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-rw-r--r--src/crypto/evp/p_rsa_asn1.c705
1 files changed, 705 insertions, 0 deletions
diff --git a/src/crypto/evp/p_rsa_asn1.c b/src/crypto/evp/p_rsa_asn1.c
new file mode 100644
index 0000000..f478d50
--- /dev/null
+++ b/src/crypto/evp/p_rsa_asn1.c
@@ -0,0 +1,705 @@
+/* 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 <openssl/evp.h>
+
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/digest.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+#include <openssl/obj.h>
+#include <openssl/rsa.h>
+#include <openssl/x509.h>
+
+#include "../rsa/internal.h"
+#include "internal.h"
+
+
+static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) {
+ uint8_t *encoded = NULL;
+ int len;
+ len = i2d_RSAPublicKey(pkey->pkey.rsa, &encoded);
+
+ if (len <= 0) {
+ return 0;
+ }
+
+ if (!X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA), V_ASN1_NULL, NULL,
+ encoded, len)) {
+ OPENSSL_free(encoded);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) {
+ const uint8_t *p;
+ int pklen;
+ RSA *rsa;
+
+ if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey)) {
+ return 0;
+ }
+ rsa = d2i_RSAPublicKey(NULL, &p, pklen);
+ if (rsa == NULL) {
+ OPENSSL_PUT_ERROR(EVP, rsa_pub_decode, ERR_R_RSA_LIB);
+ return 0;
+ }
+ EVP_PKEY_assign_RSA(pkey, rsa);
+ return 1;
+}
+
+static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
+ return BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) == 0 &&
+ BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) == 0;
+}
+
+static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) {
+ uint8_t *rk = NULL;
+ int rklen;
+
+ rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
+
+ if (rklen <= 0) {
+ OPENSSL_PUT_ERROR(EVP, rsa_priv_encode, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ /* TODO(fork): const correctness in next line. */
+ if (!PKCS8_pkey_set0(p8, (ASN1_OBJECT *)OBJ_nid2obj(NID_rsaEncryption), 0,
+ V_ASN1_NULL, NULL, rk, rklen)) {
+ OPENSSL_PUT_ERROR(EVP, rsa_priv_encode, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ return 1;
+}
+
+static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) {
+ const uint8_t *p;
+ int pklen;
+ RSA *rsa;
+
+ if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8)) {
+ OPENSSL_PUT_ERROR(EVP, rsa_priv_decode, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
+ if (rsa == NULL) {
+ OPENSSL_PUT_ERROR(EVP, rsa_priv_decode, ERR_R_RSA_LIB);
+ return 0;
+ }
+
+ EVP_PKEY_assign_RSA(pkey, rsa);
+ return 1;
+}
+
+static int rsa_opaque(const EVP_PKEY *pkey) {
+ return RSA_is_opaque(pkey->pkey.rsa);
+}
+
+static int rsa_supports_digest(const EVP_PKEY *pkey, const EVP_MD *md) {
+ return RSA_supports_digest(pkey->pkey.rsa, md);
+}
+
+static int int_rsa_size(const EVP_PKEY *pkey) {
+ return RSA_size(pkey->pkey.rsa);
+}
+
+static int rsa_bits(const EVP_PKEY *pkey) {
+ return BN_num_bits(pkey->pkey.rsa->n);
+}
+
+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;
+ }
+
+ i = BN_num_bytes(b);
+ if (*pbuflen < i) {
+ *pbuflen = i;
+ }
+}
+
+static int do_rsa_print(BIO *out, const RSA *rsa, int off,
+ int include_private) {
+ char *str;
+ const char *s;
+ uint8_t *m = NULL;
+ int ret = 0, mod_len = 0;
+ size_t buf_len = 0;
+
+ update_buflen(rsa->n, &buf_len);
+ update_buflen(rsa->e, &buf_len);
+
+ if (include_private) {
+ update_buflen(rsa->d, &buf_len);
+ update_buflen(rsa->p, &buf_len);
+ update_buflen(rsa->q, &buf_len);
