base: add sha256sum
This commit is contained in:
Mark
@@ -17,22 +17,22 @@ clean:
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)
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$(O)/initrd.img: mkstage-etc mkstage-progs
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cd $(STAGE) && tar czf $(abspath $@) *
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@cd $(STAGE) && tar cf $(abspath $@) *
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mkdirs:
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mkdir -p $(DIRS)
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@mkdir -p $(DIRS)
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mkstage-etc:
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mkdir -p $(STAGE)/dev \
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@mkdir -p $(STAGE)/dev \
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$(STAGE)/mnt \
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$(STAGE)/bin \
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$(STAGE)/lib \
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$(STAGE)/sys \
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$(STAGE)/sbin \
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$(STAGE)/tmp
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cp -r etc $(STAGE)
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@cp -r etc $(STAGE)
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mkstage-progs:
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$(foreach dir,$(wildcard progs/*), \
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@$(foreach dir,$(wildcard progs/*), \
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CC=$(CC) DESTDIR=$(abspath $(STAGE)) make -C $(dir) install || exit 1; \
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)
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+8
-6
@@ -36,6 +36,7 @@ BINS=$(O)/bin/pager \
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$(O)/sbin/insmod \
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$(O)/bin/date \
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$(O)/bin/rm \
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$(O)/bin/sha256sum \
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$(O)/bin/cp \
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$(O)/bin/ls
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@@ -46,25 +47,26 @@ BINS=$(O)/bin/pager \
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all: mkdirs libs $(BINS)
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libs:
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if [ ! -f $(O)/lib/zlib/Makefile ]; then \
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@if [ ! -f $(O)/lib/zlib/Makefile ]; then \
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cd $(O)/lib/zlib && CC=$(CROSS_COMPILE)gcc AR=$(CROSS_COMPILE)ar $(S)/lib/zlib-1.2.11/configure; \
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fi
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make -C $(O)/lib/zlib
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@make -s -C $(O)/lib/zlib
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mkdirs:
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mkdir -p $(O)/bin $(O)/sbin $(O)/lib/zlib
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-mkdir -p $(O)/bin $(O)/sbin $(O)/lib/zlib
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clean:
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rm -rf $(O)
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install: all
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$(foreach bin,$(BINS), \
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@$(foreach bin,$(BINS), \
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install -m0755 $(bin) $(DESTDIR)/$(bin:$(O)/%=%); \
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)
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ln -sf /bin/pager $(DESTDIR)/bin/less
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ln -sf /bin/pager $(DESTDIR)/bin/more
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@ln -sf /bin/pager $(DESTDIR)/bin/less
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@ln -sf /bin/pager $(DESTDIR)/bin/more
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$(O)/%: %.c
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@printf " CC %s\n" "$@"
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@$(CC) $($(subst /,_,$(@:$(O)/%=%))_FLAGS) \
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$(LDFLAGS) $(CFLAGS) -o $@ \
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$< \
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@@ -0,0 +1,193 @@
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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static const uint32_t k[] = {
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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};
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struct sha256_state {
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size_t len;
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size_t bitlen;
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uint8_t data[64];
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uint32_t h[8];
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};
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static inline uint32_t _rol(uint32_t a, uint32_t b) {
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return (a << b) | (a >> (32 - b));
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}
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static inline uint32_t _ror(uint32_t a, uint32_t b) {
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return (a >> b) | (a << (32 - b));
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}
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void sha256_init(struct sha256_state *st) {
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st->len = 0;
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st->bitlen = 0;
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st->h[0] = 0x6a09e667;
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st->h[1] = 0xbb67ae85;
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st->h[2] = 0x3c6ef372;
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st->h[3] = 0xa54ff53a;
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st->h[4] = 0x510e527f;
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st->h[5] = 0x9b05688c;
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st->h[6] = 0x1f83d9ab;
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st->h[7] = 0x5be0cd19;
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}
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void sha256_transform(struct sha256_state *st, const uint8_t *data) {
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uint32_t a, b, c, d, e, f, g, h;
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uint32_t s0, s1;
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uint32_t w[64];
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size_t i;
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for (i = 0; i < 16; ++i) {
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w[i] = (data[i << 2] << 24) | (data[(i << 2) + 1] << 16) |
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(data[(i << 2) + 2] << 8) | data[(i << 2) + 3];
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}
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for (i = 16; i < 64; ++i) {
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s0 = _ror(w[i - 15], 7) ^ _ror(w[i - 15], 18) ^ (w[i - 15] >> 3);
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s1 = _ror(w[i - 2], 17) ^ _ror(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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}
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a = st->h[0];
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b = st->h[1];
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c = st->h[2];
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d = st->h[3];
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e = st->h[4];
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f = st->h[5];
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g = st->h[6];
