diff options
Diffstat (limited to 'trunk/ext/openssl/ossl_pkey_rsa.c')
| -rw-r--r-- | trunk/ext/openssl/ossl_pkey_rsa.c | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/trunk/ext/openssl/ossl_pkey_rsa.c b/trunk/ext/openssl/ossl_pkey_rsa.c new file mode 100644 index 0000000000..52f5555f97 --- /dev/null +++ b/trunk/ext/openssl/ossl_pkey_rsa.c @@ -0,0 +1,593 @@ +/* + * $Id$ + * '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_RSA) + +#include "ossl.h" + +#define GetPKeyRSA(obj, pkey) do { \ + GetPKey(obj, pkey); \ + if (EVP_PKEY_type(pkey->type) != EVP_PKEY_RSA) { /* PARANOIA? */ \ + ossl_raise(rb_eRuntimeError, "THIS IS NOT A RSA!") ; \ + } \ +} while (0) + +#define RSA_HAS_PRIVATE(rsa) ((rsa)->p && (rsa)->q) +#define RSA_PRIVATE(obj,rsa) (RSA_HAS_PRIVATE(rsa)||OSSL_PKEY_IS_PRIVATE(obj)) + +/* + * Classes + */ +VALUE cRSA; +VALUE eRSAError; + +/* + * Public + */ +static VALUE +rsa_instance(VALUE klass, RSA *rsa) +{ + EVP_PKEY *pkey; + VALUE obj; + + if (!rsa) { + return Qfalse; + } + if (!(pkey = EVP_PKEY_new())) { + return Qfalse; + } + if (!EVP_PKEY_assign_RSA(pkey, rsa)) { + EVP_PKEY_free(pkey); + return Qfalse; + } + WrapPKey(klass, obj, pkey); + + return obj; +} + +VALUE +ossl_rsa_new(EVP_PKEY *pkey) +{ + VALUE obj; + + if (!pkey) { + obj = rsa_instance(cRSA, RSA_new()); + } + else { + if (EVP_PKEY_type(pkey->type) != EVP_PKEY_RSA) { + ossl_raise(rb_eTypeError, "Not a RSA key!"); + } + WrapPKey(cRSA, obj, pkey); + } + if (obj == Qfalse) { + ossl_raise(eRSAError, NULL); + } + + return obj; +} + +/* + * Private + */ +static RSA * +rsa_generate(int size, int exp) +{ + return RSA_generate_key(size, exp, + rb_block_given_p() ? ossl_generate_cb : NULL, + NULL); +} + +/* + * call-seq: + * RSA.generate(size [, exponent]) -> rsa + * + * === Parameters + * * +size+ is an integer representing the desired key size. Keys smaller than 1024 should be considered insecure. + * * +exponent+ is an odd number normally 3, 17, or 65537. + * + */ +static VALUE +ossl_rsa_s_generate(int argc, VALUE *argv, VALUE klass) +{ +/* why does this method exist? why can't initialize take an optional exponent? */ + RSA *rsa; + VALUE size, exp; + VALUE obj; + + rb_scan_args(argc, argv, "11", &size, &exp); + + rsa = rsa_generate(NUM2INT(size), NIL_P(exp) ? RSA_F4 : NUM2INT(exp)); /* err handled by rsa_instance */ + obj = rsa_instance(klass, rsa); + + if (obj == Qfalse) { + RSA_free(rsa); + ossl_raise(eRSAError, NULL); + } + + return obj; +} + +/* + * call-seq: + * RSA.new([size | encoded_key] [, pass]) -> rsa + * + * === Parameters + * * +size+ is an integer representing the desired key size. + * * +encoded_key+ is a string containing PEM or DER encoded key. + * * +pass+ is an optional string with the password to decrypt the encoded key. + * + * === Examples + * * RSA.new(2048) -> rsa + * * RSA.new(File.read("rsa.pem")) -> rsa + * * RSA.new(File.read("rsa.pem"), "mypassword") -> rsa + */ +static VALUE +ossl_rsa_initialize(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + RSA *rsa; + BIO *in; + char *passwd = NULL; + VALUE arg, pass; + + GetPKey(self, pkey); + if(rb_scan_args(argc, argv, "02", &arg, &pass) == 0) { + rsa = RSA_new(); + } + else if (FIXNUM_P(arg)) { + rsa = rsa_generate(FIX2INT(arg), NIL_P(pass) ? RSA_F4 : NUM2INT(pass)); + if (!rsa) ossl_raise(eRSAError, NULL); + } + else { + if (!NIL_P(pass)) passwd = StringValuePtr(pass); + arg = ossl_to_der_if_possible(arg); + in = ossl_obj2bio(arg); + rsa = PEM_read_bio_RSAPrivateKey(in, NULL, ossl_pem_passwd_cb, passwd); + if (!rsa) { + (void)BIO_reset(in); + rsa = PEM_read_bio_RSAPublicKey(in, NULL, NULL, NULL); + } + if (!rsa) { + (void)BIO_reset(in); + rsa = PEM_read_bio_RSA_PUBKEY(in, NULL, NULL, NULL); + } + if (!rsa) { + (void)BIO_reset(in); + rsa = d2i_RSAPrivateKey_bio(in, NULL); + } + if (!rsa) { + (void)BIO_reset(in); + rsa = d2i_RSAPublicKey_bio(in, NULL); + } + if (!rsa) { + (void)BIO_reset(in); + rsa = d2i_RSA_PUBKEY_bio(in, NULL); + } + BIO_free(in); + if (!rsa) ossl_raise(eRSAError, "Neither PUB key nor PRIV key:"); + } + if (!EVP_PKEY_assign_RSA(pkey, rsa)) { + RSA_free(rsa); + ossl_raise(eRSAError, NULL); + } + + return self; +} + +/* + * call-seq: + * rsa.public? -> true + * + * The return value is always true since every private key is also a public key. + * + */ +static VALUE +ossl_rsa_is_public(VALUE self) +{ + EVP_PKEY *pkey; + + GetPKeyRSA(self, pkey); + /* + * This method should check for n and e. BUG. + */ + return Qtrue; +} + +/* + * call-seq: + * rsa.private? -> true | false + * + */ +static VALUE +ossl_rsa_is_private(VALUE self) +{ + EVP_PKEY *pkey; + + GetPKeyRSA(self, pkey); + + return (RSA_PRIVATE(self, pkey->pkey.rsa)) ? Qtrue : Qfalse; +} + +/* + * call-seq: + * rsa.to_pem([cipher, pass]) -> aString + * + * === Parameters + * * +cipher+ is a Cipher object. + * * +pass+ is a string. + * + * === Examples + * * rsa.to_pem -> aString + * * rsa.to_pem(cipher, pass) -> aString + */ +static VALUE +ossl_rsa_export(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + BIO *out; + const EVP_CIPHER *ciph = NULL; + char *passwd = NULL; + VALUE cipher, pass, str; + + GetPKeyRSA(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(eRSAError, NULL); + } + if (RSA_HAS_PRIVATE(pkey->pkey.rsa)) { + if (!PEM_write_bio_RSAPrivateKey(out, pkey->pkey.rsa, ciph, + NULL, 0, ossl_pem_passwd_cb, passwd)) { + BIO_free(out); + ossl_raise(eRSAError, NULL); + } + } else { + if (!PEM_write_bio_RSAPublicKey(out, pkey->pkey.rsa)) { + BIO_free(out); + ossl_raise(eRSAError, NULL); + } + } + str = ossl_membio2str(out); + + return str; +} + +/* + * call-seq: + * rsa.to_der -> aString + * + */ +static VALUE +ossl_rsa_to_der(VALUE self) +{ + EVP_PKEY *pkey; + int (*i2d_func)_((const RSA*, unsigned char**)); + unsigned char *p; + long len; + VALUE str; + + GetPKeyRSA(self, pkey); + if(RSA_HAS_PRIVATE(pkey->pkey.rsa)) + i2d_func = i2d_RSAPrivateKey; + else + i2d_func = i2d_RSAPublicKey; + if((len = i2d_func(pkey->pkey.rsa, NULL)) <= 0) + ossl_raise(eRSAError, NULL); + str = rb_str_new(0, len); + p = (unsigned char *)RSTRING_PTR(str); + if(i2d_func(pkey->pkey.rsa, &p) < 0) + ossl_raise(eRSAError, NULL); + ossl_str_adjust(str, p); + + return str; +} + +#define ossl_rsa_buf_size(pkey) (RSA_size((pkey)->pkey.rsa)+16) + +/* + * call-seq: + * rsa.public_encrypt(string [, padding]) -> aString + * + */ +static VALUE +ossl_rsa_public_encrypt(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + int buf_len, pad; + VALUE str, buffer, padding; + + GetPKeyRSA(self, pkey); + rb_scan_args(argc, argv, "11", &buffer, &padding); + pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); + StringValue(buffer); + str = rb_str_new(0, ossl_rsa_buf_size(pkey)); + buf_len = RSA_public_encrypt(RSTRING_LEN(buffer), (unsigned char *)RSTRING_PTR(buffer), + (unsigned char *)RSTRING_PTR(str), pkey->pkey.rsa, + pad); + if (buf_len < 0) ossl_raise(eRSAError, NULL); + rb_str_set_len(str, buf_len); + + return str; +} + +/* + * call-seq: + * rsa.public_decrypt(string [, padding]) -> aString + * + */ +static VALUE +ossl_rsa_public_decrypt(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + int buf_len, pad; + VALUE str, buffer, padding; + + GetPKeyRSA(self, pkey); + rb_scan_args(argc, argv, "11", &buffer, &padding); + pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); + StringValue(buffer); + str = rb_str_new(0, ossl_rsa_buf_size(pkey)); + buf_len = RSA_public_decrypt(RSTRING_LEN(buffer), (unsigned char *)RSTRING_PTR(buffer), + (unsigned char *)RSTRING_PTR(str), pkey->pkey.rsa, + pad); + if (buf_len < 0) ossl_raise(eRSAError, NULL); + rb_str_set_len(str, buf_len); + + return str; +} + +/* + * call-seq: + * rsa.private_encrypt(string [, padding]) -> aString + * + */ +static VALUE +ossl_rsa_private_encrypt(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + int buf_len, pad; + VALUE str, buffer, padding; + + GetPKeyRSA(self, pkey); + if (!RSA_PRIVATE(self, pkey->pkey.rsa)) { + ossl_raise(eRSAError, "private key needed."); + } + rb_scan_args(argc, argv, "11", &buffer, &padding); + pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); + StringValue(buffer); + str = rb_str_new(0, ossl_rsa_buf_size(pkey)); + buf_len = RSA_private_encrypt(RSTRING_LEN(buffer), (unsigned char *)RSTRING_PTR(buffer), + (unsigned char *)RSTRING_PTR(str), pkey->pkey.rsa, + pad); + if (buf_len < 0) ossl_raise(eRSAError, NULL); + rb_str_set_len(str, buf_len); + + return str; +} + + +/* + * call-seq: + * rsa.private_decrypt(string [, padding]) -> aString + * + */ +static VALUE +ossl_rsa_private_decrypt(int argc, VALUE *argv, VALUE self) +{ + EVP_PKEY *pkey; + int buf_len, pad; + VALUE str, buffer, padding; + + GetPKeyRSA(self, pkey); + if (!RSA_PRIVATE(self, pkey->pkey.rsa)) { + ossl_raise(eRSAError, "private key needed."); + } + rb_scan_args(argc, argv, "11", &buffer, &padding); + pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); + StringValue(buffer); + str = rb_str_new(0, ossl_rsa_buf_size(pkey)); + buf_len = RSA_private_decrypt(RSTRING_LEN(buffer), (unsigned char *)RSTRING_PTR(buffer), + (unsigned char *)RSTRING_PTR(str), pkey->pkey.rsa, + pad); + if (buf_len < 0) ossl_raise(eRSAError, NULL); + rb_str_set_len(str, buf_len); + + return str; +} + +/* + * call-seq: + * rsa.params -> hash + * + * 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_rsa_get_params(VALUE self) +{ + EVP_PKEY *pkey; + VALUE hash; + + GetPKeyRSA(self, pkey); + + hash = rb_hash_new(); + + rb_hash_aset(hash, rb_str_new2("n"), ossl_bn_new(pkey->pkey.rsa->n)); + rb_hash_aset(hash, rb_str_new2("e"), ossl_bn_new(pkey->pkey.rsa->e)); + rb_hash_aset(hash, rb_str_new2("d"), ossl_bn_new(pkey->pkey.rsa->d)); + rb_hash_aset(hash, rb_str_new2("p"), ossl_bn_new(pkey->pkey.rsa->p)); + rb_hash_aset(hash, rb_str_new2("q"), ossl_bn_new(pkey->pkey.rsa->q)); + rb_hash_aset(hash, rb_str_new2("dmp1"), ossl_bn_new(pkey->pkey.rsa->dmp1)); + rb_hash_aset(hash, rb_str_new2("dmq1"), ossl_bn_new(pkey->pkey.rsa->dmq1)); + rb_hash_aset(hash, rb_str_new2("iqmp"), ossl_bn_new(pkey->pkey.rsa->iqmp)); + + return hash; +} + +/* + * call-seq: + * rsa.to_text -> aString + * + * Prints all parameters of key to buffer + * INSECURE: PRIVATE INFORMATIONS CAN LEAK OUT!!! + * Don't use :-)) (It's up to you) + */ +static VALUE +ossl_rsa_to_text(VALUE self) +{ + EVP_PKEY *pkey; + BIO *out; + VALUE str; + + GetPKeyRSA(self, pkey); + if (!