static unsigned int BN_STACK_pop(BN_STACK *st)
{
    return st->indexes[--(st->depth)];
}
['int rsa_check_crt_components(const RSA *rsa, BN_CTX *ctx)\n{\n    int ret = 0;\n    BIGNUM *r = NULL, *p1 = NULL, *q1 = NULL;\n    if (rsa->dmp1 == NULL || rsa->dmq1 == NULL || rsa->iqmp == NULL) {\n        if (rsa->dmp1 != NULL || rsa->dmq1 != NULL || rsa->iqmp != NULL)\n            return 0;\n        return 1;\n    }\n    BN_CTX_start(ctx);\n    r = BN_CTX_get(ctx);\n    p1 = BN_CTX_get(ctx);\n    q1 = BN_CTX_get(ctx);\n    ret = (q1 != NULL)\n          && (BN_copy(p1, rsa->p) != NULL)\n          && BN_sub_word(p1, 1)\n          && (BN_copy(q1, rsa->q) != NULL)\n          && BN_sub_word(q1, 1)\n          && (BN_cmp(rsa->dmp1, BN_value_one()) > 0)\n          && (BN_cmp(rsa->dmp1, p1) < 0)\n          && (BN_cmp(rsa->dmq1, BN_value_one()) > 0)\n          && (BN_cmp(rsa->dmq1, q1) < 0)\n          && (BN_cmp(rsa->iqmp, BN_value_one()) > 0)\n          && (BN_cmp(rsa->iqmp, rsa->p) < 0)\n          && BN_mod_mul(r, rsa->dmp1, rsa->e, p1, ctx)\n          && BN_is_one(r)\n          && BN_mod_mul(r, rsa->dmq1, rsa->e, q1, ctx)\n          && BN_is_one(r)\n          && BN_mod_mul(r, rsa->iqmp, rsa->q, rsa->p, ctx)\n          && BN_is_one(r);\n    BN_clear(p1);\n    BN_clear(q1);\n    BN_CTX_end(ctx);\n    return ret;\n}', 'void BN_CTX_start(BN_CTX *ctx)\n{\n    CTXDBG("ENTER BN_CTX_start()", ctx);\n    if (ctx->err_stack || ctx->too_many)\n        ctx->err_stack++;\n    else if (!BN_STACK_push(&ctx->stack, ctx->used)) {\n        BNerr(BN_F_BN_CTX_START, BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n        ctx->err_stack++;\n    }\n    CTXDBG("LEAVE BN_CTX_start()", ctx);\n}', 'BIGNUM *BN_CTX_get(BN_CTX *ctx)\n{\n    BIGNUM *ret;\n    CTXDBG("ENTER 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    ret->flags &= (~BN_FLG_CONSTTIME);\n    ctx->used++;\n    CTXDBG("LEAVE BN_CTX_get()", ctx);\n    return ret;\n}', 'void BN_CTX_end(BN_CTX *ctx)\n{\n    CTXDBG("ENTER BN_CTX_end()", ctx);\n    if (ctx->err_stack)\n        ctx->err_stack--;\n    else {\n        unsigned int fp = BN_STACK_pop(&ctx->stack);\n        if (fp < ctx->used)\n            BN_POOL_release(&ctx->pool, ctx->used - fp);\n        ctx->used = fp;\n        ctx->too_many = 0;\n    }\n    CTXDBG("LEAVE BN_CTX_end()", ctx);\n}', 'static unsigned int BN_STACK_pop(BN_STACK *st)\n{\n    return st->indexes[--(st->depth)];\n}']