refactor: Finish support and testing for mbedtls

1 files changed, 0 insertions, 1152 deletions

diff --git a/vendor/mbedtls/rsa.h b/vendor/mbedtls/rsa.h
deleted file mode 100644
index be831f1..0000000
--- a/vendor/mbedtls/rsa.h
+++ /dev/null
@@ -1,1152 +0,0 @@
-/**
- * \file rsa.h
- *
- * \brief This file provides an API for the RSA public-key cryptosystem.
- *
- * The RSA public-key cryptosystem is defined in <em>Public-Key
- * Cryptography Standards (PKCS) #1 v1.5: RSA Encryption</em>
- * and <em>Public-Key Cryptography Standards (PKCS) #1 v2.1:
- * RSA Cryptography Specifications</em>.
- *
- */
-/*
- *  Copyright The Mbed TLS Contributors
- *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
- */
-#ifndef MBEDTLS_RSA_H
-#define MBEDTLS_RSA_H
-#include "mbedtls/private_access.h"
-
-#include "mbedtls/build_info.h"
-
-#include "mbedtls/bignum.h"
-#include "mbedtls/md.h"
-
-#if defined(MBEDTLS_THREADING_C)
-#include "mbedtls/threading.h"
-#endif
-
-/*
- * RSA Error codes
- */
-/** Bad input parameters to function. */
-#define MBEDTLS_ERR_RSA_BAD_INPUT_DATA                    -0x4080
-/** Input data contains invalid padding and is rejected. */
-#define MBEDTLS_ERR_RSA_INVALID_PADDING                   -0x4100
-/** Something failed during generation of a key. */
-#define MBEDTLS_ERR_RSA_KEY_GEN_FAILED                    -0x4180
-/** Key failed to pass the validity check of the library. */
-#define MBEDTLS_ERR_RSA_KEY_CHECK_FAILED                  -0x4200
-/** The public key operation failed. */
-#define MBEDTLS_ERR_RSA_PUBLIC_FAILED                     -0x4280
-/** The private key operation failed. */
-#define MBEDTLS_ERR_RSA_PRIVATE_FAILED                    -0x4300
-/** The PKCS#1 verification failed. */
-#define MBEDTLS_ERR_RSA_VERIFY_FAILED                     -0x4380
-/** The output buffer for decryption is not large enough. */
-#define MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE                  -0x4400
-/** The random generator failed to generate non-zeros. */
-#define MBEDTLS_ERR_RSA_RNG_FAILED                        -0x4480
-
-/*
- * RSA constants
- */
-
-#define MBEDTLS_RSA_PKCS_V15    0 /**< Use PKCS#1 v1.5 encoding. */
-#define MBEDTLS_RSA_PKCS_V21    1 /**< Use PKCS#1 v2.1 encoding. */
-
-#define MBEDTLS_RSA_SIGN        1 /**< Identifier for RSA signature operations. */
-#define MBEDTLS_RSA_CRYPT       2 /**< Identifier for RSA encryption and decryption operations. */
-
-#define MBEDTLS_RSA_SALT_LEN_ANY    -1
-
-/*
- * The above constants may be used even if the RSA module is compile out,
- * eg for alternative (PKCS#11) RSA implementations in the PK layers.
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(MBEDTLS_RSA_ALT)
-// Regular implementation
-//
-
-#if !defined(MBEDTLS_RSA_GEN_KEY_MIN_BITS)
-#define MBEDTLS_RSA_GEN_KEY_MIN_BITS 1024
-#elif MBEDTLS_RSA_GEN_KEY_MIN_BITS < 128
-#error "MBEDTLS_RSA_GEN_KEY_MIN_BITS must be at least 128 bits"
-#endif
-
-/**
- * \brief   The RSA context structure.
- */
-typedef struct mbedtls_rsa_context {
-    int MBEDTLS_PRIVATE(ver);                    /*!<  Reserved for internal purposes.
-                                                  *    Do not set this field in application
-                                                  *    code. Its meaning might change without
-                                                  *    notice. */
-    size_t MBEDTLS_PRIVATE(len);                 /*!<  The size of \p N in Bytes. */
-
-    mbedtls_mpi MBEDTLS_PRIVATE(N);              /*!<  The public modulus. */
-    mbedtls_mpi MBEDTLS_PRIVATE(E);              /*!<  The public exponent. */
-
-    mbedtls_mpi MBEDTLS_PRIVATE(D);              /*!<  The private exponent. */
-    mbedtls_mpi MBEDTLS_PRIVATE(P);              /*!<  The first prime factor. */
-    mbedtls_mpi MBEDTLS_PRIVATE(Q);              /*!<  The second prime factor. */
-
-    mbedtls_mpi MBEDTLS_PRIVATE(DP);             /*!<  <code>D % (P - 1)</code>. */
-    mbedtls_mpi MBEDTLS_PRIVATE(DQ);             /*!<  <code>D % (Q - 1)</code>. */
-    mbedtls_mpi MBEDTLS_PRIVATE(QP);             /*!<  <code>1 / (Q % P)</code>. */
-
-    mbedtls_mpi MBEDTLS_PRIVATE(RN);             /*!<  cached <code>R^2 mod N</code>. */
-
-    mbedtls_mpi MBEDTLS_PRIVATE(RP);             /*!<  cached <code>R^2 mod P</code>. */
-    mbedtls_mpi MBEDTLS_PRIVATE(RQ);             /*!<  cached <code>R^2 mod Q</code>. */
-
-    mbedtls_mpi MBEDTLS_PRIVATE(Vi);             /*!<  The cached blinding value. */
-    mbedtls_mpi MBEDTLS_PRIVATE(Vf);             /*!<  The cached un-blinding value. */
-
-    int MBEDTLS_PRIVATE(padding);                /*!< Selects padding mode:
-                                                  #MBEDTLS_RSA_PKCS_V15 for 1.5 padding and
-                                                  #MBEDTLS_RSA_PKCS_V21 for OAEP or PSS. */
-    int MBEDTLS_PRIVATE(hash_id);                /*!< Hash identifier of mbedtls_md_type_t type,
-                                                    as specified in md.h for use in the MGF
-                                                    mask generating function used in the
-                                                    EME-OAEP and EMSA-PSS encodings. */
-#if defined(MBEDTLS_THREADING_C)
-    /* Invariant: the mutex is initialized iff ver != 0. */
-    mbedtls_threading_mutex_t MBEDTLS_PRIVATE(mutex);    /*!<  Thread-safety mutex. */
-#endif
-}
-mbedtls_rsa_context;
-
-#else  /* MBEDTLS_RSA_ALT */
-#include "rsa_alt.h"
-#endif /* MBEDTLS_RSA_ALT */
-
-/**
- * \brief          This function initializes an RSA context.
