X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Frsa%2Frsa_ameth.c;h=74ff65fcb6804acb556c58fc915135439ea14c9b;hp=e9ccd7e41d2fac6652598210a913a732e23eac99;hb=b35b8d116b545656abe14f0dff19aededd7df986;hpb=25aaa98aa249d26391c1994d2de449562c8b8b99 diff --git a/crypto/rsa/rsa_ameth.c b/crypto/rsa/rsa_ameth.c index e9ccd7e41d..74ff65fcb6 100644 --- a/crypto/rsa/rsa_ameth.c +++ b/crypto/rsa/rsa_ameth.c @@ -1,87 +1,90 @@ -/* crypto/rsa/rsa_ameth.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). + * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved. * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include -#include "cryptlib.h" +#include "internal/cryptlib.h" #include #include -#include #include -#ifndef OPENSSL_NO_CMS -# include -#endif +#include #include "internal/asn1_int.h" +#include "internal/evp_int.h" +#include "rsa_locl.h" +#ifndef OPENSSL_NO_CMS static int rsa_cms_sign(CMS_SignerInfo *si); static int rsa_cms_verify(CMS_SignerInfo *si); static int rsa_cms_decrypt(CMS_RecipientInfo *ri); static int rsa_cms_encrypt(CMS_RecipientInfo *ri); +#endif + +static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg); + +/* Set any parameters associated with pkey */ +static int rsa_param_encode(const EVP_PKEY *pkey, + ASN1_STRING **pstr, int *pstrtype) +{ + const RSA *rsa = pkey->pkey.rsa; + *pstr = NULL; + /* If RSA it's just NULL type */ + if (pkey->ameth->pkey_id == EVP_PKEY_RSA) { + *pstrtype = V_ASN1_NULL; + return 1; + } + /* If no PSS parameters we omit parameters entirely */ + if (rsa->pss == NULL) { + *pstrtype = V_ASN1_UNDEF; + return 1; + } + /* Encode PSS parameters */ + if (!ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr)) { + ASN1_STRING_free(*pstr); + *pstr = NULL; + return 0; + } + + *pstrtype = V_ASN1_SEQUENCE; + return 1; +} +/* Decode any parameters and set them in RSA structure */ +static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg) +{ + const ASN1_OBJECT *algoid; + const void *algp; + int algptype; + + X509_ALGOR_get0(&algoid, &algptype, &algp, alg); + if (OBJ_obj2nid(algoid) == EVP_PKEY_RSA) + return 1; + if (algptype == V_ASN1_UNDEF) + return 1; + if (algptype != V_ASN1_SEQUENCE) + return 0; + rsa->pss = rsa_pss_decode(alg); + if (rsa->pss == NULL) + return 0; + return 1; +} static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) { unsigned char *penc = NULL; int penclen; + ASN1_STRING *str; + int strtype; + if (!rsa_param_encode(pkey, &str, &strtype)) + return 0; penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc); if (penclen <= 0) return 0; - if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA), - V_ASN1_NULL, NULL, penc, penclen)) + if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), + strtype, str, penc, penclen)) return 1; OPENSSL_free(penc); @@ -92,14 +95,20 @@ static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) { const unsigned char *p; int pklen; + X509_ALGOR *alg; RSA *rsa = NULL; - if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey)) + + if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey)) return 0; - if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen))) { + if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) { RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB); return 0; } - EVP_PKEY_assign_RSA(pkey, rsa); + if (!rsa_param_decode(rsa, alg)) { + RSA_free(rsa); + return 0; + } + EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa); return 1; } @@ -115,11 +124,12 @@ static int old_rsa_priv_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen) { RSA *rsa; - if (!(rsa = d2i_RSAPrivateKey(NULL, pder, derlen))) { + + if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) { RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB); return 0; } - EVP_PKEY_assign_RSA(pkey, rsa); + EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa); return 1; } @@ -132,6 +142,10 @@ static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) { unsigned char *rk = NULL; int rklen; + ASN1_STRING *str; + int strtype; + if (!rsa_param_encode(pkey, &str, &strtype)) + return 0; rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk); if (rklen <= 0) { @@ -139,8 +153,8 @@ static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) return 0; } - if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0, - V_ASN1_NULL, NULL, rk, rklen)) { + if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, + strtype, str, rk, rklen)) { RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); return 0; } @@ -148,13 +162,26 @@ static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) return 1; } -static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) +static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) { const unsigned char *p; + RSA *rsa; int pklen; - if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8)) + const X509_ALGOR *alg; + + if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8)) + return 0; + rsa = d2i_RSAPrivateKey(NULL, &p, pklen); + if (rsa == NULL) { + RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB); return 0; - return old_rsa_priv_decode(pkey, &p, pklen); + } + if (!rsa_param_decode(rsa, alg)) { + RSA_free(rsa); + return 0; + } + EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa); + return 1; } static int int_rsa_size(const EVP_PKEY *pkey) @@ -177,136 +204,39 @@ static void int_rsa_free(EVP_PKEY *pkey) RSA_free(pkey->pkey.rsa); } -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_rsa_print(BIO *bp, const RSA *x, int off, int priv) -{ - char *str; - const char *s; - unsigned char *m = NULL; - int ret = 0, mod_len = 0; - size_t buf_len = 0; - - update_buflen(x->n, &buf_len); - update_buflen(x->e, &buf_len); - - if (priv) { - update_buflen(x->d, &buf_len); - update_buflen(x->p, &buf_len); - update_buflen(x->q, &buf_len); - update_buflen(x->dmp1, &buf_len); - update_buflen(x->dmq1, &buf_len); - update_buflen(x->iqmp, &buf_len); - } - - m = OPENSSL_malloc(buf_len + 10); - if (m == NULL) { - RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE); - goto err; - } - - if (x->n != NULL) - mod_len = BN_num_bits(x->n); - - if (!BIO_indent(bp, off, 128)) - goto err; - - if (priv && x->d) { - if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) - <= 0) - goto err; - str = "modulus:"; - s = "publicExponent:"; - } else { - if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) - <= 0) - goto err; - str = "Modulus:"; - s = "Exponent:"; - } - if (!ASN1_bn_print(bp, str, x->n, m, off)) - goto err; - if (!ASN1_bn_print(bp, s, x->e, m, off)) - goto err; - if (priv) { - if (!ASN1_bn_print(bp, "privateExponent:", x->d, m, off)) - goto err; - if (!ASN1_bn_print(bp, "prime1:", x->p, m, off)) - goto err; - if (!ASN1_bn_print(bp, "prime2:", x->q, m, off)) - goto err; - if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off)) - goto err; - if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off)) - goto err; - if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off)) - goto err; - } - ret = 1; - err: - OPENSSL_free(m); - return (ret); -} - -static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, - ASN1_PCTX *ctx) -{ - return do_rsa_print(bp, pkey->pkey.rsa, indent, 0); -} - -static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, - ASN1_PCTX *ctx) -{ - return do_rsa_print(bp, pkey->pkey.rsa, indent, 1); -} - -/* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */ static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg) { - if (alg == NULL) - return NULL; if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) return NULL; return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR), alg->parameter); } -static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg, - X509_ALGOR **pmaskHash) -{ - RSA_PSS_PARAMS *pss; - - *pmaskHash = NULL; - - pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS), - alg->parameter); - - if (!pss) - return NULL; - - *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); - - return pss; -} - -static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, - X509_ALGOR *maskHash, int indent) +static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss, + int indent) { int rv = 0; - if (!pss) { - if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0) + X509_ALGOR *maskHash = NULL; + if (!BIO_indent(bp, indent, 128)) + goto err; + if (pss_key) { + if (pss == NULL) { + if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0) + return 0; + return 1; + } else { + if (BIO_puts(bp, "PSS parameter restrictions:") <= 0) + return 0; + } + } else if (pss == NULL) { + if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0) return 0; return 1; } if (BIO_puts(bp, "\n") <= 0) goto err; + if (pss_key) + indent += 2; if (!BIO_indent(bp, indent, 128)) goto err; if (BIO_puts(bp, "Hash Algorithm: ") <= 0) @@ -331,7 +261,8 @@ static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, goto err; if (BIO_puts(bp, " with ") <= 0) goto err; - if (maskHash) { + maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); + if (maskHash != NULL) { if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) goto err; } else if (BIO_puts(bp, "INVALID") <= 0) @@ -342,7 +273,7 @@ static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, if (!BIO_indent(bp, indent, 128)) goto err; - if (BIO_puts(bp, "Salt Length: 0x") <= 0) + if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0) goto err; if (pss->saltLength) { if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) @@ -365,21 +296,105 @@ static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, rv = 1; err: + X509_ALGOR_free(maskHash); return rv; } +static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv) +{ + const RSA *x = pkey->pkey.rsa; + char *str; + const char *s; + int ret = 0, mod_len = 0; + + if (x->n != NULL) + mod_len = BN_num_bits(x->n); + + if (!BIO_indent(bp, off, 128)) + goto err; + + if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0) + goto