| /** | |
| * \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 (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved | |
| * SPDX-License-Identifier: Apache-2.0 | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may | |
| * not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| * | |
| * This file is part of Mbed TLS (https://tls.mbed.org) | |
| */ | |
| #ifndef MBEDTLS_RSA_H | |
| #define MBEDTLS_RSA_H | |
| #if !defined(MBEDTLS_CONFIG_FILE) | |
| #include "config.h" | |
| #else | |
| #include MBEDTLS_CONFIG_FILE | |
| #endif | |
| #include "bignum.h" | |
| #include "md.h" | |
| #if defined(MBEDTLS_THREADING_C) | |
| #include "threading.h" | |
| #endif | |
| /* | |
| * RSA Error codes | |
| */ | |
| #define MBEDTLS_ERR_RSA_BAD_INPUT_DATA -0x4080 /**< Bad input parameters to function. */ | |
| #define MBEDTLS_ERR_RSA_INVALID_PADDING -0x4100 /**< Input data contains invalid padding and is rejected. */ | |
| #define MBEDTLS_ERR_RSA_KEY_GEN_FAILED -0x4180 /**< Something failed during generation of a key. */ | |
| #define MBEDTLS_ERR_RSA_KEY_CHECK_FAILED -0x4200 /**< Key failed to pass the validity check of the library. */ | |
| #define MBEDTLS_ERR_RSA_PUBLIC_FAILED -0x4280 /**< The public key operation failed. */ | |
| #define MBEDTLS_ERR_RSA_PRIVATE_FAILED -0x4300 /**< The private key operation failed. */ | |
| #define MBEDTLS_ERR_RSA_VERIFY_FAILED -0x4380 /**< The PKCS#1 verification failed. */ | |
| #define MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE -0x4400 /**< The output buffer for decryption is not large enough. */ | |
| #define MBEDTLS_ERR_RSA_RNG_FAILED -0x4480 /**< The random generator failed to generate non-zeros. */ | |
| /* MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION is deprecated and should not be used. | |
| */ | |
| #define MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION -0x4500 /**< The implementation does not offer the requested operation, for example, because of security violations or lack of functionality. */ | |
| /* MBEDTLS_ERR_RSA_HW_ACCEL_FAILED is deprecated and should not be used. */ | |
| #define MBEDTLS_ERR_RSA_HW_ACCEL_FAILED -0x4580 /**< RSA hardware accelerator failed. */ | |
| /* | |
| * RSA constants | |
| */ | |
| #define MBEDTLS_RSA_PUBLIC 0 /**< Request private key operation. */ | |
| #define MBEDTLS_RSA_PRIVATE 1 /**< Request public key operation. */ | |
| #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 implemenations in the PK layers. | |
| */ | |
| #ifdef __cplusplus | |
| extern "C" { | |
| #endif | |
| #if !defined(MBEDTLS_RSA_ALT) | |
| // Regular implementation | |
| // | |
| /** | |
| * \brief The RSA context structure. | |
| * | |
| * \note Direct manipulation of the members of this structure | |
| * is deprecated. All manipulation should instead be done through | |
| * the public interface functions. | |
| */ | |
| typedef struct mbedtls_rsa_context | |
| { | |
| int ver; /*!< Always 0.*/ | |
| size_t len; /*!< The size of \p N in Bytes. */ | |
| mbedtls_mpi N; /*!< The public modulus. */ | |
| mbedtls_mpi E; /*!< The public exponent. */ | |
| mbedtls_mpi D; /*!< The private exponent. */ | |
| mbedtls_mpi P; /*!< The first prime factor. */ | |
| mbedtls_mpi Q; /*!< The second prime factor. */ | |
| mbedtls_mpi DP; /*!< <code>D % (P - 1)</code>. */ | |
| mbedtls_mpi DQ; /*!< <code>D % (Q - 1)</code>. */ | |
| mbedtls_mpi QP; /*!< <code>1 / (Q % P)</code>. */ | |
| mbedtls_mpi RN; /*!< cached <code>R^2 mod N</code>. */ | |
| mbedtls_mpi RP; /*!< cached <code>R^2 mod P</code>. */ | |
| mbedtls_mpi RQ; /*!< cached <code>R^2 mod Q</code>. */ | |
| mbedtls_mpi Vi; /*!< The cached blinding value. */ | |
| mbedtls_mpi Vf; /*!< The cached un-blinding value. */ | |
| int padding; /*!< Selects padding mode: | |
| #MBEDTLS_RSA_PKCS_V15 for 1.5 padding and | |
| #MBEDTLS_RSA_PKCS_V21 for OAEP or PSS. */ | |
| int 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) | |
| mbedtls_threading_mutex_t 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 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 rsa_rsaes_xxx or \c 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 RSA context to initialize. This must not be \c NULL. | |
| * \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 of ::mbedtls_md_type_t type, if | |
| * \p padding is #MBEDTLS_RSA_PKCS_V21. It is unused | |
| * otherwise. | |
| */ | |
| void mbedtls_rsa_init( mbedtls_rsa_context *ctx, | |
| int padding, | |
| int hash_id ); | |
| /** | |
| * \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 ns 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 \p N and \p 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 \p P, \p Q from \p N, \p D, \p E.</li> | |
| * <li>Derive \p N, \p D from \p P, \p Q, \p 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 sets padding for an already initialized RSA | |
| * context. See mbedtls_rsa_init() for details. | |
| * | |
