1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright 2014 Freescale Semiconductor, Inc.
13 * struct key_prop - holder for a public key properties
15 * The struct has pointers to modulus (Typically called N),
16 * The inverse, R^2, exponent. These can be typecasted and
17 * used as byte arrays or converted to the required format
18 * as per requirement of RSA implementation.
21 const void *rr; /* R^2 can be treated as byte array */
22 const void *modulus; /* modulus as byte array */
23 const void *public_exponent; /* public exponent as byte array */
24 uint32_t n0inv; /* -1 / modulus[0] mod 2^32 */
25 int num_bits; /* Key length in bits */
26 uint32_t exp_len; /* Exponent length in number of uint8_t */
30 * rsa_gen_key_prop() - Generate key properties of RSA public key
31 * @key: Specifies key data in DER format
32 * @keylen: Length of @key
33 * @prop: Generated key property
35 * This function takes a blob of encoded RSA public key data in DER
36 * format, parse it and generate all the relevant properties
37 * in key_prop structure.
38 * Return a pointer to struct key_prop in @prop on success.
40 * Return: 0 on success, negative on error
42 int rsa_gen_key_prop(const void *key, uint32_t keylen, struct key_prop **proc);
45 * rsa_free_key_prop() - Free key properties
46 * @prop: Pointer to struct key_prop
48 * This function frees all the memories allocated by rsa_gen_key_prop().
50 void rsa_free_key_prop(struct key_prop *prop);
53 * rsa_mod_exp_sw() - Perform RSA Modular Exponentiation in sw
55 * Operation: out[] = sig ^ exponent % modulus
57 * @sig: RSA PKCS1.5 signature
58 * @sig_len: Length of signature in number of bytes
59 * @node: Node with RSA key elements like modulus, exponent, R^2, n0inv
60 * @out: Result in form of byte array of len equal to sig_len
62 int rsa_mod_exp_sw(const uint8_t *sig, uint32_t sig_len,
63 struct key_prop *node, uint8_t *out);
65 int rsa_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
66 struct key_prop *node, uint8_t *out);
68 #if defined(CONFIG_CMD_ZYNQ_RSA)
69 int zynq_pow_mod(u32 *keyptr, u32 *inout);
73 * struct struct mod_exp_ops - Driver model for RSA Modular Exponentiation
76 * The uclass interface is implemented by all crypto devices which use
81 * Perform Modular Exponentiation
83 * Operation: out[] = sig ^ exponent % modulus
86 * @sig: RSA PKCS1.5 signature
87 * @sig_len: Length of signature in number of bytes
88 * @node: Node with RSA key elements like modulus, exponent,
90 * @out: Result in form of byte array of len equal to sig_len
92 * This function computes exponentiation over the signature.
93 * Returns: 0 if exponentiation is successful, or a negative value
96 int (*mod_exp)(struct udevice *dev, const uint8_t *sig,
97 uint32_t sig_len, struct key_prop *node,