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173
openssl-1.0.2f/demos/tunala/cb.c
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173
openssl-1.0.2f/demos/tunala/cb.c
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#include "tunala.h"
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#ifndef NO_OPENSSL
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/* For callbacks generating output, here are their file-descriptors. */
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static FILE *fp_cb_ssl_info = NULL;
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static FILE *fp_cb_ssl_verify = NULL;
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/*-
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* Output level:
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* 0 = nothing,
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* 1 = minimal, just errors,
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* 2 = minimal, all steps,
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* 3 = detail, all steps */
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static unsigned int cb_ssl_verify_level = 1;
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/* Other static rubbish (to mirror s_cb.c where required) */
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static int int_verify_depth = 10;
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/*
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* This function is largely borrowed from the one used in OpenSSL's
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* "s_client" and "s_server" utilities.
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*/
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void cb_ssl_info(const SSL *s, int where, int ret)
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{
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const char *str1, *str2;
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int w;
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if (!fp_cb_ssl_info)
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return;
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w = where & ~SSL_ST_MASK;
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str1 = (w & SSL_ST_CONNECT ? "SSL_connect" : (w & SSL_ST_ACCEPT ?
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"SSL_accept" :
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"undefined")), str2 =
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SSL_state_string_long(s);
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if (where & SSL_CB_LOOP)
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fprintf(fp_cb_ssl_info, "(%s) %s\n", str1, str2);
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else if (where & SSL_CB_EXIT) {
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if (ret == 0)
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fprintf(fp_cb_ssl_info, "(%s) failed in %s\n", str1, str2);
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/*
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* In a non-blocking model, we get a few of these "error"s simply
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* because we're calling "reads" and "writes" on the state-machine
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* that are virtual NOPs simply to avoid wasting the time seeing if
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* we *should* call them. Removing this case makes the "-out_state"
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* output a lot easier on the eye.
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*/
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# if 0
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else if (ret < 0)
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fprintf(fp_cb_ssl_info, "%s:error in %s\n", str1, str2);
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# endif
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}
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}
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void cb_ssl_info_set_output(FILE *fp)
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{
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fp_cb_ssl_info = fp;
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}
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static const char *int_reason_no_issuer =
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"X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT";
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static const char *int_reason_not_yet = "X509_V_ERR_CERT_NOT_YET_VALID";
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static const char *int_reason_before =
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"X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD";
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static const char *int_reason_expired = "X509_V_ERR_CERT_HAS_EXPIRED";
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static const char *int_reason_after =
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"X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD";
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/* Stolen wholesale from apps/s_cb.c :-) And since then, mutilated ... */
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int cb_ssl_verify(int ok, X509_STORE_CTX *ctx)
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{
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char buf1[256]; /* Used for the subject name */
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char buf2[256]; /* Used for the issuer name */
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const char *reason = NULL; /* Error reason (if any) */
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X509 *err_cert;
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int err, depth;
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if (!fp_cb_ssl_verify || (cb_ssl_verify_level == 0))
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return ok;
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err_cert = X509_STORE_CTX_get_current_cert(ctx);
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err = X509_STORE_CTX_get_error(ctx);
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depth = X509_STORE_CTX_get_error_depth(ctx);
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buf1[0] = buf2[0] = '\0';
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/* Fill buf1 */
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X509_NAME_oneline(X509_get_subject_name(err_cert), buf1, 256);
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/* Fill buf2 */
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X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf2, 256);
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switch (ctx->error) {
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case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
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reason = int_reason_no_issuer;
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break;
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case X509_V_ERR_CERT_NOT_YET_VALID:
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reason = int_reason_not_yet;
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break;
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case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
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reason = int_reason_before;
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break;
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case X509_V_ERR_CERT_HAS_EXPIRED:
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reason = int_reason_expired;
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break;
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case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
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reason = int_reason_after;
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break;
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}
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if ((cb_ssl_verify_level == 1) && ok)
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return ok;
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fprintf(fp_cb_ssl_verify, "chain-depth=%d, ", depth);
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if (reason)
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fprintf(fp_cb_ssl_verify, "error=%s\n", reason);
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else
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fprintf(fp_cb_ssl_verify, "error=%d\n", err);
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if (cb_ssl_verify_level < 3)
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return ok;
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fprintf(fp_cb_ssl_verify, "--> subject = %s\n", buf1);
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fprintf(fp_cb_ssl_verify, "--> issuer = %s\n", buf2);
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if (!ok)
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fprintf(fp_cb_ssl_verify, "--> verify error:num=%d:%s\n", err,
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X509_verify_cert_error_string(err));
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fprintf(fp_cb_ssl_verify, "--> verify return:%d\n", ok);
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return ok;
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}
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void cb_ssl_verify_set_output(FILE *fp)
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{
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fp_cb_ssl_verify = fp;
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}
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void cb_ssl_verify_set_depth(unsigned int verify_depth)
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{
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int_verify_depth = verify_depth;
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}
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void cb_ssl_verify_set_level(unsigned int level)
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{
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if (level < 4)
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cb_ssl_verify_level = level;
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}
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RSA *cb_generate_tmp_rsa(SSL *s, int is_export, int keylength)
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{
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/*
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* TODO: Perhaps make it so our global key can be generated on-the-fly
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* after certain intervals?
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*/
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static RSA *rsa_tmp = NULL;
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BIGNUM *bn = NULL;
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int ok = 1;
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if (!rsa_tmp) {
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ok = 0;
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if (!(bn = BN_new()))
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goto end;
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if (!BN_set_word(bn, RSA_F4))
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goto end;
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if (!(rsa_tmp = RSA_new()))
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goto end;
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if (!RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL))
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goto end;
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ok = 1;
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}
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end:
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if (bn)
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BN_free(bn);
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if (!ok) {
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RSA_free(rsa_tmp);
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rsa_tmp = NULL;
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}
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return rsa_tmp;
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}
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#endif /* !defined(NO_OPENSSL) */
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