crypto/rsa/rsa_x931g.c:156: error: BUFFER_OVERRUN_L3
  Offset: [3, +oo] (⇐ [0, +oo] + 3) Size: [0, 8388607] by call to `BN_X931_generate_Xpq`.
Showing all 22 steps of the trace


crypto/rsa/rsa_x931g.c:154:10: Call
152.   
153.       BN_CTX_start(ctx);
154.       Xp = BN_CTX_get(ctx);
                ^
155.       Xq = BN_CTX_get(ctx);
156.       if (!BN_X931_generate_Xpq(Xp, Xq, bits, ctx))

crypto/bn/bn_ctx.c:229:5: Call
  227.       }
  228.       /* OK, make sure the returned bignum is "zero" */
  229.       BN_zero(ret);
             ^
  230.       ctx->used++;
  231.       CTXDBG_RET(ctx, ret);

crypto/bn/bn_lib.c:463:1: Parameter `*a->d`
    461.   }
    462.   
    463. > int BN_set_word(BIGNUM *a, BN_ULONG w)
    464.   {
    465.       bn_check_top(a);

crypto/bn/bn_lib.c:466:9: Call
    464.   {
    465.       bn_check_top(a);
    466.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                   ^
    467.           return (0);
    468.       a->neg = 0;

crypto/bn/bn_lcl.h:676:1: Parameter `*a->d`
      674.   int bn_probable_prime_dh_coprime(BIGNUM *rnd, int bits, BN_CTX *ctx);
      675.   
      676. > static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)
      677.   {
      678.       if (bits > (INT_MAX - BN_BITS2 + 1))

crypto/rsa/rsa_x931g.c:156:10: Call
154.       Xp = BN_CTX_get(ctx);
155.       Xq = BN_CTX_get(ctx);
156.       if (!BN_X931_generate_Xpq(Xp, Xq, bits, ctx))
                ^
157.           goto error;
158.   

crypto/bn/bn_x931p.c:157:1: Parameter `*Xp->d`
  155.    */
  156.   
  157. > int BN_X931_generate_Xpq(BIGNUM *Xp, BIGNUM *Xq, int nbits, BN_CTX *ctx)
  158.   {
  159.       BIGNUM *t;

crypto/bn/bn_x931p.c:173:10: Call
  171.        * exceeded.
  172.        */
  173.       if (!BN_rand(Xp, nbits, BN_RAND_TOP_TWO, BN_RAND_BOTTOM_ANY))
                  ^
  174.           goto err;
  175.   

crypto/bn/bn_rand.c:93:1: Parameter `*rnd->d`
    91.   }
    92.   
    93. > int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
    94.   {
    95.       return bnrand(0, rnd, bits, top, bottom);

crypto/bn/bn_rand.c:95:12: Call
    93.   int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)
    94.   {
    95.       return bnrand(0, rnd, bits, top, bottom);
                     ^
    96.   }
    97.   

crypto/bn/bn_rand.c:17:1: Parameter `*rnd->d`
      15.   #include <openssl/sha.h>
      16.   
      17. > static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom)
      18.   {
      19.       unsigned char *buf = NULL;

crypto/bn/bn_rand.c:84:10: Call
      82.       if (bottom)                 /* set bottom bit if requested */
      83.           buf[bytes - 1] |= 1;
      84.       if (!BN_bin2bn(buf, bytes, rnd))
                     ^
      85.           goto err;
      86.       ret = 1;

crypto/bn/bn_lib.c:475:1: Parameter `*ret->d`
        473.   }
        474.   
        475. > BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)
        476.   {
        477.       unsigned int i, m;

crypto/bn/bn_lib.c:497:9: Call
        495.       i = ((n - 1) / BN_BYTES) + 1;
        496.       m = ((n - 1) % (BN_BYTES));
        497.       if (bn_wexpand(ret, (int)i) == NULL) {
                       ^
        498.           BN_free(bn);
        499.           return NULL;

crypto/bn/bn_lib.c:1016:1: Parameter `*a->d`
          1014.   }
          1015.   
          1016. > BIGNUM *bn_wexpand(BIGNUM *a, int words)
          1017.   {
          1018.       return (words <= a->dmax) ? a : bn_expand2(a, words);

crypto/bn/bn_lib.c:1018:37: Call
          1016.   BIGNUM *bn_wexpand(BIGNUM *a, int words)
          1017.   {
          1018.       return (words <= a->dmax) ? a : bn_expand2(a, words);
                                                      ^
          1019.   }
          1020.   

