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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Copyright 2014 Freescale Semiconductor, Inc.
- */
- #ifndef _RSA_MOD_EXP_H
- #define _RSA_MOD_EXP_H
- #include <errno.h>
- #include <image.h>
- /**
- * struct key_prop - holder for a public key properties
- *
- * The struct has pointers to modulus (Typically called N),
- * The inverse, R^2, exponent. These can be typecasted and
- * used as byte arrays or converted to the required format
- * as per requirement of RSA implementation.
- */
- struct key_prop {
- const void *rr; /* R^2 can be treated as byte array */
- const void *modulus; /* modulus as byte array */
- const void *public_exponent; /* public exponent as byte array */
- uint32_t n0inv; /* -1 / modulus[0] mod 2^32 */
- int num_bits; /* Key length in bits */
- uint32_t exp_len; /* Exponent length in number of uint8_t */
- };
- /**
- * rsa_gen_key_prop() - Generate key properties of RSA public key
- * @key: Specifies key data in DER format
- * @keylen: Length of @key
- * @prop: Generated key property
- *
- * This function takes a blob of encoded RSA public key data in DER
- * format, parse it and generate all the relevant properties
- * in key_prop structure.
- * Return a pointer to struct key_prop in @prop on success.
- *
- * Return: 0 on success, negative on error
- */
- int rsa_gen_key_prop(const void *key, uint32_t keylen, struct key_prop **proc);
- /**
- * rsa_free_key_prop() - Free key properties
- * @prop: Pointer to struct key_prop
- *
- * This function frees all the memories allocated by rsa_gen_key_prop().
- */
- void rsa_free_key_prop(struct key_prop *prop);
- /**
- * rsa_mod_exp_sw() - Perform RSA Modular Exponentiation in sw
- *
- * Operation: out[] = sig ^ exponent % modulus
- *
- * @sig: RSA PKCS1.5 signature
- * @sig_len: Length of signature in number of bytes
- * @node: Node with RSA key elements like modulus, exponent, R^2, n0inv
- * @out: Result in form of byte array of len equal to sig_len
- */
- int rsa_mod_exp_sw(const uint8_t *sig, uint32_t sig_len,
- struct key_prop *node, uint8_t *out);
- int rsa_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
- struct key_prop *node, uint8_t *out);
- #if defined(CONFIG_CMD_ZYNQ_RSA)
- int zynq_pow_mod(u32 *keyptr, u32 *inout);
- #endif
- /**
- * struct struct mod_exp_ops - Driver model for RSA Modular Exponentiation
- * operations
- *
- * The uclass interface is implemented by all crypto devices which use
- * driver model.
- */
- struct mod_exp_ops {
- /**
- * Perform Modular Exponentiation
- *
- * Operation: out[] = sig ^ exponent % modulus
- *
- * @dev: RSA Device
- * @sig: RSA PKCS1.5 signature
- * @sig_len: Length of signature in number of bytes
- * @node: Node with RSA key elements like modulus, exponent,
- * R^2, n0inv
- * @out: Result in form of byte array of len equal to sig_len
- *
- * This function computes exponentiation over the signature.
- * Returns: 0 if exponentiation is successful, or a negative value
- * if it wasn't.
- */
- int (*mod_exp)(struct udevice *dev, const uint8_t *sig,
- uint32_t sig_len, struct key_prop *node,
- uint8_t *outp);
- };
- #endif
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