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gss_krb5: Save the raw session key in the context 

This is needed for deriving arcfour-hmac keys "on the fly"
using the sequence number or checksu

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 13:03:03 -04:00 committed by Trond Myklebust
parent 8b23707612
commit fc263a917a
2 changed files with 14 additions and 14 deletions
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1
include/linux/sunrpc/gss_krb5.h
View File

@ -101,6 +101,7 @@ struct krb5_ctx {
struct crypto_blkcipher *initiator_enc;
struct crypto_blkcipher *acceptor_enc_aux;
struct crypto_blkcipher *initiator_enc_aux;
u8 Ksess[GSS_KRB5_MAX_KEYLEN]; /* session key */
u8 cksum[GSS_KRB5_MAX_KEYLEN];
s32 endtime;
u32 seq_send;

27
net/sunrpc/auth_gss/gss_krb5_mech.c
View File

@ -344,7 +344,7 @@ set_cdata(u8 cdata[GSS_KRB5_K5CLENGTH], u32 usage, u8 seed)
}
static int
context_derive_keys_des3(struct krb5_ctx *ctx, u8 *rawkey, u32 keylen)
context_derive_keys_des3(struct krb5_ctx *ctx)
{
struct xdr_netobj c, keyin, keyout;
u8 cdata[GSS_KRB5_K5CLENGTH];
@ -353,18 +353,18 @@ context_derive_keys_des3(struct krb5_ctx *ctx, u8 *rawkey, u32 keylen)
c.len = GSS_KRB5_K5CLENGTH;
c.data = cdata;
keyin.data = rawkey;
keyin.len = keylen;
keyout.len = keylen;
keyin.data = ctx->Ksess;
keyin.len = ctx->gk5e->keylength;
keyout.len = ctx->gk5e->keylength;
/* seq uses the raw key */
ctx->seq = context_v2_alloc_cipher(ctx, ctx->gk5e->encrypt_name,
rawkey);
ctx->Ksess);
if (ctx->seq == NULL)
goto out_err;
ctx->enc = context_v2_alloc_cipher(ctx, ctx->gk5e->encrypt_name,
rawkey);
ctx->Ksess);
if (ctx->enc == NULL)
goto out_free_seq;
@ -389,7 +389,7 @@ context_derive_keys_des3(struct krb5_ctx *ctx, u8 *rawkey, u32 keylen)
}
static int
context_derive_keys_new(struct krb5_ctx *ctx, u8 *rawkey, u32 keylen)
context_derive_keys_new(struct krb5_ctx *ctx)
{
struct xdr_netobj c, keyin, keyout;
u8 cdata[GSS_KRB5_K5CLENGTH];
@ -398,9 +398,9 @@ context_derive_keys_new(struct krb5_ctx *ctx, u8 *rawkey, u32 keylen)
c.len = GSS_KRB5_K5CLENGTH;
c.data = cdata;
keyin.data = rawkey;
keyin.len = keylen;
keyout.len = keylen;
keyin.data = ctx->Ksess;
keyin.len = ctx->gk5e->keylength;
keyout.len = ctx->gk5e->keylength;
/* initiator seal encryption */
set_cdata(cdata, KG_USAGE_INITIATOR_SEAL, KEY_USAGE_SEED_ENCRYPTION);
@ -502,7 +502,6 @@ context_derive_keys_new(struct krb5_ctx *ctx, u8 *rawkey, u32 keylen)
static int
gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx)
{
u8 rawkey[GSS_KRB5_MAX_KEYLEN];
int keylen;
p = simple_get_bytes(p, end, &ctx->flags, sizeof(ctx->flags));
@ -538,7 +537,7 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx)
}
keylen = ctx->gk5e->keylength;
p = simple_get_bytes(p, end, rawkey, keylen);
p = simple_get_bytes(p, end, ctx->Ksess, keylen);
if (IS_ERR(p))
goto out_err;
@ -557,10 +556,10 @@ gss_import_v2_context(const void *p, const void *end, struct krb5_ctx *ctx)
switch (ctx->enctype) {
case ENCTYPE_DES3_CBC_RAW:
return context_derive_keys_des3(ctx, rawkey, keylen);
return context_derive_keys_des3(ctx);
case ENCTYPE_AES128_CTS_HMAC_SHA1_96:
case ENCTYPE_AES256_CTS_HMAC_SHA1_96:
return context_derive_keys_new(ctx, rawkey, keylen);
return context_derive_keys_new(ctx);
default:
return -EINVAL;
}