/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project 2006. */ /* ==================================================================== * Copyright (c) 2006 The OpenSSL Project. All rights reserved. * * 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 above 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 acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED 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 OpenSSL PROJECT OR * ITS 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. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include <stdio.h> #include "cryptlib.h" #include <openssl/x509.h> #include <openssl/asn1.h> #include <openssl/dsa.h> #include <openssl/bn.h> #ifndef OPENSSL_NO_CMS #include <openssl/cms.h> #endif #include "asn1_locl.h" static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) { const unsigned char *p, *pm; int pklen, pmlen; int ptype; void *pval; ASN1_STRING *pstr; X509_ALGOR *palg; ASN1_INTEGER *public_key = NULL; DSA *dsa = NULL; if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) return 0; X509_ALGOR_get0(NULL, &ptype, &pval, palg); if (ptype == V_ASN1_SEQUENCE) { pstr = pval; pm = pstr->data; pmlen = pstr->length; if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) { DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR); goto err; } } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) { if (!(dsa = DSA_new())) { DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE); goto err; } } else { DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR); goto err; } if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen))) { DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR); goto err; } if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR); goto err; } ASN1_INTEGER_free(public_key); EVP_PKEY_assign_DSA(pkey, dsa); return 1; err: if (public_key) ASN1_INTEGER_free(public_key); if (dsa) DSA_free(dsa); return 0; } static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) { DSA *dsa; void *pval = NULL; int ptype; unsigned char *penc = NULL; int penclen; dsa=pkey->pkey.dsa; if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) { ASN1_STRING *str; str = ASN1_STRING_new(); str->length = i2d_DSAparams(dsa, &str->data); if (str->length <= 0) { DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); goto err; } pval = str; ptype = V_ASN1_SEQUENCE; } else ptype = V_ASN1_UNDEF; dsa->write_params=0; penclen = i2d_DSAPublicKey(dsa, &penc); if (penclen <= 0) { DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); goto err; } if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA), ptype, pval, penc, penclen)) return 1; err: if (penc) OPENSSL_free(penc); if (pval) ASN1_STRING_free(pval); return 0; } /* In PKCS#8 DSA: you just get a private key integer and parameters in the * AlgorithmIdentifier the pubkey must be recalculated. */ static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) { const unsigned char *p, *pm; int pklen, pmlen; int ptype; void *pval; ASN1_STRING *pstr; X509_ALGOR *palg; ASN1_INTEGER *privkey = NULL; BN_CTX *ctx = NULL; STACK_OF(ASN1_TYPE) *ndsa = NULL; DSA *dsa = NULL; if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) return 0; X509_ALGOR_get0(NULL, &ptype, &pval, palg); /* Check for broken DSA PKCS#8, UGH! */ if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED)) { ASN1_TYPE *t1, *t2; if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen))) goto decerr; if (sk_ASN1_TYPE_num(ndsa) != 2) goto decerr; /* Handle Two broken types: * SEQUENCE {parameters, priv_key} * SEQUENCE {pub_key, priv_key} */ t1 = sk_ASN1_TYPE_value(ndsa, 0); t2 = sk_ASN1_TYPE_value(ndsa, 1); if (t1->type == V_ASN1_SEQUENCE) { p8->broken = PKCS8_EMBEDDED_PARAM; pval = t1->value.ptr; } else if (ptype == V_ASN1_SEQUENCE) p8->broken = PKCS8_NS_DB; else goto decerr; if (t2->type != V_ASN1_INTEGER) goto decerr; privkey = t2->value.integer; } else { const unsigned char *q = p; if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen))) goto decerr; if (privkey->type == V_ASN1_NEG_INTEGER) { p8->broken = PKCS8_NEG_PRIVKEY; ASN1_INTEGER_free(privkey); if (!