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-rw-r--r--chip/g/dcrypto/hmac_drbg.c476
1 files changed, 0 insertions, 476 deletions
diff --git a/chip/g/dcrypto/hmac_drbg.c b/chip/g/dcrypto/hmac_drbg.c
deleted file mode 100644
index 0643c9bf84..0000000000
--- a/chip/g/dcrypto/hmac_drbg.c
+++ /dev/null
@@ -1,476 +0,0 @@
-/* Copyright 2018 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "console.h"
-#include "cryptoc/util.h"
-#include "dcrypto.h"
-#include "extension.h"
-#include "internal.h"
-#include "trng.h"
-
-/* HMAC_DRBG flow in NIST SP 800-90Ar1, 10.2, RFC 6979
- */
-/* V = HMAC(K, V) */
-static void update_v(const uint32_t *k, uint32_t *v)
-{
- LITE_HMAC_CTX ctx;
-
- DCRYPTO_HMAC_SHA256_init(&ctx, k, SHA256_DIGEST_SIZE);
- HASH_update(&ctx.hash, v, SHA256_DIGEST_SIZE);
- memcpy(v, DCRYPTO_HMAC_final(&ctx), SHA256_DIGEST_SIZE);
-}
-
-/* K = HMAC(K, V || tag || p0 || p1 || p2) */
-/* V = HMAC(K, V) */
-static void update_kv(uint32_t *k, uint32_t *v, uint8_t tag,
- const void *p0, size_t p0_len,
- const void *p1, size_t p1_len,
- const void *p2, size_t p2_len)
-{
- LITE_HMAC_CTX ctx;
-
- DCRYPTO_HMAC_SHA256_init(&ctx, k, SHA256_DIGEST_SIZE);
- HASH_update(&ctx.hash, v, SHA256_DIGEST_SIZE);
- HASH_update(&ctx.hash, &tag, 1);
- HASH_update(&ctx.hash, p0, p0_len);
- HASH_update(&ctx.hash, p1, p1_len);
- HASH_update(&ctx.hash, p2, p2_len);
- memcpy(k, DCRYPTO_HMAC_final(&ctx), SHA256_DIGEST_SIZE);
-
- update_v(k, v);
-}
-
-static void update(struct drbg_ctx *ctx,
- const void *p0, size_t p0_len,
- const void *p1, size_t p1_len,
- const void *p2, size_t p2_len)
-{
- /* K = HMAC(K, V || 0x00 || provided_data) */
- /* V = HMAC(K, V) */
- update_kv(ctx->k, ctx->v, 0x00,
- p0, p0_len, p1, p1_len, p2, p2_len);
-
- /* If no provided_data, stop. */
- if (p0_len + p1_len + p2_len == 0)
- return;
-
- /* K = HMAC(K, V || 0x01 || provided_data) */
- /* V = HMAC(K, V) */
- update_kv(ctx->k, ctx->v,
- 0x01,
- p0, p0_len, p1, p1_len, p2, p2_len);
-}
-
-void hmac_drbg_init(struct drbg_ctx *ctx,
- const void *p0, size_t p0_len,
- const void *p1, size_t p1_len,
- const void *p2, size_t p2_len)
-{
- /* K = 0x00 0x00 0x00 ... 0x00 */
- always_memset(ctx->k, 0x00, sizeof(ctx->k));
- /* V = 0x01 0x01 0x01 ... 0x01 */
- always_memset(ctx->v, 0x01, sizeof(ctx->v));
-
- update(ctx, p0, p0_len, p1, p1_len, p2, p2_len);
-
- ctx->reseed_counter = 1;
-}
-
-void hmac_drbg_init_rfc6979(struct drbg_ctx *ctx, const p256_int *key,
- const p256_int *message)
-{
- hmac_drbg_init(ctx,
- key->a, sizeof(key->a),
- message->a, sizeof(message->a),
- NULL, 0);
-}
-
-void hmac_drbg_init_rand(struct drbg_ctx *ctx, size_t nbits)
-{
- int i;
- uint32_t x[(nbits + 31) / 32];
-
- for (i = 0; i < ARRAY_SIZE(x); ++i)
- x[i] = rand();
-
- hmac_drbg_init(ctx, &x, sizeof(x), NULL, 0, NULL, 0);
-}
-
-void hmac_drbg_reseed(struct drbg_ctx *ctx,
- const void *p0, size_t p0_len,
- const void *p1, size_t p1_len,
- const void *p2, size_t p2_len)
-{
- update(ctx, p0, p0_len, p1, p1_len, p2, p2_len);
- ctx->reseed_counter = 1;
-}