- *
- * \note           This function initializes the padding and the hash
- *                 identifier to respectively #MBEDTLS_RSA_PKCS_V15 and
- *                 #MBEDTLS_MD_NONE. See mbedtls_rsa_set_padding() for more
- *                 information about those parameters.
- *
- * \param ctx      The RSA context to initialize. This must not be \c NULL.
- */
-void mbedtls_rsa_init(mbedtls_rsa_context *ctx);
-
-/**
- * \brief          This function sets padding for an already initialized RSA
- *                 context.
- *
- * \note           Set padding to #MBEDTLS_RSA_PKCS_V21 for the RSAES-OAEP
- *                 encryption scheme and the RSASSA-PSS signature scheme.
- *
- * \note           The \p hash_id parameter is ignored when using
- *                 #MBEDTLS_RSA_PKCS_V15 padding.
- *
- * \note           The choice of padding mode is strictly enforced for private
- *                 key operations, since there might be security concerns in
- *                 mixing padding modes. For public key operations it is
- *                 a default value, which can be overridden by calling specific
- *                 \c mbedtls_rsa_rsaes_xxx or \c mbedtls_rsa_rsassa_xxx
- *                 functions.
- *
- * \note           The hash selected in \p hash_id is always used for OEAP
- *                 encryption. For PSS signatures, it is always used for
- *                 making signatures, but can be overridden for verifying them.
- *                 If set to #MBEDTLS_MD_NONE, it is always overridden.
- *
- * \param ctx      The initialized RSA context to be configured.
- * \param padding  The padding mode to use. This must be either
- *                 #MBEDTLS_RSA_PKCS_V15 or #MBEDTLS_RSA_PKCS_V21.
- * \param hash_id  The hash identifier for PSS or OAEP, if \p padding is
- *                 #MBEDTLS_RSA_PKCS_V21. #MBEDTLS_MD_NONE is accepted by this
- *                 function but may be not suitable for some operations.
- *                 Ignored if \p padding is #MBEDTLS_RSA_PKCS_V15.
- *
- * \return         \c 0 on success.
- * \return         #MBEDTLS_ERR_RSA_INVALID_PADDING failure:
- *                 \p padding or \p hash_id is invalid.
- */
-int mbedtls_rsa_set_padding(mbedtls_rsa_context *ctx, int padding,
-                            mbedtls_md_type_t hash_id);
-
-/**
- * \brief          This function retrieves padding mode of initialized
- *                 RSA context.
- *
- * \param ctx      The initialized RSA context.
- *
- * \return         RSA padding mode.
- *
- */
-int mbedtls_rsa_get_padding_mode(const mbedtls_rsa_context *ctx);
-
-/**
- * \brief          This function retrieves hash identifier of mbedtls_md_type_t
- *                 type.
- *
- * \param ctx      The initialized RSA context.
- *
- * \return         Hash identifier of mbedtls_md_type_t type.
- *
- */
-int mbedtls_rsa_get_md_alg(const mbedtls_rsa_context *ctx);
-
-/**
- * \brief          This function imports a set of core parameters into an
- *                 RSA context.
- *
- * \note           This function can be called multiple times for successive
- *                 imports, if the parameters are not simultaneously present.
- *
- *                 Any sequence of calls to this function should be followed
- *                 by a call to mbedtls_rsa_complete(), which checks and
- *                 completes the provided information to a ready-for-use
- *                 public or private RSA key.
- *
- * \note           See mbedtls_rsa_complete() for more information on which
- *                 parameters are necessary to set up a private or public
- *                 RSA key.
- *
- * \note           The imported parameters are copied and need not be preserved
- *                 for the lifetime of the RSA context being set up.
- *
- * \param ctx      The initialized RSA context to store the parameters in.
- * \param N        The RSA modulus. This may be \c NULL.
- * \param P        The first prime factor of \p N. This may be \c NULL.
- * \param Q        The second prime factor of \p N. This may be \c NULL.
- * \param D        The private exponent. This may be \c NULL.
- * \param E        The public exponent. This may be \c NULL.
- *
- * \return         \c 0 on success.
- * \return         A non-zero error code on failure.
- */
-int mbedtls_rsa_import(mbedtls_rsa_context *ctx,
-                       const mbedtls_mpi *N,
-                       const mbedtls_mpi *P, const mbedtls_mpi *Q,
-                       const mbedtls_mpi *D, const mbedtls_mpi *E);
-
-/**
- * \brief          This function imports core RSA parameters, in raw big-endian
- *                 binary format, into an RSA context.
