libsodium: Needed for Dnscrypto-proxy Release 1.3.0
[tomato.git] / release / src / router / libsodium / src / libsodium / crypto_secretbox / xsalsa20poly1305 / ref / box_xsalsa20poly1305.c
blobf68334efcffc92ac3c352fcfdfa6b29df67a049e
1 #include "api.h"
2 #include "crypto_onetimeauth_poly1305.h"
3 #include "crypto_stream_xsalsa20.h"
5 int crypto_secretbox(
6 unsigned char *c,
7 const unsigned char *m,unsigned long long mlen,
8 const unsigned char *n,
9 const unsigned char *k
12 int i;
13 if (mlen < 32) return -1;
14 crypto_stream_xsalsa20_xor(c,m,mlen,n,k);
15 crypto_onetimeauth_poly1305(c + 16,c + 32,mlen - 32,c);
16 for (i = 0;i < 16;++i) c[i] = 0;
17 return 0;
20 int crypto_secretbox_open(
21 unsigned char *m,
22 const unsigned char *c,unsigned long long clen,
23 const unsigned char *n,
24 const unsigned char *k
27 int i;
28 unsigned char subkey[32];
29 if (clen < 32) return -1;
30 crypto_stream_xsalsa20(subkey,32,n,k);
31 if (crypto_onetimeauth_poly1305_verify(c + 16,c + 32,clen - 32,subkey) != 0) return -1;
32 crypto_stream_xsalsa20_xor(m,c,clen,n,k);
33 for (i = 0;i < 32;++i) m[i] = 0;
34 return 0;