(privkey=d2i_ASN1_UINTEGER(NULL, &q, pklen))) goto decerr; } if (ptype != V_ASN1_SEQUENCE) goto decerr; } pstr = pval; pm = pstr->data; pmlen = pstr->length; if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) goto decerr; /* We have parameters now set private key */ if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) { DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR); goto dsaerr; } /* Calculate public key */ if (!(dsa->pub_key = BN_new())) { DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE); goto dsaerr; } if (!(ctx = BN_CTX_new())) { DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE); goto dsaerr; } if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) { DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR); goto dsaerr; } EVP_PKEY_assign_DSA(pkey, dsa); BN_CTX_free (ctx); if(ndsa) sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free); else ASN1_INTEGER_free(privkey); return 1; decerr: DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR); dsaerr: BN_CTX_free (ctx); if (privkey) ASN1_INTEGER_free(privkey); sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free); DSA_free(dsa); return 0; } static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) { ASN1_STRING *params = NULL; ASN1_INTEGER *prkey = NULL; unsigned char *dp = NULL; int dplen; params = ASN1_STRING_new(); if (!params) { DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE); goto err; } params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data); if (params->length <= 0) { DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE); goto err; } params->type = V_ASN1_SEQUENCE; /* Get private key into integer */ prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL); if (!prkey) { DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR); goto err; } dplen = i2d_ASN1_INTEGER(prkey, &dp); ASN1_INTEGER_free(prkey); if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0, V_ASN1_SEQUENCE, params, dp, dplen)) goto err; return 1; err: if (dp != NULL) OPENSSL_free(dp); if (params != NULL) ASN1_STRING_free(params); if (prkey != NULL) ASN1_INTEGER_free(prkey); return 0; } static int int_dsa_size(const EVP_PKEY *pkey) { return(DSA_size(pkey->pkey.dsa)); } static int dsa_bits(const EVP_PKEY *pkey) { return BN_num_bits(pkey->pkey.dsa->p); } static int dsa_missing_parameters(const EVP_PKEY *pkey) { DSA *dsa; dsa=pkey->pkey.dsa; if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL)) return 1; return 0; } static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) { BIGNUM *a; if ((a=BN_dup(from->pkey.dsa->p)) == NULL) return 0; if (to->pkey.dsa->p != NULL) BN_free(to->pkey.dsa->p); to->pkey.dsa->p=a; if ((a=BN_dup(from->pkey.dsa->q)) == NULL) return 0; if (to->pkey.dsa->q != NULL) BN_free(to->pkey.dsa->q); to->pkey.dsa->q=a; if ((a=BN_dup(from->pkey.dsa->g)) == NULL) return 0; if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g); to->pkey.dsa->g=a; return 1; } static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) { if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) || BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) || BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g)) return 0; else return 1; } static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) { if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0) return 0; else return 1; } static void int_dsa_free(EVP_PKEY *pkey) { DSA_free(pkey->pkey.dsa); } static void update_buflen(const BIGNUM *b, size_t *pbuflen) { size_t i; if (!b) return; if (*pbuflen < (i = (size_t)BN_num_bytes(b))) *pbuflen = i; } static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype) { unsigned char *m=NULL; int ret=0; size_t buf_len=0; const char *ktype = NULL; const BIGNUM *priv_key, *pub_key; if (ptype == 2) priv_key = x->priv_key; else priv_key = NULL; if (ptype > 0) pub_key = x->pub_key; else pub_key = NULL; if (ptype == 2) ktype = "Private-Key"; else if (ptype == 1) ktype = "Public-Key"; else ktype = "DSA-Parameters"; update_buflen(x->p, &buf_len); update_buflen(x->q, &buf_len); update_buflen(x->g, &buf_len); update_buflen(priv_key, &buf_len); update_buflen(pub_key, &buf_len); m=(unsigned char *)OPENSSL_malloc(buf_len+10); if (m == NULL) { DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE); goto