/* generate a krb5 GSS-API wrapper packet given a ticket */ DATA_BLOB spnego_gen_krb5_wrap(DATA_BLOB ticket, const uint8 tok_id[2]) { ASN1_DATA data; DATA_BLOB ret; memset(&data, 0, sizeof(data)); asn1_push_tag(&data, ASN1_APPLICATION(0)); asn1_write_OID(&data, OID_KERBEROS5); asn1_write(&data, tok_id, 2); asn1_write(&data, ticket.data, ticket.length); asn1_pop_tag(&data); if (data.has_error) { DEBUG(1,("Failed to build krb5 wrapper at offset %d\n", (int)data.ofs)); asn1_free(&data); } ret = data_blob(data.data, data.length); asn1_free(&data); return ret; }
DATA_BLOB spnego_gen_negTokenInit(TALLOC_CTX *ctx, const char *OIDs[], DATA_BLOB *psecblob, const char *principal) { int i; ASN1_DATA *data; DATA_BLOB ret; data = asn1_init(talloc_tos()); if (data == NULL) { return data_blob_null; } asn1_push_tag(data,ASN1_APPLICATION(0)); asn1_write_OID(data,OID_SPNEGO); asn1_push_tag(data,ASN1_CONTEXT(0)); asn1_push_tag(data,ASN1_SEQUENCE(0)); asn1_push_tag(data,ASN1_CONTEXT(0)); asn1_push_tag(data,ASN1_SEQUENCE(0)); for (i=0; OIDs[i]; i++) { asn1_write_OID(data,OIDs[i]); } asn1_pop_tag(data); asn1_pop_tag(data); if (psecblob && psecblob->length && psecblob->data) { asn1_push_tag(data, ASN1_CONTEXT(2)); asn1_write_OctetString(data,psecblob->data, psecblob->length); asn1_pop_tag(data); } if (principal) { asn1_push_tag(data, ASN1_CONTEXT(3)); asn1_push_tag(data, ASN1_SEQUENCE(0)); asn1_push_tag(data, ASN1_CONTEXT(0)); asn1_write_GeneralString(data,principal); asn1_pop_tag(data); asn1_pop_tag(data); asn1_pop_tag(data); } asn1_pop_tag(data); asn1_pop_tag(data); asn1_pop_tag(data); if (data->has_error) { DEBUG(1,("Failed to build negTokenInit at offset %d\n", (int)data->ofs)); } ret = data_blob_talloc(ctx, data->data, data->length); asn1_free(data); return ret; }
/* generate a krb5 GSS-API wrapper packet given a ticket */ DATA_BLOB spnego_gen_krb5_wrap(TALLOC_CTX *ctx, const DATA_BLOB ticket, const uint8_t tok_id[2]) { ASN1_DATA *data; DATA_BLOB ret = data_blob_null; data = asn1_init(talloc_tos()); if (data == NULL) { return data_blob_null; } if (!asn1_push_tag(data, ASN1_APPLICATION(0))) goto err; if (!asn1_write_OID(data, OID_KERBEROS5)) goto err; if (!asn1_write(data, tok_id, 2)) goto err; if (!asn1_write(data, ticket.data, ticket.length)) goto err; if (!asn1_pop_tag(data)) goto err; if (!asn1_extract_blob(data, ctx, &ret)) { goto err; } err: if (asn1_has_error(data)) { DEBUG(1, ("Failed to build krb5 wrapper at offset %d\n", (int)asn1_current_ofs(data))); } asn1_free(data); return ret; }
ssize_t write_spnego_data(DATA_BLOB *blob, SPNEGO_DATA *spnego) { ASN1_DATA asn1; ssize_t ret = -1; ZERO_STRUCT(asn1); switch (spnego->type) { case SPNEGO_NEG_TOKEN_INIT: asn1_push_tag(&asn1, ASN1_APPLICATION(0)); asn1_write_OID(&asn1, OID_SPNEGO); write_negTokenInit(&asn1, &spnego->negTokenInit); asn1_pop_tag(&asn1); break; case SPNEGO_NEG_TOKEN_TARG: write_negTokenTarg(&asn1, &spnego->negTokenTarg); break; default: asn1.has_error = True; break; } if (!asn1.has_error) { *blob = data_blob(asn1.data, asn1.length); ret = asn1.ofs; } asn1_free(&asn1); return ret; }
