I have installed OpenSSL 9.7.g on a HP-UX B.11.0 A 9000/800 server (with Ansi
C). I know it's not the newest version of OpenSSL but I have installed this
version in a similar server 2 years ago and it worked fine...
The installation went ok, but I try to compile a simple C program (where I
generate a digital signature, so I only use the cryptographic library, nothing
of ssl), and I can't make my program to find these libraries:
This is how I compile:
cc -o firma +DD64 -I/usr/local/ssl/include -L/usr/local/ssl/lib -lcrypto firma.c
where:
+DD64 is to assure an 64 bit compilation
-L to indicate the path where I have libcrypto.a file
-lcrypto to indicate that I want to use the crytpographic library
But It seems that the compiler cannot find the libcrypto.a file because I have
errors like:
ld: Unsatisfied symbol "EVP_DigestInit_ex" in file firma.o
ld: Unsatisfied symbol "BIO_new_fp" in file firma.old: Unsatisfied symbol
"EVP_PKEY_size" in file firma.o... an so on (just errors like this ones)
Any clues of what I am missing??? Thanks in advance for your recommendations.
Silvia Pavón
If you need it, here's my program, so you see, It's simple (and I know it works
because it's working in the server I installed openssl 2 yearas ago):
#include <openssl/evp.h>#include <openssl/rsa.h>#include
<openssl/pem.h>#include <openssl/err.h>#include <openssl/bio.h>
#include <stdlib.h>
#define TAM_BUF 1024
int main(int argc, char **argv){
ERR_load_crypto_strings();
// Carga de llave en archivo en formato PEM // previamente abri la llave
en PKCS8 con linea de comando FILE *fp_key_pem; EVP_PKEY *clave_EVP;
printf("Iniciando lectura de llave en archivo\n"); if( (fp_key_pem =
fopen("key.pem","rb")) == NULL ){ ERR_print_errors_fp (stderr);
exit(1); } //if PEM_read_PrivateKey(fp_key_pem, &clave_EVP, NULL, NULL);
fclose(fp_key_pem);
printf("Llave cargada\n"); printf("Tamanio de llave es %d
bytes\n",EVP_PKEY_size(clave_EVP));
// Carga el archivo a firmar FILE *fp_ext;
if( (fp_ext = fopen("ale_cadena_original.xml","rb")) == NULL ){
perror("ERROR: Abriendo el archivo a firmar\n"); exit(1); }//if
// Comienza firma unsigned char *firma; int bytes_leidos;
unsigned int bytes_firma; EVP_MD_CTX ctx; char buf[TAM_BUF];
int err;
printf("Firmando...\n"); firma = (unsigned char *)
malloc(EVP_PKEY_size(clave_EVP));
EVP_SignInit_ex(&ctx, EVP_md5(), NULL); while (!feof(fp_ext)){
bytes_leidos = fread( (void *) buf, sizeof(char), TAM_BUF, fp_ext);
EVP_SignUpdate(&ctx, (void *) buf, bytes_leidos); }//while
bytes_firma = EVP_PKEY_size(clave_EVP); err = EVP_SignFinal(&ctx, firma,
&bytes_firma, clave_EVP); if (err != 1){ ERR_print_errors_fp(stderr);
exit (1); }//if
printf("Ya firme y tamano firma es %d %d\n",bytes_firma, strlen(firma));
// Conversion a base 64 BIO *bio; BIO *b64; FILE *fp_out;
if( (fp_out = fopen("firma_b64.txt","w")) == NULL ){ perror("ERROR:
Abriendo el archivo de salida\n"); exit(1); }//if
b64 = BIO_new(BIO_f_base64()); bio = BIO_new_fp(fp_out, BIO_NOCLOSE);
bio = BIO_push(b64, bio); BIO_write(bio, firma, bytes_firma);
BIO_flush(bio);
fclose(fp_out); printf("Liberando espacio utilizado\n");
BIO_free_all(bio); free(firma); EVP_PKEY_free(clave_EVP);
exit(0);
}//main
_________________________________________________________________
News, entertainment and everything you care about at Live.com. Get it now!
http://www.live.com/getstarted.aspx
