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Implement PBKDF2 with NSS.

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This was a gap that we left in the last commit.
This commit is contained in:
Nick Mathewson 2018-08-12 17:46:53 -04:00
parent 6a88d8f6b4
commit 96f8e19802
1 changed files with 44 additions and 3 deletions
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47
src/lib/crypt_ops/crypto_s2k.c
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@ -20,10 +20,14 @@
#include "lib/crypt_ops/crypto_util.h"
#include "lib/ctime/di_ops.h"
#include "lib/log/util_bug.h"
#include "lib/intmath/cmp.h"
#ifdef ENABLE_OPENSSL
#include <openssl/evp.h>
#endif
#ifdef ENABLE_NSS
#include <pk11pub.h>
#endif
#if defined(HAVE_LIBSCRYPT_H) && defined(HAVE_LIBSCRYPT_SCRYPT)
#define HAVE_SCRYPT
@ -267,13 +271,13 @@ secret_to_key_compute_key(uint8_t *key_out, size_t key_out_len,
return (int)key_out_len;
case S2K_TYPE_PBKDF2: {
#ifdef ENABLE_OPENSSL
uint8_t log_iters;
if (spec_len < 1 || secret_len > INT_MAX || spec_len > INT_MAX)
return S2K_BAD_LEN;
log_iters = spec[spec_len-1];
if (log_iters > 31)
return S2K_BAD_PARAMS;
#ifdef ENABLE_OPENSSL
rv = PKCS5_PBKDF2_HMAC_SHA1(secret, (int)secret_len,
spec, (int)spec_len-1,
(1<<log_iters),
@ -282,8 +286,45 @@ secret_to_key_compute_key(uint8_t *key_out, size_t key_out_len,
return S2K_FAILED;
return (int)key_out_len;
#else
// XXXXXXXXXXXXXXXXXXXXXXXX implement me.
return S2K_NO_SCRYPT_SUPPORT;
SECItem passItem = { .type = siBuffer,
.data = (unsigned char *) secret,
.len = (int)secret_len };
SECItem saltItem = { .type = siBuffer,
.data = (unsigned char *) spec,
.len = (int)spec_len - 1 };
SECAlgorithmID *alg = NULL;
PK11SymKey *key = NULL;
rv = S2K_FAILED;
alg = PK11_CreatePBEV2AlgorithmID(
SEC_OID_PKCS5_PBKDF2, SEC_OID_HMAC_SHA1, SEC_OID_HMAC_SHA1,
(int)key_out_len, (1<<log_iters), &saltItem);
if (alg == NULL)
return S2K_FAILED;
key = PK11_PBEKeyGen(NULL /* slot */,
alg,
&passItem,
false,
NULL);
SECStatus st = PK11_ExtractKeyValue(key);
if (st != SECSuccess)
goto nss_pbkdf_err;
const SECItem *iptr = PK11_GetKeyData(key);
if (iptr == NULL)
goto nss_pbkdf_err;
rv = MIN((int)iptr->len, (int)key_out_len);
memcpy(key_out, iptr->data, rv);
nss_pbkdf_err:
if (key)
PK11_FreeSymKey(key);
if (alg)
SECOID_DestroyAlgorithmID(alg, PR_TRUE);
return rv;
#endif
}