22 lines
635 B
C
22 lines
635 B
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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#include "tomcrypt_private.h"
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#ifdef LTC_CHACHA20POLY1305_MODE
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/**
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Initialize an ChaCha20Poly1305 context (only the key)
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@param st [out] The destination of the ChaCha20Poly1305 state
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@param key The secret key
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@param keylen The length of the secret key (octets)
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@return CRYPT_OK if successful
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*/
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int chacha20poly1305_init(chacha20poly1305_state *st, const unsigned char *key, unsigned long keylen)
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{
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XMEMSET(st, 0, sizeof(*st));
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return chacha_setup(&st->chacha, key, keylen, 20);
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}
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#endif
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