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Fix a lot of warnings and (what seems to be) two errors...

    -mi

--- ias.h   2006-03-13 06:45:20.000000000 -0500
+++ ias.h   2008-04-29 10:03:02.000000000 -0400
@@ -6,13 +6,6 @@
  */
 
-/* Macros */
-
-#define i2d_pkcs7_issuer_and_subject_bio(bp, ias) \
-   ASN1_i2d_bio(i2d_pkcs7_issuer_and_subject, bp, (unsigned char *)ias)
-#define i2d_PKCS7_ISSUER_AND_SERIAL_bio(bp, ias)  \
-   ASN1_i2d_bio(i2d_PKCS7_ISSUER_AND_SERIAL, bp, (unsigned char *)ias)
-
 /* Routines */
-int i2d_pkcs7_issuer_and_subject(pkcs7_issuer_and_subject *, unsigned char **);
+int i2d_pkcs7_issuer_and_subject(void *, unsigned char **);
 pkcs7_issuer_and_subject *
 d2i_pkcs7_issuer_and_subject(pkcs7_issuer_and_subject **, unsigned char **,
--- net.c   2007-12-27 01:08:39.000000000 -0500
+++ net.c   2008-04-29 10:03:02.000000000 -0400
@@ -151,13 +151,13 @@
 
 /* URL-encode the input and return back encoded string */
-char * url_encode(char *s, size_t n) {
+char * url_encode(const char *s, size_t n) {
    char    *r;
    size_t  len;
-   int     i;
+   size_t  i;
    char    ch[2];
 
    /* Allocate 2 times bigger space than the original string */
    len = 2 * n;
-   r = (char *)malloc(len);    
+   r = malloc(len);    
    if (r == NULL) {
        return NULL;
--- pkcs7.c 2006-03-13 06:45:21.000000000 -0500
+++ pkcs7.c 2008-04-29 10:03:02.000000000 -0400
@@ -10,4 +10,18 @@
 #include "ias.h"
 
+static int
+pkcs7_translator(void *p, unsigned char **out)
+{
+   return i2d_PKCS7_ISSUER_AND_SERIAL(p, out);
+}
+#define i2d_pkcs7_issuer_and_subject_bio(bp, ias) \
+   ASN1_i2d_bio(i2d_pkcs7_issuer_and_subject, bp, (unsigned char *)ias)
+#define i2d_PKCS7_ISSUER_AND_SERIAL_bio(bp, ias)  \
+   ASN1_i2d_bio(pkcs7_translator, bp, (unsigned char *)ias)
+
+static int add_attribute_string(STACK_OF(X509_ATTRIBUTE) *, int,
+    const char *);
+static int add_attribute_octet(STACK_OF(X509_ATTRIBUTE) *, int,
+    const char *, int);
 /*
  * Wrap data in PKCS#7 envelopes and base64-encode the result.
@@ -64,5 +78,5 @@
                exit (SCEP_PKISTATUS_P7);
            }
-           BIO_flush(databio);
+           (void)BIO_flush(databio);
            BIO_set_flags(databio, BIO_FLAGS_MEM_RDONLY); 
            break;
@@ -90,5 +104,5 @@
                exit (SCEP_PKISTATUS_P7);
            }
-           BIO_flush(databio);
+           (void)BIO_flush(databio);
            BIO_set_flags(databio, BIO_FLAGS_MEM_RDONLY); 
            break;
@@ -100,5 +114,5 @@
            /* Signer cert */
            signercert = localcert;
-           signercert = rsa;
+           signerkey = rsa;
 
            /* Read data in memory bio */
@@ -111,5 +125,5 @@
                exit (SCEP_PKISTATUS_P7);
            }
-           BIO_flush(databio);
+           (void)BIO_flush(databio);
            BIO_set_flags(databio, BIO_FLAGS_MEM_RDONLY); 
            break;
@@ -121,5 +135,5 @@
            /* Signer cert */
            signercert = localcert;
-           signercert = rsa;
+           signerkey = rsa;
 
