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dsa.h
/* crypto/dsa/dsa.h */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* * The DSS routines are based on patches supplied by * Steven Schoch <schoch@sheba.arc.nasa.gov>. He basically did the * work and I have just tweaked them a little to fit into my * stylistic vision for SSLeay :-) */ #ifndef HEADER_DSA_H # define HEADER_DSA_H # include <openssl/e_os2.h> # ifdef OPENSSL_NO_DSA # error DSA is disabled. # endif # ifndef OPENSSL_NO_BIO # include <openssl/bio.h> # endif # include <openssl/crypto.h> # include <openssl/ossl_typ.h> # ifndef OPENSSL_NO_DEPRECATED # include <openssl/bn.h> # ifndef OPENSSL_NO_DH # include <openssl/dh.h> # endif # endif # ifndef OPENSSL_DSA_MAX_MODULUS_BITS # define OPENSSL_DSA_MAX_MODULUS_BITS 10000 # endif # define DSA_FLAG_CACHE_MONT_P 0x01 /* * new with 0.9.7h; the built-in DSA implementation now uses constant time * modular exponentiation for secret exponents by default. This flag causes * the faster variable sliding window method to be used for all exponents. */ # define DSA_FLAG_NO_EXP_CONSTTIME 0x02 /* * If this flag is set the DSA method is FIPS compliant and can be used in * FIPS mode. This is set in the validated module method. If an application * sets this flag in its own methods it is its reposibility to ensure the * result is compliant. */ # define DSA_FLAG_FIPS_METHOD 0x0400 /* * If this flag is set the operations normally disabled in FIPS mode are * permitted it is then the applications responsibility to ensure that the * usage is compliant. */ # define DSA_FLAG_NON_FIPS_ALLOW 0x0400 #ifdef __cplusplus extern "C" { #endif /* Already defined in ossl_typ.h */ /* typedef struct dsa_st DSA; */ /* typedef struct dsa_method DSA_METHOD; */ typedef struct DSA_SIG_st { BIGNUM *r; BIGNUM *s; } DSA_SIG; struct dsa_method { const char *name; DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa); int (*dsa_sign_setup) (DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp); int (*dsa_do_verify) (const unsigned char *dgst, int dgst_len, DSA_SIG *sig, DSA *dsa); int (*dsa_mod_exp) (DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont); /* Can be null */ int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); int (*init) (DSA *dsa); int (*finish) (DSA *dsa); int flags; char *app_data; /* If this is non-NULL, it is used to generate DSA parameters */ int (*dsa_paramgen) (DSA *dsa, int bits, const unsigned char *seed, int seed_len, int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); /* If this is non-NULL, it is used to generate DSA keys */ int (*dsa_keygen) (DSA *dsa); }; struct dsa_st { /* * This first variable is used to pick up errors where a DSA is passed * instead of of a EVP_PKEY */ int pad; long version; int write_params; BIGNUM *p; BIGNUM *q; /* == 20 */ BIGNUM *g; BIGNUM *pub_key; /* y public key */ BIGNUM *priv_key; /* x private key */ BIGNUM *kinv; /* Signing pre-calc */ BIGNUM *r; /* Signing pre-calc */ int flags; /* Normally used to cache montgomery values */ BN_MONT_CTX *method_mont_p; int references; CRYPTO_EX_DATA ex_data; const DSA_METHOD *meth; /* functional reference if 'meth' is ENGINE-provided */ ENGINE *engine; }; # define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \ (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x)) # define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \ (unsigned char *)(x)) # define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x) # define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x) DSA *DSAparams_dup(DSA *x); DSA_SIG *DSA_SIG_new(void); void DSA_SIG_free(DSA_SIG *a); int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp); DSA_SIG *d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length); DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa); int DSA_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig, DSA *dsa); const DSA_METHOD *DSA_OpenSSL(void); void DSA_set_default_method(const DSA_METHOD *); const DSA_METHOD *DSA_get_default_method(void); int DSA_set_method(DSA *dsa, const DSA_METHOD *); DSA *DSA_new(void); DSA *DSA_new_method(ENGINE *engine); void DSA_free(DSA *r); /* "up" the DSA object's reference count */ int DSA_up_ref(DSA *r); int DSA_size(const DSA *); /* next 4 return -1 on error */ int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp); int DSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig, unsigned int *siglen, DSA *dsa); int DSA_verify(int type, const unsigned char *dgst, int dgst_len, const unsigned char *sigbuf, int siglen, DSA *dsa); int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); int DSA_set_ex_data(DSA *d, int idx, void *arg); void *DSA_get_ex_data(DSA *d, int idx); DSA *d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length); DSA *d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length); DSA *d2i_DSAparams(DSA **a, const unsigned char **pp, long length); /* Deprecated version */ # ifndef OPENSSL_NO_DEPRECATED DSA *DSA_generate_parameters(int bits, unsigned char *seed, int seed_len, int *counter_ret, unsigned long *h_ret, void (*callback) (int, int, void *), void *cb_arg); # endif /* !defined(OPENSSL_NO_DEPRECATED) */ /* New version */ int DSA_generate_parameters_ex(DSA *dsa, int bits, const unsigned char *seed, int seed_len, int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); int DSA_generate_key(DSA *a); int i2d_DSAPublicKey(const DSA *a, unsigned char **pp); int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp); int i2d_DSAparams(const DSA *a, unsigned char **pp); # ifndef OPENSSL_NO_BIO int DSAparams_print(BIO *bp, const DSA *x); int DSA_print(BIO *bp, const DSA *x, int off); # endif # ifndef OPENSSL_NO_FP_API int DSAparams_print_fp(FILE *fp, const DSA *x); int DSA_print_fp(FILE *bp, const DSA *x, int off); # endif # define DSS_prime_checks 64 /* * Primality test according to FIPS PUB 186-4, Appendix C.3. Since we only * have one value here we set the number of checks to 64 which is the 128 bit * security level that is the highest level and valid for creating a 3072 bit * DSA key. */ # define DSA_is_prime(n, callback, cb_arg) \ BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg) # ifndef OPENSSL_NO_DH /* * Convert DSA structure (key or just parameters) into DH structure (be * careful to avoid small subgroup attacks when using this!) */ DH *DSA_dup_DH(const DSA *r); # endif # define EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits) \ EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, \ EVP_PKEY_CTRL_DSA_PARAMGEN_BITS, nbits, NULL) # define EVP_PKEY_CTRL_DSA_PARAMGEN_BITS (EVP_PKEY_ALG_CTRL + 1) # define EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS (EVP_PKEY_ALG_CTRL + 2) # define EVP_PKEY_CTRL_DSA_PARAMGEN_MD (EVP_PKEY_ALG_CTRL + 3) /* BEGIN ERROR CODES */ /* * The following lines are auto generated by the script mkerr.pl. Any changes * made after this point may be overwritten when the script is next run. */ void ERR_load_DSA_strings(void); /* Error codes for the DSA functions. */ /* Function codes. */ # define DSA_F_D2I_DSA_SIG 110 # define DSA_F_DO_DSA_PRINT 104 # define DSA_F_DSAPARAMS_PRINT 100 # define DSA_F_DSAPARAMS_PRINT_FP 101 # define DSA_F_DSA_BUILTIN_PARAMGEN2 126 # define DSA_F_DSA_DO_SIGN 112 # define DSA_F_DSA_DO_VERIFY 113 # define DSA_F_DSA_GENERATE_KEY 124 # define DSA_F_DSA_GENERATE_PARAMETERS_EX 123 # define DSA_F_DSA_NEW_METHOD 103 # define DSA_F_DSA_PARAM_DECODE 119 # define DSA_F_DSA_PRINT_FP 105 # define DSA_F_DSA_PRIV_DECODE 115 # define DSA_F_DSA_PRIV_ENCODE 116 # define DSA_F_DSA_PUB_DECODE 117 # define DSA_F_DSA_PUB_ENCODE 118 # define DSA_F_DSA_SIGN 106 # define DSA_F_DSA_SIGN_SETUP 107 # define DSA_F_DSA_SIG_NEW 109 # define DSA_F_DSA_SIG_PRINT 125 # define DSA_F_DSA_VERIFY 108 # define DSA_F_I2D_DSA_SIG 111 # define DSA_F_OLD_DSA_PRIV_DECODE 122 # define DSA_F_PKEY_DSA_CTRL 120 # define DSA_F_PKEY_DSA_CTRL_STR 127 # define DSA_F_PKEY_DSA_KEYGEN 121 # define DSA_F_SIG_CB 114 /* Reason codes. */ # define DSA_R_BAD_Q_VALUE 102 # define DSA_R_BN_DECODE_ERROR 108 # define DSA_R_BN_ERROR 109 # define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100 # define DSA_R_DECODE_ERROR 104 # define DSA_R_INVALID_DIGEST_TYPE 106 # define DSA_R_INVALID_PARAMETERS 112 # define DSA_R_MISSING_PARAMETERS 101 # define DSA_R_MODULUS_TOO_LARGE 103 # define DSA_R_NEED_NEW_SETUP_VALUES 110 # define DSA_R_NON_FIPS_DSA_METHOD 111 # define DSA_R_NO_PARAMETERS_SET 107 # define DSA_R_PARAMETER_ENCODING_ERROR 105 # define DSA_R_Q_NOT_PRIME 113 #ifdef __cplusplus } #endif #endif
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