775d9de30a
refer to commit 649dc2d985
(1) import hash method
(2) separate the update and finish processes
Signed-off-by: makejian <makejian@xiaomi.com>
1093 lines
27 KiB
C
1093 lines
27 KiB
C
/****************************************************************************
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* crypto/cryptosoft.c
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* $OpenBSD: cryptosoft.c,v 1.71 2014/07/13 23:24:47 deraadt Exp $
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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, 2001 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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <assert.h>
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#include <errno.h>
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#include <endian.h>
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#include <nuttx/kmalloc.h>
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#include <crypto/cryptodev.h>
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#include <crypto/cryptosoft.h>
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#include <crypto/xform.h>
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#include <sys/param.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef howmany
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# define howmany(x, y) (((x) + ((y) - 1)) / (y))
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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FAR struct swcr_data **swcr_sessions = NULL;
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uint32_t swcr_sesnum = 0;
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int swcr_id = -1;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/* Apply a symmetric encryption/decryption algorithm. */
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int swcr_encdec(FAR struct cryptop *crp, FAR struct cryptodesc *crd,
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FAR struct swcr_data *sw, caddr_t buf)
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{
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unsigned char blk[EALG_MAX_BLOCK_LEN];
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FAR unsigned char *iv;
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FAR unsigned char *ivp;
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FAR unsigned char *nivp;
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unsigned char iv2[EALG_MAX_BLOCK_LEN];
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FAR const struct enc_xform *exf;
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int i;
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int j;
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int blks;
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int ivlen;
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exf = sw->sw_exf;
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blks = exf->blocksize;
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ivlen = exf->ivsize;
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/* Check for non-padded data */
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if (crd->crd_len % blks)
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{
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return -EINVAL;
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}
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/* Initialize the IV */
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if (crd->crd_flags & CRD_F_ENCRYPT)
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{
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/* Do we need to write the IV */
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if (!(crd->crd_flags & CRD_F_IV_PRESENT))
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{
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arc4random_buf(crd->crd_iv, ivlen);
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bcopy(crd->crd_iv, buf + crd->crd_inject, ivlen);
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}
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}
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else
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{
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/* Decryption */
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/* IV explicitly provided ? */
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if (!(crd->crd_flags & CRD_F_IV_EXPLICIT))
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{
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/* Get IV off buf */
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bcopy(crd->crd_iv, buf + crd->crd_inject, ivlen);
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}
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}
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iv = crd->crd_iv;
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ivp = iv;
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/* xforms that provide a reinit method perform all IV
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* handling themselves.
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*/
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if (exf->reinit)
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{
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exf->reinit((caddr_t)sw->sw_kschedule, iv);
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}
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i = crd->crd_len;
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buf = buf + crd->crd_skip;
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while (i > 0)
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{
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bcopy(buf, blk, exf->blocksize);
