capability.h

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/* 2025-2026 Quantum Resistant Cryptographic Solutions Corporation
 * All Rights Reserved.
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 * Written by: John G. Underhill
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 */
 
#ifndef UDIF_CAPABILITY_H
#define UDIF_CAPABILITY_H
 
#include "udif.h"


#define UDIF_CAPABILITY_POLICY_SIZE 4U

#define UDIF_CAPABILITY_ENCODED_SIZE (UDIF_CRYPTO_HASH_SIZE + \
    UDIF_CRYPTO_MAC_SIZE + \
    UDIF_SERIAL_NUMBER_SIZE + \
    UDIF_SERIAL_NUMBER_SIZE + \
    UDIF_CAPABILITY_BITMAP_SIZE + \
    UDIF_VALID_TIME_SIZE + \
    UDIF_CAPABILITY_BITMAP_SIZE + \
    UDIF_CAPABILITY_POLICY_SIZE)

#define UDIF_CAPABILITY_SIGNED_SIZE (UDIF_SERIAL_NUMBER_SIZE + \
    UDIF_SERIAL_NUMBER_SIZE + \
    UDIF_CAPABILITY_BITMAP_SIZE + \
    UDIF_VALID_TIME_SIZE + \
    UDIF_CAPABILITY_BITMAP_SIZE + \
    UDIF_CAPABILITY_POLICY_SIZE)

UDIF_EXPORT_API typedef struct udif_capability
{
    uint8_t digest[UDIF_CRYPTO_HASH_SIZE];       
    uint8_t tag[UDIF_CRYPTO_MAC_SIZE];           
    uint8_t issuedby[UDIF_SERIAL_NUMBER_SIZE];   
    uint8_t issuedto[UDIF_SERIAL_NUMBER_SIZE];   
    uint64_t scopebitmap;                        
    uint64_t validto;                            
    uint64_t verbsbitmap;                        
    uint32_t policy;                          
} udif_capability;
 

 
static const char UDIF_CAPABILITY_ERROR_STRINGS[][UDIF_ERROR_STRING_SIZE] =
{
    "No error",
    "Capability denied by policy",
    "Empty capability mask",
    "Conflicting capability bits"
};


UDIF_EXPORT_API typedef enum udif_capability_id
{
    udif_capability_issue_certificate = 0x00U,     
    udif_capability_revoke_certificate = 0x01U,   
    udif_capability_issue_token = 0x02U,     
    udif_capability_validate_token = 0x03U,       
    udif_capability_register_issuer = 0x04U, 
    udif_capability_rotate_keys = 0x05U,     
    udif_capability_directory_query = 0x06U, 
    udif_capability_audit_logging_access = 0x07U,   
    udif_capability_admin = 0x08U              
} udif_capability_id;

UDIF_EXPORT_API typedef enum udif_capability_verbs
{
    udif_capability_query_exist = 0U,            
    udif_capability_query_owner_binding = 1U,    
    udif_capability_query_attr_bucket = 2U,        
    udif_capability_prove_membership = 3U,      
    udif_capability_forward_query = 4U,            
    udif_capability_admin_enroll = 5U,          
    udif_capability_admin_suspend = 6U,            
    udif_capability_admin_resume = 7U,          
    udif_capability_admin_revoke = 8U,          
    udif_capability_admin_branch_create = 9U,    
    udif_capability_admin_branch_retire = 10U,   
    udif_capability_registry_commit = 11U,       
    udif_capability_tx_create = 12U,            
    udif_capability_tx_accept = 13U,            
    udif_capability_logging_anchor_send = 14U,  
    udif_capability_logging_anchor_verify = 15U,
    udif_capability_treaty_negotiate = 16U,     
    udif_capability_treaty_query_exec = 17U,    
    udif_capability_treaty_query_origin = 18U,  
    udif_capability_telemetry_export = 19U,     
    udif_capability_error_report = 20U          
} udif_capability_verbs;

UDIF_EXPORT_API typedef enum udif_capability_scopes
{
    udif_scope_local = 0U,                      
    udif_scope_intra_domain = 1U,                
    udif_scope_treaty = 2U                     
} udif_capability_scopes;

UDIF_EXPORT_API bool udif_capability_allows_scope(const udif_capability* capability, uint32_t scope);

UDIF_EXPORT_API bool udif_capability_allows_verb(const udif_capability* capability, uint32_t verb);

UDIF_EXPORT_API void udif_capability_clear(udif_capability* capability);

UDIF_EXPORT_API udif_errors udif_capability_create(udif_capability* capability, uint32_t verbsbitmap, uint32_t scopebitmap, const uint8_t* issuedto,
    const uint8_t* issuedby, uint64_t validto, uint32_t policy, const uint8_t* issuerkey);

UDIF_EXPORT_API udif_errors udif_capability_compute_digest(uint8_t* digest, const udif_capability* capability);

UDIF_EXPORT_API udif_errors udif_capability_deserialize(udif_capability* capability, const uint8_t* input, size_t inplen);

UDIF_EXPORT_API bool udif_capability_grants_permission(const udif_capability* capability, uint32_t verb, uint32_t scope, uint64_t ctime);

UDIF_EXPORT_API bool udif_capability_is_expired(const udif_capability* capability, uint64_t ctime);

UDIF_EXPORT_API udif_errors udif_capability_serialize(uint8_t* output, size_t outlen, const udif_capability* capability);

UDIF_EXPORT_API bool udif_capability_verify(const udif_capability* capability, const uint8_t* issuerkey);
 
#endif