-
-int hmac_drbg_generate(struct drbg_ctx *ctx,
- void *out, size_t out_len,
- const void *input, size_t input_len)
-{
- /* TODO(louiscollard): Assert maximum output length? */
-
- if (ctx->reseed_counter >= 10000)
- return 2;
-
- if (input_len)
- update(ctx, input, input_len, NULL, 0, NULL, 0);
-
- while (out_len) {
- size_t n = out_len > sizeof(ctx->v) ? sizeof(ctx->v) : out_len;
-
- update_v(ctx->k, ctx->v);
-
- memcpy(out, ctx->v, n);
- out += n;
- out_len -= n;
- }
-
- update(ctx, input, input_len, NULL, 0, NULL, 0);
- ctx->reseed_counter++;
-
- return 0;
-}
-
-void hmac_drbg_generate_p256(struct drbg_ctx *ctx, p256_int *k_out)
-{
- hmac_drbg_generate(ctx,
- k_out->a, sizeof(k_out->a),
- NULL, 0);
-}
-
-void drbg_exit(struct drbg_ctx *ctx)
-{
- always_memset(ctx->k, 0x00, sizeof(ctx->k));
- always_memset(ctx->v, 0x00, sizeof(ctx->v));
-}
-
-#ifdef CRYPTO_TEST_SETUP
-
-/*
- * from the RFC 6979 A.2.5 example:
- *
- * curve: NIST P-256
- *
- * q = FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551
- * (qlen = 256 bits)
- *
- * private key:
- * x = C9AFA9D845BA75166B5C215767B1D6934E50C3DB36E89B127B8A622B120F6721
- *
- * public key: U = xG
- * Ux = 60FED4BA255A9D31C961EB74C6356D68C049B8923B61FA6CE669622E60F29FB6
- * Uy = 7903FE1008B8BC99A41AE9E95628BC64F2F1B20C2D7E9F5177A3C294D4462299
- *
- * Signature:
- * With SHA-256, message = "sample":
- * k = A6E3C57DD01ABE90086538398355DD4C3B17AA873382B0F24D6129493D8AAD60
- * r = EFD48B2AACB6A8FD1140DD9CD45E81D69D2C877B56AAF991C34D0EA84EAF3716
- * s = F7CB1C942D657C41D436C7A1B6E29F65F3E900DBB9AFF4064DC4AB2F843ACDA8
- */
-static int cmd_rfc6979(int argc, char **argv)
-{
- static p256_int h1;
- static p256_int k;
- static const char message[] = "sample";
- static struct drbg_ctx drbg;
-
- static HASH_CTX ctx;
- int result;
- static const uint8_t priv_from_rfc[] = {
- 0xC9, 0xAF, 0xA9, 0xD8, 0x45, 0xBA, 0x75, 0x16,
- 0x6B, 0x5C, 0x21, 0x57, 0x67, 0xB1, 0xD6, 0x93,
- 0x4E, 0x50, 0xC3, 0xDB, 0x36, 0xE8, 0x9B, 0x12,
- 0x7B, 0x8A, 0x62, 0x2B, 0x12, 0x0F, 0x67, 0x21
- };
- static const uint8_t k_from_rfc[] = {
- 0xA6, 0xE3, 0xC5, 0x7D, 0xD0, 0x1A, 0xBE, 0x90,
- 0x08, 0x65, 0x38, 0x39, 0x83, 0x55, 0xDD, 0x4C,
- 0x3B, 0x17, 0xAA, 0x87, 0x33, 0x82, 0xB0, 0xF2,
- 0x4D, 0x61, 0x29, 0x49, 0x3D, 0x8A, 0xAD, 0x60
- };
- p256_int *x = (p256_int *)priv_from_rfc;
- p256_int *reference_k = (p256_int *)k_from_rfc;
-
- /* h1 = H(m) */
- DCRYPTO_SHA256_init(&ctx, 1);
- HASH_update(&ctx, message, sizeof(message) - 1);
- memcpy(&h1, HASH_final(&ctx), SHA256_DIGEST_SIZE);
-
- hmac_drbg_init_rfc6979(&drbg, x, &h1);
- do {
- hmac_drbg_generate_p256(&drbg, &k);
- ccprintf("K = %ph\n", HEX_BUF(&k, 32));
- } while (p256_cmp(&SECP256r1_nMin2, &k) < 0);
- drbg_exit(&drbg);
- result = p256_cmp(&k, reference_k);
- ccprintf("K generation: %s\n", result ? "FAIL" : "PASS");
-
- return result ? EC_ERROR_INVAL : EC_SUCCESS;
-}
-DECLARE_SAFE_CONSOLE_COMMAND(rfc6979, cmd_rfc6979, NULL, NULL);
-
-/*
- * Test vectors from the NIST Cryptographic Algorithm Validation Program.