- *
- * \note           This function can be called multiple times for successive
- *                 imports, if the parameters are not simultaneously present.
- *
- *                 Any sequence of calls to this function should be followed
- *                 by a call to mbedtls_rsa_complete(), which checks and
- *                 completes the provided information to a ready-for-use
- *                 public or private RSA key.
- *
- * \note           See mbedtls_rsa_complete() for more information on which
- *                 parameters are necessary to set up a private or public
- *                 RSA key.
- *
- * \note           The imported parameters are copied and need not be preserved
- *                 for the lifetime of the RSA context being set up.
- *
- * \param ctx      The initialized RSA context to store the parameters in.
- * \param N        The RSA modulus. This may be \c NULL.
- * \param N_len    The Byte length of \p N; it is ignored if \p N == NULL.
- * \param P        The first prime factor of \p N. This may be \c NULL.
- * \param P_len    The Byte length of \p P; it is ignored if \p P == NULL.
- * \param Q        The second prime factor of \p N. This may be \c NULL.
- * \param Q_len    The Byte length of \p Q; it is ignored if \p Q == NULL.
- * \param D        The private exponent. This may be \c NULL.
- * \param D_len    The Byte length of \p D; it is ignored if \p D == NULL.
- * \param E        The public exponent. This may be \c NULL.
- * \param E_len    The Byte length of \p E; it is ignored if \p E == NULL.
- *
- * \return         \c 0 on success.
- * \return         A non-zero error code on failure.
- */
-int mbedtls_rsa_import_raw(mbedtls_rsa_context *ctx,
-                           unsigned char const *N, size_t N_len,
-                           unsigned char const *P, size_t P_len,
-                           unsigned char const *Q, size_t Q_len,
-                           unsigned char const *D, size_t D_len,
-                           unsigned char const *E, size_t E_len);
-
-/**
- * \brief          This function completes an RSA context from
- *                 a set of imported core parameters.
- *
- *                 To setup an RSA public key, precisely \c N and \c E
- *                 must have been imported.
- *
- *                 To setup an RSA private key, sufficient information must
- *                 be present for the other parameters to be derivable.
- *
- *                 The default implementation supports the following:
- *                 <ul><li>Derive \c P, \c Q from \c N, \c D, \c E.</li>
- *                 <li>Derive \c N, \c D from \c P, \c Q, \c E.</li></ul>
- *                 Alternative implementations need not support these.
- *
- *                 If this function runs successfully, it guarantees that
- *                 the RSA context can be used for RSA operations without
- *                 the risk of failure or crash.
- *
- * \warning        This function need not perform consistency checks
- *                 for the imported parameters. In particular, parameters that
- *                 are not needed by the implementation might be silently
- *                 discarded and left unchecked. To check the consistency
- *                 of the key material, see mbedtls_rsa_check_privkey().
- *
- * \param ctx      The initialized RSA context holding imported parameters.
- *
- * \return         \c 0 on success.
- * \return         #MBEDTLS_ERR_RSA_BAD_INPUT_DATA if the attempted derivations
- *                 failed.
- *
- */
-int mbedtls_rsa_complete(mbedtls_rsa_context *ctx);
-
-/**
- * \brief          This function exports the core parameters of an RSA key.
- *
- *                 If this function runs successfully, the non-NULL buffers
- *                 pointed to by \p N, \p P, \p Q, \p D, and \p E are fully
- *                 written, with additional unused space filled leading by
- *                 zero Bytes.
- *
- *                 Possible reasons for returning
- *                 #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED:<ul>
- *                 <li>An alternative RSA implementation is in use, which
- *                 stores the key externally, and either cannot or should
- *                 not export it into RAM.</li>
- *                 <li>A SW or HW implementation might not support a certain
- *                 deduction. For example, \p P, \p Q from \p N, \p D,
- *                 and \p E if the former are not part of the
- *                 implementation.</li></ul>
- *
- *                 If the function fails due to an unsupported operation,
- *                 the RSA context stays intact and remains usable.
- *
- * \param ctx      The initialized RSA context.
- * \param N        The MPI to hold the RSA modulus.
- *                 This may be \c NULL if this field need not be exported.
- * \param P        The MPI to hold the first prime factor of \p N.
- *                 This may be \c NULL if this field need not be exported.
- * \param Q        The MPI to hold the second prime factor of \p N.
- *                 This may be \c NULL if this field need not be exported.
- * \param D        The MPI to hold the private exponent.
- *                 This may be \c NULL if this field need not be exported.
- * \param E        The MPI to hold the public exponent.
- *                 This may be \c NULL if this field need not be exported.
- *
- * \return         \c 0 on success.
- * \return         #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED if exporting the
- *                 requested parameters cannot be done due to missing
- *                 functionality or because of security policies.
- * \return         A non-zero return code on any other failure.
- *
- */
-int mbedtls_rsa_export(const mbedtls_rsa_context *ctx,
-                       mbedtls_mpi *N, mbedtls_mpi *P, mbedtls_mpi *Q,
-                       mbedtls_mpi *D, mbedtls_mpi *E);
-
-/**
- * \brief          This function exports core parameters of an RSA key
- *                 in raw big-endian binary format.
- *
- *                 If this function runs successfully, the non-NULL buffers
- *                 pointed to by \p N, \p P, \p Q, \p D, and \p E are fully
- *                 written, with additional unused space filled leading by
- *                 zero Bytes.
