a3fcb19867
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2275 ec53bebd-3082-4978-b11e-865c3cabbd6b
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
#include "gssapi_locl.h"
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RCSID("$Id$");
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OM_uint32
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gssapi_krb5_verify_header(u_char **str,
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size_t total_len,
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u_char *type)
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{
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size_t len, len_len, mech_len, foo;
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int e;
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u_char *p = *str;
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if (*p++ != 0x60)
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return GSS_S_DEFECTIVE_TOKEN;
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e = der_get_length (p, total_len - 1, &len, &len_len);
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if (e || 1 + len_len + len != total_len)
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abort ();
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p += len_len;
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if (*p++ != 0x06)
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return GSS_S_DEFECTIVE_TOKEN;
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e = der_get_length (p, total_len - 1 - len_len - 1,
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&mech_len, &foo);
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if (e)
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abort ();
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p += foo;
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if (mech_len != GSS_KRB5_MECHANISM->length)
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return GSS_S_BAD_MECH;
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if (memcmp(p,
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GSS_KRB5_MECHANISM->elements,
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GSS_KRB5_MECHANISM->length) != 0)
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return GSS_S_BAD_MECH;
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p += mech_len;
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if (memcmp (p, type, 2) != 0)
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return GSS_S_DEFECTIVE_TOKEN;
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p += 2;
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*str = p;
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return GSS_S_COMPLETE;
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}
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/*
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* Remove the GSS-API wrapping from `in_token' giving `out_data.
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* Does not copy data, so just free `in_token'.
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*/
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OM_uint32
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gssapi_krb5_decapsulate(
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gss_buffer_t input_token_buffer,
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krb5_data *out_data,
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u_char *type
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)
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{
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u_char *p;
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OM_uint32 ret;
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p = input_token_buffer->value;
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ret = gssapi_krb5_verify_header(&p,
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input_token_buffer->length,
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type);
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if (ret)
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return ret;
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out_data->length = input_token_buffer->length -
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(p - (u_char *)input_token_buffer->value);
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out_data->data = p;
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return GSS_S_COMPLETE;
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}
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