diff options
Diffstat (limited to 'openssl/crypto/rsa/rsa_pmeth.c')
| -rw-r--r-- | openssl/crypto/rsa/rsa_pmeth.c | 585 |
1 files changed, 585 insertions, 0 deletions
diff --git a/openssl/crypto/rsa/rsa_pmeth.c b/openssl/crypto/rsa/rsa_pmeth.c new file mode 100644 index 000000000..297e17cdc --- /dev/null +++ b/openssl/crypto/rsa/rsa_pmeth.c @@ -0,0 +1,585 @@ +/* crypto/rsa/rsa_pmeth.c */ +/* 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/asn1t.h> +#include <openssl/x509.h> +#include <openssl/rsa.h> +#include <openssl/bn.h> +#include <openssl/evp.h> +#include "evp_locl.h" +#include "rsa_locl.h" + +/* RSA pkey context structure */ + +typedef struct + { + /* Key gen parameters */ + int nbits; + BIGNUM *pub_exp; + /* Keygen callback info */ + int gentmp[2]; + /* RSA padding mode */ + int pad_mode; + /* message digest */ + const EVP_MD *md; + /* PSS/OAEP salt length */ + int saltlen; + /* Temp buffer */ + unsigned char *tbuf; + } RSA_PKEY_CTX; + +static int pkey_rsa_init(EVP_PKEY_CTX *ctx) + { + RSA_PKEY_CTX *rctx; + rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX)); + if (!rctx) + return 0; + rctx->nbits = 1024; + rctx->pub_exp = NULL; + rctx->pad_mode = RSA_PKCS1_PADDING; + rctx->md = NULL; + rctx->tbuf = NULL; + + rctx->saltlen = -2; + + ctx->data = rctx; + ctx->keygen_info = rctx->gentmp; + ctx->keygen_info_count = 2; + + return 1; + } + +static int pkey_rsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) + { + RSA_PKEY_CTX *dctx, *sctx; + if (!pkey_rsa_init(dst)) + return 0; + sctx = src->data; + dctx = dst->data; + dctx->nbits = sctx->nbits; + if (sctx->pub_exp) + { + dctx->pub_exp = BN_dup(sctx->pub_exp); + if (!dctx->pub_exp) + return 0; + } + dctx->pad_mode = sctx->pad_mode; + dctx->md = sctx->md; + return 1; + } + +static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk) + { + if (ctx->tbuf) + return 1; + ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey)); + if (!ctx->tbuf) + return 0; + return 1; + } + +static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx) + { + RSA_PKEY_CTX *rctx = ctx->data; + if (rctx) + { + if (rctx->pub_exp) + BN_free(rctx->pub_exp); + if (rctx->tbuf) + OPENSSL_free(rctx->tbuf); + OPENSSL_free(rctx); + } + } + +static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, + const unsigned char *tbs, size_t tbslen) + { + int ret; + RSA_PKEY_CTX *rctx = ctx->data; + RSA *rsa = ctx->pkey->pkey.rsa; + + if (rctx->md) + { + if (tbslen != (size_t)EVP_MD_size(rctx->md)) + { + RSAerr(RSA_F_PKEY_RSA_SIGN, + RSA_R_INVALID_DIGEST_LENGTH); + return -1; + } + if (rctx->pad_mode == RSA_X931_PADDING) + { + if (!setup_tbuf(rctx, ctx)) + return -1; + memcpy(rctx->tbuf, tbs, tbslen); + rctx->tbuf[tbslen] = + RSA_X931_hash_id(EVP_MD_type(rctx->md)); + ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf, + sig, rsa, RSA_X931_PADDING); + } + else if (rctx->pad_mode == RSA_PKCS1_PADDING) + { + unsigned int sltmp; + ret = RSA_sign(EVP_MD_type(rctx->md), + tbs, tbslen, sig, &sltmp, rsa); + if (ret <= 0) + return ret; + ret = sltmp; + } + else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) + { + if (!setup_tbuf(rctx, ctx)) + return -1; + if (!RSA_padding_add_PKCS1_PSS(rsa, rctx->tbuf, tbs, + rctx->md, rctx->saltlen)) + return -1; + ret = RSA_private_encrypt(RSA_size(rsa), rctx->tbuf, + sig, rsa, RSA_NO_PADDING); + } + else + return -1; + } + else + ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa, + rctx->pad_mode); + if (ret < 0) + return ret; + *siglen = ret; + return 1; + } + + +static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx, + unsigned char *rout, size_t *routlen, + const unsigned char *sig, size_t siglen) + { + int ret; + RSA_PKEY_CTX *rctx = ctx->data; + + if (rctx->md) + { + if (rctx->pad_mode == RSA_X931_PADDING) + { + if (!setup_tbuf(rctx, ctx)) + return -1; + ret = RSA_public_decrypt(siglen, sig, + rctx->tbuf, ctx->pkey->pkey.rsa, + RSA_X931_PADDING); + if (ret < 1) + return 0; + ret--; + if (rctx->tbuf[ret] != + RSA_X931_hash_id(EVP_MD_type(rctx->md))) + { + RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER, + RSA_R_ALGORITHM_MISMATCH); + return 0; + } + if (ret != EVP_MD_size(rctx->md)) + { + RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER, + RSA_R_INVALID_DIGEST_LENGTH); + return 0; + } + if (rout) + memcpy(rout, rctx->tbuf, ret); + } + else if (rctx->pad_mode == RSA_PKCS1_PADDING) + { + size_t sltmp; + ret = int_rsa_verify(EVP_MD_type(rctx->md), + NULL, 0, rout, &sltmp, + sig, siglen, ctx->pkey->pkey.rsa); + ret = sltmp; + } + else + return -1; + } + else + ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa, + rctx->pad_mode); + if (ret < 0) + return ret; + *routlen = ret; + return 1; + } + +static int pkey_rsa_verify(EVP_PKEY_CTX *ctx, + const unsigned char *sig, size_t siglen, + const unsigned char *tbs, size_t tbslen) + { + RSA_PKEY_CTX *rctx = ctx->data; + RSA *rsa = ctx->pkey->pkey.rsa; + size_t rslen; + if (rctx->md) + { + if (rctx->pad_mode == RSA_PKCS1_PADDING) + return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen, + sig, siglen, rsa); + if (rctx->pad_mode == RSA_X931_PADDING) + { + if (pkey_rsa_verifyrecover(ctx, NULL, &rslen, + sig, siglen) <= 0) + return 0; + } + else if (rctx->pad_mode == RSA_PKCS1_PSS_PADDING) + { + int ret; + if (!setup_tbuf(rctx, ctx)) + return -1; + ret = RSA_public_decrypt(siglen, sig, rctx->tbuf, + rsa, RSA_NO_PADDING); + if (ret <= 0) + return 0; + ret = RSA_verify_PKCS1_PSS(rsa, tbs, rctx->md, + rctx->tbuf, rctx->saltlen); + if (ret <= 0) + return 0; + return 1; + } + else + return -1; + } + else + { + if (!setup_tbuf(rctx, ctx)) + return -1; + rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf, + rsa, rctx->pad_mode); + if (rslen == 0) + return 0; + } + + if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen)) + return 0; + + return 1; + + } + + +static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx, + unsigned char *out, size_t *outlen, + const unsigned char *in, size_t inlen) + { + int ret; + RSA_PKEY_CTX *rctx = ctx->data; + ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa, + rctx->pad_mode); + if (ret < 0) + return ret; + *outlen = ret; + return 1; + } + +static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx, + unsigned char *out, size_t *outlen, + const unsigned char *in, size_t inlen) + { + int ret; + RSA_PKEY_CTX *rctx = ctx->data; + ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa, + rctx->pad_mode); + if (ret < 0) + return ret; + *outlen = ret; + return 1; + } + +static int check_padding_md(const EVP_MD *md, int padding) + { + if (!md) + return 1; + + if (padding == RSA_NO_PADDING) + { + RSAerr(RSA_F_CHECK_PADDING_MD, RSA_R_INVALID_PADDING_MODE); + return 0; + } + + if (padding == RSA_X931_PADDING) + { + if (RSA_X931_hash_id(EVP_MD_type(md)) == -1) + { + RSAerr(RSA_F_CHECK_PADDING_MD, + RSA_R_INVALID_X931_DIGEST); + return 0; + } + return 1; + } + + return 1; + } + + +static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) + { + RSA_PKEY_CTX *rctx = ctx->data; + switch (type) + { + case EVP_PKEY_CTRL_RSA_PADDING: + if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_PKCS1_PSS_PADDING)) + { + if (!check_padding_md(rctx->md, p1)) + return 0; + if (p1 == RSA_PKCS1_PSS_PADDING) + { + if (!