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buf += exf->blocksize;
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if (exf->reinit)
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{
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if (crd->crd_flags & CRD_F_ENCRYPT)
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{
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exf->encrypt((caddr_t)sw->sw_kschedule,
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blk);
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}
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else
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{
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exf->decrypt((caddr_t)sw->sw_kschedule,
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blk);
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}
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}
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else if (crd->crd_flags & CRD_F_ENCRYPT)
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{
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/* XOR with previous block */
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for (j = 0; j < blks; j++)
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blk[j] ^= ivp[j];
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exf->encrypt((caddr_t)sw->sw_kschedule, blk);
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/* Keep encrypted block for XOR'ng
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* with next block
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*/
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bcopy(blk, iv, blks);
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ivp = iv;
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}
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else
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{
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/* decrypt */
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/* Keep encrypted block for XOR'ing
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* with next block
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*/
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nivp = (ivp == iv) ? iv2 : iv;
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bcopy(blk, nivp, blks);
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exf->decrypt((caddr_t)sw->sw_kschedule, blk);
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/* XOR with previous block */
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for (j = 0; j < blks; j++)
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{
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blk[j] ^= ivp[j];
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}
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ivp = nivp;
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}
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bcopy(blk, crp->crp_dst, exf->blocksize);
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crp->crp_dst += exf->blocksize;
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i -= blks;
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/* Could be done... */
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if (i == 0)
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{
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break;
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}
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}
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return 0; /* Done with encryption/decryption */
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}
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/* Compute keyed-hash authenticator. */
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int swcr_authcompute(FAR struct cryptop *crp,
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FAR struct cryptodesc *crd,
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FAR struct swcr_data *sw,
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caddr_t buf)
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{
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unsigned char aalg[AALG_MAX_RESULT_LEN];
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FAR const struct auth_hash *axf = sw->sw_axf;
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int err;
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if (sw->sw_ictx == 0)
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{
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return -EINVAL;
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}
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err = axf->update(&sw->sw_ctx, (FAR uint8_t *)buf + crd->crd_skip,
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crd->crd_len);
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if (err)
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{
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return err;
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}
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if (crd->crd_flags & CRD_F_ESN)
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{
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axf->update(&sw->sw_ctx, crd->crd_esn, 4);
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}
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switch (sw->sw_alg)
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{
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case CRYPTO_MD5_HMAC:
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case CRYPTO_SHA1_HMAC:
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case CRYPTO_RIPEMD160_HMAC:
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case CRYPTO_SHA2_256_HMAC:
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case CRYPTO_SHA2_384_HMAC:
