aboutsummaryrefslogtreecommitdiff
path: root/fs/cifs/asn1.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/cifs/asn1.c')
-rw-r--r--fs/cifs/asn1.c147
1 files changed, 64 insertions, 83 deletions
diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index 1b09f167006..a3b56544c21 100644
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -49,6 +49,7 @@
#define ASN1_OJI 6 /* Object Identifier */
#define ASN1_OJD 7 /* Object Description */
#define ASN1_EXT 8 /* External */
+#define ASN1_ENUM 10 /* Enumerated */
#define ASN1_SEQ 16 /* Sequence */
#define ASN1_SET 17 /* Set */
#define ASN1_NUMSTR 18 /* Numerical String */
@@ -78,10 +79,12 @@
#define SPNEGO_OID_LEN 7
#define NTLMSSP_OID_LEN 10
#define KRB5_OID_LEN 7
+#define KRB5U2U_OID_LEN 8
#define MSKRB5_OID_LEN 7
static unsigned long SPNEGO_OID[7] = { 1, 3, 6, 1, 5, 5, 2 };
static unsigned long NTLMSSP_OID[10] = { 1, 3, 6, 1, 4, 1, 311, 2, 2, 10 };
static unsigned long KRB5_OID[7] = { 1, 2, 840, 113554, 1, 2, 2 };
+static unsigned long KRB5U2U_OID[8] = { 1, 2, 840, 113554, 1, 2, 2, 3 };
static unsigned long MSKRB5_OID[7] = { 1, 2, 840, 48018, 1, 2, 2 };
/*
@@ -122,6 +125,28 @@ asn1_octet_decode(struct asn1_ctx *ctx, unsigned char *ch)
return 1;
}
+#if 0 /* will be needed later by spnego decoding/encoding of ntlmssp */
+static unsigned char
+asn1_enum_decode(struct asn1_ctx *ctx, __le32 *val)
+{
+ unsigned char ch;
+
+ if (ctx->pointer >= ctx->end) {
+ ctx->error = ASN1_ERR_DEC_EMPTY;
+ return 0;
+ }
+
+ ch = *(ctx->pointer)++; /* ch has 0xa, ptr points to length octet */
+ if ((ch) == ASN1_ENUM) /* if ch value is ENUM, 0xa */
+ *val = *(++(ctx->pointer)); /* value has enum value */
+ else
+ return 0;
+
+ ctx->pointer++;
+ return 1;
+}
+#endif
+
static unsigned char
asn1_tag_decode(struct asn1_ctx *ctx, unsigned int *tag)
{
@@ -467,18 +492,13 @@ compare_oid(unsigned long *oid1, unsigned int oid1len,
int
decode_negTokenInit(unsigned char *security_blob, int length,
- enum securityEnum *secType)
+ struct TCP_Server_Info *server)
{
struct asn1_ctx ctx;
unsigned char *end;
unsigned char *sequence_end;
unsigned long *oid = NULL;
unsigned int cls, con, tag, oidlen, rc;
- bool use_ntlmssp = false;
- bool use_kerberos = false;
- bool use_mskerberos = false;
-
- *secType = NTLM; /* BB eventually make Kerberos or NLTMSSP the default*/
/* cifs_dump_mem(" Received SecBlob ", security_blob, length); */
@@ -486,11 +506,11 @@ decode_negTokenInit(unsigned char *security_blob, int length,
/* GSSAPI header */
if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding negTokenInit header"));
+ cifs_dbg(FYI, "Error decoding negTokenInit header\n");
return 0;
} else if ((cls != ASN1_APL) || (con != ASN1_CON)
|| (tag != ASN1_EOC)) {
- cFYI(1, ("cls = %d con = %d tag = %d", cls, con, tag));
+ cifs_dbg(FYI, "cls = %d con = %d tag = %d\n", cls, con, tag);
return 0;
}
@@ -511,132 +531,93 @@ decode_negTokenInit(unsigned char *security_blob, int length,
/* SPNEGO OID not present or garbled -- bail out */
if (!rc) {
- cFYI(1, ("Error decoding negTokenInit header"));
+ cifs_dbg(FYI, "Error decoding negTokenInit header\n");
return 0;
}
+ /* SPNEGO */
if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding negTokenInit"));
+ cifs_dbg(FYI, "Error decoding negTokenInit\n");
return 0;
} else if ((cls != ASN1_CTX) || (con != ASN1_CON)
|| (tag != ASN1_EOC)) {
- cFYI(1,
- ("cls = %d con = %d tag = %d end = %p (%d) exit 0",
- cls, con, tag, end, *end));
+ cifs_dbg(FYI, "cls = %d con = %d tag = %d end = %p (%d) exit 0\n",
+ cls, con, tag, end, *end);
return 0;
}
+ /* negTokenInit */
if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding negTokenInit"));
+ cifs_dbg(FYI, "Error decoding negTokenInit\n");
return 0;
} else if ((cls != ASN1_UNI) || (con != ASN1_CON)
|| (tag != ASN1_SEQ)) {
- cFYI(1,
- ("cls = %d con = %d tag = %d end = %p (%d) exit 1",
- cls, con, tag, end, *end));
+ cifs_dbg(FYI, "cls = %d con = %d tag = %d end = %p (%d) exit 1\n",
