+#ifndef OPENSSL_NO_RMD160
+# include <openssl/ripemd.h> /* uses RIPEMD160_DIGEST_LENGTH */
+#endif
+#include <openssl/sha.h> /* uses SHA???_DIGEST_LENGTH */
+#include "crypto/rsa.h"
+#include "rsa_local.h"
+
+/*
+ * The general purpose ASN1 code is not available inside the FIPS provider.
+ * To remove the dependency RSASSA-PKCS1-v1_5 DigestInfo encodings can be
+ * treated as a special case by pregenerating the required ASN1 encoding.
+ * This encoding will also be shared by the default provider.
+ *
+ * The EMSA-PKCS1-v1_5 encoding method includes an ASN.1 value of type
+ * DigestInfo, where the type DigestInfo has the syntax
+ *
+ * DigestInfo ::= SEQUENCE {
+ * digestAlgorithm DigestAlgorithm,
+ * digest OCTET STRING
+ * }
+ *
+ * DigestAlgorithm ::= AlgorithmIdentifier {
+ * {PKCS1-v1-5DigestAlgorithms}
+ * }
+ *
+ * The AlgorithmIdentifier is a sequence containing the digest OID and
+ * parameters (a value of type NULL).
+ *
+ * The ENCODE_DIGESTINFO_SHA() and ENCODE_DIGESTINFO_MD() macros define an
+ * initialized array containing the DER encoded DigestInfo for the specified
+ * SHA or MD digest. The content of the OCTET STRING is not included.
+ * |name| is the digest name.
+ * |n| is last byte in the encoded OID for the digest.
+ * |sz| is the digest length in bytes. It must not be greater than 110.
+ */
+
+#define ASN1_SEQUENCE 0x30
+#define ASN1_OCTET_STRING 0x04
+#define ASN1_NULL 0x05
+#define ASN1_OID 0x06
+
+/* SHA OIDs are of the form: (2 16 840 1 101 3 4 2 |n|) */
+#define ENCODE_DIGESTINFO_SHA(name, n, sz) \
+static const unsigned char digestinfo_##name##_der[] = { \
+ ASN1_SEQUENCE, 0x11 + sz, \
+ ASN1_SEQUENCE, 0x0d, \
+ ASN1_OID, 0x09, 2 * 40 + 16, 0x86, 0x48, 1, 101, 3, 4, 2, n, \
+ ASN1_NULL, 0x00, \
+ ASN1_OCTET_STRING, sz \
+};
+
+/* MD2, MD4 and MD5 OIDs are of the form: (1 2 840 113549 2 |n|) */
+#define ENCODE_DIGESTINFO_MD(name, n, sz) \
+static const unsigned char digestinfo_##name##_der[] = { \
+ ASN1_SEQUENCE, 0x10 + sz, \
+ ASN1_SEQUENCE, 0x0c, \
+ ASN1_OID, 0x08, 1 * 40 + 2, 0x86, 0x48, 0x86, 0xf7, 0x0d, 2, n, \
+ ASN1_NULL, 0x00, \
+ ASN1_OCTET_STRING, sz \
+};
+
+#ifndef FIPS_MODE
+# ifndef OPENSSL_NO_MD2
+ENCODE_DIGESTINFO_MD(md2, 0x02, MD2_DIGEST_LENGTH)
+# endif
+# ifndef OPENSSL_NO_MD4
+ENCODE_DIGESTINFO_MD(md4, 0x03, MD4_DIGEST_LENGTH)
+# endif
+# ifndef OPENSSL_NO_MD5
+ENCODE_DIGESTINFO_MD(md5, 0x05, MD5_DIGEST_LENGTH)
+# endif
+# ifndef OPENSSL_NO_MDC2
+/* MDC-2 (2 5 8 3 101) */
+static const unsigned char digestinfo_mdc2_der[] = {
+ ASN1_SEQUENCE, 0x0c + MDC2_DIGEST_LENGTH,
+ ASN1_SEQUENCE, 0x08,
+ ASN1_OID, 0x04, 2 * 40 + 5, 8, 3, 101,
+ ASN1_NULL, 0x00,
+ ASN1_OCTET_STRING, MDC2_DIGEST_LENGTH
+};
+# endif
+# ifndef OPENSSL_NO_RMD160
+/* RIPEMD160 (1 3 36 3 3 1 2) */
+static const unsigned char digestinfo_ripemd160_der[] = {
+ ASN1_SEQUENCE, 0x0c + RIPEMD160_DIGEST_LENGTH,
+ ASN1_SEQUENCE, 0x08,
+ ASN1_OID, 0x04, 1 * 40 + 3, 36, 3, 3, 1, 2,
+ ASN1_NULL, 0x00,
+ ASN1_OCTET_STRING, RIPEMD160_DIGEST_LENGTH
+};
+# endif
+#endif /* FIPS_MODE */
+
+/* SHA-1 (1 3 14 3 2 26) */
+static const unsigned char digestinfo_sha1_der[] = {
+ ASN1_SEQUENCE, 0x0d + SHA_DIGEST_LENGTH,
+ ASN1_SEQUENCE, 0x09,
+ ASN1_OID, 0x05, 1 * 40 + 3, 14, 3, 2, 26,
+ ASN1_NULL, 0x00,
+ ASN1_OCTET_STRING, SHA_DIGEST_LENGTH
+};
+
+ENCODE_DIGESTINFO_SHA(sha256, 0x01, SHA256_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha384, 0x02, SHA384_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha512, 0x03, SHA512_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha224, 0x04, SHA224_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha512_224, 0x05, SHA224_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha512_256, 0x06, SHA256_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha3_224, 0x07, SHA224_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha3_256, 0x08, SHA256_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha3_384, 0x09, SHA384_DIGEST_LENGTH)