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case CRYPTO_SHA2_512_HMAC:
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if (sw->sw_octx == NULL)
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{
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return -EINVAL;
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}
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if (crd->crd_flags & CRD_F_UPDATE)
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{
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break;
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}
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axf->final(aalg, &sw->sw_ctx);
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bcopy(sw->sw_octx, &sw->sw_ctx, axf->ctxsize);
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axf->update(&sw->sw_ctx, aalg, axf->hashsize);
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axf->final((FAR uint8_t *)crp->crp_mac, &sw->sw_ctx);
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bcopy(sw->sw_ictx, &sw->sw_ctx, axf->ctxsize);
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break;
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}
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return 0;
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}
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int swcr_hash(FAR struct cryptop *crp,
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FAR struct cryptodesc *crd,
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FAR struct swcr_data *sw,
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caddr_t buf)
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{
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FAR const struct auth_hash *axf = sw->sw_axf;
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if (crd->crd_flags & CRD_F_UPDATE)
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{
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return axf->update(&sw->sw_ctx, (FAR uint8_t *)buf + crd->crd_skip,
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crd->crd_len);
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}
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else
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{
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axf->final((FAR uint8_t *)crp->crp_mac, &sw->sw_ctx);
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}
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return 0;
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}
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/* Apply a combined encryption-authentication transformation */
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int swcr_authenc(FAR struct cryptop *crp)
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{
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uint32_t blkbuf[howmany(EALG_MAX_BLOCK_LEN, sizeof(uint32_t))];
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FAR u_char *blk = (u_char *)blkbuf;
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u_char aalg[AALG_MAX_RESULT_LEN];
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u_char iv[EALG_MAX_BLOCK_LEN];
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union authctx ctx;
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FAR struct cryptodesc *crd;
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FAR struct cryptodesc *crda = NULL;
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FAR struct cryptodesc *crde = NULL;
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FAR struct swcr_data *sw;
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FAR struct swcr_data *swa;
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FAR struct swcr_data *swe = NULL;
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FAR const struct auth_hash *axf = NULL;
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FAR const struct enc_xform *exf = NULL;
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caddr_t buf = (caddr_t)crp->crp_buf;
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FAR uint32_t *blkp;
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int blksz = 0;
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int ivlen = 0;
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int iskip = 0;
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int oskip = 0;
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int aadlen;
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int len;
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int i;
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for (crd = crp->crp_desc; crd; crd = crd->crd_next)
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{
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for (sw = swcr_sessions[crp->crp_sid & 0xffffffff];
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sw && sw->sw_alg != crd->crd_alg;
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sw = sw->sw_next);
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if (sw == NULL)
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{
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return -EINVAL;
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}
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switch (sw->sw_alg)
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{
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case CRYPTO_AES_GCM_16:
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case CRYPTO_AES_GMAC:
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case CRYPTO_CHACHA20_POLY1305:
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swe = sw;
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crde = crd;
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exf = swe->sw_exf;
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ivlen = exf->ivsize;