bool spnego_write_mech_types(TALLOC_CTX *mem_ctx, const char **mech_types, DATA_BLOB *blob) { struct asn1_data *asn1 = asn1_init(mem_ctx); /* Write mechTypes */ if (mech_types && *mech_types) { int i; asn1_push_tag(asn1, ASN1_SEQUENCE(0)); for (i = 0; mech_types[i]; i++) { asn1_write_OID(asn1, mech_types[i]); } asn1_pop_tag(asn1); } if (asn1->has_error) { asn1_free(asn1); return false; } *blob = data_blob_talloc(mem_ctx, asn1->data, asn1->length); if (blob->length != asn1->length) { asn1_free(asn1); return false; } asn1_free(asn1); return true; }
/* generate a krb5 GSS-API wrapper packet given a ticket */ DATA_BLOB spnego_gen_krb5_wrap(TALLOC_CTX *ctx, const DATA_BLOB ticket, const uint8 tok_id[2]) { ASN1_DATA *data; DATA_BLOB ret; data = asn1_init(talloc_tos()); if (data == NULL) { return data_blob_null; } asn1_push_tag(data, ASN1_APPLICATION(0)); asn1_write_OID(data, OID_KERBEROS5); asn1_write(data, tok_id, 2); asn1_write(data, ticket.data, ticket.length); asn1_pop_tag(data); if (data->has_error) { DEBUG(1,("Failed to build krb5 wrapper at offset %d\n", (int)data->ofs)); } ret = data_blob_talloc(ctx, data->data, data->length); asn1_free(data); return ret; }
ssize_t spnego_write_data(TALLOC_CTX *mem_ctx, DATA_BLOB *blob, struct spnego_data *spnego) { struct asn1_data *asn1 = asn1_init(mem_ctx); ssize_t ret = -1; if (asn1 == NULL) { return -1; } switch (spnego->type) { case SPNEGO_NEG_TOKEN_INIT: asn1_push_tag(asn1, ASN1_APPLICATION(0)); asn1_write_OID(asn1, GENSEC_OID_SPNEGO); write_negTokenInit(asn1, &spnego->negTokenInit); asn1_pop_tag(asn1); break; case SPNEGO_NEG_TOKEN_TARG: write_negTokenTarg(asn1, &spnego->negTokenTarg); break; default: asn1->has_error = true; break; } if (!asn1->has_error) { *blob = data_blob_talloc(mem_ctx, asn1->data, asn1->length); ret = asn1->ofs; } asn1_free(asn1); return ret; }
static bool write_negTokenTarg(ASN1_DATA *asn1, negTokenTarg_t *token) { asn1_push_tag(asn1, ASN1_CONTEXT(1)); asn1_push_tag(asn1, ASN1_SEQUENCE(0)); asn1_push_tag(asn1, ASN1_CONTEXT(0)); asn1_write_enumerated(asn1, token->negResult); asn1_pop_tag(asn1); if (token->supportedMech) { asn1_push_tag(asn1, ASN1_CONTEXT(1)); asn1_write_OID(asn1, token->supportedMech); asn1_pop_tag(asn1); } if (token->responseToken.data) { asn1_push_tag(asn1, ASN1_CONTEXT(2)); asn1_write_OctetString(asn1, token->responseToken.data, token->responseToken.length); asn1_pop_tag(asn1); } if (token->mechListMIC.data) { asn1_push_tag(asn1, ASN1_CONTEXT(3)); asn1_write_OctetString(asn1, token->mechListMIC.data, token->mechListMIC.length); asn1_pop_tag(asn1); } asn1_pop_tag(asn1); asn1_pop_tag(asn1); return !asn1->has_error; }
/* generate a krb5 GSS-API wrapper packet given a ticket */ static DATA_BLOB gensec_gssapi_gen_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *ticket, const uint8_t tok_id[2]) { struct asn1_data *data; DATA_BLOB ret; data = asn1_init(mem_ctx); if (!data || !ticket->data) { return data_blob(NULL,0); } asn1_push_tag(data, ASN1_APPLICATION(0)); asn1_write_OID(data, GENSEC_OID_KERBEROS5); asn1_write(data, tok_id, 2); asn1_write(data, ticket->data, ticket->length); asn1_pop_tag(data); if (data->has_error) { DEBUG(1,("Failed to build krb5 wrapper at offset %d\n", (int)data->ofs)); asn1_free(data); return data_blob(NULL,0); } ret = data_blob_talloc(mem_ctx, data->data, data->length); asn1_free(data); return ret; }