(out = BIO_new(BIO_s_mem()))) { + ossl_raise(eRSAError, NULL); + } + if (!RSA_print(out, pkey->pkey.rsa, 0)) { /* offset = 0 */ + BIO_free(out); + ossl_raise(eRSAError, NULL); + } + str = ossl_membio2str(out); + + return str; +} + +/* + * call-seq: + * rsa.public_key -> aRSA + * + * Makes new instance RSA PUBLIC_KEY from PRIVATE_KEY + */ +static VALUE +ossl_rsa_to_public_key(VALUE self) +{ + EVP_PKEY *pkey; + RSA *rsa; + VALUE obj; + + GetPKeyRSA(self, pkey); + /* err check performed by rsa_instance */ + rsa = RSAPublicKey_dup(pkey->pkey.rsa); + obj = rsa_instance(CLASS_OF(self), rsa); + if (obj == Qfalse) { + RSA_free(rsa); + ossl_raise(eRSAError, NULL); + } + return obj; +} + +/* + * TODO: Test me + +static VALUE +ossl_rsa_blinding_on(VALUE self) +{ + EVP_PKEY *pkey; + + GetPKeyRSA(self, pkey); + + if (RSA_blinding_on(pkey->pkey.rsa, ossl_bn_ctx) != 1) { + ossl_raise(eRSAError, NULL); + } + return self; +} + +static VALUE +ossl_rsa_blinding_off(VALUE self) +{ + EVP_PKEY *pkey; + + GetPKeyRSA(self, pkey); + RSA_blinding_off(pkey->pkey.rsa); + + return self; +} + */ + +OSSL_PKEY_BN(rsa, n); +OSSL_PKEY_BN(rsa, e); +OSSL_PKEY_BN(rsa, d); +OSSL_PKEY_BN(rsa, p); +OSSL_PKEY_BN(rsa, q); +OSSL_PKEY_BN(rsa, dmp1); +OSSL_PKEY_BN(rsa, dmq1); +OSSL_PKEY_BN(rsa, iqmp); + +/* + * INIT + */ +#define DefRSAConst(x) rb_define_const(cRSA, #x,INT2FIX(RSA_##x)) + +void +Init_ossl_rsa() +{ +#if 0 /* let rdoc know about mOSSL and mPKey */ + mOSSL = rb_define_module("OpenSSL"); + mPKey = rb_define_module_under(mOSSL, "PKey"); +#endif + + eRSAError = rb_define_class_under(mPKey, "RSAError", ePKeyError); + + cRSA = rb_define_class_under(mPKey, "RSA", cPKey); + + rb_define_singleton_method(cRSA, "generate", ossl_rsa_s_generate, -1); + rb_define_method(cRSA, "initialize", ossl_rsa_initialize, -1); + + rb_define_method(cRSA, "public?", ossl_rsa_is_public, 0); + rb_define_method(cRSA, "private?", ossl_rsa_is_private, 0); + rb_define_method(cRSA, "to_text", ossl_rsa_to_text, 0); + rb_define_method(cRSA, "export", ossl_rsa_export, -1); + rb_define_alias(cRSA, "to_pem", "export"); + rb_define_alias(cRSA, "to_s", "export"); + rb_define_method(cRSA, "to_der", ossl_rsa_to_der, 0); + rb_define_method(cRSA, "public_key", ossl_rsa_to_public_key, 0); + rb_define_method(cRSA, "public_encrypt", ossl_rsa_public_encrypt, -1); + rb_define_method(cRSA, "public_decrypt", ossl_rsa_public_decrypt, -1); + rb_define_method(cRSA, "private_encrypt", ossl_rsa_private_encrypt, -1); + rb_define_method(cRSA, "private_decrypt", ossl_rsa_private_decrypt, -1); + + DEF_OSSL_PKEY_BN(cRSA, rsa, n); + DEF_OSSL_PKEY_BN(cRSA, rsa, e); + DEF_OSSL_PKEY_BN(cRSA, rsa, d); + DEF_OSSL_PKEY_BN(cRSA, rsa, p); + DEF_OSSL_PKEY_BN(cRSA, rsa, q); + DEF_OSSL_PKEY_BN(cRSA, rsa, dmp1); + DEF_OSSL_PKEY_BN(cRSA, rsa, dmq1); + DEF_OSSL_PKEY_BN(cRSA, rsa, iqmp); + + rb_define_method(cRSA, "params", ossl_rsa_get_params, 0); + + DefRSAConst(PKCS1_PADDING); + DefRSAConst(SSLV23_PADDING); + DefRSAConst(NO_PADDING); + DefRSAConst(PKCS1_OAEP_PADDING); + +/* + * TODO: Test it + rb_define_method(cRSA, "blinding_on!", ossl_rsa_blinding_on, 0); + rb_define_method(cRSA, "blinding_off!", ossl_rsa_blinding_off, 0); + */ +} + +#else /* defined NO_RSA */ +void +Init_ossl_rsa() +{ +} +#endif /* NO_RSA */ + |