crypto/bn/bn_lib.c:323:1: Parameter `*b->d`
            321.    */
            322.   
            323. > BIGNUM *bn_expand2(BIGNUM *b, int words)
            324.   {
            325.       bn_check_top(b);

crypto/bn/bn_lib.c:328:23: Call
            326.   
            327.       if (words > b->dmax) {
            328.           BN_ULONG *a = bn_expand_internal(b, words);
                                         ^
            329.           if (!a)
            330.               return NULL;

crypto/bn/bn_lib.c:246:1: <Length trace>
244.   /* This is used by bn_expand2() */
245.   /* The caller MUST check that words > b->dmax before calling this */
246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
247.   {
248.       BN_ULONG *A, *a = NULL;

crypto/bn/bn_lib.c:246:1: Parameter `*b->d`
              244.   /* This is used by bn_expand2() */
              245.   /* The caller MUST check that words > b->dmax before calling this */
              246. > static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
              247.   {
              248.       BN_ULONG *A, *a = NULL;

crypto/bn/bn_lib.c:272:5: Assignment
              270.   
              271.   #if 1
              272.       B = b->d;
                         ^
              273.       /* Check if the previous number needs to be copied */
              274.       if (B != NULL) {

crypto/bn/bn_lib.c:289:18: Array access: Offset: [3, +oo] (⇐ [0, +oo] + 3) Size: [0, 8388607] by call to `BN_X931_generate_Xpq` 
              287.               a1 = B[1];
              288.               a2 = B[2];
              289.               a3 = B[3];
                                      ^
              290.               A[0] = a0;
              291.               A[1] = a1;

