[a1bae3e] | 1 | /* crypto/dsa/dsa.h */ |
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| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * This package is an SSL implementation written |
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| 6 | * by Eric Young (eay@cryptsoft.com). |
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| 7 | * The implementation was written so as to conform with Netscapes SSL. |
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| 8 | * |
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| 9 | * This library is free for commercial and non-commercial use as long as |
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| 10 | * the following conditions are aheared to. The following conditions |
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| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
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| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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| 13 | * included with this distribution is covered by the same copyright terms |
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| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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| 15 | * |
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| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
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| 17 | * the code are not to be removed. |
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| 18 | * If this package is used in a product, Eric Young should be given attribution |
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| 19 | * as the author of the parts of the library used. |
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| 20 | * This can be in the form of a textual message at program startup or |
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| 21 | * in documentation (online or textual) provided with the package. |
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| 22 | * |
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| 23 | * Redistribution and use in source and binary forms, with or without |
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| 24 | * modification, are permitted provided that the following conditions |
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| 25 | * are met: |
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| 26 | * 1. Redistributions of source code must retain the copyright |
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| 27 | * notice, this list of conditions and the following disclaimer. |
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| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 29 | * notice, this list of conditions and the following disclaimer in the |
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| 30 | * documentation and/or other materials provided with the distribution. |
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| 31 | * 3. All advertising materials mentioning features or use of this software |
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| 32 | * must display the following acknowledgement: |
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| 33 | * "This product includes cryptographic software written by |
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| 34 | * Eric Young (eay@cryptsoft.com)" |
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| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
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| 36 | * being used are not cryptographic related :-). |
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| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
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| 38 | * the apps directory (application code) you must include an acknowledgement: |
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| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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| 40 | * |
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| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 51 | * SUCH DAMAGE. |
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| 52 | * |
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| 53 | * The licence and distribution terms for any publically available version or |
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| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
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| 55 | * copied and put under another distribution licence |
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| 56 | * [including the GNU Public Licence.] |
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| 57 | */ |
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| 58 | |
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| 59 | /* |
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| 60 | * The DSS routines are based on patches supplied by |
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| 61 | * Steven Schoch <schoch@sheba.arc.nasa.gov>. He basically did the |
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| 62 | * work and I have just tweaked them a little to fit into my |
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| 63 | * stylistic vision for SSLeay :-) */ |
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| 64 | |
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| 65 | #ifndef HEADER_DSA_H |
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| 66 | #define HEADER_DSA_H |
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| 67 | |
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| 68 | #include <openssl/e_os2.h> |
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| 69 | |
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| 70 | #ifdef OPENSSL_NO_DSA |
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| 71 | #error DSA is disabled. |
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| 72 | #endif |
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| 73 | |
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| 74 | #ifndef OPENSSL_NO_BIO |
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| 75 | #include <openssl/bio.h> |
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| 76 | #endif |
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| 77 | #include <openssl/crypto.h> |
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| 78 | #include <openssl/ossl_typ.h> |
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| 79 | |
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| 80 | #ifndef OPENSSL_NO_DEPRECATED |
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| 81 | #include <openssl/bn.h> |
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| 82 | #ifndef OPENSSL_NO_DH |
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| 83 | # include <openssl/dh.h> |
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| 84 | #endif |
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| 85 | #endif |
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| 86 | |
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| 87 | #define DSA_FLAG_CACHE_MONT_P 0x01 |
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| 88 | #define DSA_FLAG_NO_EXP_CONSTTIME 0x02 /* new with 0.9.7h; the built-in DSA |
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| 89 | * implementation now uses constant time |
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| 90 | * modular exponentiation for secret exponents |
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| 91 | * by default. This flag causes the |
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| 92 | * faster variable sliding window method to |
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| 93 | * be used for all exponents. |
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| 94 | */ |
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| 95 | |
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| 96 | #ifdef __cplusplus |
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| 97 | extern "C" { |
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| 98 | #endif |
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| 99 | |
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| 100 | /* Already defined in ossl_typ.h */ |
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| 101 | /* typedef struct dsa_st DSA; */ |
