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gss_krb5: introduce encryption type framework

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Add enctype framework and change functions to use the generic
values from it rather than the values hard-coded for des.

Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Kevin Coffman
2010-03-17 13:02:51 -04:00
committed by Trond Myklebust
parent a8cc1cb7d7
commit 81d4a4333a
6 changed files with 206 additions and 70 deletions
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49
net/sunrpc/auth_gss/gss_krb5_seal.c
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@ -3,7 +3,7 @@
*
* Adapted from MIT Kerberos 5-1.2.1 lib/gssapi/krb5/k5seal.c
*
* Copyright (c) 2000 The Regents of the University of Michigan.
* Copyright (c) 2000-2008 The Regents of the University of Michigan.
* All rights reserved.
*
* Andy Adamson <andros@umich.edu>
@ -70,36 +70,47 @@
DEFINE_SPINLOCK(krb5_seq_lock);
static char *
setup_token(struct krb5_ctx *ctx, struct xdr_netobj *token)
{
__be16 *ptr, *krb5_hdr;
int body_size = GSS_KRB5_TOK_HDR_LEN + ctx->gk5e->cksumlength;
token->len = g_token_size(&ctx->mech_used, body_size);
ptr = (__be16 *)token->data;
g_make_token_header(&ctx->mech_used, body_size, (unsigned char **)&ptr);
/* ptr now at start of header described in rfc 1964, section 1.2.1: */
krb5_hdr = ptr;
*ptr++ = KG_TOK_MIC_MSG;
*ptr++ = cpu_to_le16(ctx->gk5e->signalg);
*ptr++ = SEAL_ALG_NONE;
*ptr++ = 0xffff;
return (char *)krb5_hdr;
}
static u32
gss_get_mic_v1(struct krb5_ctx *ctx, struct xdr_buf *text,
struct xdr_netobj *token)
{
char cksumdata[16];
struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata};
unsigned char *ptr, *msg_start;
char cksumdata[GSS_KRB5_MAX_CKSUM_LEN];
struct xdr_netobj md5cksum = {.len = sizeof(cksumdata),
.data = cksumdata};
void *ptr;
s32 now;
u32 seq_send;
dprintk("RPC: gss_krb5_seal\n");
dprintk("RPC: %s\n", __func__);
BUG_ON(ctx == NULL);
now = get_seconds();
token->len = g_token_size(&ctx->mech_used, GSS_KRB5_TOK_HDR_LEN + 8);
ptr = setup_token(ctx, token);
ptr = token->data;
g_make_token_header(&ctx->mech_used, GSS_KRB5_TOK_HDR_LEN + 8, &ptr);
/* ptr now at header described in rfc 1964, section 1.2.1: */
ptr[0] = (unsigned char) ((KG_TOK_MIC_MSG >> 8) & 0xff);
ptr[1] = (unsigned char) (KG_TOK_MIC_MSG & 0xff);
msg_start = ptr + GSS_KRB5_TOK_HDR_LEN + 8;
*(__be16 *)(ptr + 2) = htons(SGN_ALG_DES_MAC_MD5);
memset(ptr + 4, 0xff, 4);
if (make_checksum("md5", ptr, 8, text, 0, &md5cksum))
if (make_checksum((char *)ctx->gk5e->cksum_name, ptr, 8,
text, 0, &md5cksum))
return GSS_S_FAILURE;
if (krb5_encrypt(ctx->seq, NULL, md5cksum.data,