err; + + if (priv && x->d) { + if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0) + goto err; + str = "modulus:"; + s = "publicExponent:"; + } else { + if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0) + goto err; + str = "Modulus:"; + s = "Exponent:"; + } + if (!ASN1_bn_print(bp, str, x->n, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, s, x->e, NULL, off)) + goto err; + if (priv) { + if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off)) + goto err; + if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off)) + goto err; + } + if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off)) + goto err; + ret = 1; + err: + return ret; +} + +static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, + ASN1_PCTX *ctx) +{ + return pkey_rsa_print(bp, pkey, indent, 0); +} + +static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, + ASN1_PCTX *ctx) +{ + return pkey_rsa_print(bp, pkey, indent, 1); +} + +static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg) +{ + RSA_PSS_PARAMS *pss; + + pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS), + alg->parameter); + + if (pss == NULL) + return NULL; + + if (pss->maskGenAlgorithm != NULL) { + pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm); + if (pss->maskHash == NULL) { + RSA_PSS_PARAMS_free(pss); + return NULL; + } + } + + return pss; +} + static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) { - if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) { + if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) { int rv; RSA_PSS_PARAMS *pss; - X509_ALGOR *maskHash; - pss = rsa_pss_decode(sigalg, &maskHash); - rv = rsa_pss_param_print(bp, pss, maskHash, indent); + pss = rsa_pss_decode(sigalg); + rv = rsa_pss_param_print(bp, 0, pss, indent); RSA_PSS_PARAMS_free(pss); - X509_ALGOR_free(maskHash); if (!rv) return 0; } else if (!sig && BIO_puts(bp, "\n") <= 0) @@ -400,6 +415,8 @@ static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) break; case ASN1_PKEY_CTRL_PKCS7_ENCRYPT: + if (pkey_is_pss(pkey)) + return -2; if (arg1 == 0) PKCS7_RECIP_INFO_get0_alg(arg2, &alg); break; @@ -412,6 +429,8 @@ static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) break; case ASN1_PKEY_CTRL_CMS_ENVELOPE: + if (pkey_is_pss(pkey)) + return -2; if (arg1 == 0) return rsa_cms_encrypt(arg2); else if (arg1 == 1) @@ -419,6 +438,8 @@ static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) break; case ASN1_PKEY_CTRL_CMS_RI_TYPE: + if (pkey_is_pss(pkey)) + return -2; *(int *)arg2 = CMS_RECIPINFO_TRANS; return 1; #endif @@ -442,10 +463,10 @@ static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) /* allocate and set algorithm ID from EVP_MD, default SHA1 */ static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md) { - if (EVP_MD_type(md) == NID_sha1) + if (md == NULL || EVP_MD_type(md) == NID_sha1) return 1; *palg = X509_ALGOR_new(); - if (!*palg) + if (*palg == NULL) return 0; X509_ALGOR_set_md(*palg, md); return 1; @@ -457,7 +478,7 @@ static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md) X509_ALGOR *algtmp = NULL; ASN1_STRING *stmp = NULL; *palg = NULL; - if (EVP_MD_type(mgf1md) == NID_sha1) + if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1) return 1; /* need to embed algorithm ID inside another */ if (!rsa_md_to_algor(&algtmp, mgf1md)) @@ -465,7 +486,7 @@ static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md) if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp)) goto err; *palg = X509_ALGOR_new(); - if (!*palg) + if (*palg == NULL) goto err; X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); stmp = NULL; @@ -489,47 +510,22 @@ static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg) return md; } -/* convert MGF1 algorithm ID to EVP_MD, default SHA1 */ -static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash) -{ - const EVP_MD *md; - if (!alg) - return EVP_sha1(); - /* Check mask and lookup mask hash algorithm */ - if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) { - RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM); - return NULL; - } - if (!maskHash) { - RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER); - return NULL; - } - md = EVP_get_digestbyobj(maskHash->algorithm); - if (md == NULL) { - RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST); - return NULL; - } - return md; -} - /* - * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter, + * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter, * suitable for setting an AlgorithmIdentifier. */ -static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) +static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) { const EVP_MD *sigmd, *mgf1md; - RSA_PSS_PARAMS *pss = NULL; - ASN1_STRING *os = NULL; EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); - int saltlen, rv = 0; + int saltlen; if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0) - goto err; + return NULL; if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) - goto