err; } if (priv_key) { if(!BIO_indent(bp,off,128)) goto err; if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p)) <= 0) goto err; } if (!ASN1_bn_print(bp,"priv:",priv_key,m,off)) goto err; if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off)) goto err; if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err; if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err; if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err; ret=1; err: if (m != NULL) OPENSSL_free(m); return(ret); } static int dsa_param_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen) { DSA *dsa; if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) { DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB); return 0; } EVP_PKEY_assign_DSA(pkey, dsa); return 1; } static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder) { return i2d_DSAparams(pkey->pkey.dsa, pder); } static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx) { return do_dsa_print(bp, pkey->pkey.dsa, indent, 0); } static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx) { return do_dsa_print(bp, pkey->pkey.dsa, indent, 1); } static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx) { return do_dsa_print(bp, pkey->pkey.dsa, indent, 2); } static int old_dsa_priv_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen) { DSA *dsa; if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen))) { DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB); return 0; } EVP_PKEY_assign_DSA(pkey, dsa); return 1; } static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) { return i2d_DSAPrivateKey(pkey->pkey.dsa, pder); } static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) { DSA_SIG *dsa_sig; const unsigned char *p; if (!sig) { if (BIO_puts(bp, "\n") <= 0) return 0; else return 1; } p = sig->data; dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length); if (dsa_sig) { int rv = 0; size_t buf_len = 0; unsigned char *m=NULL; update_buflen(dsa_sig->r, &buf_len); update_buflen(dsa_sig->s, &buf_len); m = OPENSSL_malloc(buf_len+10); if (m == NULL) { DSAerr(DSA_F_DSA_SIG_PRINT,ERR_R_MALLOC_FAILURE); goto err; } if (BIO_write(bp, "\n", 1) != 1) goto err; if (!ASN1_bn_print(bp,"r: ",dsa_sig->r,m,indent)) goto err; if (!ASN1_bn_print(bp,"s: ",dsa_sig->s,m,indent)) goto err; rv = 1; err: if (m) OPENSSL_free(m); DSA_SIG_free(dsa_sig); return rv; } return X509_signature_dump(bp, sig, indent); } static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) { switch (op) { case ASN1_PKEY_CTRL_PKCS7_SIGN: if (arg1 == 0) { int snid, hnid; X509_ALGOR *alg1, *alg2; PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2); if (alg1 == NULL || alg1->algorithm == NULL) return -1; hnid = OBJ_obj2nid(alg1->algorithm); if (hnid == NID_undef) return -1; if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) return -1; X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); } return 1; #ifndef OPENSSL_NO_CMS case ASN1_PKEY_CTRL_CMS_SIGN: if (arg1 == 0) { int snid, hnid; X509_ALGOR *alg1, *alg2; CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2); if (alg1 == NULL || alg1->algorithm == NULL) return -1; hnid = OBJ_obj2nid(alg1->algorithm); if (hnid == NID_undef) return -1; if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) return -1; X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); } return 1; #endif case ASN1_PKEY_CTRL_DEFAULT_MD_NID: *(int *)arg2 = NID_sha1; return 2; default: return -2; } } /* NB these are sorted in pkey_id order, lowest first */ const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = { { EVP_PKEY_DSA2, EVP_PKEY_DSA, ASN1_PKEY_ALIAS }, { EVP_PKEY_DSA1, EVP_PKEY_DSA, ASN1_PKEY_ALIAS }, { EVP_PKEY_DSA4, EVP_PKEY_DSA, ASN1_PKEY_ALIAS }, { EVP_PKEY_DSA3, EVP_PKEY_DSA, ASN1_PKEY_ALIAS }, { EVP_PKEY_DSA, EVP_PKEY_DSA, 0, "DSA", "OpenSSL DSA method", dsa_pub_decode, dsa_pub_encode, dsa_pub_cmp, dsa_pub_print, dsa_priv_decode, dsa_priv_encode, dsa_priv_print, int_dsa_size, dsa_bits, dsa_param_decode, dsa_param_encode, dsa_missing_parameters, dsa_copy_parameters, dsa_cmp_parameters, dsa_param_print, dsa_sig_print, int_dsa_free, dsa_pkey_ctrl, old_dsa_priv_decode, old_dsa_priv_encode } };