#include #include #include "params.h" #include "xmss_core.h" int xmss_str_to_oid(uint32_t *oid, const char *s) { if (!strcmp(s, "XMSS-SHA2_10_256")) { *oid = 0x00000001; } else if (!strcmp(s, "XMSS-SHA2_16_256")) { *oid = 0x00000002; } else if (!strcmp(s, "XMSS-SHA2_20_256")) { *oid = 0x00000003; } else if (!strcmp(s, "XMSS-SHA2_10_512")) { *oid = 0x00000004; } else if (!strcmp(s, "XMSS-SHA2_16_512")) { *oid = 0x00000005; } else if (!strcmp(s, "XMSS-SHA2_20_512")) { *oid = 0x00000006; } else if (!strcmp(s, "XMSS-SHAKE_10_256")) { *oid = 0x00000007; } else if (!strcmp(s, "XMSS-SHAKE_16_256")) { *oid = 0x00000008; } else if (!strcmp(s, "XMSS-SHAKE_20_256")) { *oid = 0x00000009; } else if (!strcmp(s, "XMSS-SHAKE_10_512")) { *oid = 0x0000000a; } else if (!strcmp(s, "XMSS-SHAKE_16_512")) { *oid = 0x0000000b; } else if (!strcmp(s, "XMSS-SHAKE_20_512")) { *oid = 0x0000000c; } else { return -1; } return 0; } int xmssmt_str_to_oid(uint32_t *oid, const char *s) { if (!strcmp(s, "XMSSMT-SHA2_20/2_256")) { *oid = 0x00000001; } else if (!strcmp(s, "XMSSMT-SHA2_20/4_256")) { *oid = 0x00000002; } else if (!strcmp(s, "XMSSMT-SHA2_40/2_256")) { *oid = 0x00000003; } else if (!strcmp(s, "XMSSMT-SHA2_40/4_256")) { *oid = 0x00000004; } else if (!strcmp(s, "XMSSMT-SHA2_40/8_256")) { *oid = 0x00000005; } else if (!strcmp(s, "XMSSMT-SHA2_60/3_256")) { *oid = 0x00000006; } else if (!strcmp(s, "XMSSMT-SHA2_60/6_256")) { *oid = 0x00000007; } else if (!strcmp(s, "XMSSMT-SHA2_60/12_256")) { *oid = 0x00000008; } else if (!strcmp(s, "XMSSMT-SHA2_20/2_512")) { *oid = 0x00000009; } else if (!strcmp(s, "XMSSMT-SHA2_20/4_512")) { *oid = 0x0000000a; } else if (!strcmp(s, "XMSSMT-SHA2_40/2_512")) { *oid = 0x0000000b; } else if (!strcmp(s, "XMSSMT-SHA2_40/4_512")) { *oid = 0x0000000c; } else if (!strcmp(s, "XMSSMT-SHA2_40/8_512")) { *oid = 0x0000000d; } else if (!strcmp(s, "XMSSMT-SHA2_60/3_512")) { *oid = 0x0000000e; } else if (!strcmp(s, "XMSSMT-SHA2_60/6_512")) { *oid = 0x0000000f; } else if (!strcmp(s, "XMSSMT-SHA2_60/12_512")) { *oid = 0x00000010; } else if (!strcmp(s, "XMSSMT-SHAKE_20/2_256")) { *oid = 0x00000011; } else if (!strcmp(s, "XMSSMT-SHAKE_20/4_256")) { *oid = 0x00000012; } else if (!strcmp(s, "XMSSMT-SHAKE_40/2_256")) { *oid = 0x00000013; } else if (!strcmp(s, "XMSSMT-SHAKE_40/4_256")) { *oid = 0x00000014; } else if (!strcmp(s, "XMSSMT-SHAKE_40/8_256")) { *oid = 0x00000015; } else if (!strcmp(s, "XMSSMT-SHAKE_60/3_256")) { *oid = 0x00000016; } else if (!strcmp(s, "XMSSMT-SHAKE_60/6_256")) { *oid = 0x00000017; } else if (!strcmp(s, "XMSSMT-SHAKE_60/12_256")) { *oid = 0x00000018; } else if (!strcmp(s, "XMSSMT-SHAKE_20/2_512")) { *oid = 0x00000019; } else if (!strcmp(s, "XMSSMT-SHAKE_20/4_512")) { *oid = 0x0000001a; } else if (!strcmp(s, "XMSSMT-SHAKE_40/2_512")) { *oid = 0x0000001b; } else if (!strcmp(s, "XMSSMT-SHAKE_40/4_512")) { *oid = 0x0000001c; } else if (!strcmp(s, "XMSSMT-SHAKE_40/8_512")) { *oid = 0x0000001d; } else if (!strcmp(s, "XMSSMT-SHAKE_60/3_512")) { *oid = 0x0000001e; } else if (!strcmp(s, "XMSSMT-SHAKE_60/6_512")) { *oid = 0x0000001f; } else if (!strcmp(s, "XMSSMT-SHAKE_60/12_512")) { *oid = 0x00000020; } else { return -1; } return 0; } int xmss_parse_oid(xmss_params *params, const uint32_t oid) { switch (oid) { case 0x00000001: case 0x00000002: case 0x00000003: case 0x00000004: case 0x00000005: case 0x00000006: params->func = XMSS_SHA2; break; case 0x00000007: case 0x00000008: case 0x00000009: case 0x0000000a: case 0x0000000b: case 0x0000000c: params->func = XMSS_SHAKE; break; default: return -1; } switch (oid) { case 0x00000001: case 0x00000002: case 0x00000003: case 0x00000007: case 0x00000008: case 0x00000009: params->n = 32; params->padding_len = 32; break; case 0x00000004: case 0x00000005: case 0x00000006: case 0x0000000a: case 0x0000000b: case 0x0000000c: params->n = 64; params->padding_len = 64; break; default: return -1; } switch (oid) { case 0x00000001: case 0x00000004: case 0x00000007: case 0x0000000a: params->full_height = 10; break; case 0x00000002: case 0x00000005: case 0x00000008: case 0x0000000b: params->full_height = 16; break; case 0x00000003: case 0x00000006: case 0x00000009: case 0x0000000c: params->full_height = 20; break; default: return -1; } params->d = 1; params->wots_w = 16; // TODO figure out sensible and legal values for this based on the above params->bds_k = 0; return xmss_xmssmt_initialize_params(params); } int xmssmt_parse_oid(xmss_params *params, const uint32_t oid) { switch (oid) { case 0x00000001: case 0x00000002: case 0x00000003: case 0x00000004: case 0x00000005: case 0x00000006: case 0x00000007: case 0x00000008: case 0x00000009: case 0x0000000a: case 0x0000000b: case 0x0000000c: case 0x0000000d: case 0x0000000e: case 0x0000000f: case 0x00000010: params->func = XMSS_SHA2; break; case 0x00000011: case 0x00000012: case 0x00000013: case 0x00000014: case 0x00000015: case 0x00000016: case 0x00000017: case 0x00000018: case 0x00000019: case 0x0000001a: case 0x0000001b: case 0x0000001c: case 0x0000001e: case 0x0000001d: case 0x0000001f: case 0x00000020: params->func = XMSS_SHAKE; break; default: return -1; } switch (oid) { case 0x00000001: case 0x00000002: case 0x00000003: case 0x00000004: case 0x00000005: case 0x00000006: case 0x00000007: case 0x00000008: case 0x00000011: case 0x00000012: case 0x00000013: case 0x00000014: case 0x00000015: case 0x00000016: case 0x00000017: case 0x00000018: params->n = 32; params->padding_len = 32; break; case 0x00000009: case 0x0000000a: case 0x0000000b: case 0x0000000c: case 0x0000000d: case 0x0000000e: case 0x0000000f: case 0x00000010: case 0x00000019: case 0x0000001a: case 0x0000001b: case 0x0000001c: case 0x0000001d: case 0x0000001e: case 0x0000001f: case 0x00000020: params->n = 64; params->padding_len = 64; break; default: return -1; } switch (oid) { case 0x00000001: case 0x00000002: case 0x00000009: case 0x0000000a: case 0x00000011: case 0x00000012: case 0x00000019: case 0x0000001a: params->full_height = 20; break; case 0x00000003: case 0x00000004: case 0x00000005: case 0x0000000b: case 0x0000000c: case 0x0000000d: case 0x00000013: case 0x00000014: case 0x00000015: case 0x0000001b: case 0x0000001c: case 0x0000001d: params->full_height = 40; break; case 0x00000006: case 0x00000007: case 0x00000008: case 0x0000000e: case 0x0000000f: case 0x00000010: case 0x00000016: case 0x00000017: case 0x00000018: case 0x0000001e: case 0x0000001f: case 0x00000020: params->full_height = 60; break; default: return -1; } switch (oid) { case 0x00000001: case 0x00000003: case 0x00000009: case 0x0000000b: case 0x00000011: case 0x00000013: case 0x00000019: case 0x0000001b: params->d = 2; break; case 0x00000002: case 0x00000004: case 0x0000000a: case 0x0000000c: case 0x00000012: case 0x00000014: case 0x0000001a: case 0x0000001c: params->d = 4; break; case 0x00000005: case 0x0000000d: case 0x00000015: case 0x0000001d: params->d = 8; break; case 0x00000006: case 0x0000000e: case 0x00000016: case 0x0000001e: params->d = 3; break; case 0x00000007: case 0x0000000f: case 0x00000017: case 0x0000001f: params->d = 6; break; case 0x00000008: case 0x00000010: case 0x00000018: case 0x00000020: params->d = 12; break; default: return -1; } params->wots_w = 16; // TODO figure out sensible and legal values for this based on the above params->bds_k = 0; return xmss_xmssmt_initialize_params(params); } /** * Given a params struct where the following properties have been initialized; * - full_height; the height of the complete (hyper)tree * - n; the number of bytes of hash function output * - d; the number of layers (d > 1 implies XMSSMT) * - func; one of {XMSS_SHA2, XMSS_SHAKE} * - wots_w; the Winternitz parameter * - optionally, bds_k; the BDS traversal trade-off parameter, * this function initializes the remainder of the params structure. */ int xmss_xmssmt_initialize_params(xmss_params *params) { params->tree_height = params->full_height / params->d; if (params->wots_w == 4) { params->wots_log_w = 2; params->wots_len1 = 8 * params->n / params->wots_log_w; /* len_2 = floor(log(len_1 * (w - 1)) / log(w)) + 1 */ params->wots_len2 = 5; } else if (params->wots_w == 16) { params->wots_log_w = 4; params->wots_len1 = 8 * params->n / params->wots_log_w; /* len_2 = floor(log(len_1 * (w - 1)) / log(w)) + 1 */ params->wots_len2 = 3; } else if (params->wots_w == 256) { params->wots_log_w = 8; params->wots_len1 = 8 * params->n / params->wots_log_w; /* len_2 = floor(log(len_1 * (w - 1)) / log(w)) + 1 */ params->wots_len2 = 2; } else { return -1; } params->wots_len = params->wots_len1 + params->wots_len2; params->wots_sig_bytes = params->wots_len * params->n; if (params->d == 1) { // Assume this is XMSS, not XMSS^MT /* In XMSS, always use fixed 4 bytes for index_bytes */ params->index_bytes = 4; } else { /* In XMSS^MT, round index_bytes up to nearest byte. */ params->index_bytes = (params->full_height + 7) / 8; } params->sig_bytes = (params->index_bytes + params->n + params->d * params->wots_sig_bytes + params->full_height * params->n); params->pk_bytes = 2 * params->n; params->sk_bytes = xmss_xmssmt_core_sk_bytes(params); return 0; }