            /* Read data in memory bio */
@@ -132,5 +146,5 @@
                exit (SCEP_PKISTATUS_P7);
            }
-           BIO_flush(databio);
+           (void)BIO_flush(databio);
            BIO_set_flags(databio, BIO_FLAGS_MEM_RDONLY); 
            break;
@@ -195,5 +209,5 @@
        exit (SCEP_PKISTATUS_P7);
    }
-   BIO_flush(memorybio);
+   (void)BIO_flush(memorybio);
    BIO_set_flags(memorybio, BIO_FLAGS_MEM_RDONLY); 
    len = BIO_get_mem_data(memorybio, &buffer);
@@ -298,5 +312,5 @@
    /* Copy PKCS#7 */
    i2d_PKCS7_bio(outbio, s->request_p7);
-   BIO_flush(outbio);
+   (void)BIO_flush(outbio);
    BIO_set_flags(memorybio, BIO_FLAGS_MEM_RDONLY);
    s->request_len = BIO_get_mem_data(memorybio, &s->request_payload);
@@ -370,5 +384,5 @@
        BIO_write(outbio, buffer, bytes);
    }
-   BIO_flush(outbio);
+   (void)BIO_flush(outbio);
    if (v_flag)
        printf("%s: PKCS#7 contains %d bytes of enveloped data\n",
@@ -584,5 +598,5 @@
        exit (SCEP_PKISTATUS_P7);
    }
-   BIO_flush(outbio);
+   (void)BIO_flush(outbio);
 
    /* Write decrypted data */
@@ -599,6 +613,6 @@
 
 /* Add signed attributes */
-int
-add_attribute_string(STACK_OF(X509_ATTRIBUTE) *attrs, int nid, char *buffer) {
+static int
+add_attribute_string(STACK_OF(X509_ATTRIBUTE) *attrs, int nid, const char *buffer) {
    ASN1_STRING     *asn1_string = NULL;
    X509_ATTRIBUTE  *x509_a;
@@ -623,6 +637,6 @@
 
 }
-int
-add_attribute_octet(STACK_OF(X509_ATTRIBUTE) *attrs, int nid, char *buffer,
+static int
+add_attribute_octet(STACK_OF(X509_ATTRIBUTE) *attrs, int nid, const char *buffer,
        int len) {
    ASN1_STRING     *asn1_string = NULL;
--- ias.c   2006-03-13 06:45:20.000000000 -0500
+++ ias.c   2008-04-29 10:03:02.000000000 -0400
@@ -15,7 +15,8 @@
 #include "ias.h"
 
-int i2d_pkcs7_issuer_and_subject(pkcs7_issuer_and_subject *a,
+int i2d_pkcs7_issuer_and_subject(void *pv,
         unsigned char **pp) {
 
+   pkcs7_issuer_and_subject *a = pv;
    M_ASN1_I2D_vars(a);
    M_ASN1_I2D_len(a->issuer,i2d_X509_NAME);
--- sceputils.c 2006-03-13 06:45:22.000000000 -0500
+++ sceputils.c 2008-05-03 12:35:42.000000000 -0400
@@ -48,5 +48,5 @@
  */
 int new_selfsigned(struct scep *s) {
-   unsigned char        *ptr;
+   const unsigned char  *ptr;
    X509             *cert;
    X509_NAME        *subject;
@@ -99,6 +99,11 @@
    }
    /* Get serial no from transaction id */
-   ptr = (unsigned char *)s->transaction_id;
-   if (!(serial = c2i_ASN1_INTEGER(NULL, &ptr, 32))) {
+   ptr = (const unsigned char *)s->transaction_id;
+#if OPENSSL_VERSION_NUMBER < 0x0090800fL
+#  define CAST_CRUTCH  (unsigned char **)
+#else
+#  define CAST_CRUTCH
+#endif
+   if (!(serial = c2i_ASN1_INTEGER(NULL, CAST_CRUTCH&ptr, 32))) {
        fprintf(stderr, "%s: error converting serial\n", pname);
        ERR_print_errors_fp(stderr);
@@ -231,5 +236,5 @@
    
    /* Assign space for ASCII presentation of the digest */
-   str = (unsigned char *)malloc(2 * MD5_DIGEST_LENGTH + 1);
+   str = malloc(2 * MD5_DIGEST_LENGTH + 1); /* XXX this is never freed */
    ret = str;
 
@@ -246,5 +251,5 @@
    /* Copy as ASCII string and return: */
    for (c = 0; c < MD5_DIGEST_LENGTH; c++, str += 2) {
-       sprintf((char *)str, "%02X", md[c]);
+       sprintf(str, "%02X", md[c]);
 
    }
@@ -252,4 +257,2 @@
    return(ret);
 }
-
-
--- sscep.h 2007-12-27 01:15:38.000000000 -0500
+++ sscep.h 2008-04-29 10:03:02.000000000 -0400
@@ -139,7 +139,7 @@
 
 /* Fingerprint, signing and encryption algorithms */
-EVP_MD *fp_alg;
-EVP_MD *sig_alg;
-EVP_CIPHER *enc_alg;
+const EVP_MD *fp_alg;
+const EVP_MD *sig_alg;
+const EVP_CIPHER *enc_alg;
 
