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Change to b64 output for hmac

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base64 utility is not always available, so natively
use base64 format for hmac output.
This commit is contained in:
Jarrod Johnson 2022-03-10 09:00:54 -05:00
parent 61d037ae31
commit b42e2e4932
1 changed files with 33 additions and 2 deletions
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35
confluent_osdeploy/utils/clortho.c
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@ -18,7 +18,7 @@
#define MAXPACKET 1024
static const char cryptalpha[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./";
static const char cryptalpha[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
unsigned char* genpasswd(int len) {
unsigned char * passwd;
@ -39,6 +39,34 @@ unsigned char* genpasswd(int len) {
}
char * b64e(uint8_t * data, uint32_t datalen) {
uint8_t * currptr;
uint8_t * currout;
uint8_t currchunk[4];
uint8_t * retval;
uint32_t neededlen;
int32_t remaining = datalen;
neededlen = (datalen - 1) / 3 * 4 + 4;
retval = malloc(neededlen + 1);
currout = retval;
currptr = data;
currchunk[3] = 0;
while (remaining > 0) {
currchunk[0] = currptr[0];
currchunk[1] = remaining > 1 ? currptr[1] : 0;
currchunk[2] = remaining > 2 ? currptr[2] : 0;
currptr += 3;
currout[0] = cryptalpha[currchunk[0] >> 2];
currout[1] = cryptalpha[(currchunk[0] << 4 | currchunk[1] >> 4) & 0x3f];
currout[2] = remaining > 1 ? cryptalpha[(currchunk[1] << 2 | currchunk[2] >> 6) & 0x3f] : '=';
currout[3] = remaining > 2 ? cryptalpha[currchunk[2] & 0x3f] : '=';
remaining -= 3;
currout += 4;
}
retval[neededlen] = 0;
return retval;
}
int getpasshmac(int argc, char* argv[]) {
FILE *outfile;
uint8_t *passwd;
@ -46,6 +74,7 @@ int getpasshmac(int argc, char* argv[]) {
uint8_t *tmps;
uint8_t *cryptpass;
uint8_t hmac[32];
uint8_t *hmac64;
uint8_t hmackey[64];
int hmackeysize;
if (argc < 5) {
@ -69,9 +98,11 @@ int getpasshmac(int argc, char* argv[]) {
fwrite(cryptpass, 1, strlen(cryptpass), outfile);
fclose(outfile);
hmac_sha256(hmac, cryptpass, strlen(cryptpass), hmackey, hmackeysize);
hmac64 = b64e(hmac);
outfile = fopen(argv[3], "w");
fwrite(hmac, 1, 32, outfile);
fwrite(hmac64, 1, strlen(hmac64), outfile);
fclose(outfile);
free(hmac64);
free(passwd);
free(buffer);
}