4;
+
+ if(((unsigned long)in&3) || cinl != inl)
+ {
+ cin=OPENSSL_malloc(cinl);
+ memcpy(cin,in,inl);
+ cryp.src=cin;
+ }
+
+ if(((unsigned long)out&3) || cinl != inl)
+ {
+ cout=OPENSSL_malloc(cinl);
+ cryp.dst=cout;
+ }
+
+ cryp.len=cinl;
+
+ if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
+ {
+ err("CIOCCRYPT(2) failed");
+ printf("src=%p dst=%p\n",cryp.src,cryp.dst);
+ abort();
+ return 0;
+ }
+
+ if(cout)
+ {
+ memcpy(out,cout,inl);
+ OPENSSL_free(cout);
+ }
+ if(cin)
+ OPENSSL_free(cin);
+ }
+ else
+ {
+ err("CIOCCRYPT failed");
+ abort();
+ return 0;
+ }
+ }
+
+ if(ctx->encrypt)
+ memcpy(ctx->iv,&out[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len);
+ else
+ memcpy(ctx->iv,lb,ctx->cipher->iv_len);
+
+ return 1;
+ }
+
+static int dev_crypto_des_ede3_init_key(EVP_CIPHER_CTX *ctx,
+ const unsigned char *key,
+ const unsigned char *iv, int enc)
+ { return dev_crypto_init_key(ctx,CRYPTO_3DES_CBC,key,24); }
-static void *dummy=&dummy;
+static int dev_crypto_rc4_init_key(EVP_CIPHER_CTX *ctx,
+ const unsigned char *key,
+ const unsigned char *iv, int enc)
+ { return dev_crypto_init_key(ctx,CRYPTO_ARC4,key,16); }
+
+typedef struct
+ {
+ session_op sess;
+ char *data;
+ int len;
+ unsigned char md[EVP_MAX_MD_SIZE];
+ } MD_DATA;
+
+static int dev_crypto_init_digest(MD_DATA *md_data,int mac)
+ {
+ if(!dev_crypto_init(&md_data->sess))
+ return 0;
+
+ md_data->len=0;
+ md_data->data=NULL;
+
+ md_data->sess.mac=mac;
+
+ if (ioctl(fd,CIOCGSESSION,&md_data->sess) == -1)
+ {
+ err("CIOCGSESSION failed");
+ return 0;
+ }
+ fprintf(stderr,"opened %d\n",md_data->sess.ses);
+ return 1;
+ }
+
+static int dev_crypto_cleanup_digest(MD_DATA *md_data)
+ {
+ fprintf(stderr,"cleanup %d\n",md_data->sess.ses);
+ if (ioctl(fd,CIOCFSESSION,&md_data->sess.ses) == -1)
+ {
+ err("CIOCFSESSION failed");
+ return 0;
+ }
+
+ return 1;
+ }
+
+/* FIXME: if device can do chained MACs, then don't accumulate */
+/* FIXME: move accumulation to the framework */
+static int dev_crypto_md5_init(EVP_MD_CTX *ctx)
+ { return dev_crypto_init_digest(ctx->md_data,CRYPTO_MD5); }
+
+static int do_digest(int ses,unsigned char *md,const void *data,int len)
+ {
+ struct crypt_op cryp;
+ static unsigned char md5zero[16]=
+ {
+ 0xd4,0x1d,0x8c,0xd9,0x8f,0x00,0xb2,0x04,
+ 0xe9,0x80,0x09,0x98,0xec,0xf8,0x42,0x7e
+ };
+
+ /* some cards can't do zero length */
+ if(!len)
+ {
+ memcpy(md,md5zero,16);
+ return 1;
+ }
+
+ memset(&cryp,'\0',sizeof cryp);
+ cryp.ses=ses;
+ cryp.op=COP_ENCRYPT;/* required to do the MAC rather than check it */
+ cryp.len=len;
+ cryp.src=(caddr_t)data;
+ cryp.dst=(caddr_t)data; // FIXME!!!
+ cryp.mac=(caddr_t)md;
+
+ if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
+ {
+ if(errno == EINVAL) /* buffer is misaligned */
+ {
+ char *dcopy;
+
+ dcopy=OPENSSL_malloc(len);
+ memcpy(dcopy,data,len);
+ cryp.src=dcopy;
+ cryp.dst=cryp.src; // FIXME!!!
