-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 2006.
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2006.
*/
/* ====================================================================
* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
*/
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
-#include <openssl/rsa.h>
#include <openssl/evp.h>
-#include "evp_locl.h"
+#include <openssl/bn.h>
+#include "internal/evp_int.h"
+#include "dsa_locl.h"
/* DSA pkey context structure */
-typedef struct
- {
- /* Parameter gen parameters */
- int nbits;
- /* Keygen callback info */
- int gentmp[2];
- /* message digest */
- const EVP_MD *md;
- } DSA_PKEY_CTX;
+typedef struct {
+ /* Parameter gen parameters */
+ int nbits; /* size of p in bits (default: 1024) */
+ int qbits; /* size of q in bits (default: 160) */
+ const EVP_MD *pmd; /* MD for parameter generation */
+ /* Keygen callback info */
+ int gentmp[2];
+ /* message digest */
+ const EVP_MD *md; /* MD for the signature */
+} DSA_PKEY_CTX;
static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
- {
- DSA_PKEY_CTX *dctx;
- dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX));
- if (!dctx)
- return 0;
- dctx->nbits = 1024;
- dctx->md = NULL;
-
- ctx->data = dctx;
- ctx->keygen_info = dctx->gentmp;
- ctx->keygen_info_count = 2;
-
- return 1;
- }
+{
+ DSA_PKEY_CTX *dctx;
+ dctx = OPENSSL_malloc(sizeof(*dctx));
+ if (!dctx)
+ return 0;
+ dctx->nbits = 1024;
+ dctx->qbits = 160;
+ dctx->pmd = NULL;
+ dctx->md = NULL;
+
+ ctx->data = dctx;
+ ctx->keygen_info = dctx->gentmp;
+ ctx->keygen_info_count = 2;
+
+ return 1;
+}
+
+static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+{
+ DSA_PKEY_CTX *dctx, *sctx;
+ if (!pkey_dsa_init(dst))
+ return 0;
+ sctx = src->data;
+ dctx = dst->data;
+ dctx->nbits = sctx->nbits;
+ dctx->qbits = sctx->qbits;
+ dctx->pmd = sctx->pmd;
+ dctx->md = sctx->md;
+ return 1;
+}
static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx)
- {
- DSA_PKEY_CTX *dctx = ctx->data;
- if (dctx)
- OPENSSL_free(dctx);
- }
-
-static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, int *siglen,
- const unsigned char *tbs, int tbslen)
- {
- int ret, type;
- unsigned int sltmp;
- DSA_PKEY_CTX *dctx = ctx->data;
- DSA *dsa = ctx->pkey->pkey.dsa;
-
- if (dctx->md)
- type = EVP_MD_type(dctx->md);
- else
- type = NID_sha1;
-
- ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
-
- if (ret < 0)
- return ret;
- *siglen = sltmp;
- return 1;
- }
+{
+ DSA_PKEY_CTX *dctx = ctx->data;
+ OPENSSL_free(dctx);
+}
+
+static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig,
+ size_t *siglen, const unsigned char *tbs,
+ size_t tbslen)
+{
+ int ret, type;
+ unsigned int sltmp;
+ DSA_PKEY_CTX *dctx = ctx->data;
+ DSA *dsa = ctx->pkey->pkey.dsa;
+
+ if (dctx->md) {
+ if (tbslen != (size_t)EVP_MD_size(dctx->md))
+ return 0;
+ type = EVP_MD_type(dctx->md);
+ } else {
+ if (tbslen != SHA_DIGEST_LENGTH)
+ return 0;
+ type = NID_sha1;
+ }
+
+ ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
+
+ if (ret <= 0)
+ return ret;
+ *siglen = sltmp;
+ return 1;
+}
static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
- const unsigned char *sig, int siglen,
- const unsigned char *tbs, int tbslen)
- {
- int ret, type;
- DSA_PKEY_CTX *dctx = ctx->data;
- DSA *dsa = ctx->pkey->pkey.dsa;
-
- if (dctx->md)
- type = EVP_MD_type(dctx->md);
- else
- type = NID_sha1;
-
- ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
-
- return ret;
- }
+ const unsigned char *sig, size_t siglen,
+ const unsigned char *tbs, size_t tbslen)
+{
+ int ret, type;
+ DSA_PKEY_CTX *dctx = ctx->data;
+ DSA *dsa = ctx->pkey->pkey.dsa;
+
+ if (dctx->md) {
+ if (tbslen != (size_t)EVP_MD_size(dctx->md))
+ return 0;
+ type = EVP_MD_type(dctx->md);
+ } else {
+ if (tbslen != SHA_DIGEST_LENGTH)
+ return 0;
+ type = NID_sha1;
+ }
+
+ ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
+
+ return ret;
+}
static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
- {
- DSA_PKEY_CTX *dctx = ctx->data;
- switch (type)
- {
- case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
- if (p1 < 256)
- return -2;
- dctx->nbits = p1;
- return 1;
-
- case EVP_PKEY_CTRL_MD:
- if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1)
- {
- DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
- return 0;
- }
- dctx->md = p2;
- return 1;
-
- default:
- return -2;
-
- }
- }
-
+{
+ DSA_PKEY_CTX *dctx = ctx->data;
+ switch (type) {
+ case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