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break;
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case CRYPTO_AES_128_GMAC:
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case CRYPTO_AES_192_GMAC:
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case CRYPTO_AES_256_GMAC:
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case CRYPTO_CHACHA20_POLY1305_MAC:
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swa = sw;
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crda = crd;
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axf = swa->sw_axf;
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if (swa->sw_ictx == 0)
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{
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return -EINVAL;
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}
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bcopy(swa->sw_ictx, &ctx, axf->ctxsize);
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blksz = axf->blocksize;
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break;
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default:
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return -EINVAL;
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}
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}
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if (crde == NULL || crda == NULL)
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{
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return -EINVAL;
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}
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/* Initialize the IV */
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if (crde->crd_flags & CRD_F_ENCRYPT)
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{
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/* IV explicitly provided ? */
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if (crde->crd_flags & CRD_F_IV_EXPLICIT)
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{
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bcopy(crde->crd_iv, iv, ivlen);
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}
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else
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{
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arc4random_buf(iv, ivlen);
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}
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if (!((crde->crd_flags) & CRD_F_IV_PRESENT))
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{
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bcopy(iv, buf + crde->crd_inject, ivlen);
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}
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}
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else
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{
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/* Decryption */
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/* IV explicitly provided ? */
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if (crde->crd_flags & CRD_F_IV_EXPLICIT)
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{
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bcopy(crde->crd_iv, iv, ivlen);
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}
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else
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{
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/* Get IV off buf */
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bcopy(iv, buf + crde->crd_inject, ivlen);
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}
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}
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/* Supply MAC with IV */
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if (axf->reinit)
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{
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axf->reinit(&ctx, iv, ivlen);
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}
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/* Supply MAC with AAD */
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aadlen = crda->crd_len;
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/* Section 5 of RFC 4106 specifies that AAD construction consists of
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* {SPI, ESN, SN} whereas the real packet contains only {SPI, SN}.
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* Unfortunately it doesn't follow a good example set in the Section
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* 3.3.2.1 of RFC 4303 where upper part of the ESN, located in the
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* external (to the packet) memory buffer, is processed by the hash
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* function in the end thus allowing to retain simple programming
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* interfaces and avoid kludges like the one below.
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*/
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if (crda->crd_flags & CRD_F_ESN)
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{
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aadlen += 4;
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/* SPI */
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bcopy(buf + crda->crd_skip, blk, 4);
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iskip = 4; /* loop below will start with an offset of 4 */
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/* ESN */
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bcopy(crda->crd_esn, blk + 4, 4);
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oskip = iskip + 4; /* offset output buffer blk by 8 */
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}