- *
- * These are the first two examples from the SHA-256, without prediction
- * resistance, and with reseed supported.
- */
-#define HMAC_TEST_COUNT 2
-static int cmd_hmac_drbg(int argc, char **argv)
-{
- static struct drbg_ctx ctx;
-
- static const uint8_t init_entropy[HMAC_TEST_COUNT][32] = {
- {
- 0x06, 0x03, 0x2C, 0xD5, 0xEE, 0xD3, 0x3F, 0x39, 0x26,
- 0x5F, 0x49, 0xEC, 0xB1, 0x42, 0xC5, 0x11, 0xDA, 0x9A,
- 0xFF, 0x2A, 0xF7, 0x12, 0x03, 0xBF, 0xFA, 0xF3, 0x4A,
- 0x9C, 0xA5, 0xBD, 0x9C, 0x0D
- },
- {
- 0xAA, 0xDC, 0xF3, 0x37, 0x78, 0x8B, 0xB8, 0xAC, 0x01,
- 0x97, 0x66, 0x40, 0x72, 0x6B, 0xC5, 0x16, 0x35, 0xD4,
- 0x17, 0x77, 0x7F, 0xE6, 0x93, 0x9E, 0xDE, 0xD9, 0xCC,
- 0xC8, 0xA3, 0x78, 0xC7, 0x6A
- },
- };
-
- static const uint8_t init_nonce[HMAC_TEST_COUNT][16] = {
- {
- 0x0E, 0x66, 0xF7, 0x1E, 0xDC, 0x43, 0xE4, 0x2A, 0x45,
- 0xAD, 0x3C, 0x6F, 0xC6, 0xCD, 0xC4, 0xDF
- },
- {
- 0x9C, 0xCC, 0x9D, 0x80, 0xC8, 0x9A, 0xC5, 0x5A, 0x8C,
- 0xFE, 0x0F, 0x99, 0x94, 0x2F, 0x5A, 0x4D
- },
- };
-
- static const uint8_t reseed_entropy[HMAC_TEST_COUNT][32] = {
- {
- 0x01, 0x92, 0x0A, 0x4E, 0x66, 0x9E, 0xD3, 0xA8, 0x5A,
- 0xE8, 0xA3, 0x3B, 0x35, 0xA7, 0x4A, 0xD7, 0xFB, 0x2A,
- 0x6B, 0xB4, 0xCF, 0x39, 0x5C, 0xE0, 0x03, 0x34, 0xA9,
- 0xC9, 0xA5, 0xA5, 0xD5, 0x52
- },
- {
- 0x03, 0xA5, 0x77, 0x92, 0x54, 0x7E, 0x0C, 0x98, 0xEA,
- 0x17, 0x76, 0xE4, 0xBA, 0x80, 0xC0, 0x07, 0x34, 0x62,
- 0x96, 0xA5, 0x6A, 0x27, 0x0A, 0x35, 0xFD, 0x9E, 0xA2,
- 0x84, 0x5C, 0x7E, 0x81, 0xE2
- }
- };
-
- static const uint8_t expected_output[HMAC_TEST_COUNT][128] = {
- {
- 0x76, 0xFC, 0x79, 0xFE, 0x9B, 0x50, 0xBE, 0xCC, 0xC9,
- 0x91, 0xA1, 0x1B, 0x56, 0x35, 0x78, 0x3A, 0x83, 0x53,
- 0x6A, 0xDD, 0x03, 0xC1, 0x57, 0xFB, 0x30, 0x64, 0x5E,
- 0x61, 0x1C, 0x28, 0x98, 0xBB, 0x2B, 0x1B, 0xC2, 0x15,
- 0x00, 0x02, 0x09, 0x20, 0x8C, 0xD5, 0x06, 0xCB, 0x28,
- 0xDA, 0x2A, 0x51, 0xBD, 0xB0, 0x38, 0x26, 0xAA, 0xF2,
- 0xBD, 0x23, 0x35, 0xD5, 0x76, 0xD5, 0x19, 0x16, 0x08,
