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From 47f922c797006a3158fa3e077a7086086917b5e4 Mon Sep 17 00:00:00 2001
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From: Andreas Schneider <asn@samba.org>
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Date: Thu, 18 Jul 2019 13:33:54 +0200
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Subject: [PATCH 007/187] lib:crypto: Document
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samba_gnutls_arcfour_confounded_md5()
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Signed-off-by: Andreas Schneider <asn@samba.org>
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Reviewed-by: Andrew Bartlett <abartlet@samba.org>
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(cherry picked from commit baa96ef20945638fb5ee76b03543c7b611e9c7d7)
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---
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lib/crypto/gnutls_helpers.h | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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diff --git a/lib/crypto/gnutls_helpers.h b/lib/crypto/gnutls_helpers.h
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index debaa701554..d6000c7b316 100644
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--- a/lib/crypto/gnutls_helpers.h
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+++ b/lib/crypto/gnutls_helpers.h
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@@ -69,6 +69,24 @@ enum samba_gnutls_direction {
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SAMBA_GNUTLS_DECRYPT
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};
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+/**
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+ * @brief Encrypt or decrypt a data blob using RC4 with a key and salt.
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+ *
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+ * One of the key input should be a session key and the other a confounder
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+ * (aka salt). Which one depends on the implementation details of the
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+ * protocol.
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+ *
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+ * @param[in] key_input1 Either a session_key or a confounder.
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+ *
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+ * @param[in] key_input2 Either a session_key or a confounder.
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+ *
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+ * @param[in] data The data blob ot either encrypt or decrypt. The data
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+ * will be encrypted or decrypted in place.
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+ *
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+ * @param[in] encrypt The encryption direction.
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+ *
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+ * @return A gnutls error code.
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+ */
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int samba_gnutls_arcfour_confounded_md5(const DATA_BLOB *key_input1,
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const DATA_BLOB *key_input2,
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DATA_BLOB *data,
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--
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2.23.0
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