- *
- *                 Possible reasons for returning
- *                 #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED:<ul>
- *                 <li>An alternative RSA implementation is in use, which
- *                 stores the key externally, and either cannot or should
- *                 not export it into RAM.</li>
- *                 <li>A SW or HW implementation might not support a certain
- *                 deduction. For example, \p P, \p Q from \p N, \p D,
- *                 and \p E if the former are not part of the
- *                 implementation.</li></ul>
- *                 If the function fails due to an unsupported operation,
- *                 the RSA context stays intact and remains usable.
- *
- * \note           The length parameters are ignored if the corresponding
- *                 buffer pointers are NULL.
- *
- * \param ctx      The initialized RSA context.
- * \param N        The Byte array to store the RSA modulus,
- *                 or \c NULL if this field need not be exported.
- * \param N_len    The size of the buffer for the modulus.
- * \param P        The Byte array to hold the first prime factor of \p N,
- *                 or \c NULL if this field need not be exported.
- * \param P_len    The size of the buffer for the first prime factor.
- * \param Q        The Byte array to hold the second prime factor of \p N,
- *                 or \c NULL if this field need not be exported.
- * \param Q_len    The size of the buffer for the second prime factor.
- * \param D        The Byte array to hold the private exponent,
- *                 or \c NULL if this field need not be exported.
- * \param D_len    The size of the buffer for the private exponent.
- * \param E        The Byte array to hold the public exponent,
- *                 or \c NULL if this field need not be exported.
- * \param E_len    The size of the buffer for the public exponent.
- *
- * \return         \c 0 on success.
- * \return         #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED if exporting the
- *                 requested parameters cannot be done due to missing
- *                 functionality or because of security policies.
- * \return         A non-zero return code on any other failure.
- */
-int mbedtls_rsa_export_raw(const mbedtls_rsa_context *ctx,
-                           unsigned char *N, size_t N_len,
-                           unsigned char *P, size_t P_len,
-                           unsigned char *Q, size_t Q_len,
-                           unsigned char *D, size_t D_len,
-                           unsigned char *E, size_t E_len);
-
-/**
- * \brief          This function exports CRT parameters of a private RSA key.
- *
- * \note           Alternative RSA implementations not using CRT-parameters
- *                 internally can implement this function based on
- *                 mbedtls_rsa_deduce_opt().
- *
- * \param ctx      The initialized RSA context.
- * \param DP       The MPI to hold \c D modulo `P-1`,
- *                 or \c NULL if it need not be exported.
- * \param DQ       The MPI to hold \c D modulo `Q-1`,
- *                 or \c NULL if it need not be exported.
- * \param QP       The MPI to hold modular inverse of \c Q modulo \c P,
- *                 or \c NULL if it need not be exported.
- *
- * \return         \c 0 on success.
- * \return         A non-zero error code on failure.
- *
- */
-int mbedtls_rsa_export_crt(const mbedtls_rsa_context *ctx,
-                           mbedtls_mpi *DP, mbedtls_mpi *DQ, mbedtls_mpi *QP);
-
-/**
- * \brief          This function retrieves the length of RSA modulus in Bytes.
- *
- * \param ctx      The initialized RSA context.
- *
- * \return         The length of the RSA modulus in Bytes.
- *
- */
-size_t mbedtls_rsa_get_len(const mbedtls_rsa_context *ctx);
-
-/**
- * \brief          This function generates an RSA keypair.
- *
- * \note           mbedtls_rsa_init() must be called before this function,
- *                 to set up the RSA context.
- *
- * \param ctx      The initialized RSA context used to hold the key.
- * \param f_rng    The RNG function to be used for key generation.
- *                 This is mandatory and must not be \c NULL.
- * \param p_rng    The RNG context to be passed to \p f_rng.
- *                 This may be \c NULL if \p f_rng doesn't need a context.
- * \param nbits    The size of the public key in bits.
- * \param exponent The public exponent to use. For example, \c 65537.
- *                 This must be odd and greater than \c 1.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_gen_key(mbedtls_rsa_context *ctx,
-                        int (*f_rng)(void *, unsigned char *, size_t),
-                        void *p_rng,
-                        unsigned int nbits, int exponent);
-
-/**
- * \brief          This function checks if a context contains at least an RSA
- *                 public key.
- *
- *                 If the function runs successfully, it is guaranteed that
- *                 enough information is present to perform an RSA public key
- *                 operation using mbedtls_rsa_public().
- *
- * \param ctx      The initialized RSA context to check.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- *
- */
-int mbedtls_rsa_check_pubkey(const mbedtls_rsa_context *ctx);
-
-/**
- * \brief      This function checks if a context contains an RSA private key
- *             and perform basic consistency checks.
- *
- * \note       The consistency checks performed by this function not only
- *             ensure that mbedtls_rsa_private() can be called successfully
- *             on the given context, but that the various parameters are
- *             mutually consistent with high probability, in the sense that
- *             mbedtls_rsa_public() and mbedtls_rsa_private() are inverses.
- *
- * \warning    This function should catch accidental misconfigurations
- *             like swapping of parameters, but it cannot establish full
- *             trust in neither the quality nor the consistency of the key
- *             material that was used to setup the given RSA context:
- *             <ul><li>Consistency: Imported parameters that are irrelevant
- *             for the implementation might be silently dropped. If dropped,
- *             the current function does not have access to them,
- *             and therefore cannot check them. See mbedtls_rsa_complete().
- *             If you want to check the consistency of the entire
- *             content of a PKCS1-encoded RSA private key, for example, you
- *             should use mbedtls_rsa_validate_params() before setting
- *             up the RSA context.
