mirror of https://github.com/openssl/openssl.git
76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/*
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* Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* Internal LMS/LM_OTS functions for other submodules,
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* not for application use
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*
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* Refer to RFC 8554 Sections 5.4 & 4.5 for information related to
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* LMS Signatures & LM_OTS Signature Generation respectively.
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*/
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#ifndef OSSL_CRYPTO_LMS_SIG_H
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# define OSSL_CRYPTO_LMS_SIG_H
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# pragma once
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# ifndef OPENSSL_NO_LMS
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# include "lms.h"
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# include "internal/packet.h"
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/* The values defined for 8 byte TAGS */
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extern const uint16_t OSSL_LMS_D_PBLC; /* 8080 */
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extern const uint16_t OSSL_LMS_D_MESG; /* 8181 */
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extern const uint16_t OSSL_LMS_D_LEAF; /* 8282 */
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extern const uint16_t OSSL_LMS_D_INTR; /* 8383 */
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/* Used by OTS signature when calculating Q || Cksm(Q) */
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# define LMS_SIZE_CHECKSUM 2
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# define LMS_SIZE_QSUM 2
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/*
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* An object for storing a One-Time Signature
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* See RFC 8554 Section 4.5
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*/
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typedef struct lm_ots_sig_st {
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const LM_OTS_PARAMS *params;
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/* For verify operations the following pointers are not allocated */
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unsigned char *C; /* A salt value of size n */
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unsigned char *y; /* The trailing part of a signature of size p * n */
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} LM_OTS_SIG;
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/*
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* An object for storing a LMS signature
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* See RFC 8554 Section 5.4
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*/
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typedef struct lms_signature_st {
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uint32_t q;
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LM_OTS_SIG sig;
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const LMS_PARAMS *params; /* contains the LMS type */
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unsigned char *paths; /* size is h * m */
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} LMS_SIG;
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LMS_SIG *ossl_lms_sig_new(void);
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void ossl_lms_sig_free(LMS_SIG *sig);
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LMS_SIG *ossl_lms_sig_from_pkt(PACKET *pkt, const LMS_KEY *pub);
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int ossl_lms_sig_decode(LMS_SIG **out, LMS_KEY *pub,
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const unsigned char *sig, size_t siglen);
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int ossl_lms_sig_verify(const LMS_SIG *lms_sig, const LMS_KEY *pub,
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const EVP_MD *md,
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const unsigned char *msg, size_t msglen);
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int ossl_lm_ots_compute_pubkey(EVP_MD_CTX *ctx, EVP_MD_CTX *ctxIq,
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const LM_OTS_SIG *sig, const LM_OTS_PARAMS *pub,
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const unsigned char *Id, uint32_t q,
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const unsigned char *msg, size_t msglen,
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unsigned char *Kc);
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uint16_t ossl_lm_ots_params_checksum(const LM_OTS_PARAMS *params,
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const unsigned char *S);
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# endif /* OPENSSL_NO_LMS */
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#endif /* OSSL_CRYPTO_LMS_SIG_H */
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