/* generate a negTokenInit packet given a GUID, a list of supported OIDs (the mechanisms) and a principal name string */ DATA_BLOB spnego_gen_negTokenInit(uint8 guid[16], const char *OIDs[], const char *principal) { int i; ASN1_DATA data; DATA_BLOB ret; memset(&data, 0, sizeof(data)); asn1_write(&data, guid, 16); asn1_push_tag(&data,ASN1_APPLICATION(0)); asn1_write_OID(&data,OID_SPNEGO); asn1_push_tag(&data,ASN1_CONTEXT(0)); asn1_push_tag(&data,ASN1_SEQUENCE(0)); asn1_push_tag(&data,ASN1_CONTEXT(0)); asn1_push_tag(&data,ASN1_SEQUENCE(0)); for (i=0; OIDs[i]; i++) { asn1_write_OID(&data,OIDs[i]); } asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_push_tag(&data, ASN1_CONTEXT(3)); asn1_push_tag(&data, ASN1_SEQUENCE(0)); asn1_push_tag(&data, ASN1_CONTEXT(0)); asn1_write_GeneralString(&data,principal); asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_pop_tag(&data); if (data.has_error) { DEBUG(1,("Failed to build negTokenInit at offset %d\n", (int)data.ofs)); asn1_free(&data); } ret = data_blob(data.data, data.length); asn1_free(&data); return ret; }
/* generate a minimal SPNEGO response packet. Doesn't contain much. */ DATA_BLOB spnego_gen_auth_response_and_mic(TALLOC_CTX *ctx, NTSTATUS nt_status, const char *mechOID, DATA_BLOB *reply, DATA_BLOB *mechlistMIC) { ASN1_DATA *data; DATA_BLOB ret; uint8 negResult; if (NT_STATUS_IS_OK(nt_status)) { negResult = SPNEGO_ACCEPT_COMPLETED; } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { negResult = SPNEGO_ACCEPT_INCOMPLETE; } else { negResult = SPNEGO_REJECT; } data = asn1_init(talloc_tos()); if (data == NULL) { return data_blob_null; } asn1_push_tag(data, ASN1_CONTEXT(1)); asn1_push_tag(data, ASN1_SEQUENCE(0)); asn1_push_tag(data, ASN1_CONTEXT(0)); asn1_write_enumerated(data, negResult); asn1_pop_tag(data); if (mechOID) { asn1_push_tag(data,ASN1_CONTEXT(1)); asn1_write_OID(data, mechOID); asn1_pop_tag(data); } if (reply && reply->data != NULL) { asn1_push_tag(data,ASN1_CONTEXT(2)); asn1_write_OctetString(data, reply->data, reply->length); asn1_pop_tag(data); } if (mechlistMIC && mechlistMIC->data != NULL) { asn1_push_tag(data, ASN1_CONTEXT(3)); asn1_write_OctetString(data, mechlistMIC->data, mechlistMIC->length); asn1_pop_tag(data); } asn1_pop_tag(data); asn1_pop_tag(data); ret = data_blob_talloc(ctx, data->data, data->length); asn1_free(data); return ret; }