err; + return NULL; if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) - goto err; + return NULL; if (saltlen == -1) saltlen = EVP_MD_size(sigmd); else if (saltlen == -2) { @@ -537,35 +533,53 @@ static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx) if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) saltlen--; } - pss = RSA_PSS_PARAMS_new(); - if (!pss) + + return rsa_pss_params_create(sigmd, mgf1md, saltlen); +} + +RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd, + const EVP_MD *mgf1md, int saltlen) +{ + RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new(); + if (pss == NULL) goto err; if (saltlen != 20) { pss->saltLength = ASN1_INTEGER_new(); - if (!pss->saltLength) + if (pss->saltLength == NULL) goto err; if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) goto err; } if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd)) goto err; + if (mgf1md == NULL) + mgf1md = sigmd; if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md)) goto err; - /* Finally create string with pss parameter encoding. */ - if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) - goto err; - rv = 1; + return pss; err: RSA_PSS_PARAMS_free(pss); - if (rv) - return os; - ASN1_STRING_free(os); return NULL; } +static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx) +{ + RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx); + ASN1_STRING *os = NULL; + if (pss == NULL) + return NULL; + + if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) { + ASN1_STRING_free(os); + os = NULL; + } + RSA_PSS_PARAMS_free(pss); + return os; +} + /* * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL - * then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are + * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are * passed to pkctx instead. */ @@ -576,51 +590,20 @@ static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx, int saltlen; const EVP_MD *mgf1md = NULL, *md = NULL; RSA_PSS_PARAMS *pss; - X509_ALGOR *maskHash; /* Sanity check: make sure it is PSS */ - if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { + if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) { RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); return -1; } /* Decode PSS parameters */ - pss = rsa_pss_decode(sigalg, &maskHash); + pss = rsa_pss_decode(sigalg); - if (pss == NULL) { + if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) { RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS); goto err; } - mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash); - if (!mgf1md) - goto err; - md = rsa_algor_to_md(pss->hashAlgorithm); - if (!md) - goto err; - - if (pss->saltLength) { - saltlen = ASN1_INTEGER_get(pss->saltLength); - - /* - * Could perform more salt length sanity checks but the main RSA - * routines will trap other invalid values anyway. - */ - if (saltlen < 0) { - RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH); - goto err; - } - } else - saltlen = 20; - - /* - * low-level routines support only trailer field 0xbc (value 1) and - * PKCS#1 says we should reject any other value anyway. - */ - if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { - RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER); - goto err; - } /* We have all parameters now set up context */ - if (pkey) { if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) goto err; @@ -647,10 +630,42 @@ static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx, err: RSA_PSS_PARAMS_free(pss); - X509_ALGOR_free(maskHash); return rv; } +int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd, + const EVP_MD **pmgf1md, int *psaltlen) +{ + if (pss == NULL) + return 0; + *pmd = rsa_algor_to_md(pss->hashAlgorithm); + if (*pmd == NULL) + return 0; + *pmgf1md = rsa_algor_to_md(pss->maskHash); + if (*pmgf1md == NULL) + return 0; + if (pss->saltLength) { + *psaltlen = ASN1_INTEGER_get(pss->saltLength); + if (*psaltlen < 0) { + RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH); + return 0; + } + } else + *psaltlen = 20; + + /* + * low-level routines support only trailer field 0xbc (value 1) and + * PKCS#1 says we should reject any other value anyway. + */ + if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { + RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER); + return 0; + } + + return 1; +} + +#ifndef OPENSSL_NO_CMS static int rsa_cms_verify(CMS_SignerInfo *si) { int nid, nid2; @@ -660,7 +675,7 @@ static int rsa_cms_verify(CMS_SignerInfo *si) nid = OBJ_obj2nid(alg->algorithm); if (nid == NID_rsaEncryption) return 1; - if (nid == NID_rsassaPss) + if (nid == EVP_PKEY_RSA_PSS) return rsa_pss_to_ctx(NULL, pkctx, alg, NULL); /* Workaround for some implementation that use a signature OID */ if (OBJ_find_sigid_algs(nid, NULL, &nid2)) { @@ -669,6 +684,7 @@ static int rsa_cms_verify(CMS_SignerInfo *si) } return 0; } +#endif /* * Customised RSA item verification routine. This is called when a signature @@ -680,7 +696,7 @@ static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, EVP_PKEY *pkey) { /* Sanity check: make sure it is PSS */ - if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { + if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) { RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); return -1; } @@ -691,6 +707,7 @@ static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, return -1; } +#ifndef OPENSSL_NO_CMS static int rsa_cms_sign(CMS_SignerInfo *si) { int pad_mode = RSA_PKCS1_PADDING; @@ -709,26 +726,27 @@ static int rsa_cms_sign(CMS_SignerInfo *si) /* We don't support it */ if (pad_mode != RSA_PKCS1_PSS_PADDING) return 0; - os = rsa_ctx_to_pss(pkctx); + os = rsa_ctx_to_pss_string(pkctx); if (!os) return 0; - X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os); + X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os); return 1; } +#endif static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, X509_ALGOR *alg1, X509_ALGOR *alg2, ASN1_BIT_STRING *sig) { int pad_mode; - EVP_PKEY_CTX *pkctx = ctx->pctx; + EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx); if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) return 0; if (pad_mode == RSA_PKCS1_PADDING) return 2; if (pad_mode == RSA_PKCS1_PSS_PADDING) { ASN1_STRING *os1 = NULL; - os1 = rsa_ctx_to_pss(pkctx); + os1 = rsa_ctx_to_pss_string(pkctx); if (!os1) return 0; /* Duplicate parameters if we have to */ @@ -738,32 +756,35 @@ static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, ASN1_STRING_free(os1); return 0; } - X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss), + X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os2); } - X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss), + X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os1); return 3; } return 2; } -static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg, - X509_ALGOR **pmaskHash) +#ifndef OPENSSL_NO_CMS +static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg) { - RSA_OAEP_PARAMS *pss; - - *pmaskHash = NULL; + RSA_OAEP_PARAMS *oaep; - pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS), + oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS), alg->parameter); - if (!pss) + if (oaep == NULL) return NULL; - *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc); - - return pss; + if (oaep->maskGenFunc != NULL) { + oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc); + if (oaep->maskHash == NULL) { + RSA_OAEP_PARAMS_free(oaep); + return NULL; + } + } + return oaep; } static int rsa_cms_decrypt(CMS_RecipientInfo *ri) @@ -776,7 +797,6 @@ static int rsa_cms_decrypt(CMS_RecipientInfo *ri) int labellen = 0; const EVP_MD *mgf1md = NULL, *md = NULL; RSA_OAEP_PARAMS *oaep; - X509_ALGOR *maskHash; pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri); if (!pkctx) return 0; @@ -790,14 +810,14 @@ static int rsa_cms_decrypt(CMS_RecipientInfo *ri) return -1; } /* Decode OAEP parameters */ - oaep = rsa_oaep_decode(cmsalg, &maskHash); + oaep = rsa_oaep_decode(cmsalg); if (oaep == NULL) { RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS); goto err; } - mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash); + mgf1md = rsa_algor_to_md(oaep->maskHash); if (!mgf1md) goto err; md = rsa_algor_to_md(oaep->hashFunc); @@ -834,7 +854,6 @@ static int rsa_cms_decrypt(CMS_RecipientInfo *ri) err: RSA_OAEP_PARAMS_free(oaep); - X509_ALGOR_free(maskHash); return rv; } @@ -867,18 +886,19 @@ static int rsa_cms_encrypt(CMS_RecipientInfo *ri) if (labellen < 0) goto err; oaep = RSA_OAEP_PARAMS_new(); - if (!oaep) + if (oaep == NULL) goto err; if (!rsa_md_to_algor(&oaep->hashFunc, md)) goto err; if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md)) goto err; if (labellen > 0) { - ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new(); + ASN1_OCTET_STRING *los; oaep->pSourceFunc = X509_ALGOR_new(); - if (!oaep->pSourceFunc) + if (oaep->pSourceFunc == NULL) goto err; - if (!los) + los = ASN1_OCTET_STRING_new(); + if (los == NULL) goto err; if (!ASN1_OCTET_STRING_set(los, label, labellen)) { ASN1_OCTET_STRING_free(los); @@ -898,8 +918,9 @@ static int rsa_cms_encrypt(CMS_RecipientInfo *ri) ASN1_STRING_free(os); return rv; } +#endif -const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = { +const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = { { EVP_PKEY_RSA, EVP_PKEY_RSA, @@ -936,3 +957,34 @@ const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = { EVP_PKEY_RSA, ASN1_PKEY_ALIAS} }; + +const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = { + EVP_PKEY_RSA_PSS, + EVP_PKEY_RSA_PSS, + ASN1_PKEY_SIGPARAM_NULL, + + "RSA-PSS", + "OpenSSL RSA-PSS method", + + rsa_pub_decode, + rsa_pub_encode, + rsa_pub_cmp, + rsa_pub_print, + + rsa_priv_decode, + rsa_priv_encode, + rsa_priv_print, + + int_rsa_size, + rsa_bits, + rsa_security_bits, + + 0, 0, 0, 0, 0, 0, + + rsa_sig_print, + int_rsa_free, + rsa_pkey_ctrl, + 0, 0, + rsa_item_verify, + rsa_item_sign, +};