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auth: Support SHA2 extension for pubkey authentication (RFC 8332)

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Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Jakub Jelen
2018-08-06 13:40:32 +02:00
committed by Andreas Schneider
parent 1f08aabe43
commit 82da0c3361
3 changed files with 35 additions and 7 deletions
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24
src/pki.c
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@@ -282,8 +282,8 @@ static enum ssh_digest_e ssh_key_hash_from_name(const char *name)
*
* @return A hash type to be used.
*/
static enum ssh_keytypes_e ssh_key_type_to_hash(ssh_session session,
enum ssh_keytypes_e type)
static enum ssh_digest_e ssh_key_type_to_hash(ssh_session session,
enum ssh_keytypes_e type)
{
/* TODO this should also reflect supported key types specified in
* configuration (ssh_config PubkeyAcceptedKeyTypes) */
@@ -309,6 +309,26 @@ static enum ssh_keytypes_e ssh_key_type_to_hash(ssh_session session,
return SSH_DIGEST_AUTO;
}
/**
* @brief Gets signature algorithm name to be used with the given
* key type.
*
* @param[in] session SSH session.
* @param[in] type The algorithm type to convert.
*
* @return A string for the keytype or NULL if unknown.
*/
const char *
ssh_key_get_signature_algorithm(ssh_session session,
enum ssh_keytypes_e type)
{
enum ssh_digest_e hash_type;
hash_type = ssh_key_type_to_hash(session, type);
return ssh_key_signature_to_char(type, hash_type);
}
/**
* @brief Convert a ssh key algorithm name to a ssh key algorithm type.
*