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122 lines
5.2 KiB
C
122 lines
5.2 KiB
C
/**
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* \file rsa_internal.h
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*
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* \brief Internal-only RSA public-key cryptosystem API.
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*
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* This file declares RSA-related functions that are to be used
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* only from within the Mbed TLS library itself.
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*
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*/
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/*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*/
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#ifndef MBEDTLS_RSA_INTERNAL_H
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#define MBEDTLS_RSA_INTERNAL_H
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#include "mbedtls/rsa.h"
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#include "mbedtls/asn1.h"
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/**
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* \brief Parse a PKCS#1 (ASN.1) encoded private RSA key.
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*
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* \param rsa The RSA context where parsed data will be stored.
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* \param key The buffer that contains the key.
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* \param keylen The length of the key buffer in bytes.
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*
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* \return 0 on success.
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* \return MBEDTLS_ERR_ASN1_xxx in case of ASN.1 parsing errors.
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* \return MBEDTLS_ERR_RSA_xxx in case of RSA internal failures while
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* parsing data.
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* \return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED if validity checks on the
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* provided key fail.
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*/
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int mbedtls_rsa_parse_key(mbedtls_rsa_context *rsa, const unsigned char *key, size_t keylen);
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/**
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* \brief Parse a PKCS#1 (ASN.1) encoded public RSA key.
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*
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* \param rsa The RSA context where parsed data will be stored.
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* \param key The buffer that contains the key.
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* \param keylen The length of the key buffer in bytes.
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*
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* \return 0 on success.
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* \return MBEDTLS_ERR_ASN1_xxx in case of ASN.1 parsing errors.
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* \return MBEDTLS_ERR_RSA_xxx in case of RSA internal failures while
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* parsing data.
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* \return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED if validity checks on the
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* provided key fail.
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*/
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int mbedtls_rsa_parse_pubkey(mbedtls_rsa_context *rsa, const unsigned char *key, size_t keylen);
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/**
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* \brief Write a PKCS#1 (ASN.1) encoded private RSA key.
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*
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* \param rsa The RSA context which contains the data to be written.
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* \param start Beginning of the buffer that will be filled with the
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* private key.
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* \param p End of the buffer that will be filled with the private key.
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* On successful return, the referenced pointer will be
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* updated in order to point to the beginning of written data.
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*
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* \return On success, the number of bytes written to the output buffer
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* (i.e. a value > 0).
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* \return MBEDTLS_ERR_RSA_BAD_INPUT_DATA if the RSA context does not
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* contain a valid key pair.
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* \return MBEDTLS_ERR_ASN1_xxx in case of failure while writing to the
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* output buffer.
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*
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* \note The output buffer is filled backward, i.e. starting from its
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* end and moving toward its start.
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*/
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int mbedtls_rsa_write_key(const mbedtls_rsa_context *rsa, unsigned char *start,
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unsigned char **p);
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/**
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* \brief Parse a PKCS#1 (ASN.1) encoded public RSA key.
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*
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* \param rsa The RSA context which contains the data to be written.
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* \param start Beginning of the buffer that will be filled with the
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* private key.
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* \param p End of the buffer that will be filled with the private key.
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* On successful return, the referenced pointer will be
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* updated in order to point to the beginning of written data.
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*
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* \return On success, the number of bytes written to the output buffer
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* (i.e. a value > 0).
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* \return MBEDTLS_ERR_RSA_BAD_INPUT_DATA if the RSA context does not
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* contain a valid public key.
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* \return MBEDTLS_ERR_ASN1_xxx in case of failure while writing to the
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* output buffer.
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*
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* \note The output buffer is filled backward, i.e. starting from its
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* end and moving toward its start.
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*/
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int mbedtls_rsa_write_pubkey(const mbedtls_rsa_context *rsa, unsigned char *start,
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unsigned char **p);
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#if defined(MBEDTLS_PKCS1_V21)
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/**
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* \brief This function is analogue to \c mbedtls_rsa_rsassa_pss_sign().
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* The only difference between them is that this function is more flexible
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* on the parameters of \p ctx that are set with \c mbedtls_rsa_set_padding().
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*
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* \note Compared to its counterpart, this function:
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* - does not check the padding setting of \p ctx.
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* - allows the hash_id of \p ctx to be MBEDTLS_MD_NONE,
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* in which case it uses \p md_alg as the hash_id.
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*
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* \note Refer to \c mbedtls_rsa_rsassa_pss_sign() for a description
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* of the functioning and parameters of this function.
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*/
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int mbedtls_rsa_rsassa_pss_sign_no_mode_check(mbedtls_rsa_context *ctx,
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int (*f_rng)(void *, unsigned char *, size_t),
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void *p_rng,
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mbedtls_md_type_t md_alg,
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unsigned int hashlen,
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const unsigned char *hash,
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unsigned char *sig);
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#endif /* MBEDTLS_PKCS1_V21 */
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#endif /* rsa_internal.h */
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