aboutsummaryrefslogtreecommitdiff
path: root/src/sha256.c
diff options
context:
space:
mode:
authorEliseo Martínez <eliseomarmol@gmail.com>2014-05-12 02:25:17 +0200
committerEliseo Martínez <eliseomarmol@gmail.com>2014-05-15 20:46:01 +0200
commitda51dc9cf202772f60bd2da975dbef257bd9237c (patch)
tree5c16b93238a153f55634e9323077f30c8133970c /src/sha256.c
parentffe61e5ba1721340ca51d56bae3ddaca415fb5bc (diff)
downloadrneovim-da51dc9cf202772f60bd2da975dbef257bd9237c.tar.gz
rneovim-da51dc9cf202772f60bd2da975dbef257bd9237c.tar.bz2
rneovim-da51dc9cf202772f60bd2da975dbef257bd9237c.zip
Introduce nvim namespace: Move files.
Move files from src/ to src/nvim/. - src/nvim/ becomes the new root dir for nvim executable sources. - src/libnvim/ is planned to become root dir of the neovim library.
Diffstat (limited to 'src/sha256.c')
-rw-r--r--src/sha256.c418
1 files changed, 0 insertions, 418 deletions
diff --git a/src/sha256.c b/src/sha256.c
deleted file mode 100644
index 0ccb13d763..0000000000
--- a/src/sha256.c
+++ /dev/null
@@ -1,418 +0,0 @@
-/// @file sha256.c
-///
-/// FIPS-180-2 compliant SHA-256 implementation
-/// GPL by Christophe Devine, applies to older version.
-/// Modified for md5deep, in public domain.
-/// Modified For Vim, Mohsin Ahmed, http://www.cs.albany.edu/~mosh
-/// Mohsin Ahmed states this work is distributed under the VIM License or GPL,
-/// at your choice.
-///
-/// Vim specific notes:
-/// Functions exported by this file:
-/// 1. sha256_key() hashes the password to 64 bytes char string.
-/// 2. sha2_seed() generates a random header.
-/// sha256_self_test() is implicitly called once.
-
-#include <string.h>
-
-#include "vim.h"
-#include "sha256.h"
-
-static void sha256_process(context_sha256_T *ctx, char_u data[64]);
-
-#define GET_UINT32(n, b, i) { \
- (n) = ((uint32_t)(b)[(i)] << 24) \
- | ((uint32_t)(b)[(i) + 1] << 16) \
- | ((uint32_t)(b)[(i) + 2] << 8) \
- | ((uint32_t)(b)[(i) + 3]); \
-}
-
-#define PUT_UINT32(n, b, i) { \
- (b)[(i)] = (char_u)((n) >> 24); \
- (b)[(i) + 1] = (char_u)((n) >> 16); \
- (b)[(i) + 2] = (char_u)((n) >> 8); \
- (b)[(i) + 3] = (char_u)((n)); \
-}
-
-void sha256_start(context_sha256_T *ctx)
-{
- ctx->total[0] = 0;
- ctx->total[1] = 0;
-
- ctx->state[0] = 0x6A09E667;
- ctx->state[1] = 0xBB67AE85;
- ctx->state[2] = 0x3C6EF372;
- ctx->state[3] = 0xA54FF53A;
- ctx->state[4] = 0x510E527F;
- ctx->state[5] = 0x9B05688C;
- ctx->state[6] = 0x1F83D9AB;
- ctx->state[7] = 0x5BE0CD19;
-}
-
-static void sha256_process(context_sha256_T *ctx, char_u data[64])
-{
- uint32_t temp1, temp2, W[64];
- uint32_t A, B, C, D, E, F, G, H;
-
- GET_UINT32(W[0], data, 0);
- GET_UINT32(W[1], data, 4);
- GET_UINT32(W[2], data, 8);
- GET_UINT32(W[3], data, 12);
- GET_UINT32(W[4], data, 16);
- GET_UINT32(W[5], data, 20);
- GET_UINT32(W[6], data, 24);
- GET_UINT32(W[7], data, 28);
- GET_UINT32(W[8], data, 32);
- GET_UINT32(W[9], data, 36);
- GET_UINT32(W[10], data, 40);
- GET_UINT32(W[11], data, 44);
- GET_UINT32(W[12], data, 48);
- GET_UINT32(W[13], data, 52);
