diff options
Diffstat (limited to 'src/libstrongswan/fips')
-rw-r--r-- | src/libstrongswan/fips/fips.c | 103 | ||||
-rw-r--r-- | src/libstrongswan/fips/fips.h | 47 | ||||
-rw-r--r-- | src/libstrongswan/fips/fips_canister_end.c | 173 | ||||
-rw-r--r-- | src/libstrongswan/fips/fips_canister_start.c | 174 | ||||
-rw-r--r-- | src/libstrongswan/fips/fips_signer.c | 63 |
5 files changed, 560 insertions, 0 deletions
diff --git a/src/libstrongswan/fips/fips.c b/src/libstrongswan/fips/fips.c new file mode 100644 index 000000000..aba292d81 --- /dev/null +++ b/src/libstrongswan/fips/fips.c @@ -0,0 +1,103 @@ +/** + * @file fips.c + * + * @brief Implementation of the libstrongswan integrity test. + * + */ + +/* + * Copyright (C) 2007 Bruno Krieg, Daniel Wydler + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include <stdio.h> + +#include <debug.h> +#include <crypto/signers/hmac_signer.h> +#include "fips.h" + +extern const u_char FIPS_rodata_start[]; +extern const u_char FIPS_rodata_end[]; +extern const void *FIPS_text_start(); +extern const void *FIPS_text_end(); + +/** + * Described in header + */ +bool fips_compute_hmac_signature(const char *key, char *signature) +{ + u_char *text_start = (u_char *)FIPS_text_start(); + u_char *text_end = (u_char *)FIPS_text_end(); + size_t text_len, rodata_len; + signer_t *signer; + + if (text_start > text_end) + { + DBG1(" TEXT start (%p) > TEXT end (%p", + text_start, text_end); + return FALSE; + } + text_len = text_end - text_start; + DBG1(" TEXT: %p + %6d = %p", + text_start, (int)text_len, text_end); + + if (FIPS_rodata_start > FIPS_rodata_end) + { + DBG1(" RODATA start (%p) > RODATA end (%p", + FIPS_rodata_start, FIPS_rodata_end); + return FALSE; + } + rodata_len = FIPS_rodata_end - FIPS_rodata_start; + DBG1(" RODATA: %p + %6d = %p", + FIPS_rodata_start, (int)rodata_len, FIPS_rodata_end); + + signer = (signer_t *)hmac_signer_create(HASH_SHA1, HASH_SIZE_SHA1); + if (signer == NULL) + { + DBG1(" SHA-1 HMAC signer could not be created"); + return FALSE; + } + else + { + chunk_t hmac_key = { key, strlen(key) }; + chunk_t text_chunk = { text_start, text_len }; + chunk_t rodata_chunk = { (u_char *)FIPS_rodata_start, rodata_len }; + chunk_t signature_chunk = chunk_empty; + + signer->set_key(signer, hmac_key); + signer->allocate_signature(signer, text_chunk, NULL); + signer->allocate_signature(signer, rodata_chunk, &signature_chunk); + signer->destroy(signer); + + sprintf(signature, "%#B", &signature_chunk); + DBG1(" SHA-1 HMAC key: %s", key); + DBG1(" SHA-1 HMAC sig: %s", signature); + free(signature_chunk.ptr); + return TRUE; + } +} + +/** + * Described in header + */ +bool fips_verify_hmac_signature(const char *key, + const char *signature) +{ + char current_signature[BUF_LEN]; + + if (!fips_compute_hmac_signature(key, current_signature)) + { + return FALSE; + } + return streq(signature, current_signature); +} diff --git a/src/libstrongswan/fips/fips.h b/src/libstrongswan/fips/fips.h new file mode 100644 index 000000000..decf73bfd --- /dev/null +++ b/src/libstrongswan/fips/fips.h @@ -0,0 +1,47 @@ +/** + * @file fips.h + * + * @brief Interface of the libstrongswan integrity test + * + * @ingroup fips + */ + +/* + * Copyright (C) 2007 Bruno Krieg, Daniel Wydler + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#ifndef FIPS_H_ +#define FIPS_H_ + +#include <library.h> + +/** + * @brief compute HMAC signature over RODATA and TEXT sections of libstrongswan + * + * @param key key used for HMAC signature in ASCII string format + * @param signature HMAC signature in HEX string format + * @return