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sys/opencrypto/cryptosoft.c

/* $OpenBSD: cryptosoft.c,v 1.35 2002/04/26 08:43:50 deraadt Exp $ */ /* $OpenBSD: cryptosoft.c,v 1.35 2002/04/26 08:43:50 deraadt Exp $ */
/*- /*-
* The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
* Copyright (c) 2002-2006 Sam Leffler, Errno Consulting * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
* *
* This code was written by Angelos D. Keromytis in Athens, Greece, in * This code was written by Angelos D. Keromytis in Athens, Greece, in
* February 2000. Network Security Technologies Inc. (NSTI) kindly * February 2000. Network Security Technologies Inc. (NSTI) kindly
* supported the development of this code. * supported the development of this code.
* *
* Copyright (c) 2000, 2001 Angelos D. Keromytis * Copyright (c) 2000, 2001 Angelos D. Keromytis
* Copyright (c) 2014 The FreeBSD Foundation * Copyright (c) 2014-2021 The FreeBSD Foundation
* All rights reserved. * All rights reserved.
* *
* Portions of this software were developed by John-Mark Gurney * Portions of this software were developed by John-Mark Gurney
* under sponsorship of the FreeBSD Foundation and * under sponsorship of the FreeBSD Foundation and
* Rubicon Communications, LLC (Netgate). * Rubicon Communications, LLC (Netgate).
* *
* Portions of this software were developed by Ararat River
* Consulting, LLC under sponsorship of the FreeBSD Foundation.
*
* Permission to use, copy, and modify this software with or without fee * Permission to use, copy, and modify this software with or without fee
* is hereby granted, provided that this entire notice is included in * is hereby granted, provided that this entire notice is included in
* all source code copies of any software which is or includes a copy or * all source code copies of any software which is or includes a copy or
* modification of this software. * modification of this software.
* *
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
▲ Show 20 Lines • Show All 74 Lines • ▼ Show 20 Lines
swcr_encdec(struct swcr_session *ses, struct cryptop *crp) swcr_encdec(struct swcr_session *ses, struct cryptop *crp)
{ {
unsigned char iv[EALG_MAX_BLOCK_LEN], blk[EALG_MAX_BLOCK_LEN]; unsigned char iv[EALG_MAX_BLOCK_LEN], blk[EALG_MAX_BLOCK_LEN];
unsigned char *ivp, *nivp, iv2[EALG_MAX_BLOCK_LEN]; unsigned char *ivp, *nivp, iv2[EALG_MAX_BLOCK_LEN];
const struct crypto_session_params *csp; const struct crypto_session_params *csp;
const struct enc_xform *exf; const struct enc_xform *exf;
struct swcr_encdec *sw; struct swcr_encdec *sw;
size_t inlen, outlen; size_t inlen, outlen;
int i, blks, ivlen, resid; int i, blks, resid;
struct crypto_buffer_cursor cc_in, cc_out; struct crypto_buffer_cursor cc_in, cc_out;
const unsigned char *inblk; const unsigned char *inblk;
unsigned char *outblk; unsigned char *outblk;
int error; int error;
bool encrypting; bool encrypting;
error = 0; error = 0;
sw = &ses->swcr_encdec; sw = &ses->swcr_encdec;
exf = sw->sw_exf; exf = sw->sw_exf;
ivlen = exf->ivsize; csp = crypto_get_params(crp->crp_session);
if (exf->native_blocksize == 0) { if (exf->native_blocksize == 0) {
/* Check for non-padded data */ /* Check for non-padded data */
if ((crp->crp_payload_length % exf->blocksize) != 0) if ((crp->crp_payload_length % exf->blocksize) != 0)
return (EINVAL); return (EINVAL);
blks = exf->blocksize; blks = exf->blocksize;
} else } else
blks = exf->native_blocksize; blks = exf->native_blocksize;
if (exf == &enc_xform_aes_icm && if (exf == &enc_xform_aes_icm &&
(crp->crp_flags & CRYPTO_F_IV_SEPARATE) == 0) (crp->crp_flags & CRYPTO_F_IV_SEPARATE) == 0)
return (EINVAL); return (EINVAL);
if (crp->crp_cipher_key != NULL) { if (crp->crp_cipher_key != NULL) {
csp = crypto_get_params(crp->crp_session);
error = exf->setkey(sw->sw_kschedule, error = exf->setkey(sw->sw_kschedule,
crp->crp_cipher_key, csp->csp_cipher_klen); crp->crp_cipher_key, csp->csp_cipher_klen);
if (error) if (error)
return (error); return (error);
} }
crypto_read_iv(crp, iv); crypto_read_iv(crp, iv);
if (exf->reinit) { if (exf->reinit) {
/* /*
* xforms that provide a reinit method perform all IV * xforms that provide a reinit method perform all IV
* handling themselves. * handling themselves.