- GET_UINT32(W[14], data, 56);
- GET_UINT32(W[15], data, 60);
-
-#define SHR(x, n) ((x & 0xFFFFFFFF) >> n)
-#define ROTR(x, n) (SHR(x, n) | (x << (32 - n)))
-
-#define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
-#define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
-
-#define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
-#define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
-
-#define F0(x, y, z) ((x & y) | (z & (x | y)))
-#define F1(x, y, z) (z ^ (x & (y ^ z)))
-
-#define R(t) \
- (W[t] = S1(W[t - 2]) + W[t - 7] + \
- S0(W[t - 15]) + W[t - 16])
-
-#define P(a, b, c, d, e, f, g, h, x, K) { \
- temp1 = h + S3(e) + F1(e, f, g) + K + x; \
- temp2 = S2(a) + F0(a, b, c); \
- d += temp1; h = temp1 + temp2; \
-}
-
- A = ctx->state[0];
- B = ctx->state[1];
- C = ctx->state[2];
- D = ctx->state[3];
- E = ctx->state[4];
- F = ctx->state[5];
- G = ctx->state[6];
- H = ctx->state[7];
-
- P(A, B, C, D, E, F, G, H, W[0], 0x428A2F98);
- P(H, A, B, C, D, E, F, G, W[1], 0x71374491);
- P(G, H, A, B, C, D, E, F, W[2], 0xB5C0FBCF);
- P(F, G, H, A, B, C, D, E, W[3], 0xE9B5DBA5);
- P(E, F, G, H, A, B, C, D, W[4], 0x3956C25B);
- P(D, E, F, G, H, A, B, C, W[5], 0x59F111F1);
- P(C, D, E, F, G, H, A, B, W[6], 0x923F82A4);
- P(B, C, D, E, F, G, H, A, W[7], 0xAB1C5ED5);
- P(A, B, C, D, E, F, G, H, W[8], 0xD807AA98);
- P(H, A, B, C, D, E, F, G, W[9], 0x12835B01);
- P(G, H, A, B, C, D, E, F, W[10], 0x243185BE);
- P(F, G, H, A, B, C, D, E, W[11], 0x550C7DC3);
- P(E, F, G, H, A, B, C, D, W[12], 0x72BE5D74);
- P(D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE);
- P(C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7);
- P(B, C, D, E, F, G, H, A, W[15], 0xC19BF174);
- P(A, B, C, D, E, F, G, H, R(16), 0xE49B69C1);
- P(H, A, B, C, D, E, F, G, R(17), 0xEFBE4786);
- P(G, H, A, B, C, D, E, F, R(18), 0x0FC19DC6);
- P(F, G, H, A, B, C, D, E, R(19), 0x240CA1CC);
- P(E, F, G, H, A, B, C, D, R(20), 0x2DE92C6F);
- P(D, E, F, G, H, A, B, C, R(21), 0x4A7484AA);
- P(C, D, E, F, G, H, A, B, R(22), 0x5CB0A9DC);
- P(B, C, D, E, F, G, H, A, R(23), 0x76F988DA);
- P(A, B, C, D, E, F, G, H, R(24), 0x983E5152);
- P(H, A, B, C, D, E, F, G, R(25), 0xA831C66D);
- P(G, H, A, B, C, D, E, F, R(26), 0xB00327C8);
- P(F, G, H, A, B, C, D, E, R(27), 0xBF597FC7);
- P(E, F, G, H, A, B, C, D, R(28), 0xC6E00BF3);
- P(D, E, F, G, H, A, B, C, R(29), 0xD5A79147);
- P(C, D, E, F, G, H, A, B, R(30), 0x06CA6351);
- P(B, C, D, E, F, G, H, A, R(31), 0x14292967);
- P(A, B, C, D, E, F, G, H, R(32), 0x27B70A85);
- P(H, A, B, C, D, E, F, G, R(33), 0x2E1B2138);
- P(G, H, A, B, C, D, E, F, R(34), 0x4D2C6DFC);
- P(F, G, H, A, B, C, D, E, R(35), 0x53380D13);
- P(E, F, G, H, A, B, C, D, R(36), 0x650A7354);
- P(D, E, F, G, H, A, B, C, R(37), 0x766A0ABB);
- P(C, D, E, F, G, H, A, B, R(38), 0x81C2C92E);
- P(B, C, D, E, F, G, H, A, R(39), 0x92722C85);
- P(A, B, C, D, E, F, G, H, R(40), 0xA2BFE8A1);
- P(H, A, B, C, D, E, F, G, R(41), 0xA81A664B);
- P(G, H, A, B, C, D, E, F, R(42), 0xC24B8B70);
