mirror of
https://github.com/norandom/OpenUltraSAST.git
synced 2026-10-18 12:39:28 +00:00
Marius Ciepluch
0116f9bea6
Harvest 176 isolated vuln-vs-fix functions (109 CVEs, 352 training rows) into benchmarks/pairs/vfc with provenance and a JSONL training manifest. Score the slice as an honesty dashboard (ousast pairs --slice vfc); keep the pair gate on the local fixtures only.
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/* Provenance: openssl/openssl HKDF_Expand (fixed).
|
|
* repo: openssl/openssl
|
|
* commit: d12cde7fc5561d463badcd8a73079cf92864c31e
|
|
* parent: 5d6f13d90d5c4212737002bcd54871cf236a1220
|
|
* commit_url: https://github.com/openssl/openssl/commit/d12cde7fc5561d463badcd8a73079cf92864c31e
|
|
* cve: CVE-2022-37454
|
|
* license: Apache-2.0
|
|
* function: HKDF_Expand
|
|
* relpath: providers/implementations/kdfs/hkdf.c
|
|
*/
|
|
|
|
static int HKDF_Expand(const EVP_MD *evp_md,
|
|
const unsigned char *prk, size_t prk_len,
|
|
const unsigned char *info, size_t info_len,
|
|
unsigned char *okm, size_t okm_len)
|
|
{
|
|
HMAC_CTX *hmac;
|
|
int ret = 0, sz;
|
|
unsigned int i;
|
|
unsigned char prev[EVP_MAX_MD_SIZE];
|
|
size_t done_len = 0, dig_len, n;
|
|
|
|
sz = EVP_MD_get_size(evp_md);
|
|
if (sz <= 0)
|
|
return 0;
|
|
dig_len = (size_t)sz;
|
|
|
|
/* calc: N = ceil(L/HashLen) */
|
|
n = okm_len / dig_len;
|
|
if (okm_len % dig_len)
|
|
n++;
|
|
|
|
if (n > 255 || okm == NULL)
|
|
return 0;
|
|
|
|
if ((hmac = HMAC_CTX_new()) == NULL)
|
|
return 0;
|
|
|
|
if (!HMAC_Init_ex(hmac, prk, prk_len, evp_md, NULL))
|
|
goto err;
|
|
|
|
for (i = 1; i <= n; i++) {
|
|
size_t copy_len;
|
|
const unsigned char ctr = i;
|
|
|
|
/* calc: T(i) = HMAC-Hash(PRK, T(i - 1) | info | i) */
|
|
if (i > 1) {
|
|
if (!HMAC_Init_ex(hmac, NULL, 0, NULL, NULL))
|
|
goto err;
|
|
|
|
if (!HMAC_Update(hmac, prev, dig_len))
|
|
goto err;
|
|
}
|
|
|
|
if (!HMAC_Update(hmac, info, info_len))
|
|
goto err;
|
|
|
|
if (!HMAC_Update(hmac, &ctr, 1))
|
|
goto err;
|
|
|
|
if (!HMAC_Final(hmac, prev, NULL))
|
|
goto err;
|
|
|
|
copy_len = (dig_len > okm_len - done_len) ?
|
|
okm_len - done_len :
|
|
dig_len;
|
|
|
|
memcpy(okm + done_len, prev, copy_len);
|
|
|
|
done_len += copy_len;
|
|
}
|
|
ret = 1;
|
|
|
|
err:
|
|
OPENSSL_cleanse(prev, sizeof(prev));
|
|
HMAC_CTX_free(hmac);
|
|
return ret;
|
|
}
|