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h = st->h[7];
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for (i = 0; i < 64; ++i) {
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uint32_t s1 = _ror(e, 6) ^ _ror(e, 11) ^ _ror(e, 25);
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uint32_t ch = (e & f) ^ ((~e) & g);
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uint32_t temp1 = h + s1 + ch + k[i] + w[i];
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uint32_t s0 = _ror(a, 2) ^ _ror(a, 13) ^ _ror(a, 22);
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uint32_t maj = (a & b) ^ (a & c) ^ (b & c);
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uint32_t temp2 = s0 + maj;
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h = g;
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g = f;
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f = e;
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e = d + temp1;
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d = c;
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c = b;
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b = a;
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a = temp1 + temp2;
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}
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st->h[0] += a;
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st->h[1] += b;
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st->h[2] += c;
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st->h[3] += d;
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st->h[4] += e;
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st->h[5] += f;
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st->h[6] += g;
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st->h[7] += h;
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}
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void sha256_update(struct sha256_state *st, const uint8_t *data, size_t len) {
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for (size_t i = 0; i < len; ++i) {
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st->data[st->len++] = data[i];
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if (st->len == 64) {
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sha256_transform(st, st->data);
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st->bitlen += 512;
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st->len = 0;
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}
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}
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}
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void sha256_final(struct sha256_state *st, uint8_t hash[]) {
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size_t i;
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i = st->len;
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// Pad the last chunk
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if (st->len < 56) {
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st->data[i++] = 0x80;
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while (i < 56) {
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st->data[i++] = 0x00;
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}
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} else {
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st->data[i++] = 0x80;
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while (i < 64) {
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st->data[i++] = 0x00;
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}
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sha256_transform(st, st->data);
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memset(st->data, 0, 56);
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}
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// Append total message length
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st->bitlen += st->len * 8;
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st->data[63] = st->bitlen & 0xFF;
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st->data[62] = (st->bitlen >> 8) & 0xFF;
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st->data[61] = (st->bitlen >> 16) & 0xFF;
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st->data[60] = (st->bitlen >> 24) & 0xFF;
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st->data[59] = (st->bitlen >> 32) & 0xFF;
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st->data[58] = (st->bitlen >> 40) & 0xFF;
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st->data[57] = (st->bitlen >> 48) & 0xFF;
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st->data[56] = (st->bitlen >> 56) & 0xFF;
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sha256_transform(st, st->data);
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// Reverse the bytes for proper endianness
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for (i = 0; i < 4; ++i) {
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hash[i ] = (st->h[0] >> (24 - i * 8)) & 0xFF;
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hash[i + 4] = (st->h[1] >> (24 - i * 8)) & 0xFF;
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hash[i + 8] = (st->h[2] >> (24 - i * 8)) & 0xFF;
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hash[i + 12] = (st->h[3] >> (24 - i * 8)) & 0xFF;
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hash[i + 16] = (st->h[4] >> (24 - i * 8)) & 0xFF;
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hash[i + 20] = (st->h[5] >> (24 - i * 8)) & 0xFF;
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hash[i + 24] = (st->h[6] >> (24 - i * 8)) & 0xFF;
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hash[i + 28] = (st->h[7] >> (24 - i * 8)) & 0xFF;
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}
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}
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static int do_sha256sum(const char *in) {
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struct sha256_state st;
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uint8_t hash[32];
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char buf[256];
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size_t bread;
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FILE *fp;
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if (!strcmp(in, "-")) {
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fp = stdin;
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} else {
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fp = fopen(in, "rb");
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if (!fp) {
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perror(in);
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return -1;
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}
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}
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sha256_init(&st);
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while ((bread = fread(buf, 1, sizeof(buf), fp)) > 0) {
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sha256_update(&st, (uint8_t *) buf, bread);
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}
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sha256_final(&st, hash);
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for (size_t i = 0; i < 32; ++i) {
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printf("%02hhx", hash[i]);
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}
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printf(" %s\n", in);
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return 0;
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}
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int main(int argc, char **argv) {
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if (argc == 2) {
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return do_sha256sum(argv[1]);
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} else {
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return do_sha256sum("-");
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}
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return 0;
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}
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