56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
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#ifndef LNSOCKET_CRYPTO_H
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#define LNSOCKET_CRYPTO_H
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#include <secp256k1.h>
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#include "typedefs.h"
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#define PUBKEY_CMPR_LEN 33
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struct secret {
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u8 data[32];
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};
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struct node_id {
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u8 k[PUBKEY_CMPR_LEN];
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};
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struct pubkey {
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secp256k1_pubkey pubkey;
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};
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struct privkey {
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struct secret secret;
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};
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struct keypair {
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struct pubkey pub;
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struct privkey priv;
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};
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struct crypto_state {
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/* Received and sent nonces. */
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u64 rn, sn;
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/* Sending and receiving keys. */
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struct secret sk, rk;
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/* Chaining key for re-keying */
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struct secret s_ck, r_ck;
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};
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void le64_nonce(unsigned char *npub, u64 nonce);
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void hkdf_two_keys(struct secret *out1, struct secret *out2,
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const struct secret *in1,
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const struct secret *in2);
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int cryptomsg_decrypt_body(struct crypto_state *cs, const u8 *in, size_t inlen, u8 *out, size_t outcap);
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int cryptomsg_decrypt_header(struct crypto_state *cs, u8 hdr[18], u16 *lenp);
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unsigned char *cryptomsg_encrypt_msg(struct crypto_state *cs, const u8 *msg, unsigned long long mlen, u8 *out, size_t *outlen, size_t outcap);
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static inline int cryptomsg_decrypt_size(size_t inlen)
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{
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return inlen - 16;
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}
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#endif /* LNSOCKET_CRYPTO_H */
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