Attachment 4553 Details for Bug 6624 – an implementation.

[patch] an implementation.

0002-Support-ASN.1-BIT-STRING-and-use-it-in-SPNEGO.patch (text/plain), 6.11 KB, created by Kouhei Sutou on 2009-08-13 01:07:21 UTC

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Creator: Kouhei Sutou

Created: 2009-08-13 01:07:21 UTC

Size: 6.11 KB

patch

obsolete

>From 0e0c31c7acc71637006b655f9937ac63faeda554 Mon Sep 17 00:00:00 2001
>From: Kouhei Sutou <kou@clear-code.com>
>Date: Thu, 13 Aug 2009 15:05:21 +0900
>Subject: [PATCH 2/2] Support ASN.1 BIT STRING and use it in SPNEGO.
>
>---
> lib/util/asn1.c                    |   42 ++++++++++++++++++++++++++++++++++++
> lib/util/asn1.h                    |    2 +
> source4/auth/gensec/spnego.c       |    6 +++-
> source4/auth/gensec/spnego.h       |    4 +-
> source4/auth/gensec/spnego_parse.c |   12 +++++-----
> 5 files changed, 56 insertions(+), 10 deletions(-)
>
>diff --git a/lib/util/asn1.c b/lib/util/asn1.c
>index 317ee13..70c2c57 100644
>--- a/lib/util/asn1.c
>+++ b/lib/util/asn1.c
>@@ -205,6 +205,15 @@ bool asn1_write_Integer(struct asn1_data *data, int i)
> 	return asn1_pop_tag(data);
> }
> 
>+/* write a BIT STRING */
>+bool asn1_write_BitString(struct asn1_data *data, const void *p, size_t length, uint8_t padding)
>+{
>+	if (!asn1_push_tag(data, ASN1_BIT_STRING)) return false;
>+	if (!asn1_write_uint8(data, padding)) return false;
>+	if (!asn1_write(data, p, length)) return false;
>+	return asn1_pop_tag(data);
>+}
>+
> bool ber_write_OID_String(DATA_BLOB *blob, const char *OID)
> {
> 	uint_t v, v2;
>@@ -727,6 +736,39 @@ bool asn1_read_Integer(struct asn1_data *data, int *i)
> 	return asn1_end_tag(data);	
> }
> 
>+/* read a BIT STRING */
>+bool asn1_read_BitString(struct asn1_data *data, TALLOC_CTX *mem_ctx, DATA_BLOB *blob, uint8_t *padding)
>+{
>+	int len;
>+	ZERO_STRUCTP(blob);
>+	if (!asn1_start_tag(data, ASN1_BIT_STRING)) return false;
>+	len = asn1_tag_remaining(data);
>+	if (len < 0) {
>+		data->has_error = true;
>+		return false;
>+	}
>+	if (!asn1_read_uint8(data, padding)) return false;
>+
>+	*blob = data_blob_talloc(mem_ctx, NULL, len);
>+	if (!blob->data) {
>+		data->has_error = true;
>+		return false;
>+	}
>+	if (asn1_read(data, blob->data, len - 1)) {
>+		blob->length--;
>+		blob->data[len] = 0;
>+		asn1_end_tag(data);
>+	}
>+
>+	if (data->has_error) {
>+		data_blob_free(blob);
>+		*blob = data_blob_null;
>+		*padding = 0;
>+		return false;
>+	}
>+	return true;
>+}
>+
> /* read an integer */
> bool asn1_read_enumerated(struct asn1_data *data, int *v)
> {
>diff --git a/lib/util/asn1.h b/lib/util/asn1.h
>index 4c66240..9abae50 100644
>--- a/lib/util/asn1.h
>+++ b/lib/util/asn1.h
>@@ -60,6 +60,7 @@ bool asn1_push_tag(struct asn1_data *data, uint8_t tag);
> bool asn1_pop_tag(struct asn1_data *data);
> bool asn1_write_implicit_Integer(struct asn1_data *data, int i);
> bool asn1_write_Integer(struct asn1_data *data, int i);
>+bool asn1_write_BitString(struct asn1_data *data, const void *p, size_t length, uint8_t padding);
> bool ber_write_OID_String(DATA_BLOB *blob, const char *OID);
> bool asn1_write_OID(struct asn1_data *data, const char *OID);
> bool asn1_write_OctetString(struct asn1_data *data, const void *p, size_t length);
>@@ -90,6 +91,7 @@ bool asn1_read_OctetString(struct asn1_data *data, TALLOC_CTX *mem_ctx, DATA_BLO
> bool asn1_read_ContextSimple(struct asn1_data *data, uint8_t num, DATA_BLOB *blob);
