diff options
| author | Andy Polyakov <appro@openssl.org> | 2017-11-11 22:15:33 +0100 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2017-11-13 10:58:14 +0100 |
| commit | b4c0e4dff6c84a3cdf464587923eaa0f789168b8 (patch) | |
| tree | 50c086907a976fb4cc65198e9d150c48bc816928 /crypto/evp/pbe_scrypt.c | |
| parent | 372463103917fcc2b68bd2ba3db55b29ce325705 (diff) | |
evp/pbe_scrypt.c: add boundary condition for implicit cast.
Even though |Blen| is declared uint64_t it was casted implicitly to int.
[Caught by VC warning subsytem.]
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4721)
Diffstat (limited to 'crypto/evp/pbe_scrypt.c')
| -rw-r--r-- | crypto/evp/pbe_scrypt.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/crypto/evp/pbe_scrypt.c b/crypto/evp/pbe_scrypt.c index b30e6d5719..fddabc9a32 100644 --- a/crypto/evp/pbe_scrypt.c +++ b/crypto/evp/pbe_scrypt.c @@ -191,6 +191,14 @@ int EVP_PBE_scrypt(const char *pass, size_t passlen, * p * r < SCRYPT_PR_MAX */ Blen = p * 128 * r; + /* + * Yet we pass it as integer to PKCS5_PBKDF2_HMAC... [This would + * have to be revised when/if PKCS5_PBKDF2_HMAC accepts size_t.] + */ + if (Blen > INT_MAX) { + EVPerr(EVP_F_EVP_PBE_SCRYPT, EVP_R_MEMORY_LIMIT_EXCEEDED); + return 0; + } /* * Check 32 * r * (N + 2) * sizeof(uint32_t) fits in uint64_t @@ -221,25 +229,25 @@ int EVP_PBE_scrypt(const char *pass, size_t passlen, if (key == NULL) return 1; - B = OPENSSL_malloc(Blen + Vlen); + B = OPENSSL_malloc((size_t)(Blen + Vlen)); if (B == NULL) return 0; X = (uint32_t *)(B + Blen); T = X + 32 * r; V = T + 32 * r; if (PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, 1, EVP_sha256(), - Blen, B) == 0) + (int)Blen, B) == 0) goto err; for (i = 0; i < p; i++) scryptROMix(B + 128 * r * i, r, N, X, T, V); - if (PKCS5_PBKDF2_HMAC(pass, passlen, B, Blen, 1, EVP_sha256(), + if (PKCS5_PBKDF2_HMAC(pass, passlen, B, (int)Blen, 1, EVP_sha256(), keylen, key) == 0) goto err; rv = 1; err: - OPENSSL_clear_free(B, Blen + Vlen); + OPENSSL_clear_free(B, (size_t)(Blen + Vlen)); return rv; } #endif |