1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Hash shim layer on MbedTLS Crypto library
4 *
5 * Copyright (c) 2024 Linaro Limited
6 * Author: Raymond Mao <raymond.mao@linaro.org>
7 */
8 #ifndef USE_HOSTCC
9 #include <cyclic.h>
10 #endif /* USE_HOSTCC */
11 #include <compiler.h>
12 #include <u-boot/sha512.h>
13
14 const u8 sha384_der_prefix[SHA384_DER_LEN] = {
15 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
16 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05,
17 0x00, 0x04, 0x30
18 };
19
20 const u8 sha512_der_prefix[SHA512_DER_LEN] = {
21 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
22 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05,
23 0x00, 0x04, 0x40
24 };
25
sha384_starts(sha512_context * ctx)26 void sha384_starts(sha512_context *ctx)
27 {
28 mbedtls_sha512_init(ctx);
29 mbedtls_sha512_starts(ctx, 1);
30 }
31
32 void
sha384_update(sha512_context * ctx,const uint8_t * input,uint32_t length)33 sha384_update(sha512_context *ctx, const uint8_t *input, uint32_t length)
34 {
35 mbedtls_sha512_update(ctx, input, length);
36 }
37
sha384_finish(sha512_context * ctx,uint8_t digest[SHA384_SUM_LEN])38 void sha384_finish(sha512_context *ctx, uint8_t digest[SHA384_SUM_LEN])
39 {
40 mbedtls_sha512_finish(ctx, digest);
41 mbedtls_sha512_free(ctx);
42 }
43
sha384_csum_wd(const unsigned char * input,unsigned int length,unsigned char * output,unsigned int chunk_sz)44 void sha384_csum_wd(const unsigned char *input, unsigned int length,
45 unsigned char *output, unsigned int chunk_sz)
46 {
47 mbedtls_sha512(input, length, output, 1);
48 }
49
sha512_starts(sha512_context * ctx)50 void sha512_starts(sha512_context *ctx)
51 {
52 mbedtls_sha512_init(ctx);
53 mbedtls_sha512_starts(ctx, 0);
54 }
55
56 void
sha512_update(sha512_context * ctx,const uint8_t * input,uint32_t length)57 sha512_update(sha512_context *ctx, const uint8_t *input, uint32_t length)
58 {
59 mbedtls_sha512_update(ctx, input, length);
60 }
61
sha512_finish(sha512_context * ctx,uint8_t digest[SHA512_SUM_LEN])62 void sha512_finish(sha512_context *ctx, uint8_t digest[SHA512_SUM_LEN])
63 {
64 mbedtls_sha512_finish(ctx, digest);
65 mbedtls_sha512_free(ctx);
66 }
67
sha512_csum_wd(const unsigned char * input,unsigned int ilen,unsigned char * output,unsigned int chunk_sz)68 void sha512_csum_wd(const unsigned char *input, unsigned int ilen,
69 unsigned char *output, unsigned int chunk_sz)
70 {
71 sha512_context ctx;
72
73 sha512_starts(&ctx);
74
75 if (IS_ENABLED(CONFIG_HW_WATCHDOG) || IS_ENABLED(CONFIG_WATCHDOG)) {
76 const unsigned char *curr = input;
77 const unsigned char *end = input + ilen;
78 int chunk;
79
80 while (curr < end) {
81 chunk = end - curr;
82 if (chunk > chunk_sz)
83 chunk = chunk_sz;
84 sha512_update(&ctx, curr, chunk);
85 curr += chunk;
86 schedule();
87 }
88 } else {
89 sha512_update(&ctx, input, ilen);
90 }
91
92 sha512_finish(&ctx, output);
93 }
94