| #ifndef SPX_UTILS_H |
| #define SPX_UTILS_H |
| |
| #include <stdint.h> |
| |
| #include "compat.h" |
| #include "context.h" |
| #include "params.h" |
| |
| /* To support MSVC use alloca() instead of VLAs. See #20. */ |
| |
| /** |
| * Converts the value of 'in' to 'outlen' bytes in big-endian byte order. |
| */ |
| #define ull_to_bytes SPX_NAMESPACE(ull_to_bytes) |
| void ull_to_bytes(unsigned char *out, unsigned int outlen, |
| unsigned long long in); |
| #define u32_to_bytes SPX_NAMESPACE(u32_to_bytes) |
| void u32_to_bytes(unsigned char *out, uint32_t in); |
| |
| /** |
| * Converts the inlen bytes in 'in' from big-endian byte order to an integer. |
| */ |
| #define bytes_to_ull SPX_NAMESPACE(bytes_to_ull) |
| unsigned long long bytes_to_ull(const unsigned char *in, unsigned int inlen); |
| |
| /** |
| * Computes a root node given a leaf and an auth path. |
| * Expects address to be complete other than the tree_height and tree_index. |
| */ |
| #define compute_root SPX_NAMESPACE(compute_root) |
| void compute_root(unsigned char *root, const unsigned char *leaf, |
| uint32_t leaf_idx, uint32_t idx_offset, |
| const unsigned char *auth_path, uint32_t tree_height, |
| const spx_ctx *ctx, uint32_t addr[8]); |
| |
| /** |
| * For a given leaf index, computes the authentication path and the resulting |
| * root node using Merkle's TreeHash algorithm. |
| * Expects the layer and tree parts of the tree_addr to be set, as well as the |
| * tree type (i.e. SPX_ADDR_TYPE_HASHTREE or SPX_ADDR_TYPE_FORSTREE). |
| * Applies the offset idx_offset to indices before building addresses, so that |
| * it is possible to continue counting indices across trees. |
| */ |
| #define treehash SPX_NAMESPACE(treehash) |
| void treehash(unsigned char *root, unsigned char *auth_path, |
| const spx_ctx *ctx, |
| uint32_t leaf_idx, uint32_t idx_offset, uint32_t tree_height, |
| void (*gen_leaf)( |
| unsigned char * /* leaf */, |
| const spx_ctx *ctx /* ctx */, |
| uint32_t /* addr_idx */, const uint32_t[8] /* tree_addr */), |
| uint32_t tree_addr[8]); |
| |
| #endif |