- 0x42, 0xE7, 0x15, 0x8A, 0xD0, 0x94, 0x9D, 0x1A, 0x9E,
- 0xC3, 0xE6, 0x6E, 0xA1, 0xB1, 0xA0, 0x64, 0xB0, 0x05,
- 0xDE, 0x91, 0x4E, 0xAC, 0x2E, 0x9D, 0x4F, 0x2D, 0x72,
- 0xA8, 0x61, 0x6A, 0x80, 0x22, 0x54, 0x22, 0x91, 0x82,
- 0x50, 0xFF, 0x66, 0xA4, 0x1B, 0xD2, 0xF8, 0x64, 0xA6,
- 0xA3, 0x8C, 0xC5, 0xB6, 0x49, 0x9D, 0xC4, 0x3F, 0x7F,
- 0x2B, 0xD0, 0x9E, 0x1E, 0x0F, 0x8F, 0x58, 0x85, 0x93,
- 0x51, 0x24
- },
- {
- 0x17, 0xD0, 0x9F, 0x40, 0xA4, 0x37, 0x71, 0xF4, 0xA2,
- 0xF0, 0xDB, 0x32, 0x7D, 0xF6, 0x37, 0xDE, 0xA9, 0x72,
- 0xBF, 0xFF, 0x30, 0xC9, 0x8E, 0xBC, 0x88, 0x42, 0xDC,
- 0x7A, 0x9E, 0x3D, 0x68, 0x1C, 0x61, 0x90, 0x2F, 0x71,
- 0xBF, 0xFA, 0xF5, 0x09, 0x36, 0x07, 0xFB, 0xFB, 0xA9,
- 0x67, 0x4A, 0x70, 0xD0, 0x48, 0xE5, 0x62, 0xEE, 0x88,
- 0xF0, 0x27, 0xF6, 0x30, 0xA7, 0x85, 0x22, 0xEC, 0x6F,
- 0x70, 0x6B, 0xB4, 0x4A, 0xE1, 0x30, 0xE0, 0x5C, 0x8D,
- 0x7E, 0xAC, 0x66, 0x8B, 0xF6, 0x98, 0x0D, 0x99, 0xB4,
- 0xC0, 0x24, 0x29, 0x46, 0x45, 0x23, 0x99, 0xCB, 0x03,
- 0x2C, 0xC6, 0xF9, 0xFD, 0x96, 0x28, 0x47, 0x09, 0xBD,
- 0x2F, 0xA5, 0x65, 0xB9, 0xEB, 0x9F, 0x20, 0x04, 0xBE,
- 0x6C, 0x9E, 0xA9, 0xFF, 0x91, 0x28, 0xC3, 0xF9, 0x3B,
- 0x60, 0xDC, 0x30, 0xC5, 0xFC, 0x85, 0x87, 0xA1, 0x0D,
- 0xE6, 0x8C
- }
- };
-
- static uint8_t output[128];
-
- int i, cmp_result;
-
- for (i = 0; i < HMAC_TEST_COUNT; i++) {
- hmac_drbg_init(&ctx,
- init_entropy[i], sizeof(init_entropy[i]),
- init_nonce[i], sizeof(init_nonce[i]),
- NULL, 0);
-
- hmac_drbg_reseed(&ctx,
- reseed_entropy[i], sizeof(reseed_entropy[i]),
- NULL, 0,
- NULL, 0);
-
- hmac_drbg_generate(&ctx,
- output, sizeof(output),
- NULL, 0);
-
- hmac_drbg_generate(&ctx,
- output, sizeof(output),
- NULL, 0);
-
- cmp_result = memcmp(output, expected_output[i], sizeof(output));
- ccprintf("HMAC DRBG generate test %d, %s\n",
- i, cmp_result ? "failed" : "passed");
- }
-
- return 0;
-}
-DECLARE_SAFE_CONSOLE_COMMAND(hmac_drbg, cmd_hmac_drbg, NULL, NULL);
-
-/*
- * Sanity check to exercise random initialization.
