Tests at compile time instead of runtime
This commit is contained in:
Alain Mosnier
parent
b21a7b5529
commit
da12ae4e94
54
sha-256.c
54
sha-256.c
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@ -93,30 +93,31 @@ static int calc_chunk(uint8_t chunk[CHUNK_SIZE], struct buffer_state * state)
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memset(chunk, 0x00, left);
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chunk += left;
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if (sizeof len > 4) {
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chunk[0] = (uint8_t) (len >> 56);
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chunk[1] = (uint8_t) (len >> 48);
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chunk[2] = (uint8_t) (len >> 40);
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chunk[3] = (uint8_t) (len >> 32);
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} else {
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chunk[0] = 0;
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chunk[1] = 0;
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chunk[2] = 0;
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chunk[3] = 0;
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}
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if (sizeof len > 2) {
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chunk[4] = (uint8_t) (len >> 24);
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chunk[5] = (uint8_t) (len >> 16);
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} else {
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chunk[4] = 0;
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chunk[5] = 0;
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}
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#if SIZE_MAX > UINT32_MAX
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chunk[0] = (uint8_t) (len >> 56);
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chunk[1] = (uint8_t) (len >> 48);
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chunk[2] = (uint8_t) (len >> 40);
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chunk[3] = (uint8_t) (len >> 32);
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#else
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chunk[0] = 0;
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chunk[1] = 0;
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chunk[2] = 0;
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chunk[3] = 0;
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#endif
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#if SIZE_MAX > UINT16_MAX
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chunk[4] = (uint8_t) (len >> 24);
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chunk[5] = (uint8_t) (len >> 16);
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#else
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chunk[4] = 0;
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chunk[5] = 0;
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#endif
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if (sizeof len > 1) {
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chunk[6] = (uint8_t) (len >> 8);
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} else {
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chunk[6] = 0;
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}
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#if SIZE_MAX > UINT8_MAX
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chunk[6] = (uint8_t) (len >> 8);
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#else
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chunk[6] = 0;
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#endif
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chunk[7] = (uint8_t) len;
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@ -181,16 +182,17 @@ void calc_sha_256(uint8_t hash[32], const void * input, size_t len)
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*/
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uint32_t w[64];
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const uint8_t *p = chunk;
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int i;
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memset(w, 0x00, sizeof w);
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for (int i = 0; i < 16; i++) {
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for (i = 0; i < 16; i++) {
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w[i] = (uint32_t) p[0] << 24 | (uint32_t) p[1] << 16 |
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(uint32_t) p[2] << 8 | (uint32_t) p[3];
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p += 4;
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}
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/* Extend the first 16 words into the remaining 48 words w[16..63] of the message schedule array: */
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for (int i = 16; i < 64; i++) {
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for (i = 16; i < 64; i++) {
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const uint32_t s0 = right_rot(w[i - 15], 7) ^ right_rot(w[i - 15], 18) ^ (w[i - 15] >> 3);
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const uint32_t s1 = right_rot(w[i - 2], 17) ^ right_rot(w[i - 2], 19) ^ (w[i - 2] >> 10);
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w[i] = w[i - 16] + s0 + w[i - 7] + s1;
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@ -207,7 +209,7 @@ void calc_sha_256(uint8_t hash[32], const void * input, size_t len)
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h = h7;
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/* Compression function main loop: */
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for (int i = 0; i < 64; i++) {
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for (i = 0; i < 64; i++) {
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const uint32_t s1 = right_rot(e, 6) ^ right_rot(e, 11) ^ right_rot(e, 25);
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const uint32_t ch = (e & f) ^ (~e & g);
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const uint32_t temp1 = h + s1 + ch + k[i] + w[i];
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34
test.c
34
test.c
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@ -35,15 +35,40 @@ static const struct vector VECTORS[] = {
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"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1"
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},
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{
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"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoi"
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"jklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
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"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmno"
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"ijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
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"cf5b16a778af8380036ce59e7b0492370b249b11e8f07a51afac45037afee9d1"
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},
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{
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"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmno"
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"ijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstuabcdefghbcdefghi"
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"cdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopq"
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"klmnopqrlmnopqrsmnopqrstnopqrstuabcdefghbcdefghicdefghijdefghijk"
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"efghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrs"
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"mnopqrstnopqrstuabcdefghbcdefghicdefghijdefghijkefghijklfghijklm"
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"ghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"
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"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmno"
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"ijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstuabcdefghbcdefghi"
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"cdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopq"
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"klmnopqrlmnopqrsmnopqrstnopqrstuabcdefghbcdefghicdefghijdefghijk"
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"efghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrs"
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"mnopqrstnopqrstuabcdefghbcdefghicdefghijdefghijkefghijklfghijklm"
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"ghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu"
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"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmno"
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"ijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstuabcdefghbcdefghi"
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"cdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopq"
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"klmnopqrlmnopqrsmnopqrstnopqrstuabcdefghbcdefghicdefghijdefghijk"
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"efghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrs"
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"mnopqrstnopqrstuabcdefghbcdefghicdefghijdefghijkefghijklfghijklm"
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"ghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
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"c7273f978615fc09e6a567bb28586fa30b76a2c915ffcdc728d3414fceb63493"
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}
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};
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static void hash_to_string(char string[65], const uint8_t hash[32])
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{
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for (size_t i = 0; i < 32; i++) {
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size_t i;
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for (i = 0; i < 32; i++) {
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string += sprintf(string, "%02x", hash[i]);
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}
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}
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@ -66,7 +91,8 @@ static void test(const char input[], const char output[])
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int main(void)
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{
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for (size_t i = 0; i < (sizeof VECTORS / sizeof (struct vector)); i++) {
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size_t i;
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for (i = 0; i < (sizeof VECTORS / sizeof (struct vector)); i++) {
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const struct vector *vector = &VECTORS[i];
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test(vector->input, vector->output);
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}
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