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Implement new _libssh2_cipher_* API.

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This commit is contained in:
Simon Josefsson
2007-01-18 11:20:17 +00:00
parent e1bebf979b
commit d3c334c3d6
4 changed files with 141 additions and 0 deletions
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62
src/libgcrypt.c
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@@ -151,3 +151,65 @@ int _libssh2_dsa_sha1_verify(libssh2_dsa_ctx *dsactx,
return (rc == 0) ? 0 : -1;
}
int _libssh2_cipher_init (_libssh2_cipher_ctx *h,
_libssh2_cipher_type(algo),
unsigned char *iv,
unsigned char *secret,
int encrypt)
{
int mode = 0, keylen, err;
keylen = gcry_cipher_get_algo_keylen (algo);
if (algo != GCRY_CIPHER_ARCFOUR)
{
mode = GCRY_CIPHER_MODE_CBC;
}
err = gcry_cipher_open (h, algo, mode, 0);
if (err)
{
return -1;
}
err = gcry_cipher_setkey (*h, secret, keylen);
if (err)
{
return -1;
}
if (algo != GCRY_CIPHER_ARCFOUR)
{
int blklen = gcry_cipher_get_algo_blklen (algo);
err = gcry_cipher_setiv (*h, iv, blklen);
if (err)
{
return -1;
}
}
return 0;
}
int _libssh2_cipher_crypt(_libssh2_cipher_ctx *ctx,
_libssh2_cipher_type(algo),
int encrypt,
unsigned char *block)
{
size_t blklen = gcry_cipher_get_algo_blklen (algo);
int err;
if (blklen == 1) {
/* Hack for arcfour. */
blklen = 8;
}
if (encrypt)
{
err = gcry_cipher_encrypt (*ctx, block, blklen,
block, blklen);
}
else
{
err = gcry_cipher_decrypt (*ctx, block, blklen,
block, blklen);
}
return err;
}