diff options
author | Kevin Coffman <kwc@citi.umich.edu> | 2010-03-17 13:02:59 -0400 |
---|---|---|
committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-05-14 15:09:18 -0400 |
commit | de9c17eb4a912c9028f7b470eb80815144883b26 (patch) | |
tree | 3e681897cff2db43f91c1e5e2f7dcad9598165c9 /net/sunrpc/auth_gss/gss_krb5_seal.c | |
parent | c43abaedaff92a7bcbfe04b593164bb5faba3078 (diff) |
gss_krb5: add support for new token formats in rfc4121
This is a step toward support for AES encryption types which are
required to use the new token formats defined in rfc4121.
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
[SteveD: Fixed a typo in gss_verify_mic_v2()]
Signed-off-by: Steve Dickson <steved@redhat.com>
[Trond: Got rid of the TEST_ROTATE/TEST_EXTRA_COUNT crap]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/auth_gss/gss_krb5_seal.c')
-rw-r--r-- | net/sunrpc/auth_gss/gss_krb5_seal.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c index 7ede900049a7..477a546d19bb 100644 --- a/net/sunrpc/auth_gss/gss_krb5_seal.c +++ b/net/sunrpc/auth_gss/gss_krb5_seal.c @@ -91,6 +91,33 @@ setup_token(struct krb5_ctx *ctx, struct xdr_netobj *token) return (char *)krb5_hdr; } +static void * +setup_token_v2(struct krb5_ctx *ctx, struct xdr_netobj *token) +{ + __be16 *ptr, *krb5_hdr; + u8 *p, flags = 0x00; + + if ((ctx->flags & KRB5_CTX_FLAG_INITIATOR) == 0) + flags |= 0x01; + if (ctx->flags & KRB5_CTX_FLAG_ACCEPTOR_SUBKEY) + flags |= 0x04; + + /* Per rfc 4121, sec 4.2.6.1, there is no header, + * just start the token */ + krb5_hdr = ptr = (__be16 *)token->data; + + *ptr++ = KG2_TOK_MIC; + p = (u8 *)ptr; + *p++ = flags; + *p++ = 0xff; + ptr = (__be16 *)p; + *ptr++ = 0xffff; + *ptr++ = 0xffff; + + token->len = GSS_KRB5_TOK_HDR_LEN + ctx->gk5e->cksumlength; + return krb5_hdr; +} + static u32 gss_get_mic_v1(struct krb5_ctx *ctx, struct xdr_buf *text, struct xdr_netobj *token) @@ -133,6 +160,45 @@ gss_get_mic_v1(struct krb5_ctx *ctx, struct xdr_buf *text, } u32 +gss_get_mic_v2(struct krb5_ctx *ctx, struct xdr_buf *text, + struct xdr_netobj *token) +{ + char cksumdata[GSS_KRB5_MAX_CKSUM_LEN]; + struct xdr_netobj cksumobj = { .len = sizeof(cksumdata), + .data = cksumdata}; + void *krb5_hdr; + s32 now; + u64 seq_send; + u8 *cksumkey; + + dprintk("RPC: %s\n", __func__); + + krb5_hdr = setup_token_v2(ctx, token); + + /* Set up the sequence number. Now 64-bits in clear + * text and w/o direction indicator */ + spin_lock(&krb5_seq_lock); + seq_send = ctx->seq_send64++; + spin_unlock(&krb5_seq_lock); + *((u64 *)(krb5_hdr + 8)) = cpu_to_be64(seq_send); + + if (ctx->initiate) + cksumkey = ctx->initiator_sign; + else + cksumkey = ctx->acceptor_sign; + + if (make_checksum_v2(ctx, krb5_hdr, GSS_KRB5_TOK_HDR_LEN, + text, 0, cksumkey, &cksumobj)) + return GSS_S_FAILURE; + + memcpy(krb5_hdr + GSS_KRB5_TOK_HDR_LEN, cksumobj.data, cksumobj.len); + + now = get_seconds(); + + 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) { @@ -144,6 +210,9 @@ gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text, case ENCTYPE_DES_CBC_RAW: case ENCTYPE_DES3_CBC_RAW: return gss_get_mic_v1(ctx, text, token); + case ENCTYPE_AES128_CTS_HMAC_SHA1_96: + case ENCTYPE_AES256_CTS_HMAC_SHA1_96: + return gss_get_mic_v2(ctx, text, token); } } |