- */
-static int cmd_hmac_drbg_rand(int argc, char **argv)
-{
- static struct drbg_ctx ctx;
- static uint8_t output[128];
-
- int i;
-
- hmac_drbg_init_rand(&ctx, 256);
-
- hmac_drbg_generate(&ctx, output, sizeof(output), NULL, 0);
-
- ccprintf("Randomly initialized HMAC DRBG, 1024 bit output: ");
-
- for (i = 0; i < sizeof(output); i++)
- ccprintf("%x", output[i]);
- ccprintf("\n");
-
- return 0;
-}
-DECLARE_SAFE_CONSOLE_COMMAND(hmac_drbg_rand, cmd_hmac_drbg_rand, NULL, NULL);
-
-enum drbg_command {
- DRBG_INIT = 0,
- DRBG_RESEED = 1,
- DRBG_GENERATE = 2
-};
-
-/*
- * DRBG_TEST command structure:
- *
- * field | size | note
- * ==========================================================================
- * mode | 1 | 0 - DRBG_INIT, 1 - DRBG_RESEED, 2 - DRBG_GENERATE
- * p0_len | 2 | size of first input in bytes
- * p0 | p0_len | entropy for INIT & SEED, input for GENERATE
- * p1_len | 2 | size of second input in bytes (for INIT & RESEED)
- * | | or size of expected output for GENERATE
- * p1 | p1_len | nonce for INIT & SEED
- * p2_len | 2 | size of third input in bytes for DRBG_INIT
- * p2 | p2_len | personalization for INIT & SEED
- *
- * DRBG_INIT (entropy, nonce, perso)
- * DRBG_RESEED (entropy, additional input 1, additional input 2)
- * DRBG_INIT and DRBG_RESEED returns empty response
- * DRBG_GENERATE (p0_len, p0 - additional input 1, p1_len - size of output)
- * DRBG_GENERATE returns p1_len bytes of generated data
- * (up to a maximum of 128 bytes)
- */
-static enum vendor_cmd_rc drbg_test(enum vendor_cmd_cc code, void *buf,
- size_t input_size, size_t *response_size)
-{
- static struct drbg_ctx drbg_ctx;
- static uint8_t output[128];
- uint8_t *p0 = NULL, *p1 = NULL, *p2 = NULL;
- uint16_t p0_len = 0, p1_len = 0, p2_len = 0;
- uint8_t *cmd = (uint8_t *)buf;
- size_t max_out_len = *response_size;
- enum drbg_command drbg_op;
-
- *response_size = 0;
- /* there is always op + first parameter, even if zero length */
- if (input_size < sizeof(p0_len) + 1)
- return VENDOR_RC_BOGUS_ARGS;
- drbg_op = *cmd++;
- p0_len = *cmd++;
- p0_len = p0_len * 256 + *cmd++;
- input_size -= 3;
- if (p0_len > input_size)
- return VENDOR_RC_BOGUS_ARGS;
- input_size -= p0_len;
- if (p0_len)
- p0 = cmd;
- cmd += p0_len;
-
- /* there should be enough space for p1_len */
- if (input_size && input_size < sizeof(p1_len))
- return VENDOR_RC_BOGUS_ARGS;
-
- /* DRBG_GENERATE should just have p1_len defined */
- if (drbg_op == DRBG_GENERATE && input_size != sizeof(p1_len))
- return VENDOR_RC_BOGUS_ARGS;
-
- if (input_size) {
- p1_len = *cmd++;
- p1_len = p1_len * 256 + *cmd++;
- input_size -= 2;
-
- if (drbg_op != DRBG_GENERATE) {
- if (p1_len > input_size)
- return VENDOR_RC_BOGUS_ARGS;
- input_size -= p1_len;
- if (p1_len)
- p1 = cmd;
- cmd += p1_len;
- }
- }
-
- if (input_size) {
- if (drbg_op == DRBG_GENERATE)
- return VENDOR_RC_BOGUS_ARGS;
- p2_len = *cmd++;
- p2_len = p2_len * 256 + *cmd++;
- input_size -= 2;
- if (p2_len > input_size)
- return VENDOR_RC_BOGUS_ARGS;
- if (p2_len)
- p2 = cmd;
- }
-
- switch (drbg_op) {
- case DRBG_INIT: {
- hmac_drbg_init(&drbg_ctx, p0, p0_len, p1, p1_len, p2, p2_len);
- break;
- }
- case DRBG_RESEED: {
- hmac_drbg_reseed(&drbg_ctx, p0, p0_len, p1, p1_len, p2, p2_len);
- break;
- }
- case DRBG_GENERATE: {
- if (p1_len > sizeof(output) || max_out_len < p1_len)
- return VENDOR_RC_BOGUS_ARGS;
-
- hmac_drbg_generate(&drbg_ctx, output, p1_len, p0, p0_len);
-
- memcpy(buf, output, p1_len);
- *response_size = p1_len;
- break;
- }
- default:
- return VENDOR_RC_BOGUS_ARGS;
- }
-
- return VENDOR_RC_SUCCESS;
-}
-DECLARE_VENDOR_COMMAND(VENDOR_CC_DRBG_TEST, drbg_test);
-
-#endif /* CRYPTO_TEST_SETUP */
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