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PR: 2704

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Submitted by: Peter Sylvester <peter.sylvester@edelweb.fr>

Fix srp extension.
This commit is contained in:
Dr. Stephen Henson 2012-02-10 20:08:49 +00:00
parent 26c6857a59
commit c489ea7d01
2 changed files with 35 additions and 19 deletions
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2
ssl/s3_lib.c
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@ -3589,7 +3589,7 @@ long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
ctx->srp_ctx.login = NULL;
if (parg == NULL)
break;
if (strlen((char *)parg) > 254)
if (strlen((const char *)parg) > 255 || strlen((const char *)parg) < 1)
{
SSLerr(SSL_F_SSL3_CTX_CTRL, SSL_R_INVALID_SRP_USERNAME);
return 0;

52
ssl/t1_lib.c
View file

@ -432,25 +432,29 @@ unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned cha
}
#ifndef OPENSSL_NO_SRP
#define MIN(x,y) (((x)<(y))?(x):(y))
/* we add SRP username the first time only if we have one! */
/* Add SRP username if there is one */
if (s->srp_ctx.login != NULL)
{/* Add TLS extension SRP username to the Client Hello message */
int login_len = MIN(strlen(s->srp_ctx.login) + 1, 255);
long lenmax;
{ /* Add TLS extension SRP username to the Client Hello message */
if ((lenmax = limit - ret - 5) < 0) return NULL;
if (login_len > lenmax) return NULL;
if (login_len > 255)
int login_len = strlen(s->srp_ctx.login);
if (login_len > 255 || login_len == 0)
{
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
return NULL;
}
}
/* check for enough space.
4 for the srp type type and entension length
1 for the srp user identity
+ srp user identity length
*/
if ((limit - ret - 5 - login_len) < 0) return NULL;
/* fill in the extension */
s2n(TLSEXT_TYPE_srp,ret);
s2n(login_len+1,ret);
(*ret++) = (unsigned char) MIN(strlen(s->srp_ctx.login), 254);
memcpy(ret, s->srp_ctx.login, MIN(strlen(s->srp_ctx.login), 254));
(*ret++) = (unsigned char) login_len;
memcpy(ret, s->srp_ctx.login, login_len);
ret+=login_len;
}
#endif
@ -1007,13 +1011,25 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
#ifndef OPENSSL_NO_SRP
else if (type == TLSEXT_TYPE_srp)
{
if (size > 0)
if (size <= 0 || ((len = data[0])) != (size -1))
{
len = data[0];
if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
return -1;
memcpy(s->srp_ctx.login, &data[1], len);
s->srp_ctx.login[len]='\0';
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if (s->srp_ctx.login != NULL)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
return -1;
memcpy(s->srp_ctx.login, &data[1], len);
s->srp_ctx.login[len]='\0';
if (strlen(s->srp_ctx.login) != len)
{
*al = SSL_AD_DECODE_ERROR;
return 0;
}
}
#endif