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First 4 bytes are AD

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This commit is contained in:
angt
2016-02-04 09:35:37 +01:00
parent 8600bb625a
commit 48419d0e5c
1 changed files with 8 additions and 6 deletions
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14
mud.c
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@@ -365,14 +365,15 @@ int mud_encrypt (struct mud *mud, uint32_t nonce,
mud_write32(npub, nonce); mud_write32(npub, nonce);
crypto_aead_aes256gcm_encrypt_afternm( crypto_aead_aes256gcm_encrypt_afternm(
dst+4, NULL, dst+8, NULL,
src, src_size, src+4, src_size-4,
NULL, 0, src, 4,
NULL, NULL,
npub, npub,
(const crypto_aead_aes256gcm_state *)&mud->crypto.key); (const crypto_aead_aes256gcm_state *)&mud->crypto.key);
memcpy(dst, npub, 4); memcpy(dst, npub, 4);
memcpy(dst+4, src, 4);
return size; return size;
} }
@@ -393,12 +394,13 @@ int mud_decrypt (struct mud *mud, uint32_t *nonce,
unsigned char npub[crypto_aead_aes256gcm_NPUBBYTES] = {0}; unsigned char npub[crypto_aead_aes256gcm_NPUBBYTES] = {0};
memcpy(npub, src, 4); memcpy(npub, src, 4);
memcpy(dst, src+4, 4);
if (crypto_aead_aes256gcm_decrypt_afternm( if (crypto_aead_aes256gcm_decrypt_afternm(
dst, NULL, dst+4, NULL,
NULL, NULL,
src+4, src_size-4, src+8, src_size-8,
NULL, 0, src+4, 4,
npub, npub,
(const crypto_aead_aes256gcm_state *)&mud->crypto.key)) (const crypto_aead_aes256gcm_state *)&mud->crypto.key))
return -1; return -1;