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| 102 | /* typedef struct dsa_method DSA_METHOD; */ |
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| 103 | |
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| 104 | typedef struct DSA_SIG_st |
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| 105 | { |
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| 106 | BIGNUM *r; |
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| 107 | BIGNUM *s; |
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| 108 | } DSA_SIG; |
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| 109 | |
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| 110 | struct dsa_method |
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| 111 | { |
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| 112 | const char *name; |
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| 113 | DSA_SIG * (*dsa_do_sign)(const unsigned char *dgst, int dlen, DSA *dsa); |
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| 114 | int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, |
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| 115 | BIGNUM **rp); |
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| 116 | int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len, |
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| 117 | DSA_SIG *sig, DSA *dsa); |
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| 118 | int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, |
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| 119 | BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, |
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| 120 | BN_MONT_CTX *in_mont); |
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| 121 | int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, |
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| 122 | const BIGNUM *m, BN_CTX *ctx, |
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| 123 | BN_MONT_CTX *m_ctx); /* Can be null */ |
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| 124 | int (*init)(DSA *dsa); |
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| 125 | int (*finish)(DSA *dsa); |
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| 126 | int flags; |
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| 127 | char *app_data; |
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| 128 | /* If this is non-NULL, it is used to generate DSA parameters */ |
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| 129 | int (*dsa_paramgen)(DSA *dsa, int bits, |
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| 130 | unsigned char *seed, int seed_len, |
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| 131 | int *counter_ret, unsigned long *h_ret, |
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| 132 | BN_GENCB *cb); |
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| 133 | /* If this is non-NULL, it is used to generate DSA keys */ |
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| 134 | int (*dsa_keygen)(DSA *dsa); |
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| 135 | }; |
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| 136 | |
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| 137 | struct dsa_st |
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| 138 | { |
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| 139 | /* This first variable is used to pick up errors where |
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| 140 | * a DSA is passed instead of of a EVP_PKEY */ |
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| 141 | int pad; |
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| 142 | long version; |
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| 143 | int write_params; |
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| 144 | BIGNUM *p; |
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| 145 | BIGNUM *q; /* == 20 */ |
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| 146 | BIGNUM *g; |
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| 147 | |
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| 148 | BIGNUM *pub_key; /* y public key */ |
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| 149 | BIGNUM *priv_key; /* x private key */ |
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| 150 | |
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| 151 | BIGNUM *kinv; /* Signing pre-calc */ |
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| 152 | BIGNUM *r; /* Signing pre-calc */ |
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| 153 | |
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| 154 | int flags; |
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| 155 | /* Normally used to cache montgomery values */ |
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| 156 | BN_MONT_CTX *method_mont_p; |
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| 157 | int references; |
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| 158 | CRYPTO_EX_DATA ex_data; |
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| 159 | const DSA_METHOD *meth; |
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| 160 | /* functional reference if 'meth' is ENGINE-provided */ |
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| 161 | ENGINE *engine; |
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| 162 | }; |
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| 163 | |
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| 164 | #define DSAparams_dup(x) ASN1_dup_of_const(DSA,i2d_DSAparams,d2i_DSAparams,x) |
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| 165 | #define d2i_DSAparams_fp(fp,x) (DSA *)ASN1_d2i_fp((char *(*)())DSA_new, \ |
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| 166 | (char *(*)())d2i_DSAparams,(fp),(unsigned char **)(x)) |
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| 167 | #define i2d_DSAparams_fp(fp,x) ASN1_i2d_fp(i2d_DSAparams,(fp), \ |
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| 168 | (unsigned char *)(x)) |
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| 169 | #define d2i_DSAparams_bio(bp,x) ASN1_d2i_bio_of(DSA,DSA_new,d2i_DSAparams,bp,x) |
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| 170 | #define i2d_DSAparams_bio(bp,x) ASN1_i2d_bio_of_const(DSA,i2d_DSAparams,bp,x) |
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| 171 | |
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| 172 | |
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| 173 | DSA_SIG * DSA_SIG_new(void); |
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| 174 | void DSA_SIG_free(DSA_SIG *a); |
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| 175 | int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp); |
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| 176 | DSA_SIG * d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length); |
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| 177 | |
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| 178 | DSA_SIG * DSA_do_sign(const unsigned char *dgst,int dlen,DSA *dsa); |
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| 179 | int DSA_do_verify(const unsigned char *dgst,int dgst_len, |
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| 180 | DSA_SIG *sig,DSA *dsa); |
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| 181 | |
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| 182 | const DSA_METHOD *DSA_OpenSSL(void); |
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| 183 | |
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| 184 | void DSA_set_default_method(const DSA_METHOD *); |
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| 185 | const DSA_METHOD *DSA_get_default_method(void); |
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| 186 | int DSA_set_method(DSA *dsa, const DSA_METHOD *); |
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| 187 | |
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| 188 | DSA * DSA_new(void); |
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| 189 | DSA * DSA_new_method(ENGINE *engine); |
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| 190 | void DSA_free (DSA *r); |
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| 191 | /* "up" the DSA object's reference count */ |
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| 192 | int DSA_up_ref(DSA *r); |
