diff options
Diffstat (limited to 'ruby_1_8_5/ext/openssl/ossl_pkey_dsa.c')
| -rw-r--r-- | ruby_1_8_5/ext/openssl/ossl_pkey_dsa.c | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/ruby_1_8_5/ext/openssl/ossl_pkey_dsa.c b/ruby_1_8_5/ext/openssl/ossl_pkey_dsa.c new file mode 100644 index 0000000000..2a6060fe77 --- /dev/null +++ b/ruby_1_8_5/ext/openssl/ossl_pkey_dsa.c @@ -0,0 +1,417 @@ +/* + * $Id: ossl_pkey_dsa.c,v 1.5.2.3 2005/09/18 22:56:11 gotoyuzo Exp $ + * 'OpenSSL for Ruby' project + * Copyright (C) 2001-2002 Michal Rokos <m.rokos@sh.cvut.cz> + * All rights reserved. + */ +/* + * This program is licenced under the same licence as Ruby. + * (See the file 'LICENCE'.) + */ +#if !defined(OPENSSL_NO_DSA) + +#include "ossl.h" + +#define GetPKeyDSA(obj, pkey) do { \ + GetPKey(obj, pkey); \ + if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DSA) { /* PARANOIA? */ \ + ossl_raise(rb_eRuntimeError, "THIS IS NOT A DSA!"); \ + } \ +} while (0) + +#define DSA_HAS_PRIVATE(dsa) ((dsa)->priv_key) +#define DSA_PRIVATE(obj,dsa) (DSA_HAS_PRIVATE(dsa)||OSSL_PKEY_IS_PRIVATE(obj)) + +/* + * Classes + */ +VALUE cDSA; +VALUE eDSAError; + +/* + * Public + */ +static VALUE +dsa_instance(VALUE klass, DSA *dsa) +{ + EVP_PKEY *pkey; + VALUE obj; + + if (!dsa) { + return Qfalse; + } + if (!(pkey = EVP_PKEY_new())) { + return Qfalse; + } + if (!EVP_PKEY_assign_DSA(pkey, dsa)) { + EVP_PKEY_free(pkey); + return Qfalse; + } + WrapPKey(klass, obj, pkey); + + return obj; +} + +VALUE +ossl_dsa_new(EVP_PKEY *pkey) +{ + VALUE obj; + + if (!pkey) { + obj = dsa_instance(cDSA, DSA_new()); + } else { + if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DSA) { + ossl_raise(rb_eTypeError, "Not a DSA key!"); + } + WrapPKey(cDSA, obj, pkey); + } + if (obj == Qfalse) { + ossl_raise(eDSAError, NULL); + } + + return obj; +} + +/* + * Private + */ +static DSA * +dsa_generate(int size) +{ + DSA *dsa; + unsigned char seed[20]; + int seed_len = 20, counter; + unsigned long h; + + if (!RAND_bytes(seed, seed_len)) { + return 0; + } + dsa = DSA_generate_parameters(size, seed, seed_len, &counter, &h, + rb_block_given_p() ? ossl_generate_cb : NULL, + NULL); + if(!dsa) return 0; + + if (!DSA_generate_key(dsa)) { + DSA_free(dsa); + return 0; + } + + return dsa; +} + +static VALUE +ossl_dsa_s_generate(VALUE klass, VALUE size) +{ + DSA *dsa = dsa_generate(FIX2INT(size)); /* err handled by dsa_instance */ + VALUE obj = dsa_instance(klass, dsa); + + if (obj == Qfalse) { + DSA_free(dsa); + ossl_raise(eDSAError, NULL); + } + + return obj; +} + +static VALUE +ossl_dsa_initialize(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + DSA *dsa; + BIO *in; + char *passwd = NULL; + VALUE arg, pass; + + GetPKey(self, pkey); + if(rb_scan_args(argc, argv, "02", &arg, &pass) == 0) { + dsa = DSA_new(); + } + else if (FIXNUM_P(arg)) { + if (!