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f6c4bc3b91
or SHA512, the blocksize is 128 bytes, not 64 bytes as anywhere else. The bug also exists in NetBSD, OpenBSD and various other independed implementations I look at. - We cannot decide which hash function to use for HMAC based on the key length, because any HMAC function can use any key length. To fix it split CRYPTO_SHA2_HMAC into three algorithm: CRYPTO_SHA2_256_HMAC, CRYPTO_SHA2_384_HMAC and CRYPTO_SHA2_512_HMAC. Those names are consistent with OpenBSD's naming. - Remove authsize field from auth_hash structure. - Allow consumer to define size of hash he wants to receive. This allows to use HMAC not only for IPsec, where 96 bits MAC is requested. The size of requested MAC is defined at newsession time in the cri_mlen field - when 0, entire MAC will be returned. - Add swcr_authprepare() function which prepares authentication key. - Allow to provide key for every authentication operation, not only at newsession time by honoring CRD_F_KEY_EXPLICIT flag. - Make giving key at newsession time optional - don't try to operate on it if its NULL. - Extend COPYBACK()/COPYDATA() macros to handle CRYPTO_BUF_CONTIG buffer type as well. - Accept CRYPTO_BUF_IOV buffer type in swcr_authcompute() as we have cuio_apply() now. - 16 bits for key length (SW_klen) is more than enough. Reviewed by: sam
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* $FreeBSD$ */
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/* $OpenBSD: cryptosoft.h,v 1.10 2002/04/22 23:10:09 deraadt Exp $ */
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/*-
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* The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
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*
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* This code was written by Angelos D. Keromytis in Athens, Greece, in
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* February 2000. Network Security Technologies Inc. (NSTI) kindly
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* supported the development of this code.
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*
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* Copyright (c) 2000 Angelos D. Keromytis
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*
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* Permission to use, copy, and modify this software with or without fee
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* is hereby granted, provided that this entire notice is included in
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* all source code copies of any software which is or includes a copy or
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* modification of this software.
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*
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
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* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
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* PURPOSE.
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*/
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#ifndef _CRYPTO_CRYPTOSOFT_H_
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#define _CRYPTO_CRYPTOSOFT_H_
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/* Software session entry */
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struct swcr_data {
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int sw_alg; /* Algorithm */
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union {
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struct {
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u_int8_t *SW_ictx;
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u_int8_t *SW_octx;
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u_int16_t SW_klen;
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u_int16_t SW_mlen;
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struct auth_hash *SW_axf;
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} SWCR_AUTH;
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struct {
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u_int8_t *SW_kschedule;
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struct enc_xform *SW_exf;
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} SWCR_ENC;
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struct {
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u_int32_t SW_size;
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struct comp_algo *SW_cxf;
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} SWCR_COMP;
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} SWCR_UN;
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#define sw_ictx SWCR_UN.SWCR_AUTH.SW_ictx
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#define sw_octx SWCR_UN.SWCR_AUTH.SW_octx
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#define sw_klen SWCR_UN.SWCR_AUTH.SW_klen
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#define sw_mlen SWCR_UN.SWCR_AUTH.SW_mlen
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#define sw_axf SWCR_UN.SWCR_AUTH.SW_axf
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#define sw_kschedule SWCR_UN.SWCR_ENC.SW_kschedule
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#define sw_exf SWCR_UN.SWCR_ENC.SW_exf
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#define sw_size SWCR_UN.SWCR_COMP.SW_size
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#define sw_cxf SWCR_UN.SWCR_COMP.SW_cxf
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struct swcr_data *sw_next;
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};
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#ifdef _KERNEL
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extern u_int8_t *hmac_ipad_buffer;
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extern u_int8_t *hmac_opad_buffer;
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#endif /* _KERNEL */
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#endif /* _CRYPTO_CRYPTO_H_ */
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