| * \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 #MBEDTLS_RSA_PKCS_V21 hash identifier. | |
| */ | |
| void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding, | |
| int hash_id ); | |
| /** | |
| * \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 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 an 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 \p 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 exponentation | |
| * 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 discouraged | |
| * and deprecated to pass \c NULL here, in which case | |
| * blinding will be omitted. | |
| * \param p_rng The RNG context to pass to \p f_rng. This may be \c NULL | |
| * if \p f_rng is \c NULL or 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 using the \p mode from the context. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PUBLIC. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PRIVATE and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG to use. It is mandatory for PKCS#1 v2.1 padding | |
| * encoding, and for PKCS#1 v1.5 padding encoding when used | |
| * with \p mode set to #MBEDTLS_RSA_PUBLIC. For PKCS#1 v1.5 | |
| * padding encoding and \p mode set to #MBEDTLS_RSA_PRIVATE, | |
| * it is used for blinding and should be provided in this | |
| * case; see mbedtls_rsa_private() for more. | |
| * \param p_rng The RNG context to be passed to \p f_rng. May be | |
| * \c NULL if \p f_rng is \c NULL or if \p f_rng doesn't | |
| * need a context argument. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated). | |
| * \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, | |
| int mode, 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). | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PUBLIC. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PRIVATE and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG function to use. It is needed for padding generation | |
| * if \p mode is #MBEDTLS_RSA_PUBLIC. If \p mode is | |
| * #MBEDTLS_RSA_PRIVATE (discouraged), it is used for | |
| * blinding and should be provided; see mbedtls_rsa_private(). | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may | |
| * be \c NULL if \p f_rng is \c NULL or if \p f_rng | |
| * doesn't need a context argument. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated). | |
| * \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, | |
| int mode, 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. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PUBLIC. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PRIVATE and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initnialized RSA context to use. | |
| * \param f_rng The RNG function to use. This is needed for padding | |
| * generation and must be provided. | |
| * \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 mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated). | |
| * \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, | |
| int mode, | |
| 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 using the \p mode from the context. | |
| * | |
| * \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. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PRIVATE. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PUBLIC and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. If \p mode is | |
| * #MBEDTLS_RSA_PUBLIC, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be | |
| * \c NULL if \p f_rng is \c NULL or doesn't need a context. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated). | |
| * \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, | |
| int mode, 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). | |
| * | |
| * \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. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PRIVATE. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PUBLIC and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. If \p mode is | |
| * #MBEDTLS_RSA_PUBLIC, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be | |
| * \c NULL if \p f_rng is \c NULL or doesn't need a context. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated). | |
| * \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, | |
| int mode, 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. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PRIVATE. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PUBLIC and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. If \p mode is | |
| * #MBEDTLS_RSA_PUBLIC, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be | |
| * \c NULL if \p f_rng is \c NULL or doesn't need a context. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated). | |
| * \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, | |
| int mode, | |
| 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 using the \p mode from the context. | |
| * | |