+ if (p1 < 256)
+ return -2;
+ dctx->nbits = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
+ if (p1 != 160 && p1 != 224 && p1 && p1 != 256)
+ return -2;
+ dctx->qbits = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
+ if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha256) {
+ DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
+ return 0;
+ }
+ dctx->md = p2;
+ return 1;
+
+ case EVP_PKEY_CTRL_MD:
+ if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_dsa &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_dsaWithSHA &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha256 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha384 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha512) {
+ DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
+ return 0;
+ }
+ dctx->md = p2;
+ return 1;
+
+ case EVP_PKEY_CTRL_GET_MD:
+ *(const EVP_MD **)p2 = dctx->md;
+ return 1;
+
+ case EVP_PKEY_CTRL_DIGESTINIT:
+ case EVP_PKEY_CTRL_PKCS7_SIGN:
+ case EVP_PKEY_CTRL_CMS_SIGN:
+ return 1;
+
+ case EVP_PKEY_CTRL_PEER_KEY:
+ DSAerr(DSA_F_PKEY_DSA_CTRL,
+ EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
+ return -2;
+ default:
+ return -2;
+
+ }
+}
+
static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
- const char *type, const char *value)
- {
- if (!strcmp(type, "dsa_paramgen_bits"))
- {
- int nbits;
- nbits = atoi(value);
- return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
- }
- return -2;
- }
+ const char *type, const char *value)
+{
+ if (strcmp(type, "dsa_paramgen_bits") == 0) {
+ int nbits;
+ nbits = atoi(value);
+ return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
+ }
+ if (strcmp(type, "dsa_paramgen_q_bits") == 0) {
+ int qbits = atoi(value);
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits,
+ NULL);
+ }
+ if (strcmp(type, "dsa_paramgen_md") == 0) {
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
+ (void *)EVP_get_digestbyname(value));
+ }
+ return -2;
+}
static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
- {
- DSA *dsa = NULL;
- DSA_PKEY_CTX *dctx = ctx->data;
- BN_GENCB *pcb, cb;
- int ret;
- if (ctx->pkey_gencb)
- {
- pcb = &cb;
- evp_pkey_set_cb_translate(pcb, ctx);
- }
- else
- pcb = NULL;
- dsa = DSA_new();
- if (!dsa)
- return 0;
- ret = DSA_generate_parameters_ex(dsa, dctx->nbits, NULL, 0, NULL, NULL,
- pcb);
- if (ret)
- EVP_PKEY_assign_DSA(pkey, dsa);
- else
- DSA_free(dsa);
- return ret;
- }
+{
+ DSA *dsa = NULL;
+ DSA_PKEY_CTX *dctx = ctx->data;
+ BN_GENCB *pcb;
+ int ret;
+ if (ctx->pkey_gencb) {
+ pcb = BN_GENCB_new();
+ if (!pcb)
+ return 0;
+ evp_pkey_set_cb_translate(pcb, ctx);
+ } else
+ pcb = NULL;
+ dsa = DSA_new();
+ if (!dsa) {
+ BN_GENCB_free(pcb);
+ return 0;
+ }
+ ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd,
+ NULL, 0, NULL, NULL, NULL, pcb);
+ BN_GENCB_free(pcb);
+ if (ret)
+ EVP_PKEY_assign_DSA(pkey, dsa);
+ else
+ DSA_free(dsa);
+ return ret;
+}
static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
- {
- DSA *dsa = NULL;
- if (ctx->pkey == NULL)
- {
- DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
- return 0;
- }
- dsa = DSA_new();
- if (!dsa)
- return 0;
- EVP_PKEY_assign_DSA(pkey, dsa);
- /* Note: if error return, pkey is freed by parent routine */
- if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
- return 0;
- return DSA_generate_key(pkey->pkey.dsa);
- }
-
-const EVP_PKEY_METHOD dsa_pkey_meth =
- {
- EVP_PKEY_DSA,
- 0,
- pkey_dsa_init,
- pkey_dsa_cleanup,
-
- 0,
- pkey_dsa_paramgen,
-
- 0,
- pkey_dsa_keygen,
-
- 0,
- pkey_dsa_sign,
-
- 0,
- pkey_dsa_verify,
-
- 0,0,
-
- 0,0,0,0,
-
- 0,0,
-
- 0,0,
-
- 0,0,
-
- pkey_dsa_ctrl,
- pkey_dsa_ctrl_str
-
-
- };
+{
+ DSA *dsa = NULL;
+ if (ctx->pkey == NULL) {
+ DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
+ return 0;
+ }
+ dsa = DSA_new();
+ if (!dsa)
+ return 0;
+ EVP_PKEY_assign_DSA(pkey, dsa);
+ /* Note: if error return, pkey is freed by parent routine */
+ if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
+ return 0;
+ return DSA_generate_key(pkey->pkey.dsa);
+}
+
+const EVP_PKEY_METHOD dsa_pkey_meth = {
+ EVP_PKEY_DSA,
+ EVP_PKEY_FLAG_AUTOARGLEN,
+ pkey_dsa_init,
+ pkey_dsa_copy,
+ pkey_dsa_cleanup,
+
+ 0,
+ pkey_dsa_paramgen,
+
+ 0,
+ pkey_dsa_keygen,
+
+ 0,
+ pkey_dsa_sign,
+
+ 0,
+ pkey_dsa_verify,
+
+ 0, 0,
+
+ 0, 0, 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ pkey_dsa_ctrl,
+ pkey_dsa_ctrl_str
+};
projects / openssl.git / blobdiff