+
+ if(ioctl(fd, CIOCCRYPT, &cryp) == -1)
+ {
+ err("CIOCCRYPT(MAC2) failed");
+ abort();
+ return 0;
+ }
+ OPENSSL_free(dcopy);
+ }
+ else
+ {
+ err("CIOCCRYPT(MAC) failed");
+ abort();
+ return 0;
+ }
+ }
+ // printf("done\n");
+
+ return 1;
+ }
+
+static int dev_crypto_md5_update(EVP_MD_CTX *ctx,const void *data,
+ unsigned long len)
+ {
+ MD_DATA *md_data=ctx->md_data;
+
+ if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)
+ return do_digest(md_data->sess.ses,md_data->md,data,len);
+
+ md_data->data=OPENSSL_realloc(md_data->data,md_data->len+len);
+ memcpy(md_data->data+md_data->len,data,len);
+ md_data->len+=len;
+
+ return 1;
+ }
+
+static int dev_crypto_md5_final(EVP_MD_CTX *ctx,unsigned char *md)
+ {
+ int ret;
+ MD_DATA *md_data=ctx->md_data;
+
+ if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)
+ {
+ memcpy(md,md_data->md,MD5_DIGEST_LENGTH);
+ ret=1;
+ }
+ else
+ {
+ ret=do_digest(md_data->sess.ses,md,md_data->data,md_data->len);
+ OPENSSL_free(md_data->data);
+ md_data->data=NULL;
+ md_data->len=0;
+ }
+
+ return ret;
+ }
+
+static int dev_crypto_md5_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from)
+ {
+ const MD_DATA *from_md=from->md_data;
+ MD_DATA *to_md=to->md_data;
+
+ // How do we copy sessions?
+ assert(from->digest->flags&EVP_MD_FLAG_ONESHOT);
+
+ to_md->data=OPENSSL_malloc(from_md->len);
+ memcpy(to_md->data,from_md->data,from_md->len);
+
+ return 1;
+ }
+
+static int dev_crypto_md5_cleanup(EVP_MD_CTX *ctx)
+ {
+ return dev_crypto_cleanup_digest(ctx->md_data);
+ }
+
+/**************************************************************************/
+/* Here are the moved declarations of the EVP_CIPHER and EVP_MD */
+/* implementations. They're down here to be within easy editor-distance */
+/* of the digests and ciphers handler functions. */
+
+#define dev_crypto_des_ede3_cbc_cipher dev_crypto_cipher
+
+BLOCK_CIPHER_def_cbc(dev_crypto_des_ede3, session_op, NID_des_ede3, 8, 24, 8,
+ 0, dev_crypto_des_ede3_init_key,
+ dev_crypto_cleanup,
+ EVP_CIPHER_set_asn1_iv,
+ EVP_CIPHER_get_asn1_iv,
+ NULL)
+
+static const EVP_CIPHER r4_cipher=
+ {
+ NID_rc4,
+ 1,16,0, /* FIXME: key should be up to 256 bytes */
+ EVP_CIPH_VARIABLE_LENGTH,
+ dev_crypto_rc4_init_key,
+ dev_crypto_cipher,
+ dev_crypto_cleanup,
+ sizeof(session_op),
+ NULL,
+ NULL,
+ NULL
+ };
+
+static const EVP_MD md5_md=
+ {
+ NID_md5,
+ NID_md5WithRSAEncryption,
+ MD5_DIGEST_LENGTH,
+ EVP_MD_FLAG_ONESHOT, // XXX: set according to device info...
+ dev_crypto_md5_init,
+ dev_crypto_md5_update,
+ dev_crypto_md5_final,
+ dev_crypto_md5_copy,
+ dev_crypto_md5_cleanup,
+ EVP_PKEY_RSA_method,
+ MD5_CBLOCK,
+ sizeof(MD_DATA),
+ };
+
+/****************************************************************/
+/* Implement the dev_crypto_[ciphers|digests] handlers here ... */
+
+static int cipher_nids[] = {NID_des_ede3_cbc, NID_rc4};
+static int cipher_nids_num = 2;
+static int digest_nids[] = {NID_md5};
+static int digest_nids_num = 1;
+
+static int dev_crypto_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
+ const int **nids, int nid)
+ {
+ if(!cipher)
+ {
+ /* We are returning a list of supported nids */
+ *nids = cipher_nids;
+ return cipher_nids_num;
+ }
+ /* We are being asked for a specific cipher */
+ if(nid == NID_rc4)
+ *cipher = &r4_cipher;
+ else if(nid == NID_des_ede3_cbc)
+ *cipher = &dev_crypto_des_ede3_cbc;
+ else
+ {
+ *cipher = NULL;
+ return 0;
+ }
+ return 1;
+ }
+
+static int dev_crypto_digests(ENGINE *e, const EVP_MD **digest,
+ const int **nids, int nid)
+ {
+ if(!digest)
+ {
+ /* We are returning a list of supported nids */
+ *nids = digest_nids;
+ return digest_nids_num;
+ }
+ /* We are being asked for a specific digest */
+ if(nid == NID_md5)
+ *digest = &md5_md;
+ else
+ {
+ *digest = NULL;
+ return 0;
+ }
+ return 1;
+ }
-#endif /* !defined(OPENSSL_OPENBSD_DEV_CRYPTO) */
+#endif /* OPENSSL_OPENBSD_DEV_CRYPTO */
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