/* generate a negTokenTarg packet given a list of OIDs and a security blob */ DATA_BLOB gen_negTokenTarg(const char *OIDs[], DATA_BLOB blob) { int i; ASN1_DATA data; DATA_BLOB ret; memset(&data, 0, sizeof(data)); asn1_push_tag(&data, ASN1_APPLICATION(0)); asn1_write_OID(&data,OID_SPNEGO); asn1_push_tag(&data, ASN1_CONTEXT(0)); asn1_push_tag(&data, ASN1_SEQUENCE(0)); asn1_push_tag(&data, ASN1_CONTEXT(0)); asn1_push_tag(&data, ASN1_SEQUENCE(0)); for (i=0; OIDs[i]; i++) { asn1_write_OID(&data,OIDs[i]); } asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_push_tag(&data, ASN1_CONTEXT(2)); asn1_write_OctetString(&data,blob.data,blob.length); asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_pop_tag(&data); asn1_pop_tag(&data); if (data.has_error) { DEBUG(1,("Failed to build negTokenTarg at offset %d\n", (int)data.ofs)); asn1_free(&data); } ret = data_blob(data.data, data.length); asn1_free(&data); return ret; }
/* generate a minimal SPNEGO response packet. Doesn't contain much. */ DATA_BLOB spnego_gen_auth_response(DATA_BLOB *reply, NTSTATUS nt_status, const char *mechOID) { ASN1_DATA data; DATA_BLOB ret; uint8 negResult; if (NT_STATUS_IS_OK(nt_status)) { negResult = SPNEGO_NEG_RESULT_ACCEPT; } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { negResult = SPNEGO_NEG_RESULT_INCOMPLETE; } else { negResult = SPNEGO_NEG_RESULT_REJECT; } ZERO_STRUCT(data); asn1_push_tag(&data, ASN1_CONTEXT(1)); asn1_push_tag(&data, ASN1_SEQUENCE(0)); asn1_push_tag(&data, ASN1_CONTEXT(0)); asn1_write_enumerated(&data, negResult); asn1_pop_tag(&data); if (reply->data != NULL) { asn1_push_tag(&data,ASN1_CONTEXT(1)); asn1_write_OID(&data, mechOID); asn1_pop_tag(&data); asn1_push_tag(&data,ASN1_CONTEXT(2)); asn1_write_OctetString(&data, reply->data, reply->length); asn1_pop_tag(&data); } asn1_pop_tag(&data); asn1_pop_tag(&data); ret = data_blob(data.data, data.length); asn1_free(&data); return ret; }
bool spnego_mech_list_blob(TALLOC_CTX *mem_ctx, char **oid_list, DATA_BLOB *raw_data) { ASN1_DATA *data; unsigned int idx; if (!oid_list || !oid_list[0] || !raw_data) { return false; } data = asn1_init(talloc_tos()); if (data == NULL) { return false; } asn1_push_tag(data, ASN1_SEQUENCE(0)); for (idx = 0; oid_list[idx]; idx++) { asn1_write_OID(data, oid_list[idx]); } asn1_pop_tag(data); if (data->has_error) { DEBUG(3, (__location__ " failed at %d\n", (int)data->ofs)); asn1_free(data); return false; } *raw_data = data_blob_talloc(mem_ctx, data->data, data->length); if (!raw_data->data) { DEBUG(3, (__location__": data_blob_talloc() failed!\n")); asn1_free(data); return false; } asn1_free(data); return true; }
static bool write_negTokenTarg(struct asn1_data *asn1, struct spnego_negTokenTarg *token) { asn1_push_tag(asn1, ASN1_CONTEXT(1)); asn1_push_tag(asn1, ASN1_SEQUENCE(0)); if (token->negResult != SPNEGO_NONE_RESULT) { asn1_push_tag(asn1, ASN1_CONTEXT(0)); asn1_write_enumerated(asn1, token->negResult); asn1_pop_tag(asn1); } if (token->supportedMech) { asn1_push_tag(asn1, ASN1_CONTEXT(1)); asn1_write_OID(asn1, token->supportedMech); asn1_pop_tag(asn1); } if (token->responseToken.data) { asn1_push_tag(asn1, ASN1_CONTEXT(2)); asn1_write_OctetString(asn1, token->responseToken.data, token->responseToken.length); asn1_pop_tag(asn1); } if (token->mechListMIC.data) { asn1_push_tag(asn1, ASN1_CONTEXT(3)); asn1_write_OctetString(asn1, token->mechListMIC.data, token->mechListMIC.length); asn1_pop_tag(asn1); } asn1_pop_tag(asn1); asn1_pop_tag(asn1); return !asn1->has_error; }