(ctx->operation & + (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY))) + goto bad_pad; + if (!rctx->md) + rctx->md = EVP_sha1(); + } + if (p1 == RSA_PKCS1_OAEP_PADDING) + { + if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT)) + goto bad_pad; + if (!rctx->md) + rctx->md = EVP_sha1(); + } + rctx->pad_mode = p1; + return 1; + } + bad_pad: + RSAerr(RSA_F_PKEY_RSA_CTRL, + RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE); + return -2; + + case EVP_PKEY_CTRL_RSA_PSS_SALTLEN: + if (p1 < -2) + return -2; + if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING) + { + RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_PSS_SALTLEN); + return -2; + } + rctx->saltlen = p1; + return 1; + + case EVP_PKEY_CTRL_RSA_KEYGEN_BITS: + if (p1 < 256) + { + RSAerr(RSA_F_PKEY_RSA_CTRL, RSA_R_INVALID_KEYBITS); + return -2; + } + rctx->nbits = p1; + return 1; + + case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP: + if (!p2) + return -2; + rctx->pub_exp = p2; + return 1; + + case EVP_PKEY_CTRL_MD: + if (!check_padding_md(p2, rctx->pad_mode)) + return 0; + rctx->md = p2; + return 1; + + case EVP_PKEY_CTRL_DIGESTINIT: + case EVP_PKEY_CTRL_PKCS7_ENCRYPT: + case EVP_PKEY_CTRL_PKCS7_DECRYPT: + case EVP_PKEY_CTRL_PKCS7_SIGN: +#ifndef OPENSSL_NO_CMS + case EVP_PKEY_CTRL_CMS_ENCRYPT: + case EVP_PKEY_CTRL_CMS_DECRYPT: + case EVP_PKEY_CTRL_CMS_SIGN: +#endif + return 1; + case EVP_PKEY_CTRL_PEER_KEY: + RSAerr(RSA_F_PKEY_RSA_CTRL, + RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return -2; + + default: + return -2; + + } + } + +static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx, + const char *type, const char *value) + { + if (!value) + { + RSAerr(RSA_F_PKEY_RSA_CTRL_STR, RSA_R_VALUE_MISSING); + return 0; + } + if (!strcmp(type, "rsa_padding_mode")) + { + int pm; + if (!strcmp(value, "pkcs1")) + pm = RSA_PKCS1_PADDING; + else if (!strcmp(value, "sslv23")) + pm = RSA_SSLV23_PADDING; + else if (!strcmp(value, "none")) + pm = RSA_NO_PADDING; + else if (!strcmp(value, "oeap")) + pm = RSA_PKCS1_OAEP_PADDING; + else if (!strcmp(value, "x931")) + pm = RSA_X931_PADDING; + else if (!strcmp(value, "pss")) + pm = RSA_PKCS1_PSS_PADDING; + else + { + RSAerr(RSA_F_PKEY_RSA_CTRL_STR, + RSA_R_UNKNOWN_PADDING_TYPE); + return -2; + } + return EVP_PKEY_CTX_set_rsa_padding(ctx, pm); + } + + if (!strcmp(type, "rsa_pss_saltlen")) + { + int saltlen; + saltlen = atoi(value); + return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, saltlen); + } + + if (!strcmp(type, "rsa_keygen_bits")) + { + int nbits; + nbits = atoi(value); + return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, nbits); + } + + if (!strcmp(type, "rsa_keygen_pubexp")) + { + int ret; + BIGNUM *pubexp = NULL; + if (!BN_asc2bn(&pubexp, value)) + return 0; + ret = EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp); + if (ret <= 0) + BN_free(pubexp); + return ret; + } + + return -2; + } + +static int pkey_rsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) + { + RSA *rsa = NULL; + RSA_PKEY_CTX *rctx = ctx->data; + BN_GENCB *pcb, cb; + int ret; + if (!rctx->pub_exp) + { + rctx->pub_exp = BN_new(); + if (!rctx->pub_exp || !BN_set_word(rctx->pub_exp, RSA_F4)) + return 0; + } + rsa = RSA_new(); + if (!rsa) + return 0; + if (ctx->pkey_gencb) + { + pcb = &cb; + evp_pkey_set_cb_translate(pcb, ctx); + } + else + pcb = NULL; + ret = RSA_generate_key_ex(rsa, rctx->nbits, rctx->pub_exp, pcb); + if (ret > 0) + EVP_PKEY_assign_RSA(pkey, rsa); + else + RSA_free(rsa); + return ret; + } + +const EVP_PKEY_METHOD rsa_pkey_meth = + { + EVP_PKEY_RSA, + EVP_PKEY_FLAG_AUTOARGLEN, + pkey_rsa_init, + pkey_rsa_copy, + pkey_rsa_cleanup, + + 0,0, + + 0, + pkey_rsa_keygen, + + 0, + pkey_rsa_sign, + + 0, + pkey_rsa_verify, + + 0, + pkey_rsa_verifyrecover, + + + 0,0,0,0, + + 0, + pkey_rsa_encrypt, + + 0, + pkey_rsa_decrypt, + + 0,0, + + pkey_rsa_ctrl, + pkey_rsa_ctrl_str + + + }; 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