TRUE if HMAC signature computation was successful + */ +bool fips_compute_hmac_signature(const char *key, char *signature); + +/** + * @brief verify HMAC signature over RODATA and TEXT sections of libstrongswan + * + * @param key key used for HMAC signature in ASCII string format + * @param signature signature value from fips_signature.h in HEX string format + * @return TRUE if signatures agree + */ +bool fips_verify_hmac_signature(const char *key, const char *signature); + +#endif /*FIPS_H_*/ diff --git a/src/libstrongswan/fips/fips_canister_end.c b/src/libstrongswan/fips/fips_canister_end.c new file mode 100644 index 000000000..46d41a664 --- /dev/null +++ b/src/libstrongswan/fips/fips_canister_end.c @@ -0,0 +1,173 @@ +/** + * @file fips_canister_end.c + * + * @brief Marks the end of TEXT and RODATA. + * + */ + +/* ==================================================================== + * Copyright (c) 2005 The OpenSSL Project. Rights for redistribution + * and usage in source and binary forms are granted according to the + * OpenSSL license. + */ + +#include <stdio.h> +#if defined(__DECC) +# include <c_asm.h> +# pragma __nostandard +#endif + +#if !defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION) +# if (defined(__sun) && (defined(__sparc) || defined(__sparcv9))) || \ + (defined(__sgi) && (defined(__mips) || defined(mips))) || \ + (defined(__osf__) && defined(__alpha)) || \ + (defined(__linux) && (defined(__arm) || defined(__arm__))) || \ + (defined(__i386) || defined(__i386__)) || \ + (defined(__x86_64) || defined(__x86_64__)) || \ + (defined(vax) || defined(__vax__)) +# define POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION +# endif +#endif + +#define FIPS_ref_point FIPS_text_end +/* Some compilers put string literals into a separate segment. As we + * are mostly interested to hash AES tables in .rodata, we declare + * reference points accordingly. In case you wonder, the values are + * big-endian encoded variable names, just to prevent these arrays + * from being merged by linker. */ +const unsigned int FIPS_rodata_end[]= + { 0x46495053, 0x5f726f64, 0x6174615f, 0x656e645b }; + + +/* + * I declare reference function as static in order to avoid certain + * pitfalls in -dynamic linker behaviour... + */ +static void *instruction_pointer(void) +{ + void *ret = NULL; + +/* These are ABI-neutral CPU-specific snippets. ABI-neutrality means + * that they are designed to work under any OS running on particular + * CPU, which is why you don't find any #ifdef THIS_OR_THAT_OS in + * this function. */ +#if defined(INSTRUCTION_POINTER_IMPLEMENTED) + INSTRUCTION_POINTER_IMPLEMENTED(ret); +#elif defined(__GNUC__) && __GNUC__>=2 +# if defined(__alpha) || defined(__alpha__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "br %0,1f\n1:" : "=r"(ret) ); +# elif defined(__i386) || defined(__i386__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "call 1f\n1: popl %0" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* align for better performance */ +# elif defined(__ia64) || defined(__ia64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "mov %0=ip" : "=r"(ret) ); +# elif defined(__hppa) || defined(__hppa__) || defined(__pa_risc) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "blr %%r0,%0\n\tnop" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* mask privilege level */ +# elif defined(__mips) || defined(__mips__) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "move %1,$31\n\t" /* save ra */ + "bal .