- *             Additionally, if the implementation performs empirical checks,
- *             these checks substantiate but do not guarantee consistency.</li>
- *             <li>Quality: This function is not expected to perform
- *             extended quality assessments like checking that the prime
- *             factors are safe. Additionally, it is the responsibility of the
- *             user to ensure the trustworthiness of the source of his RSA
- *             parameters, which goes beyond what is effectively checkable
- *             by the library.</li></ul>
- *
- * \param ctx  The initialized RSA context to check.
- *
- * \return     \c 0 on success.
- * \return     An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_check_privkey(const mbedtls_rsa_context *ctx);
-
-/**
- * \brief          This function checks a public-private RSA key pair.
- *
- *                 It checks each of the contexts, and makes sure they match.
- *
- * \param pub      The initialized RSA context holding the public key.
- * \param prv      The initialized RSA context holding the private key.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_check_pub_priv(const mbedtls_rsa_context *pub,
-                               const mbedtls_rsa_context *prv);
-
-/**
- * \brief          This function performs an RSA public key operation.
- *
- * \param ctx      The initialized RSA context to use.
- * \param input    The input buffer. This must be a readable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- * \param output   The output buffer. This must be a writable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \note           This function does not handle message padding.
- *
- * \note           Make sure to set \p input[0] = 0 or ensure that
- *                 input is smaller than \c N.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_public(mbedtls_rsa_context *ctx,
-                       const unsigned char *input,
-                       unsigned char *output);
-
-/**
- * \brief          This function performs an RSA private key operation.
- *
- * \note           Blinding is used if and only if a PRNG is provided.
- *
- * \note           If blinding is used, both the base of exponentiation
- *                 and the exponent are blinded, providing protection
- *                 against some side-channel attacks.
- *
- * \warning        It is deprecated and a security risk to not provide
- *                 a PRNG here and thereby prevent the use of blinding.
- *                 Future versions of the library may enforce the presence
- *                 of a PRNG.
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function, used for blinding. It is mandatory.
- * \param p_rng    The RNG context to pass to \p f_rng. This may be \c NULL
- *                 if \p f_rng doesn't need a context.
- * \param input    The input buffer. This must be a readable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- * \param output   The output buffer. This must be a writable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- *
- */
-int mbedtls_rsa_private(mbedtls_rsa_context *ctx,
-                        int (*f_rng)(void *, unsigned char *, size_t),
-                        void *p_rng,
-                        const unsigned char *input,
-                        unsigned char *output);
-
-/**
- * \brief          This function adds the message padding, then performs an RSA
- *                 operation.
- *
- *                 It is the generic wrapper for performing a PKCS#1 encryption
- *                 operation.
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG to use. It is used for padding generation
- *                 and it is mandatory.
- * \param p_rng    The RNG context to be passed to \p f_rng. May be
- *                 \c NULL if \p f_rng doesn't need a context argument.
- * \param ilen     The length of the plaintext in Bytes.
- * \param input    The input data to encrypt. This must be a readable
- *                 buffer of size \p ilen Bytes. It may be \c NULL if
- *                 `ilen == 0`.
- * \param output   The output buffer. This must be a writable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_pkcs1_encrypt(mbedtls_rsa_context *ctx,
-                              int (*f_rng)(void *, unsigned char *, size_t),
-                              void *p_rng,
-                              size_t ilen,
-                              const unsigned char *input,
-                              unsigned char *output);
-
-/**
- * \brief          This function performs a PKCS#1 v1.5 encryption operation
- *                 (RSAES-PKCS1-v1_5-ENCRYPT).
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function to use. It is mandatory and used for
- *                 padding generation.
- * \param p_rng    The RNG context to be passed to \p f_rng. This may
- *                 be \c NULL if \p f_rng doesn't need a context argument.
- * \param ilen     The length of the plaintext in Bytes.
- * \param input    The input data to encrypt. This must be a readable
- *                 buffer of size \p ilen Bytes. It may be \c NULL if
- *                 `ilen == 0`.
- * \param output   The output buffer. This must be a writable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsaes_pkcs1_v15_encrypt(mbedtls_rsa_context *ctx,
-                                        int (*f_rng)(void *, unsigned char *, size_t),
-                                        void *p_rng,
-                                        size_t ilen,
-                                        const unsigned char *input,
-                                        unsigned char *output);
-
-/**
- * \brief            This function performs a PKCS#1 v2.1 OAEP encryption
- *                   operation (RSAES-OAEP-ENCRYPT).
- *
- * \note             The output buffer must be as large as the size
- *                   of ctx->N. For example, 128 Bytes if RSA-1024 is used.
- *
- * \param ctx        The initialized RSA context to use.
- * \param f_rng      The RNG function to use. This is needed for padding
- *                   generation and is mandatory.
- * \param p_rng      The RNG context to be passed to \p f_rng. This may
- *                   be \c NULL if \p f_rng doesn't need a context argument.
- * \param label      The buffer holding the custom label to use.
- *                   This must be a readable buffer of length \p label_len
- *                   Bytes. It may be \c NULL if \p label_len is \c 0.
- * \param label_len  The length of the label in Bytes.
- * \param ilen       The length of the plaintext buffer \p input in Bytes.
- * \param input      The input data to encrypt. This must be a readable
- *                   buffer of size \p ilen Bytes. It may be \c NULL if
- *                   `ilen == 0`.
- * \param output     The output buffer. This must be a writable buffer
- *                   of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                   for an 2048-bit RSA modulus.
- *
- * \return           \c 0 on success.
