diff options
Diffstat (limited to 'lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/hash_state.h')
| -rw-r--r-- | lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/hash_state.h | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/hash_state.h b/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/hash_state.h deleted file mode 100644 index 19fc335e2..000000000 --- a/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/hash_state.h +++ /dev/null @@ -1,26 +0,0 @@ -#ifndef SPX_HASH_STATE_H -#define SPX_HASH_STATE_H - -/** - * Defines the type of the hash function state. - * - * Don't be fooled into thinking this instance of SPHINCS+ isn't stateless! - * - * From Section 7.2.2 from the SPHINCS+ round-2 specification: - * - * Each of the instances of the tweakable hash function take PK.seed as its - * first input, which is constant for a given key pair – and, thus, across - * a single signature. This leads to a lot of redundant computation. To remedy - * this, we pad PK.seed to the length of a full 64-byte SHA-256 input block. - * Because of the Merkle-Damgård construction that underlies SHA-256, this - * allows for reuse of the intermediate SHA-256 state after the initial call to - * the compression function which improves performance. - * - * We pass this hash state around in functions, because otherwise we need to - * have a global variable. - */ - -#include "sha2.h" -#define hash_state sha256ctx - -#endif |