-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* crypto/rsa/rsa_pmeth.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>
+#include <openssl/evp.h>
#include "evp_locl.h"
+#include "rsa_locl.h"
/* RSA pkey context structure */
/* 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;
+ /* message digest for MGF1 */
+ const EVP_MD *mgf1md;
+ /* PSS/OAEP salt length */
+ int saltlen;
+ /* Temp buffer */
+ unsigned char *tbuf;
} RSA_PKEY_CTX;
static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
rctx->nbits = 1024;
rctx->pub_exp = NULL;
rctx->pad_mode = RSA_PKCS1_PADDING;
+ rctx->md = NULL;
+ rctx->mgf1md = 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;
}
{
if (rctx->pub_exp)
BN_free(rctx->pub_exp);
+ if (rctx->tbuf)
+ OPENSSL_free(rctx->tbuf);
+ OPENSSL_free(rctx);
}
- OPENSSL_free(rctx);
}
-static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, int *siglen,
- unsigned char *tbs, int tbslen)
+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;
- ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
+ 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_mgf1(rsa,
+ rctx->tbuf, tbs,
+ rctx->md, rctx->mgf1md,
+ 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;
static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
- unsigned char *sig, int *siglen,
- unsigned char *tbs, int tbslen)
+ unsigned char *rout, size_t *routlen,
+ const unsigned char *sig, size_t siglen)
{
int ret;
RSA_PKEY_CTX *rctx = ctx->data;
- ret = RSA_public_decrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
+
+ 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;
- *siglen = ret;
+ *routlen = ret;
return 1;
}
-static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, int *outlen,
- unsigned char *in, int inlen)
+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_mgf1(rsa, tbs,
+ rctx->md, rctx->mgf1md,
+ 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;
return 1;
}
-static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, int *outlen,
- unsigned char *in, int inlen)
+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;
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:
- /* TODO: add PSS support */
- if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_X931_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;
}
- return 0;
+ 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_RSA_MGF1_MD:
+ rctx->mgf1md = 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 (!value)
- return 0;
if (!strcmp(value, "pkcs1"))
pm = RSA_PKCS1_PADDING;
else if (!strcmp(value, "sslv23"))
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 pkey_rsa_ctrl(ctx, EVP_PKEY_CTRL_RSA_PADDING, pm, NULL);
+ }
+ 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,
- 0,
+ EVP_PKEY_FLAG_AUTOARGLEN,
pkey_rsa_init,
+ pkey_rsa_copy,
pkey_rsa_cleanup,
0,0,
- 0,0,
+ 0,
+ pkey_rsa_keygen,
0,
pkey_rsa_sign,
- 0,0,
+ 0,
+ pkey_rsa_verify,
0,
pkey_rsa_verifyrecover,
0,
pkey_rsa_decrypt,
+ 0,0,
+
pkey_rsa_ctrl,
pkey_rsa_ctrl_str
projects / openssl.git / blobdiff