*/ */
exf->reinit(sw->sw_kschedule, iv); exf->reinit(sw->sw_kschedule, iv, csp->csp_ivlen);
} }
ivp = iv; ivp = iv;
crypto_cursor_init(&cc_in, &crp->crp_buf); crypto_cursor_init(&cc_in, &crp->crp_buf);
crypto_cursor_advance(&cc_in, crp->crp_payload_start); crypto_cursor_advance(&cc_in, crp->crp_payload_start);
inblk = crypto_cursor_segment(&cc_in, &inlen); inblk = crypto_cursor_segment(&cc_in, &inlen);
if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) { if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) {
▲ Show 20 Lines • Show All 370 Lines • ▼ Show 20 Lines if (resid > 0) {
crypto_cursor_copydata(&cc_in, resid, blk); crypto_cursor_copydata(&cc_in, resid, blk);
axf->Update(&ctx, blk, blksz); axf->Update(&ctx, blk, blksz);
} }
} }
if (crp->crp_cipher_key != NULL) if (crp->crp_cipher_key != NULL)
exf->setkey(swe->sw_kschedule, crp->crp_cipher_key, exf->setkey(swe->sw_kschedule, crp->crp_cipher_key,
crypto_get_params(crp->crp_session)->csp_cipher_klen); crypto_get_params(crp->crp_session)->csp_cipher_klen);
exf->reinit(swe->sw_kschedule, iv); exf->reinit(swe->sw_kschedule, iv, ivlen);
/* Do encryption with MAC */ /* Do encryption with MAC */
crypto_cursor_init(&cc_in, &crp->crp_buf); crypto_cursor_init(&cc_in, &crp->crp_buf);
crypto_cursor_advance(&cc_in, crp->crp_payload_start); crypto_cursor_advance(&cc_in, crp->crp_payload_start);
if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) { if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) {
crypto_cursor_init(&cc_out, &crp->crp_obuf); crypto_cursor_init(&cc_out, &crp->crp_obuf);
crypto_cursor_advance(&cc_out, crp->crp_payload_output_start); crypto_cursor_advance(&cc_out, crp->crp_payload_output_start);
} else } else
▲ Show 20 Lines • Show All 202 Lines • ▼ Show 20 Lines else
error = crypto_apply(crp, crp->crp_aad_start, error = crypto_apply(crp, crp->crp_aad_start,
crp->crp_aad_length, axf->Update, &ctx); crp->crp_aad_length, axf->Update, &ctx);
if (error) if (error)
return (error); return (error);
if (crp->crp_cipher_key != NULL) if (crp->crp_cipher_key != NULL)
exf->setkey(swe->sw_kschedule, crp->crp_cipher_key, exf->setkey(swe->sw_kschedule, crp->crp_cipher_key,
crypto_get_params(crp->crp_session)->csp_cipher_klen); crypto_get_params(crp->crp_session)->csp_cipher_klen);
exf->reinit(swe->sw_kschedule, iv); exf->reinit(swe->sw_kschedule, iv, ivlen);
/* Do encryption/decryption with MAC */ /* Do encryption/decryption with MAC */
crypto_cursor_init(&cc_in, &crp->crp_buf); crypto_cursor_init(&cc_in, &crp->crp_buf);
crypto_cursor_advance(&cc_in, crp->crp_payload_start); crypto_cursor_advance(&cc_in, crp->crp_payload_start);