+ update_buflen(rsa->dmp1, &buf_len);
+ update_buflen(rsa->dmq1, &buf_len);
+ update_buflen(rsa->iqmp, &buf_len);
+ }
+
+ m = (uint8_t *)OPENSSL_malloc(buf_len + 10);
+ if (m == NULL) {
+ OPENSSL_PUT_ERROR(EVP, do_rsa_print, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (rsa->n != NULL) {
+ mod_len = BN_num_bits(rsa->n);
+ }
+
+ if (!BIO_indent(out, off, 128)) {
+ goto err;
+ }
+
+ if (include_private && rsa->d) {
+ if (BIO_printf(out, "Private-Key: (%d bit)\n", mod_len) <= 0) {
+ goto err;
+ }
+ str = "modulus:";
+ s = "publicExponent:";
+ } else {
+ if (BIO_printf(out, "Public-Key: (%d bit)\n", mod_len) <= 0) {
+ goto err;
+ }
+ str = "Modulus:";
+ s = "Exponent:";
+ }
+ if (!ASN1_bn_print(out, str, rsa->n, m, off) ||
+ !ASN1_bn_print(out, s, rsa->e, m, off)) {
+ goto err;
+ }
+
+ if (include_private) {
+ if (!ASN1_bn_print(out, "privateExponent:", rsa->d, m, off) ||
+ !ASN1_bn_print(out, "prime1:", rsa->p, m, off) ||
+ !ASN1_bn_print(out, "prime2:", rsa->q, m, off) ||
+ !ASN1_bn_print(out, "exponent1:", rsa->dmp1, m, off) ||
+ !ASN1_bn_print(out, "exponent2:", rsa->dmq1, m, off) ||
+ !ASN1_bn_print(out, "coefficient:", rsa->iqmp, m, off)) {
+ goto err;
+ }
+ }
+ ret = 1;
+
+err:
+ if (m != NULL) {
+ 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) {
+ const uint8_t *p;
+ int plen;
+
+ if (alg == NULL ||
+ OBJ_obj2nid(alg->algorithm) != NID_mgf1 ||
+ alg->parameter->type != V_ASN1_SEQUENCE) {
+ return NULL;
+ }
+
+ p = alg->parameter->value.sequence->data;
+ plen = alg->parameter->value.sequence->length;
+ return d2i_X509_ALGOR(NULL, &p, plen);
+}
+
+static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
+ X509_ALGOR **pmaskHash) {
+ const uint8_t *p;
+ int plen;
+ RSA_PSS_PARAMS *pss;
+
+ *pmaskHash = NULL;
+
+ if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE) {
+ return NULL;
+ }
+ p = alg->parameter->value.sequence->data;
+ plen = alg->parameter->value.sequence->length;
+ pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
+
+ 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) {
+ int rv = 0;
+
+ if (!pss) {
+ if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0) {
+ return 0;
+ }
+ return 1;
+ }
+
+ if (BIO_puts(bp, "\n") <= 0 ||
+ !BIO_indent(bp, indent, 128) ||
+ BIO_puts(bp, "Hash Algorithm: ") <= 0) {
+ goto err;
+ }
+
+ if (pss->hashAlgorithm) {
+ if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0) {
+ goto err;
+ }
+ } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
+ goto err;
+ }
+
+ if (BIO_puts(bp, "\n") <= 0 ||
+ !BIO_indent(bp, indent, 128) ||
+ BIO_puts(bp, "Mask Algorithm: ") <= 0) {
+ goto err;
+ }
+
+ if (pss->maskGenAlgorithm) {
+ if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0 ||
+ BIO_puts(bp, " with ") <= 0) {
+ goto err;
+ }
+
+ if (maskHash) {
+ if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) {
+ goto err;
+ }
+ } else if (BIO_puts(bp, "INVALID") <= 0) {
+ goto err;
+ }
+ } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
+ goto err;
+ }
+ BIO_puts(bp, "\n");
+
+ if (!BIO_indent(bp, indent, 128) ||
+ BIO_puts(bp, "Salt Length: 0x") <= 0) {
+ goto err;
+ }
+
+ if (pss->saltLength) {
+ if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) {
+ goto err;
+ }
+ } else if (BIO_puts(bp, "14 (default)") <= 0) {
+ goto err;
+ }
+ BIO_puts(bp, "\n");
+
+ if (!BIO_indent(bp, indent, 128) ||
+ BIO_puts(bp, "Trailer Field: 0x") <= 0) {
+ goto err;
+ }
+
+ if (pss->trailerField) {
