💾 Archived View for gmi.noulin.net › gitRepositories › sha256 › file › sha256.c.gmi captured on 2023-07-10 at 18:01:30. Gemini links have been rewritten to link to archived content
⬅️ Previous capture (2023-01-29)
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sha256.c (757B)
1 /*
2 * Author: Remy Noulin
3 * License: MIT
4 */
5
6 #include "bconSha256.h"
7 #include "sha256.h"
8 #include "stdlib.h"
9 #include "string.h"
10
11 char *sha256S(const char *bufferToHash);
12 char *sha256_byteToHexString(BYTE data[]);
13
14 char *sha256S(const char *bufferToHash) {
15 if (!bufferToHash) return NULL;
16
17 SHA256_CTX ctx;
18 sha256_init(&ctx);
19 sha256_update(&ctx, bufferToHash, strlen(bufferToHash));
20 BYTE result[32];
21 sha256_final(&ctx, result);
22
23 char *hexS = sha256_byteToHexString(result);
24 return hexS;
25 }
26
27 char *sha256_byteToHexString(BYTE data[]) {
28 char *hexC = "0123456789abcdef";
29 char *hexS = malloc(65);
30 if (!hexS) return NULL;
31 for(BYTE i; i<32; i++) {
32 hexS[i*2] = hexC[data[i]>>4];
33 hexS[i*2+1] = hexC[data[i]&0xF];
34 }
35 hexS[64] = 0;
36 return hexS;
37 }