-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* crypto/rsa/rsa_ameth.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 2006.
*/
/* ====================================================================
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/rsa.h>
+#include <openssl/bn.h>
+#ifndef OPENSSL_NO_CMS
+#include <openssl/cms.h>
+#endif
+#include "asn1_locl.h"
+
+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);
static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
{
return 1;
}
-static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
+static int old_rsa_priv_decode(EVP_PKEY *pkey,
+ const unsigned char **pder, int derlen)
{
- const unsigned char *p;
- int pklen;
- RSA *rsa = NULL;
- if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
- return 0;
- if (!(rsa = d2i_RSAPrivateKey (NULL, &p, pklen)))
+ RSA *rsa;
+ if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen)))
{
- RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
+ RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
return 0;
}
- EVP_PKEY_assign_RSA (pkey, rsa);
+ 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);
+ }
+
static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
{
unsigned char *rk = NULL;
return 1;
}
+static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
+ {
+ const unsigned char *p;
+ int pklen;
+ if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
+ return 0;
+ return old_rsa_priv_decode(pkey, &p, pklen);
+ }
+
static int int_rsa_size(const EVP_PKEY *pkey)
{
return RSA_size(pkey->pkey.rsa);
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=(unsigned char *)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:
+ 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 unsigned char *p;
+ int plen;
+ if (alg == NULL)
+ return NULL;
+ if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
+ return NULL;
+ if (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 unsigned char *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)
+ goto err;
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+ if (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)
+ goto err;
+
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+
+ if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
+ goto err;
+ if (pss->maskGenAlgorithm)
+ {
+ if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
+ goto err;
+ if (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))
+ goto err;
+ if (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, "0x14 (default)") <= 0)
+ goto err;
+ BIO_puts(bp, "\n");
+
+ if (!BIO_indent(bp, indent, 128))
+ goto err;
+ if (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 rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
+ {
+ X509_ALGOR *alg = NULL;
+ switch (op)
+ {
+
+ case ASN1_PKEY_CTRL_PKCS7_SIGN:
+ if (arg1 == 0)
+ PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
+ break;
+
+ case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
+ if (arg1 == 0)
+ PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
+ break;
+#ifndef OPENSSL_NO_CMS
+ case ASN1_PKEY_CTRL_CMS_SIGN:
+ if (arg1 == 0)
+ return rsa_cms_sign(arg2);
+ else if (arg1 == 1)
+ return rsa_cms_verify(arg2);
+ break;
+
+ case ASN1_PKEY_CTRL_CMS_ENVELOPE:
+ if (arg1 == 0)
+ return rsa_cms_encrypt(arg2);
+ else if (arg1 == 1)
+ return rsa_cms_decrypt(arg2);
+ break;
+
+ case ASN1_PKEY_CTRL_CMS_RI_TYPE:
+ *(int *)arg2 = CMS_RECIPINFO_TRANS;
+ return 1;
+#endif
+
+ case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
+ *(int *)arg2 = NID_sha1;
+ return 1;
+
+ default:
+ return -2;
+
+ }
+
+ if (alg)
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
+ V_ASN1_NULL, 0);
+
+ return 1;
+
+ }
+
+/* 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))
+ goto err;
+ if (!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)
+ RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_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)
+ {
+ 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,
+ * suitable for setting 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)
+ goto err;
+ if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
+ goto err;
+ if (!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--;
+ }
+ pss = RSA_PSS_PARAMS_new();
+ if (!pss)
+ goto err;
+ if (saltlen != 20)
+ {
+ pss->saltLength = ASN1_INTEGER_new();
+ if (!pss->saltLength)
+ goto err;
+ if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
+ goto err;
+ }
+ if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
+ goto err;
+ 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;
+ 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. If pkey
+ * isn't NULL then the EVP_MD_CTX is setup and initalised. If it
+ * is NULL parameters are passed to pkctx instead.
+ */
+
+static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
+ X509_ALGOR *sigalg, EVP_PKEY *pkey)
+ {
+ int rv = -1;
+ 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)
+ {
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
+ return -1;
+ }
+ /* Decode PSS parameters */
+ pss = rsa_pss_decode(sigalg, &maskHash);
+
+ if (pss == NULL)
+ {
+ 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;
+ }
+ else
+ {
+ const EVP_MD *checkmd;
+ if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
+ goto err;
+ if (EVP_MD_type(md) != EVP_MD_type(checkmd))
+ {
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
+ goto err;
+ }
+ }
+
+ if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
+ goto err;
+
+ if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
+ goto err;
+
+ if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
+ goto err;
+ /* Carry on */
+ rv = 1;
+
+ err:
+ RSA_PSS_PARAMS_free(pss);
+ if (maskHash)
+ X509_ALGOR_free(maskHash);
+ return rv;
+ }
+
+static int rsa_cms_verify(CMS_SignerInfo *si)
+ {
+ int nid, nid2;
+ X509_ALGOR *alg;
+ EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
+ CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
+ nid = OBJ_obj2nid(alg->algorithm);
+ if (nid == NID_rsaEncryption)
+ return 1;
+ if (nid == NID_rsassaPss)
+ 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))
+ {
+ if (nid2 == NID_rsaEncryption)
+ return 1;
+ }
+ return 0;
+ }
+
+/* Customised RSA item verification routine. This is called
+ * when a signature is encountered requiring special handling. We
+ * currently only handle PSS.