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for (i = iskip; i < crda->crd_len; i += axf->hashsize)
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{
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len = MIN(crda->crd_len - i, axf->hashsize - oskip);
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bcopy(buf + crda->crd_skip + i, blk + oskip, len);
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bzero(blk + len + oskip, axf->hashsize - len - oskip);
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axf->update(&ctx, blk, axf->hashsize);
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oskip = 0; /* reset initial output offset */
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}
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if (exf->reinit)
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{
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exf->reinit((caddr_t)swe->sw_kschedule, iv);
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}
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/* Do encryption/decryption with MAC */
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for (i = 0; i < crde->crd_len; i += blksz)
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{
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len = MIN(crde->crd_len - i, blksz);
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if (len < blksz)
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{
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bzero(blk, blksz);
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}
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bcopy(buf + i, blk, len);
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if (crde->crd_flags & CRD_F_ENCRYPT)
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{
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exf->encrypt((caddr_t)swe->sw_kschedule, blk);
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axf->update(&ctx, blk, len);
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}
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else
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{
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axf->update(&ctx, blk, len);
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exf->decrypt((caddr_t)swe->sw_kschedule, blk);
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}
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bcopy(blk, crp->crp_dst + i, len);
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}
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/* Do any required special finalization */
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switch (crda->crd_alg)
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{
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case CRYPTO_AES_128_GMAC:
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case CRYPTO_AES_192_GMAC:
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case CRYPTO_AES_256_GMAC:
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/* length block */
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bzero(blk, axf->hashsize);
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blkp = (uint32_t *)blk + 1;
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*blkp = htobe32(aadlen * 8);
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blkp = (uint32_t *)blk + 3;
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*blkp = htobe32(crde->crd_len * 8);
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axf->update(&ctx, blk, axf->hashsize);
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break;
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case CRYPTO_CHACHA20_POLY1305_MAC:
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/* length block */
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bzero(blk, axf->hashsize);
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blkp = (uint32_t *)blk;
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*blkp = htole32(aadlen);
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blkp = (uint32_t *)blk + 2;
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*blkp = htole32(crde->crd_len);
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axf->update(&ctx, blk, axf->hashsize);
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break;
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}
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/* Finalize MAC */
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axf->final(aalg, &ctx);
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/* Inject the authentication data */
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bcopy(aalg, crp->crp_mac, axf->authsize);
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return 0;
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}
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/* Apply a compression/decompression algorithm */
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|
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int swcr_compdec(FAR struct cryptodesc *crd, FAR struct swcr_data *sw,
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caddr_t buf, int outtype)
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{
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FAR uint8_t *data;
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FAR uint8_t *out;
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FAR const struct comp_algo *cxf;
|
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uint32_t result;
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cxf = sw->sw_cxf;
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|
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/* We must handle the whole buffer of data in one time
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* then if there is not all the data in the mbuf, we must