| * \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. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PRIVATE. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PUBLIC and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG function to use. If the padding mode is PKCS#1 v2.1, | |
| * this must be provided. If the padding mode is PKCS#1 v1.5 and | |
| * \p mode is #MBEDTLS_RSA_PRIVATE, it is used for blinding | |
| * and should be provided; see mbedtls_rsa_private() for more | |
| * more. It is ignored otherwise. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be \c NULL | |
| * if \p f_rng is \c NULL or doesn't need a context argument. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated). | |
| * \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. | |
| * Ths is only used if \p md_alg is #MBEDTLS_MD_NONE. | |
| * \param hash The buffer holding the message digest or raw data. | |
| * If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable | |
| * buffer of length \p hashlen Bytes. If \p md_alg is not | |
| * #MBEDTLS_MD_NONE, it must be a readable buffer of length | |
| * the size of the hash corresponding to \p md_alg. | |
| * \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. | |
| * | |
| * \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, | |
| int mode, | |
| 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). | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PRIVATE. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PUBLIC and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. If \p mode is | |
| * #MBEDTLS_RSA_PUBLIC, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be \c NULL | |
| * if \p f_rng is \c NULL or doesn't need a context argument. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated). | |
| * \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. | |
| * Ths is only used if \p md_alg is #MBEDTLS_MD_NONE. | |
| * \param hash The buffer holding the message digest or raw data. | |
| * If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable | |
| * buffer of length \p hashlen Bytes. If \p md_alg is not | |
| * #MBEDTLS_MD_NONE, it must be a readable buffer of length | |
| * the size of the hash corresponding to \p md_alg. | |
| * \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. | |
| * | |
| * \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, | |
| int mode, | |
| 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 \p hash_id in the RSA context is the one used for the | |
| * encoding. \p md_alg in the function call is the type of hash | |
| * that is encoded. According to <em>RFC-3447: Public-Key | |
| * Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography | |
| * Specifications</em> it is advised to keep both hashes the | |
| * same. | |
| * | |
| * \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. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PRIVATE. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PUBLIC and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA context to use. | |
| * \param f_rng The RNG function. It 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 mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated). | |
| * \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. | |
| * Ths is only used if \p md_alg is #MBEDTLS_MD_NONE. | |
| * \param hash The buffer holding the message digest or raw data. | |
| * If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable | |
| * buffer of length \p hashlen Bytes. If \p md_alg is not | |
| * #MBEDTLS_MD_NONE, it must be a readable buffer of length | |
| * the size of the hash corresponding to \p md_alg. | |
| * \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. | |
| * | |
| * \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, | |
| int mode, | |
| 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 using the mode from the context. | |
| * | |
| * \note For PKCS#1 v2.1 encoding, see comments on | |
| * mbedtls_rsa_rsassa_pss_verify() about \p md_alg and | |
| * \p hash_id. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * set to #MBEDTLS_RSA_PUBLIC. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PRIVATE and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA public key context to use. | |
| * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. Otherwise, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be | |
| * \c NULL if \p f_rng is \c NULL or doesn't need a context. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated). | |
| * \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. | |
| * This is only used if \p md_alg is #MBEDTLS_MD_NONE. | |
| * \param hash The buffer holding the message digest or raw data. | |
| * If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable | |
| * buffer of length \p hashlen Bytes. If \p md_alg is not | |
| * #MBEDTLS_MD_NONE, it must be a readable buffer of length | |