+ */
+
+
+static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
+ X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
+ EVP_PKEY *pkey)
+ {
+ /* Sanity check: make sure it is PSS */
+ if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss)
+ {
+ RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
+ return -1;
+ }
+ if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey))
+ /* Carry on */
+ return 2;
+ return -1;
+ }
+
+static int rsa_cms_sign(CMS_SignerInfo *si)
+ {
+ int pad_mode = RSA_PKCS1_PADDING;
+ X509_ALGOR *alg;
+ EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
+ ASN1_STRING *os = NULL;
+ CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
+ if (pkctx)
+ {
+ if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
+ return 0;
+ }
+ if (pad_mode == RSA_PKCS1_PADDING)
+ {
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
+ V_ASN1_NULL, 0);
+ return 1;
+ }
+ /* We don't support it */
+ if (pad_mode != RSA_PKCS1_PSS_PADDING)
+ return 0;
+ os = rsa_ctx_to_pss(pkctx);
+ if (!os)
+ return 0;
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
+ return 1;
+ }
+
+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;
+ 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);
+ if (!os1)
+ return 0;
+ /* Duplicate parameters if we have to */
+ if (alg2)
+ {
+ ASN1_STRING *os2 = ASN1_STRING_dup(os1);
+ if (!os2)
+ {
+ ASN1_STRING_free(os1);
+ return 0;
+ }
+ X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
+ V_ASN1_SEQUENCE, os2);
+ }
+ X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
+ V_ASN1_SEQUENCE, os1);
+ return 3;
+ }
+ return 2;
+ }
+
+static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
+ X509_ALGOR **pmaskHash)
+ {
+ const unsigned char *p;
+ int plen;
+ RSA_OAEP_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_OAEP_PARAMS(NULL, &p, plen);
+
+ if (!pss)
+ return NULL;
+
+ *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
+
+ return pss;
+ }
+
+static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
+ {
+ EVP_PKEY_CTX *pkctx;
+ X509_ALGOR *cmsalg;
+ int nid;
+ int rv = -1;
+ unsigned char *label = NULL;
+ 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;
+ if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
+ return -1;
+ nid = OBJ_obj2nid(cmsalg->algorithm);
+ if (nid == NID_rsaEncryption)
+ return 1;
+ if (nid != NID_rsaesOaep)
+ {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
+ return -1;
+ }
+ /* Decode OAEP parameters */
+ oaep = rsa_oaep_decode(cmsalg, &maskHash);
+
+ if (oaep == NULL)
+ {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
+ goto err;
+ }
+
+ mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
+ if (!mgf1md)
+ goto err;
+ md = rsa_algor_to_md(oaep->hashFunc);
+ if (!md)
+ goto err;
+
+ if (oaep->pSourceFunc)
+ {
+ X509_ALGOR *plab = oaep->pSourceFunc;
+ if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified)
+ {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
+ goto err;
+ }
+ if (plab->parameter->type != V_ASN1_OCTET_STRING)
+ {
+ RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
+ goto err;
+ }
+
+ label = plab->parameter->value.octet_string->data;
+ /* Stop label being freed when OAEP parameters are freed */
+ plab->parameter->value.octet_string->data = NULL;
+ labellen = plab->parameter->value.octet_string->length;
+ }
+
+ if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
+ goto err;
+ /* Carry on */
+ rv = 1;
+
+ err:
+ RSA_OAEP_PARAMS_free(oaep);
+ if (maskHash)
+ X509_ALGOR_free(maskHash);
+ return rv;
+ }
+
+static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
+ {
+ const EVP_MD *md, *mgf1md;
+ RSA_OAEP_PARAMS *oaep = NULL;
+ ASN1_STRING *os = NULL;
+ X509_ALGOR *alg;
+ EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+ int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
+ unsigned char *label;
+ CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
+ if (pkctx)
+ {
+ if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
+ return 0;
+ }
+ if (pad_mode == RSA_PKCS1_PADDING)
+ {
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
+ V_ASN1_NULL, 0);
+ return 1;
+ }
+ /* Not supported */
+ if (pad_mode != RSA_PKCS1_OAEP_PADDING)
+ return 0;
+ if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
+ goto err;
+ if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
+ goto err;
+ labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
+ if (labellen < 0)
+ goto err;
+ oaep = RSA_OAEP_PARAMS_new();
+ if (!oaep)
+ 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();
+ oaep->pSourceFunc = X509_ALGOR_new();
+ if (!oaep->pSourceFunc)
+ goto err;
+ if (!los)
+ goto err;
+ if (!ASN1_OCTET_STRING_set(los, label, labellen))
+ {
+ ASN1_OCTET_STRING_free(los);
+ goto err;
+ }
+ X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
+ V_ASN1_OCTET_STRING, los);
+ }
+ /* create string with pss parameter encoding. */
+ if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
+ goto err;
+ X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
+ os = NULL;
+ rv = 1;
+ err:
+ if (oaep)
+ RSA_OAEP_PARAMS_free(oaep);
+ if (os)
+ ASN1_STRING_free(os);
+ return rv;
+ }
+
const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] =
{
{
EVP_PKEY_RSA,
EVP_PKEY_RSA,
- 0,
+ ASN1_PKEY_SIGPARAM_NULL,
+
+ "RSA",
+ "OpenSSL RSA method",
rsa_pub_decode,
rsa_pub_encode,
rsa_pub_cmp,
- 0,
+ rsa_pub_print,
rsa_priv_decode,
rsa_priv_encode,
- 0,
+ rsa_priv_print,
int_rsa_size,
rsa_bits,
0,0,0,0,0,0,
+ rsa_sig_print,
int_rsa_free,
- 0
+ rsa_pkey_ctrl,
+ old_rsa_priv_decode,
+ old_rsa_priv_encode,
+ rsa_item_verify,
+ rsa_item_sign
},
{
projects / openssl.git / blobdiff