#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)
{
unsigned char *penc = NULL;
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)
{
if (!pss)
return NULL;
-
- if (pss->maskGenAlgorithm)
- {
- ASN1_TYPE *param = pss->maskGenAlgorithm->parameter;
- if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) == NID_mgf1
- && param->type == V_ASN1_SEQUENCE)
- {
- p = param->value.sequence->data;
- plen = param->value.sequence->length;
- *pmaskHash = d2i_X509_ALGOR(NULL, &p, plen);
- }
- }
+
+ *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
return pss;
}
if (!BIO_indent(bp, indent, 128))
goto err;
- if (BIO_puts(bp, "Salt Length: ") <= 0)
+ 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, "20 (default)") <= 0)
+ 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: ") <= 0)
+ 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, "0xbc (default)") <= 0)
+ else if (BIO_puts(bp, "BC (default)") <= 0)
goto err;
BIO_puts(bp, "\n");
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;
#ifndef OPENSSL_NO_CMS
case ASN1_PKEY_CTRL_CMS_SIGN:
if (arg1 == 0)
- CMS_SignerInfo_get0_algs(arg2, NULL, NULL, NULL, &alg);
+ return rsa_cms_sign(arg2);
+ else if (arg1 == 1)
+ return rsa_cms_verify(arg2);
break;
case ASN1_PKEY_CTRL_CMS_ENVELOPE:
if (arg1 == 0)
- CMS_RecipientInfo_ktri_get0_algs(arg2, NULL, NULL, &alg);
+ 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:
}
-/* Customised RSA item verification routine. This is called
- * when a signature is encountered requiring special handling. We
- * currently only handle PSS.
+/* 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;
+ }
-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)
+/* 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;
- EVP_PKEY_CTX *pkctx;
/* 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);
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
return -1;
}
/* Decode PSS parameters */
if (pss == NULL)
{
- RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_PSS_PARAMETERS);
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
goto err;
}
- /* Check mask and lookup mask hash algorithm */
- if (pss->maskGenAlgorithm)
- {
- if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) != NID_mgf1)
- {
- RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
- goto err;
- }
- if (!maskHash)
- {
- RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_MASK_PARAMETER);
- goto err;
- }
- mgf1md = EVP_get_digestbyobj(maskHash->algorithm);
- if (mgf1md == NULL)
- {
- RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_MASK_DIGEST);
- goto err;
- }
- }
- else
- mgf1md = EVP_sha1();
-
- if (pss->hashAlgorithm)
- {
- md = EVP_get_digestbyobj(pss->hashAlgorithm->algorithm);
- if (md == NULL)
- {
- RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_PSS_DIGEST);
- goto err;
- }
- }
- else
- md = EVP_sha1();
+ 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)
{
*/
if (saltlen < 0)
{
- RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_SALT_LENGTH);
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
goto err;
}
}
*/
if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1)
{
- RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_TRAILER);
+ RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
goto err;
}
/* We have all parameters now set up context */
- if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
- goto err;
+ 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_mgf1_md(pkctx, mgf1md) <= 0)
goto err;
/* Carry on */
- rv = 2;
+ rv = 1;
err:
RSA_PSS_PARAMS_free(pss);
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)
return 2;
if (pad_mode == RSA_PKCS1_PSS_PADDING)
{
- const EVP_MD *sigmd, *mgf1md;
- RSA_PSS_PARAMS *pss = NULL;
- X509_ALGOR *mgf1alg = NULL;
- ASN1_STRING *os1 = NULL, *os2 = NULL;
- EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
- int saltlen, rv = 0;
- sigmd = EVP_MD_CTX_md(ctx);
- 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;
- 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 (EVP_MD_type(sigmd) != NID_sha1)
- {
- pss->hashAlgorithm = X509_ALGOR_new();
- if (!pss->hashAlgorithm)
- goto err;
- X509_ALGOR_set_md(pss->hashAlgorithm, sigmd);
- }
- if (EVP_MD_type(mgf1md) != NID_sha1)
- {
- ASN1_STRING *stmp = NULL;
- /* need to embed algorithm ID inside another */
- mgf1alg = X509_ALGOR_new();
- X509_ALGOR_set_md(mgf1alg, mgf1md);
- if (!ASN1_item_pack(mgf1alg, ASN1_ITEM_rptr(X509_ALGOR),
- &stmp))
- goto err;
- pss->maskGenAlgorithm = X509_ALGOR_new();
- if (!pss->maskGenAlgorithm)
- goto err;
- X509_ALGOR_set0(pss->maskGenAlgorithm,
- OBJ_nid2obj(NID_mgf1),
- V_ASN1_SEQUENCE, stmp);
- }
- /* Finally create string with pss parameter encoding. */
- if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os1))
- goto err;
+ ASN1_STRING *os1 = NULL;
+ os1 = rsa_ctx_to_pss(pkctx);
+ if (!os1)
+ return 0;
+ /* Duplicate parameters if we have to */
if (alg2)
{
- os2 = ASN1_STRING_dup(os1);
+ ASN1_STRING *os2 = ASN1_STRING_dup(os1);
if (!os2)
- goto err;
+ {
+ 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);
- os1 = os2 = NULL;
- rv = 3;
- err:
- if (mgf1alg)
- X509_ALGOR_free(mgf1alg);
- if (pss)
- RSA_PSS_PARAMS_free(pss);
- if (os1)
- ASN1_STRING_free(os1);
- return rv;
-
+ 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[] =
{
{
projects / openssl.git / blobdiff