> bool asn1_read_implicit_Integer(struct asn1_data *data, int *i);
> bool asn1_read_Integer(struct asn1_data *data, int *i);
>+bool asn1_read_BitString(struct asn1_data *data, TALLOC_CTX *mem_ctx, DATA_BLOB *blob, uint8_t *padding);
> bool asn1_read_enumerated(struct asn1_data *data, int *v);
> bool asn1_check_enumerated(struct asn1_data *data, int v);
> bool asn1_write_enumerated(struct asn1_data *data, uint8_t v);
>diff --git a/source4/auth/gensec/spnego.c b/source4/auth/gensec/spnego.c
>index b356720..867f234 100644
>--- a/source4/auth/gensec/spnego.c
>+++ b/source4/auth/gensec/spnego.c
>@@ -628,7 +628,8 @@ static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec
> 
> 		/* List the remaining mechs as options */
> 		spnego_out.negTokenInit.mechTypes = send_mech_types;
>-		spnego_out.negTokenInit.reqFlags = 0;
>+		spnego_out.negTokenInit.reqFlags = null_data_blob;
>+		spnego_out.negTokenInit.reqFlagsPadding = 0;
> 		
> 		if (spnego_state->state_position == SPNEGO_SERVER_START) {
> 			/* server credentials */
>@@ -844,7 +845,8 @@ static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TA
> 		/* compose reply */
> 		spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
> 		spnego_out.negTokenInit.mechTypes = my_mechs;
>-		spnego_out.negTokenInit.reqFlags = 0;
>+		spnego_out.negTokenInit.reqFlags = null_data_blob;
>+		spnego_out.negTokenInit.reqFlagsPadding = 0;
> 		spnego_out.negTokenInit.mechListMIC = null_data_blob;
> 		spnego_out.negTokenInit.mechToken = unwrapped_out;
> 		
>diff --git a/source4/auth/gensec/spnego.h b/source4/auth/gensec/spnego.h
>index 24e80ec..9bf31a5 100644
>--- a/source4/auth/gensec/spnego.h
>+++ b/source4/auth/gensec/spnego.h
>@@ -27,7 +27,6 @@
> #define SPNEGO_ANON_FLAG     0x10
> #define SPNEGO_CONF_FLAG     0x20
> #define SPNEGO_INTEG_FLAG    0x40
>-#define SPNEGO_REQ_FLAG      0x80
> 
> enum spnego_negResult {
> 	SPNEGO_ACCEPT_COMPLETED = 0,
>@@ -38,7 +37,8 @@ enum spnego_negResult {
> 
> struct spnego_negTokenInit {
> 	const char **mechTypes;
>-	int reqFlags;
>+	DATA_BLOB reqFlags;
>+	uint8_t reqFlagsPadding;
> 	DATA_BLOB mechToken;
> 	DATA_BLOB mechListMIC;
> 	char *targetPrincipal;
>diff --git a/source4/auth/gensec/spnego_parse.c b/source4/auth/gensec/spnego_parse.c
>index a79f15b..0d872b2 100644
>--- a/source4/auth/gensec/spnego_parse.c
>+++ b/source4/auth/gensec/spnego_parse.c
>@@ -63,8 +63,8 @@ static bool read_negTokenInit(struct asn1_data *asn1, TALLOC_CTX *mem_ctx,
> 		/* Read reqFlags */
> 		case ASN1_CONTEXT(1):
> 			asn1_start_tag(asn1, ASN1_CONTEXT(1));
>-			asn1_read_Integer(asn1, &token->reqFlags);
>-			token->reqFlags |= SPNEGO_REQ_FLAG;
>+			asn1_read_BitString(asn1, mem_ctx, &token->reqFlags,
>+					    &token->reqFlagsPadding);
> 			asn1_end_tag(asn1);
> 			break;
>                 /* Read mechToken */
>@@ -131,11 +131,11 @@ static bool write_negTokenInit(struct asn1_data *asn1, struct spnego_negTokenIni
> 	}
> 
> 	/* write reqFlags */
>-	if (token->reqFlags & SPNEGO_REQ_FLAG) {
>-		int flags = token->reqFlags & ~SPNEGO_REQ_FLAG;
>-
>+	if (token->reqFlags.length > 0) {
> 		asn1_push_tag(asn1, ASN1_CONTEXT(1));
>-		asn1_write_Integer(asn1, flags);
>+		asn1_write_BitString(asn1, token->reqFlags.data,
>+				     token->reqFlags.length,
>+				     token->reqFlagsPadding);
> 		asn1_pop_tag(asn1);
> 	}
> 
>-- 
>1.6.3.3
>

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