static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
{
    BN_ULONG *A, *a = NULL;
    const BN_ULONG *B;
    int i;
    bn_check_top(b);
    if (words > (INT_MAX / (4 * BN_BITS2))) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);
        return NULL;
    }
    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
        return (NULL);
    }
    if (BN_get_flags(b, BN_FLG_SECURE))
        a = A = OPENSSL_secure_zalloc(words * sizeof(*a));
    else
        a = A = OPENSSL_zalloc(words * sizeof(*a));
    if (A == NULL) {
        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);
        return (NULL);
    }
#if 1
    B = b->d;
    if (B != NULL) {
        for (i = b->top >> 2; i > 0; i--, A += 4, B += 4) {
            BN_ULONG a0, a1, a2, a3;
            a0 = B[0];
            a1 = B[1];
            a2 = B[2];
            a3 = B[3];
            A[0] = a0;
            A[1] = a1;
            A[2] = a2;
            A[3] = a3;
        }
        switch (b->top & 3) {
        case 3:
            A[2] = B[2];
        case 2:
            A[1] = B[1];
        case 1:
            A[0] = B[0];
        case 0:
            ;
        }
    }
#else
    memset(A, 0, sizeof(*A) * words);
    memcpy(A, b->d, sizeof(b->d[0]) * b->top);
#endif
    return (a);
}
['int RSA_X931_generate_key_ex(RSA *rsa, int bits, const BIGNUM *e,\n                             BN_GENCB *cb)\n{\n    int ok = 0;\n    BIGNUM *Xp = NULL, *Xq = NULL;\n    BN_CTX *ctx = NULL;\n    ctx = BN_CTX_new();\n    if (ctx == NULL)\n        goto error;\n    BN_CTX_start(ctx);\n    Xp = BN_CTX_get(ctx);\n    Xq = BN_CTX_get(ctx);\n    if (!BN_X931_generate_Xpq(Xp, Xq, bits, ctx))\n        goto error;\n    rsa->p = BN_new();\n    rsa->q = BN_new();\n    if (rsa->p == NULL || rsa->q == NULL)\n        goto error;\n    if (!BN_X931_generate_prime_ex(rsa->p, NULL, NULL, NULL, NULL, Xp,\n                                   e, ctx, cb))\n        goto error;\n    if (!BN_X931_generate_prime_ex(rsa->q, NULL, NULL, NULL, NULL, Xq,\n                                   e, ctx, cb))\n        goto error;\n    if (!RSA_X931_derive_ex(rsa, NULL, NULL, NULL, NULL,\n                            NULL, NULL, NULL, NULL, NULL, NULL, e, cb))\n        goto error;\n    ok = 1;\n error:\n    if (ctx)\n        BN_CTX_end(ctx);\n    BN_CTX_free(ctx);\n    if (ok)\n        return 1;\n    return 0;\n}', 'BIGNUM *BN_CTX_get(BN_CTX *ctx)\n{\n    BIGNUM *ret;\n    CTXDBG_ENTRY("BN_CTX_get", ctx);\n    if (ctx->err_stack || ctx->too_many)\n        return NULL;\n    if ((ret = BN_POOL_get(&ctx->pool, ctx->flags)) == NULL) {\n        ctx->too_many = 1;\n        BNerr(BN_F_BN_CTX_GET, BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n        return NULL;\n    }\n    BN_zero(ret);\n    ctx->used++;\n    CTXDBG_RET(ctx, ret);\n    return ret;\n}', 'int BN_set_word(BIGNUM *a, BN_ULONG w)\n{\n    bn_check_top(a);\n    if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)\n        return (0);\n    a->neg = 0;\n    a->d[0] = w;\n    a->top = (w ? 1 : 0);\n    bn_check_top(a);\n    return (1);\n}', 'static ossl_inline BIGNUM *bn_expand(BIGNUM *a, int bits)\n{\n    if (bits > (INT_MAX - BN_BITS2 + 1))\n        return NULL;\n    if (((bits+BN_BITS2-1)/BN_BITS2) <= (a)->dmax)\n        return a;\n    return bn_expand2((a),(bits+BN_BITS2-1)/BN_BITS2);\n}', 'int BN_X931_generate_Xpq(BIGNUM *Xp, BIGNUM *Xq, int nbits, BN_CTX *ctx)\n{\n    BIGNUM *t;\n    int i;\n    if ((nbits < 1024) || (nbits & 0xff))\n        return 0;\n    nbits >>= 1;\n    if (!BN_rand(Xp, nbits, BN_RAND_TOP_TWO, BN_RAND_BOTTOM_ANY))\n        goto err;\n    BN_CTX_start(ctx);\n    t = BN_CTX_get(ctx);\n    for (i = 0; i < 1000; i++) {\n        if (!BN_rand(Xq, nbits, BN_RAND_TOP_TWO, BN_RAND_BOTTOM_ANY))\n            goto err;\n        BN_sub(t, Xp, Xq);\n        if (BN_num_bits(t) > (nbits - 100))\n            break;\n    }\n    BN_CTX_end(ctx);\n    if (i < 1000)\n        return 1;\n    return 0;\n err:\n    BN_CTX_end(ctx);\n    return 0;\n}', 'int BN_rand(BIGNUM *rnd, int bits, int top, int bottom)\n{\n    return bnrand(0, rnd, bits, top, bottom);\n}', 'static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom)\n{\n    unsigned char *buf = NULL;\n    int ret = 0, bit, bytes, mask;\n    time_t tim;\n    if (bits < 0 || (bits == 1 && top > 0)) {\n        BNerr(BN_F_BNRAND, BN_R_BITS_TOO_SMALL);\n        return 0;\n    }\n    if (bits == 0) {\n        BN_zero(rnd);\n        return 1;\n    }\n    bytes = (bits + 7) / 8;\n    bit = (bits - 1) % 8;\n    mask = 0xff << (bit + 1);\n    buf = OPENSSL_malloc(bytes);\n    if (buf == NULL) {\n        BNerr(BN_F_BNRAND, ERR_R_MALLOC_FAILURE);\n        goto err;\n    }\n    time(&tim);\n    RAND_add(&tim, sizeof(tim), 0.0);\n    if (RAND_bytes(buf, bytes) <= 0)\n        goto err;\n    if (pseudorand == 2) {\n        int i;\n        unsigned char c;\n        for (i = 0; i < bytes; i++) {\n            if (RAND_bytes(&c, 1) <= 0)\n                goto err;\n            if (c >= 128 && i > 0)\n                buf[i] = buf[i - 1];\n            else if (c < 42)\n                buf[i] = 0;\n            else if (c < 84)\n                buf[i] = 255;\n        }\n    }\n    if (top >= 0) {\n        if (top) {\n            if (bit == 0) {\n                buf[0] = 1;\n                buf[1] |= 0x80;\n            } else {\n                buf[0] |= (3 << (bit - 1));\n            }\n        } else {\n            buf[0] |= (1 << bit);\n        }\n    }\n    buf[0] &= ~mask;\n    if (bottom)\n        buf[bytes - 1] |= 1;\n    if (!BN_bin2bn(buf, bytes, rnd))\n        goto err;\n    ret = 1;\n err:\n    OPENSSL_clear_free(buf, bytes);\n    bn_check_top(rnd);\n    return (ret);\n}', 'BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)\n{\n    unsigned int i, m;\n    unsigned int n;\n    BN_ULONG l;\n    BIGNUM *bn = NULL;\n    if (ret == NULL)\n        ret = bn = BN_new();\n    if (ret == NULL)\n        return (NULL);\n    bn_check_top(ret);\n    for ( ; len > 0 && *s == 0; s++, len--)\n        continue;\n    n = len;\n    if (n == 0) {\n        ret->top = 0;\n        return (ret);\n    }\n    i = ((n - 1) / BN_BYTES) + 1;\n    m = ((n - 1) % (BN_BYTES));\n    if (bn_wexpand(ret, (int)i) == NULL) {\n        BN_free(bn);\n        return NULL;\n    }\n    ret->top = i;\n    ret->neg = 0;\n    l = 0;\n    while (n--) {\n        l = (l << 8L) | *(s++);\n        if (m-- == 0) {\n            ret->d[--i] = l;\n            l = 0;\n            m = BN_BYTES - 1;\n        }\n    }\n    bn_correct_top(ret);\n    return (ret);\n}', 'BIGNUM *bn_wexpand(BIGNUM *a, int words)\n{\n    return (words <= a->dmax) ? a : bn_expand2(a, words);\n}', 'BIGNUM *bn_expand2(BIGNUM *b, int words)\n{\n    bn_check_top(b);\n    if (words > b->dmax) {\n        BN_ULONG *a = bn_expand_internal(b, words);\n        if (!a)\n            return NULL;\n        if (b->d) {\n            OPENSSL_cleanse(b->d, b->dmax * sizeof(b->d[0]));\n            bn_free_d(b);\n        }\n        b->d = a;\n        b->dmax = words;\n    }\n    bn_check_top(b);\n    return b;\n}', 'static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)\n{\n    BN_ULONG *A, *a = NULL;\n    const BN_ULONG *B;\n    int i;\n    bn_check_top(b);\n    if (words > (INT_MAX / (4 * BN_BITS2))) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);\n        return NULL;\n    }\n    if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);\n        return (NULL);\n    }\n    if (BN_get_flags(b, BN_FLG_SECURE))\n        a = A = OPENSSL_secure_zalloc(words * sizeof(*a));\n    else\n        a = A = OPENSSL_zalloc(words * sizeof(*a));\n    if (A == NULL) {\n        BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);\n        return (NULL);\n    }\n#if 1\n    B = b->d;\n    if (B != NULL) {\n        for (i = b->top >> 2; i > 0; i--, A += 4, B += 4) {\n            BN_ULONG a0, a1, a2, a3;\n            a0 = B[0];\n            a1 = B[1];\n            a2 = B[2];\n            a3 = B[3];\n            A[0] = a0;\n            A[1] = a1;\n            A[2] = a2;\n            A[3] = a3;\n        }\n        switch (b->top & 3) {\n        case 3:\n            A[2] = B[2];\n        case 2:\n            A[1] = B[1];\n        case 1:\n            A[0] = B[0];\n        case 0:\n            ;\n        }\n    }\n#else\n    memset(A, 0, sizeof(*A) * words);\n    memcpy(A, b->d, sizeof(b->d[0]) * b->top);\n#endif\n    return (a);\n}']