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Add support for ECDSA keys and host keys (#41)

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This commit lands full ECDSA key support when using the OpenSSL
backend. Which includes:

New KEX methods:
ecdsa-sha2-nistp256, ecdsa-sha2-nistp384, ecdsa-sha2-nistp521

Can now read OpenSSL formatted ECDSA key files.

Now supports known host keys of type ecdsa-sha2-nistp256.

New curve types:
NID_X9_62_prime256v1, NID_secp384r1, NID_secp521r1

Default host key preferred ordering is now nistp256, nistp384,
nistp521, rsa, dss.

Ref: https://github.com/libssh2/libssh2/issues/41

Closes https://github.com/libssh2/libssh2/pull/206
This commit is contained in:
Will Cosgrove
2017-08-31 14:57:40 -07:00
committed by Viktor Szakats
parent bcd492163b
commit aba34f5f56
13 changed files with 2087 additions and 110 deletions
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10
include/libssh2.h
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@@ -404,11 +404,12 @@ typedef struct _LIBSSH2_POLLFD {
#define LIBSSH2_HOSTKEY_HASH_MD5 1
#define LIBSSH2_HOSTKEY_HASH_SHA1 2
#define LIBSSH2_HOSTKEY_HASH_SHA256 3
/* Hostkey Types */
#define LIBSSH2_HOSTKEY_TYPE_UNKNOWN 0
#define LIBSSH2_HOSTKEY_TYPE_RSA 1
#define LIBSSH2_HOSTKEY_TYPE_DSS 2
#define LIBSSH2_HOSTKEY_TYPE_UNKNOWN 0
#define LIBSSH2_HOSTKEY_TYPE_RSA 1
#define LIBSSH2_HOSTKEY_TYPE_DSS 2
#define LIBSSH2_HOSTKEY_TYPE_ECDSA 3
/* Disconnect Codes (defined by SSH protocol) */
#define SSH_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1
@@ -967,6 +968,7 @@ libssh2_knownhost_init(LIBSSH2_SESSION *session);
#define LIBSSH2_KNOWNHOST_KEY_RSA1 (1<<18)
#define LIBSSH2_KNOWNHOST_KEY_SSHRSA (2<<18)
#define LIBSSH2_KNOWNHOST_KEY_SSHDSS (3<<18)
#define LIBSSH2_KNOWNHOST_KEY_ECDSA (4<<18)
#define LIBSSH2_KNOWNHOST_KEY_UNKNOWN (7<<18)
LIBSSH2_API int