From 1bb8784dbe08848176c38b07286842136fa8db78 Mon Sep 17 00:00:00 2001 From: Mark Date: Mon, 24 Aug 2020 11:30:37 +0300 Subject: [PATCH] base: add sha256sum --- Makefile | 10 +- progs/base/Makefile | 14 +-- progs/base/bin/sha256sum.c | 193 +++++++++++++++++++++++++++++++++++++ 3 files changed, 206 insertions(+), 11 deletions(-) create mode 100644 progs/base/bin/sha256sum.c diff --git a/Makefile b/Makefile index 91f5d77..526df52 100644 --- a/Makefile +++ b/Makefile @@ -17,22 +17,22 @@ clean: ) $(O)/initrd.img: mkstage-etc mkstage-progs - cd $(STAGE) && tar czf $(abspath $@) * + @cd $(STAGE) && tar cf $(abspath $@) * mkdirs: - mkdir -p $(DIRS) + @mkdir -p $(DIRS) mkstage-etc: - mkdir -p $(STAGE)/dev \ + @mkdir -p $(STAGE)/dev \ $(STAGE)/mnt \ $(STAGE)/bin \ $(STAGE)/lib \ $(STAGE)/sys \ $(STAGE)/sbin \ $(STAGE)/tmp - cp -r etc $(STAGE) + @cp -r etc $(STAGE) mkstage-progs: - $(foreach dir,$(wildcard progs/*), \ + @$(foreach dir,$(wildcard progs/*), \ CC=$(CC) DESTDIR=$(abspath $(STAGE)) make -C $(dir) install || exit 1; \ ) diff --git a/progs/base/Makefile b/progs/base/Makefile index 9d01f6e..4f8ce0a 100644 --- a/progs/base/Makefile +++ b/progs/base/Makefile @@ -36,6 +36,7 @@ BINS=$(O)/bin/pager \ $(O)/sbin/insmod \ $(O)/bin/date \ $(O)/bin/rm \ + $(O)/bin/sha256sum \ $(O)/bin/cp \ $(O)/bin/ls @@ -46,25 +47,26 @@ BINS=$(O)/bin/pager \ all: mkdirs libs $(BINS) libs: - if [ ! -f $(O)/lib/zlib/Makefile ]; then \ + @if [ ! -f $(O)/lib/zlib/Makefile ]; then \ cd $(O)/lib/zlib && CC=$(CROSS_COMPILE)gcc AR=$(CROSS_COMPILE)ar $(S)/lib/zlib-1.2.11/configure; \ fi - make -C $(O)/lib/zlib + @make -s -C $(O)/lib/zlib mkdirs: - mkdir -p $(O)/bin $(O)/sbin $(O)/lib/zlib + -mkdir -p $(O)/bin $(O)/sbin $(O)/lib/zlib clean: rm -rf $(O) install: all - $(foreach bin,$(BINS), \ + @$(foreach bin,$(BINS), \ install -m0755 $(bin) $(DESTDIR)/$(bin:$(O)/%=%); \ ) - ln -sf /bin/pager $(DESTDIR)/bin/less - ln -sf /bin/pager $(DESTDIR)/bin/more + @ln -sf /bin/pager $(DESTDIR)/bin/less + @ln -sf /bin/pager $(DESTDIR)/bin/more $(O)/%: %.c + @printf " CC %s\n" "$@" @$(CC) $($(subst /,_,$(@:$(O)/%=%))_FLAGS) \ $(LDFLAGS) $(CFLAGS) -o $@ \ $< \ diff --git a/progs/base/bin/sha256sum.c b/progs/base/bin/sha256sum.c new file mode 100644 index 0000000..71e9cfa --- /dev/null +++ b/progs/base/bin/sha256sum.c @@ -0,0 +1,193 @@ +#include +#include +#include + +static const uint32_t k[] = { + 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 +}; + +struct sha256_state { + size_t len; + size_t bitlen; + uint8_t data[64]; + uint32_t h[8]; +}; + +static inline uint32_t _rol(uint32_t a, uint32_t b) { + return (a << b) | (a >> (32 - b)); +} + +static inline uint32_t _ror(uint32_t a, uint32_t b) { + return (a >> b) | (a << (32 - b)); +} + +void sha256_init(struct sha256_state *st) { + st->len = 0; + st->bitlen = 0; + st->h[0] = 0x6a09e667; + st->h[1] = 0xbb67ae85; + st->h[2] = 0x3c6ef372; + st->h[3] = 0xa54ff53a; + st->h[4] = 0x510e527f; + st->h[5] = 0x9b05688c; + st->h[6] = 0x1f83d9ab; + st->h[7] = 0x5be0cd19; +} + +void sha256_transform(struct sha256_state *st, const uint8_t *data) { + uint32_t a, b, c, d, e, f, g, h; + uint32_t s0, s1; + uint32_t w[64]; + size_t i; + + for (i = 0; i < 16; ++i) { + w[i] = (data[i << 2] << 24) | (data[(i << 2) + 1] << 16) | + (data[(i << 2) + 2] << 8) | data[(i << 2) + 3]; + } + for (i = 16; i < 64; ++i) { + s0 = _ror(w[i - 15], 7) ^ _ror(w[i - 15], 18) ^ (w[i - 15] >> 3); + s1 = _ror(w[i - 2], 17) ^ _ror(w[i - 2], 19) ^ (w[i - 2] >> 10); + w[i] = w[i - 16] + s0 + w[i - 7] + s1; + } + + a = st->h[0]; + b = st->h[1]; + c = st->h[2]; + d = st->h[3]; + e = st->h[4]; + f = st->h[5]; + g = st->h[6]; + h = st->h[7]; + + for (i = 0; i < 64; ++i) { + uint32_t s1 = _ror(e, 6) ^ _ror(e, 11) ^ _ror(e, 25); + uint32_t ch = (e & f) ^ ((~e) & g); + uint32_t temp1 = h + s1 + ch + k[i] + w[i]; + uint32_t s0 = _ror(a, 2) ^ _ror(a, 13) ^ _ror(a, 22); + uint32_t maj = (a & b) ^ (a & c) ^ (b & c); + uint32_t temp2 = s0 + maj; + + h = g; + g = f; + f = e; + e = d + temp1; + d = c; + c = b; + b = a; + a = temp1 + temp2; + } + + st->h[0] += a; + st->h[1] += b; + st->h[2] += c; + st->h[3] += d; + st->h[4] += e; + st->h[5] += f; + st->h[6] += g; + st->h[7] += h; +} + +void sha256_update(struct sha256_state *st, const uint8_t *data, size_t len) { + for (size_t i = 0; i < len; ++i) { + st->data[st->len++] = data[i]; + if (st->len == 64) { + sha256_transform(st, st->data); + st->bitlen += 512; + st->len = 0; + } + } +} + +void sha256_final(struct sha256_state *st, uint8_t hash[]) { + size_t i; + + i = st->len; + + // Pad the last chunk + if (st->len < 56) { + st->data[i++] = 0x80; + while (i < 56) { + st->data[i++] = 0x00; + } + } else { + st->data[i++] = 0x80; + while (i < 64) { + st->data[i++] = 0x00; + } + sha256_transform(st, st->data); + memset(st->data, 0, 56); + } + + // Append total message length + st->bitlen += st->len * 8; + st->data[63] = st->bitlen & 0xFF; + st->data[62] = (st->bitlen >> 8) & 0xFF; + st->data[61] = (st->bitlen >> 16) & 0xFF; + st->data[60] = (st->bitlen >> 24) & 0xFF; + st->data[59] = (st->bitlen >> 32) & 0xFF; + st->data[58] = (st->bitlen >> 40) & 0xFF; + st->data[57] = (st->bitlen >> 48) & 0xFF; + st->data[56] = (st->bitlen >> 56) & 0xFF; + sha256_transform(st, st->data); + + // Reverse the bytes for proper endianness + for (i = 0; i < 4; ++i) { + hash[i ] = (st->h[0] >> (24 - i * 8)) & 0xFF; + hash[i + 4] = (st->h[1] >> (24 - i * 8)) & 0xFF; + hash[i + 8] = (st->h[2] >> (24 - i * 8)) & 0xFF; + hash[i + 12] = (st->h[3] >> (24 - i * 8)) & 0xFF; + hash[i + 16] = (st->h[4] >> (24 - i * 8)) & 0xFF; + hash[i + 20] = (st->h[5] >> (24 - i * 8)) & 0xFF; + hash[i + 24] = (st->h[6] >> (24 - i * 8)) & 0xFF; + hash[i + 28] = (st->h[7] >> (24 - i * 8)) & 0xFF; + } +} + +static int do_sha256sum(const char *in) { + struct sha256_state st; + uint8_t hash[32]; + char buf[256]; + size_t bread; + FILE *fp; + + if (!strcmp(in, "-")) { + fp = stdin; + } else { + fp = fopen(in, "rb"); + if (!fp) { + perror(in); + return -1; + } + } + + sha256_init(&st); + + while ((bread = fread(buf, 1, sizeof(buf), fp)) > 0) { + sha256_update(&st, (uint8_t *) buf, bread); + } + + sha256_final(&st, hash); + for (size_t i = 0; i < 32; ++i) { + printf("%02hhx", hash[i]); + } + printf(" %s\n", in); + + return 0; +} + +int main(int argc, char **argv) { + if (argc == 2) { + return do_sha256sum(argv[1]); + } else { + return do_sha256sum("-"); + } + + return 0; +}