| * the size of the hash corresponding to \p md_alg. | |
| * \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, | |
| int (*f_rng)(void *, unsigned char *, size_t), | |
| void *p_rng, | |
| int mode, | |
| 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). | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * set to #MBEDTLS_RSA_PUBLIC. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PRIVATE and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA public key context to use. | |
| * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. Otherwise, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be | |
| * \c NULL if \p f_rng is \c NULL or doesn't need a context. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated). | |
| * \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. | |
| * This is only used if \p md_alg is #MBEDTLS_MD_NONE. | |
| * \param hash The buffer holding the message digest or raw data. | |
| * If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable | |
| * buffer of length \p hashlen Bytes. If \p md_alg is not | |
| * #MBEDTLS_MD_NONE, it must be a readable buffer of length | |
| * the size of the hash corresponding to \p md_alg. | |
| * \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, | |
| int (*f_rng)(void *, unsigned char *, size_t), | |
| void *p_rng, | |
| int mode, | |
| 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). | |
| * | |
| * The hash function for the MGF mask generating function | |
| * is that specified in the RSA context. | |
| * | |
| * \note The \p hash_id in the RSA context is the one used for the | |
| * verification. \p md_alg in the function call is the type of | |
| * hash that is verified. According to <em>RFC-3447: Public-Key | |
| * Cryptography Standards (PKCS) #1 v2.1: RSA Cryptography | |
| * Specifications</em> it is advised to keep both hashes the | |
| * same. If \p hash_id in the RSA context is unset, | |
| * the \p md_alg from the function call is used. | |
| * | |
| * \deprecated It is deprecated and discouraged to call this function | |
| * in #MBEDTLS_RSA_PRIVATE mode. Future versions of the library | |
| * are likely to remove the \p mode argument and have it | |
| * implicitly set to #MBEDTLS_RSA_PUBLIC. | |
| * | |
| * \note Alternative implementations of RSA need not support | |
| * mode being set to #MBEDTLS_RSA_PRIVATE and might instead | |
| * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. | |
| * | |
| * \param ctx The initialized RSA public key context to use. | |
| * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. Otherwise, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be | |
| * \c NULL if \p f_rng is \c NULL or doesn't need a context. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated). | |
| * \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. | |
| * This is only used if \p md_alg is #MBEDTLS_MD_NONE. | |
| * \param hash The buffer holding the message digest or raw data. | |
| * If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable | |
| * buffer of length \p hashlen Bytes. If \p md_alg is not | |
| * #MBEDTLS_MD_NONE, it must be a readable buffer of length | |
| * the size of the hash corresponding to \p md_alg. | |
| * \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, | |
| int (*f_rng)(void *, unsigned char *, size_t), | |
| void *p_rng, | |
| int mode, | |
| 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). | |
| * | |
| * The hash function for the MGF mask generating function | |
| * is that specified in \p mgf1_hash_id. | |
| * | |
| * \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 \p hash_id in the RSA context is ignored. | |
| * | |
| * \param ctx The initialized RSA public key context to use. | |
| * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE, | |
| * this is used for blinding and should be provided; see | |
| * mbedtls_rsa_private() for more. Otherwise, it is ignored. | |
| * \param p_rng The RNG context to be passed to \p f_rng. This may be | |
| * \c NULL if \p f_rng is \c NULL or doesn't need a context. | |
| * \param mode The mode of operation. This must be either | |
| * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE. | |
| * \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. | |
| * This is only used if \p md_alg is #MBEDTLS_MD_NONE. | |
| * \param hash The buffer holding the message digest or raw data. | |
| * If \p md_alg is #MBEDTLS_MD_NONE, this must be a readable | |
| * buffer of length \p hashlen Bytes. If \p md_alg is not | |
| * #MBEDTLS_MD_NONE, it must be a readable buffer of length | |
| * the size of the hash corresponding to \p md_alg. | |
| * \param mgf1_hash_id The message digest used for mask generation. | |
| * \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, | |
| int (*f_rng)(void *, unsigned char *, size_t), | |
| void *p_rng, | |
| int mode, | |
| 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 */ |