rsa.h

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#ifndef _IPXE_RSA_H
#define _IPXE_RSA_H

/** @file
 *
 * RSA public-key cryptography
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );

#include <stdarg.h>
#include <ipxe/crypto.h>
#include <ipxe/bigint.h>
#include <ipxe/asn1.h>
#include <ipxe/tables.h>

/** RSA digestAlgorithm sequence contents */
#define RSA_DIGESTALGORITHM_CONTENTS( ... )                             \
        ASN1_OID, VA_ARG_COUNT ( __VA_ARGS__ ), __VA_ARGS__,            \
        ASN1_NULL, 0x00

/** RSA digestAlgorithm sequence */
#define RSA_DIGESTALGORITHM( ... )                                      \
        ASN1_SEQUENCE,                                                  \
        VA_ARG_COUNT ( RSA_DIGESTALGORITHM_CONTENTS ( __VA_ARGS__ ) ),  \
        RSA_DIGESTALGORITHM_CONTENTS ( __VA_ARGS__ )

/** RSA digest prefix */
#define RSA_DIGEST_PREFIX( digest_size )                                \
        ASN1_OCTET_STRING, digest_size

/** RSA digestInfo prefix */
#define RSA_DIGESTINFO_PREFIX( digest_size, ... )                       \
        ASN1_SEQUENCE,                                                  \
        ( VA_ARG_COUNT ( RSA_DIGESTALGORITHM ( __VA_ARGS__ ) ) +        \
          VA_ARG_COUNT ( RSA_DIGEST_PREFIX ( digest_size ) ) +          \
          digest_size ),                                                \
        RSA_DIGESTALGORITHM ( __VA_ARGS__ ),                            \
        RSA_DIGEST_PREFIX ( digest_size )

/** An RSA digestInfo prefix */
struct rsa_digestinfo_prefix {
        /** Digest algorithm */
        struct digest_algorithm *digest;
        /** Prefix */
        const void *data;
        /** Length of prefix */
        size_t len;
};

/** RSA digestInfo prefix table */
#define RSA_DIGESTINFO_PREFIXES \
        __table ( struct rsa_digestinfo_prefix, "rsa_digestinfo_prefixes" )

/** Declare an RSA digestInfo prefix */
#define __rsa_digestinfo_prefix __table_entry ( RSA_DIGESTINFO_PREFIXES, 01 )

extern struct pubkey_algorithm rsa_algorithm;

#endif /* _IPXE_RSA_H */