+ cls, con, tag, end, *end);
return 0;
}
+ /* sequence */
if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding 2nd part of negTokenInit"));
+ cifs_dbg(FYI, "Error decoding 2nd part of negTokenInit\n");
return 0;
} else if ((cls != ASN1_CTX) || (con != ASN1_CON)
|| (tag != ASN1_EOC)) {
- cFYI(1,
- ("cls = %d con = %d tag = %d end = %p (%d) exit 0",
- cls, con, tag, end, *end));
+ cifs_dbg(FYI, "cls = %d con = %d tag = %d end = %p (%d) exit 0\n",
+ cls, con, tag, end, *end);
return 0;
}
+ /* sequence of */
if (asn1_header_decode
(&ctx, &sequence_end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding 2nd part of negTokenInit"));
+ cifs_dbg(FYI, "Error decoding 2nd part of negTokenInit\n");
return 0;
} else if ((cls != ASN1_UNI) || (con != ASN1_CON)
|| (tag != ASN1_SEQ)) {
- cFYI(1,
- ("cls = %d con = %d tag = %d end = %p (%d) exit 1",
- cls, con, tag, end, *end));
+ cifs_dbg(FYI, "cls = %d con = %d tag = %d end = %p (%d) exit 1\n",
+ cls, con, tag, end, *end);
return 0;
}
+ /* list of security mechanisms */
while (!asn1_eoc_decode(&ctx, sequence_end)) {
rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag);
if (!rc) {
- cFYI(1,
- ("Error decoding negTokenInit hdr exit2"));
+ cifs_dbg(FYI, "Error decoding negTokenInit hdr exit2\n");
return 0;
}
if ((tag == ASN1_OJI) && (con == ASN1_PRI)) {
if (asn1_oid_decode(&ctx, end, &oid, &oidlen)) {
- cFYI(1, ("OID len = %d oid = 0x%lx 0x%lx "
- "0x%lx 0x%lx", oidlen, *oid,
- *(oid + 1), *(oid + 2), *(oid + 3)));
+ cifs_dbg(FYI, "OID len = %d oid = 0x%lx 0x%lx 0x%lx 0x%lx\n",
+ oidlen, *oid, *(oid + 1), *(oid + 2),
+ *(oid + 3));
if (compare_oid(oid, oidlen, MSKRB5_OID,
- MSKRB5_OID_LEN) &&
- !use_kerberos)
- use_mskerberos = true;
+ MSKRB5_OID_LEN))
+ server->sec_mskerberos = true;
+ else if (compare_oid(oid, oidlen, KRB5U2U_OID,
+ KRB5U2U_OID_LEN))
+ server->sec_kerberosu2u = true;
else if (compare_oid(oid, oidlen, KRB5_OID,
- KRB5_OID_LEN) &&
- !use_mskerberos)
- use_kerberos = true;
+ KRB5_OID_LEN))
+ server->sec_kerberos = true;
else if (compare_oid(oid, oidlen, NTLMSSP_OID,
NTLMSSP_OID_LEN))
- use_ntlmssp = true;
+ server->sec_ntlmssp = true;
kfree(oid);
}
} else {
- cFYI(1, ("Should be an oid what is going on?"));
+ cifs_dbg(FYI, "Should be an oid what is going on?\n");
}
}
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding last part negTokenInit exit3"));
- return 0;
- } else if ((cls != ASN1_CTX) || (con != ASN1_CON)) {
- /* tag = 3 indicating mechListMIC */
- cFYI(1, ("Exit 4 cls = %d con = %d tag = %d end = %p (%d)",
- cls, con, tag, end, *end));
- return 0;
- }
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding last part negTokenInit exit5"));
- return 0;
- } else if ((cls != ASN1_UNI) || (con != ASN1_CON)
- || (tag != ASN1_SEQ)) {
- cFYI(1, ("cls = %d con = %d tag = %d end = %p (%d)",
- cls, con, tag, end, *end));
- }
-
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding last part negTokenInit exit 7"));
- return 0;
- } else if ((cls != ASN1_CTX) || (con != ASN1_CON)) {
- cFYI(1, ("Exit 8 cls = %d con = %d tag = %d end = %p (%d)",
- cls, con, tag, end, *end));
- return 0;
- }
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cFYI(1, ("Error decoding last part negTokenInit exit9"));
- return 0;
- } else if ((cls != ASN1_UNI) || (con != ASN1_PRI)
- || (tag != ASN1_GENSTR)) {
- cFYI(1, ("Exit10 cls = %d con = %d tag = %d end = %p (%d)",
- cls, con, tag, end, *end));
- return 0;
- }
- cFYI(1, ("Need to call asn1_octets_decode() function for %s",
- ctx.pointer)); /* is this UTF-8 or ASCII? */
-
- if (use_kerberos)
- *secType = Kerberos;
- else if (use_mskerberos)
- *secType = MSKerberos;
- else if (use_ntlmssp)
- *secType = NTLMSSP;
-
+ /*
+ * We currently ignore anything at the end of the SPNEGO blob after
+ * the mechTypes have been parsed, since none of that info is
+ * used at the moment.
+ */
return 1;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:44:07 +0000