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gss_krb5: split up functions in preparation of adding new enctypes

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Add encryption type to the krb5 context structure and use it to switch
to the correct functions depending on the encryption type.

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 13:02:49 -04:00 committed by Trond Myklebust
parent 54ec3d462f
commit 1ac3719a22
5 changed files with 69 additions and 12 deletions
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1
include/linux/sunrpc/gss_krb5.h
View File

@ -48,6 +48,7 @@
struct krb5_ctx {
int initiate; /* 1 = initiating, 0 = accepting */
u32 enctype;
struct crypto_blkcipher *enc;
struct crypto_blkcipher *seq;
s32 endtime;

1
net/sunrpc/auth_gss/gss_krb5_mech.c
View File

@ -139,6 +139,7 @@ gss_import_sec_context_kerberos(const void *p,
p = simple_get_bytes(p, end, &ctx->initiate, sizeof(ctx->initiate));
if (IS_ERR(p))
goto out_err_free_ctx;
ctx->enctype = ENCTYPE_DES_CBC_RAW;
/* The downcall format was designed before we completely understood
* the uses of the context fields; so it includes some stuff we
* just give some minimal sanity-checking, and some we ignore

20
net/sunrpc/auth_gss/gss_krb5_seal.c
View File

@ -70,11 +70,10 @@
DEFINE_SPINLOCK(krb5_seq_lock);
u32
gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text,
static u32
gss_get_mic_v1(struct krb5_ctx *ctx, struct xdr_buf *text,
struct xdr_netobj *token)
{
struct krb5_ctx *ctx = gss_ctx->internal_ctx_id;
char cksumdata[16];
struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata};
unsigned char *ptr, *msg_start;
@ -120,3 +119,18 @@ gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text,
return (ctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE;
}
u32
gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text,
struct xdr_netobj *token)
{
struct krb5_ctx *ctx = gss_ctx->internal_ctx_id;
switch (ctx->enctype) {
default:
BUG();
case ENCTYPE_DES_CBC_RAW:
return gss_get_mic_v1(ctx, text, token);
}
}

21
net/sunrpc/auth_gss/gss_krb5_unseal.c
View File

@ -70,11 +70,10 @@
/* read_token is a mic token, and message_buffer is the data that the mic was
* supposedly taken over. */
u32
gss_verify_mic_kerberos(struct gss_ctx *gss_ctx,
static u32
gss_verify_mic_v1(struct krb5_ctx *ctx,
struct xdr_buf *message_buffer, struct xdr_netobj *read_token)
{
struct krb5_ctx *ctx = gss_ctx->internal_ctx_id;
int signalg;
int sealalg;
char cksumdata[16];
@ -135,3 +134,19 @@ gss_verify_mic_kerberos(struct gss_ctx *gss_ctx,
return GSS_S_COMPLETE;
}
u32
gss_verify_mic_kerberos(struct gss_ctx *gss_ctx,
struct xdr_buf *message_buffer,
struct xdr_netobj *read_token)
{
struct krb5_ctx *ctx = gss_ctx->internal_ctx_id;
switch (ctx->enctype) {
default:
BUG();
case ENCTYPE_DES_CBC_RAW:
return gss_verify_mic_v1(ctx, message_buffer, read_token);
}
}

38
net/sunrpc/auth_gss/gss_krb5_wrap.c
View File

@ -124,11 +124,10 @@ make_confounder(char *p, u32 conflen)
/* XXX factor out common code with seal/unseal. */
u32
gss_wrap_kerberos(struct gss_ctx *ctx, int offset,
static u32
gss_wrap_kerberos_v1(struct krb5_ctx *kctx, int offset,
struct xdr_buf *buf, struct page **pages)
{
struct krb5_ctx *kctx = ctx->internal_ctx_id;
char cksumdata[16];
struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata};
int blocksize = 0, plainlen;
@ -203,10 +202,9 @@ gss_wrap_kerberos(struct gss_ctx *ctx, int offset,
return (kctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE;
}
u32
gss_unwrap_kerberos(struct gss_ctx *ctx, int offset, struct xdr_buf *buf)
static u32
gss_unwrap_kerberos_v1(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf)
{
struct krb5_ctx *kctx = ctx->internal_ctx_id;
int signalg;
int sealalg;
char cksumdata[16];
@ -294,3 +292,31 @@ gss_unwrap_kerberos(struct gss_ctx *ctx, int offset, struct xdr_buf *buf)
return GSS_S_COMPLETE;
}
u32
gss_wrap_kerberos(struct gss_ctx *gctx, int offset,
struct xdr_buf *buf, struct page **pages)
{
struct krb5_ctx *kctx = gctx->internal_ctx_id;
switch (kctx->enctype) {
default:
BUG();
case ENCTYPE_DES_CBC_RAW:
return gss_wrap_kerberos_v1(kctx, offset, buf, pages);
}
}
u32
gss_unwrap_kerberos(struct gss_ctx *gctx, int offset, struct xdr_buf *buf)
{
struct krb5_ctx *kctx = gctx->internal_ctx_id;
switch (kctx->enctype) {
default:
BUG();
case ENCTYPE_DES_CBC_RAW:
return gss_unwrap_kerberos_v1(kctx, offset, buf);
}
}