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* copy in a buffer.
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*/
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data = kmm_malloc(crd->crd_len);
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if (data == NULL)
|
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{
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return -EINVAL;
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}
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|
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bcopy(buf + crd->crd_skip, data, crd->crd_len);
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if (crd->crd_flags & CRD_F_COMP)
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{
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result = cxf->compress(data, crd->crd_len, &out);
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}
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else
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{
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result = cxf->decompress(data, crd->crd_len, &out);
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}
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|
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kmm_free(data);
|
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if (result == 0)
|
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{
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return -EINVAL;
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}
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|
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sw->sw_size = result;
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|
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/* Check the compressed size when doing compression */
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|
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if (crd->crd_flags & CRD_F_COMP)
|
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{
|
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if (result > crd->crd_len)
|
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{
|
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/* Compression was useless, we lost time */
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|
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kmm_free(out);
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return 0;
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}
|
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}
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|
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bcopy(out, buf + crd->crd_skip, result);
|
|
kmm_free(out);
|
|
return 0;
|
|
}
|
|
|
|
/* Generate a new software session. */
|
|
|
|
int swcr_newsession(FAR uint32_t *sid, FAR struct cryptoini *cri)
|
|
{
|
|
FAR struct swcr_data **swd;
|
|
FAR const struct auth_hash *axf;
|
|
FAR const struct enc_xform *txf;
|
|
uint32_t i;
|
|
int k;
|
|
|
|
if (sid == NULL || cri == NULL)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (swcr_sessions)
|
|
{
|
|
for (i = 1; i < swcr_sesnum; i++)
|
|
{
|
|
if (swcr_sessions[i] == NULL)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (swcr_sessions == NULL || i == swcr_sesnum)
|
|
{
|
|
if (swcr_sessions == NULL)
|
|
{
|
|
i = 1; /* We leave swcr_sessions[0] empty */
|
|
swcr_sesnum = CRYPTO_SW_SESSIONS;
|
|
}
|
|
else
|
|
{
|
|
swcr_sesnum *= 2;
|
|
}
|
|
|
|
swd = kmm_calloc(swcr_sesnum, sizeof(struct swcr_data *));
|
|
if (swd == NULL)
|
|
{
|
|
/* Reset session number */
|
|
|
|
if (swcr_sesnum == CRYPTO_SW_SESSIONS)
|
|
{
|
|
swcr_sesnum = 0;
|
|
}
|
|
else
|
|
{
|
|
swcr_sesnum /= 2;
|
|
}
|
|
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
/* Copy existing sessions */
|
|
|
|
if (swcr_sessions)
|
|
{
|
|
bcopy(swcr_sessions, swd,
|
|
(swcr_sesnum / 2) * sizeof(struct swcr_data *));
|
|
kmm_free(swcr_sessions);
|
|
}
|
|
|
|
swcr_sessions = swd;
|
|
}
|
|
|
|
swd = &swcr_sessions[i];
|
|
*sid = i;
|
|
|
|
while (cri)
|
|
{
|
|
*swd = kmm_zalloc(sizeof(struct swcr_data));
|
|
if (*swd == NULL)
|
|
{
|
|
swcr_freesession(i);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
switch (cri->cri_alg)
|
|
{
|
|
case CRYPTO_3DES_CBC:
|
|
txf = &enc_xform_3des;
|
|
goto enccommon;
|
|
case CRYPTO_BLF_CBC:
|
|
txf = &enc_xform_blf;
|
|
goto enccommon;
|
|
case CRYPTO_CAST_CBC:
|
|
txf = &enc_xform_cast5;
|
|
goto enccommon;
|
|
case CRYPTO_AES_CBC:
|
|
txf = &enc_xform_aes;
|
|
goto enccommon;
|
|
case CRYPTO_AES_CTR:
|
|
txf = &enc_xform_aes_ctr;
|
|
goto enccommon;
|
|
case CRYPTO_AES_XTS:
|
|
txf = &enc_xform_aes_xts;
|
|
goto enccommon;
|
|
case CRYPTO_AES_GCM_16:
|
|
txf = &enc_xform_aes_gcm;
|
|
goto enccommon;
|
|
case CRYPTO_AES_GMAC:
|
|
txf = &enc_xform_aes_gmac;
|
|
(*swd)->sw_exf = txf;
|
|
break;
|
|
case CRYPTO_CHACHA20_POLY1305:
|
|
txf = &enc_xform_chacha20_poly1305;
|
|
goto enccommon;
|
|
case CRYPTO_NULL:
|
|
txf = &enc_xform_null;
|
|
goto enccommon;
|
|
enccommon:
|
|
if (txf->ctxsize > 0)
|
|
{
|
|
(*swd)->sw_kschedule = kmm_zalloc(txf->ctxsize);
|
|
if ((*swd)->sw_kschedule == NULL)
|
|
{
|
|
swcr_freesession(i);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (txf->setkey((*swd)->sw_kschedule,
|
|
(FAR uint8_t *)cri->cri_key,
|
|
cri->cri_klen / 8) < 0)
|
|
{
|
|
swcr_freesession(i);
|
|
return -EINVAL;
|
|
}
|
|
|
|
(*swd)->sw_exf = txf;
|
|
break;
|
|
|
|
case CRYPTO_MD5_HMAC:
|
|
axf = &auth_hash_hmac_md5_96;
|
|
goto authcommon;
|
|
case CRYPTO_SHA1_HMAC:
|
|
axf = &auth_hash_hmac_sha1_96;
|
|
goto authcommon;
|
|
case CRYPTO_RIPEMD160_HMAC:
|
|
axf = &auth_hash_hmac_ripemd_160_96;
|
|
goto authcommon;
|
|
case CRYPTO_SHA2_256_HMAC:
|
|
axf = &auth_hash_hmac_sha2_256_128;
|
|
goto authcommon;
|
|
case CRYPTO_SHA2_384_HMAC:
|
|
axf = &auth_hash_hmac_sha2_384_192;
