openpgp.h

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#pragma once
 
#include "../../common.h"
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
 
#define OPENPGP_TAG_PUBLIC_KEY 6
 
#define OPENPGP_TAG_SECRET_KEY 5
 
#define OPENPGP_TAG_USER_ID 13
 
#define OPENPGP_TAG_SIGNATURE 2
 
#define OPENPGP_ALGO_EDDSA 22
 
#define OPENPGP_ALGO_ECDH 18
 
typedef struct {
  uint8_t tag;       
  size_t length;     
  size_t header_len; 
  bool new_format;   
} openpgp_packet_header_t;
 
typedef struct {
  uint8_t version;    
  uint32_t created;   
  uint8_t algorithm;  
  uint8_t pubkey[32]; 
  uint64_t keyid;     
} openpgp_public_key_t;
 
typedef struct {
  uint8_t version;    
  uint32_t created;   
  uint8_t algorithm;  
  uint8_t pubkey[32]; 
  uint8_t seckey[32]; 
  uint64_t keyid;     
  bool is_encrypted;  
} openpgp_secret_key_t;
 
asciichat_error_t openpgp_parse_armored_pubkey(const char *armored_text, uint8_t ed25519_pk[32]);
 
asciichat_error_t openpgp_parse_armored_seckey(const char *armored_text, uint8_t ed25519_pk[32],
                                               uint8_t ed25519_sk[32]);
 
asciichat_error_t openpgp_parse_packet_header(const uint8_t *data, size_t data_len, openpgp_packet_header_t *header);
 
asciichat_error_t openpgp_parse_public_key_packet(const uint8_t *packet_body, size_t body_len,
                                                  openpgp_public_key_t *pubkey);
 
asciichat_error_t openpgp_parse_secret_key_packet(const uint8_t *packet_body, size_t body_len,
                                                  openpgp_secret_key_t *seckey);
 
asciichat_error_t openpgp_extract_ed25519_from_mpi(const uint8_t *mpi, size_t mpi_len, uint8_t ed25519_pk[32]);
 
asciichat_error_t openpgp_base64_decode(const char *base64, size_t base64_len, uint8_t **binary_out,
                                        size_t *binary_len);