| // SPDX-License-Identifier: BSD-2-Clause |
| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| */ |
| #include "tomcrypt_private.h" |
| |
| /** |
| @file rsa_sign_saltlen_get.c |
| Retrieve the maximum size of the salt, Steffen Jaeckel. |
| */ |
| |
| #ifdef LTC_MRSA |
| |
| /** |
| Retrieve the maximum possible size of the salt when creating a PKCS#1 PSS signature. |
| @param padding Type of padding (LTC_PKCS_1_PSS only) |
| @param hash_idx The index of the desired hash |
| @param key The RSA key |
| @return The maximum salt length in bytes or INT_MAX on error. |
| */ |
| int rsa_sign_saltlen_get_max_ex(int padding, int hash_idx, const rsa_key *key) |
| { |
| int ret = INT_MAX; |
| LTC_ARGCHK(key != NULL); |
| |
| if ((hash_is_valid(hash_idx) == CRYPT_OK) && |
| (padding == LTC_PKCS_1_PSS)) |
| { |
| ret = rsa_get_size(key); |
| if (ret < INT_MAX) |
| { |
| ret -= (hash_descriptor[hash_idx]->hashsize + 2); |
| } /* if */ |
| } /* if */ |
| |
| return ret; |
| } |
| |
| #endif |
| |
| /* ref: $Format:%D$ */ |
| /* git commit: $Format:%H$ */ |
| /* commit time: $Format:%ai$ */ |