- * \return           An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsaes_oaep_encrypt(mbedtls_rsa_context *ctx,
-                                   int (*f_rng)(void *, unsigned char *, size_t),
-                                   void *p_rng,
-                                   const unsigned char *label, size_t label_len,
-                                   size_t ilen,
-                                   const unsigned char *input,
-                                   unsigned char *output);
-
-/**
- * \brief          This function performs an RSA operation, then removes the
- *                 message padding.
- *
- *                 It is the generic wrapper for performing a PKCS#1 decryption
- *                 operation.
- *
- * \warning        When \p ctx->padding is set to #MBEDTLS_RSA_PKCS_V15,
- *                 mbedtls_rsa_rsaes_pkcs1_v15_decrypt() is called, which is an
- *                 inherently dangerous function (CWE-242).
- *
- * \note           The output buffer length \c output_max_len should be
- *                 as large as the size \p ctx->len of \p ctx->N (for example,
- *                 128 Bytes if RSA-1024 is used) to be able to hold an
- *                 arbitrary decrypted message. If it is not large enough to
- *                 hold the decryption of the particular ciphertext provided,
- *                 the function returns \c MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function. This is used for blinding and is
- *                 mandatory; see mbedtls_rsa_private() for more.
- * \param p_rng    The RNG context to be passed to \p f_rng. This may be
- *                 \c NULL if \p f_rng doesn't need a context.
- * \param olen     The address at which to store the length of
- *                 the plaintext. This must not be \c NULL.
- * \param input    The ciphertext buffer. This must be a readable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- * \param output   The buffer used to hold the plaintext. This must
- *                 be a writable buffer of length \p output_max_len Bytes.
- * \param output_max_len The length in Bytes of the output buffer \p output.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_pkcs1_decrypt(mbedtls_rsa_context *ctx,
-                              int (*f_rng)(void *, unsigned char *, size_t),
-                              void *p_rng,
-                              size_t *olen,
-                              const unsigned char *input,
-                              unsigned char *output,
-                              size_t output_max_len);
-
-/**
- * \brief          This function performs a PKCS#1 v1.5 decryption
- *                 operation (RSAES-PKCS1-v1_5-DECRYPT).
- *
- * \warning        This is an inherently dangerous function (CWE-242). Unless
- *                 it is used in a side channel free and safe way (eg.
- *                 implementing the TLS protocol as per 7.4.7.1 of RFC 5246),
- *                 the calling code is vulnerable.
- *
- * \note           The output buffer length \c output_max_len should be
- *                 as large as the size \p ctx->len of \p ctx->N, for example,
- *                 128 Bytes if RSA-1024 is used, to be able to hold an
- *                 arbitrary decrypted message. If it is not large enough to
- *                 hold the decryption of the particular ciphertext provided,
- *                 the function returns #MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function. This is used for blinding and is
- *                 mandatory; see mbedtls_rsa_private() for more.
- * \param p_rng    The RNG context to be passed to \p f_rng. This may be
- *                 \c NULL if \p f_rng doesn't need a context.
- * \param olen     The address at which to store the length of
- *                 the plaintext. This must not be \c NULL.
- * \param input    The ciphertext buffer. This must be a readable buffer
- *                 of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- * \param output   The buffer used to hold the plaintext. This must
- *                 be a writable buffer of length \p output_max_len Bytes.
- * \param output_max_len The length in Bytes of the output buffer \p output.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- *
- */
-int mbedtls_rsa_rsaes_pkcs1_v15_decrypt(mbedtls_rsa_context *ctx,
-                                        int (*f_rng)(void *, unsigned char *, size_t),
-                                        void *p_rng,
-                                        size_t *olen,
-                                        const unsigned char *input,
-                                        unsigned char *output,
-                                        size_t output_max_len);
-
-/**
- * \brief            This function performs a PKCS#1 v2.1 OAEP decryption
- *                   operation (RSAES-OAEP-DECRYPT).
- *
- * \note             The output buffer length \c output_max_len should be
- *                   as large as the size \p ctx->len of \p ctx->N, for
- *                   example, 128 Bytes if RSA-1024 is used, to be able to
- *                   hold an arbitrary decrypted message. If it is not
- *                   large enough to hold the decryption of the particular
- *                   ciphertext provided, the function returns
- *                   #MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
- *
- * \param ctx        The initialized RSA context to use.
- * \param f_rng      The RNG function. This is used for blinding and is
- *                   mandatory.
- * \param p_rng      The RNG context to be passed to \p f_rng. This may be
- *                   \c NULL if \p f_rng doesn't need a context.
- * \param label      The buffer holding the custom label to use.
- *                   This must be a readable buffer of length \p label_len
- *                   Bytes. It may be \c NULL if \p label_len is \c 0.
- * \param label_len  The length of the label in Bytes.
- * \param olen       The address at which to store the length of
- *                   the plaintext. This must not be \c NULL.
- * \param input      The ciphertext buffer. This must be a readable buffer
- *                   of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                   for an 2048-bit RSA modulus.
- * \param output     The buffer used to hold the plaintext. This must
- *                   be a writable buffer of length \p output_max_len Bytes.
- * \param output_max_len The length in Bytes of the output buffer \p output.
- *
- * \return         \c 0 on success.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsaes_oaep_decrypt(mbedtls_rsa_context *ctx,
-                                   int (*f_rng)(void *, unsigned char *, size_t),
-                                   void *p_rng,
-                                   const unsigned char *label, size_t label_len,
-                                   size_t *olen,
-                                   const unsigned char *input,
-                                   unsigned char *output,
-                                   size_t output_max_len);
-
-/**
- * \brief          This function performs a private RSA operation to sign
- *                 a message digest using PKCS#1.