static bool write_negTokenInit(struct asn1_data *asn1, struct spnego_negTokenInit *token) { asn1_push_tag(asn1, ASN1_CONTEXT(0)); asn1_push_tag(asn1, ASN1_SEQUENCE(0)); /* Write mechTypes */ if (token->mechTypes && *token->mechTypes) { int i; asn1_push_tag(asn1, ASN1_CONTEXT(0)); asn1_push_tag(asn1, ASN1_SEQUENCE(0)); for (i = 0; token->mechTypes[i]; i++) { asn1_write_OID(asn1, token->mechTypes[i]); } asn1_pop_tag(asn1); asn1_pop_tag(asn1); } /* write reqFlags */ if (token->reqFlags & SPNEGO_REQ_FLAG) { int flags = token->reqFlags & ~SPNEGO_REQ_FLAG; asn1_push_tag(asn1, ASN1_CONTEXT(1)); asn1_write_Integer(asn1, flags); asn1_pop_tag(asn1); } /* write mechToken */ if (token->mechToken.data) { asn1_push_tag(asn1, ASN1_CONTEXT(2)); asn1_write_OctetString(asn1, token->mechToken.data, token->mechToken.length); asn1_pop_tag(asn1); } /* write mechListMIC */ if (token->mechListMIC.data) { asn1_push_tag(asn1, ASN1_CONTEXT(3)); #if 0 /* This is what RFC 2478 says ... */ asn1_write_OctetString(asn1, token->mechListMIC.data, token->mechListMIC.length); #else /* ... but unfortunately this is what Windows sends/expects */ asn1_push_tag(asn1, ASN1_SEQUENCE(0)); asn1_push_tag(asn1, ASN1_CONTEXT(0)); asn1_push_tag(asn1, ASN1_GENERAL_STRING); asn1_write(asn1, token->mechListMIC.data, token->mechListMIC.length); asn1_pop_tag(asn1); asn1_pop_tag(asn1); asn1_pop_tag(asn1); #endif asn1_pop_tag(asn1); } asn1_pop_tag(asn1); asn1_pop_tag(asn1); return !asn1->has_error; }
DATA_BLOB spnego_gen_negTokenInit(TALLOC_CTX *ctx, const char *OIDs[], DATA_BLOB *psecblob, const char *principal) { int i; ASN1_DATA *data; DATA_BLOB ret = data_blob_null; data = asn1_init(talloc_tos()); if (data == NULL) { return data_blob_null; } if (!asn1_push_tag(data,ASN1_APPLICATION(0))) goto err; if (!asn1_write_OID(data,OID_SPNEGO)) goto err; if (!asn1_push_tag(data,ASN1_CONTEXT(0))) goto err; if (!asn1_push_tag(data,ASN1_SEQUENCE(0))) goto err; if (!asn1_push_tag(data,ASN1_CONTEXT(0))) goto err; if (!asn1_push_tag(data,ASN1_SEQUENCE(0))) goto err; for (i=0; OIDs[i]; i++) { if (!asn1_write_OID(data,OIDs[i])) goto err; } if (!asn1_pop_tag(data)) goto err; if (!asn1_pop_tag(data)) goto err; if (psecblob && psecblob->length && psecblob->data) { if (!asn1_push_tag(data, ASN1_CONTEXT(2))) goto err; if (!asn1_write_OctetString(data,psecblob->data, psecblob->length)) goto err; if (!asn1_pop_tag(data)) goto err; } if (principal) { if (!asn1_push_tag(data, ASN1_CONTEXT(3))) goto err; if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) goto err; if (!asn1_push_tag(data, ASN1_CONTEXT(0))) goto err; if (!asn1_write_GeneralString(data,principal)) goto err; if (!asn1_pop_tag(data)) goto err; if (!asn1_pop_tag(data)) goto err; if (!asn1_pop_tag(data)) goto err; } if (!asn1_pop_tag(data)) goto err; if (!asn1_pop_tag(data)) goto err; if (!asn1_pop_tag(data)) goto err; if (!asn1_extract_blob(data, ctx, &ret)) { goto err; } err: if (asn1_has_error(data)) { DEBUG(1, ("Failed to build negTokenInit at offset %d\n", (int)asn1_current_ofs(data))); } asn1_free(data); return ret; }