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| 193 | int DSA_size(const DSA *); |
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| 194 | /* next 4 return -1 on error */ |
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| 195 | int DSA_sign_setup( DSA *dsa,BN_CTX *ctx_in,BIGNUM **kinvp,BIGNUM **rp); |
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| 196 | int DSA_sign(int type,const unsigned char *dgst,int dlen, |
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| 197 | unsigned char *sig, unsigned int *siglen, DSA *dsa); |
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| 198 | int DSA_verify(int type,const unsigned char *dgst,int dgst_len, |
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| 199 | const unsigned char *sigbuf, int siglen, DSA *dsa); |
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| 200 | int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
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| 201 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func); |
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| 202 | int DSA_set_ex_data(DSA *d, int idx, void *arg); |
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| 203 | void *DSA_get_ex_data(DSA *d, int idx); |
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| 204 | |
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| 205 | DSA * d2i_DSAPublicKey(DSA **a, const unsigned char **pp, long length); |
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| 206 | DSA * d2i_DSAPrivateKey(DSA **a, const unsigned char **pp, long length); |
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| 207 | DSA * d2i_DSAparams(DSA **a, const unsigned char **pp, long length); |
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| 208 | |
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| 209 | /* Deprecated version */ |
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| 210 | #ifndef OPENSSL_NO_DEPRECATED |
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| 211 | DSA * DSA_generate_parameters(int bits, |
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| 212 | unsigned char *seed,int seed_len, |
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| 213 | int *counter_ret, unsigned long *h_ret,void |
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| 214 | (*callback)(int, int, void *),void *cb_arg); |
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| 215 | #endif /* !defined(OPENSSL_NO_DEPRECATED) */ |
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| 216 | |
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| 217 | /* New version */ |
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| 218 | int DSA_generate_parameters_ex(DSA *dsa, int bits, |
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| 219 | unsigned char *seed,int seed_len, |
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| 220 | int *counter_ret, unsigned long *h_ret, BN_GENCB *cb); |
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| 221 | |
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| 222 | int DSA_generate_key(DSA *a); |
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| 223 | int i2d_DSAPublicKey(const DSA *a, unsigned char **pp); |
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| 224 | int i2d_DSAPrivateKey(const DSA *a, unsigned char **pp); |
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| 225 | int i2d_DSAparams(const DSA *a,unsigned char **pp); |
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| 226 | |
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| 227 | #ifndef OPENSSL_NO_BIO |
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| 228 | int DSAparams_print(BIO *bp, const DSA *x); |
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| 229 | int DSA_print(BIO *bp, const DSA *x, int off); |
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| 230 | #endif |
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| 231 | #ifndef OPENSSL_NO_FP_API |
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| 232 | int DSAparams_print_fp(FILE *fp, const DSA *x); |
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| 233 | int DSA_print_fp(FILE *bp, const DSA *x, int off); |
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| 234 | #endif |
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| 235 | |
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| 236 | #define DSS_prime_checks 50 |
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| 237 | /* Primality test according to FIPS PUB 186[-1], Appendix 2.1: |
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| 238 | * 50 rounds of Rabin-Miller */ |
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| 239 | #define DSA_is_prime(n, callback, cb_arg) \ |
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| 240 | BN_is_prime(n, DSS_prime_checks, callback, NULL, cb_arg) |
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| 241 | |
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| 242 | #ifndef OPENSSL_NO_DH |
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| 243 | /* Convert DSA structure (key or just parameters) into DH structure |
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| 244 | * (be careful to avoid small subgroup attacks when using this!) */ |
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| 245 | DH *DSA_dup_DH(const DSA *r); |
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| 246 | #endif |
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| 247 | |
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| 248 | /* BEGIN ERROR CODES */ |
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| 249 | /* The following lines are auto generated by the script mkerr.pl. Any changes |
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| 250 | * made after this point may be overwritten when the script is next run. |
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| 251 | */ |
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| 252 | void ERR_load_DSA_strings(void); |
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| 253 | |
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| 254 | /* Error codes for the DSA functions. */ |
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| 255 | |
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| 256 | /* Function codes. */ |
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| 257 | #define DSA_F_D2I_DSA_SIG 110 |
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| 258 | #define DSA_F_DSAPARAMS_PRINT 100 |
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| 259 | #define DSA_F_DSAPARAMS_PRINT_FP 101 |
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| 260 | #define DSA_F_DSA_DO_SIGN 112 |
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| 261 | #define DSA_F_DSA_DO_VERIFY 113 |
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| 262 | #define DSA_F_DSA_NEW_METHOD 103 |
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| 263 | #define DSA_F_DSA_PRINT 104 |
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| 264 | #define DSA_F_DSA_PRINT_FP 105 |
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| 265 | #define DSA_F_DSA_SIGN 106 |
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| 266 | #define DSA_F_DSA_SIGN_SETUP 107 |
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| 267 | #define DSA_F_DSA_SIG_NEW 109 |
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| 268 | #define DSA_F_DSA_VERIFY 108 |
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| 269 | #define DSA_F_I2D_DSA_SIG 111 |
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| 270 | #define DSA_F_SIG_CB 114 |
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| 271 | |
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| 272 | /* Reason codes. */ |
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| 273 | #define DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 100 |
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| 274 | #define DSA_R_MISSING_PARAMETERS 101 |
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| 275 | |
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| 276 | #ifdef __cplusplus |
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| 277 | } |
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| 278 | #endif |
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| 279 | #endif |
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