(dsa = dsa_generate(FIX2INT(arg)))) { + ossl_raise(eDSAError, NULL); + } + } + else { + if (!NIL_P(pass)) passwd = StringValuePtr(pass); + arg = ossl_to_der_if_possible(arg); + in = ossl_obj2bio(arg); + dsa = PEM_read_bio_DSAPrivateKey(in, NULL, ossl_pem_passwd_cb, passwd); + if (!dsa) { + BIO_reset(in); + dsa = PEM_read_bio_DSAPublicKey(in, NULL, NULL, NULL); + } + if (!dsa) { + BIO_reset(in); + dsa = PEM_read_bio_DSA_PUBKEY(in, NULL, NULL, NULL); + } + if (!dsa) { + BIO_reset(in); + dsa = d2i_DSAPrivateKey_bio(in, NULL); + } + if (!dsa) { + BIO_reset(in); + dsa = d2i_DSA_PUBKEY_bio(in, NULL); + } + BIO_free(in); + if (!dsa) ossl_raise(eDSAError, "Neither PUB key nor PRIV key:"); + } + if (!EVP_PKEY_assign_DSA(pkey, dsa)) { + DSA_free(dsa); + ossl_raise(eDSAError, NULL); + } + + return self; +} + +static VALUE +ossl_dsa_is_public(VALUE self) +{ + EVP_PKEY *pkey; + + GetPKeyDSA(self, pkey); + + /* + * Do we need to check dsap->dsa->public_pkey? + * return Qtrue; + */ + return (pkey->pkey.dsa->pub_key) ? Qtrue : Qfalse; +} + +static VALUE +ossl_dsa_is_private(VALUE self) +{ + EVP_PKEY *pkey; + + GetPKeyDSA(self, pkey); + + return (DSA_PRIVATE(self, pkey->pkey.dsa)) ? Qtrue : Qfalse; +} + +static VALUE +ossl_dsa_export(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + BIO *out; + const EVP_CIPHER *ciph = NULL; + char *passwd = NULL; + VALUE cipher, pass, str; + + GetPKeyDSA(self, pkey); + rb_scan_args(argc, argv, "02", &cipher, &pass); + if (!NIL_P(cipher)) { + ciph = GetCipherPtr(cipher); + if (!NIL_P(pass)) { + passwd = StringValuePtr(pass); + } + } + if (!(out = BIO_new(BIO_s_mem()))) { + ossl_raise(eDSAError, NULL); + } + if (DSA_HAS_PRIVATE(pkey->pkey.dsa)) { + if (!PEM_write_bio_DSAPrivateKey(out, pkey->pkey.dsa, ciph, + NULL, 0, ossl_pem_passwd_cb, passwd)){ + BIO_free(out); + ossl_raise(eDSAError, NULL); + } + } else { + if (!PEM_write_bio_DSAPublicKey(out, pkey->pkey.dsa)) { + BIO_free(out); + ossl_raise(eDSAError, NULL); + } + } + str = ossl_membio2str(out); + + return str; +} + +static VALUE +ossl_dsa_to_der(VALUE self) +{ + EVP_PKEY *pkey; + int (*i2d_func)_((DSA*, unsigned char**)); + unsigned char *p; + long len; + VALUE str; + + GetPKeyDSA(self, pkey); + if(DSA_HAS_PRIVATE(pkey->pkey.dsa)) + i2d_func = (int(*)_((DSA*,unsigned char**)))i2d_DSAPrivateKey; + else + i2d_func = i2d_DSA_PUBKEY; + if((len = i2d_func(pkey->pkey.dsa, NULL)) <= 0) + ossl_raise(eDSAError, NULL); + str = rb_str_new(0, len); + p = RSTRING(str)->ptr; + if(i2d_func(pkey->pkey.dsa, &p) < 0) + ossl_raise(eDSAError, NULL); + ossl_str_adjust(str, p); + + return str; +} + +/* + * Stores all parameters of key to the hash + * INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!! + * Don't use :-)) (I's up to you) + */ +static VALUE +ossl_dsa_get_params(VALUE self) +{ + EVP_PKEY *pkey; + VALUE hash; + + GetPKeyDSA(self, pkey); + + hash = rb_hash_new(); + + rb_hash_aset(hash, rb_str_new2("p"), ossl_bn_new(pkey->pkey.dsa->p)); + rb_hash_aset(hash, rb_str_new2("q"), ossl_bn_new(pkey->pkey.dsa->q)); + rb_hash_aset(hash, rb_str_new2("g"), ossl_bn_new(pkey->pkey.dsa->g)); + rb_hash_aset(hash, rb_str_new2("pub_key"), ossl_bn_new(pkey->pkey.dsa->pub_key)); + rb_hash_aset(hash, rb_str_new2("priv_key"), ossl_bn_new(pkey->pkey.dsa->priv_key)); + + return hash; +} + +/* + * Prints all parameters of key to buffer + * INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!! + * Don't use :-)) (I's up to you) + */ +static VALUE +ossl_dsa_to_text(VALUE self) +{ + EVP_PKEY *pkey; + BIO *out; + VALUE str; + + GetPKeyDSA(self, pkey); + if (!