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32 lines
940 B
32 lines
940 B
#ifndef LIGHTNING_COMMON_CRYPTOMSG_H
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#define LIGHTNING_COMMON_CRYPTOMSG_H
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#include "config.h"
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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#include <common/crypto_state.h>
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/* BOLT #8:
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*
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* ### Receiving and Decrypting Messages
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*
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* In order to decrypt the _next_ message in the network stream, the
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* following steps are completed:
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*
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* 1. Read _exactly_ 18 bytes from the network buffer.
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*/
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#define CRYPTOMSG_HDR_SIZE 18
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/* BOLT #8:
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*
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* 4. Read _exactly_ `l+16` bytes from the network buffer
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*/
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#define CRYPTOMSG_BODY_OVERHEAD 16
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/* Low-level functions for sync comms: doesn't discard unknowns! */
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u8 *cryptomsg_encrypt_msg(const tal_t *ctx,
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struct crypto_state *cs,
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const u8 *msg);
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bool cryptomsg_decrypt_header(struct crypto_state *cs, u8 hdr[18], u16 *lenp);
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u8 *cryptomsg_decrypt_body(const tal_t *ctx,
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struct crypto_state *cs, const u8 *in);
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#endif /* LIGHTNING_COMMON_CRYPTOMSG_H */
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