|
|
goto authcommon;
|
|
case CRYPTO_SHA2_512_HMAC:
|
|
axf = &auth_hash_hmac_sha2_512_256;
|
|
authcommon:
|
|
(*swd)->sw_ictx = kmm_malloc(axf->ctxsize);
|
|
if ((*swd)->sw_ictx == NULL)
|
|
{
|
|
swcr_freesession(i);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
(*swd)->sw_octx = kmm_malloc(axf->ctxsize);
|
|
if ((*swd)->sw_octx == NULL)
|
|
{
|
|
swcr_freesession(i);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
for (k = 0; k < cri->cri_klen / 8; k++)
|
|
{
|
|
cri->cri_key[k] ^= HMAC_IPAD_VAL;
|
|
}
|
|
|
|
axf->init((*swd)->sw_ictx);
|
|
axf->update((*swd)->sw_ictx, (FAR uint8_t *)cri->cri_key,
|
|
cri->cri_klen / 8);
|
|
axf->update((*swd)->sw_ictx, hmac_ipad_buffer,
|
|
axf->blocksize - (cri->cri_klen / 8));
|
|
|
|
for (k = 0; k < cri->cri_klen / 8; k++)
|
|
{
|
|
cri->cri_key[k] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL);
|
|
}
|
|
|
|
axf->init((*swd)->sw_octx);
|
|
axf->update((*swd)->sw_octx, (FAR uint8_t *)cri->cri_key,
|
|
cri->cri_klen / 8);
|
|
axf->update((*swd)->sw_octx, hmac_opad_buffer,
|
|
axf->blocksize - (cri->cri_klen / 8));
|
|
|
|
for (k = 0; k < cri->cri_klen / 8; k++)
|
|
{
|
|
cri->cri_key[k] ^= HMAC_OPAD_VAL;
|
|
}
|
|
|
|
(*swd)->sw_axf = axf;
|
|
bcopy((*swd)->sw_ictx, &(*swd)->sw_ctx, axf->ctxsize);
|
|
break;
|
|
|
|
case CRYPTO_MD5:
|
|
axf = &auth_hash_md5;
|
|
goto auth3common;
|
|
case CRYPTO_SHA1:
|
|
axf = &auth_hash_sha1;
|
|
goto auth3common;
|
|
case CRYPTO_SHA2_256:
|
|
axf = &auth_hash_sha2_256;
|
|
goto auth3common;
|
|
case CRYPTO_SHA2_512:
|
|
axf = &auth_hash_sha2_512;
|
|
|
|
auth3common:
|
|
(*swd)->sw_ictx = kmm_zalloc(axf->ctxsize);
|
|
if ((*swd)->sw_ictx == NULL)
|
|
{
|
|
swcr_freesession(i);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
axf->init((*swd)->sw_ictx);
|
|
(*swd)->sw_axf = axf;
|
|
bcopy((*swd)->sw_ictx, &(*swd)->sw_ctx, axf->ctxsize);
|
|
break;
|
|
|
|
case CRYPTO_AES_128_GMAC:
|
|
axf = &auth_hash_gmac_aes_128;
|
|
goto auth4common;
|
|
|
|
case CRYPTO_AES_192_GMAC:
|
|
axf = &auth_hash_gmac_aes_192;
|
|
goto auth4common;
|
|
|
|
case CRYPTO_AES_256_GMAC:
|
|
axf = &auth_hash_gmac_aes_256;
|
|
goto auth4common;
|
|
|
|
case CRYPTO_CHACHA20_POLY1305_MAC:
|
|
axf = &auth_hash_chacha20_poly1305;
|
|
|
|
auth4common:
|
|
(*swd)->sw_ictx = kmm_malloc(axf->ctxsize);
|
|
if ((*swd)->sw_ictx == NULL)
|
|
{
|
|
swcr_freesession(i);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
axf->init((*swd)->sw_ictx);
|
|
axf->setkey((*swd)->sw_ictx, (FAR uint8_t *)cri->cri_key,
|
|
cri->cri_klen / 8);
|
|
(*swd)->sw_axf = axf;
|
|
break;
|
|
|
|
case CRYPTO_ESN:
|
|
|
|
/* nothing to do */
|
|
|
|
break;
|
|
default:
|
|
swcr_freesession(i);
|
|
return -EINVAL;
|
|
}
|
|
|
|
(*swd)->sw_alg = cri->cri_alg;
|
|
cri = cri->cri_next;
|
|
swd = &((*swd)->sw_next);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Free a session. */
|
|
|
|
int swcr_freesession(uint64_t tid)
|
|
{
|
|
FAR struct swcr_data *swd;
|
|
FAR const struct enc_xform *txf;
|
|
FAR const struct auth_hash *axf;
|
|
uint32_t sid = ((uint32_t) tid) & 0xffffffff;
|
|
|
|
if (sid > swcr_sesnum || swcr_sessions == NULL ||
|
|
swcr_sessions[sid] == NULL)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Silently accept and return */
|
|
|
|
if (sid == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
while ((swd = swcr_sessions[sid]) != NULL)
|
|
{
|
|
swcr_sessions[sid] = swd->sw_next;
|
|
|
|
switch (swd->sw_alg)
|
|
{
|
|
case CRYPTO_3DES_CBC:
|
|
case CRYPTO_BLF_CBC:
|
|
case CRYPTO_CAST_CBC:
|
|
case CRYPTO_RIJNDAEL128_CBC:
|
|
case CRYPTO_AES_CTR:
|
|
case CRYPTO_AES_XTS:
|
|
case CRYPTO_AES_GCM_16:
|
|
case CRYPTO_AES_GMAC:
|
|
case CRYPTO_CHACHA20_POLY1305:
|
|
case CRYPTO_NULL:
|
|
txf = swd->sw_exf;
|
|
|
|
if (swd->sw_kschedule)
|
|
{
|
|
explicit_bzero(swd->sw_kschedule, txf->ctxsize);
|
|
kmm_free(swd->sw_kschedule);
|
|
}
|
|
|
|
break;
|
|
|
|
case CRYPTO_MD5_HMAC:
|
|
case CRYPTO_SHA1_HMAC:
|
|
case CRYPTO_RIPEMD160_HMAC:
|
|
case CRYPTO_SHA2_256_HMAC:
|
|
case CRYPTO_SHA2_384_HMAC:
|
|
case CRYPTO_SHA2_512_HMAC:
|
|
axf = swd->sw_axf;
|
|
|
|
if (swd->sw_ictx)
|
|
{
|
|
explicit_bzero(swd->sw_ictx, axf->ctxsize);
|
|
kmm_free(swd->sw_ictx);
|
|
}
|
|
|
|
if (swd->sw_octx)
|
|
{
|
|
explicit_bzero(swd->sw_octx, axf->ctxsize);
|
|
kmm_free(swd->sw_octx);
|
|
}
|
|
|
|
break;
|
|
|
|
case CRYPTO_AES_128_GMAC:
|
|
case CRYPTO_AES_192_GMAC:
|
|
case CRYPTO_AES_256_GMAC:
|
|
case CRYPTO_CHACHA20_POLY1305_MAC:
|
|
case CRYPTO_MD5:
|
|
case CRYPTO_SHA1:
|
|
case CRYPTO_SHA2_256:
|
|
case CRYPTO_SHA2_512:
|
|
axf = swd->sw_axf;
|
|
|
|
if (swd->sw_ictx)
|
|
{
|
|
explicit_bzero(swd->sw_ictx, axf->ctxsize);
|
|
kmm_free(swd->sw_ictx);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
kmm_free(swd);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Process a software request. */
|
|
|
|
int swcr_process(struct cryptop *crp)
|
|
{
|
|
FAR struct cryptodesc *crd;
|
|
FAR struct swcr_data *sw;
|
|
uint32_t lid;
|
|
|
|
/* Sanity check */
|
|
|
|
if (crp == NULL)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (crp->crp_desc == NULL || crp->crp_buf == NULL)
|
|
{
|
|
crp->crp_etype = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
lid = crp->crp_sid & 0xffffffff;
|
|
if (lid >= swcr_sesnum || lid == 0 || swcr_sessions[lid] == NULL)
|
|
{
|
|
crp->crp_etype = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
/* Go through crypto descriptors, processing as we go */
|
|
|
|
for (crd = crp->crp_desc; crd; crd = crd->crd_next)
|
|
{
|
|
/* Find the crypto context.
|
|
* XXX Note that the logic here prevents us from having
|
|
* XXX the same algorithm multiple times in a session
|
|
* XXX (or rather, we can but it won't give us the right
|
|
* XXX results). To do that, we'd need some way of differentiating
|
|
* XXX between the various instances of an algorithm (so we can
|
|
* XXX locate the correct crypto context).
