diff options
Diffstat (limited to 'libs/libsodium/src/include/sodium/crypto_stream_chacha20.h')
-rw-r--r-- | libs/libsodium/src/include/sodium/crypto_stream_chacha20.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/libs/libsodium/src/include/sodium/crypto_stream_chacha20.h b/libs/libsodium/src/include/sodium/crypto_stream_chacha20.h new file mode 100644 index 0000000000..d3e2b234ef --- /dev/null +++ b/libs/libsodium/src/include/sodium/crypto_stream_chacha20.h @@ -0,0 +1,98 @@ +#ifndef crypto_stream_chacha20_H +#define crypto_stream_chacha20_H + +/* + * WARNING: This is just a stream cipher. It is NOT authenticated encryption. + * While it provides some protection against eavesdropping, it does NOT + * provide any security against active attacks. + * Unless you know what you're doing, what you are looking for is probably + * the crypto_box functions. + */ + +#include <stddef.h> +#include <stdint.h> +#include "export.h" + +#ifdef __cplusplus +# ifdef __GNUC__ +# pragma GCC diagnostic ignored "-Wlong-long" +# endif +extern "C" { +#endif + +#define crypto_stream_chacha20_KEYBYTES 32U +SODIUM_EXPORT +size_t crypto_stream_chacha20_keybytes(void); + +#define crypto_stream_chacha20_NONCEBYTES 8U +SODIUM_EXPORT +size_t crypto_stream_chacha20_noncebytes(void); + +#define crypto_stream_chacha20_MESSAGEBYTES_MAX SODIUM_SIZE_MAX +SODIUM_EXPORT +size_t crypto_stream_chacha20_messagebytes_max(void); + +/* ChaCha20 with a 64-bit nonce and a 64-bit counter, as originally designed */ + +SODIUM_EXPORT +int crypto_stream_chacha20(unsigned char *c, unsigned long long clen, + const unsigned char *n, const unsigned char *k); + +SODIUM_EXPORT +int crypto_stream_chacha20_xor(unsigned char *c, const unsigned char *m, + unsigned long long mlen, const unsigned char *n, + const unsigned char *k); + +SODIUM_EXPORT +int crypto_stream_chacha20_xor_ic(unsigned char *c, const unsigned char *m, + unsigned long long mlen, + const unsigned char *n, uint64_t ic, + const unsigned char *k); + +SODIUM_EXPORT +void crypto_stream_chacha20_keygen(unsigned char k[crypto_stream_chacha20_KEYBYTES]); + +/* ChaCha20 with a 96-bit nonce and a 32-bit counter (IETF) */ + +#define crypto_stream_chacha20_ietf_KEYBYTES 32U +SODIUM_EXPORT +size_t crypto_stream_chacha20_ietf_keybytes(void); + +#define crypto_stream_chacha20_ietf_NONCEBYTES 12U +SODIUM_EXPORT +size_t crypto_stream_chacha20_ietf_noncebytes(void); + +#define crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX \ + SODIUM_MIN(SODIUM_SIZE_MAX, 64ULL * (1ULL << 32)) +SODIUM_EXPORT +size_t crypto_stream_chacha20_ietf_messagebytes_max(void); + +SODIUM_EXPORT +int crypto_stream_chacha20_ietf(unsigned char *c, unsigned long long clen, + const unsigned char *n, const unsigned char *k); + +SODIUM_EXPORT +int crypto_stream_chacha20_ietf_xor(unsigned char *c, const unsigned char *m, + unsigned long long mlen, const unsigned char *n, + const unsigned char *k); + +SODIUM_EXPORT +int crypto_stream_chacha20_ietf_xor_ic(unsigned char *c, const unsigned char *m, + unsigned long long mlen, + const unsigned char *n, uint32_t ic, + const unsigned char *k); + +SODIUM_EXPORT +void crypto_stream_chacha20_ietf_keygen(unsigned char k[crypto_stream_chacha20_ietf_KEYBYTES]); + +/* Aliases */ + +#define crypto_stream_chacha20_IETF_KEYBYTES crypto_stream_chacha20_ietf_KEYBYTES +#define crypto_stream_chacha20_IETF_NONCEBYTES crypto_stream_chacha20_ietf_NONCEBYTES +#define crypto_stream_chacha20_IETF_MESSAGEBYTES_MAX crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX + +#ifdef __cplusplus +} +#endif + +#endif |