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