if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) { if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) {
crypto_cursor_init(&cc_out, &crp->crp_obuf); crypto_cursor_init(&cc_out, &crp->crp_obuf);
crypto_cursor_advance(&cc_out, crp->crp_payload_output_start); crypto_cursor_advance(&cc_out, crp->crp_payload_output_start);
} else } else
▲ Show 20 Lines • Show All 54 Lines • ▼ Show 20 Lines if (!CRYPTO_OP_IS_ENCRYPT(crp->crp_op)) {
r = timingsafe_bcmp(tag, tag2, swa->sw_mlen); r = timingsafe_bcmp(tag, tag2, swa->sw_mlen);
explicit_bzero(tag2, sizeof(tag2)); explicit_bzero(tag2, sizeof(tag2));
if (r != 0) { if (r != 0) {
error = EBADMSG; error = EBADMSG;
goto out; goto out;
} }
/* tag matches, decrypt data */ /* tag matches, decrypt data */
exf->reinit(swe->sw_kschedule, iv); exf->reinit(swe->sw_kschedule, iv, ivlen);
crypto_cursor_init(&cc_in, &crp->crp_buf); crypto_cursor_init(&cc_in, &crp->crp_buf);
crypto_cursor_advance(&cc_in, crp->crp_payload_start); crypto_cursor_advance(&cc_in, crp->crp_payload_start);
for (resid = crp->crp_payload_length; resid > blksz; for (resid = crp->crp_payload_length; resid > blksz;
resid -= blksz) { resid -= blksz) {
inblk = crypto_cursor_segment(&cc_in, &len); inblk = crypto_cursor_segment(&cc_in, &len);
if (len < blksz) { if (len < blksz) {
crypto_cursor_copydata(&cc_in, blksz, blk); crypto_cursor_copydata(&cc_in, blksz, blk);
inblk = blk; inblk = blk;
▲ Show 20 Lines • Show All 74 Lines • ▼ Show 20 Lines if (crp->crp_aad_length % 16 != 0) {
/* padding1 */ /* padding1 */
memset(blk, 0, 16); memset(blk, 0, 16);
axf->Update(&ctx, blk, 16 - crp->crp_aad_length % 16); axf->Update(&ctx, blk, 16 - crp->crp_aad_length % 16);
} }
if (crp->crp_cipher_key != NULL) if (crp->crp_cipher_key != NULL)
exf->setkey(swe->sw_kschedule, crp->crp_cipher_key, exf->setkey(swe->sw_kschedule, crp->crp_cipher_key,
csp->csp_cipher_klen); csp->csp_cipher_klen);
exf->reinit(swe->sw_kschedule, crp->crp_iv); exf->reinit(swe->sw_kschedule, crp->crp_iv, csp->csp_ivlen);
/* Do encryption with MAC */ /* Do encryption with MAC */
crypto_cursor_init(&cc_in, &crp->crp_buf); crypto_cursor_init(&cc_in, &crp->crp_buf);
crypto_cursor_advance(&cc_in, crp->crp_payload_start); crypto_cursor_advance(&cc_in, crp->crp_payload_start);
if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) { if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) {
crypto_cursor_init(&cc_out, &crp->crp_obuf); crypto_cursor_init(&cc_out, &crp->crp_obuf);
crypto_cursor_advance(&cc_out, crp->crp_payload_output_start); crypto_cursor_advance(&cc_out, crp->crp_payload_output_start);
} else } else
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