initial/final commitHEADmaster

1 files changed, 248 insertions, 0 deletions

diff --git a/openssl-1.1.0h/crypto/rsa/rsa_sign.c b/openssl-1.1.0h/crypto/rsa/rsa_sign.c
new file mode 100644
index 0000000..952d24f
--- /dev/null
+++ b/openssl-1.1.0h/crypto/rsa/rsa_sign.c
@@ -0,0 +1,248 @@
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/objects.h>
+#include <openssl/x509.h>
+#include "internal/x509_int.h"
+#include "rsa_locl.h"
+
+/* Size of an SSL signature: MD5+SHA1 */
+#define SSL_SIG_LENGTH  36
+
+/*
+ * encode_pkcs1 encodes a DigestInfo prefix of hash |type| and digest |m|, as
+ * described in EMSA-PKCS1-v1_5-ENCODE, RFC 3447 section 9.2 step 2. This
+ * encodes the DigestInfo (T and tLen) but does not add the padding.
+ *
+ * On success, it returns one and sets |*out| to a newly allocated buffer
+ * containing the result and |*out_len| to its length. The caller must free
+ * |*out| with |OPENSSL_free|. Otherwise, it returns zero.
+ */
+static int encode_pkcs1(unsigned char **out, int *out_len, int type,
+                        const unsigned char *m, unsigned int m_len)
+{
+    X509_SIG sig;
+    X509_ALGOR algor;
+    ASN1_TYPE parameter;
+    ASN1_OCTET_STRING digest;
+    uint8_t *der = NULL;
+    int len;
+
+    sig.algor = &algor;
+    sig.algor->algorithm = OBJ_nid2obj(type);
+    if (sig.algor->algorithm == NULL) {
+        RSAerr(RSA_F_ENCODE_PKCS1, RSA_R_UNKNOWN_ALGORITHM_TYPE);
+        return 0;
+    }
+    if (OBJ_length(sig.algor->algorithm) == 0) {
+        RSAerr(RSA_F_ENCODE_PKCS1,
+               RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
+        return 0;
+    }
+    parameter.type = V_ASN1_NULL;
+    parameter.value.ptr = NULL;
+    sig.algor->parameter = &parameter;
+
+    sig.digest = &digest;
+    sig.digest->data = (unsigned char *)m;
+    sig.digest->length = m_len;
+
+    len = i2d_X509_SIG(&sig, &der);
+    if (len < 0)
+        return 0;
+
+    *out = der;
+    *out_len = len;
+    return 1;
+}
+
+int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
+             unsigned char *sigret, unsigned int *siglen, RSA *rsa)
+{
+    int encrypt_len, encoded_len = 0, ret = 0;
+    unsigned char *tmps = NULL;
+    const unsigned char *encoded = NULL;
+
+    if (rsa->meth->rsa_sign) {
+        return rsa->meth->rsa_sign(type, m, m_len, sigret, siglen, rsa);
+    }
+
+    /* Compute the encoded digest. */
+    if (type == NID_md5_sha1) {
+        /*
+         * NID_md5_sha1 corresponds to the MD5/SHA1 combination in TLS 1.1 and
+         * earlier. It has no DigestInfo wrapper but otherwise is
+         * RSASSA-PKCS1-v1_5.
+         */
+        if (m_len != SSL_SIG_LENGTH) {
+            RSAerr(RSA_F_RSA_SIGN, RSA_R_INVALID_MESSAGE_LENGTH);
+            return 0;
+        }
+        encoded_len = SSL_SIG_LENGTH;
+        encoded = m;
+    } else {
+        if (!encode_pkcs1(&tmps, &encoded_len, type, m, m_len))
+            goto err;
+        encoded = tmps;
+    }
+
+    if (encoded_len > RSA_size(rsa) - RSA_PKCS1_PADDING_SIZE) {
+        RSAerr(RSA_F_RSA_SIGN, RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
+        goto err;
+    }
+    encrypt_len = RSA_private_encrypt(encoded_len, encoded, sigret, rsa,
+                                      RSA_PKCS1_PADDING);
+    if (encrypt_len <= 0)
+        goto err;
+
+    *siglen = encrypt_len;
+    ret = 1;
+
+err:
+    OPENSSL_clear_free(tmps, (size_t)encoded_len);
+    return ret;
+}
+
+/*
+ * int_rsa_verify verifies an RSA signature in |sigbuf| using |rsa|. It may be
+ * called in two modes. If |rm| is NULL, it verifies the signature for digest
+ * |m|. Otherwise, it recovers the digest from the signature, writing the digest
+ * to |rm| and the length to |*prm_len|. |type| is the NID of the digest
+ * algorithm to use. It returns one on successful verification and zero
+ * otherwise.