|
|
*/
|
|
|
|
for (sw = swcr_sessions[lid];
|
|
sw && sw->sw_alg != crd->crd_alg;
|
|
sw = sw->sw_next);
|
|
|
|
/* No such context ? */
|
|
|
|
if (sw == NULL)
|
|
{
|
|
crp->crp_etype = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
switch (sw->sw_alg)
|
|
{
|
|
case CRYPTO_NULL:
|
|
{
|
|
break;
|
|
}
|
|
|
|
case CRYPTO_3DES_CBC:
|
|
case CRYPTO_BLF_CBC:
|
|
case CRYPTO_CAST_CBC:
|
|
case CRYPTO_RIJNDAEL128_CBC:
|
|
case CRYPTO_AES_CTR:
|
|
case CRYPTO_AES_XTS:
|
|
if ((crp->crp_etype = swcr_encdec(crp, crd, sw,
|
|
crp->crp_buf)) != 0)
|
|
{
|
|
goto done;
|
|
}
|
|
|
|
break;
|
|
case CRYPTO_MD5_HMAC:
|
|
case CRYPTO_SHA1_HMAC:
|
|
case CRYPTO_RIPEMD160_HMAC:
|
|
case CRYPTO_SHA2_256_HMAC:
|
|
case CRYPTO_SHA2_384_HMAC:
|
|
case CRYPTO_SHA2_512_HMAC:
|
|
if ((crp->crp_etype = swcr_authcompute(crp, crd, sw,
|
|
crp->crp_buf)) != 0)
|
|
{
|
|
goto done;
|
|
}
|
|
|
|
break;
|
|
|
|
case CRYPTO_MD5:
|
|
case CRYPTO_SHA1:
|
|
case CRYPTO_SHA2_256:
|
|
case CRYPTO_SHA2_512:
|
|
if ((crp->crp_etype = swcr_hash(crp, crd, sw,
|
|
crp->crp_buf)) != 0)
|
|
{
|
|
goto done;
|
|
}
|
|
|
|
break;
|
|
|
|
case CRYPTO_AES_GCM_16:
|
|
case CRYPTO_AES_GMAC:
|
|
case CRYPTO_AES_128_GMAC:
|
|
case CRYPTO_AES_192_GMAC:
|
|
case CRYPTO_AES_256_GMAC:
|
|
case CRYPTO_CHACHA20_POLY1305:
|
|
case CRYPTO_CHACHA20_POLY1305_MAC:
|
|
crp->crp_etype = swcr_authenc(crp);
|
|
goto done;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Unknown/unsupported algorithm */
|
|
|
|
crp->crp_etype = -EINVAL;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
done:
|
|
return 0;
|
|
}
|
|
|
|
/* Initialize the driver, called from the kernel main(). */
|
|
|
|
void swcr_init(void)
|
|
{
|
|
int algs[CRYPTO_ALGORITHM_MAX + 1];
|
|
int flags = CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_ENCRYPT_MAC |
|
|
CRYPTOCAP_F_MAC_ENCRYPT;
|
|
|
|
swcr_id = crypto_get_driverid(flags);
|
|
if (swcr_id < 0)
|
|
{
|
|
/* This should never happen */
|
|
|
|
PANIC();
|
|
}
|
|
|
|
algs[CRYPTO_3DES_CBC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_BLF_CBC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_CAST_CBC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_MD5_HMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_SHA1_HMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_RIPEMD160_HMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_RIJNDAEL128_CBC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_AES_CTR] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_AES_XTS] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_AES_GCM_16] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_AES_GMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_NULL] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_SHA2_256_HMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_SHA2_384_HMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_SHA2_512_HMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_AES_128_GMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_AES_192_GMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_AES_256_GMAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_CHACHA20_POLY1305] = CRYPTO_ALG_FLAG_SUPPORTED;
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algs[CRYPTO_CHACHA20_POLY1305_MAC] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_MD5] = CRYPTO_ALG_FLAG_SUPPORTED;
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|
algs[CRYPTO_SHA1] = CRYPTO_ALG_FLAG_SUPPORTED;
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|
algs[CRYPTO_SHA2_256] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
algs[CRYPTO_SHA2_512] = CRYPTO_ALG_FLAG_SUPPORTED;
|
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algs[CRYPTO_ESN] = CRYPTO_ALG_FLAG_SUPPORTED;
|
|
|
|
crypto_register(swcr_id, algs, swcr_newsession,
|
|
swcr_freesession, swcr_process);
|
|
}
|