+8; nop\n\t" + "move %0,$31\n\t" + "move $31,%1" /* restore ra */ + : "=r"(ret),"=r"(scratch) ); +# elif defined(__ppc__) || defined(__powerpc) || defined(__powerpc__) || \ + defined(__POWERPC__) || defined(_POWER) || defined(__PPC__) || \ + defined(__PPC64__) || defined(__powerpc64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "mfspr %1,8\n\t" /* save lr */ + "bl .+4\n\t" + "mfspr %0,8\n\t" /* mflr ret */ + "mtspr 8,%1" /* restore lr */ + : "=r"(ret),"=r"(scratch) ); +# elif defined(__sparc) || defined(__sparc__) || defined(__sparcv9) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "mov %%o7,%1\n\t" + "call .+8; nop\n\t" + "mov %%o7,%0\n\t" + "mov %1,%%o7" + : "=r"(ret),"=r"(scratch) ); +# elif defined(__x86_64) || defined(__x86_64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "leaq 0(%%rip),%0" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* align for better performance */ +# endif +#elif defined(__DECC) && defined(__alpha) +# define INSTRUCTION_POINTER_IMPLEMENTED + ret = (void *)(size_t)asm("br %v0,1f\n1:"); +#elif defined(_MSC_VER) && defined(_M_IX86) +# undef INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + _asm { + call self + self: pop eax + mov scratch,eax + } + ret = (void *)((size_t)scratch&~3UL); +#endif + return ret; +} + +/* + * This function returns pointer to an instruction in the vicinity of + * its entry point, but not outside this object module. This guarantees + * that sequestered code is covered... + */ +void *FIPS_ref_point() +{ +#if defined(INSTRUCTION_POINTER_IMPLEMENTED) + return instruction_pointer(); +/* Below we essentially cover vendor compilers which do not support + * inline assembler... */ +#elif defined(_AIX) + struct { void *ip,*gp,*env; } *p = (void *)instruction_pointer; + return p->ip; +#elif defined(_HPUX_SOURCE) +# if defined(__hppa) || defined(__hppa__) + struct { void *i[4]; } *p = (void *)FIPS_ref_point; + + if (sizeof(p) == 8) /* 64-bit */ + return p->i[2]; + else if ((size_t)p & 2) + { p = (void *)((size_t)p&~3UL); + return p->i[0]; + } + else + return (void *)p; +# elif defined(__ia64) || defined(__ia64__) + struct { unsigned long long ip,gp; } *p=(void *)instruction_pointer; + return (void *)(size_t)p->ip; +# endif +#elif (defined(__VMS) || defined(VMS)) && !(defined(vax) || defined(__vax__)) + /* applies to both alpha and ia64 */ + struct { unsigned __int64 opaque,ip; } *p=(void *)instruction_pointer; + return (void *)(size_t)p->ip; +#elif defined(__VOS__) + /* applies to both pa-risc and ia32 */ + struct { void *dp,*ip,*gp; } *p = (void *)instruction_pointer; + return p->ip; +#elif defined(_WIN32) +# if defined(_WIN64) && defined(_M_IA64) + struct { void *ip,*gp; } *p = (void *)FIPS_ref_point; + return p->ip; +# else + return (void *)FIPS_ref_point; +# endif +/* + * In case you wonder why there is no #ifdef __linux. All Linux targets + * are GCC-based and therefore are covered by instruction_pointer above + * [well, some are covered by by the one below]... + */ +#elif defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION) + return (void *)instruction_pointer; +#else + return NULL; +#endif +} diff --git a/src/libstrongswan/fips/fips_canister_start.c b/src/libstrongswan/fips/fips_canister_start.c new file mode 100644 index 000000000..eaf2571f8 --- /dev/null +++ b/src/libstrongswan/fips/fips_canister_start.c @@ -0,0 +1,174 @@ +/** + * @file fips_canister_start.c + * + * @brief Marks the start of TEXT and RODATA. + * + */ + +/* ==================================================================== + * Copyright (c) 2005 The OpenSSL Project. Rights for redistribution + * and usage in source and binary forms are granted according to the + * OpenSSL license. + */ + +#include <stdio.h> +#if defined(__DECC) +# include <c_asm.h> +# pragma __nostandard +#endif + +#if !defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION) +# if (defined(__sun) && (defined(__sparc) || defined(__sparcv9))) || \ + (defined(__sgi) && (defined(__mips) || defined(mips))) || \ + (defined(__osf__) && defined(__alpha)) || \ + (defined(__linux) && (defined(__arm) || defined(__arm__))) || \ + (defined(__i386) || defined(__i386__)) || \ + (defined(__x86_64) || defined(__x86_64__)) || \ + (defined(vax) || defined(__vax__)) +# define POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION +# endif +#endif + + +#define FIPS_ref_point FIPS_text_start +/* Some compilers put string literals into a separate segment. As we + * are mostly interested to hash AES tables in .rodata, we declare + * reference points accordingly. In case you wonder, the values are + * big-endian encoded variable names, just to prevent these arrays + * from being merged by linker. */ +const unsigned int FIPS_rodata_start[]= + { 0x46495053, 0x5f726f64, 0x6174615f, 0x73746172 }; + + +/* + * I declare reference function as static in order to avoid certain + * pitfalls in -dynamic linker behaviour... + */ +static void *instruction_pointer(void) +{ + void *ret = NULL; + +/* These are ABI-neutral CPU-specific snippets. ABI-neutrality means + * that they are designed to work under any OS running on particular + * CPU, which is why you don't find any #ifdef THIS_OR_THAT_OS in + * this function. */ +#if defined(INSTRUCTION_POINTER_IMPLEMENTED) + INSTRUCTION_POINTER_IMPLEMENTED(ret); +#elif defined(__GNUC__) && __GNUC__>=2 +# if defined(__alpha) || defined(__alpha__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "br %0,1f\n1:" : "=r"(ret) ); +# elif defined(__i386) || defined(__i386__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "call 1f\n1: popl %0" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* align for better performance */ +# elif defined(__ia64) || defined(__ia64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "mov %0=ip" : "=r"(ret) ); +# elif defined(__hppa) || defined(__hppa__) || defined(__pa_risc) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "blr %%r0,%0\n\tnop" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* mask privilege level */ +# elif defined(__mips) || defined(__mips__) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "move %1,$31\n\t" /* save ra */ + "bal .+8; nop\n\t" + "move %0,$31\n\t" + "move $31,%1" /* restore ra */ + : "=r"(ret),"=r"(scratch) ); +# elif defined(__ppc__) || defined(__powerpc) || defined(__powerpc__) || \ + defined(__POWERPC__) || defined(_POWER) || defined(__PPC__) || \ + defined(__PPC64__) || defined(__powerpc64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "mfspr %1,8\n\t" /* save lr */ + "bl .+4\n\t" + "mfspr %0,8\n\t" /* mflr ret */ + "mtspr 8,%1" /* restore lr */ + : "=r"(ret),"=r"(scratch) ); +# elif defined(__sparc) || defined(__sparc__) || defined(__sparcv9) +# define INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + __asm __volatile ( "mov %%o7,%1\n\t" + "call .