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SUNRPC: Remove unused make_checksum

Browse Source 
Commit ec596aaf9b ("SUNRPC: Remove code behind
CONFIG_RPCSEC_GSS_KRB5_SIMPLIFIED") was the last user of the
make_checksum() function.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Dr. David Alan Gilbert 2025-02-03 02:07:43 +00:00 committed by Chuck Lever
parent 6e45906a0b
commit 4e59e6972b
2 changed files with 0 additions and 94 deletions
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90
net/sunrpc/auth_gss/gss_krb5_crypto.c
View File

@ -148,96 +148,6 @@ checksummer(struct scatterlist *sg, void *data)
return crypto_ahash_update(req);
}
/*
* checksum the plaintext data and hdrlen bytes of the token header
* The checksum is performed over the first 8 bytes of the
* gss token header and then over the data body
*/
u32
make_checksum(struct krb5_ctx *kctx, char *header, int hdrlen,
struct xdr_buf *body, int body_offset, u8 *cksumkey,
unsigned int usage, struct xdr_netobj *cksumout)
{
struct crypto_ahash *tfm;
struct ahash_request *req;
struct scatterlist sg[1];
int err = -1;
u8 *checksumdata;
unsigned int checksumlen;
if (cksumout->len < kctx->gk5e->cksumlength) {
dprintk("%s: checksum buffer length, %u, too small for %s\n",
__func__, cksumout->len, kctx->gk5e->name);
return GSS_S_FAILURE;
}
checksumdata = kmalloc(GSS_KRB5_MAX_CKSUM_LEN, GFP_KERNEL);
if (checksumdata == NULL)
return GSS_S_FAILURE;
tfm = crypto_alloc_ahash(kctx->gk5e->cksum_name, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm))
goto out_free_cksum;
req = ahash_request_alloc(tfm, GFP_KERNEL);
if (!req)
goto out_free_ahash;
ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL);
checksumlen = crypto_ahash_digestsize(tfm);
if (cksumkey != NULL) {
err = crypto_ahash_setkey(tfm, cksumkey,
kctx->gk5e->keylength);
if (err)
goto out;
}
err = crypto_ahash_init(req);
if (err)
goto out;
sg_init_one(sg, header, hdrlen);
ahash_request_set_crypt(req, sg, NULL, hdrlen);
err = crypto_ahash_update(req);
if (err)
goto out;
err = xdr_process_buf(body, body_offset, body->len - body_offset,
checksummer, req);
if (err)
goto out;
ahash_request_set_crypt(req, NULL, checksumdata, 0);
err = crypto_ahash_final(req);
if (err)
goto out;
switch (kctx->gk5e->ctype) {
case CKSUMTYPE_RSA_MD5:
err = krb5_encrypt(kctx->seq, NULL, checksumdata,
checksumdata, checksumlen);
if (err)
goto out;
memcpy(cksumout->data,
checksumdata + checksumlen - kctx->gk5e->cksumlength,
kctx->gk5e->cksumlength);
break;
case CKSUMTYPE_HMAC_SHA1_DES3:
memcpy(cksumout->data, checksumdata, kctx->gk5e->cksumlength);
break;
default:
BUG();
break;
}
cksumout->len = kctx->gk5e->cksumlength;
out:
ahash_request_free(req);
out_free_ahash:
crypto_free_ahash(tfm);
out_free_cksum:
kfree(checksumdata);
return err ? GSS_S_FAILURE : 0;
}
/**
* gss_krb5_checksum - Compute the MAC for a GSS Wrap or MIC token
* @tfm: an initialized hash transform

4
net/sunrpc/auth_gss/gss_krb5_internal.h
View File

@ -155,10 +155,6 @@ static inline int krb5_derive_key(struct krb5_ctx *kctx,
void krb5_make_confounder(u8 *p, int conflen);
u32 make_checksum(struct krb5_ctx *kctx, char *header, int hdrlen,
struct xdr_buf *body, int body_offset, u8 *cksumkey,
unsigned int usage, struct xdr_netobj *cksumout);
u32 gss_krb5_checksum(struct crypto_ahash *tfm, char *header, int hdrlen,
const struct xdr_buf *body, int body_offset,
struct xdr_netobj *cksumout);