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Fix: missing free

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This commit is contained in:
Dorian Zedler 2022-07-12 16:02:30 +02:00
parent 1e1f4450e8
commit d35d338fb1
Signed by: dorian
GPG key ID: 989DE36109AFA354
1 changed files with 9 additions and 11 deletions
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20
Implementierung/src/md2_impls/md2_2.c
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@ -27,13 +27,8 @@ void process_block_checksum(uint8_t block[16], uint8_t checksum[16],
}
}
void md2_checksum_2(size_t len, uint8_t* buf) {
uint8_t l = 0;
for (size_t i = 0; i < len / 16; i++) {
process_block_checksum(buf + (i * 16), buf + len, &l);
}
}
// unused!
void md2_checksum_2(size_t, uint8_t*) {}
void md2_hash_2(size_t len, const uint8_t buf[len], uint8_t out[16]) {
// === step 1 ===
@ -44,7 +39,7 @@ void md2_hash_2(size_t len, const uint8_t buf[len], uint8_t out[16]) {
// printf("len: %d\n", len);
// +16 for the checksum
uint8_t* newBuf = calloc(len + 16, sizeof(uint8_t));
uint8_t* newBuf = calloc(len, sizeof(uint8_t));
// TODO: null check
memcpy(newBuf, buf, len - paddingNeeded);
@ -62,15 +57,18 @@ void md2_hash_2(size_t len, const uint8_t buf[len], uint8_t out[16]) {
// === step 4 ===
uint8_t l = 0;
// <= because we need to hash the last block too
uint8_t* checksum = calloc(16, sizeof(uint8_t));
for (size_t i = 0; i < len / 16; i++) {
process_block_checksum(newBuf + (i * 16), newBuf + len, &l);
process_block_checksum(newBuf + (i * 16), checksum, &l);
process_block_hash(newBuf + (i * 16), messageDigestBuf);
}
process_block_hash(newBuf + len, messageDigestBuf);
process_block_hash(checksum, messageDigestBuf);
memcpy(out, messageDigestBuf, 16);
free(newBuf);
free(messageDigestBuf);
free(checksum);
}