- P(F, G, H, A, B, C, D, E, R(43), 0xC76C51A3);
- P(E, F, G, H, A, B, C, D, R(44), 0xD192E819);
- P(D, E, F, G, H, A, B, C, R(45), 0xD6990624);
- P(C, D, E, F, G, H, A, B, R(46), 0xF40E3585);
- P(B, C, D, E, F, G, H, A, R(47), 0x106AA070);
- P(A, B, C, D, E, F, G, H, R(48), 0x19A4C116);
- P(H, A, B, C, D, E, F, G, R(49), 0x1E376C08);
- P(G, H, A, B, C, D, E, F, R(50), 0x2748774C);
- P(F, G, H, A, B, C, D, E, R(51), 0x34B0BCB5);
- P(E, F, G, H, A, B, C, D, R(52), 0x391C0CB3);
- P(D, E, F, G, H, A, B, C, R(53), 0x4ED8AA4A);
- P(C, D, E, F, G, H, A, B, R(54), 0x5B9CCA4F);
- P(B, C, D, E, F, G, H, A, R(55), 0x682E6FF3);
- P(A, B, C, D, E, F, G, H, R(56), 0x748F82EE);
- P(H, A, B, C, D, E, F, G, R(57), 0x78A5636F);
- P(G, H, A, B, C, D, E, F, R(58), 0x84C87814);
- P(F, G, H, A, B, C, D, E, R(59), 0x8CC70208);
- P(E, F, G, H, A, B, C, D, R(60), 0x90BEFFFA);
- P(D, E, F, G, H, A, B, C, R(61), 0xA4506CEB);
- P(C, D, E, F, G, H, A, B, R(62), 0xBEF9A3F7);
- P(B, C, D, E, F, G, H, A, R(63), 0xC67178F2);
-
- ctx->state[0] += A;
- ctx->state[1] += B;
- ctx->state[2] += C;
- ctx->state[3] += D;
- ctx->state[4] += E;
- ctx->state[5] += F;
- ctx->state[6] += G;
- ctx->state[7] += H;
-}
-
-void sha256_update(context_sha256_T *ctx, char_u *input, uint32_t length)
-{
- uint32_t left, fill;
-
- if (length == 0) {
- return;
- }
-
- left = ctx->total[0] & 0x3F;
- fill = 64 - left;
-
- ctx->total[0] += length;
- ctx->total[0] &= 0xFFFFFFFF;
-
- if (ctx->total[0] < length) {
- ctx->total[1]++;
- }
-
- if (left && (length >= fill)) {
- memcpy((void *)(ctx->buffer + left), (void *)input, fill);
- sha256_process(ctx, ctx->buffer);
- length -= fill;
- input += fill;
- left = 0;
- }
-
- while (length >= 64) {
- sha256_process(ctx, input);
- length -= 64;
- input += 64;
- }
-
- if (length) {
- memcpy((void *)(ctx->buffer + left), (void *)input, length);
- }
-}
-
-static char_u sha256_padding[64] = {
- 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-void sha256_finish(context_sha256_T *ctx, char_u digest[32])
-{
- uint32_t last, padn;
- uint32_t high, low;
- char_u msglen[8];
-
- high = (ctx->total[0] >> 29) | (ctx->total[1] << 3);
- low = (ctx->total[0] << 3);
-
- PUT_UINT32(high, msglen, 0);
- PUT_UINT32(low, msglen, 4);
-
- last = ctx->total[0] & 0x3F;
- padn = (last < 56) ? (56 - last) : (120 - last);
-
- sha256_update(ctx, sha256_padding, padn);
- sha256_update(ctx, msglen, 8);
-
- PUT_UINT32(ctx->state[0], digest, 0);
- PUT_UINT32(ctx->state[1], digest, 4);
- PUT_UINT32(ctx->state[2], digest, 8);
- PUT_UINT32(ctx->state[3], digest, 12);
- PUT_UINT32(ctx->state[4], digest, 16);
- PUT_UINT32(ctx->state[5], digest, 20);
- PUT_UINT32(ctx->state[6], digest, 24);
- PUT_UINT32(ctx->state[7], digest, 28);
-}
-
-static unsigned int get_some_time(void);
-
-/// Gets the hex digest of the buffer.
-///
-/// @param buf
-/// @param buf_len
-/// @param salt
-/// @param salt_len
-///
-/// @returns hex digest of "buf[buf_len]" in a static array.
-/// if "salt" is not NULL also do "salt[salt_len]".