+8; nop\n\t" + "mov %%o7,%0\n\t" + "mov %1,%%o7" + : "=r"(ret),"=r"(scratch) ); +# elif defined(__x86_64) || defined(__x86_64__) +# define INSTRUCTION_POINTER_IMPLEMENTED + __asm __volatile ( "leaq 0(%%rip),%0" : "=r"(ret) ); + ret = (void *)((size_t)ret&~3UL); /* align for better performance */ +# endif +#elif defined(__DECC) && defined(__alpha) +# define INSTRUCTION_POINTER_IMPLEMENTED + ret = (void *)(size_t)asm("br %v0,1f\n1:"); +#elif defined(_MSC_VER) && defined(_M_IX86) +# undef INSTRUCTION_POINTER_IMPLEMENTED + void *scratch; + _asm { + call self + self: pop eax + mov scratch,eax + } + ret = (void *)((size_t)scratch&~3UL); +#endif + return ret; +} + +/* + * This function returns pointer to an instruction in the vicinity of + * its entry point, but not outside this object module. This guarantees + * that sequestered code is covered... + */ +void *FIPS_ref_point() +{ +#if defined(INSTRUCTION_POINTER_IMPLEMENTED) + return instruction_pointer(); +/* Below we essentially cover vendor compilers which do not support + * inline assembler... */ +#elif defined(_AIX) + struct { void *ip,*gp,*env; } *p = (void *)instruction_pointer; + return p->ip; +#elif defined(_HPUX_SOURCE) +# if defined(__hppa) || defined(__hppa__) + struct { void *i[4]; } *p = (void *)FIPS_ref_point; + + if (sizeof(p) == 8) /* 64-bit */ + return p->i[2]; + else if ((size_t)p & 2) + { p = (void *)((size_t)p&~3UL); + return p->i[0]; + } + else + return (void *)p; +# elif defined(__ia64) || defined(__ia64__) + struct { unsigned long long ip,gp; } *p=(void *)instruction_pointer; + return (void *)(size_t)p->ip; +# endif +#elif (defined(__VMS) || defined(VMS)) && !(defined(vax) || defined(__vax__)) + /* applies to both alpha and ia64 */ + struct { unsigned __int64 opaque,ip; } *p=(void *)instruction_pointer; + return (void *)(size_t)p->ip; +#elif defined(__VOS__) + /* applies to both pa-risc and ia32 */ + struct { void *dp,*ip,*gp; } *p = (void *)instruction_pointer; + return p->ip; +#elif defined(_WIN32) +# if defined(_WIN64) && defined(_M_IA64) + struct { void *ip,*gp; } *p = (void *)FIPS_ref_point; + return p->ip; +# else + return (void *)FIPS_ref_point; +# endif +/* + * In case you wonder why there is no #ifdef __linux. All Linux targets + * are GCC-based and therefore are covered by instruction_pointer above + * [well, some are covered by by the one below]... + */ +#elif defined(POINTER_TO_FUNCTION_IS_POINTER_TO_1ST_INSTRUCTION) + return (void *)instruction_pointer; +#else + return NULL; +#endif +} diff --git a/src/libstrongswan/fips/fips_signer.c b/src/libstrongswan/fips/fips_signer.c new file mode 100644 index 000000000..7fb61d5b7 --- /dev/null +++ b/src/libstrongswan/fips/fips_signer.c @@ -0,0 +1,63 @@ +/** + * @file fips_signer.c + * + * @brief Computes a HMAC signature and stores it in fips_signature.h. + * + */ + +/* + * Copyright (C) 2007 Bruno Krieg, Daniel Wydler + * Hochschule fuer Technik Rapperswil, Switzerland + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include <stdio.h> + +#include <crypto/hashers/hasher.h> +#include "fips.h" + +int main(int argc, char* argv[]) +{ + FILE *f; + char *hmac_key = "strongSwan Version " VERSION; + char hmac_signature[BUF_LEN]; + + if (!fips_compute_hmac_signature(hmac_key, hmac_signature)) + { + exit(1); + } + + /** + * write computed HMAC signature to fips_signature.h + */ + f = fopen("fips_signature.h", "wt"); + + if (f == NULL) + { + exit(1); + } + fprintf(f, "/* SHA-1 HMAC signature computed over TEXT and RODATA of libstrongswan\n"); + fprintf(f, " *\n"); + fprintf(f, " * This file has been automatically generated by fips_signer\n"); + fprintf(f, " * Do not edit manually!\n"); + fprintf(f, " */\n"); + fprintf(f, "\n"); + fprintf(f, "#ifndef FIPS_SIGNATURE_H_\n"); + fprintf(f, "#define FIPS_SIGNATURE_H_\n"); + fprintf(f, "\n"); + fprintf(f, "const char *hmac_key = \"%s\";\n", hmac_key); + fprintf(f, "const char *hmac_signature = \"%s\";\n", hmac_signature); + fprintf(f, "\n"); + fprintf(f, "#endif /* FIPS_SIGNATURE_H_ */\n"); + fclose(f); + exit(0); +} |