 /* OpenSSL OID handles */
@@ -188,5 +188,5 @@
    /* SCEP message types */
    int request_type;
-   char *request_type_str;
+   const char *request_type_str;
    int reply_type;
    char *reply_type_str;
@@ -199,5 +199,5 @@
 
    /* SCEP transaction attributes */
-   char *transaction_id;
+   const char *transaction_id;
    unsigned char *sender_nonce;
    int sender_nonce_len;
@@ -237,7 +237,4 @@
 int send_msg (struct http_reply *, char *, char *, int, int);
 
-/* Catch SIGALRM */
-void catchalarm (int);
-
 /* Get config file parameter */
 char *get_string (char *);
@@ -291,10 +288,4 @@
 int pkcs7_unwrap(struct scep *);
 
-/* Add signed string attribute */
-int add_attribute_string(STACK_OF(X509_ATTRIBUTE) *, int, char *);
-
-/* Add signed octet attribute */
-int add_attribute_octet(STACK_OF(X509_ATTRIBUTE) *, int, char *, int);
-
 /* Find signed attributes */
 int get_signed_attribute(STACK_OF(X509_ATTRIBUTE) *, int, int, char **);
@@ -302,5 +293,5 @@
 
 /* URL-endcode */
-char *url_encode (char *, size_t);
+char *url_encode (const char *, size_t);
 
 /* End of Functions */
--- cmd.h   2006-03-13 06:45:14.000000000 -0500
+++ cmd.h   2008-04-29 10:03:02.000000000 -0400
@@ -45,5 +45,5 @@
 
 /* CA identifier */
-char *i_char;
+const char *i_char;
 int i_flag;
 
--- sscep.c 2007-12-27 01:08:39.000000000 -0500
+++ sscep.c 2008-04-29 10:03:15.000000000 -0400
@@ -64,4 +64,10 @@
 } /* handle_serial */
 
+static void
+catchalarm(int signo __unused) {
+   fprintf(stderr, "%s: connection timed out\n", pname);
+   exit (SCEP_PKISTATUS_TIMEOUT);
+}
+
 int
 main(int argc, char **argv) {
@@ -349,11 +355,11 @@
    /* Check algorithms */
    if (!E_flag) {
-       enc_alg = (EVP_CIPHER *)EVP_des_cbc();
+       enc_alg = EVP_des_cbc();
    } else if (!strncmp(E_char, "blowfish", 8)) {
-       enc_alg = (EVP_CIPHER *)EVP_bf_cbc();
+       enc_alg = EVP_bf_cbc();
    } else if (!strncmp(E_char, "des", 3)) {
-       enc_alg = (EVP_CIPHER *)EVP_des_cbc();
+       enc_alg = EVP_des_cbc();
    } else if (!strncmp(E_char, "3des", 4)) {
-       enc_alg = (EVP_CIPHER *)EVP_des_ede3_cbc();
+       enc_alg = EVP_des_ede3_cbc();
    } else {
        fprintf(stderr, "%s: unsupported algorithm: %s\n",
@@ -362,9 +368,9 @@
    }
    if (!S_flag) {
-       sig_alg = (EVP_MD *)EVP_md5();
+       sig_alg = EVP_md5();
    } else if (!strncmp(S_char, "md5", 3)) {
-       sig_alg = (EVP_MD *)EVP_md5();
+       sig_alg = EVP_md5();
    } else if (!strncmp(S_char, "sha1", 4)) {
-       sig_alg = (EVP_MD *)EVP_sha1();
+       sig_alg = EVP_sha1();
    } else {
        fprintf(stderr, "%s: unsupported algorithm: %s\n",
@@ -374,9 +380,9 @@
    /* Fingerprint algorithm */
    if (!F_flag) {
-       fp_alg = (EVP_MD *)EVP_md5();
+       fp_alg = EVP_md5();
    } else if (!strncmp(F_char, "md5", 3)) {
-       fp_alg = (EVP_MD *)EVP_md5();
+       fp_alg = EVP_md5();
    } else if (!strncmp(F_char, "sha1", 4)) {
-       fp_alg = (EVP_MD *)EVP_sha1();
+       fp_alg = EVP_sha1();
    } else {
        fprintf(stderr, "%s: unsupported algorithm: %s\n",
@@ -778,8 +784,2 @@
    exit(0);
 }
-
-void
-catchalarm(int signo) {
-   fprintf(stderr, "%s: connection timed out\n", pname);
-   exit (SCEP_PKISTATUS_TIMEOUT);
-}