/* SPDX-License-Identifier: GPL-2.0 */ /* * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors * * Copyright 2016 Freescale Semiconductor, Inc. * * There is no Shared Descriptor for PKC so that the Job Descriptor must carry * all the desired key parameters, input and output pointers. */ #ifndef _PKC_DESC_H_ #define _PKC_DESC_H_ #include "compat.h" #include "pdb.h" /** * caam_priv_key_form - CAAM RSA private key representation * CAAM RSA private key may have either of three forms. * * 1. The first representation consists of the pair (n, d), where the * components have the following meanings: * n the RSA modulus * d the RSA private exponent * * 2. The second representation consists of the triplet (p, q, d), where the * components have the following meanings: * p the first prime factor of the RSA modulus n * q the second prime factor of the RSA modulus n * d the RSA private exponent * * 3. The third representation consists of the quintuple (p, q, dP, dQ, qInv), * where the components have the following meanings: * p the first prime factor of the RSA modulus n * q the second prime factor of the RSA modulus n * dP the first factors's CRT exponent * dQ the second factors's CRT exponent * qInv the (first) CRT coefficient * * The benefit of using the third or the second key form is lower computational * cost for the decryption and signature operations. */ enum caam_priv_key_form { … }; /** * caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone. * @n : RSA modulus raw byte stream * @e : RSA public exponent raw byte stream * @d : RSA private exponent raw byte stream * @p : RSA prime factor p of RSA modulus n * @q : RSA prime factor q of RSA modulus n * @dp : RSA CRT exponent of p * @dp : RSA CRT exponent of q * @qinv : RSA CRT coefficient * @tmp1 : CAAM uses this temporary buffer as internal state buffer. * It is assumed to be as long as p. * @tmp2 : CAAM uses this temporary buffer as internal state buffer. * It is assumed to be as long as q. * @n_sz : length in bytes of RSA modulus n * @e_sz : length in bytes of RSA public exponent * @d_sz : length in bytes of RSA private exponent * @p_sz : length in bytes of RSA prime factor p of RSA modulus n * @q_sz : length in bytes of RSA prime factor q of RSA modulus n * @priv_form : CAAM RSA private key representation */ struct caam_rsa_key { … }; /** * caam_rsa_ctx - per session context. * @key : RSA key in DMA zone * @dev : device structure * @padding_dma : dma address of padding, for adding it to the input */ struct caam_rsa_ctx { … }; /** * caam_rsa_req_ctx - per request context. * @src : input scatterlist (stripped of leading zeros) * @fixup_src : input scatterlist (that might be stripped of leading zeros) * @fixup_src_len : length of the fixup_src input scatterlist * @edesc : s/w-extended rsa descriptor * @akcipher_op_done : callback used when operation is done */ struct caam_rsa_req_ctx { … }; /** * rsa_edesc - s/w-extended rsa descriptor * @src_nents : number of segments in input s/w scatterlist * @dst_nents : number of segments in output s/w scatterlist * @mapped_src_nents: number of segments in input h/w link table * @mapped_dst_nents: number of segments in output h/w link table * @sec4_sg_bytes : length of h/w link table * @bklog : stored to determine if the request needs backlog * @sec4_sg_dma : dma address of h/w link table * @sec4_sg : pointer to h/w link table * @pdb : specific RSA Protocol Data Block (PDB) * @hw_desc : descriptor followed by link tables if any */ struct rsa_edesc { … }; /* Descriptor construction primitives. */ void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb); void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb); void init_rsa_priv_f2_desc(u32 *desc, struct rsa_priv_f2_pdb *pdb); void init_rsa_priv_f3_desc(u32 *desc, struct rsa_priv_f3_pdb *pdb); #endif
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