1 /* crypto/ecdsa/ecdsa.h */
3 * \file crypto/ecdsa/ecdsa.h Include file for the OpenSSL ECDSA functions
4 * \author Written by Nils Larsch for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
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54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
59 #ifndef HEADER_ECDSA_H
60 # define HEADER_ECDSA_H
62 # include <openssl/opensslconf.h>
65 # error EC is disabled.
68 # include <openssl/ec.h>
69 # include <openssl/ossl_typ.h>
70 # ifdef OPENSSL_USE_DEPRECATED
71 # include <openssl/bn.h>
78 /** Computes the ECDSA signature of the given hash value using
79 * the supplied private key and returns the created signature.
80 * \param dgst pointer to the hash value
81 * \param dgst_len length of the hash value
82 * \param eckey EC_KEY object containing a private EC key
83 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
85 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dgst_len,
88 /** Computes ECDSA signature of a given hash value using the supplied
89 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
90 * \param dgst pointer to the hash value to sign
91 * \param dgstlen length of the hash value
92 * \param kinv BIGNUM with a pre-computed inverse k (optional)
93 * \param rp BIGNUM with a pre-computed rp value (optioanl),
94 * see ECDSA_sign_setup
95 * \param eckey EC_KEY object containing a private EC key
96 * \return pointer to a ECDSA_SIG structure or NULL if an error occurred
98 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dgstlen,
99 const BIGNUM *kinv, const BIGNUM *rp,
102 /** Verifies that the supplied signature is a valid ECDSA
103 * signature of the supplied hash value using the supplied public key.
104 * \param dgst pointer to the hash value
105 * \param dgst_len length of the hash value
106 * \param sig ECDSA_SIG structure
107 * \param eckey EC_KEY object containing a public EC key
108 * \return 1 if the signature is valid, 0 if the signature is invalid
111 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
112 const ECDSA_SIG *sig, EC_KEY *eckey);
114 const ECDSA_METHOD *ECDSA_OpenSSL(void);
116 /** Sets the default ECDSA method
117 * \param meth new default ECDSA_METHOD
119 void ECDSA_set_default_method(const ECDSA_METHOD *meth);
121 /** Returns the default ECDSA method
122 * \return pointer to ECDSA_METHOD structure containing the default method
124 const ECDSA_METHOD *ECDSA_get_default_method(void);
126 /** Sets method to be used for the ECDSA operations
127 * \param eckey EC_KEY object
128 * \param meth new method
129 * \return 1 on success and 0 otherwise
131 int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth);
133 /** Returns the maximum length of the DER encoded signature
134 * \param eckey EC_KEY object
135 * \return numbers of bytes required for the DER encoded signature
137 int ECDSA_size(const EC_KEY *eckey);
139 /* the standard ex_data functions */
140 #define ECDSA_get_ex_new_index(l, p, newf, dupf, freef) \
141 CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, l, p, newf, dupf, freef)
142 int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg);
143 void *ECDSA_get_ex_data(EC_KEY *d, int idx);
145 /** Allocates and initialize a ECDSA_METHOD structure
146 * \param ecdsa_method pointer to ECDSA_METHOD to copy. (May be NULL)
147 * \return pointer to a ECDSA_METHOD structure or NULL if an error occurred
150 ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_method);
152 /** frees a ECDSA_METHOD structure
153 * \param ecdsa_method pointer to the ECDSA_METHOD structure
155 void ECDSA_METHOD_free(ECDSA_METHOD *ecdsa_method);
157 /** Sets application specific data in the ECDSA_METHOD
158 * \param ecdsa_method pointer to existing ECDSA_METHOD
159 * \param app application specific data to set
162 void ECDSA_METHOD_set_app_data(ECDSA_METHOD *ecdsa_method, void *app);
164 /** Returns application specific data from a ECDSA_METHOD structure
165 * \param ecdsa_method pointer to ECDSA_METHOD structure
166 * \return pointer to application specific data.
169 void *ECDSA_METHOD_get_app_data(ECDSA_METHOD *ecdsa_method);
171 /** Set the ECDSA_do_sign function in the ECDSA_METHOD
172 * \param ecdsa_method pointer to existing ECDSA_METHOD
173 * \param ecdsa_do_sign a funtion of type ECDSA_do_sign
176 void ECDSA_METHOD_set_sign(ECDSA_METHOD *ecdsa_method,
177 ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char
183 /** Set the ECDSA_sign_setup function in the ECDSA_METHOD
184 * \param ecdsa_method pointer to existing ECDSA_METHOD
185 * \param ecdsa_sign_setup a funtion of type ECDSA_sign_setup
188 void ECDSA_METHOD_set_sign_setup(ECDSA_METHOD *ecdsa_method,
189 int (*ecdsa_sign_setup) (EC_KEY *eckey,
194 /** Set the ECDSA_do_verify function in the ECDSA_METHOD
195 * \param ecdsa_method pointer to existing ECDSA_METHOD
196 * \param ecdsa_do_verify a funtion of type ECDSA_do_verify
199 void ECDSA_METHOD_set_verify(ECDSA_METHOD *ecdsa_method,
200 int (*ecdsa_do_verify) (const unsigned char
202 const ECDSA_SIG *sig,
205 void ECDSA_METHOD_set_flags(ECDSA_METHOD *ecdsa_method, int flags);
207 /** Set the flags field in the ECDSA_METHOD
208 * \param ecdsa_method pointer to existing ECDSA_METHOD
209 * \param flags flags value to set
212 void ECDSA_METHOD_set_name(ECDSA_METHOD *ecdsa_method, char *name);
214 /** Set the name field in the ECDSA_METHOD
215 * \param ecdsa_method pointer to existing ECDSA_METHOD
216 * \param name name to set
219 /* BEGIN ERROR CODES */
221 * The following lines are auto generated by the script mkerr.pl. Any changes
222 * made after this point may be overwritten when the script is next run.
224 void ERR_load_ECDSA_strings(void);
226 /* Error codes for the ECDSA functions. */
228 /* Function codes. */
229 # define ECDSA_F_ECDSA_DATA_NEW_METHOD 100
230 # define ECDSA_F_ECDSA_DO_SIGN 101
231 # define ECDSA_F_ECDSA_DO_VERIFY 102
232 # define ECDSA_F_ECDSA_METHOD_NEW 105
233 # define ECDSA_F_ECDSA_SIGN_SETUP 103
236 # define ECDSA_R_BAD_SIGNATURE 100
237 # define ECDSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 101
238 # define ECDSA_R_ERR_EC_LIB 102
239 # define ECDSA_R_MISSING_PARAMETERS 103
240 # define ECDSA_R_NEED_NEW_SETUP_VALUES 106
241 # define ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED 104
242 # define ECDSA_R_SIGNATURE_MALLOC_FAILED 105