Initial commit

hm_stud/shctx.h

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+/*
+ * shctx.h
+ *
+ * Copyright (C) 2011 EXCELIANCE
+ *
+ * Author: Emeric Brun - emeric@exceliance.fr
+ *
+ */
+
+#ifndef SHCTX_H
+#define SHCTX_H
+#include <openssl/ssl.h>
+#include <stdint.h>
+
+#ifndef SHSESS_MAX_FOOTER_LEN
+#define SHSESS_MAX_FOOTER_LEN sizeof(uint32_t) \
+				+ EVP_MAX_MD_SIZE
+#endif 
+
+#ifndef SHSESS_MAX_DATA_LEN
+#define SHSESS_MAX_DATA_LEN 512
+#endif
+
+#define SHSESS_MAX_ENCODED_LEN SSL_MAX_SSL_SESSION_ID_LENGTH \
+				+ SHSESS_MAX_DATA_LEN \
+				+ SHSESS_MAX_FOOTER_LEN
+
+
+/* Callback called on a new session event:
+ * session contains the sessionid zeros padded to SSL_MAX_SSL_SESSION_ID_LENGTH
+ *                                               followed by ASN1 session encoding.
+ * len is set to SSL_MAX_SSL_SESSION_ID_LENGTH + ASN1 session length
+ * len is always less than SSL_MAX_SSL_SESSION_ID_LENGTH + SHSESS_MAX_DATA_LEN.
+ * Remaining Bytes from len to SHSESS_MAX_ENCODED_LEN can be used to add a footer.
+ * cdate is the creation date timestamp.
+ */ 
+void shsess_set_new_cbk(void (*func)(unsigned char *session, unsigned int len, long cdate));
+
+/* Add a session into the cache, 
+ * session contains the sessionid zeros padded to SSL_MAX_SSL_SESSION_ID_LENGTH
+ *                                             followed by ASN1 session encoding.
+ * len is set to SSL_MAX_SSL_SESSION_ID_LENGTH + ASN1 data length.
+ *            if len greater than SHSESS_MAX_ENCODED_LEN, session is not added.
+ * if cdate not 0, on get events session creation date will be reset to cdate */
+void shctx_sess_add(const unsigned char *session, unsigned int session_len, long cdate);
+
+/* Init shared memory context if not allocated and set SSL context callbacks
+ * size is the max number of stored session 
+ * Returns: -1 on alloc failure, size if performs context alloc, and 0 if just
+ * perform callbacks registration */
+int shared_context_init(SSL_CTX *ctx, int size);
+
+#endif /* SHCTX_H */