+ if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0) {
+ goto err;
+ }
+ } else if (BIO_puts(bp, "BC (default)") <= 0) {
+ goto err;
+ }
+ BIO_puts(bp, "\n");
+
+ rv = 1;
+
+err:
+ return rv;
+}
+
+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) {
+ int rv;
+ RSA_PSS_PARAMS *pss;
+ X509_ALGOR *maskHash;
+
+ pss = rsa_pss_decode(sigalg, &maskHash);
+ rv = rsa_pss_param_print(bp, pss, maskHash, indent);
+ if (pss) {
+ RSA_PSS_PARAMS_free(pss);
+ }
+ if (maskHash) {
+ X509_ALGOR_free(maskHash);
+ }
+ if (!rv) {
+ return 0;
+ }
+ } else if (!sig && BIO_puts(bp, "\n") <= 0) {
+ return 0;
+ }
+
+ if (sig) {
+ return X509_signature_dump(bp, sig, indent);
+ }
+ return 1;
+}
+
+static int old_rsa_priv_decode(EVP_PKEY *pkey, const unsigned char **pder,
+ int derlen) {
+ RSA *rsa = d2i_RSAPrivateKey(NULL, pder, derlen);
+ if (rsa == NULL) {
+ OPENSSL_PUT_ERROR(EVP, old_rsa_priv_decode, ERR_R_RSA_LIB);
+ return 0;
+ }
+ EVP_PKEY_assign_RSA(pkey, rsa);
+ return 1;
+}
+
+static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) {
+ return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
+}
+
+/* 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) {
+ return 1;
+ }
+ *palg = X509_ALGOR_new();
+ if (!*palg) {
+ return 0;
+ }
+ X509_ALGOR_set_md(*palg, md);
+ return 1;
+}
+
+/* Allocate and set MGF1 algorithm ID from EVP_MD */
+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) {
+ return 1;
+ }
+ /* need to embed algorithm ID inside another */
+ if (!rsa_md_to_algor(&algtmp, mgf1md) ||
+ !ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp)) {
+ goto err;
+ }
+ *palg = X509_ALGOR_new();
+ if (!*palg) {
+ goto err;
+ }
+ X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
+ stmp = NULL;
+
+err:
+ if (stmp)
+ ASN1_STRING_free(stmp);
+ if (algtmp)
+ X509_ALGOR_free(algtmp);
+ if (*palg)
+ return 1;
+
+ return 0;
+}
+
+/* convert algorithm ID to EVP_MD, default SHA1 */
+static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg) {
+ const EVP_MD *md;
+ if (!alg) {
+ return EVP_sha1();
+ }
+ md = EVP_get_digestbyobj(alg->algorithm);
+ if (md == NULL) {
+ OPENSSL_PUT_ERROR(EVP, rsa_algor_to_md, EVP_R_UNKNOWN_DIGEST);
+ }
+ 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) {
+ OPENSSL_PUT_ERROR(EVP, rsa_mgf1_to_md, EVP_R_UNSUPPORTED_MASK_ALGORITHM);
+ return NULL;
+ }
+ if (!maskHash) {
+ OPENSSL_PUT_ERROR(EVP, rsa_mgf1_to_md, EVP_R_UNSUPPORTED_MASK_PARAMETER);
+ return NULL;
+ }
+ md = EVP_get_digestbyobj(maskHash->algorithm);
+ if (md == NULL) {
+ OPENSSL_PUT_ERROR(EVP, rsa_mgf1_to_md, EVP_R_UNKNOWN_MASK_DIGEST);
+ return NULL;
+ }
+ return md;
+}
+
+/* rsa_ctx_to_pss converts EVP_PKEY_CTX in PSS mode into corresponding
+ * algorithm parameter, suitable for setting as an AlgorithmIdentifier. */
+static ASN1_STRING *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;
+
+ if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0 ||
+ EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0 ||
+ !EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) {
+ goto err;
+ }
+
+ if (saltlen == -1) {
+ saltlen = EVP_MD_size(sigmd);
+ } else if (saltlen == -2) {
+ saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
+ if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) {
+ saltlen--;
+ }
+ } else {
+ goto err;
+ }
+
+ pss = RSA_PSS_PARAMS_new();
+ if (!pss) {
+ goto err;
+ }
+
+ if (saltlen != 20) {
+ pss->saltLength = ASN1_INTEGER_new();
+ if (!pss->saltLength ||
