diff options
Diffstat (limited to 'src/ext/ed25519/ref10/crypto_int32.h')
| -rw-r--r-- | src/ext/ed25519/ref10/crypto_int32.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/ext/ed25519/ref10/crypto_int32.h b/src/ext/ed25519/ref10/crypto_int32.h new file mode 100644 index 0000000000..dd13c91bd0 --- /dev/null +++ b/src/ext/ed25519/ref10/crypto_int32.h @@ -0,0 +1,25 @@ +/* Added for Tor. */ + +#ifndef CRYPTO_INT32_H +#define CRYPTO_INT32_H + +#include "torint.h" +#define crypto_int32 int32_t +#define crypto_uint32 uint32_t + +/* + Stop signed left shifts overflowing + by using unsigned types for bitwise operations + */ + +#ifndef OVERFLOW_SAFE_SIGNED_LSHIFT +#define OVERFLOW_SAFE_SIGNED_LSHIFT(s, lshift, utype, stype) \ + ((stype)((utype)(s) << (utype)(lshift))) +#endif + +#define SHL32(s, lshift) \ + OVERFLOW_SAFE_SIGNED_LSHIFT(s, lshift, crypto_uint32, crypto_int32) +#define SHL8(s, lshift) \ + OVERFLOW_SAFE_SIGNED_LSHIFT(s, lshift, unsigned char, signed char) + +#endif /* CRYPTO_INT32_H */ |