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/* 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.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, 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: $Format:%ai$ */
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