void skein512_init(skein512_ctx_t *ctx, uint16_t outsize_b){
skein_config_t conf;
uint8_t null[UBI512_BLOCKSIZE_B];
memset(null, 0, UBI512_BLOCKSIZE_B);
memset(&conf, 0, sizeof(skein_config_t));
conf.schema[0] = 'S';
conf.schema[1] = 'H';
conf.schema[2] = 'A';
conf.schema[3] = '3';
conf.version = 1;
conf.out_length = outsize_b;
ctx->outsize_b = outsize_b;
ubi512_init(&(ctx->ubictx), null, UBI_TYPE_CFG);
ubi512_lastBlock(&(ctx->ubictx), &conf, 256);
ubi512_init(&(ctx->ubictx), ctx->ubictx.g, UBI_TYPE_MSG);
}
void testrun_stdtest_ubi512(uint16_t outsize){
ubi512_ctx_t ctx;
skein_config_t conf;
uint64_t iv[8];
uint8_t null[UBI512_BLOCKSIZE_B];
cli_putstr_P(PSTR("\r\n\r\nTest vectors for UBI (512 bits):"));
memset(&conf, 0, sizeof(skein_config_t));
memset(null, 0, UBI512_BLOCKSIZE_B);
ubi512_init(&ctx, null, UBI_TYPE_CFG);
conf.schema[0] = 'S';
conf.schema[1] = 'H';
conf.schema[2] = 'A';
conf.schema[3] = '3';
conf.version = 1;
conf.out_length = outsize;
ubi512_lastBlock(&ctx, &conf, 256);
ubi512_ctx2hash(iv, &ctx);
cli_putstr_P(PSTR("\r\nIV: "));
cli_hexdump_rev(&(iv[0]), 8);
cli_putstr_P(PSTR(" "));
cli_hexdump_rev(&(iv[1]), 8);
cli_putstr_P(PSTR(" "));
cli_hexdump_rev(&(iv[2]), 8);
cli_putstr_P(PSTR(" "));
cli_hexdump_rev(&(iv[3]), 8);
cli_putstr_P(PSTR("\r\n "));
cli_hexdump_rev(&(iv[4]), 8);
cli_putstr_P(PSTR(" "));
cli_hexdump_rev(&(iv[5]), 8);
cli_putstr_P(PSTR(" "));
cli_hexdump_rev(&(iv[6]), 8);
cli_putstr_P(PSTR(" "));
cli_hexdump_rev(&(iv[7]), 8);
}
void skein512_ctx2hash(void *dest, skein512_ctx_t *ctx){
ubi512_ctx_t uctx;
uint16_t outsize_b;
uint64_t counter=0;
uint8_t outbuffer[UBI512_BLOCKSIZE_B];
ubi512_init(&(ctx->ubictx), ctx->ubictx.g, UBI_TYPE_OUT);
outsize_b = ctx->outsize_b;
while(1){
memcpy(&uctx, &(ctx->ubictx), sizeof(ubi512_ctx_t));
ubi512_lastBlock(&uctx, &counter, 64);
ubi512_ctx2hash(outbuffer, &uctx);
if(outsize_b<=UBI512_BLOCKSIZE){
memcpy(dest, outbuffer, (ctx->outsize_b+7)/8);
break;
}else{
memcpy(dest, outbuffer, UBI512_BLOCKSIZE_B);
dest = (uint8_t*)dest + UBI512_BLOCKSIZE_B;
outsize_b -= UBI512_BLOCKSIZE;
counter++;
}
}
}