mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright 2014 Freescale Semiconductor, Inc.
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*/
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#ifndef _RSA_MOD_EXP_H
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#define _RSA_MOD_EXP_H
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#include <errno.h>
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#include <image.h>
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/**
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* struct key_prop - holder for a public key properties
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*
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* The struct has pointers to modulus (Typically called N),
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* The inverse, R^2, exponent. These can be typecasted and
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* used as byte arrays or converted to the required format
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* as per requirement of RSA implementation.
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*/
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struct key_prop {
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const void *rr; /* R^2 can be treated as byte array */
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const void *modulus; /* modulus as byte array */
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const void *public_exponent; /* public exponent as byte array */
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uint32_t n0inv; /* -1 / modulus[0] mod 2^32 */
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int num_bits; /* Key length in bits */
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uint32_t exp_len; /* Exponent length in number of uint8_t */
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};
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/**
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* rsa_mod_exp_sw() - Perform RSA Modular Exponentiation in sw
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*
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* Operation: out[] = sig ^ exponent % modulus
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*
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* @sig: RSA PKCS1.5 signature
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* @sig_len: Length of signature in number of bytes
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* @node: Node with RSA key elements like modulus, exponent, R^2, n0inv
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* @out: Result in form of byte array of len equal to sig_len
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*/
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int rsa_mod_exp_sw(const uint8_t *sig, uint32_t sig_len,
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struct key_prop *node, uint8_t *out);
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int rsa_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
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struct key_prop *node, uint8_t *out);
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/**
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* struct struct mod_exp_ops - Driver model for RSA Modular Exponentiation
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* operations
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*
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* The uclass interface is implemented by all crypto devices which use
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* driver model.
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*/
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struct mod_exp_ops {
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/**
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* Perform Modular Exponentiation
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*
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* Operation: out[] = sig ^ exponent % modulus
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*
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* @dev: RSA Device
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* @sig: RSA PKCS1.5 signature
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* @sig_len: Length of signature in number of bytes
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* @node: Node with RSA key elements like modulus, exponent,
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* R^2, n0inv
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* @out: Result in form of byte array of len equal to sig_len
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*
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* This function computes exponentiation over the signature.
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* Returns: 0 if exponentiation is successful, or a negative value
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* if it wasn't.
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*/
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int (*mod_exp)(struct udevice *dev, const uint8_t *sig,
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uint32_t sig_len, struct key_prop *node,
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uint8_t *outp);
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};
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#endif
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