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src: Helper funtions to detect PKCS #11 URIs

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Signed-off-by: Sahana Prasad <sahana@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Sahana Prasad
2019-12-18 22:54:15 +01:00
committed by Andreas Schneider
parent 86a0dfa65b
commit 6bf4ada240
2 changed files with 48 additions and 0 deletions
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5
include/libssh/pki.h
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@@ -162,4 +162,9 @@ ssh_public_key ssh_pki_convert_key_to_publickey(const ssh_key key);
ssh_private_key ssh_pki_convert_key_to_privatekey(const ssh_key key);
int ssh_key_algorithm_allowed(ssh_session session, const char *type);
/* PKCS11 URI function to check if filename is a path or a PKCS11 URI */
bool ssh_pki_is_uri(const char *filename);
char *ssh_pki_export_pub_uri_from_priv_uri(const char *priv_uri);
#endif /* PKI_H_ */

43
src/pki.c
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@@ -64,6 +64,8 @@
#include "libssh/misc.h"
#include "libssh/agent.h"
#define PKCS11_URI "pkcs11:"
enum ssh_keytypes_e pki_privatekey_type_from_string(const char *privkey)
{
char *start = NULL;
@@ -1568,6 +1570,47 @@ fail:
return SSH_ERROR;
}
/**
*@brief Detect if the pathname in cmp is a PKCS #11 URI.
*
* @param[in] cmp The path to the public/private key
* or a private/public PKCS #11 URI.
*
* @returns true if filename is a URI starting with "pkcs11:"
* false otherwise.
*/
bool ssh_pki_is_uri(const char *cmp)
{
int rc;
rc = strncmp(cmp, PKCS11_URI, strlen(PKCS11_URI));
if (rc == 0) {
return true;
}
return false;
}
/**
*@brief export a Public PKCS #11 URI from a Private PKCS #11 URI
* by replacing "type=private" to "type=public".
* TODO: Improve the parser
*
* @param[in] priv_uri Private PKCS #11 URI.
*
* @returns pointer to the public PKCS #11 URI
*/
char *ssh_pki_export_pub_uri_from_priv_uri(const char *priv_uri)
{
char *pub_uri_temp = strdup(priv_uri);
pub_uri_temp = ssh_strreplace(pub_uri_temp,
"type=private",
"type=public");
return pub_uri_temp;
}
/**
* @brief Import a public key from the given filename.
*