-char_u *sha256_bytes(char_u *buf, int buf_len, char_u *salt, int salt_len)
-{
- char_u sha256sum[32];
- static char_u hexit[65];
- int j;
- context_sha256_T ctx;
-
- sha256_self_test();
-
- sha256_start(&ctx);
- sha256_update(&ctx, buf, buf_len);
-
- if (salt != NULL) {
- sha256_update(&ctx, salt, salt_len);
- }
- sha256_finish(&ctx, sha256sum);
-
- for (j = 0; j < 32; j++) {
- sprintf((char *) hexit + j * 2, "%02x", sha256sum[j]);
- }
- hexit[sizeof(hexit) - 1] = '\0';
- return hexit;
-}
-
-/// Gets sha256(buf) as 64 hex characters in a static array.
-///
-/// @param buf
-/// @param salt
-/// @param salt_len
-///
-/// @returns sha256(buf) as 64 hex chars in static array.
-char_u* sha256_key(char_u *buf, char_u *salt, int salt_len)
-{
- // No passwd means don't encrypt
- if ((buf == NULL) || (*buf == NUL)) {
- return (char_u *)"";
- }
-
- return sha256_bytes(buf, (int)STRLEN(buf), salt, salt_len);
-}
-
-// These are the standard FIPS-180-2 test vectors
-static char *sha_self_test_msg[] = {
- "abc",
- "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
- NULL
-};
-
-static char *sha_self_test_vector[] = {
- "ba7816bf8f01cfea414140de5dae2223" \
- "b00361a396177a9cb410ff61f20015ad",
- "248d6a61d20638b8e5c026930c3e6039" \
- "a33ce45964ff2167f6ecedd419db06c1",
- "cdc76e5c9914fb9281a1c7e284d73e67" \
- "f1809a48a497200e046d39ccc7112cd0"
-};
-
-/// Perform a test on the SHA256 algorithm.
-///
-/// @return FAIL or OK.
-int sha256_self_test(void)
-{
- int i, j;
- char output[65];
- context_sha256_T ctx;
- char_u buf[1000];
- char_u sha256sum[32];
- static int failures = 0;
- char_u *hexit;
- static int sha256_self_tested = 0;
-
- if (sha256_self_tested > 0) {
- return failures > 0 ? FAIL : OK;
- }
- sha256_self_tested = 1;
-
- for (i = 0; i < 3; i++) {
- if (i < 2) {
- hexit = sha256_bytes((char_u *) sha_self_test_msg[i],
- (int) STRLEN(sha_self_test_msg[i]),
- NULL, 0);
- STRCPY(output, hexit);
- } else {
- sha256_start(&ctx);
- memset(buf, 'a', 1000);
-
- for (j = 0; j < 1000; j++) {
- sha256_update(&ctx, (char_u *) buf, 1000);
- }
- sha256_finish(&ctx, sha256sum);
-
- for (j = 0; j < 32; j++) {
- sprintf(output + j * 2, "%02x", sha256sum[j]);
- }
- }
-
- if (memcmp(output, sha_self_test_vector[i], 64)) {
- failures++;
- output[sizeof(output) - 1] = '\0';
-
- // printf("sha256_self_test %d failed %s\n", i, output);
- }
- }
- return failures > 0 ? FAIL : OK;
-}
-
-static unsigned int get_some_time(void)
-{
-#ifdef HAVE_GETTIMEOFDAY
- struct timeval tv;
-
- // Using usec makes it less predictable.
- gettimeofday(&tv, NULL);
- return (unsigned int) (tv.tv_sec + tv.tv_usec);
-
-#else // ifdef HAVE_GETTIMEOFDAY
- return (unsigned int) time(NULL);
-
-#endif // ifdef HAVE_GETTIMEOFDAY
-}
-
-/// Fill "header[header_len]" with random_data.
-/// Also "salt[salt_len]" when "salt" is not NULL.
-///
-/// @param header
-/// @param header_len
-/// @param salt
-/// @param salt_len
-void sha2_seed(char_u *header, int header_len, char_u *salt, int salt_len)
-{
- static char_u random_data[1000];
- char_u sha256sum[32];
- context_sha256_T ctx;
-
- srand(get_some_time());
-
- int i;
- for (i = 0; i < (int) sizeof(random_data) - 1; i++) {
- random_data[i] = (char_u) ((get_some_time() ^ rand()) & 0xff);
- }
- sha256_start(&ctx);
- sha256_update(&ctx, (char_u *) random_data, sizeof(random_data));
- sha256_finish(&ctx, sha256sum);
-
- // put first block into header.
- for (i = 0; i < header_len; i++) {
- header[i] = sha256sum[i % sizeof(sha256sum)];
- }
-
- // put remaining block into salt.
- if (salt != NULL) {
- for (i = 0; i < salt_len; i++) {
- salt[i] = sha256sum[(i + header_len) % sizeof(sha256sum)];
- }
- }
-}