- *
- *                 It is the generic wrapper for performing a PKCS#1
- *                 signature.
- *
- * \note           The \p sig buffer must be as large as the size
- *                 of \p ctx->N. For example, 128 Bytes if RSA-1024 is used.
- *
- * \note           For PKCS#1 v2.1 encoding, see comments on
- *                 mbedtls_rsa_rsassa_pss_sign() for details on
- *                 \p md_alg and \p hash_id.
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function to use. This is mandatory and
- *                 must not be \c NULL.
- * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
- *                 if \p f_rng doesn't need a context argument.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param sig      The buffer to hold the signature. This must be a writable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus. A buffer length of
- *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
- *
- * \return         \c 0 if the signing operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_pkcs1_sign(mbedtls_rsa_context *ctx,
-                           int (*f_rng)(void *, unsigned char *, size_t),
-                           void *p_rng,
-                           mbedtls_md_type_t md_alg,
-                           unsigned int hashlen,
-                           const unsigned char *hash,
-                           unsigned char *sig);
-
-/**
- * \brief          This function performs a PKCS#1 v1.5 signature
- *                 operation (RSASSA-PKCS1-v1_5-SIGN).
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function. This is used for blinding and is
- *                 mandatory; see mbedtls_rsa_private() for more.
- * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
- *                 if \p f_rng doesn't need a context argument.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param sig      The buffer to hold the signature. This must be a writable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus. A buffer length of
- *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
- *
- * \return         \c 0 if the signing operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsassa_pkcs1_v15_sign(mbedtls_rsa_context *ctx,
-                                      int (*f_rng)(void *, unsigned char *, size_t),
-                                      void *p_rng,
-                                      mbedtls_md_type_t md_alg,
-                                      unsigned int hashlen,
-                                      const unsigned char *hash,
-                                      unsigned char *sig);
-
-/**
- * \brief          This function performs a PKCS#1 v2.1 PSS signature
- *                 operation (RSASSA-PSS-SIGN).
- *
- * \note           The \c hash_id set in \p ctx by calling
- *                 mbedtls_rsa_set_padding() selects the hash used for the
- *                 encoding operation and for the mask generation function
- *                 (MGF1). For more details on the encoding operation and the
- *                 mask generation function, consult <em>RFC-3447: Public-Key
- *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
- *                 Specifications</em>.
- *
- * \note           This function enforces that the provided salt length complies
- *                 with FIPS 186-4 §5.5 (e) and RFC 8017 (PKCS#1 v2.2) §9.1.1
- *                 step 3. The constraint is that the hash length plus the salt
- *                 length plus 2 bytes must be at most the key length. If this
- *                 constraint is not met, this function returns
- *                 #MBEDTLS_ERR_RSA_BAD_INPUT_DATA.
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function. It is mandatory and must not be \c NULL.
- * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
- *                 if \p f_rng doesn't need a context argument.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param saltlen  The length of the salt that should be used.
- *                 If passed #MBEDTLS_RSA_SALT_LEN_ANY, the function will use
- *                 the largest possible salt length up to the hash length,
- *                 which is the largest permitted by some standards including
- *                 FIPS 186-4 §5.5.
- * \param sig      The buffer to hold the signature. This must be a writable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus. A buffer length of
- *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
- *
- * \return         \c 0 if the signing operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsassa_pss_sign_ext(mbedtls_rsa_context *ctx,
-                                    int (*f_rng)(void *, unsigned char *, size_t),
-                                    void *p_rng,
-                                    mbedtls_md_type_t md_alg,
-                                    unsigned int hashlen,
-                                    const unsigned char *hash,
-                                    int saltlen,
-                                    unsigned char *sig);
-
-/**
- * \brief          This function performs a PKCS#1 v2.1 PSS signature
- *                 operation (RSASSA-PSS-SIGN).
- *
- * \note           The \c hash_id set in \p ctx by calling
- *                 mbedtls_rsa_set_padding() selects the hash used for the
- *                 encoding operation and for the mask generation function
- *                 (MGF1). For more details on the encoding operation and the
- *                 mask generation function, consult <em>RFC-3447: Public-Key
- *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
- *                 Specifications</em>.
- *
- * \note           This function always uses the maximum possible salt size,
- *                 up to the length of the payload hash. This choice of salt
- *                 size complies with FIPS 186-4 §5.5 (e) and RFC 8017 (PKCS#1
- *                 v2.2) §9.1.1 step 3. Furthermore this function enforces a
- *                 minimum salt size which is the hash size minus 2 bytes. If
- *                 this minimum size is too large given the key size (the salt
- *                 size, plus the hash size, plus 2 bytes must be no more than
- *                 the key size in bytes), this function returns
- *                 #MBEDTLS_ERR_RSA_BAD_INPUT_DATA.
- *
- * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function. It is mandatory and must not be \c NULL.
- * \param p_rng    The RNG context to be passed to \p f_rng. This may be \c NULL
- *                 if \p f_rng doesn't need a context argument.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param sig      The buffer to hold the signature. This must be a writable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus. A buffer length of
- *                 #MBEDTLS_MPI_MAX_SIZE is always safe.
- *
- * \return         \c 0 if the signing operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsassa_pss_sign(mbedtls_rsa_context *ctx,
-                                int (*f_rng)(void *, unsigned char *, size_t),
-                                void *p_rng,
-                                mbedtls_md_type_t md_alg,
-                                unsigned int hashlen,
-                                const unsigned char *hash,
-                                unsigned char *sig);
-
-/**
- * \brief          This function performs a public RSA operation and checks
- *                 the message digest.
