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308 lines
8.9 KiB
308 lines
8.9 KiB
/* |
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project |
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* 2006. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <stdio.h> |
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#include "cryptlib.h" |
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#include <openssl/asn1t.h> |
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#include <openssl/x509.h> |
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#include <openssl/evp.h> |
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#include <openssl/bn.h> |
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#include "evp_locl.h" |
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#include "dsa_locl.h" |
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/* DSA pkey context structure */ |
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typedef struct { |
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/* Parameter gen parameters */ |
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int nbits; /* size of p in bits (default: 1024) */ |
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int qbits; /* size of q in bits (default: 160) */ |
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const EVP_MD *pmd; /* MD for parameter generation */ |
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/* Keygen callback info */ |
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int gentmp[2]; |
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/* message digest */ |
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const EVP_MD *md; /* MD for the signature */ |
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} DSA_PKEY_CTX; |
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static int pkey_dsa_init(EVP_PKEY_CTX *ctx) |
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{ |
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DSA_PKEY_CTX *dctx; |
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dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX)); |
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if (!dctx) |
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return 0; |
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dctx->nbits = 1024; |
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dctx->qbits = 160; |
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dctx->pmd = NULL; |
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dctx->md = NULL; |
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ctx->data = dctx; |
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ctx->keygen_info = dctx->gentmp; |
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ctx->keygen_info_count = 2; |
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return 1; |
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} |
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static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) |
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{ |
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DSA_PKEY_CTX *dctx, *sctx; |
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if (!pkey_dsa_init(dst)) |
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return 0; |
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sctx = src->data; |
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dctx = dst->data; |
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dctx->nbits = sctx->nbits; |
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dctx->qbits = sctx->qbits; |
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dctx->pmd = sctx->pmd; |
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dctx->md = sctx->md; |
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return 1; |
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} |
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static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx) |
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{ |
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DSA_PKEY_CTX *dctx = ctx->data; |
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if (dctx) |
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OPENSSL_free(dctx); |
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} |
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static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, |
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size_t *siglen, const unsigned char *tbs, |
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size_t tbslen) |
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{ |
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int ret, type; |
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unsigned int sltmp; |
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DSA_PKEY_CTX *dctx = ctx->data; |
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DSA *dsa = ctx->pkey->pkey.dsa; |
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if (dctx->md) |
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type = EVP_MD_type(dctx->md); |
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else |
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type = NID_sha1; |
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ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa); |
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if (ret <= 0) |
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return ret; |
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*siglen = sltmp; |
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return 1; |
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} |
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static int pkey_dsa_verify(EVP_PKEY_CTX *ctx, |
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const unsigned char *sig, size_t siglen, |
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const unsigned char *tbs, size_t tbslen) |
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{ |
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int ret, type; |
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DSA_PKEY_CTX *dctx = ctx->data; |
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DSA *dsa = ctx->pkey->pkey.dsa; |
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if (dctx->md) |
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type = EVP_MD_type(dctx->md); |
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else |
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type = NID_sha1; |
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ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa); |
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return ret; |
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} |
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static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) |
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{ |
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DSA_PKEY_CTX *dctx = ctx->data; |
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switch (type) { |
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case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS: |
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if (p1 < 256) |
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return -2; |
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dctx->nbits = p1; |
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return 1; |
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case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS: |
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if (p1 != 160 && p1 != 224 && p1 && p1 != 256) |
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return -2; |
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dctx->qbits = p1; |
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return 1; |
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case EVP_PKEY_CTRL_DSA_PARAMGEN_MD: |
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if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 && |
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EVP_MD_type((const EVP_MD *)p2) != NID_sha224 && |
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EVP_MD_type((const EVP_MD *)p2) != NID_sha256) { |
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DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE); |
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return 0; |
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} |
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dctx->md = p2; |
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return 1; |
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case EVP_PKEY_CTRL_MD: |
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if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 && |
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EVP_MD_type((const EVP_MD *)p2) != NID_dsa && |
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EVP_MD_type((const EVP_MD *)p2) != NID_dsaWithSHA && |
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EVP_MD_type((const EVP_MD *)p2) != NID_sha224 && |
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EVP_MD_type((const EVP_MD *)p2) != NID_sha256 && |
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EVP_MD_type((const EVP_MD *)p2) != NID_sha384 && |
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EVP_MD_type((const EVP_MD *)p2) != NID_sha512) { |
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DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE); |
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return 0; |
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} |
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dctx->md = p2; |
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return 1; |
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case EVP_PKEY_CTRL_DIGESTINIT: |
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case EVP_PKEY_CTRL_PKCS7_SIGN: |
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case EVP_PKEY_CTRL_CMS_SIGN: |
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return 1; |
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case EVP_PKEY_CTRL_PEER_KEY: |
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DSAerr(DSA_F_PKEY_DSA_CTRL, |
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EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); |
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return -2; |
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default: |
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return -2; |
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} |
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} |
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static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx, |
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const char *type, const char *value) |
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{ |
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if (!strcmp(type, "dsa_paramgen_bits")) { |
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int nbits; |
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nbits = atoi(value); |
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return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits); |
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} |
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if (!strcmp(type, "dsa_paramgen_q_bits")) { |
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int qbits = atoi(value); |
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, |
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EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits, |
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NULL); |
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} |
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if (!strcmp(type, "dsa_paramgen_md")) { |
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN, |
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EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0, |
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(void *)EVP_get_digestbyname(value)); |
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} |
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return -2; |
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} |
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static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) |
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{ |
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DSA *dsa = NULL; |
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DSA_PKEY_CTX *dctx = ctx->data; |
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BN_GENCB *pcb, cb; |
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int ret; |
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if (ctx->pkey_gencb) { |
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pcb = &cb; |
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evp_pkey_set_cb_translate(pcb, ctx); |
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} else |
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pcb = NULL; |
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dsa = DSA_new(); |
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if (!dsa) |
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return 0; |
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ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd, |
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NULL, 0, NULL, NULL, NULL, pcb); |
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if (ret) |
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EVP_PKEY_assign_DSA(pkey, dsa); |
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else |
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DSA_free(dsa); |
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return ret; |
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} |
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static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) |
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{ |
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DSA *dsa = NULL; |
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if (ctx->pkey == NULL) { |
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DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET); |
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return 0; |
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} |
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dsa = DSA_new(); |
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if (!dsa) |
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return 0; |
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EVP_PKEY_assign_DSA(pkey, dsa); |
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/* Note: if error return, pkey is freed by parent routine */ |
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if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey)) |
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return 0; |
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return DSA_generate_key(pkey->pkey.dsa); |
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} |
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const EVP_PKEY_METHOD dsa_pkey_meth = { |
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EVP_PKEY_DSA, |
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EVP_PKEY_FLAG_AUTOARGLEN, |
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pkey_dsa_init, |
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pkey_dsa_copy, |
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pkey_dsa_cleanup, |
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0, |
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pkey_dsa_paramgen, |
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0, |
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pkey_dsa_keygen, |
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0, |
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pkey_dsa_sign, |
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0, |
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pkey_dsa_verify, |
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0, 0, |
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0, 0, 0, 0, |
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0, 0, |
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0, 0, |
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0, 0, |
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pkey_dsa_ctrl, |
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pkey_dsa_ctrl_str |
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};
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