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signature-params: Provide option for maximum RSA/PSS salt length

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However, the length now has to be resolved early, so we don't operate on
the negative constant values e.g. when generating the encoding.
This commit is contained in:
Tobias Brunner
2018-10-26 09:03:26 +02:00
parent dd4bd21c5a
commit ecfe67550d
15 changed files with 119 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/libstrongswan/plugins/openssl/openssl_rsa_private_key.c
+1 -6
View File
@@ -103,13 +103,8 @@ static bool build_signature(private_openssl_rsa_private_key_t *this,
if (pss)
{
const EVP_MD *mgf1md = openssl_get_md(pss->mgf1_hash);
int slen = EVP_MD_size(md);
if (pss->salt_len > RSA_PSS_SALT_LEN_DEFAULT)
{
slen = pss->salt_len;
}
if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 ||
EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, slen) <= 0 ||
EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, pss->salt_len) <= 0 ||
EVP_PKEY_CTX_set_rsa_mgf1_md(pctx, mgf1md) <= 0)
{
goto error;
src/libstrongswan/plugins/openssl/openssl_rsa_public_key.c
+1 -6
View File
@@ -95,13 +95,8 @@ static bool verify_signature(private_openssl_rsa_public_key_t *this,
if (pss)
{
const EVP_MD *mgf1md = openssl_get_md(pss->mgf1_hash);
int slen = EVP_MD_size(md);
if (pss->salt_len > RSA_PSS_SALT_LEN_DEFAULT)
{
slen = pss->salt_len;
}
if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 ||
EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, slen) <= 0 ||
EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, pss->salt_len) <= 0 ||
EVP_PKEY_CTX_set_rsa_mgf1_md(pctx, mgf1md) <= 0)
{
goto error;