- *
- *                 This is the generic wrapper for performing a PKCS#1
- *                 verification.
- *
- * \note           For PKCS#1 v2.1 encoding, see comments on
- *                 mbedtls_rsa_rsassa_pss_verify() about \c md_alg and
- *                 \c hash_id.
- *
- * \param ctx      The initialized RSA public key context to use.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param sig      The buffer holding the signature. This must be a readable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \return         \c 0 if the verify operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_pkcs1_verify(mbedtls_rsa_context *ctx,
-                             mbedtls_md_type_t md_alg,
-                             unsigned int hashlen,
-                             const unsigned char *hash,
-                             const unsigned char *sig);
-
-/**
- * \brief          This function performs a PKCS#1 v1.5 verification
- *                 operation (RSASSA-PKCS1-v1_5-VERIFY).
- *
- * \param ctx      The initialized RSA public key context to use.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param sig      The buffer holding the signature. This must be a readable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \return         \c 0 if the verify operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsassa_pkcs1_v15_verify(mbedtls_rsa_context *ctx,
-                                        mbedtls_md_type_t md_alg,
-                                        unsigned int hashlen,
-                                        const unsigned char *hash,
-                                        const unsigned char *sig);
-
-/**
- * \brief          This function performs a PKCS#1 v2.1 PSS verification
- *                 operation (RSASSA-PSS-VERIFY).
- *
- * \note           The \c hash_id set in \p ctx by calling
- *                 mbedtls_rsa_set_padding() selects the hash used for the
- *                 encoding operation and for the mask generation function
- *                 (MGF1). For more details on the encoding operation and the
- *                 mask generation function, consult <em>RFC-3447: Public-Key
- *                 Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography
- *                 Specifications</em>. If the \c hash_id set in \p ctx by
- *                 mbedtls_rsa_set_padding() is #MBEDTLS_MD_NONE, the \p md_alg
- *                 parameter is used.
- *
- * \param ctx      The initialized RSA public key context to use.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param sig      The buffer holding the signature. This must be a readable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \return         \c 0 if the verify operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsassa_pss_verify(mbedtls_rsa_context *ctx,
-                                  mbedtls_md_type_t md_alg,
-                                  unsigned int hashlen,
-                                  const unsigned char *hash,
-                                  const unsigned char *sig);
-
-/**
- * \brief          This function performs a PKCS#1 v2.1 PSS verification
- *                 operation (RSASSA-PSS-VERIFY).
- *
- * \note           The \p sig buffer must be as large as the size
- *                 of \p ctx->N. For example, 128 Bytes if RSA-1024 is used.
- *
- * \note           The \c hash_id set in \p ctx by mbedtls_rsa_set_padding() is
- *                 ignored.
- *
- * \param ctx      The initialized RSA public key context to use.
- * \param md_alg   The message-digest algorithm used to hash the original data.
- *                 Use #MBEDTLS_MD_NONE for signing raw data.
- * \param hashlen  The length of the message digest or raw data in Bytes.
- *                 If \p md_alg is not #MBEDTLS_MD_NONE, this must match the
- *                 output length of the corresponding hash algorithm.
- * \param hash     The buffer holding the message digest or raw data.
- *                 This must be a readable buffer of at least \p hashlen Bytes.
- * \param mgf1_hash_id      The message digest algorithm used for the
- *                          verification operation and the mask generation
- *                          function (MGF1). For more details on the encoding
- *                          operation and the mask generation function, consult
- *                          <em>RFC-3447: Public-Key Cryptography Standards
- *                          (PKCS) #1 v2.1: RSA Cryptography
- *                          Specifications</em>.
- * \param expected_salt_len The length of the salt used in padding. Use
- *                          #MBEDTLS_RSA_SALT_LEN_ANY to accept any salt length.
- * \param sig      The buffer holding the signature. This must be a readable
- *                 buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
- *                 for an 2048-bit RSA modulus.
- *
- * \return         \c 0 if the verify operation was successful.
- * \return         An \c MBEDTLS_ERR_RSA_XXX error code on failure.
- */
-int mbedtls_rsa_rsassa_pss_verify_ext(mbedtls_rsa_context *ctx,
-                                      mbedtls_md_type_t md_alg,
-                                      unsigned int hashlen,
-                                      const unsigned char *hash,
-                                      mbedtls_md_type_t mgf1_hash_id,
-                                      int expected_salt_len,
-                                      const unsigned char *sig);
-
-/**
- * \brief          This function copies the components of an RSA context.
- *
- * \param dst      The destination context. This must be initialized.
- * \param src      The source context. This must be initialized.
- *
- * \return         \c 0 on success.
- * \return         #MBEDTLS_ERR_MPI_ALLOC_FAILED on memory allocation failure.
- */
-int mbedtls_rsa_copy(mbedtls_rsa_context *dst, const mbedtls_rsa_context *src);
-
-/**
- * \brief          This function frees the components of an RSA key.
- *
- * \param ctx      The RSA context to free. May be \c NULL, in which case
- *                 this function is a no-op. If it is not \c NULL, it must
- *                 point to an initialized RSA context.
- */
-void mbedtls_rsa_free(mbedtls_rsa_context *ctx);
-
-#if defined(MBEDTLS_SELF_TEST)
-
-/**
- * \brief          The RSA checkup routine.
- *
- * \return         \c 0 on success.
- * \return         \c 1 on failure.
- */
-int mbedtls_rsa_self_test(int verbose);
-
-#endif /* MBEDTLS_SELF_TEST */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* rsa.h */