#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/rsa.h>
-#include "asn1_locl.h"
+#include <openssl/evp.h>
#include "evp_locl.h"
+extern int int_rsa_verify(int dtype, const unsigned char *m, unsigned int m_len,
+ unsigned char *rm, unsigned int *prm_len,
+ const unsigned char *sigbuf, unsigned int siglen,
+ RSA *rsa);
+
+/* RSA pkey context structure */
+
+typedef struct
+ {
+ /* 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;
+ /* PSS/OAEP salt length */
+ int saltlen;
+ /* Temp buffer */
+ unsigned char *tbuf;
+ } RSA_PKEY_CTX;
+
+static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
+ {
+ RSA_PKEY_CTX *rctx;
+ rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
+ if (!rctx)
+ return 0;
+ rctx->nbits = 1024;
+ rctx->pub_exp = NULL;
+ rctx->pad_mode = RSA_PKCS1_PADDING;
+ rctx->md = NULL;
+ rctx->tbuf = NULL;
+
+ rctx->saltlen = -2;
+
+ ctx->data = rctx;
+ ctx->keygen_info = rctx->gentmp;
+ ctx->keygen_info_count = 2;
+
+ 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;
+ }
+
+static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
+ {
+ RSA_PKEY_CTX *rctx = ctx->data;
+ if (rctx)
+ {
+ if (rctx->pub_exp)
+ BN_free(rctx->pub_exp);
+ if (rctx->tbuf)
+ OPENSSL_free(rctx->tbuf);
+ }
+ OPENSSL_free(rctx);
+ }
+
+static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, int *siglen,
+ const unsigned char *tbs, int tbslen)
+ {
+ int ret;
+ RSA_PKEY_CTX *rctx = ctx->data;
+ RSA *rsa = ctx->pkey->pkey.rsa;
+
+ if (rctx->md)
+ {
+ if (tbslen != 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(rsa, rctx->tbuf, tbs,
+ rctx->md, 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;
+ *siglen = ret;
+ return 1;
+ }
+
+
+static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
+ unsigned char *rout, int *routlen,
+ const unsigned char *sig, int siglen)
+ {
+ int ret;
+ RSA_PKEY_CTX *rctx = ctx->data;
+
+ 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)
+ {
+ unsigned int 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;
+ *routlen = ret;
+ return 1;
+ }
+
+static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
+ const unsigned char *sig, int siglen,
+ const unsigned char *tbs, int tbslen)
+ {
+ RSA_PKEY_CTX *rctx = ctx->data;
+ RSA *rsa = ctx->pkey->pkey.rsa;
+ int 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(rsa, tbs, rctx->md,
+ 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, int *outlen,
+ const unsigned char *in, int inlen)
+ {
+ int ret;
+ RSA_PKEY_CTX *rctx = ctx->data;
+ ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
+ rctx->pad_mode);
+ if (ret < 0)
+ return ret;
+ *outlen = ret;
+ return 1;
+ }
+
+static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, int *outlen,
+ const unsigned char *in, int inlen)
+ {
+ int ret;
+ RSA_PKEY_CTX *rctx = ctx->data;
+ ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
+ rctx->pad_mode);
+ if (ret < 0)
+ return ret;
+ *outlen = ret;
+ 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_NID, 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_NID,
+ 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:
+ 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_VERIFYRECOVER)
+ return -2;
+ if (!rctx->md)
+ rctx->md = EVP_sha1();
+ }
+ if (p1 == RSA_PKCS1_OAEP_PADDING)
+ {
+ if (!(ctx->operation & EVP_PKEY_OP_TYPE_CRYPT))
+ return -2;
+ if (!rctx->md)
+ rctx->md = EVP_sha1();
+ }
+ rctx->pad_mode = p1;
+ return 1;
+ }
+ return -2;
+
+ case EVP_PKEY_CTRL_RSA_PSS_SALTLEN:
+ if (p1 < -2)
+ return -2;
+ if (rctx->pad_mode != RSA_PKCS1_PSS_PADDING)
+ return -2;
+ rctx->saltlen = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_RSA_KEYGEN_BITS:
+ if (p1 < 256)
+ 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;
+
+ default:
+ return -2;
+
+ }
+ }
+
+static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
+ const char *type, const char *value)
+ {
+ 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_SSLV23_PADDING;
+ else if (!strcmp(value, "none"))
+ pm = RSA_NO_PADDING;
+ else if (!strcmp(value, "oeap"))
+ 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
+ return -2;
+ 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,
+ pkey_rsa_init,
+ pkey_rsa_cleanup,
+
+ 0,0,
+
+ 0,
+ pkey_rsa_keygen,
+
+ 0,
+ pkey_rsa_sign,
+
+ 0,
+ pkey_rsa_verify,
+
+ 0,
+ pkey_rsa_verifyrecover,
+
+
+ 0,0,0,0,
+
+ 0,
+ pkey_rsa_encrypt,
+
+ 0,
+ pkey_rsa_decrypt,
+
+ pkey_rsa_ctrl,
+ pkey_rsa_ctrl_str
+
+
};
projects / openssl.git / blobdiff