+ENCODE_DIGESTINFO_SHA(sha3_512, 0x0a, SHA512_DIGEST_LENGTH)
+
+#define MD_CASE(name) \
+ case NID_##name: \
+ *len = sizeof(digestinfo_##name##_der); \
+ return digestinfo_##name##_der;
+
+const unsigned char *rsa_digestinfo_encoding(int md_nid, size_t *len)
+{
+ switch (md_nid) {
+#ifndef FIPS_MODE
+# ifndef OPENSSL_NO_MDC2
+ MD_CASE(mdc2)
+# endif
+# ifndef OPENSSL_NO_MD2
+ MD_CASE(md2)
+# endif
+# ifndef OPENSSL_NO_MD4
+ MD_CASE(md4)
+# endif
+# ifndef OPENSSL_NO_MD5
+ MD_CASE(md5)
+# endif
+# ifndef OPENSSL_NO_RMD160
+ MD_CASE(ripemd160)
+# endif
+#endif /* FIPS_MODE */
+ MD_CASE(sha1)
+ MD_CASE(sha224)
+ MD_CASE(sha256)
+ MD_CASE(sha384)
+ MD_CASE(sha512)
+ MD_CASE(sha512_224)
+ MD_CASE(sha512_256)
+ MD_CASE(sha3_224)
+ MD_CASE(sha3_256)
+ MD_CASE(sha3_384)
+ MD_CASE(sha3_512)
+ default:
+ return NULL;
+ }
+}
+
+#define MD_NID_CASE(name, sz) \
+ case NID_##name: \
+ return sz;
+
+static int digest_sz_from_nid(int nid)
+{
+ switch (nid) {
+#ifndef FIPS_MODE
+# ifndef OPENSSL_NO_MDC2
+ MD_NID_CASE(mdc2, MDC2_DIGEST_LENGTH)
+# endif
+# ifndef OPENSSL_NO_MD2
+ MD_NID_CASE(md2, MD2_DIGEST_LENGTH)
+# endif
+# ifndef OPENSSL_NO_MD4
+ MD_NID_CASE(md4, MD4_DIGEST_LENGTH)
+# endif
+# ifndef OPENSSL_NO_MD5
+ MD_NID_CASE(md5, MD5_DIGEST_LENGTH)
+# endif
+# ifndef OPENSSL_NO_RMD160
+ MD_NID_CASE(ripemd160, RIPEMD160_DIGEST_LENGTH)
+# endif
+#endif /* FIPS_MODE */
+ MD_NID_CASE(sha1, SHA_DIGEST_LENGTH)
+ MD_NID_CASE(sha224, SHA224_DIGEST_LENGTH)
+ MD_NID_CASE(sha256, SHA256_DIGEST_LENGTH)
+ MD_NID_CASE(sha384, SHA384_DIGEST_LENGTH)
+ MD_NID_CASE(sha512, SHA512_DIGEST_LENGTH)
+ MD_NID_CASE(sha512_224, SHA224_DIGEST_LENGTH)
+ MD_NID_CASE(sha512_256, SHA256_DIGEST_LENGTH)
+ MD_NID_CASE(sha3_224, SHA224_DIGEST_LENGTH)
+ MD_NID_CASE(sha3_256, SHA256_DIGEST_LENGTH)
+ MD_NID_CASE(sha3_384, SHA384_DIGEST_LENGTH)
+ MD_NID_CASE(sha3_512, SHA512_DIGEST_LENGTH)
+ default:
+ return 0;
+ }
+}
+
+
+/* Size of an SSL signature: MD5+SHA1 */
+#define SSL_SIG_LENGTH 36
+
+/*
+ * 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, size_t *out_len, int type,
+ const unsigned char *m, size_t m_len)
+{
+ size_t di_prefix_len, dig_info_len;
+ const unsigned char *di_prefix;
+ unsigned char *dig_info;
+
+ if (type == NID_undef) {
+ RSAerr(RSA_F_ENCODE_PKCS1, RSA_R_UNKNOWN_ALGORITHM_TYPE);
+ return 0;
+ }
+ di_prefix = rsa_digestinfo_encoding(type, &di_prefix_len);
+ if (di_prefix == NULL) {
+ RSAerr(RSA_F_ENCODE_PKCS1,
+ RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
+ return 0;
+ }
+ dig_info_len = di_prefix_len + m_len;
+ dig_info = OPENSSL_malloc(dig_info_len);
+ if (dig_info == NULL) {
+ RSAerr(RSA_F_ENCODE_PKCS1, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ memcpy(dig_info, di_prefix, di_prefix_len);
+ memcpy(dig_info + di_prefix_len, m, m_len);
+
+ *out = dig_info;
+ *out_len = dig_info_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, ret = 0;
+ size_t encoded_len = 0;
+ unsigned char *tmps = NULL;
+ const unsigned char *encoded = NULL;
+
+#ifndef FIPS_MODE
+ if (rsa->meth->rsa_sign != NULL)
+ return rsa->meth->rsa_sign(type, m, m_len, sigret, siglen, rsa);
+#endif /* FIPS_MODE */
+
+ /* 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_PKCS1_PADDING_SIZE > (size_t)RSA_size(rsa)) {
+ RSAerr(RSA_F_RSA_SIGN, RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
+ goto err;
+ }
+ encrypt_len = RSA_private_encrypt((int)encoded_len, encoded, sigret, rsa,
+ RSA_PKCS1_PADDING);
+ if (encrypt_len <= 0)
+ goto err;
+
+ *siglen = encrypt_len;
+ ret = 1;
+