Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / include / ipxe / drbg.h

diff --git a/qemu/roms/ipxe/src/include/ipxe/drbg.h b/qemu/roms/ipxe/src/include/ipxe/drbg.h
new file mode 100644 (file)
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+++ b/qemu/roms/ipxe/src/include/ipxe/drbg.h
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+#ifndef _IPXE_DRBG_H
+#define _IPXE_DRBG_H
+
+/** @file
+ *
+ * DRBG mechanism
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <ipxe/sha256.h>
+#include <ipxe/hmac_drbg.h>
+
+/** Choose HMAC_DRBG using SHA-256
+ *
+ * HMAC_DRBG using SHA-256 is an Approved algorithm in ANS X9.82.
+ */
+#define HMAC_DRBG_ALGORITHM HMAC_DRBG_SHA256
+
+/** Maximum security strength */
+#define DRBG_MAX_SECURITY_STRENGTH \
+       HMAC_DRBG_MAX_SECURITY_STRENGTH ( HMAC_DRBG_ALGORITHM )
+
+/** Security strength
+ *
+ * We choose to operate at a strength of 128 bits.
+ */
+#define DRBG_SECURITY_STRENGTH 128
+
+/** Minimum entropy input length */
+#define DRBG_MIN_ENTROPY_LEN_BYTES \
+       HMAC_DRBG_MIN_ENTROPY_LEN_BYTES ( DRBG_SECURITY_STRENGTH )
+
+/** Maximum entropy input length */
+#define DRBG_MAX_ENTROPY_LEN_BYTES HMAC_DRBG_MAX_ENTROPY_LEN_BYTES
+
+/** Maximum personalisation string length */
+#define DRBG_MAX_PERSONAL_LEN_BYTES HMAC_DRBG_MAX_PERSONAL_LEN_BYTES
+
+/** Maximum additional input length */
+#define DRBG_MAX_ADDITIONAL_LEN_BYTES HMAC_DRBG_MAX_ADDITIONAL_LEN_BYTES
+
+/** Maximum length of generated pseudorandom data per request */
+#define DRBG_MAX_GENERATED_LEN_BYTES HMAC_DRBG_MAX_GENERATED_LEN_BYTES
+
+/** A Deterministic Random Bit Generator */
+struct drbg_state {
+       /** Algorithm internal state */
+       struct hmac_drbg_state internal;
+       /** Reseed required flag */
+       int reseed_required;
+       /** State is valid */
+       int valid;
+};
+
+/**
+ * Instantiate DRBG algorithm
+ *
+ * @v state            Algorithm state
+ * @v entropy          Entropy input
+ * @v entropy_len      Length of entropy input
+ * @v personal         Personalisation string
+ * @v personal_len     Length of personalisation string
+ *
+ * This is the Instantiate_algorithm function defined in ANS X9.82
+ * Part 3-2007 Section 9.2 (NIST SP 800-90 Section 9.1).
+ */
+static inline void drbg_instantiate_algorithm ( struct drbg_state *state,
+                                               const void *entropy,
+                                               size_t entropy_len,
+                                               const void *personal,
+                                               size_t personal_len ) {
+       hmac_drbg_instantiate ( HMAC_DRBG_HASH ( HMAC_DRBG_ALGORITHM ),
+                               &state->internal, entropy, entropy_len,
+                               personal, personal_len );
+}
+
+/**
+ * Reseed DRBG algorithm
+ *
+ * @v state            Algorithm state
+ * @v entropy          Entropy input
+ * @v entropy_len      Length of entropy input
+ * @v additional       Additional input
+ * @v additional_len   Length of additional input
+ *
+ * This is the Reseed_algorithm function defined in ANS X9.82
+ * Part 3-2007 Section 9.3 (NIST SP 800-90 Section 9.2).
+ */
+static inline void drbg_reseed_algorithm ( struct drbg_state *state,
+                                          const void *entropy,
+                                          size_t entropy_len,
+                                          const void *additional,
+                                          size_t additional_len ) {
+       hmac_drbg_reseed ( HMAC_DRBG_HASH ( HMAC_DRBG_ALGORITHM ),
+                          &state->internal, entropy, entropy_len,
+                          additional, additional_len );
+}
+
+/**
+ * Generate pseudorandom bits using DRBG algorithm
+ *
+ * @v state            Algorithm state
+ * @v additional       Additional input
+ * @v additional_len   Length of additional input
+ * @v data             Output buffer
+ * @v len              Length of output buffer
+ * @ret rc             Return status code
+ *
+ * This is the Generate_algorithm function defined in ANS X9.82
+ * Part 3-2007 Section 9.4 (NIST SP 800-90 Section 9.3).
+ *
+ * Note that the only permitted error is "reseed required".
+ */
+static inline int drbg_generate_algorithm ( struct drbg_state *state,
+                                           const void *additional,
+                                           size_t additional_len,
+                                           void *data, size_t len ) {
+       return hmac_drbg_generate ( HMAC_DRBG_HASH ( HMAC_DRBG_ALGORITHM ),
+                                   &state->internal, additional,
+                                   additional_len, data, len );
+}
+
+extern int drbg_instantiate ( struct drbg_state *state, const void *personal,
+                             size_t personal_len );
+extern int drbg_reseed ( struct drbg_state *state, const void *additional,
+                        size_t additional_len );
+extern int drbg_generate ( struct drbg_state *state, const void *additional,
+                          size_t additional_len, int prediction_resist,
+                          void *data, size_t len );
+extern void drbg_uninstantiate ( struct drbg_state *state );
+
+#endif /* _IPXE_DRBG_H */