+ */
+int int_rsa_verify(int type, const unsigned char *m, unsigned int m_len,
+                   unsigned char *rm, size_t *prm_len,
+                   const unsigned char *sigbuf, size_t siglen, RSA *rsa)
+{
+    int decrypt_len, ret = 0, encoded_len = 0;
+    unsigned char *decrypt_buf = NULL, *encoded = NULL;
+
+    if (siglen != (size_t)RSA_size(rsa)) {
+        RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_WRONG_SIGNATURE_LENGTH);
+        return 0;
+    }
+
+    /* Recover the encoded digest. */
+    decrypt_buf = OPENSSL_malloc(siglen);
+    if (decrypt_buf == NULL) {
+        RSAerr(RSA_F_INT_RSA_VERIFY, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    decrypt_len = RSA_public_decrypt((int)siglen, sigbuf, decrypt_buf, rsa,
+                                     RSA_PKCS1_PADDING);
+    if (decrypt_len <= 0)
+        goto err;
+
+    if (type == NID_md5_sha1) {
+        /*
+         * NID_md5_sha1 corresponds to the MD5/SHA1 combination in TLS 1.1 and
+         * earlier. It has no DigestInfo wrapper but otherwise is
+         * RSASSA-PKCS1-v1_5.
+         */
+        if (decrypt_len != SSL_SIG_LENGTH) {
+            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
+            goto err;
+        }
+
+        if (rm != NULL) {
+            memcpy(rm, decrypt_buf, SSL_SIG_LENGTH);
+            *prm_len = SSL_SIG_LENGTH;
+        } else {
+            if (m_len != SSL_SIG_LENGTH) {
+                RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_MESSAGE_LENGTH);
+                goto err;
+            }
+
+            if (memcmp(decrypt_buf, m, SSL_SIG_LENGTH) != 0) {
+                RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
+                goto err;
+            }
+        }
+    } else if (type == NID_mdc2 && decrypt_len == 2 + 16
+               && decrypt_buf[0] == 0x04 && decrypt_buf[1] == 0x10) {
+        /*
+         * Oddball MDC2 case: signature can be OCTET STRING. check for correct
+         * tag and length octets.
+         */
+        if (rm != NULL) {
+            memcpy(rm, decrypt_buf + 2, 16);
+            *prm_len = 16;
+        } else {
+            if (m_len != 16) {
+                RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_MESSAGE_LENGTH);
+                goto err;
+            }
+
+            if (memcmp(m, decrypt_buf + 2, 16) != 0) {
+                RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
+                goto err;
+            }
+        }
+    } else {
+        /*
+         * If recovering the digest, extract a digest-sized output from the end
+         * of |decrypt_buf| for |encode_pkcs1|, then compare the decryption
+         * output as in a standard verification.
+         */
+        if (rm != NULL) {
+            const EVP_MD *md = EVP_get_digestbynid(type);
+            if (md == NULL) {
+                RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_UNKNOWN_ALGORITHM_TYPE);
+                goto err;
+            }
+
+            m_len = EVP_MD_size(md);
+            if (m_len > (size_t)decrypt_len) {
+                RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_INVALID_DIGEST_LENGTH);
+                goto err;
+            }
+            m = decrypt_buf + decrypt_len - m_len;
+        }
+
+        /* Construct the encoded digest and ensure it matches. */
+        if (!encode_pkcs1(&encoded, &encoded_len, type, m, m_len))
+            goto err;
+
+        if (encoded_len != decrypt_len
+            || memcmp(encoded, decrypt_buf, encoded_len) != 0) {
+            RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_BAD_SIGNATURE);
+            goto err;
+        }
+
+        /* Output the recovered digest. */
+        if (rm != NULL) {
+            memcpy(rm, m, m_len);
+            *prm_len = m_len;
+        }
+    }
+
+    ret = 1;
+
+err:
+    OPENSSL_clear_free(encoded, (size_t)encoded_len);
+    OPENSSL_clear_free(decrypt_buf, siglen);
+    return ret;
+}
+
+int RSA_verify(int type, const unsigned char *m, unsigned int m_len,
+               const unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
+{
+
+    if (rsa->meth->rsa_verify) {
+        return rsa->meth->rsa_verify(type, m, m_len, sigbuf, siglen, rsa);
+    }
+
+    return int_rsa_verify(type, m, m_len, NULL, NULL, sigbuf, siglen, rsa);
+}