(out = BIO_new(BIO_s_mem()))) { + ossl_raise(eDSAError, NULL); + } + if (!DSA_print(out, pkey->pkey.dsa, 0)) { /* offset = 0 */ + BIO_free(out); + ossl_raise(eDSAError, NULL); + } + str = ossl_membio2str(out); + + return str; +} + +/* + * Makes new instance DSA PUBLIC_KEY from PRIVATE_KEY + */ +static VALUE +ossl_dsa_to_public_key(VALUE self) +{ + EVP_PKEY *pkey; + DSA *dsa; + VALUE obj; + + GetPKeyDSA(self, pkey); + /* err check performed by dsa_instance */ + dsa = DSAPublicKey_dup(pkey->pkey.dsa); + obj = dsa_instance(CLASS_OF(self), dsa); + if (obj == Qfalse) { + DSA_free(dsa); + ossl_raise(eDSAError, NULL); + } + return obj; +} + +#define ossl_dsa_buf_size(pkey) (DSA_size((pkey)->pkey.dsa)+16) + +static VALUE +ossl_dsa_sign(VALUE self, VALUE data) +{ + EVP_PKEY *pkey; + int buf_len; + VALUE str; + + GetPKeyDSA(self, pkey); + StringValue(data); + if (!DSA_PRIVATE(self, pkey->pkey.dsa)) { + ossl_raise(eDSAError, "Private DSA key needed!"); + } + str = rb_str_new(0, ossl_dsa_buf_size(pkey)); + if (!DSA_sign(0, RSTRING(data)->ptr, RSTRING(data)->len, RSTRING(str)->ptr, + &buf_len, pkey->pkey.dsa)) { /* type is ignored (0) */ + ossl_raise(eDSAError, NULL); + } + RSTRING(str)->len = buf_len; + RSTRING(str)->ptr[buf_len] = 0; + + return str; +} + +static VALUE +ossl_dsa_verify(VALUE self, VALUE digest, VALUE sig) +{ + EVP_PKEY *pkey; + int ret; + + GetPKeyDSA(self, pkey); + StringValue(digest); + StringValue(sig); + /* type is ignored (0) */ + ret = DSA_verify(0, RSTRING(digest)->ptr, RSTRING(digest)->len, + RSTRING(sig)->ptr, RSTRING(sig)->len, pkey->pkey.dsa); + if (ret < 0) { + ossl_raise(eDSAError, NULL); + } + else if (ret == 1) { + return Qtrue; + } + + return Qfalse; +} + +OSSL_PKEY_BN(dsa, p); +OSSL_PKEY_BN(dsa, q); +OSSL_PKEY_BN(dsa, g); +OSSL_PKEY_BN(dsa, pub_key); +OSSL_PKEY_BN(dsa, priv_key); + +/* + * INIT + */ +void +Init_ossl_dsa() +{ + eDSAError = rb_define_class_under(mPKey, "DSAError", ePKeyError); + + cDSA = rb_define_class_under(mPKey, "DSA", cPKey); + + rb_define_singleton_method(cDSA, "generate", ossl_dsa_s_generate, 1); + rb_define_method(cDSA, "initialize", ossl_dsa_initialize, -1); + + rb_define_method(cDSA, "public?", ossl_dsa_is_public, 0); + rb_define_method(cDSA, "private?", ossl_dsa_is_private, 0); + rb_define_method(cDSA, "to_text", ossl_dsa_to_text, 0); + rb_define_method(cDSA, "export", ossl_dsa_export, -1); + rb_define_alias(cDSA, "to_pem", "export"); + rb_define_alias(cDSA, "to_s", "export"); + rb_define_method(cDSA, "to_der", ossl_dsa_to_der, 0); + rb_define_method(cDSA, "public_key", ossl_dsa_to_public_key, 0); + rb_define_method(cDSA, "syssign", ossl_dsa_sign, 1); + rb_define_method(cDSA, "sysverify", ossl_dsa_verify, 2); + + DEF_OSSL_PKEY_BN(cDSA, dsa, p); + DEF_OSSL_PKEY_BN(cDSA, dsa, q); + DEF_OSSL_PKEY_BN(cDSA, dsa, g); + DEF_OSSL_PKEY_BN(cDSA, dsa, pub_key); + DEF_OSSL_PKEY_BN(cDSA, dsa, priv_key); + + rb_define_method(cDSA, "params", ossl_dsa_get_params, 0); +} + +#else /* defined NO_DSA */ +# warning >>> OpenSSL is compiled without DSA support <<< + +void +Init_ossl_dsa() +{ + rb_warning("OpenSSL is compiled without DSA support"); +} + +#endif /* NO_DSA */ |