+ !ASN1_INTEGER_set(pss->saltLength, saltlen)) {
+ goto err;
+ }
+ }
+
+ if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd) ||
+ !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;
+
+err:
+ if (pss)
+ RSA_PSS_PARAMS_free(pss);
+ if (rv)
+ return os;
+ if (os)
+ ASN1_STRING_free(os);
+ return NULL;
+}
+
+/* From PSS AlgorithmIdentifier set public key parameters. */
+static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, X509_ALGOR *sigalg, EVP_PKEY *pkey) {
+ int ret = 0;
+ int saltlen;
+ const EVP_MD *mgf1md = NULL, *md = NULL;
+ RSA_PSS_PARAMS *pss;
+ X509_ALGOR *maskHash;
+ EVP_PKEY_CTX *pkctx;
+
+ /* Sanity check: make sure it is PSS */
+ if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
+ OPENSSL_PUT_ERROR(EVP, rsa_pss_to_ctx, EVP_R_UNSUPPORTED_SIGNATURE_TYPE);
+ return 0;
+ }
+ /* Decode PSS parameters */
+ pss = rsa_pss_decode(sigalg, &maskHash);
+ if (pss == NULL) {
+ OPENSSL_PUT_ERROR(EVP, rsa_pss_to_ctx, EVP_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;
+ }
+
+ saltlen = 20;
+ 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) {
+ OPENSSL_PUT_ERROR(EVP, rsa_pss_to_ctx, EVP_R_INVALID_SALT_LENGTH);
+ goto err;
+ }
+ }
+
+ /* 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) {
+ OPENSSL_PUT_ERROR(EVP, rsa_pss_to_ctx, EVP_R_INVALID_TRAILER);
+ goto err;
+ }
+
+ if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey) ||
+ EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0 ||
+ EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0 ||
+ EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) {
+ goto err;
+ }
+
+ ret = 1;
+
+err:
+ RSA_PSS_PARAMS_free(pss);
+ if (maskHash) {
+ X509_ALGOR_free(maskHash);
+ }
+ return ret;
+}
+
+/* Customised RSA AlgorithmIdentifier handling. This is called when a signature
+ * is encountered requiring special handling. We currently only handle PSS. */
+static int rsa_digest_verify_init_from_algorithm(EVP_MD_CTX *ctx,
+ X509_ALGOR *sigalg,
+ EVP_PKEY *pkey) {
+ /* Sanity check: make sure it is PSS */
+ if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
+ OPENSSL_PUT_ERROR(EVP, rsa_digest_verify_init_from_algorithm,
+ EVP_R_UNSUPPORTED_SIGNATURE_TYPE);
+ return 0;
+ }
+ return rsa_pss_to_ctx(ctx, sigalg, pkey);
+}
+
+static evp_digest_sign_algorithm_result_t rsa_digest_sign_algorithm(
+ EVP_MD_CTX *ctx, X509_ALGOR *sigalg) {
+ int pad_mode;
+ EVP_PKEY_CTX *pkctx = ctx->pctx;
+ if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) {
+ return EVP_DIGEST_SIGN_ALGORITHM_ERROR;
+ }
+ if (pad_mode == RSA_PKCS1_PSS_PADDING) {
+ ASN1_STRING *os1 = rsa_ctx_to_pss(pkctx);
+ if (!os1) {
+ return EVP_DIGEST_SIGN_ALGORITHM_ERROR;
+ }
+ X509_ALGOR_set0(sigalg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os1);
+ return EVP_DIGEST_SIGN_ALGORITHM_SUCCESS;
+ }
+
+ /* Other padding schemes use the default behavior. */
+ return EVP_DIGEST_SIGN_ALGORITHM_DEFAULT;
+}
+
+const EVP_PKEY_ASN1_METHOD rsa_asn1_meth = {
+ EVP_PKEY_RSA,
+ EVP_PKEY_RSA,
+ ASN1_PKEY_SIGPARAM_NULL,
+
+ "RSA",
+ "OpenSSL RSA method",
+
+ rsa_pub_decode,
+ rsa_pub_encode,
+ rsa_pub_cmp,
+ rsa_pub_print,
+
+ rsa_priv_decode,
+ rsa_priv_encode,
+ rsa_priv_print,
+
+ rsa_opaque,
+ rsa_supports_digest,
+
+ int_rsa_size,
+ rsa_bits,
+
+ 0,0,0,0,0,0,
+
+ rsa_sig_print,
+ int_rsa_free,
+
+ old_rsa_priv_decode,
+ old_rsa_priv_encode,
+
+ rsa_digest_verify_init_from_algorithm,
+ rsa_digest_sign_algorithm,
+};
generated by cgit v1.1 at 2024-06-10 12:54:31 +0000